myocardial repair with long-term and low-dose administration of a nitric oxide synthesis inhibitor. myofibroblasts, type iii collagen and fibronectin
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ID: 224409
1999
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Abstract
OBJECTIVE: To study the healing process of the myocardium in hypertensive rats undergoing inhibition of nitric oxide synthesis. METHODS: Two groups of animals were studied: one received L-NAME, 12mg/kg/day, and the other was a control group. The presence of type III collagen, fibronectin, and alpha-smooth muscle actin-positive cells was assessed by immunohistochemistry. RESULTS: Fibronectin was seen in both early and late lesions, while type III collagen was seen mainly in areas of incomplete healing, situated among myocytes and around the intramyocardial branches of the coronary arteries. Areas representing early and late lesions showed a population of spindle-shaped cells. Immunohistochemistry showed that these cells were positive for alpha-smooth muscle actin. CONCLUSION: In the myocardium of hypertensive rats, the alpha-smooth muscle actin-positive cells are related to the accumulation of type III collagen and fibronectin in the areas of myocardial damage.
| Reference Key |
pessanha1999arquivosmyocardial
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|---|---|
| Authors | ;Mônica Gomes Pessanha;Myriam Dumas Hahn;Carlos Alberto Mandarim-de-Lacerda |
| Journal | revista cubana de ciencias informáticas |
| Year | 1999 |
| DOI |
10.1590/S0066-782X1999000700008
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| URL | |
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