Department of Science and Technology, Tay Nguyen University, Buon Ma Thuot City 630000, Vietnam.
Department of Chemistry, Tamkang University, New Taipei City 25137, Taiwan.
Mar Drugs. 2017 Nov 7;15(11):350. doi: 10.3390/md15110350.
Six kinds of chitinous materials have been used as sole carbon/nitrogen (C/N) sources for producing α-glucosidase inhibitors (aGI) by sp. TKU042. The aGI productivity was found to be highest in the culture supernatants using demineralized crab shell powder (deCSP) and demineralized shrimp shell powder (deSSP) as the C/N source. The half maximal inhibitory concentration (IC) and maximum aGI activity of fermented deCSP (38 µg/mL, 98%), deSSP (108 µg/mL, 89%), squid pen powder (SPP) (422 µg/mL, 98%), and shrimp head powder (SHP) (455 µg/mL, 92%) were compared with those of fermented nutrient broth (FNB) (81 µg/mL, 93%) and acarbose (1095 µg/mL, 74%), a commercial antidiabetic drug. The result of the protein/chitin ratio on aGI production showed that the optimal ratio was 0.2/1. Fermented deCSP showed lower IC and higher maximum inhibitory activity than those of acarbose against rat intestinal α-glucosidase.
六种壳质材料已被用于 sp. TKU042 生产α-葡萄糖苷酶抑制剂(aGI)的唯一碳/氮(C/N)源。发现以去矿化蟹壳粉(deCSP)和去矿化虾壳粉(deSSP)作为 C/N 源时,其发酵上清液中 aGI 的产率最高。发酵 deCSP(半抑制浓度(IC)为 38 µg/mL,最大酶活为 98%)、deSSP(IC 为 108 µg/mL,最大酶活为 89%)、鱿鱼笔粉(SPP)(IC 为 422 µg/mL,最大酶活为 98%)和虾头粉(SHP)(IC 为 455 µg/mL,最大酶活为 92%)的半最大抑制浓度(IC)和最大 aGI 活性与发酵营养肉汤(FNB)(IC 为 81 µg/mL,最大酶活为 93%)和阿卡波糖(商业抗糖尿病药物,IC 为 1095 µg/mL,最大酶活为 74%)进行了比较。蛋白/壳质比在 aGI 生产中的结果表明,最佳比例为 0.2/1。发酵 deCSP 对大鼠肠道α-葡萄糖苷酶的 IC 低于阿卡波糖,最大抑制活性高于阿卡波糖。