• 제목/요약/키워드: -glucosidase inhibitor

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식용버섯인 노랑느타리버섯으로부터 혈당상승억제성 α-glucosidase 저해제의 추출 및 특성 (Extraction and Characterization of an Anti-hyperglycemic α-Glucosidase Inhibitor from Edible Mushroom, Pleurotus cornucopiae)

  • 배상민;한상민;이윤혜;정윤경;지정현;이종수
    • 한국미생물·생명공학회지
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    • 제44권2호
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    • pp.124-129
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    • 2016
  • 식용버섯인 노랑느타리버섯으로부터 α-glucosidase 저해제의 추출과 정제에 대하여 연구하였다. α-glucosidase 저해제는 노랑느타리버섯 자실체를 증류수로 30℃에서 12시간 처리하였을 때 가장 많이 추출되었다. α-glucosidase 저해제를 sephadex G-100 여과 크로마토그래피와 펩신 가수분해, sephadex G-50 여과 크로마토그래피, 역상 HPLC로 정제한 결과 수율과 α-glucosidase 저해활성은 각각 12.2%와 IC50 9.10 mg/ml이었다. 정제한 α-glucosidase 저해제는 Thr-Ile-Ala-Phe-Ile-Asp (A)과 Tyr-Tyr-Ala-Ile-Gly-Asp (B)의 서열을 갖고 있는 두개의 헥사펩타이드를 함유하였고 이들의 분자량은 각각 (A)가 678.79 Da, (B)가 643.7 Da이었다. 정제한 α-glucosidase 저해제는 α-glucosidase에 대하여 혼합형 저해양상을 보였고 streptozotocin으로 유도된 당뇨 쥐모델에서 50 mg/kg과 300 mg/kg 투여시 혈당함량을 낮추어 주는, 농도 의존적 혈당상승억제 효과를 보였다.

Streptomyces 속 균주가 생성하는 $\alpha$-D-Glucosidase Inhibitor(II)-저해물질의 생산조건 - ($\alpha$-D-Glucosidase Inhibitor from Streptomyces sp. (II) -Cultural Conditions for the Inhibitor Production-)

  • 도재호;주현규
    • 한국미생물·생명공학회지
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    • 제17권3호
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    • pp.207-212
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    • 1989
  • 토양으로부터 분리 한 균주 YS-221-B로부터 $\alpha$-D-Glucosidase Inhibitor 생산조건을 검토한 결과는 다음과 같다. 최적 pH와 온도는 8.0, 3$0^{\circ}C$였으며, 탄소원으로는 mannitol, 1-Inositol, erythritol과 같은 당알코올이 양호하였으며, 질소원으로는 asparagine, beef extract가 양호하였다. Riboflavin, folic acid, thiamine과 같은 vitamin의 첨가에 의해서 저해물질 생산이 10~20% 증가되었으며, 금속이온 중에 $Zn^{++}$, $Mg^{++}$은 약 20% 정도 물질생산을 촉진시켰으나 Li$^+$, Co$^{++}$ $Ca^{++}$, Fe$^{++}$ 등은 감소시켰다. 그리고 pH8.0, 3$0^{\circ}C$에서 8~9일간 배양함으로써 저해물질 생산이 최고에 달하였다.

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Synthesis and Activity of a Potent ${\alpha}$-glucosidase inhibitor, (1R, 6R, 8S)-cis-1,6-dihydroxypyrrolizidine, and its isomer

  • Jung, Kyeong-Eun;Kang, Yong-Koo;Kim, Dong-Jin;Park, Sang-Woo
    • Archives of Pharmacal Research
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    • 제20권4호
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    • pp.346-350
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    • 1997
  • The synthesis of cis- and trans-1,6-dihydroxypyrrolizidine starting from trans-4-hydroxy-L-proline and their evaluation as glycosidase inhibitors are reported. The cis-isomer was found to be a potent inhibitor against .alpha.-glucosidase and showed weak inhibitory effect against other glycosidases. The trans-isomer exhibited weak inhibitions of b-glucosidase and amylo-glucosidase and poor inhibition of other glycosidases.

