Granulosa cell tumors (GCT) are rare ovarian malignancies. Due to the lack of effective treatment in late relapse, there is a clear unmet need for novel therapies. Forkhead Box L2 (FOXL2) is a protein mainly expressed in granulosa cells (GC) and therefore is a rational therapeutic target. Since we identified tumor infiltrating lymphocytes (TILs) as the main immune population within GCT, TILs from 11 GCT patients were expanded, and their phenotypes were interrogated to determine that T cells acquired late antigen-experienced phenotypes and lower levels of PD1 expression. Importantly, TILs maintained their functionality after ex vivo expansion as they vigorously reacted against autologous tumors (100% of patients) and against FOXL2 peptides (57.1% of patients). To validate the relevance of FOXL2 as a target for immune therapy, we developed a plasmid DNA vaccine (FoxL2–tetanus toxin; FoxL2-TT) by fusing Foxl2 cDNA with the immune-enhancing domain of TT. Mice immunization with FoxL2-TT controlled growth of FOXL2-expressing ovarian (BR5) and breast (4T1) cancers in a T cell–mediated manner. Combination of anti–PD-L1 with FoxL2-TT vaccination further reduced tumor progression and improved mouse survival without affecting the female reproductive system and pregnancy. Together, our results suggest that FOXL2 immune targeting can produce substantial long-term clinical benefits. Our study can serve as a foundation for trials testing immunotherapeutic approaches in patients with ovarian GCT.
Stefano Pierini, Janos L. Tanyi, Fiona Simpkins, Erin George, Mireia Uribe-Herranz, Ronny Drapkin, Robert Burger, Mark A. Morgan, Andrea Facciabene
New strategies are needed to enhance the efficacy of anti-programmed cell death protein (PD-1) antibody (Ab) in cancer. Here, we report that inhibiting palmitoyl-protein thioesterase 1 (PPT1), a target of CQ derivatives like hydroxychloroquine (HCQ), enhances the antitumor efficacy of anti-PD-1 Ab in melanoma. The combination resulted tumor growth impairment and improved survival in mouse models. Genetic suppression of core autophagy genes, but not Ppt1, in cancer cells reduced priming and cytotoxic capacity of primed T cells. Exposure of antigen primed T cells to macrophage conditioned medium derived from macrophages treated with PPT1 inhibitors enhanced melanoma specific killing. Genetic or chemical PPT1 inhibition resulted an M2 to M1 phenotype switching in macrophages. The combination was associated with a reduction in myeloid-derived suppressor cells (MDSCs) in the tumor. Ppt1 inhibition by HCQ, or DC661, induced cyclic GMP-AMP synthase (cGAS), stimulator of interferon genes (STING), tank-binding kinase 1 (TBK1) pathway activation and the secretion of interferon β (IFN-β) in macrophages which was a key component for augmented T cell-mediated cytotoxicity. Genetic Ppt1 inhibition produced similar findings. These data provide the rationale for a melanoma clinical trial testing this new immunotherapy combination and may also be effective in other cancers.
Gaurav Sharma, Rani Ojha, Estela Noguera-Ortega, Vito W. Rebecca, John Attanasio, Shujing Liu, Shengfu Piao, Jennifer J. Lee, Michael C. Nicastri, Sandra L. Harper, Amruta Ronghe, Vaibhav Jain, Jeffrey D. Winkler, David W. Speicher, Jerome Mastio, Phyllis A Gimotty, Xiaowei Xu, E. John Wherry, Dmitry I. Gabrilovich, Ravi K. Amaravadi
Establishing the interactome of the cancer associated stress protein NUPR1 (NUclear PRotein 1), we found that it binds to several hundreds of proteins, including proteins involved in nuclear translocation, DNA repair and key factors of the SUMO pathway. We demonstrated that the NUPR1 inhibitor ZZW-115, an organic synthetic molecule, competes with importins for the binding to the NLS region of NUPR1 thereby inhibiting its nuclear translocation. We hypothesized, and then proved, that inhibition of NUPR1 by ZZW-115 sensitizes cancer cells to DNA damage induced by several genotoxic agents. Strikingly, we found that treatment with ZZW-115 reduced SUMOylation of several proteins involved in DNA damage response (DDR). We further reported that the presence of recombinant NUPR1 improved the SUMOylation in a cell-free system indicating NUPR1 directly stimulates the SUMOylation machinery. We propose that ZZW-115 sensitizes cancer cells to genotoxic agents by inhibiting the nuclear translocation of NUPR1 and thereby decreasing the SUMOylation dependent functions of key proteins involved in the DDR.
