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Anti-obesity effect of Ramulus mori extracts and stilbenes in high fat dietfed C57BL/6J mouse

고지방식이를 급여한 C57BL/6J 마우스에서 상지추출물과 스틸벤 화합물의 항비만 효능 연구

  • Park, Jeong-Eun (Department of Food Science and Nutrition, Daegu Catholic University) ;
  • Lee, Geon-Hee (Department of Food Science and Nutrition, Daegu Catholic University) ;
  • Kim, Juhee (Department of Food Science and Nutrition, Daegu Catholic University) ;
  • Choi, Sang-Won (Department of Food Science and Nutrition, Daegu Catholic University) ;
  • Kim, Eunjung (Department of Food Science and Nutrition, Daegu Catholic University)
  • 박정은 (대구가톨릭대학교 식품영양학과) ;
  • 이건희 (대구가톨릭대학교 식품영양학과) ;
  • 김주희 (대구가톨릭대학교 식품영양학과) ;
  • 최상원 (대구가톨릭대학교 식품영양학과) ;
  • 김은정 (대구가톨릭대학교 식품영양학과)
  • Received : 2020.10.14
  • Accepted : 2020.11.12
  • Published : 2020.12.31

Abstract

Purpose: Obesity is a risk factor for various adult diseases such as type 2 diabetes, cardio-cerebrovascular disease, and cancer. With an increasing obesity population worldwide, the prevention of obesity with natural components has emerged as an alternative health care strategy. Ramulus mori (Sangzhi, RM) is widely used as a traditional herbal medicine in East Asia. It contains various phytochemicals, including stilbenes and 2-arylbenzofurans. In this study, we compared the anti-obesity effects of RM extracts and its major stilbene components (mulberroside A [MSA] and oxyresveratrol [ORT]) in high fat diet (HFD)-fed obese mice. Methods: Five week-old, male C57BL/6J mice were grouped into 7 experimental groups: normal diet (ND), HFD, HFD + 1% RM water extracts (MW), HFD + 0.1% MSA, HFD + 1% RM ethanol extracts (ME), HFD + 0.1% ORT, and HFD + 1% Garcinia cambogia extracts (GC) as a positive control. All mice were fed experimental diet for 13 weeks. Results: Compared to the HFD group, total body weight and weekly body weight gain were significantly decreased in the ME, ORT, and GC groups. Glucose tolerance level was significantly decreased in all experimental groups, whereas plasma insulin level was decreased in MSA, ME, ORT and GC groups. Plasma glucose, triglyceride (TG), and total cholesterol levels were significantly decreased, whereas high-density lipoprotein cholesterol levels were increased in the MSA, ORT, and GC groups. Hepatic TG accumulation was also significantly decreased in the MSA, ME, ORT, and GC groups. Adipose tissue weight and size of adipocytes were significantly decreased in the MSA, ME and ORT groups, and were comparable to values obtained in the GC group. The levels of adiponectin and SREBP1c mRNA expressions were increased in the ORT and GC groups. Conclusion: These results indicate that ME, ORT and MSA exert significant anti-obesity effect, and have the potential to be developed as a weight control ingredient of functional foods.

본 연구는 상지추출물과 stilbene 화합물인 MSA, ORT의 항비만 효능을 비교 분석하고자 식이성 비만 마우스 모델을 이용하여 HFD에 실험물질을 첨가한 식이를 13주 동안 급여하였다. 연구결과, 실험물질들의 항비만 효능은 ORT, ME, MSA, MW군 순이었으며, 특히 ME와 ORT의 급여는 고지방식이에 의한 체중 및 체지방 증가, 혈당 증가, 이상지질혈증 및 지방간 개선에 있어 양성대조군인 GC군과 비슷한 효과를 보였다. 향후 관련 기작 규명 및 안전성 확보, 그리고 최대 유효성 도출을 위한 추출 조건 확립 및 용량 검증 등의 연구가 수행된다면 체중조절용 기능성 식품으로의 개발을 기대해 볼 수 있을 것으로 사료된다.

Keywords

Acknowledgement

This work was supported by research grants from Dongil Culture and Scholarship Foundation in 2019

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