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Author Ravindran, Resmi ♦ Krishnan, L. K.
Source Sree Chitra Tirunal Institute for Medical Sciences & Technology
Content type Text
Publisher Pathophysiology of Haemostasis and Thrombosis
File Format PDF
Language English
Subject Domain (in DDC) Technology ♦ Medicine & health ♦ Diseases
Subject Domain (in MeSH) Hemic and Immune Systems ♦ Anatomy ♦ Hemic and Lymphatic Diseases ♦ Diseases
Subject Keyword Hematology
Abstract beta-Thromboglobulin (beta-TG) proteins are a heterogeneous group released from platelet alpha-granules on activation and have an effect on fibroblast migration and proliferation. We have previously reported the action of a metal-dependent protease on platelet-released proteins, which generates low-molecular-weight proteins that could be inhibited by ethylenediaminetetraacetic acid (EDTA). To understand the physiological significance of the breakdown of proteins after release, their effect on fibroblast proliferation in vitro was studied. Platelet releasates were obtained without and with EDTA inhibition designated as R1 and R2, respectively, and proteins were affinity purified for testing. Cell proliferation was measured using [(3)H]-thymidine assay. Both R1 and R2 showed maximum activity at 100 mu g/ml and R2 elicited significant proliferation compared to R1. When affinity-purified proteins were tested at 100 ng/ml, high-molecular-weight proteins showed significantly higher proliferation than low-molecular-weight proteins. We have shown that beta-TG is cleaved after being released from activated platelets, thereby becoming less mitogenic for fibroblasts. Copyright (C) 2010 S. Karger AG, Basel
Education Level UG and PG
Learning Resource Type Article
Educational Framework Medical Council of India (MCI)
Volume Number 36
Issue Number 6
Page Count 5
Starting Page 285
Ending Page 289