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Zhou S, Wang Y, Tan Y, Cai X, Cai L, Cai J, Zheng Y. Deletion of metallothionein exacerbates intermittent hypoxia-induced oxidative and inflammatory injury in aorta. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2014; 2014:141053. [PMID: 25177426 PMCID: PMC4142187 DOI: 10.1155/2014/141053] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Revised: 07/08/2014] [Accepted: 07/08/2014] [Indexed: 01/18/2023]
Abstract
The present study was to explore the effect of metallothionein (MT) on intermittent hypoxia (IH) induced aortic pathogenic changes. Markers of oxidative damages, inflammation, and vascular remodeling were observed by immunohistochemical staining after 3 days and 1, 3, and 8 weeks after IH exposures. Endogenous MT was induced after 3 days of IH but was significantly decreased after 8 weeks of IH. Compared with the wild-type mice, MT knock-out mice exhibited earlier and more severe pathogenic changes of oxidative damages, inflammatory responses, and cellular apoptosis, as indicated by the significant accumulation of collagen, increased levels of connective tissue growth factor, transforming growth factor β1, tumor necrosis factor-alpha, vascular cell adhesion molecule 1,3-nitrotyrosine, and 4-hydroxy-2-nonenal in the aorta. These findings suggested that chronic IH may lead to aortic damages characterized by oxidative stress and inflammation, and MT may play a pivotal role in the above pathogenesis process.
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Affiliation(s)
- Shanshan Zhou
- The Center of Cardiovascular Diseases at the First Hospital of Jilin University, 71 Xinmin Street, Changchun 130021, China
- Kosair Children's Hospital Research Institute at the Department of Pediatrics, University of Louisville, 570 South Preston Street, Baxter I, Suite 321B, Louisville, KY 40202, USA
| | - Yonggang Wang
- The Center of Cardiovascular Diseases at the First Hospital of Jilin University, 71 Xinmin Street, Changchun 130021, China
- Kosair Children's Hospital Research Institute at the Department of Pediatrics, University of Louisville, 570 South Preston Street, Baxter I, Suite 321B, Louisville, KY 40202, USA
| | - Yi Tan
- Kosair Children's Hospital Research Institute at the Department of Pediatrics, University of Louisville, 570 South Preston Street, Baxter I, Suite 321B, Louisville, KY 40202, USA
- Chinese-American Research Institute for Diabetic Complication, Wenzhou Medical College, Wenzhou 325035, China
| | - Xiaohong Cai
- Department of Pediatrics, The Second Affiliated Hospital & Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, China
| | - Lu Cai
- Kosair Children's Hospital Research Institute at the Department of Pediatrics, University of Louisville, 570 South Preston Street, Baxter I, Suite 321B, Louisville, KY 40202, USA
- Departments of Radiation Oncology and Pharmacology and Toxicology, University of Louisville, Louisville, KY 40202, USA
| | - Jun Cai
- Kosair Children's Hospital Research Institute at the Department of Pediatrics, University of Louisville, 570 South Preston Street, Baxter I, Suite 321B, Louisville, KY 40202, USA
| | - Yang Zheng
- The Center of Cardiovascular Diseases at the First Hospital of Jilin University, 71 Xinmin Street, Changchun 130021, China
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