• 한국식품저장유통학회지
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• 제30권3호
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• pp.538-545
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• 2023

본 연구는 probiotics mixture(Lactobacillus acidophilus PBS066(DSM 24936), Lactiplantibacillus plantarum PBS067(DSM 24937), Limosilactobacillus reuteri PBS072(DSM 25175))의 안전성 및 탄수화물 소화 효소 저해 효과를 in vitro로 평가하는 것을 목적으로 한다. 모든 균주는 유럽식품안전처(EFSA) 지침에서 권장하는 항생제 내성 프로필을 충족시켰으며, 모든 균주는 용혈 활성 및 세포 독성을 나타내지 않았다. Probiotics mixture, L. plantarum PBS067 그리고 L. reuteri PBS072는 α-amylase 활성을 억제하는 것으로 나타났으며, probiotics mixture와 이의 균주 3종 모두 α-glucosidase 활성을 억제하는 것으로 나타났다. 이로써 본 연구에 사용한 probiotics mixture 및 이의 단일 균주 3종의 안전성과 탄수화물 소화 억제 효과를 확인하였으며, 따라서 probiotics mixture 이의 단일 균주 3종은 섭취하여도 안전하며 섭취 시 체내 탄수화물 대사를 잠재적으로 조절하는 것을 확인하였다.

• 한국식품저장유통학회지
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• 제24권5호
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• pp.673-679
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• 2017

본 연구에서는 해양미세조류 A. carterae의 기능성 평가를 위해 에탄올 추출을 하였고, 기존의 건강기능성식품인 클로렐라를 에탄올 추출하여 기능성을 비교하였다. 클로렐라 에탄올 추출물(CE)과 A. carterae 에탄올 추출물(AE)의 총페놀성 화합물은 각각 47.39 mg/g과 8.88 mg/g 으로 CE가 5.33배 높았으나, DPPH 라디컬소거능은 22.42%와 20.16%로 비슷한 수준이었다. 반면에 CE와 AE의 ABTS 라디컬 소거능은 각각 28.58%와 17.69%로 CE가 높아 CE의 항산화능은 페놀성 화합물의 효과로 판단된다. AE(10 mg/mL)의 항균활성은 그람음성균 6종과 그람양성균 10종에서 확인하였다. 그리고 CE(10 mg/mL)의 항균활성은 그람음성균 3종과 그람양성균 3종에서 확인되었다. ${\alpha}$-glucosidase의 억제활성은 AE($500{\mu}g/mL$)에서 82.07%이었고, CE는 효소활성을 촉진하는 것으로 나타났다. 암세포 생장억제활성은 $125{\mu}g/mL$ 농도의 AE를 첨가했을 때, HepG2와 HT-29의 생존율이 각각 38%와 11.27%이었다. $31.25-125{\mu}g/mL$의 농도범위에서 CE 첨가가 HepG2와 HT-29의 생장을 촉진하는 것으로 확인되었다. 이와 같은 결과를 종합하면, A. carterae 에탄올 추출물은 페놀성 화합물 이외의 항산화 물질을 보유하고, 항균활성, 항당뇨효과와 암세포 억제활성이 우수한 기능성 물질을 함유하고 있는 것으로 판단되어 기능성 소재로써의 활용가치가 높을 것으로 판단된다.

• KSBB Journal
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• 제28권2호
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• pp.137-145
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• 2013

In order to develop new skin whitening agents, we prepared the $CH_2Cl_2$ layer (NGC) and BuOH layer (NGB) of 75% EtOH extract of the Nelumbinis nucifera Gaertner. We measured their tyrosinase inhibitory activity in vitro and melanin synthesis inhibitory activity in B16-F1 melanoma cells. They did not show inhibitory activity against mushroom tyrosinase but showed melanin synthesis inhibitory activity in a dose-dependent manner. In a melanin synthesis inhibition assay, NGC and NGB suppressed melanin production up to 52% and 46% at a concentration of $100{\mu}g/mL$, respectively. To elucidate the mechanism of the inhibitory effects of NGC and NGB on melanogenesis, we measured the expression of melanogenesis-related proteins by western blot assay. As a result, NGC suppressed the expression of tyrosinase, tyrosinase related protein 1 (TRP-1), tyrosinase related protein 2 (TRP-2), phosphorylated cAMP responsive element binding (p-CREB) protein, and microphthalmia associated transcription factor (MITF). And NGB inhibited the protein expression of tyrosinase and MITF, but had no significant effect on TRP-1, TRP-2, and p-CREB expression. Moreover, NGB increased the expression of phosphorylated extracellular signal-regulated kinase (p-ERK). In addition, we examined the inhibitory effect on the glycosylation of tyrosinase. As a result, NGC and NGB inhibited the activity of ${\alpha}$-glucosidase in vitro and the glycosylation of tyrosinase in B16-F1 melanoma cells. From these results, we concluded that NGC and NGB could be used as active ingredients for skin whitening.

