Article
Expression of Metalloproteinases (MMP-1, MMP-2, and MMP-9) and their inhibitors (TIMP-1 and TIMP-2) in Schistosomal portal fibrosis
Registro en:
GOMEZ, Daniel Esteban et al. Expression of Metalloproteinases (MMP-1, MMP-2, and MMP-9) and their inhibitors (TIMP-1 and TIMP-2) in Schistosomal portal fibrosis. American Journal of Tropical Medicine and Hygiene, v. 61, n. 1, p. 9-13, 1999.
0002-9637
10.4269/ajtmh.1999.61.9
Autor
Gomez, Daniel Esteban
Lorenzo, Mariana S. de
Alonso, Daniel F.
Andrade, Zilton de Araújo
Resumen
Antorchas Foundation (Buenos Aires) awarded to Daniel E. Gomez and Zilton A. Andrade, and by Pronex (Brazil) Focal extracellular matrix degradation morphologically identified in human portal pipestem fibrosis due to Schistosoma mansoni did not express immunohistochemical reactivity for metalloproteinases (MMP-1, MMP-2, and MMP-9) and their inhibitors (TIMP-1 and TIMP-2). However, when active schistosomal periovular granulomas were present, a strong reactivity for MMP-1, MMP-2, TIMP-1, and TIMP-2 was observed. No reactivity was ever observed for MMP-9. However, the positive pattern of immunohistochemical expression was not seen in old fibrotic periovular granulomas, which were sometimes situated in other areas of the same microscopic section. Positive staining for MMPs and TIMPs was observed at the same time in hepatocytes and within the apical portion of bile duct epithelium. These findings are consistent with the concept that matrix degradation in recent and old fibroses, in addition to differing at the ultrastructural level, also differs in immunohistochemical expression of metalloproteinases and their inhibitors. 2020-01-06