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Abstract
Vasopressin has traditionally been thought to be produced by the neurohypophyseal system and then released into the circulation where it regulates water homeostasis. The questions of whether vasopressin could be produced outside of the brain and if the kidney could be a source of vasopressin are raised by the syndrome of inappropriate antidiuretic hormone secretion (vasopressin). We found that mouse and human kidneys expressed vasopressin mRNA. Using an antibody that detects preprovasopressin, we found that immunoreactive preprovasopressin protein was found in mouse and human kidneys. Moreover, we found that murine collecting duct cells made biologically active vasopressin, which increased in response to NaCl-mediated hypertonicity, and that water restriction increased the abundance of kidney-derived vasopressin mRNA and protein expression in mouse kidneys. Thus, we provide evidence of biologically active production of kidney-derived vasopressin in kidney tubular epithelial cells.
Authors
Juan Pablo Arroyo, Andrew S. Terker, Yvonne Zuchowski, Jason A. Watts, Fabian Bock, Cameron Meyer, Wentian Luo, Meghan E. Kapp, Edward R. Gould, Adam X. Miranda, Joshua Carty, Ming Jiang, Roberto M. Vanacore, Elizabeth Hammock, Matthew H. Wilson, Roy Zent, Mingzhi Zhang, Gautam Bhave, Raymond C. Harris
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