• Proceedings of the Plant Resources Society of Korea Conference
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• 2019.10a
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• pp.31-31
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• 2019

국립생물자원관 표본관(KB)에 소장된 관속식물 33종(94점)의 기준표본 정보에 대한 자료를 정리하고, 타 기관 또는 대학에서 국립생물자원관으로 기증된 기준표본 정보를 제공하고자 한다. 정기준표본(holotype) 15점, 동기준표본(isotype) 57점, 종기준표본(paratype) 22점이 국립생물자원관에 소장되어 있으며, 서울대학교(SNU), 아주대학교(AJOU), 전북대학교(JNU), 충북대학교(CBU), 한국식물연구원(KPRI), 한림대학교(HHU)의 일부 기준표본이 국립생물자원관으로 새로이 이전되었다. 소장된 기준표본의 종조성은 양치식물 7분류군, 쌍자엽식물 22분류군, 단자엽식물 4분류군으로 확인되었으며, 대표적인 속으로는 제주고사리삼속(한반도 고유속), 현호색속(7분류군)과 물부추속(4분류군) 등이 있다. 소장된 기준표본의 대표적인 명명자로는 김영동 교수, 박종욱 교수, 선병윤 교수, 오병운 교수, 최홍근 교수, 현진오 박사 등이 확인되었다. 국가별로는 28분류군이 한반도산이며, 미얀마와 캄보디아가 각각 2분류군, 라오스산이 1분류군으로 조사되었고, 이중 27분류군이 한반도 고유종으로 평가되었다.

• Proceedings of the Korean Society of Crop Science Conference
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• 2023.04a
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• pp.146-146
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• 2023

• Journal of Marine Bioscience and Biotechnology
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• v.15 no.2
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• pp.59-66
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• 2023

Dictyopteris divaricata, a type of marine brown algae, has been studied for its various biological properties, including anti-inflammatory, antidiabetic, and whitening effects. However, its potential antiobesity effects have not been extensively explored. This study aimed to examine the impact of D. divaricata ethanol extract (DDE) on adipocyte differentiation and adipogenesis using 3T3-L1 preadipocytes. Our results showed that when 3T3-L1 preadipocytes were treated with noncytotoxic concentrations of DDE there was a concentration-dependent decrease in fat accumulation rate and triglycerid production compared with the control. Furthermore, DDE significantly reduced the expression of transcription factors (PPARγ, C/EBPα, and SREBP-1) and fatty acid transport protein (FABP4), which are crucial for 3T3-L1 preadipocyte differentiation. These findings suggest that DDE may exhibit antiobesity effects by suppressing the expression of lipogenic transcription factors and fatty acid transport proteins. Therefore, DDE holds potential as a therapeutic agent for obesity.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2023.04a
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• pp.16-16
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• 2023

Metabolomics is the study of global metabolite profiles in a system (cell, tissue, or organism) under a given set of conditions. Metabolomics has its roots in early metabolite profiling studies but is now a rapidly expanding area of scientific research in its own right. In this study, the applications of metabolomics in natural product studies are explored. Ginseng is a well-known herbal medicine and has various pharmacological effects, which include antiaging, anticancer, antifatigue, memory enhancing, immunomodulatory, and stress reducing effects. Metabolomic analysis of organic acids has not been performed for evaluation whether ginseng has been cultivated using conventional or environmental-friendly farming methods. In this study, profiling analysis was conducted for organic acids (OAs) in ginseng roots produced using conventional or environmentfriendly farming methods at five locations in each of five regions. In OA profiles, lactic acid was the most abundant OA in all regions, with the exception for environmentally friendly farmed ginseng in two of the five regions, in which glycolic acid was most abundant OA. OA profiles in all regions showed isocitric acid levels were increased by environment-friendly cultivation, which suggests metabolic differences associated from farming method, and that isocitric acid might be a useful discriminatory biomarker of environmental-friendly and conventional cultivation. The results of the present study suggest metabolomic studies of OAs in ginseng roots might be useful for monitoring whether ginseng has been cultivated using conventional or environmentally friendly farming methods.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2022.09a
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• pp.114-114
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• 2022

