Altered inflammatory mucosal signatures within their spatial and cellular context during active ileal Crohn’s disease
Kolachala et al. integrated single-cell and spatial transcriptomics to identify cellular networks and coordinated molecules distinguishing active Crohn’s disease and assessed their spatial distribution on diseased tissues. The cover image shows ileal tissue from a patient with Crohn’s disease, revealing CD74 (green) and HLA-DR (red) expression in the epithelial cells. DAPI (nuclear stain) is shown in blue, and E-cadherin (epithelial marker) is shown in white.
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Research Letter
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Abstract
Authors
Juliane Schwanbeck, Max Stahnke, Anna Eberlein, Madeleine Goeritzer, Arndt Schulze, Dominique Pernitsch, Dagmar Kolb, Gernot F. Grabner, Theda U.P. Bartolomaeus, Sofia K. Forslund, Holger Gerhardt, Gabriele G. Schiattarella, Lucia Cocera Ortega, Natalia López-Anguita, Erin E. Kershaw, Henrike Maatz, Norbert Hübner, Rudolf Zechner, Anna Foryst-Ludwig, Ulrich Kintscher
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Research Articles
Vasantha L. Kolachala, … , Jason D. Matthews, Subra Kugathasan Published March 10, 2025
Citation Information: JCI Insight. 2025;10(5):e171783. https://doi.org/10.1172/jci.insight.171783.
×Abstract
Crohn’s disease (CD) involves a complex intestinal microenvironment driven by chronic inflammation. While single-cell RNA sequencing has provided valuable insights into this biology, the spatial context is lost during single-cell preparation of mucosal biopsies. To deepen our understanding of the distinct inflammatory signatures of CD and overcome the limitations of single-cell RNA sequencing, we combined spatial transcriptomics of frozen CD surgical tissue sections with single-cell transcriptomics of ileal CD mucosa. Coexpressed genes and cell-cell communication from single-cell analyses and factorized genes from spatial transcriptomics revealed overlapping pathways affected in inflamed CD, like antigen presentation, phagosome activity, cell adhesion, and extracellular matrix. Within the pathways, early epithelial cells showed evidence of significant changes in gene expression and subtype composition, while spatial mapping revealed the location of the events, particularly antigen presentation from epithelial cells in the base of the crypt. Furthermore, we identified early epithelial cells as a potential mediator of the MHC class II pathway during inflammation, which we validated by spatial transcriptomics cell subtype deconvolution. Therefore, the inflammation from CD appears to change the types of interactions detectable between epithelial cells with immune and mesenchymal cells, likely promoting the conditions for more macrophage infiltration into these inflammatory microdomains.
Authors
Vasantha L. Kolachala, Sushma Chowdary Maddipatla, Shanta Murthy, Yeonjoo Hwang, Anne F. Dodd, Garima Sharma, Sachith Munasinghe, Ranjit Singh Pelia, Suresh Venkateswaran, Murugadas Anbazhagan, Tarun Koti, Navdeep Jhita, Gaurav N. Joshi, Chrissy A. Lopez, Duke Geem, Hong Yin, David J. Cutler, Peng Qiu, Jason D. Matthews, Subra Kugathasan
×Abstract
Glioblastoma (GBM) is one of the most lethal adult brain tumors with limited effective therapeutic options. Immunotherapy targeting B7-H3 (CD276) has shown promising efficacy in the treatment of gliomas. However, the response to this treatment varies among glioma patients due to individual differences. It’s necessary to find an effective strategy to improve the efficacy of targeting B7-H3 immunotherapy for nonresponders. In this study, we demonstrated a strong correlation between aurora kinase A (AURKA) and CD276 expression in glioma tissue samples. Additionally, both AURKA knockdown and overexpression resulted in parallel changes in B7-H3 expression levels in glioma cells. Mechanistically, AURKA elevated B7-H3 expression by promoting epidermal growth factor receptor (EGFR) phosphorylation, which was validated in glioma cell lines and primary GBM cells. What’s more, the combination of AURKA inhibitor (alisertib) and anti–B7-H3 antibody markedly reduced tumor size and promoted CD8+ T cell infiltration and activation in mouse orthotopic syngeneic glioma models. To our knowledge, this study is the first to demonstrate AURKA-mediated B7-H3 upregulation in glioma cells; moreover, it proposes a promising therapeutic strategy combining the AURKA inhibitor alisertib with B7-H3–specific blocking mAbs.
Authors
Jinqiu Liu, Yuxuan Deng, Zhuonan Pu, Yazhou Miao, Zhaonian Hao, Herui Wang, Shaodong Zhang, Hanjie Liu, Jiejun Wang, Yifan Lv, Boyi Hu, Hong Wan, Zhengping Zhuang, Tai Sun, Shuyu Hao, Nan Ji, Jie Feng
Jean-Michel Paumier, … , Jeffrey N. Savas, Puneet Opal Published March 10, 2025
Citation Information: JCI Insight. 2025;10(5):e177999. https://doi.org/10.1172/jci.insight.177999.
×Abstract
Neurofilament accumulation is associated with many neurodegenerative diseases, but it is the primary pathology in giant axonal neuropathy (GAN). This childhood-onset autosomal recessive disease is caused by loss-of-function mutations in gigaxonin, the E3 adaptor protein that enables neurofilament degradation. Using a combination of genetic and RNA interference approaches, we found that dorsal root ganglia from mice lacking gigaxonin have impaired autophagy and lysosomal degradation through 2 mechanisms. First, neurofilament accumulations interfere with the distribution of autophagic organelles, impairing their maturation and fusion with lysosomes. Second, the accumulations attract the chaperone 14-3-3, which is responsible for the proper localization of the key autophagy regulator transcription factor EB (TFEB). We propose that this dual disruption of autophagy contributes to the pathogenesis of other neurodegenerative diseases involving neurofilament accumulations.
Authors
Jean-Michel Paumier, James Zewe, Chiranjit Panja, Melissa R. Pergande, Meghana Venkatesan, Eitan Israeli, Shikha Prasad, Natasha Snider, Jeffrey N. Savas, Puneet Opal
QiQi Zhou, … , Amber T. Thacker, G. Nicholas Verne Published March 10, 2025
Citation Information: JCI Insight. 2025;10(5):e178631. https://doi.org/10.1172/jci.insight.178631.
