Effects of Cyclic High Ambient Temperature on Muscle Imidazole Dipeptide Content in Broiler Chickens

Ayumi Katafuchi; Mizuki Kamegawa; Serina Goto; Daichi Kuwahara; Yukiko Osawa; Saki Shimamoto; Shinya Ishihara; Akira Ohtsuka; Daichi Ijiri

doi:10.2141/jpsa.2024004

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Effects of Cyclic High Ambient Temperature on Muscle Imidazole Dipeptide Content in Broiler Chickens

Ayumi Katafuchi, Mizuki Kamegawa, Serina Goto, Daichi Kuwahara, Yukiko Osawa, Saki Shimamoto, Shinya Ishihara, Akira Ohtsuka, Daichi Ijiri

Author information

Ayumi Katafuchi
Graduate School of Agriculture, Forestry and Fisheries, Kagoshima University, 1-21-24 Korimoto, Kagoshima 890-0065, Japan
Mizuki Kamegawa
Graduate School of Agriculture, Forestry and Fisheries, Kagoshima University, 1-21-24 Korimoto, Kagoshima 890-0065, Japan
Serina Goto
Department of Agricultural Sciences and Natural Resources, Kagoshima University, Korimoto, Kagoshima 890-0065, Japan
Daichi Kuwahara
Biotechnology Group, Innovation Technology Center, Central Technical Research Laboratory, ENEOS Corporation, Chidori-Cho 8, Naka-ku, Yokohama 231-0815, Japan
Yukiko Osawa
Biotechnology Group, Innovation Technology Center, Central Technical Research Laboratory, ENEOS Corporation, Chidori-Cho 8, Naka-ku, Yokohama 231-0815, Japan
Saki Shimamoto
Graduate School of Science and Technology, Niigata University, 8050 Ikarashi 2-no-cho, Nishi-ku, Niigata 950-2181, Japan
Shinya Ishihara
Graduate School of Applied Life Science, Nippon Veterinary and Life Science University, 1-7-1 Kyonan-cho, Musashino, Tokyo 180-8602, Japan
Akira Ohtsuka
Graduate School of Agriculture, Forestry and Fisheries, Kagoshima University, 1-21-24 Korimoto, Kagoshima 890-0065, Japan
Department of Agricultural Sciences and Natural Resources, Kagoshima University, Korimoto, Kagoshima 890-0065, Japan
Daichi Ijiri
Graduate School of Agriculture, Forestry and Fisheries, Kagoshima University, 1-21-24 Korimoto, Kagoshima 890-0065, Japan
Department of Agricultural Sciences and Natural Resources, Kagoshima University, Korimoto, Kagoshima 890-0065, Japan

Keywords: anserine, broiler chicken, carnosinase, carnosine, carnosine synthase, imidazole dipeptide

JOURNAL OPEN ACCESS FULL-TEXT HTML

2024 Volume 61 Article ID: 2024004

DOI https://doi.org/10.2141/jpsa.2024004

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Abstract

Imidazole dipeptides possess important bioregulatory properties in animals. This study aimed to evaluate the effect of high ambient temperature on muscle imidazole dipeptides (carnosine, anserine, and balenine) in broiler chickens. Sixteen 14-day-old male broiler chickens were divided into two groups, which were reared under thermoneutral (25 ± 1 °C) or cyclic high ambient temperature (35 ± 1 °C for 8 h/day) for 4 weeks. Chickens exposed to cyclic high ambient temperatures displayed lower skeletal muscle anserine and carnosine content than control chickens. Balenine could not be detected in the pectoral muscle of either group. The pectoral muscles of broiler chickens kept under cyclic high-temperature exhibited significantly lower mRNA expression of carnosine synthase 1, which synthesizes carnosine and anserine; but a significantly higher mRNA expression of carnosinase 2, which degrades carnosine and anserine. Our results suggest that heat exposure decreases pectoral imidazole dipeptide content in broiler chickens. This may be attributed to a lower expression of imidazole dipeptide-synthesizing genes, but higher levels of genes involved in their degradation.

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