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http://dx.doi.org/10.5352/JLS.2013.23.9.1177

Angiogenic Induction by Trichinella spiralis Infection through Thymosin β4  

Ock, Mee Sun (Department of Parasitology and Gnenetics, Kosin University College of Medicine)
Cha, Hee-Jae (Department of Parasitology and Gnenetics, Kosin University College of Medicine)
Publication Information
Journal of Life Science / v.23, no.9, 2013 , pp. 1177-1182 More about this Journal
Abstract
Trichinella spiralis (T. spiralis) has been reported to induce angiogenesis and a supply of nutrients and to act as a reliable waste disposal system by induction of the expression of the angiogenic molecule vascular endothelial cell growth factor (VEGF) during nurse cell formation. However, the mechanism underlying the induction of VEGF in nurse cells by T. spiralis has not yet been defined. Some research has pointed to the possibility of hypoxia in nurse cells, but whether hypoxia occurs in infected muscle or nurse cells has not been studied. It is also a matter of debate whether hypoxia induces the expression of VEGF and subsequent angiogenesis in infected muscle. Recent studies showed that thymosin ${\beta}4$, a potent VEGF-inducing protein, was expressed at a very early stage of muscle infection by T. spiralis, suggesting that VEGF is induced at an early stage in nurse cells. Furthermore, hypoxia was not detected in any nurse cell stage but was detected in inflammatory cells. The findings suggest that induction of angiogenesis by VEGF in T. spiralis-infected nurse cells is mediated by thymosin ${\beta}4$ and unrelated to hypoxia.
Keywords
Thymosin ${\beta}4$; Trichinella spiralis; nurse cell; hypoxia; vascular endothelial cell growth factor (VEGF);
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