Excessive endogenous endotoxin, especially lipopolysaccharide (LPS) reflux from gastrointestinal (GI) tract to the liver tissue is one of the most serious reasons of severe and acute liver injury which is mainly mediated by Kupffer cell activations. However, there is no clear molecular clues to explain the exact pathophysiological mechanism and effective drugs available till nowadays. We aimed to comprehend the pathophysiological features of LPS-induced liver injury and evaluate the efficacies of potential therapeutic drug, Ga-mi-Yuk-Mi-Jihwang-Tang (GYM), which is composed of herbal plants. GYM remarkably caused to normalize hepatic inflammation and oxidations against LPS-induced liver injury by evidence of serum liver enzymes, histopathological analysis, both hepatic protein and gene expression levels of pro-inflammatory cytokines, nitric oxide levels, and hepatic tissue levels of reactive oxygen species (ROS) levels, malondialdehyde (MDA), and 4-hydroxyneoneal, respectively. To assess molecular events in the hepatic tissue, we further found hepatic Sirtuin6 (Sirt6) levels were considerably depleted by LPS injection with aberrant alterations of Nrf2/HO-1 signaling pathways, whereas administration with GYM notably exerted to normalize these abnormalities. Our results exhibited that GYM would be one of target drug to diminish hepatic inflammation as well as oxidative stress by regulation of hepatic Sirt6 levels.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2022.09a
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• pp.125-125
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• 2022

식물 내에는 배당체 형태의 생리활성 물질들이 다량 존재하고 있으며, 비배당체로 전환하였을 경우 생리활성이나 투과성이 증대된다는 연구들이 보고되어 있다. 따라서 본 연구에서는 고활성 β-glucosidase 활성을 갖는 균주를 선별함으로써 식물 내의 비배당체 활성 성분을 증대시키는 데 활용하고자 한다. 균주는 전남지역 제조된 막걸리부터 분리하였다. 분리된 균주는 성장 속도 등 산업적으로 활용될 수 있는 가치를 평가하여 11종 22점의 균주를 분리하고, 16S rRNA분석을 통해 균주를 동정하였다. 동정된 균주를 이용하여 β-glucosidase의 활성을 평가하여 고활성 균주를 1종을 선별하였다. 선별된 균주는 다른 균주에 비하여 상대적 활성이 57% ~ 99%정도 활성이 높았으며, 공시 균주와 비교하였을 때도 상대 활성이 높은 았다. 선별된 균주의 특성을 규명하기 위하여 glycerol, L-arbinose를 비롯한 49가지의 탄수화물의 대사 활성을 확인해본 결과 25가지의 탄수화물 대사 활성을 가지고 있는 것을 알수 있었다. 또한 Lipase, β-glucosidase 19가지의 다양한 효소활성을 확인해본 결과 8종의 효소활성이 있음을 확인할 수 있었다.

• Journal of Marine Bioscience and Biotechnology
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• v.15 no.1
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• pp.1-11
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• 2023

In the present study, the antioxidant and anti-inflammatory activities of ethanolic extracts from Lathyrus japonicus at concentrations of 50, 100, and 200 ㎍/mL were investigated in LPS-stimulated, RAW264.7 cells. Antioxidant properties were determined using 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) radical scavenging assays and ferric reducing antioxidant power assay. In addition, the production of reactive oxygen species (ROS) was measured using the 2',7'-dichlorofluorescein diacetate (DCFH-DA) probe by flow cytometry. To examine the anti-inflammatory activity of the extracts of L. japonicus, their effects on the levels of nitric oxide (NO); production of cytokines such as interleukin (IL)-1β, IL-10, and tumor necrosis factor-α (TNF-α); and the activities of enzymes such as inducible NOS (iNOS) and cyclooxygenase-2 (COX-2) were assessed. The IC₅₀ values of the DPPH and ABTS radical scavenging assays were 476.09 ± 1.50 and 34.91 ± 0.37 ㎍/mL, respectively. In addition, L. japonicus extracts not only inhibited ROS production, but also the production of NO, IL-1β, and IL-10, and the activity of iNOS in a dose-dependent manner. In summary, the ethanolic extracts of L. japonicus could be used as a functional food additive and an anti-inflammatory agent owing to their antioxidant and anti-inflammatory activities