• 생명과학회지
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• 제33권10호
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• pp.783-790
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• 2023

현대인들의 식습관 변화로 인해 대사성 질환의 발생률이 증가하고 있으며, 특히 당뇨병이 가장 큰 문제로 꼽힌다. 하지만 기존의 당뇨병 치료제는 부작용을 동반하고 있어서 예로부터 쓰이던 천연물을 통해 부작용이 적은 항당뇨 활성 물질을 찾고자 하였다. 따라서 본 실험에서는 항당뇨 및 항산화 활성이 있는 천연물을 탐색하기 위하여, DPPH free radical scavenging assay와 α-glucosidase 및 PTP1B inhibition assay를 이용하였다. 항당뇨 효능이 예상되는 12가지의 시료를 메탄올로 추출하고 항당뇨 활성 및 항산화 활성을 측정하였다. 그 중 항당뇨 활성이 우수한 느릅나무, 벌나무 가지, 연 씨앗, 홍화 씨앗 등의 4가지 시료를 대상으로 에틸아세테이트, 부탄올을 이용하여 활성물질을 용매추출하여 항당뇨 활성을 측정하였다. 그 결과, α-glucosidase와 PTP1B 저해활성이 우수한 홍화 씨앗의 에틸아세테이트 분획물(MG-11-E)을 선정하였다. MG-11-E를 대상으로 preparative thin layer chromatography를 수행한 결과, 분획물 #6에서 α-glucosidase 및 PTP1B에 대한 우수한 저해활성을 보였다. 50% 메탄올을 이동상으로 하여 TLC 분획물 #6을 high performance liquid chromatography하여 각각을 분획하고 항당뇨 활성을 측정한 결과, 단일 peak를 보인 RT 4분에서 항당뇨 활성이 확인되었다. 따라서 홍화 씨앗의 추출물의 항당뇨 효능을 나타내는 항당뇨 활성 성분은 PTP1B 보다 α-glucosidase에 대한 저해 활성이 더욱 강하게 나타나 PTP1B를 저해하는 천연물과 조합하여 사용함으로써 당뇨병에 대한 효과를 높일 수 있을 것으로 사료된다.

• 한국축산식품학회지
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• 제38권3호
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• pp.554-569
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• 2018

This study aimed to investigate the physiological characteristics and anti-obesity effects of Lactobacillus plantarum K10. The ${\alpha}-amylase$ inhibitory activity, ${\alpha}-glucosidase$ inhibitory activity, and lipase inhibitory activity of L. plantarum K10 was $94.66{\pm}4.34%$, $99.78{\pm}0.12%$, and $87.40{\pm}1.41%$, respectively. Moreover, the strain inhibited the adipocyte differentiation of 3T3-L1 cells ($32.61{\pm}8.32%$) at a concentration of $100{\mu}g/mL$. In order to determine its potential for use as a probiotic, we investigated the physiological characteristics of L. plantarum K10. L. plantarum K10 was resistant to gentamycin, kanamycin, streptomycin, ampicillin, ciprofloxacin, tetracycline, vancomycin, and chloramphenicol. It also showed higher Leucine arylamidase, Valine arylamidase, and ${\beta}-galactosidase$ activities. Moreover, it was comparatively tolerant to bile juice and acid, exhibiting resistance to Escherichia coli, Salmonella Typhimurium, Listeria monocytogenes, and Staphylococcus aureus with rates of 90.71%, 11.86%, 14.19%, and 23.08%, respectively. The strain did not produce biogenic amines and showed higher adhesion to HT-29 cells compared to L. rhamnosus GG. As a result of the animal study, L. plantarum K10 showed significantly lower body weight compared to the high-fat diet group. The administration of L. plantarum K10 resulted in a reduction of subcutaneous fat mass and mesenteric fat mass compared to the high-fat diet (HFD) group. L. plantarum K10 also showed improvement in gut permeability compared to the HFD positive control group. These results demonstrate that L. plantarum K10 has potential as a probiotic with anti-obesity effects.