×Abstract
Postinfectious, diarrhea-predominant, irritable bowel syndrome (PI-IBS-D) is difficult to treat owing to its unknown pathophysiology. Extracellular vesicles (EVs) derived from human colon tissue and long noncoding RNAs (lncRNAs), such as growth arrest–specific 5 (GAS5), may play key roles in the pathophysiology of PI-IBS-D. To determine whether altered colonic EV lncRNA signaling leads to gastrointestinal dysfunction and heightened visceral nociception in patients with PI-IBS-D via the GAS5/miR-23ab/NMDA NR2B axis, we conducted translational studies, including those on (a) the role of colonic EV lncRNAs in patients with PI-IBS-D, human colonoids, and PI-IBS-D tissues; (b) i.p. injection of colonic EVs from patients with PI-IBS-D into Rab27a/b–/– mice (P-EV mice) to investigate whether colonic EVs drive visceral hypersensitivity in vivo via the GAS5/miR-23ab/NMDA NR2B axis; and (c) treatment of mice with oligo-miR-23 precursors and anti-GAS5 Vivo-Morpholinos for GAS5/miR-23ab/NMDA NR2B axis mechanisms. Colonic EVs from patients with PI-IBS-D, but not from control participants, demonstrated reduced miR-23a/b expression caused by enhanced GAS5 expression, which drives increased NR2B expression. Intraperitoneal injection of anti–GAS5-Vivo-Morpholino into P-EV mice increased miR-23 levels and decreased NR2B expression and VMR to CD. EVs are internal messengers that alter gastrointestinal function and increase visceral nociception in patients with PI-IBS-D. Strategies to deliver EVs to modulate GAS5/miR-23ab/NMDA NR2B axis signaling may lead to new and innovative treatments for patients with PI-IBS-D.
Authors
QiQi Zhou, Liuqing Yang, Zachary T. Verne, Benjamin B. Zhang, Jeremy Z. Fields, Amber T. Thacker, G. Nicholas Verne
Hetal S. Shah, … , Mel B. Feany, George L. King Published January 30, 2025
Citation Information: JCI Insight. 2025;10(5):e180226. https://doi.org/10.1172/jci.insight.180226.
×Abstract
BACKGROUND We aimed to characterize factors associated with the under-studied complication of cognitive decline in aging people with long-duration type 1 diabetes (T1D).METHODS Joslin “Medalists” (n = 222; T1D ≥ 50 years) underwent cognitive testing. Medalists (n = 52) and age-matched nondiabetic controls (n = 20) underwent neuro- and retinal imaging. Brain pathology (n = 26) was examined. Relationships among clinical, cognitive, and neuroimaging parameters were evaluated.RESULTS Compared with controls, Medalists had worse psychomotor function and recall, which associated with female sex, lower visual acuity, reduced physical activity, longer diabetes duration, and higher inflammatory cytokines. On neuroimaging, compared with controls, Medalists had significantly lower total and regional brain volumes, equivalent to 9 years of accelerated aging, but small vessel disease markers did not differ. Reduced brain volumes associated with female sex, reduced psychomotor function, worse visual acuity, longer diabetes duration, and higher inflammation, but not with glycemic control. Worse cognitive function, lower brain volumes, and diabetic retinopathy correlated with thinning of the outer retinal nuclear layer. Worse baseline visual acuity associated with declining psychomotor function in longitudinal analysis. Brain volume mediated the association between visual acuity and psychomotor function by 57%. Brain pathologies showed decreased volumes, but predominantly mild vascular or Alzheimer’s-related pathology.CONCLUSION To our knowledge, this is the first comprehensive study of cognitive function, neuroimaging, and pathology in aging T1D individuals demonstrated that cognitive decline was related to parenchymal rather than neurovascular abnormalities, unlike type 2 diabetes, suggestive of accelerated aging in T1D. Improving visual acuity could perhaps be an important preventive measure against cognitive decline in people with T1D.FUNDING The Beatson Foundation, NIH/NIDDK grants 3P30DK036836-34S1 and P30DK036836-37, and Mary Iacocca fellowships.
Authors
Hetal S. Shah, Matthew N. DeSalvo, Anastasia Haidar, Surya Vishva Teja Jangolla, Marc Gregory Yu, Rebecca S. Roque, Amanda Hayes, John Gauthier, Nolan Ziemniak, Elizabeth Viebranz, I-Hsien Wu, Kyoungmin Park, Ward Fickweiler, Tanvi J. Chokshi, Tashrif Billah, Lipeng Ning, Atif Adam, Jennifer K. Sun, Lloyd Paul Aiello, Yogesh Rathi, Mel B. Feany, George L. King
Juan Rivera-Correa, … , Leandro Cerchietti, Alessandra B. Pernis Published February 4, 2025
Citation Information: JCI Insight. 2025;10(5):e180507. https://doi.org/10.1172/jci.insight.180507.
×Abstract
The mechanisms utilized by differentiating B cells to withstand highly damaging conditions generated during severe infections, like the massive hemolysis that accompanies malaria, are poorly understood. Here, we demonstrate that ROCK1 regulates B cell differentiation in hostile environments replete with pathogen-associated molecular patterns (PAMPs) and high levels of heme by controlling 2 key heme-regulated molecules, BACH2 and heme-regulated eIF2α kinase (HRI). ROCK1 phosphorylates BACH2 and protects it from heme-driven degradation. As B cells differentiate, furthermore, ROCK1 restrains their pro-inflammatory potential and helps them handle the heightened stress imparted by the presence of PAMPs and heme by controlling HRI, a key regulator of the integrated stress response and cytosolic proteotoxicity. ROCK1 controls the interplay of HRI with HSP90 and limits the recruitment of HRI and HSP90 to unique p62/SQSTM1 complexes that also contain critical kinases like mTOR complex 1 and TBK1, and proteins involved in RNA metabolism, oxidative damage, and proteostasis like TDP-43. Thus, ROCK1 helps B cells cope with intense pathogen-driven destruction by coordinating the activity of key controllers of B cell differentiation and stress responses. These ROCK1-dependent mechanisms may be widely employed by cells to handle severe environmental stresses, and these findings may be relevant for immune-mediated and age-related neurodegenerative disorders.
Authors
Juan Rivera-Correa, Sanjay Gupta, Edd Ricker, Danny Flores-Castro, Daniel Jenkins, Stephen Vulcano, Swati P. Phalke, Tania Pannellini, Matthew M. Miele, Zhuoning Li, Nahuel Zamponi, Young-Bum Kim, Yurii Chinenov, Eugenia Giannopoulou, Leandro Cerchietti, Alessandra B. Pernis
Bryce A. Jones, … , Michael T. Eadon, Moshe Levi Published March 10, 2025
Citation Information: JCI Insight. 2025;10(5):e181443. https://doi.org/10.1172/jci.insight.181443.
