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Bombesin receptor subtype-3 modulates plasma insulin concentration
Kouji Matsumoto1, Kazuyuki Yamada, Etsuko Wada
1Department of Pharmaceuticals Research Laboratory, Mitsubishi Pharma Corporation, 1000 Kamoshida-cho, Aoba-ku, Yokohama-City, Kanagawa 227-0033, Japan. Matsumoto.Kouji@mk.m-pharma.co.jp
Peptides
|February 11, 2003
Summary
Mice lacking the bombesin receptor subtype-3 (BRS-3) pathway show altered insulin levels. This study reveals BRS-3
Area of Science:
- Endocrinology
- Metabolic Research
- Genetics
Background:
- Mice lacking a functional bombesin receptor subtype-3 (BRS-3) exhibit mild obesity.
- The precise origin of obesity in BRS-3 knockout (KO) mice is not fully understood.
- Investigating the BRS-3 pathway is crucial for understanding metabolic regulation.
Purpose of the Study:
- To elucidate the physiological role of the bombesin receptor subtype-3 (BRS-3) pathway.
- To determine the contribution of BRS-3 to plasma insulin concentration regulation.
- To analyze metabolic phenotypes in a BRS-3 KO/KK-Ay hybrid mouse model.
Main Methods:
- A strain-crossing strategy was employed, crossing heterozygous BRS-3 KO female mice (X-/X) with male KK-Ay mice (Ay/+).
- Generated BRS-3 KO/KK-Ay hybrid animals (X-/Y:Ay/+) for analysis.
- Plasma insulin concentrations and oral glucose tolerance tests were performed across different genotypes.
Main Results:
- BRS-3 KO/KK-Ay hybrid mice (X-/Y:Ay/+) displayed significantly higher plasma insulin concentrations.
- Impaired additional insulin secretion was observed in X-/Y:Ay/+ mice during oral glucose tolerance tests compared to other genotypes.
- These findings highlight a significant link between BRS-3 and insulin regulation.
Conclusions:
- The bombesin receptor subtype-3 (BRS-3) pathway plays a role in regulating plasma insulin concentrations.
- Disruption of the BRS-3 pathway impacts glucose metabolism and insulin response.
- Further research into the BRS-3 pathway could offer insights into metabolic disorders.