Wenjun Lan, Patricia Santofimia-Castaño, Mirna Swayden, Yi Xia, Zhengwei Zhou, Stephane Audebert, Luc Camoin, Can Huang, Ling Peng, Ana Jiménez-Alesanco, Adrián Velázquez-Campoy, Olga Abian, Gwen Lomberk, Raul Urrutia, Bruno Rizzuti, Vincent Geli, Philippe Soubeyran, Jose Luis Neira, Juan L. Iovanna
A tumor blood vessel is a key regulator of tissue perfusion, immune cell trafficking, cancer metastasis, and therapeutic responsiveness. mTORC1 is a signaling node downstream of multiple angiogenic factors in the endothelium. However, mTORC1 inhibitors have limited efficacy in most solid tumors, in part due to inhibition of immune function at high doses used in oncology patients and compensatory PI3K signaling triggered by mTORC1 inhibition in tumor cells. Here we show that low-dose RAD001/everolimus, an mTORC1 inhibitor, selectively targets mTORC1 signaling in endothelial cells (ECs) without affecting tumor cells or immune cells, resulting in tumor vessel normalization and increased antitumor immunity. Notably, this phenotype was recapitulated upon targeted inducible gene ablation of the mTORC1 component Raptor in tumor ECs (RaptorECKO). Tumors grown in RaptorECKO mice displayed a robust increase in tumor-infiltrating lymphocytes due to GM-CSF–mediated activation of CD103+ dendritic cells and displayed decreased tumor growth and metastasis. GM-CSF neutralization restored tumor growth and metastasis, as did T cell depletion. Importantly, analyses of human tumor data sets support our animal studies. Collectively, these findings demonstrate that endothelial mTORC1 is an actionable target for tumor vessel normalization, which could be leveraged to enhance antitumor immune therapies.
Shan Wang, Ariel Raybuck, Eileen Shiuan, Sung Hoon Cho, Qingfei Wang, Dana M. Brantley-Sieders, Deanna Edwards, Margaret M. Allaman, James Nathan, Keith T. Wilson, David DeNardo, Siyuan Zhang, Rebecca Cook, Mark Boothby, Jin Chen
Platinum-based chemotherapy in combination with immune-checkpoint inhibitors is the current standard of care for patients with advanced lung adenocarcinoma (LUAD). However, tumor progression evolves in most cases. Therefore, predictive biomarkers are needed for better patient stratification and for the identification of new therapeutic strategies, including enhancing the efficacy of chemotoxic agents. Here, we hypothesized that discoidin domain receptor 1 (DDR1) may be both a predictive factor for chemoresistance in patients with LUAD and a potential target positively selected in resistant cells. By using biopsies from patients with LUAD, KRAS-mutant LUAD cell lines, and in vivo genetically engineered KRAS-driven mouse models, we evaluated the role of DDR1 in the context of chemotherapy treatment. We found that DDR1 is upregulated during chemotherapy both in vitro and in vivo. Moreover, analysis of a cohort of patients with LUAD suggested that high DDR1 levels in pretreatment biopsies correlated with poor response to chemotherapy. Additionally, we showed that combining DDR1 inhibition with chemotherapy prompted a synergistic therapeutic effect and enhanced cell death of KRAS-mutant tumors in vivo. Collectively, this study suggests a potential role for DDR1 as both a predictive and prognostic biomarker, potentially improving the chemotherapy response of patients with LUAD.