×Abstract
Chronic kidney disease (CKD) is associated with renal metabolic disturbances, including impaired fatty acid oxidation (FAO). Nicotinamide adenine dinucleotide (NAD+) is a small molecule that participates in hundreds of metabolism-related reactions. NAD+ levels are decreased in CKD, and NAD+ supplementation is protective. However, both the mechanism of how NAD+ supplementation protects from CKD, as well as the cell types involved, are poorly understood. Using a mouse model of Alport syndrome, we show that nicotinamide riboside (NR), an NAD+ precursor, stimulated renal PPARα signaling and restored FAO in the proximal tubules, thereby protecting from CKD in both sexes. Bulk RNA-sequencing showed that renal metabolic pathways were impaired in Alport mice and activated by NR in both sexes. These transcriptional changes were confirmed by orthogonal imaging techniques and biochemical assays. Single-nuclei RNA sequencing and spatial transcriptomics, both the first of their kind to our knowledge from Alport mice, showed that NAD+ supplementation restored FAO in proximal tubule cells. Finally, we also report, for the first time to our knowledge, sex differences at the transcriptional level in this Alport model. In summary, the data herein identify a nephroprotective mechanism of NAD+ supplementation in CKD, and they demonstrate that this benefit localizes to the proximal tubule cells.
Authors
Bryce A. Jones, Debora L. Gisch, Komuraiah Myakala, Amber Sadiq, Ying-Hua Cheng, Elizaveta Taranenko, Julia Panov, Kyle Korolowicz, Ricardo Melo Ferreira, Xiaoping Yang, Briana A. Santo, Katherine C. Allen, Teruhiko Yoshida, Xiaoxin X. Wang, Avi Z. Rosenberg, Sanjay Jain, Michael T. Eadon, Moshe Levi
Meng Wu, … , Ying Ye, Jianxin Wan Published January 30, 2025
Citation Information: JCI Insight. 2025;10(5):e184468. https://doi.org/10.1172/jci.insight.184468.
×Abstract
Renal osteodystrophy is commonly seen in patients with chronic kidney disease (CKD) due to disrupted mineral homeostasis. Given the impaired renal function in these patients, common antiresorptive agents, including bisphosphonates, must be used with caution or even contraindicated. Therefore, an alternative therapy without renal burden to combat renal osteodystrophy is urgently needed. Here, we report that clinically relevant aerobic exercise significantly prevents high-turnover renal osteodystrophy in CKD mice and patients with CKD without compromising renal function. Mechanistically, 4-week aerobic exercise in CKD mice increased expression of skeletal muscle PPARγ coactivator-1α (PGC-1α) and circulating irisin. Both exercise and irisin administration significantly activated osteoblasts, but not osteoclasts, via integrin αvβ5, thereby conferring bone quality benefits. Removal of irisin-influenced thermogenic adipose tissues or genetic ablation of uncoupling protein 1 did not alter the irisin-conferred antiosteodystrophy effect. Importantly, in a pilot clinical study, 12-week aerobic exercise in patients with high-grade CKD significantly increased circulating irisin and prevented osteodystrophy progression, without detectable renal burden. The combination of irisin and current antiresorptive agents effectively rescued renal osteodystrophy in mice. Our work provides mechanistic insights into the role of exercise and irisin in renal osteodystrophy, and it highlights a clinically relevant, low-cost, kidney-friendly therapy for patients with this devastating disease.
Authors
Meng Wu, Huilan Li, Xiaoting Sun, Rongrong Zhong, Linli Cai, Ruibo Chen, Madiya Madeniyet, Kana Ren, Zhen Peng, Yujie Yang, Weiqin Chen, Yanling Tu, Miaoxin Lai, Jinxiu Deng, Yuting Wu, Shumin Zhao, Qingyan Ruan, Mei Rao, Sisi Xie, Ying Ye, Jianxin Wan
Lorenzo M. Fernandes, … , Joshua P. Scallan, Michael T. Dellinger Published January 28, 2025
Citation Information: JCI Insight. 2025;10(5):e185181. https://doi.org/10.1172/jci.insight.185181.
×Abstract
Somatic activating mutations in KRAS can cause complex lymphatic anomalies (CLAs). However, the specific processes that drive KRAS-mediated CLAs have yet to be fully elucidated. Here, we used single-cell RNA sequencing to construct an atlas of normal and KrasG12D-malformed lymphatic vessels. We identified 6 subtypes of lymphatic endothelial cells (LECs) in the lungs of adult wild-type mice (Ptx3, capillary, collecting, valve, mixed, and proliferating). To determine when the LEC subtypes were specified during development, we integrated our data with data from 4 stages of development. We found that proliferating and Ptx3 LECs were prevalent during early lymphatic development and that collecting and valve LECs emerged later in development. Additionally, we discovered that the proportion of Ptx3 LECs decreased as the lymphatic network matured but remained high in KrasG12D mice. We also observed that the proportion of collecting and valve LECs was lower in KrasG12D mice than in wild-type mice. Last, we found that immature lymphatic vessels in young mice were more sensitive to the pathologic effects of KrasG12D than mature lymphatic vessels in older mice. Together, our results expand the current model for the development of the lymphatic system and suggest that KRAS mutations impair the maturation of lymphatic vessels.
Authors
Lorenzo M. Fernandes, Danielle Griswold-Wheeler, Jeffrey D. Tresemer, Angelica Vallejo, Neda Vishlaghi, Benjamin Levi, Abigail Shapiro, Joshua P. Scallan, Michael T. Dellinger
Takao Ukaji, … , Osamu Nureki, Kazusaku Kamiya Published March 10, 2025
Citation Information: JCI Insight. 2025;10(5):e185193. https://doi.org/10.1172/jci.insight.185193.
×Abstract
Mutations in the gap junction β2 (GJB2) gene, which encodes connexin 26, are the leading cause of genetic deafness. These mutations are characterized by the degeneration and fragmentation of gap junctions and gap junction plaques (GJPs) composed of connexin 26. Dominant-negative mutations of GJB2, such as R75W, cause syndromic hearing loss and palmoplantar keratoderma. We previously reported that the R75W mutation, a single-base substitution where C is replaced by T, causes fragmentation of GJPs. Therefore, an adenine base editor (ABE), which enables A-to-G base conversions, can potentially be useful for the treatment of this genetic disease. Here, we report that an all-in-one adeno-associated virus (AAV) vector, which includes a compact ABE (SaCas9-NNG-ABE8e) with broad targeting range, and a sgRNA targeting the R75W mutation in GJB2 corrected this pathogenic mutation and facilitated the recovery of the gap junction intercellular communication network of GJPs. In a transgenic mouse model with the GJB2 R75W mutation, AAV-mediated base editing also restored the fragmented GJPs to orderly outlines in cochlear supporting cells. Our findings suggest that an ABE-based base-editing strategy could be an optimal treatment for the dominant form of GJB2-related hearing loss, GJB2-related skin diseases, and other deafness-related mutations, especially single-base substitutions.
