A role of canonical transient receptor potential 5 channel in neuronal differentiation from A2B5 neural progenitor cells.
Store-operated Ca(2+) entry (SOCE) channels are the main pathway of Ca(2+) entry in non-excitable cells such as neural progenitor cells (NPCs). However, the role of SOCE channels has not been defined in the neuronal differentiation from NPCs. Here, we show that canonical transient receptor potential channel (TRPC) as SOCE channel influences the induction of the neuronal differentiation of A2B5(+) NPCs isolated from postnatal-12-day rat cerebrums. The amplitudes of SOCE were significantly higher in neural cells differentiated from proliferating A2B5(+) NPCs and applications of SOCE blockers, 2-aminoethoxy-diphenylborane (2-APB), and ruthenium red (RR), inhibited their rise of SOCE. Among TRPC subtypes (TRPC1-7), marked expression of TRPC5 and TRPC6 with turned-off TRPC1 expression was observed in neuronal cells differentiated from proliferating A2B5(+) NPCs. TRPC5 small interfering RNA (siRNA) blocked the neuronal differentiation from A2B5(+) NPCs and reduced the rise of SOCE. In contrast, TRPC6 siRNA had no significant effect on the neuronal differentiation from A2B5(+) NPCs. These results indicate that calcium regulation by TRPC5 would play a key role as a switch between proliferation and neuronal differentiation from NPCs.
Shin
Hye Young
HY
Department of Neurosurgery, Cancer Research Institute, Ischemic/Hypoxic Disease Institute, College of Medicine, Seoul National University, Seoul, Korea.
Hong
Yun Hwa
YH
Jang
Sung Soo
SS
Chae
Hong Gu
HG
Paek
Seung Leal
SL
Moon
Hyo Eun
HE
Kim
Dong Gyu
DG
Kim
Jun
J
Paek
Sun Ha
SH
Kim
Sang Jeong
SJ
D000818:Animals; D001896:Boron Compounds / Q000494:pharmacology; D020013:Calcium Signaling / Q000187:drug effects; D002454:Cell Differentiation / Q000187:drug effects; D049109:Cell Proliferation / Q000187:drug effects; D002469:Cell Separation; D002470:Cell Survival / Q000187:drug effects; D002478:Cells, Cultured; D055785:Gene Knockdown Techniques; D009457:Neuroglia / Q000166:cytology / Q000187:drug effects / Q000378:metabolism; D009474:Neurons / Q000166:cytology* / Q000187:drug effects / Q000378:metabolism; D034741:RNA, Small Interfering / Q000378:metabolism; D051381:Rats; D017207:Rats, Sprague-Dawley; D013234:Stem Cells / Q000166:cytology* / Q000187:drug effects / Q000378:metabolism*; D050052:TRPC Cation Channels / Q000235:genetics / Q000378:metabolism*; D019284:Thapsigargin / Q000494:pharmacology
C504876:2-aminoethoxydiphenylborane; D001896:Boron Compounds; D034741:RNA, Small Interfering; D050052:TRPC Cation Channels; C503500:Trpc5 protein, rat; C492145:Trpc6 protein, rat; D019284:Thapsigargin