Abstract:
:Although GPRC5B and GPRC5C are categorized into the G protein-coupled receptor family C, including glutamate receptors, GABA receptors, and taste receptors, their physiological functions remain unknown. Since both receptors are expressed in the brain and evolutionarily conserved from fly to human, it is conceivable that they have significant biological roles particularly in the central nervous system (CNS). We generated GPRC5B- and GPRC5C-deficient mice to examine their roles in the CNS. Both homozygous mice were viable, fertile, and showed no apparent histological abnormalities, though GPRC5B-deficient mice resulted in partial perinatal lethality. We demonstrated that the expressions of GPRC5B and GPRC5C are developmentally regulated and differentially distributed in the brain. GPRC5B-deficient mice exhibited altered spontaneous activity pattern and decreased response to a new environment, while GPRC5C-deficient mice have no apparent behavioral deficits. Thus, GPRC5B has important roles for animal behavior controlled by the CNS. In contrast, GPRC5C does not affect behavior, though it has a high sequence similarity to GPRC5B. These findings suggest that family C, group 5 (GPRC5) receptors in mammals are functionally segregated from their common ancestor.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Sano T,Kim YJ,Oshima E,Shimizu C,Kiyonari H,Abe T,Higashi H,Yamada K,Hirabayashi Ydoi
10.1016/j.bbrc.2011.07.118subject
Has Abstractpub_date
2011-09-02 00:00:00pages
460-5issue
3eissn
0006-291Xissn
1090-2104pii
S0006-291X(11)01362-3journal_volume
412pub_type
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