Authors
Takao Ukaji, Daisuke Arai, Harumi Tsutsumi, Ryoya Nakagawa, Fumihiko Matsumoto, Katsuhisa Ikeda, Osamu Nureki, Kazusaku Kamiya
×Abstract
The effect of preexisting neutralizing antibodies (NAb) on SARS-CoV-2 shedding in postvaccination infection (PVI) is not well understood. We characterized viral shedding longitudinally in nasal specimens in relation to baseline (pre/periinfection) serum NAb titers in 125 participants infected with SARS-CoV-2 variants. Among 68 vaccinated participants, we quantified the effect of baseline NAb titers on maximum viral RNA titers and infectivity duration. Baseline NAbs were higher and targeted a broader range of variants in participants with monovalent ancestral booster vaccinations compared with those with a primary vaccine series. In Delta infections, baseline NAb titers targeting Delta or Wuhan-Hu-1 correlated negatively with maximum viral RNA. Per log10 increase in Delta-targeting baseline NAb IC50, maximum viral load was reduced –2.43 (95% CI: –3.76, –1.11) log10 nucleocapsid copies, and infectious viral shedding was reduced –2.79 (95% CI: –4.99, –0.60) days. Conversely, in Omicron infections (BA.1, BA.2, BA.4, or BA.5), baseline NAb titers against Omicron lineages or Wuhan-Hu-1 did not predict viral outcomes. Our results provide robust estimates of the effect of baseline NAbs on the magnitude and duration of nasal viral replication after PVI (albeit with an unclear effect on transmission) and show how immune escape variants efficiently evade these modulating effects.
Authors
Miguel A. Garcia-Knight, J. Daniel Kelly, Scott Lu, Michel Tassetto, Sarah A. Goldberg, Amethyst Zhang, Jesus Pineda-Ramirez, Khamal Anglin, Michelle C. Davidson, Jessica Y. Chen, Maya Fortes-Cobby, Sara Park, Ana Martinez, Matthew So, Aidan Donovan, Badri Viswanathan, Eugene T. Richardson, David R. McIlwain, Brice Gaudilliere, Rachel L. Rutishauser, Ahmed Chenna, Christos Petropoulos, Terri Wrin, Steven G. Deeks, Glen R. Abedi, Sharon Saydah, Jeffrey N. Martin, Melissa Briggs Hagen, Claire M. Midgley, Michael J. Peluso, Raul Andino
Sandra van Wilpe, … , Pedro Romero, Niven Mehra Published January 30, 2025
Citation Information: JCI Insight. 2025;10(5):e186062. https://doi.org/10.1172/jci.insight.186062.
×Abstract
BACKGROUND. Previously, we demonstrated that changes in circulating tumor DNA (ctDNA) are promising biomarkers for early response prediction (ERP) to immune checkpoint inhibitors (ICIs) in metastatic urothelial cancer (mUC). In this study, we investigated the value of whole-blood immunotranscriptomics for ERP-ICI and integrated both biomarkers into a multimodal model to boost accuracy. METHODS. Blood samples of 93 patients were collected at baseline and after 2–6 weeks of ICI for ctDNA (n = 88) and immunotranscriptome (n = 79) analyses. ctDNA changes were dichotomized into increase or no increase, the latter including patients with undetectable ctDNA. For RNA model development, the cohort was split into discovery (n = 29), test (n = 29), and validation sets (n = 21). Finally, RNA- and ctDNA-based predictions were integrated in a multimodal model. Clinical benefit (CB) was defined as progression-free survival beyond 6 months. RESULTS. Sensitivity (SN) and specificity (SP) of ctDNA increase for predicting non-CB (N-CB) was 59% and 92%, respectively. Immunotranscriptome analysis revealed upregulation of T cell activation, proliferation, and interferon signaling during treatment in the CB group, in contrast with N-CB patients. Based on these differences, a 10-gene RNA model was generated, reaching an SN and SP of 73% and 79%, respectively, in the test and 67% and 67% in the validation set for predicting N-CB. Multimodal model integration led to superior performance, with an SN and SP of 79% and 100%, respectively, in the validation cohort. CONCLUSION. The combination of whole-blood immunotranscriptome and ctDNA in a multimodal model showed promise for ERP-ICI in mUC and accurately identified patients with N-CB. FUNDING. Eurostars grant E! 114908 - PRECISE, Paul Speth Foundation (Bullseye project).
Authors
Sandra van Wilpe, Davide Croci, Sara S. Fonseca Costa, Iris B.A.W. te Paske, Sofie H. Tolmeijer, Jolique van Ipenburg, Leonie I. Kroeze, Simona Pavan, Sylvain Monnier-Benoit, Guido Coccia, Noushin Hadadi, Irma M. Oving, Tineke J. Smilde, Theo van Voorthuizen, Marieke Berends, Mira D. Franken, Marjolijn J.L. Ligtenberg, Sahar Hosseinian Ehrensberger, Laura Ciarloni, Pedro Romero, Niven Mehra
Fadhl Alakwaa, … , Anil Karihaloo, Sean Eddy Published March 10, 2025
Citation Information: JCI Insight. 2025;10(5):e186070. https://doi.org/10.1172/jci.insight.186070.
×Abstract
Chronic kidney diseases (CKDs) are a global health concern, necessitating a comprehensive understanding of their complex pathophysiology. This study explores the use of 2 complementary multidimensional -omics data integration methods to elucidate mechanisms of CKD progression as a proof of concept. Baseline biosamples from 37 participants with CKD in the Clinical Phenotyping and Resource Biobank Core (C-PROBE) cohort with prospective longitudinal outcome data ascertained over 5 years were used to generate molecular profiles. Tissue transcriptomic, urine and plasma proteomic, and targeted urine metabolomic profiling were integrated using 2 orthogonal multi-omics data integration approaches, one unsupervised and the other supervised. Both integration methods identified 8 urinary proteins significantly associated with long-term outcomes, which were replicated in an adjusted survival model using 94 samples from an independent validation group in the same cohort. The 2 methods also identified 3 shared enriched pathways: the complement and coagulation cascades, cytokine–cytokine receptor interaction pathway, and the JAK/STAT signaling pathway. Use of different multiscalar data integration strategies on the same data enabled identification and prioritization of disease mechanisms associated with CKD progression. Approaches like this will be invaluable with the expansion of high-dimension data in kidney diseases.