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효모 Pichia burtonii Y257-7에 의한 ${\alpha}$-Glucosidase 저해제의 생산 및 식후 혈당 상승 억제 효과 (Production and Anti-hyperglycemic Effects of ${\alpha}$-Glucosidase Inhibitor from Yeast, Pichia burtonii Y257-7)

  • 김영헌;신자원;이종수
    • 한국미생물·생명공학회지
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    • 제42권3호
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    • pp.219-224
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    • 2014
  • 본 연구에서는 우리나라 전통발효식품에서 분리한 효모들을 이용하여 새로운 항당뇨성 ${\alpha}$-glucosidase 저해물질을 개발하기 위하여, 먼저 48종의 효모들의 ${\alpha}$-glucosidase 저해활성을 측정한 결과, Pichia burtonii Y257-7의 무세포 추출물이 가장 높은 저해활성을 보여 시험균주로 최종 선발하였다. ${\alpha}$-glucosidase 저해제 최적 생산 조건을 검토한 결과, Pichia burtonii Y257-7를 $28^{\circ}C$에서 24시간 LB 배지(pH 6.0)에 배양하여 얻은 무세포 추출물에서 가장 높은 ${\alpha}$-glucosidase 저해활성을 보였다. 최적 생산조건에서 얻은 ${\alpha}$-glucosidase 저해물질을 $0.45{\mu}m$$0.2{\mu}m$ syringe filter unit로 여과한 후 Sephadex G-50 column chromatography와 연속 용매 추출을 실시하여 부분정제한 후 일반 쥐와 당뇨유발 쥐를 이용하여 항당뇨 효과를 조사하였다. 정상 쥐와 streptozotocin으로 당뇨를 유발시킨 당뇨유발 쥐에 Pichia burtonii Y257-7이 생산하는 ${\alpha}$-glucosidase 저해제의 부분정제물을 전분과 함께 500 mg/kg, 1000 mg/kg 농도로 경구 투여한 결과, 시판 혈당강하제인 acarbose보다는 효과가 낮았지만 농도 의존적으로 정상 쥐와 당뇨유발 쥐 모두에서 혈당 상승 억제 효과를 확인할 수 있었다.

Streptomyces sp. NS15 배양액에 의한 $\alpha$-Glucosidase 저해 ($\alpha$-Glucosidase Inhibition by Culture Broth of Streptomyces sp. NS15)

  • 백남수;김영만
    • 한국식품영양학회지
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    • 제11권6호
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    • pp.640-646
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    • 1998
  • For the production of nonprotein $\alpha$-glucosidase inhibitor from the Streptomyces sp. NS15 strain, effects of initial optimum pH, nitrogen sources, carbon sources, cationic metal ions, agitation speed and aeration rate were investigated. Initial optimum pH of medium was 7.0. The most effective nitrogen and carbon sources were soybean meal 2.0%(w/v) and glucose 1.6%(w/v), respectively. The cationic metal ins had no stimulating effect on inhibitory activity of $\alpha$-glucosidase except Fe2+. Agitation speed and aeration rate were effective at 400rpm and 1vvm, respectively. In the jar-fermenter cultivation for 4 days under optimal culture conditions, the culture broth showed the inhibitory acitivity of 3,200units/ml, which is 25 times higher than that of basic medium (CYM) for porcine intestinal $\alpha$-glucosidase. The inhibitory activity of $\alpha$-glucosidase reached about 3,200units/ml after 4 days of cultivation and decreased gradually for a further two days.

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Polyopes lancifolia Extract, a Potent α-Glucosidase Inhibitor, Alleviates Postprandial Hyperglycemia in Diabetic Mice

  • Min, Seong Won;Han, Ji Sook
    • Preventive Nutrition and Food Science
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    • 제19권1호
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    • pp.5-9
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    • 2014
  • This study was designed to investigate the inhibitory effects of Polyopes lancifolia extract (PLE) on ${\alpha}$-glucosidase activity, ${\alpha}$-amylase activitiy, and postprandial hyperglycemia in streptozotocin (STZ)-induced diabetic mice. The results of this study revealed a marked inhibitory effect of PLE on ${\alpha}$-glucosidase and ${\alpha}$-amylase activities. The $IC_{50}s$ of PLE against ${\alpha}$-glucosidase and ${\alpha}$-amylase were 0.20 mg/mL and 0.35 mg/mL, respectively. PLE was a more effective inhibitor of ${\alpha}$-glucosidase and ${\alpha}$-amylase activities than acarbose, the positive control. The postprandial blood glucose levels of STZ-induced diabetic mice were significantly lower in the PLE treated group than in the control group. Moreover, PLE administration was associated with a decreased area under the curve for the glucose response in diabetic mice. These results indicate that PLE may be a potent inhibitor of ${\alpha}$-glucosidase and ${\alpha}$-amylase activities and may suppress postprandial hyperglycemia.

