Thymosin beta4 activates integrin-linked kinase and promotes cardiac cell migration, survival and cardiac repair.
Bock-Marquette I, Saxena A, White MD et al. · Nature · PMID 15565145
Study summary
Main finding
Thymosin beta4 enhanced cardiomyocyte migration and survival in culture. In mice after coronary ligation, treatment was associated with ILK/Akt signaling, early cell survival, and improved cardiac function.
Researchers examined heart-cell cultures and mice after surgical blockage of a coronary artery. The tested peptide was full-length thymosin beta4.
What the researchers measured
Heart-cell migration and survival, ILK/Akt cell-survival signaling, and cardiac function after injury in mice.
How to read this evidence
Researchers studied cells, isolated tissue, or animals. These experiments can help explain a mechanism, but do not establish benefits or safety in people. Human cells grown in a laboratory also belong in this category.
Results in context
Changes in cell-survival signaling accompanied the reported mouse cardiac findings. These experiments help investigate a repair pathway; they do not establish recovery after a heart attack in people or equivalence to commercial TB-500.
What this does not establish
The paper studied thymosin beta4, not an established equivalent of a product labeled TB-500. Mouse cardiac findings cannot establish human treatment outcomes.
This collection includes related thymosin beta4 research. Parent or engineered peptide findings do not establish that a TB-500 fragment or a product sold under that name has the same effects.
Publication & source
Why this paper is included
The title focuses on thymosin beta4 or TB-500; parent-peptide findings do not establish TB-500 fragment effects.
Publication indexing
Journal Article · Research Support, Non-U.S. Gov't · Research Support, U.S. Gov't, P.H.S.