Authors
Fadhl Alakwaa, Vivek Das, Arindam Majumdar, Viji Nair, Damian Fermin, Asim B. Dey, Timothy Slidel, Dermot F. Reilly, Eugene Myshkin, Kevin L. Duffin, Yu Chen, Markus Bitzer, Subramaniam Pennathur, Frank C. Brosius, Matthias Kretzler, Wenjun Ju, Anil Karihaloo, Sean Eddy
×Abstract
Endometriosis is a chronic gynecological disease that affects 1 in 10 reproductive-aged women. Most studies investigate established disease; however, the initiation and early events in endometriotic lesion development remain poorly understood. Our study used neutrophils from human menstrual effluent from patients with and without endometriosis for immunophenotyping, and it used a mouse model of endometriosis and a mouse endometriosis cell line to determine the role of neutrophils in the initiating events of endometriosis, including attachment and survival of minced endometrial pieces. In menstrual effluent from women with endometriosis, the ratios of aged and proangiogenic neutrophils increased compared with controls, indicating a potentially permissive proinflammatory microenvironment. In our endometriosis mouse model, knocking down neutrophil recruitment with α-CXCR2 into the peritoneum decreased endometrial tissue adhesion — supported by decreased levels of myeloperoxidase and neutrophil elastase in both developing lesions and peritoneal fluid. Fibrinogen was identified as the preferred substrate for endometrial cell adhesion in an in vitro adhesion assay and in developing lesions in vivo. Together, aged and proangiogenic neutrophils and their secretions likely promote attachment and formation of endometriotic lesions by releasing neutrophil extracellular traps and upregulating fibrinogen expression as a provisional matrix to establish attachment and survival in the development of endometriosis lesions.
Authors
Taylor R. Wilson, Kurt R. Peterson, Stephanie A. Morris, Damaris Kuhnell, Susan Kasper, Katherine A. Burns
×Abstract
Surgery of the tracheobronchial tree carries high morbidity, with over half of the complications occurring at the anastomosis. Although fibroblasts are crucial in airway wound healing, the underlying cellular and molecular mechanisms in airway reconstruction remain unknown. We hypothesized that airway reconstruction initiates a surgery-induced stress (SIS) response, altering fibroblast communication within airway tissues. Using single-cell RNA-Seq, we analyzed native and reconstructed airways and identified 5 fibroblast subpopulations, each with distinct spatial distributions across anastomotic, submucosal, perichondrial, and paratracheal areas. During homeostasis, adventitial and airway fibroblasts (Adventitial-Fb and Airway-Fb, respectively) maintained tissue structure and created cellular niches by regulating ECM turnover. Under SIS, perichondrial fibroblasts (PC-Fb) exhibited chondroprogenitor-like gene signatures, and immune-recruiting fibroblasts (IR-Fb) facilitated cell infiltration. Cthrc1-activated fibroblasts (Cthrc1+ Fb), mainly derived from Adventitial-Fb, primarily contributed to fibrotic scar formation and collagen production, mediated by TGF-β. Furthermore, repeated SIS created an imbalance in fibroblast states favoring emergence of CTHRC1+ Fb and leading to impaired fibroblasts–basal cell crosstalk. Collectively, these data identify PC, IR, and Cthrc1+ Fb as a signaling hub, with SIS emerging as a mechanism initiating airway remodeling after reconstruction that, if not controlled, may lead to complications such as stenosis or anastomotic breakdown.
Authors
Jazmin Calyeca, Zakarie Hussein, Zheng Hong Tan, Lumei Liu, Sayali Dharmadhikari, Kimberly M. Shontz, Tatyana A. Vetter, Christopher K. Breuer, Susan D. Reynolds, Tendy Chiang
Chunying Li, … , Kenneth P. Nephew, Jia Shen Published March 10, 2025
Citation Information: JCI Insight. 2025;10(5):e186344. https://doi.org/10.1172/jci.insight.186344.
×Abstract
Glioblastoma (GBM) is the most lethal brain cancer, with GBM stem cells (GSCs) driving therapeutic resistance and recurrence. Targeting GSCs offers a promising strategy for preventing tumor relapse and improving outcomes. We identify SUV39H1, a histone-3, lysine-9 methyltransferase, as critical for GSC maintenance and GBM progression. SUV39H1 is upregulated in GBM compared with normal brain tissues, with single-cell RNA-seq showing its expression predominantly in GSCs due to super-enhancer–mediated activation. Knockdown of SUV39H1 in GSCs impaired their proliferation and stemness. Whole-cell RNA-seq analysis revealed that SUV39H1 regulates G2/M cell cycle progression, stem cell maintenance, and cell death pathways in GSCs. By integrating the RNA-seq data with ATAC-seq data, we further demonstrated that knockdown of SUV39H1 altered chromatin accessibility in key genes associated with these pathways. Chaetocin, an SUV39H1 inhibitor, mimics the effects of SUV39H1 knockdown, reducing GSC stemness and sensitizing cells to temozolomide, a standard GBM chemotherapy. In a patient-derived xenograft model, targeting SUV39H1 inhibits GSC-driven tumor growth. Clinically, high SUV39H1 expression correlates with poor glioma prognosis, supporting its relevance as a therapeutic target. This study identifies SUV39H1 as a crucial regulator of GSC maintenance and a promising therapeutic target to improve GBM treatment and patient outcomes.
Authors
Chunying Li, Qiqi Xie, Sugata Ghosh, Bihui Cao, Yuanning Du, Giau V. Vo, Timothy Y. Huang, Charles Spruck, Richard L. Carpenter, Y. Alan Wang, Q. Richard Lu, Kenneth P. Nephew, Jia Shen
Jessica M. Devenport, … , Mary M. Mullen, Abby M. Green Published March 10, 2025
Citation Information: JCI Insight. 2025;10(5):e186409. https://doi.org/10.1172/jci.insight.186409.
