Overexpression of the natural tetrapeptide acetyl-N-ser-asp-lys-pro derived from thymosin beta4 in neoplastic diseases.

Abstract:

:The natural tetrapeptide acetyl-ser-asp-lys-pro (AcSDKP) is formed in vivo by enzymatic cleavage of the N terminus of thymosin beta4 by prolyl oligopeptidase (POP). Recently, AcSDKP was shown to promote angiogenesis. Because of the critical role of neovascularization in cancer development, the levels of AcSDKP and POP activity in a number of different malignant tissues were investigated. Our studies revealed that AcSDKP levels were markedly elevated in neoplastic diseases including hematologic malignancies and solid neoplasms. Consistent with this finding, the enhanced activity of POP was also detected in all analyzed specimens of cancer tissues. Both these novel findings are in concert with the previously reported overexpression of thymosin beta4 in a large variety of malignant tumors and with its potential role in cancerogenesis. The physiological relevance of these findings awaits further studies; however, our first results strongly suggest a key role for AcSDKP in the pathogenesis of cancer.

journal_name

Ann N Y Acad Sci

authors

Liu JM,Garcia-Alvarez MC,Bignon J,Kusinski M,Kuzdak K,Riches A,Wdzieczak-Bakala J

doi

10.1111/j.1749-6632.2010.05488.x

subject

Has Abstract

pub_date

2010-04-01 00:00:00

pages

53-9

eissn

0077-8923

issn

1749-6632

pii

NYAS5488

journal_volume

1194

pub_type

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