[en] Hypoxia is known to be a major factor in the induction of angiogenesis during tumor development but its role in lymphangiogenesis remains unclear. Blood and lymphatic vasculatures are stimulated by the vascular endothelial family of growth factors - the VEGFs. In this review, we investigate the role of hypoxia in the molecular regulation of synthesis of the lymphangiogenic growth factors VEGF-A, VEGF-C, and VEGF-D. Gene expression can be regulated by hypoxia at either transcriptional or translational levels. In contrast to strong induction of DNA transcription by hypoxia-inducible factors (HIFs), the majority of cellular stresses such as hypoxia lead to inhibition of cap-dependent translation of mRNA and downregulation of protein synthesis. Here, we describe how initiation of translation of VEGF mRNA is induced by hypoxia through an internal ribosome entry site (IRES)-dependent mechanism. Considering the implications of the lymphatic vasculature for metastatic dissemination, it is crucial to understand the molecular regulation of lymphangiogenic growth factors by hypoxia to obtain new insights into cancer therapy.
Disciplines :
Biotechnology
Author, co-author :
Morfoisse, Florent ; Université de Liège > Département des sciences cliniques > Labo de biologie des tumeurs et du développement
Renaud, Edith
Hantelys, Fransky
Prats, Anne-Catherine
Garmy-Susini, Barbara
Language :
English
Title :
Role of hypoxia and vascular endothelial growth factors in lymphangiogenesis.
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