×Abstract
High-grade serous ovarian cancer (HGSOC) is the most prevalent and aggressive histological subtype of ovarian cancer and often presents with metastatic disease. The drivers of metastasis in HGSOC remain enigmatic. APOBEC3A (A3A), an enzyme that generates mutations across various cancers, has been proposed as a mediator of tumor heterogeneity and disease progression. However, the role of A3A in HGSOC has not been explored. We observed an association between high levels of APOBEC3-mediated mutagenesis and poor overall survival in primary HGSOC. We experimentally addressed this correlation by modeling A3A expression in HGSOC, and this resulted in increased metastatic behavior of HGSOC cells in culture and distant metastatic spread in vivo, which was dependent on catalytic activity of A3A. A3A activity in both primary and cultured HGSOC cells yielded consistent alterations in expression of epithelial-mesenchymal transition (EMT) genes resulting in hybrid EMT and mesenchymal signatures, providing a mechanism for their increased metastatic potential. Inhibition of key EMT factors TWIST1 and IL-6 resulted in mitigation of A3A-dependent metastatic phenotypes. Our findings define the prevalence of A3A mutagenesis in HGSOC and implicate A3A as a driver of HGSOC metastasis via EMT, underscoring its clinical relevance as a potential prognostic biomarker. Our study lays the groundwork for the development of targeted therapies aimed at mitigating the deleterious effect of A3A-driven EMT in HGSOC.
Authors
Jessica M. Devenport, Thi Tran, Brooke R. Harris, Dylan Fingerman, Rachel A. DeWeerd, Lojain H. Elkhidir, Danielle LaVigne, Katherine Fuh, Lulu Sun, Jeffrey J. Bednarski, Ronny Drapkin, Mary M. Mullen, Abby M. Green
×Abstract
Infectious complications (ICs) in acute pancreatitis (AP) are primarily driven by intestinal bacterial translocation, significantly increasing mortality and hospital stays. Despite this, the role of the gut microenvironment, particularly its metabolic aspects, in AP remains poorly understood. In this study, we investigated a cohort of patients with AP, and conducted supplemental murine studies, to explore the relationship between the gut metabolome and the development of ICs. Metabolomic analysis revealed that disruptions in gut tryptophan metabolism — especially reductions in serotonin and indole pathways — are key features associated with IC occurrence. Additionally, elevated plasma levels of tryptophan metabolites within the kynurenine pathway were identified as valuable predictive biomarkers for ICs. Mechanistic studies in murine models demonstrated that an impaired intestinal Th17 response, modulated by these tryptophan metabolites, plays a critical role in IC development. Serotonin supplementation enhanced Th17 responses, reducing IC incidence, while administration of kynurenic acid, a kynurenine metabolite, exacerbated pancreatic infections, potentially through immunosuppressive effects. These findings highlight the pivotal role of tryptophan metabolites in AP pathogenesis, emphasizing their potential as both predictive markers and therapeutic targets in IC management.
Authors
Daosheng Wang, Silei Sun, Qianli Zhao, Bing Zhao, Li Ma, Tongxuan Su, Lili Xu, Menglu Gui, Dan Xu, Wei Chen, Yu Zeng, Yining Shen, Yiyue Liu, Cen Jiang, Qi Ni, Yingchao Cui, Yide Lu, Qiuya Lu, Danfeng Dong, Yibing Peng, Enqiang Mao
Thitinee Vanichapol, … , Alan J. Davidson, Mark P. de Caestecker Published January 23, 2025
Citation Information: JCI Insight. 2025;10(5):e187008. https://doi.org/10.1172/jci.insight.187008.
×Abstract
Urinary obstruction causes injury to the renal medulla, impairing the ability to concentrate urine and increasing the risk of progressive kidney disease. However, the regenerative capacity of the renal medulla after reversal of obstruction is poorly understood. To investigate this, we developed a mouse model of reversible urinary obstruction. Despite robust regeneration and complete histological recovery of the renal medulla, these mice exhibited a permanent defect in urinary concentrating capacity. However, there were lasting changes in the composition, organization, and transcriptional profiles of epithelial, endothelial, and interstitial cells. Persistent inflammatory responses were also seen in patients with renal stone disease, but there were also adaptive responses to the increasingly hypoxic environment of the renal medulla that occurred only after reversal of obstruction. These findings indicate that while partial repair occurs after reversal of urinary obstruction, there are lasting structural and functional changes across all major cellular compartments of the renal medulla. These changes reflect shared and distinct responses to different renal medullary injuries in humans and mice.
Authors
Thitinee Vanichapol, Alex Gonzalez, Rachel Delgado, Maya Brewer, Kelly A. Clouthier, Anna A. Menshikh, William E. Snyder, Teebro Rahman, Veronika Sander, Haichun Yang, Alan J. Davidson, Mark P. de Caestecker
×Abstract
Idiopathic pulmonary fibrosis (IPF) causes remodeling of the distal lung. Pulmonary remodeling is histologically characterized by fibrosis, as well as appearance of basal cells; however, the involvement of basal cells in IPF remains unclear. Here, we focus on the long noncoding RNA MIR205HG, which is highly expressed in basal cells, using RNA sequencing. Through RNA sequencing of genetic manipulations using primary cells and organoids, we discovered that MIR205HG regulates IL-33 expression. Mechanistically, the AluJb element of MIR205HG plays a key role in IL-33 expression. Additionally, we identified a small molecule that targets the AluJb element, leading to decreased IL-33 expression. IL-33 is known to induce type 2 innate lymphoid cells (ILC2s), and we observed that MIR205HG expression was positively correlated with the number of ILC2s in patients with IPF. Collectively, these findings provide insights into the mechanisms by which basal cells contribute to IPF and suggest potential therapeutic targets.
Authors
Tsuyoshi Takashima, Chao Zeng, Eitaro Murakami, Naoko Fujiwara, Masaharu Kohara, Hideki Nagata, Zhaozu Feng, Ayako Sugai, Yasue Harada, Rika Ichijo, Daisuke Okuzaki, Satoshi Nojima, Takahiro Matsui, Yasushi Shintani, Gota Kawai, Michiaki Hamada, Tetsuro Hirose, Kazuhiko Nakatani, Eiichi Morii
Caitlin J. Bowen, … , Elena Gallo MacFarlane, Harry C. Dietz Published January 21, 2025
Citation Information: JCI Insight. 2025;10(5):e187315. https://doi.org/10.1172/jci.insight.187315.