Marie-Julie Nokin, Elodie Darbo, Camille Travert, Benjamin Drogat, Aurélie Lacouture, Sonia San José, Nuria Cabrera, Béatrice Turcq, Valérie Prouzet-Mauleon, Mattia Falcone, Alberto Villanueva, Haiyun Wang, Michael Herfs, Miguel Mosteiro, Pasi A. Jänne, Jean-Louis Pujol, Antonio Maraver, Mariano Barbacid, Ernest Nadal, David Santamaría, Chiara Ambrogio
Purpose: There is a rapidly evolving portfolio of immune therapeutic modulators, but the relative incidence of immune targets in human gliomas is unknown. In order to prioritize available immune therapeutics, immune profiling across glioma grades was conducted followed by preclinical determinations of therapeutic effect in immune competent mice harboring gliomas. Methods: CD4+ and CD8+ T cells and CD11b+ myeloid cells were isolated from the blood of healthy donors and the blood and tumors of newly diagnosed and recurrent glioma patients and profiled for the expression of immune modulatory targets with an available therapeutic. Preclinical murine models of glioma were used to assess therapeutic efficacy of agents targeting the most frequently expressed immune targets. Immune effector function was analyzed in the setting of glioma induced immune suppression. Results: In glioma patients, the adenosine-CD73-CD39 immune suppressive pathway was most frequently expressed, followed by PD-1. CD73 expression was upregulated on immune cells by 2-hydroxygluterate in IDH1 mutant glioma patients. In multiple murine glioma models, including those that express CD73, adenosine receptor inhibitors demonstrated a modest therapeutic response; however, the addition of other inhibitors of the adenosine pathway did not further enhance this therapeutic effect. Although adenosine receptor inhibitors could recover immunological effector functions in T cells after the engagement of this pathway, immune recovery was impaired in the presence of gliomas, indicating that irreversible immune exhaustion limits the effectiveness of inhibitors of the adenosine pathway in glioma patients. Conclusions: This study illustrates vetting steps that should be considered prior to clinical trial implementation for immunotherapy resistant cancers including testing an agents ability to restore immunological function in the context of intended use.
Martina Ott, Karl-Heinz Tomaszowski, Anantha Marisetty, Ling-Yuan Kong, Jun Wei, Maya Duna, Katia Blumberg, Xiaorong Ji, Carmen B Jacobs, Gregory N. Fuller, Lauren A. Langford, Jason T. Huse, James P. Long, Jian Hu, Shulin Li, Jeffrey S. Weinberg, Sujit Prabhu, Raymond Sawaya, Sherise D. Ferguson, Ganesh Rao, Frederick F. Lang, Michael A. Curran, Amy B. Heimberger
Aromatase inhibitors (AIs) reduce breast cancer recurrence and prolong survival, but up to 30% of patients exhibit recurrence. Using a genome-wide association study of patients entered on MA.27, a phase III randomized trial of anastrozole vs exemestane, we identified a SNP in CUB And Sushi Multiple Domains 1 (CSMD1) associated with breast cancer free interval, with the variant allele associated with fewer distant recurrences. Mechanistically, CSMD1 regulates CYP19 expression in a SNP-, and drug-dependent fashion and this regulation is different among three AIs, anastrozole, exemestane, and letrozole. Overexpression of CSMD1 sensitized AI-resistant cells to anastrozole but not to the other two AIs. The SNP in CSMD1 that was associated with increased CSMD1 and CYP19 expression levels increased anastrozole sensitivity, but not letrozole or exemestane sensitivity. Anastrozole degrades estrogen receptor α (ERα), especially in the presence of estradiol (E2). ER positive breast cancer organoids and AI- or fulvestrant-resistant breast cancer cells were more sensitive to anastrozole plus E2 than to AI alone. Our findings suggest that the CSMD1 SNP might help to predict AI response and anastrozole plus E2 serves as a potential new therapeutic strategy for patients with AI- or fulvestrant-resistant breast cancers.
Junmei Cairns, James N. Ingle, Tanda T. M. Dudenkov, Krishna R. Kalari, Erin E. Carlson, Jie Na, Aman U. Buzdar, Mark E. Robson, Matthew J. Ellis, Paul E. Goss, Lois E. Shepherd, Barbara Goodnature, Matthew P. Goetz, Richard M. Weinshilboum, Hu Li, Mehrab Ghanat Bari, Liewei Wang
Cancer is instigated by mutator phenotypes, including deficient mismatch repair and p53-associated chromosomal instability. More recently, a distinct class of cancers was identified with unusually high mutational loads due to heterozygous amino acid substitutions (most commonly P286R) in the proofreading domain of DNA polymerase ε, the leading strand replicase encoded by POLE. Immunotherapy has revolutionized cancer treatment, but new model systems are needed to recapitulate high mutational burdens characterizing human cancers and permit study of mechanisms underlying clinical responses. Here, we show that activation of a conditional LSL-PoleP286R allele in endometrium is sufficient to elicit in all animals endometrial cancers closely resembling their human counterparts, including very high mutational burden. Diverse investigations uncovered potentially novel aspects of Pole-driven tumorigenesis, including secondary p53 mutations associated with tetraploidy, and cooperation with defective mismatch repair through inactivation of Msh2. Most significantly, there were robust antitumor immune responses with increased T cell infiltrates, accelerated tumor growth following T cell depletion, and unfailing clinical regression following immune checkpoint therapy. This model predicts that human POLE-driven cancers will prove consistently responsive to immune checkpoint blockade. Furthermore, this is a robust and efficient approach to recapitulate in mice the high mutational burdens and immune responses characterizing human cancers.
