• Journal of Microbiology and Biotechnology
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• 제29권4호
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• pp.518-526
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• 2019

Pueraria montana var. lobata is a bioactive substance with various beneficial health effects and has long been extensively used as a traditional medication for the treatment of fever, acute dysentery, diabetes, and cardiovascular diseases in Northeast Asian countries. The purpose of this study was to evaluate the cytoprotective activity of Pueraria montana var. lobata ethanol extract (PLE) for ultraviolet B (UVB)-induced oxidative stress in human dermal fibroblasts (HDF). It was hypothesized that PLE treatment ($25-100{\mu}g/ml$) would reduce intracellular reactive oxygen species (ROS) levels as well as increase collagen production in UVB-irradiated HDF. The results confirmed this theory, with collagen production increasing in the PLE treatment group in a dose-dependent manner. In addition, regulators of cellular ROS accumulation, including HO-1 and NOQ-1, were activated by Nrf2, which was mediated by PLE. Hence, intracellular levels of ROS were also reduced in the PLE treatment group in a dose-dependent manner. In conclusion, PLE increases collagen production and maintains hyaluronic acid (HA) levels in human dermal fibroblasts exposed to UVB-irradiation, thereby inhibiting photoaging.

• 한국응용과학기술학회지
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• 제34권2호
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• pp.418-425
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• 2017

본 연구는 갈근 추출물의 항산화 활성 및 멜라닌세포 효과를 평가하기 위하여 총 폴리페놀 함량, 총 플라보노이드 함량, DPPH radical 소거 활성을 통하여 항산화 활성을 살펴보고, B16F10 melanoma 세포에 대한 세포 독성 및 멜라닌 생합성 억제능 효과를 측정하였다. 연구 결과 B16F10 melanoma 세포에 대해 독성을 나타내지 않았으며, B16F10 melanoma 세포에 ${\alpha}$-MSH로 멜라닌 생성을 유도한 후 멜라닌 생합성 억제능을 측정한 결과 멜라닌의 생성 증가가 농도 의존적으로 억제되는 것을 확인하였다. 항산화 활성에 대한 결과로는, 갈근 추출물은 폴리페놀과 플라보노이드의 함량이 높아 추출물의 농도가 증가함에 따라 DPPH radical 소거 활성이 증가되는 것을 확인하였다. 이와 같은 결과를 통하여 갈근 추출물이 항산화 활성과 멜라닌세포 대한 멜라닌생성억제 효과가 뛰어나고 피부 세포에 대한 독성이 낮으며, 피부의 멜라닌 세포에 대한 안전성이 확인됨에 따라 화장품 소재로서의 가능성을 확인하였다.

• Toxicological Research
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• 제31권2호
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• pp.191-201
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• 2015

We evaluated the inhibitory effect of Pueraria lobata root ethanol extract (PLREE) on lipid accumulation during 3T3-L1 differentiation to adipocytes by measuring the intracellular expression of adipogenic, lipogenic, and lipolytic markers and lipid accumulation. The total polyphenol and flavonoid content of PLREE were 47 and 29 mg/g, respectively. The electron donating capacity of PLREE at $1,000{\mu}g/mL$ was 48.8%. Treatment of 3T3-L1 preadipocytes with 100, 250, or $500{\mu}g/mL$ PLREE for 8 days dose-dependently promoted the differentiation of 3T3-L1 cells. In contrast, the lipid content of PLREE-treated cells was significantly reduced by 7.8% (p < 0.05), 35.6% (p < 0.001), and 42.2% (p < 0.001) following treatment with 100, 250, and $500{\mu}g/mL$ PLREE, respectively, as compared to differentiated control cells. PLREE upregulated peroxisome proliferator-activated receptor ${\gamma}$ mRNA and protein, and sterol regulator element-binding protein-1c mRNA levels, but did not affect CCAAT/enhancer binding-protein ${\beta}$ and ${\alpha}$ mRNA levels. PLREE also downregulated acetyl-CoA carboxylase mRNA and protein, fatty acid synthase (FAS) protein, and leptin mRNA levels, but did not affect FAS mRNA expression. PLREE upregulated adipose triglyceride lipase mRNA and protein expression, and hormone-sensitive lipase (HSL) protein expression, but did not affect HSL mRNA expression. In conclusion, we found that PLREE enhanced adipogenesis, but reduced lipogenesis, resulting in decreased lipid accumulation in 3T3-L1 cells.

