Abstract:
:The lymphatic vasculature is essential for the recirculation of extracellular fluid, fat absorption, and immune function and as a route of tumor metastasis. The dissection of molecular mechanisms underlying lymphangiogenesis has been accelerated by the identification of tissue-specific lymphatic endothelial markers and the study of congenital lymphedema syndromes. We report the results of genetic analyses of a kindred inheriting a unique autosomal-recessive lymphedema-choanal atresia syndrome. These studies establish linkage of the trait to chromosome 1q32-q41 and identify a loss-of-function mutation in PTPN14, which encodes a nonreceptor tyrosine phosphatase. The causal role of PTPN14 deficiency was confirmed by the generation of a murine Ptpn14 gene trap model that manifested lymphatic hyperplasia with lymphedema. Biochemical studies revealed a potential interaction between PTPN14 and the vascular endothelial growth factor receptor 3 (VEGFR3), a receptor tyrosine kinase essential for lymphangiogenesis. These results suggest a unique and conserved role for PTPN14 in the regulation of lymphatic development in mammals and a nonconserved role in choanal development in humans.
journal_name
Am J Hum Genetjournal_title
American journal of human geneticsauthors
Au AC,Hernandez PA,Lieber E,Nadroo AM,Shen YM,Kelley KA,Gelb BD,Diaz GAdoi
10.1016/j.ajhg.2010.08.008subject
Has Abstractpub_date
2010-09-10 00:00:00pages
436-44issue
3eissn
0002-9297issn
1537-6605pii
S0002-9297(10)00421-0journal_volume
87pub_type
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journal_title:American journal of human genetics
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