• 한국생활과학회지
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• 제24권5호
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• pp.713-723
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• 2015

This study was performed to investigate the physicochemical activities such as mineral contents, antioxidantant activities, ${\partial}$-glucosidase activity, and angiotensin I-converting enzyme(ACE) inhibitory effect of Dangmyon (starch vermicelli) prepared with mulberry leaves powder. Mulberry leaves powder was added in ratio (w/w) of 0% (CON), 0.5% (MD1), 1.0% (MD2), 1.5% (MD3), and 2.0% (MD4), and then mineral contents, total polyphenol contents, antioxidant, antidiabetic, and antihypertensive activities of the Dangmyon were measured. The mineral contents were significantly increased by the addition of mulberry leaves powder (p<0.001). The total polyphenol contents and antioxidant activities of Dangmyon were significantly increased by the addition of mulberry leaves powder (p<0.05). In terms of antidiabetic and antihypertensive activities showed MD1~MD4 samples higher contents of ACE and ${\alpha}$-glucosidase compared to control (p<0.05). Our findings suggest that addition of mulberry leaves powder to Dangmyon may improve the effects of anti-oxidation, anti-DM, and anti-hypertension and provide health benefits of consumers.

• 생약학회지
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• 제35권1호통권136호
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• pp.92-97
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• 2004

Effect of AGI $({\alpha}-Glucosidase\;Inhibitor)-1120$, pine (Pinus densiflora) bark extract and Chaga mushroom (Inonotus obliquus) - and Chaga mushroom mycelium extracts on cellular $NF-{\kappa}B$ activation in malignant human keratinocytes (SCC-13) were evaluated to elucidate the possible correlation of $NF-{\kappa}B$ with antioxidant activity. The antioxidant activities of these natural products were examined in three different evaluation methods, i.e., lipid peroxidation value (POV) evaluation test, and 1,1diphenyl-2-picrylhydrazyl radical (DPPH) and nitric oxide (NO) scavenging test. In a cell-based $NF-{\kappa}B$ monitoring assay systern, all samples revealed the downregulatory profiles on the cellular $NF-{\kappa}B$ activity. AGI -1120 (1, 2 mg) and Chaga mushroom extract (0.05, 0.1 mg) downregulated the $NF-{\kappa}B$ activity in a dose-dependent manner. Chaga mushroom mycelium extract (5 mg) significantly inhibited the $NF-{\kappa}B$ activity (p<0.05). Although AGI-1120 and Chaga mushroom mycelium extract exhibited no antioxidant activities evaluated in pay, Chaga mushroom extract showed antioxidant in a dose-dependent manner at concentrations of $0.05{\sim}1$ mg. While AGI-1120 and Chaga mushroom extract possessed a relatively potential DPPH radical scavenging activity, the NO scavenging activity of Chaga mushroom extract $(SC_{50}:47\;{mu}g)$ was higher than the known antioxidant, vitamin C $(SC_{50}:77\;{mu}g)$. These results suggest that AGI-1120 and Chaga mushroom- and Chaga mushroom mycelium extracts may serve as an useful radical scavenging antioxidant agents with $NF-{\kappa}B$ inhibitory effect in human skin.

• 방사선산업학회지
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• 제7권2_3호
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• pp.183-190
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• 2013

