Corticotropin-releasing Factor Receptor 2 Mediates Sex-Specific Cellular Stress Responses
| Autor: | Aditi Bhargava, Eileen F. Grady, Peter T. Ohara, Larry Ackerman, Min Liao, Eric Kubat, Shilpi Mahajan |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Male
medicine.medical_specialty Necrosis Corticotropin-Releasing Hormone Transgene Immunology Mice Transgenic Inflammation Acinar Cells Biology Receptors Corticotropin-Releasing Hormone Transgenic Cell Line Medicinal and Biomolecular Chemistry Mice Sex Factors Internal medicine Cellular stress response Receptors Genetics medicine Acinar cell 2.1 Biological and endogenous factors Animals Aetiology Receptor Molecular Biology Urocortins Genetics (clinical) Ceruletide Endoplasmic reticulum Articles Endoplasmic Reticulum Stress Endocrinology Pancreatitis Amylases Molecular Medicine Female Biochemistry and Cell Biology medicine.symptom Digestive Diseases |
| Zdroj: | Molecular medicine (Cambridge, Mass.), vol 19, iss 1 |
| ISSN: | 1528-3658 1076-1551 |
| DOI: | 10.2119/molmed.2013.00036 |
| Popis: | Although females suffer twice as much as males from stress-related disorders, sex-specific participating and pathogenic cellular stress mechanisms remain uncharacterized. Using corticotropin-releasing factor receptor 2-deficient (Crhr2−/−) and wild-type (WT) mice, we show that CRF receptor type 2 (CRF2) and its high-affinity ligand, urocortin 1 (Ucn1), are key mediators of the endoplasmic reticulum (ER) stress response in a murine model of acute pancreatic inflammation. Ucn1 was expressed de novo in acinar cells of male, but not female WT mice during acute inflammation. Upon insult, acinar Ucn1 induction was markedly attenuated in male but not female Crhr2r−/− mice. Crhr2−/− mice of both sexes show exacerbated acinar cell inflammation and necrosis. Electron microscopy showed mild ER damage in WT male mice and markedly distorted ER structure in Crhr2−/− male mice during pancreatitis. WT and Crhr2−/− female mice showed similarly distorted ER ultrastructure that was less severe than distortion seen in Crhr2−/− male mice. Damage in ER structure was accompanied by increased ubiquitination, peIF2, and mis-targeted localization of vimentin in WT mice that was further exacerbated in Crhr2−/− mice of both sexes during pancreatitis. Exogenous Ucn1 rescued many aspects of histological damage and cellular stress response, including restoration of ER structure in male WT and Crhr2−/− mice, but not in females. Instead, females often showed increased damage. Thus, specific cellular pathways involved in coping and resolution seem to be distinct to each sex. Our results demonstrate the importance of identifying sex-specific pathogenic mechanisms and their value in designing effective therapeutics. |
| Databáze: | OpenAIRE |
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