• Proceedings of the Plant Resources Society of Korea Conference
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• 2023.04a
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• pp.50-50
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• 2023

Prostaglandin E2(PGE2), a major product of cyclooxygenase-2 (COX-2), plays an important role in the carcinogenesis of many solid tumors, including colorectal cancer. Because PGE2 functions by signaling through PGE2 receptors (Eps), which regulate tumor cell growth, invasion, and migration, there has been a growing amount of interest in the therapeutic potential of targeting Eps. In the present study, we investigated the role of EP4 on the effectiveness of cordycepin in inhibititing the migration and invasion of HCT116 human colorectal carcinoma cells. Our data indicate that cordycepin suppressed lipopolysaccharide (LPS)-enhanced cell migration and invasion through the inactivation of matrix metalloproteinases (MMP)-9 as well as the down-regulation of COX-2 expression and PGE2 production. These events were shown to be associated with the inactivation of EP4 and activation of AMP-activated protein kinase (AMPK). Moreover, the AMPK inhibitor, compound C, as well as AMPK knockdown via siRNA, attenuated the cordycepin-induced inhibition of EP4 expression. Cordycepin treatment also reduced the activation of CREB. These findings indicate that cordycepin suppresses the migration and invasion of HCT116 cells. Through modulating EP4 expression and the AMPK-CREB signaling pathway. Therefore, cordycepin has the potential to serve as a potent anti-cancer agent in therapeutic strategies against colorectal cancer metastasis.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2023.04a
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• pp.51-51
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• 2023

The world-wide rate of obesity is increasing continuously, representing a serious medical threat since it is associated with a variety of diseases including type 2 diabetes, cardiovascular disease, and numerous cancers. Sophora japonicais used as a traditional herb for medicinal purposes in eastern Asia. However, the anti-obesity effects of S. japonicafruit have not been explored. The aim of this study is to investigate the inhibition of adipocyte differentiation and adipogenesis by an ethanol extract of S. japonicafruit (EESF) in 3T3-L1 pre-adipocytes. Our results demonstrate that EESF suppressed the terminal differentiation of 3T3-L1 pre-adipocytes in a dose-dependent manner, as confirmed by a decrease in lipid droplet number and lipid content through Oil Red O staining. EESF significantly reduced the accumulation of cellular triglyceride, which was associated with a significant inhibition of the levels of pro-adipogenic transcription factors, including PPARγ, C/EBPα and C/EBPβ. In addition, EESF potentially down regulated the expression levels of adipocyte-specific proteins, including aP2 and leptin. In particular, EESF treatment effectively enhanced the activation of the AMPK signaling pathway; however, the co-treatment with compound C, an inhibitor of AMPK, significantly restored the EESF-induced inhibition of pro-adipogenic transcription factors and adipocyte-specific genes. These results indicate that EESF may exert an anti-obesity effect by controlling the AMPK signaling pathway, suggesting that the fruit extract of S. japonica may be a potential anti-obesity agent.

• Korean journal of applied entomology
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• v.61 no.2
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• pp.289-291
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• 2022

The genus Euploea Fabricius is reported from Korea with an unrecorded species, E. eunice (Godart) for the first time. Illustraion of adult and genitalia of examined species provided, with all available information. DNA barcode sequence for precise identification of the species is also provided.