Expression of angiotensin II and its receptors in cyclosporine‐induced gingival overgrowth. (28th October 2012)

• Record Type: Journal Article
• Authors: Subramani, T.; Senthilkumar, K.; Periasamy, S.; Rao, S.
• Is Part Of: Journal of periodontal research. Volume 48:Number 3(2013:Jun.)
• Page Start: 386
• Page End: 391
• Publication Date: 2012-10-28
• Subjects: Periodontics -- Periodicals; 617.632
• DOI: 10.1111/jre.12020
• Languages: English
• ISSNs: 0022-3484

Abstract

<abstract abstract-type="main" id="jre12020-abs-0001"> <title> <x xml:space="preserve">Abstract</x> </title> <sec id="jre12020-sec-0001" sec-type="section"> <title>Background and Objectives</title> <p>The renin–angiotensin system (RAS) is considered as a hormonal circulatory system involved in maintaining blood pressure, electrolyte and fluid homeostasis. RAS components can be synthesized in local tissues and are found to play a role in gingival overgrowth. The drug‐induced gingival overgrowth (DIGO) is a fibrotic condition, which is associated with multiple factors, including inflammation and adverse drug effects such as cyclosporine A. This study was directed forward to the identification of the angiotensinogen, angiotensin II (Ang II) and its receptors AT<sub>1</sub>/AT<sub>2</sub> expression in DIGO tissues and cyclosporine‐treated human gingival fibroblast cells.</p> </sec> <sec id="jre12020-sec-0002" sec-type="section"> <title>Material and Methods</title> <p>Gingival samples were obtained from patients with cyclosporine‐induced gingival overgrowth, chronic periodontitis and normal healthy subjects. The total RNA was isolated and reverse transcription–polymerase chain reaction was performed for angiotensinogen, Ang II and AT<sub>1</sub>/AT<sub>2</sub> receptor. Ang II protein was estimated from tissue by enzyme immunoassay. The expression of Ang II and its receptors were also examined in gingival fibroblast cells treated with cyclosporine.</p> </sec> <sec id="jre12020-sec-0003" sec-type="section"> <title>Results</title> <p>Ang II mRNA and protein expression was significantly higher in patients with DIGO than in patients with periodontitis and healthy subjects. The AT<sub>1</sub> mRNA was expressed more than AT<sub>2</sub> in all examined tissues. In gingival fibroblasts, Ang II and AT<sub>1</sub> expressions were increased with cyclosporine incorporation compared to controls.</p> </sec> <sec id="jre12020-sec-0004" sec-type="section"> <title>Conclusion</title> <p>These results suggest that cyclosporine can modulate local expression of RAS components such as angiotensinogen, Ang II and its receptors in gingival tissues and gingival fibroblast cells.</p> </sec> </abstract>