Chronic Oral Intake of Soy Peptide Alleviates Anhedonia in Normally Housed Male C57BL/6J Mice

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  • HAMASAKI Miku
    Laboratory of Functional Genomics and Metabolism, Department of Bioscience and Biotechnology, Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University
  • YANO Chihiro
    Laboratory of Functional Genomics and Metabolism, Department of Bioscience and Biotechnology, Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University
  • ZEZE Koki
    Laboratory of Functional Genomics and Metabolism, Department of Bioscience and Biotechnology, Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University
  • KUROKI Kengo
    Laboratory of Functional Genomics and Metabolism, Department of Bioscience and Biotechnology, Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University
  • NISHIKAWA Nana
    Laboratory of Functional Genomics and Metabolism, Department of Bioscience and Biotechnology, Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University
  • KOZAKI Hiroaki
    Laboratory of Functional Genomics and Metabolism, Department of Bioscience and Biotechnology, Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University
  • FURUYA Shigeki
    Laboratory of Functional Genomics and Metabolism, Department of Bioscience and Biotechnology, Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University Faculty of Agriculture, Kyushu University Innovative Bio-Architecture Center, Kyushu University Environmental Control Center for Experimental Biology, Kyushu University

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<p>The impact of long-term soy peptide consumption on mood-related behavior in adult male mice was studied under normal housing conditions. Male C57BL/6J mice were fed a modified AIN-93M diet containing 7% soy peptide for 70 d. Sucrose preference and tail suspension tests were conducted to evaluate anhedonia and despair, respectively. Mice fed soy peptide consumed more sucrose than those in the control group fed AIN-93M in the sucrose preference test. However, no significant difference was observed in the total immobility time between the two groups in the tail suspension test. These findings suggest that chronic soy peptide intake may attenuate anhedonia, a hallmark symptom of major depressive disorder characterized by decreased sensitivity to reward and pleasure.</p>

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