Gα13 is closely related to hematopoiesis in zebrafish.
Heterotrimeric guanine nucleotide-binding regulatory proteins (G proteins) function as signal transducers and control many different physiologic processes. G proteins can be grouped into four families: Gs, Gi, Gq and G12. Gα13 belongs to the G12 family. In zebrafish, there are two isoforms of Gα13: Gα13a and Gα13b. We show here that knockdown of Gα13b in zebrafish results in hematopoietic and angiogenic defects. The Gα13b morphants don't show complete loss of expression of gata1, pu.1 or flk until 35 hpf suggests that Gα13b is closely related to the development of hematopoietic cells. Further studies reveal that blood cells and vascular endothelial cells have undergone apoptosis through a p53-dependent pathway in Gα13b-depleted embryos. Injection of p53 morpholino could partially rescue the phenotype of Gα13b morphants. These data possibly demonstrate a new role for Gα13 in cell survival.
Laboratory of Molecular Genetics and Developmental Biology, College of Life Sciences, Wuhan University, Department of Gynaecology, South Central Hospital, Wuhan, 430072, People's Republic of China.
Ding
D
Ye
Qiwen
Q
Yang
Yang
Y
Li
Xinyun
X
Huang
Jiarui
J
Hu
Shiguang
S
Qian
Zheng
Z
Tan
Ping
P
Song
D000818:Animals; D015153:Blotting, Western; D002470:Cell Survival / Q000235:genetics*; D017931:DNA Primers / Q000235:genetics; D044365:GTP-Binding Protein alpha Subunits, G12-G13 / Q000235:genetics* / Q000502:physiology; D055785:Gene Knockdown Techniques; D005819:Genetic Markers / Q000235:genetics; D006410:Hematopoiesis / Q000235:genetics*; D017403:In Situ Hybridization; D020287:In Situ Nick-End Labeling; D009841:Oligonucleotides / Q000235:genetics; D010641:Phenotype; D020033:Protein Isoforms / Q000235:genetics* / Q000502:physiology; D020133:Reverse Transcriptase Polymerase Chain Reaction; D015027:Zebrafish / Q000235:genetics* / Q000502:physiology
D017931:DNA Primers; D005819:Genetic Markers; D009841:Oligonucleotides; D020033:Protein Isoforms; D044365:GTP-Binding Protein alpha Subunits, G12-G13