• 한국식품저장유통학회지
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• 제24권3호
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• pp.440-445
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• 2017

본 연구에서는 기능성이 증대된 칡 소재 개발을 위하여 로스팅 조건에 따른 칡 추출물을 제조하였으며, 각 추출물에 대한 지표성분 함량 및 항상화 활성 등을 검토하였다. 칡의 지표성분이 puerarin 함량을 로스팅 조건에 따라 분석을 실시하였으며, 그 결과 로스팅 온도와 시간이 늘어남에 따라 puerarin 함량이 증가하는 경향을 나타내었다. 또한, 로스팅 조건에 따른 총 페놀과 플라보노이드 함량의 경우도 puerarin 함량의 결과와 마찬가지로 유사한 경향을 보이고 있었다. 항산화 활성을 평가하기 위하여 ABTS 및 DPPH 라디칼 소거능을 실시하였으며, 전체적으로 로스팅 온도와 시간이 늘어남에 따라 활성이 높아지는 경향을 보여 로스팅 처리한 칡이 일반적인 칡 보다 우수한 것으로 나타났다. 이러한 결과를 종합하여 볼 때 칡을 활용한 기능성 식품 및 다류 개발에 있어서, 로스팅 공정을 적용하는 것이 효과적인 것으로 생각된다.

• Journal of Plant Biotechnology
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• 제43권1호
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• pp.125-131
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• 2016

Pueraria lobata is a perennial legume plant that produces a variety of isoflavones, such as puerarin, daidzin and daidzein. These are metabolized to equol via dihydrodaidzein and tetrahydrodaidzein by the bacterial fermentation of natural isoflavone sources in the human intestines. In this study, we described the growth and accumulation of isoflavone in the hairy root of the Korean wild arrowroot according to the culture period, as well as dihydrodaidzein biosynthesis in hairy root extracts fermented with Pediococcus pentosaceus. Daily proliferation was best in DY1 cultured for 1 week. DY1 showed significant differences in daily production of puerarin and daidzin+daidzein, as compared to DJ7; furthermore, both were best in DY1 cultured for 1 week. The hairy root extract was fermented successfully with P. pentosaceus with confirmed production of dihydrodaidzein, an equol precursor formed by biotransformation. The results indicated that the growth of hairy roots and isoflavone accumulation in the hairy roots is best 1 week after culture. These results are expected to contribute to the mass production of hairy root and isoflavones as equol precursors from the Korean wild arrowroot and provide a basis for equol production by biotransformation in vitro.

• 한국자원식물학회지
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• 제30권3호
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• pp.272-279
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• 2017

EP was obtained through 20% ethanol extraction of Pueraria lobata root, and the fermented form of EP, FEP, was prepared from the EP after incubating with Lactobacillus rhamnosus vitaP1. There was no significant toxicity by EP and FEP up to $1000{\mu}g/ml$ in NIH-3T3, HaCaT, and B16F10 cells. In addition to antioxidant potentials of EP and FEP determined by DPPH and ABST assays, we confirmed increase of procollagen type I and elastin synthesis by supplementation of the EP and FEP at the concentration of $50{\mu}g/ml$ using ELISA kits. The protein expression levels of matrix metalloprotease (MMP)-1, -3, and -9, those are involved in the degradation of collagen or other skin matrix proteins, were remarkably suppressed while their inhibitory protein metallopeptidase inhibitor 1 (TIMP-1) was greatly up-regulated by supplementation of the EP and FEP at a concentration of $50{\mu}g/ml$. Taken together, both EP and FEP supplementation could be involved in the suppression of the skin wrinkle formation through inhibiting degradation of collagen and stimulating the synthesis of collagen and elastin. The results showed that the anti-wrinkle potential of the EP and FEP will be a promising candidate for developing cosmeceutical compounds or products.

• 대한화장품학회지
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• 제48권3호
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• pp.287-293
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• 2022

흰머리는 대표적인 노화의 징후이자 피부, 모발 노화의 특징이다. 내인성 노화, 스트레스, 외부 환경으로 인해 백모가 발생하는데, 조기 백모 발생에는 스트레스가 주요한 요인이 된다고 알려져 있다. 과거 우리는 갈근 추출물이 멜라닌 형성 촉진을 통해 백모를 케어를 할 수 있음을 밝힌 바 있으며, 이에 갈근 추출물이 스트레스에 의한 백모 형성 또한 예방 할 수 있을지 본 연구를 통해 확인하였다. 연구를 위해 멜라닌 생성 주요 전사인자인 MITF 발현을 확인 할 수 있는 세포주를 구축하였다. 스트레스 호르몬 cortisol과 산화 스트레스 유발 인자 H₂O₂를 처리할 경우 MITF 발현이 감소하고, 인체 모낭 조직에서 멜라닌 색소가 감소함을 확인하였다. 여기에 갈근 추출물을 함께 처리할 경우 MITF 발현과 모낭 내 멜라닌 색소 량이 다시 증가하였다. 뿐만 아니라 모낭 내 멜라닌 합성에 관여하는 효소인 TRP-2의 발현도 증가함을 확인할 수 있었다. 이러한 결과를 통해 갈근 추출물은 스트레스 호르몬과 산화 스트레스 자극에 의한 멜라닌 합성 저해도 효과적으로 막아줄 수 있음을 입증하였다.