×Abstract
Aortic dissection or rupture is a major cause of mortality in vascular Ehlers-Danlos syndrome (vEDS), a connective tissue disorder caused by heterozygous mutations in the collagen type III alpha 1 chain (COL3A1) gene. C57BL6/J (BL6) mice carrying the Col3a1G938D/+ mutation recapitulate the vEDS vascular phenotype and die suddenly of aortic rupture/dissection. However, 129S6/SvEvTac (referred to here as 129) mice expressing the same Col3a1G938D/+ mutation show near-complete lifelong protection from vascular rupture. To identify genetic modifiers of vascular risk in vEDS, we performed genome-wide genotyping of intercrossed BL6/129 vEDS mice stratified by survival and identified a significant protective locus encompassing a variant in Map2k6, encoding mitogen-activated protein kinase kinase 6 (M2K6), a p38-activating kinase. Genetic ablation of Map2k6 rendered previously protected 129 vEDS mice susceptible to aortic rupture, in association with reduced protein phosphatase 1 activity and increased PKC and ERK phosphorylation. Accelerated vascular rupture in vEDS mice treated with a pharmacological inhibitor of p38 was rescued by concomitant ERK antagonism, supporting an opposing role for ERK and p38 in the modification of aortic rupture risk in vEDS. These results suggest that pharmacologic strategies aimed at mimicking the effect of this natural protective pathway may attenuate aortic rupture risk in vEDS.
Authors
Caitlin J. Bowen, Rebecca Sorber, Juan Francisco Calderón Giadrosic, Jefferson J. Doyle, Graham Rykiel, Zachary Burger, Xiaoyan Zhang, Wendy A. Espinoza Camejo, Nicole Anderson, Simone Sabnis, Chiara Bellini, Elena Gallo MacFarlane, Harry C. Dietz
Meiricris Tomaz da Silva, … , Aniket S. Joshi, Ashok Kumar Published January 28, 2025
Citation Information: JCI Insight. 2025;10(5):e187825. https://doi.org/10.1172/jci.insight.187825.
×Abstract
Skeletal muscle regeneration in adults is predominantly driven by satellite cells. Loss of satellite cell pool and function leads to skeletal muscle wasting in many conditions and disease states. Here, we demonstrate that the levels of fibroblast growth factor–inducible 14 (Fn14) were increased in satellite cells after muscle injury. Conditional ablation of Fn14 in Pax7-expressing satellite cells drastically reduced their expansion and skeletal muscle regeneration following injury. Fn14 was required for satellite cell self-renewal and proliferation as well as to prevent precocious differentiation. Targeted deletion of Fn14 inhibited Notch signaling but led to the spurious activation of STAT3 signaling in regenerating skeletal muscle and in cultured muscle progenitor cells. Silencing of STAT3 improved proliferation and inhibited premature differentiation of Fn14-deficient satellite cells. Furthermore, conditional ablation of Fn14 in satellite cells exacerbated myopathy in the mdx mouse model of Duchenne muscular dystrophy (DMD), whereas its overexpression improved the engraftment of exogenous muscle progenitor cells into the dystrophic muscle of mdx mice. Altogether, our study highlights the crucial role of Fn14 in the regulation of satellite cell fate and function and suggests that Fn14 can be a potential molecular target to improve muscle regeneration in muscular disorders.
Authors
Meiricris Tomaz da Silva, Aniket S. Joshi, Ashok Kumar
×Abstract
Elevation of intraocular pressure (IOP) due to trabecular meshwork (TM) dysfunction, leading to neurodegeneration, is the pathological hallmark of primary open-angle glaucoma (POAG). Impaired axonal transport is an early and critical feature of glaucomatous neurodegeneration. However, a robust mouse model that accurately replicates these human POAG features has been lacking. We report the development and characterization of a new Cre-inducible mouse model expressing a DsRed-tagged Y437H mutant of human myocilin (Tg.CreMYOCY437H). A single intravitreal injection of HAd5-Cre induced selective MYOC expression in the TM, causing TM dysfunction, reducing the outflow facility, and progressively elevating IOP in Tg.CreMYOCY437H mice. Sustained IOP elevation resulted in significant loss of retinal ganglion cells (RGCs) and progressive axonal degeneration in Cre-induced Tg.CreMYOCY437H mice. Notably, impaired anterograde axonal transport was observed at the optic nerve head before RGC degeneration, independent of age, indicating that impaired axonal transport contributes to RGC degeneration in Tg.CreMYOCY437H mice. In contrast, axonal transport remained intact in ocular hypertensive mice injected with microbeads, despite significant RGC loss. Our findings indicate that Cre-inducible Tg.CreMYOCY437H mice replicate all glaucoma phenotypes, providing an ideal model for studying early events of TM dysfunction and neuronal loss in POAG.
Authors
Balasankara Reddy Kaipa, Ramesh Kasetti, Yogapriya Sundaresan, Linya Li, Sam Yacoub, J. Cameron Millar, William Cho, Dorota Skowronska-Krawczyk, Prabhavathi Maddineni, Krzysztof Palczewski, Gulab S. Zode
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Abstract
Mitogen-activated protein kinase 8 interacting protein 3 (MAPK8IP3/JIP3) is a member of the kinesin family known to play a role in axonal transport of cargo. Mutations in the gene have been linked to severe neurodevelopmental disorders, resulting in developmental delay, intellectual disability, ataxia, tremor, autism, seizures, and visual impairment. A patient who has a missense mutation in the MAPK8IP3 gene (c. 1714 C>T, Arg578Cys) (R578C) manifests dystonia, gross motor delay and developmental delay. Here we show that the mutation is a toxic gain of function mutation which alters the interactome of JIP3, disrupts axonal transport of late endosomes, increases signaling via c-Jun N-terminal kinase (JNK), resulting in apoptosis, and disrupts the dopamine receptor 1 (D1) signaling while not affecting the dopamine receptor 2 (D2) signaling. Further, in the presence of the mutant protein, we show that 80% reduction of mutant JIP3>80% and 60% reduction of wild-type JIP3 by non-allele selective phosphorothioate (PS)-modified antisense oligonucleotides (ASOs) is well tolerated by several types of cells in vitro. Our study identifies several important new roles for JIP3 and provides important insights for therapeutic approaches, including antisense oligonucleotide reduction of JIP3.
Authors
Wei Zhang, Swapnil Mittal, Ria Thomas, Anahid Foroughishafiei, Ricardo Nunes Bastos, Wendy K. Chung, Konstantina Skourti-Stathaki, Stanley T. Crooke
Abstract
Inflammation is a critical pathological process in myocardial infarction. Although immunosuppressive therapies can mitigate inflammatory responses and improve outcomes in myocardial infarction, they also increase the risk of infections. Identifying novel regulators of local cardiac inflammation could provide safer therapeutic targets for myocardial ischemia/reperfusion injury. In this study, we identified a previously unknown micropeptide, which we named Inflammation Associated MicroPeptide (IAMP). IAMP is predominantly expressed in cardiac fibroblasts, and its expression is closely associated with cardiac inflammation. Down-regulation of IAMP promotes, whereas its overexpression prevents, the transformation of cardiac fibroblasts into a more inflammatory phenotype under stressed/stimulated conditions, as evidenced by changes in the expression and secretion of pro-inflammatory cytokines. Consequently, loss of IAMP function leads to uncontrolled inflammation and worsens cardiac injury following ischemia/reperfusion surgery. Mechanistically, IAMP promotes the degradation of HIF-1α by interacting with its stabilizing partner HSP90, and thus suppresses the transcription of pro-inflammatory genes downstream of HIF-1α. This study underscores the significance of fibroblast-mediated inflammation in cardiac ischemia/reperfusion injury and highlights the therapeutic potential of targeting micropeptides for myocardial infarction.