Mistletoe (Viscum album) has been widely used as a functional food material for various therapeutic purposes from ancient time. In this study, we examined anti-diabetic and cytotoxic activities of heated-treated mistletoe and the effects of gamma-irradiation on its activities. Heat-treated mistletoe extract was prepared by heating during different time (3, 6, 9 and 12 h) and gamma-irradiated with different doses of 0, 10, 30, 50, 70 and 100 kGy. Heat-treated mistletoe extracts showed a concentration-dependent cytotoxicity on rat insulinoma RINm5F cells and the effect was gradually decreased as heating time increased up to 12 h. 12 h heat-treated extract was no cytotoxic. Gamma-irradiation enhanced the reduction of heat-treated mistletoe-induced cytotoxicity and the decreasing effect was an irradiating dose-dependent. In particular, all of 70 kGy irradiated and heat-treated mistletoe extracts did not showed the cytotoxicity and the effect was comparable to 12 h heat-treated mistletoe extract. Among those extracts, 3 h heat-treated mistletoe extract gradually increased the insulin secreting activity by gamma-irradiation and the effect was the best at 70 kGy, whereas 12 heat-treated extract was no effect. On the test of ${\alpha}$-glucosidase inhibitory activity, 3 h heat-treated mistletoe extract showed the concentration dependent effects and gamma-irradiation induced more activity at 70 kGy, compared to non-irradiated 3 h and 12 h heated mistletoe extracts. These results suggest that the combination of heat treatment and gamma-irradiation might be more effective than only heat-treatment for improving the anti-diabetic activity of mistletoe extract and reducing its cytotoxicity.

• Journal of Nutrition and Health
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• 제49권1호
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• pp.18-27
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• 2016

상지 및 상백피 추출물의 식후혈당조절 효과를 확인하기 위하여 Caco-2세포와 Streptozotocin 당뇨유발 동물을 사용하여 시험하였다. Caco-2 세포를 이용하여 상지 상백피 추출물의 포도당 및 과당 흡수 저해 능력을 확인하였으며, 특히 과당 흡수를 저해하는 효과가 강하게 나타났다. 말토오스와 수크로오스를 이용한 ${\alpha}-glucosidase$ 분석을 통해 상지와 상백피 추출물 모두 수크로오스에 대한 ${\alpha}-glucosidase$의 강한 저해활성을 보였다. 시험동물 모델에서는 당뇨 유도를 위해 앞서 2주간 고지방 식이를 급여하였으며, streptozotocin 복강투여 후 공복혈당이 126 mg/dL 이상을 기준으로 하여 당뇨 유도모델이 형성되었음을 확인하였다. 상지 및 상백피 추추물을 단회투여 하여 경구 당부하 검사 결과, 30분대에서 당뇨유도군과 비교했을 때 상지와 상백피 추출물 섭취군에서 모두 혈당이 유의적으로 감소하였다. 또한 28일간 경구투여하여 경구당부하를 측정하였을 때 최고혈중농도에 도달하는 시간을 지연시키는 것으로 관찰되었다. 이상의 결과로 상지 및 상백피 추출물은 식후혈당 조절을 통해 항당뇨 효과를 갖음을 알 수 있었으며, 이는 혈당강하를 목적으로 한 기능성 소재 개발 가능성으로 판단된다. 향후에는 상지 및 상백피 추출물이 췌장 및 간에서 혈당조절에 미치는 영향을 메커니즘 분석을 통해 추가적으로 연구해야 할 것으로 사료된다.

• 한국자원식물학회지
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• 제31권4호
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• pp.312-321
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• 2018

Angelica tenuissima, also known as Ligusticum tenuissimum, is classified as a food-related plant and has been used as traditional medicines treating headache and anemia in Asia. However, its anti-melanogenic effect has not been reported in detail. When the extract of Angelica tenuissima (ATE) was prepared by the extraction with 70% EtOH at $80^{\circ}C$ (final yield = 22%), the contents of decursin and Z-ligustilide in ATE were determined 0.06% and 8.43%, respectively. Total flavonoid and phenolic content in mg ATE were $5.52{\pm}0.07{\mu}g$ quercetin equivalents and $237.27{\pm}13.24{\mu}g$ gallic acid equivalents, respectively. Antioxidant capacity of ATE determined by DPPH and ABTS assay was increased with a dose dependent manner up to $1000{\mu}g/m{\ell}$. The amount of melanin synthesis followed by ${\alpha}-melanocyte$ stimulating hormone on B16F10 cells were significantly reduced in the presence of ATE (250 to $1000{\mu}g/m{\ell}$, p<0.05). ATE (125 to $1000{\mu}g/m{\ell}$, p<0.05) suppressed the tyrosinase activity but did not show any significant effect on ${\alpha}-glucosidase$ activity at the same condition. Taken together, ATE possesses tyrosinase inhibitory potential with significant antioxidant capacities. These effects of ATE might be involved in suppression of melanin synthesis, at least, in B16F10 cells. The anti-melanogenic potential of ATE will provide an insight into developing a new skin whitening product.