토양시료로부터 $\alpha$-glucosidase 저해제 생성 방선균의 분리 (Isolation of $\alpha$-glucosiadase Inhibitor Producing Actinomycetes from Soil Sample)

  • 하남주;최성숙;정남용;김경제
    • 미생물학회지
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    • 제38권2호
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    • pp.139-143
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    • 2002
  • 탄수화물분해 효소인 $\alpha$-glucosidase의 활성을 저해하는 물질을 생성하는 미생물을 검색하기 위하여 토양시료로 부터 수종의 미생물을 검색하였다. 토양 시료에서 강력한 $\alpha$-glucosidase 저해제를 생성하는 방선균PM718을 분리하였고 그 저해제의 활성을 기지물질인 acarbose와 비교 측정한 결과 우수한 활성을 나타냄을 확인하였다. 또한 그 활성은 pH 변화에도 안정된 활성을 유지하는 것을 확인하였다.

Quercetin에 의한 $\alpha$-glucosidase 활성 저해 (Inhibition of $\alpha$-Glucosidase Activity by Quercetin)

  • 이동선;김종국;이상한
    • 한국미생물·생명공학회지
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    • 제34권4호
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    • pp.368-372
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    • 2006
  • Quercetin은 flavonoid 계통의 물질로서 자연계에서 채소나 과일에 매우 흔하다. 또한 인체에서는 radical scavenger로서 신체항상성 뿐만 아니라 직장암의 예방에도 중요한 역할을 한다. Glucosidase를 포함한 glycosidase는 많은 종류의 대사성 질환에 관련이 있다. 유용한 $\alpha$-glucosidase 저해제를 스크리닝 하던 중 chemical library로부터 quercetin을 선별하였다. Quercetin은 $\alpha$-glucosidase에 가역적으로, 느리게 결합하며, 비경쟁적인 저해제인데, $6.3\times10^{-8}$ M의 Ki값을 가진다. 이러한 결과는 비록 기전 연구가 더 필요하지만, quercetin이 당뇨병과 같은 퇴행성 질환을 치료할 수 있다는 잠재성을 보여주는 것이다.

Effect of Paeonia lactiflora Extracts on ${\alpha}-Glucosidase$

  • Lee, Sung-Jin;Ji, Seung-Tack
    • Natural Product Sciences
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    • 제10권5호
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    • pp.223-227
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    • 2004
  • This study was carried out to investigate inhibitory effect of extracts from the root of Paeonia lactiflora on postprandial hyperglycemia. Organic solvent (hexane, ethyl acetate, butanol, aqueous) extracts from the crude drug were fractionated by high performance liquid chromatography. These fractions were examined to evaluate ${\alpha}-glucosidase$ (EC 3. 2. 1. 20) inhibition by microplate colorimetric assay. Among the fractions examined, the ethyl acetate fraction from the roots of Paeonia lactiflora showed potent inhibitory effects on ${\alpha}-glucosidase$. Therefore, further fractionation of the fraction was carried out to isolate the active principles. Finally, we isolated and Purified 1,2,3,4,6-penta-O-galloyl-beta-D-glucose (PGG) as a active principle by activity-guided fractionation. These results suggest that the extract from the root of Paeonia lactiflora can be used as a new nutraceutial for inhibition on postprandial hyperglycemia and PGG might be a candidate for developing an ${\alpha}-glucosidase$ inhibitor.

Penicillium sp.-L4의 균성장 및 효소작용을 억제하는 $\beta$-glucosidase inhibitor의 분리 및 특성

  • 김무성;하성윤;전기붕;임달택;박병화;이보섭;이상린;최영길
    • 한국미생물·생명공학회지
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    • 제25권2호
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    • pp.189-196
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    • 1997
  • A producer of inhibitor against ${\beta}-glucosidase$ of Penicillium sp.-L4 was screened from Actinomycetes, and the isolated strain was identified as Streptomyces sp. The inhibitor produced was very stable against heat, acidic and alkaline conditions, proteolytic and amylolytic enzymes. The inhibotor was purified from culture broth through activated carbon treatment, ultrafiltration, anion and cation exchange, activated carbon columm, acetone precipitation and preparative HPLC. It showed inhibitory activities against a variety of dissacharide hydrolyzing enzymes produced by P.sp.-L4, and the mode of inhibition was competitive. Its structure and molecular formular was elucidated by IR, $^1H\;and\;^{13}C$ NMR and FAB/Mass spectrometry, which was identified as 1-deoxynojirimycin (dNM). dNM showed inhibitory effects on the cell growth and hydrolytic enzyme action of P.sp.-L4 on agar plate and infected lemon peel.

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