Authors
Youchen Yan, Tingting Zhang, Xin He, Tailai Du, Gang Dai, Xingfeng Xu, Zhuohui chen, Jialing Wu, Huimin Zhou, Yazhi Peng, Yan Li, Chen Liu, Xinxue Liao, Yugang Dong, Jing-song Ou, Zhan-Peng Huang
Abstract
BACKGROUND. Alterations in circulating metabolites have been described in obese metabolic dysfunction-associated steatotic liver disease (MASLD), but data on lean MASLD are lacking. We investigated serum metabolites, including microbial bile acids (BAs) and short-chain fatty acids (SCFAs), and their association with lean and obese MASLD. METHODS. Serum samples from 204 subjects of European descent were allocated to four groups: lean healthy (n=61), lean MASLD (n=49), obese healthy (n=47) and obese MASLD (n=47). LC/MS-based metabolomics was performed followed by linear model analysis. MASLD prediction was assessed based on LASSO regression. Functional effects of significantly altered molecules were confirmed in organotypic 3D primary human liver cultures. RESULTS. Lean MASLD was characterized by elevated isobutyrate, along with higher methionine sulfoxide, propionate and phosphatidylcholines. Patients with obese MASLD had increased sarcosine and decreased lysine and asymmetric dimethylarginine. Using metabolites, sex and body mass index, MASLD vs. healthy could be predicted with a median AUC of 86.5% and 85.6% in the lean and obese subgroups, respectively. Functional experiments in organotypic 3D primary human liver cultures showed that propionate and isobutyrate induced lipid accumulation and altered expression of genes involved in lipid and glucose metabolism. CONCLUSION. Our results indicate that lean MASLD is characterized by a distinct metabolite pattern related to amino acid metabolism, lipids and SCFAs, while metabolic pathways of lipid accumulation are differentially activated by microbial metabolites. Our findings highlight an important role of microbial metabolites in MASLD pathogenesis, with implications for the predictive and mechanistic assessment of liver disease across different weight categories. FUNDING. The work received funding from the Robert Bosch Stiftung, Stuttgart, Germany, the Swedish Research Council [grant numbers 2021-02801, 2023-03015 and 2024-03401], the ERC Consolidator Grant 3DMASH [101170408], Ruth and Richard Julin Foundation for Gastroenterology [grant number 2021-00158], the SciLifeLab and Wallenberg National Program for Data-Driven Life Science [WASPDDLS22:006], and the Novo Nordisk Foundation [NNF23OC0085944 and NNF23OC0084420]. JT was supported by PMU-FFF [grant number E-18/28/148-FEL].
Authors
Mathias Haag, Stefan Winter, Aurino M. Kemas, Julia Tevini, Alexandra Feldman, Sebastian K. Eder, Thomas K. Felder, Christian Datz, Bernhard Paulweber, Gerhard Liebisch, Oliver Burk, Volker M. Lauschke, Elmar Aigner, Matthias Schwab
Abstract
Urinary tract infections (UTIs) are one of the most commonly encountered infections in clinical practice, in which psychological stress is a critical pathological contributor to modulate immune function. However, mechanistic pathways linking stress networks in the brain to bladder infection remain poorly understood. In this study, we discovered that acute stress treatment suppressed bladder inflammation in mice with UTIs, and a significant number of neurons showing overlap between inflammation-associated markers and retrograde labeling were observed in the paraventricular nucleus (PVN) brain region of these mice. Activation of PVN alleviated UPEC-induced bladder inflammatory response. Moreover, blocked hypothalamic-pituitary-adrenal (HPA) axis reversed the anti-inflammatory reflex mediated by acute stress, suggesting that the potential of glucocorticoids levels through the brain-body circuits to ameliorate UTIs. Single cell-RNAseq of bladder immune cells revealed that type 2 innate lymphoid cells (ILC2) expressed abundant levels of glucocorticoid receptor (GR). The activation of PVN effectively inhibited the expression of the proinflammatory cytokine Csf2 by ILC2 through direct regulation of cell-intrinsic glucocorticoids signaling. Ultimately, our study has implications for the positioning of brain-body circuit for UTIs treatment.
Authors
Yaxiao Liu, Jinhua Wang, Junyang Lin, Dingqi Sun, Kejia Zhu, Tongxiang Diao, Qiang Fu, Qingyu Ren
Abstract
Skin inflammation in juvenile dermatomyositis (JDM) can signal disease onset or flare, and the persistence of cutaneous disease can prevent complete disease remission. The non-invasive study of cutaneous expression signatures through tape stripping (TS) holds the potential to reveal mechanisms underlying disease heterogeneity and organ-specific inflammation. The objectives of this study were to 1) define TS expression signatures in lesional and non-lesional JDM skin, 2) analyze TS signatures to identify JDM disease endotypes and 3) compare TS and blood signatures. While JDM lesional skin demonstrated interferon signaling as the top upregulated pathway, non-lesional skin uniquely highlighted pathways involved in metabolism, angiogenesis and calcium signaling. Both lesional and non-lesional skin shared inflammasome pathway dysregulation. Using unsupervised clustering of skin expression data, we identified a treatment-refractory JDM subgroup distinguished by upregulation of genes associated with mitochondrial dysfunction. The treatment-refractory JDM subgroup also demonstrated higher interferon, angiogenesis and innate immune expression scores in skin and blood, although scores were more pronounced in skin as compared to blood. Tape-stripping expression signatures in JDM provided insight into disease mechanisms and molecular subgroups. Skin, as compared to blood, transcriptional profiles served as more sensitive markers to classify disease subgroups and identify candidate treatment targets.
Authors
Jessica L. Turnier, Sarah M.H. Vandenbergen, Madison E. McClune, Christine Goudsmit, Sophia Matossian, Meredith Riebschleger, Nadine Saad, Jacqueline A. Madison, Smriti Mohan, Johann E. Gudjonsson, Lam C. Tsoi, Celine C. Berthier, J. Michelle Kahlenberg