Hao-Dong Li, Changzheng Lu, He Zhang, Qing Hu, Junqiu Zhang, Ileana C. Cuevas, Subhransu S. Sahoo, Mitzi Aguilar, Elizabeth G. Maurais, Shanrong Zhang, Xiaojing Wang, Esra A. Akbay, Guo-Min Li, Bo Li, Prasad Koduru, Peter Ly, Yang-Xin Fu, Diego H. Castrillon
Pancreatic ductal adenocarcinoma (PDAC) is characterized by a relative paucity of cancer cells that are surrounded by an abundance of non-tumor cells and extracellular matrix, known as stroma. The interaction between stroma and cancer cells contributes to poor outcome, but how proteins from these individual compartments drive aggressive tumor behavior is not known. Here, we report the proteomic analysis of laser-capture microdissected (LCM) PDAC samples. We isolated stroma, tumor, and bulk samples from a cohort with long- and short-term survivors. Compartment-specific proteins were measured by mass spectrometry, yielding the largest PDAC proteome landscape to date. These analyses revealed that in bulk analysis, tumor-derived proteins were typically masked and that LCM was required to reveal biology and novel prognostic markers. We validated tumor CALB2 and stromal COL11A1 expression as compartment-specific prognostic markers. We identified and functionally addressed the contributions of the tumor cell receptor EPHA2 to tumor cell viability and motility, underscoring the value of compartment-specific protein analysis in PDAC.
Tessa Y.S. Le Large, G. Mantini, Laura L. Meijer, T.V. Pham, N. Funel, Nicole C.T. van Grieken, B. Kok, Jaco C. Knol, H.W.M. van Laarhoven, S.R. Piersma, C.R. Jimenez, G. Kazemier, E. Giovannetti, M.F. Bijlsma
Triple-negative breast cancers (TNBCs) are highly heterogeneous and aggressive, with high mortality rates. Although TNBC is typically more responsive to chemotherapy than other breast cancer subtypes, many patients develop chemo-resistance. The molecular processes contributing to chemo-resistance, and the roles of tumor cell-stromal crosstalk in establishing chemo-resistance are complex and largely unclear. Here we report molecular studies of paired TNBC patient-derived xenografts (PDX) established from patient biopsies before and after the development of chemo-resistance. Interestingly, the chemo-resistant model acquired a distinct KRASQ61R mutation that activates K-Ras. The chemo-resistant KRAS-mutant model showed gene expression and proteomic changes indicative of altered tumor cell metabolism. Specifically, KRAS-mutant PDXs exhibit increased redox ratios and decreased activation of AMPK, a protein involved in responding to metabolic homeostasis. Additionally, the chemo-resistant model exhibited increased immunosuppression including expression of CXCL1 and CXCL2, cytokines responsible for recruiting immunosuppressive leukocytes to tumors. Notably, chemo-resistant KRAS-mutant tumors harbored increased numbers of granulocytic myeloid-derived suppressor cells (gMDSCs). Interestingly, previously established gene expression signatures of Ras/MAPK activity correlated with myeloid/neutrophil-recruiting CXCL1/2 expression and negatively with T-cell recruiting chemokines (CXCL9/10/11) across TNBC patients, even in the absence of KRAS mutations. Importantly, MEK inhibition induced tumor suppression in mice while simultaneously reversing metabolic and immunosuppressive phenotypes including chemokine production and gMDSC tumor recruitment in the chemo-resistant KRAS mutant tumors. These results suggest that Ras/MAPK pathway inhibitors may be effective in some breast cancer patients to reverse Ras/MAPK-driven tumor metabolism and immunosuppression, particularly in the setting of chemo-resistance.
Derek A. Franklin, Joe T. Sharick, Paula I. Gonzalez-Ericsson, Violeta Sanchez, Phillip Dean, Susan R. Opalenik, Stefano Cairo, Jean-Gabriel Judde, Michael T. Lewis, Jenny C. Chang, Melinda E. Sanders, Rebecca S. Cook, Melissa C. Skala, Jennifer Bordeaux, Jehovana Orozco Bender, Christine A. Vaupel, Gary Geiss, Douglas Hinerfeld, Justin M. Balko
No posts were found with this tag.