Budget Amount *help |
¥16,640,000 (Direct Cost: ¥12,800,000、Indirect Cost: ¥3,840,000)
Fiscal Year 2022: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2021: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2020: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2019: ¥6,630,000 (Direct Cost: ¥5,100,000、Indirect Cost: ¥1,530,000)
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Outline of Final Research Achievements |
We demonstrated that chitin synthase in teleost species can synthesize chitin, and homologues of chitin synthase are widely conserved among Actinopterygii. Also, we found the intestinal chitinous membrane in various fish species. The pore size of chitinous membrane in the fish intestine is around 100 nm, which is fine enough to function as a barrier against bacteria. These findings strongly suggest that the intestinal chitin-based defense system against bacteria is universal among ray-finned fishes. We also determined that the chitin synthase protein is localized at the apical brush-border membrane of the intestinal epithelial cells in teleost fish, and identified several genes involved in the synthesis pathway of UDP-GlcNAc, a substrate of chitin synthase, specifically expressed in the intestinal epithelia.
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