Cytoglobin/STAP, its unique localization in splanchnic fibroblast-like cells and function in organ fibrogenesis.

Authors: Nakatani, K  Okuyama, H  Shimahara, Y  Saeki, S  Kim, DH  Nakajima, Y  Seki, S  Kawada, N  Yoshizato, K 
Citation: Nakatani K, etal., Lab Invest. 2004 Jan;84(1):91-101.
Pubmed: (View Article at PubMed) PMID:14647402
DOI: Full-text: DOI:10.1038/sj.labinvest.3700013

Cytoglobin/stellate cell activation-associated protein (Cygb/STAP) consists of a new class of hexacoordinate globin superfamily, which was recently discovered by a proteome analysis on the rat hepatic stellate cells. Unlike haemoglobin, myoglobin, and neuroglobin, Cygb/STAP is ubiquitously expressed in several organs, although its detailed localization has not been clarified. Immunohistochemistry and immunoelectron microscopy revealed that Cygb/STAP is uniquely localized in fibroblast-like cells in splanchnic organs, namely the vitamin A-storing cell lineage, but neither in epithelial cells, endothelial cells, muscle cells, blood cells, macrophages, nor dermal fibroblasts. The expression of Cygb/STAP was upregulated in fibrotic lesions of the pancreas and kidney in which activated fibroblast-like cells or myofibroblasts are known to increase in number. In cultured hepatic stellate cells, Cygb/STAP expression was augmented by the stimulation with sera, platelet-derived growth factor-BB, and transforming growth factor-beta 1. Overexpression of Cygb/STAP in NIH 3T3 cells induced the cells to lessen migratory activities and increase the expression of collagen alpha1(I) mRNA. These results indicate that Cygb/STAP is a tissue globin uniquely localized in splanchnic fibroblastic cell lineage and may play a role in fibrotic organ disorder.


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CRRD Object Information
CRRD ID: 9685173
Created: 2014-12-22
Species: All species
Last Modified: 2014-12-22
Status: ACTIVE


RGD is funded by grant HL64541 from the National Heart, Lung, and Blood Institute on behalf of the NIH.