• 공업화학
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• 제20권6호
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• pp.581-585
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• 2009

당뇨병은 인슐린 분비가 부족하거나 그 인식 기능이 감소하여 발생하는 만성질환으로, 현재까지도 완전한 치료법은 개발되지 못하고 있다. 그 중 제I형 당뇨병에 가장 많이 쓰이는 치료법은 인슐린 주사로 알려져 있다. 하지만 인슐린 주사는 때로 치명적인 위험과 불편함을 수반하므로, 이를 개선하기 위한 많은 연구들이 수행되고 있다. 이러한 방법의 일환으로, 자가 조절 인슐린 전달 시스템이 제안되었다. 본 총설에서는 현재까지 연구되고 있는 대표적인 자가 조절 인슐린 전달 시스템의 포도당 응답성 방출 원리에 대해 살펴보고자 한다.

• 한국축산식품학회지
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• 제38권6호
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• pp.1144-1154
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• 2018

Both the calcium and collagen in bone powder are hard to be absorbed by the body. Although enzymatic hydrolysis by protease increased the bio-availability of bone powder, it was a meaningful try to further increase $Ca^{2+}$ release, oligopeptide formation and antioxidant activity of the sheep bone hydrolysate (SBH) by lactic acid bacteria (LAB) fermentation. Lactobacillus helveticus was selected as the starter for its highest protease-producing ability among 5 tested LAB strains. The content of liberated $Ca^{2+}$ was measured as the responsive value in the response surface methodology (RSM) for optimizing the fermenting parameters. When SBH (adjusted to pH 6.1) supplemented with 1.0% glucose was inoculated 3.0% L. helveticus and incubated for 29.4 h at $36^{\circ}C$, $Ca^{2+}$ content in the fermented SBH significantly increased (p<0.01), and so did the degree of hydrolysis and the obtaining rate of oligopeptide. The viable counts of L. helveticus reached to $1.1{\times}10^{10}CFU/mL$. Results of Pearson correlation analysis demonstrated that LAB viable counts, $Ca^{2+}$ levels, obtaining rates of oligopeptide and the yield of polypeptide were positively correlated with each other (p<0.01). The abilities of SBH to scavenge the free radicals of DPPH, OH and ABTS were also markedly enhanced after fermentation. In conclusion, L. helveticus fermentation can further boost the release of free $Ca^{2+}$ and oligopeptide, enhance the antioxidant ability of SBH. The L. helveticus fermented SBH can be developed as a novel functional dietary supplement product.