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Yolk sac angiogenic defect and intra‐embryonic apoptosis in mice lacking the Ets‐related factor TEL
Author(s) -
Wang Li Chun,
Kuo Frank,
Fujiwara Yuko,
Gilliland D. Gary,
Golub Todd R.,
Orkin Stuart H.
Publication year - 1997
Publication title -
the embo journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 7.484
H-Index - 392
eISSN - 1460-2075
pISSN - 0261-4189
DOI - 10.1093/emboj/16.14.4374
Subject(s) - medical school , library science , sociology , medicine , medical education , computer science
The TEL gene, which is frequently rearranged in human leukemias of both myeloid and lymphoid origin, encodes a member of the Ets family of transcription factors. The TEL gene is widely expressed throughout embryonic development and in the adult. To determine the requirement for the TEL gene product in development we generated TEL knockout mice ( TEL −/− ) by gene targeting in embryonic stem cells. TEL −/− mice are embryonic lethal and die between E10.5–11.5 with defective yolk sac angiogenesis and intra‐embryonic apoptosis of mesenchymal and neural cells. Two‐thirds of TEL‐deficient yolk sacs at E9.5 lack vitelline vessels, yet possess capillaries, indicative of normal vasculogenesis. Vitelline vessels regress by E10.5 in the remaining TEL −/− yolk sacs. Hematopoiesis at the yolk sac stage, however, appears unaffected in TEL −/− embryos. Our findings demonstrate that TEL is required for maintenance of the developing vascular network in the yolk sac and for survival of selected cell types within the embryo proper.