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LPA 1 is essential for lymphatic vessel development in zebrafish
Author(s) -
Lee ShyhJye,
Chan TunHao,
Chen TzuCheng,
Liao BoKai,
Hwang PungPung,
Lee Hsinyu
Publication year - 2008
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fj.08-106088
Subject(s) - zebrafish , lysophosphatidic acid , biology , morpholino , lymphangiogenesis , in situ hybridization , microbiology and biotechnology , receptor , ectopic expression , dorsal aorta , lymphatic system , rhoa , anatomy , gene expression , immunology , signal transduction , gene , stem cell , biochemistry , genetics , cancer , haematopoiesis , metastasis
Lysophosphatidic acid (LPA) has long been implicated in regulating vascular development via endothelial cell‐expressed G protein‐coupled receptors. However, because of a lack of notable vascular defects reported in LPA receptor knockout mouse studies, the regulation of vasculature by LPA receptors in vivo is still uncertain. Using zebrafish as a model, we studied the gene expression patterns and functions of an LPA receptor, LPA 1 , during embryonic development, in particular, vascular formation. Whole‐mount in situ hybridization experiments revealed that zebrafish lpa 1 ( zlpa 1 ) was ubiquitously expressed early in development, and its expression domains were later localized to the head region and the vicinity of the dorsal aorta. The expression of zlpa 1 surrounding the dorsal aorta suggests its role in vasculature development. Knocking down of zLPA 1 by injecting morpholino (MO) oligonucleotides at 0.625–1.25 ng per embryo resulted in the absence of thoracic duct and edema in pericardial sac and trunk in a dose‐dependent manner. These zlpa 1 ‐MO‐resulted defects could be specifically rescued by ectopic expression of zlpa 1 . In addition, overexpression of vegf‐c , a well‐known lymphangiogenic factor, also partially ameliorated the inhibition of thoracic duct development. Taken together, these results demonstrate that LPA 1 is necessary for lymphatic vessel formation during embryonic development in zebrafish.—Lee, S.‐J., Chan, T.‐H., Chen, T.‐C., Liao, B.‐O., Hwang, P.‐P., Lee, H. LPA1 is essential for lymphatic vessel development in zebrafish. FASEB J. 22, 3706–3715 (2008)