Distinct developmental expression of two isoforms of Ca2+/calmodulin-dependent protein kinase kinases and their involvement in hippocampal dendritic formation.
Ca(2+)/calmodulin-dependent protein kinase kinases (CaMKKs) are upstream protein kinases that phosphorylate and activate CaMKI and CaMKIV, both of which are involved in a variety of neuronal functions. Here, we first demonstrated that the two isoforms of CaMKK were differentially expressed during neural development by in situ hybridization. We also demonstrated that both dominant negative and pharmacological interference with CaMKK inhibitor, STO-609 resulted in a significant decrease in the number of primary dendrites of cultured hippocampal neurons. Our present findings provide the detailed anatomical information on the developmental expression of CaMKKs and the functional involvement of CaMKK in the formation of primary dendrites.
Division of Histology, Department of Cell Biology, Graduate School of Medicine, Tohoku University, Sendai 980-8575, Japan.
Akifumi
A
Kamata
Hiroyuki
H
Sakagami
Hiroshi
H
Tokumitsu
Masashi
M
Sanda
Yuji
Y
Owada
Kohji
K
Fukunaga
Hisatake
H
Kondo
D000818:Animals; D001562:Benzimidazoles / Q000494:pharmacology; D017871:Calcium-Calmodulin-Dependent Protein Kinases / Q000096:biosynthesis* / Q000187:drug effects; D002478:Cells, Cultured; D003712:Dendrites / Q000187:drug effects / Q000201:enzymology*; D004622:Embryo, Mammalian; D006624:Hippocampus / Q000196:embryology* / Q000201:enzymology*; D017403:In Situ Hybridization; D007527:Isoenzymes / Q000096:biosynthesis; D007546:Isoquinolines / Q000494:pharmacology; D051379:Mice; D018613:Microscopy, Confocal; D053644:Naphthalimides / Q000494:pharmacology; D012333:RNA, Messenger / Q000032:analysis; D051381:Rats; D017208:Rats, Wistar; D020133:Reverse Transcriptase Polymerase Chain Reaction
D001562:Benzimidazoles; D007527:Isoenzymes; D007546:Isoquinolines; D053644:Naphthalimides; D012333:RNA, Messenger; C458525:STO 609; D017871:Calcium-Calmodulin-Dependent Protein Kinases