• 한국식품과학회지
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• 제37권6호
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• pp.983-988
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• 2005

제주자생 재래감귤종이 하나인 진귤(Citrus sunki Hort. ex Tanaka)의 과피는 전통적으로 매우 중요한 한약재 성분으로 사용되어 왔으나 그 약리학적 효과에 대해서는 과학적인 분석이 되어 있지 못하다. 본 연구에서는 진귤과피추출물과 과피발효 추출물의 1차 항산화활성을 검색하여 발효 후 추출물이 더욱 효과적인 활성을 가지고 있는 사실을 발견하였고 이를 바탕으로 대식세포인 Raw264.7세포에서 산화질소의 생성, 염증유발 단백질(NOS2, Cox-2)의 수준을 억제할 뿐 아니라 동 세포의 생존능을 개선시키는 결과를 얻었다. 그러나 상피세포유래 세포주인 CHO-IR 세포 및 사람의 간암세포주인 HepG2 세포의 생존능은 반대로 발효후 추출물에 의해 억제되는 것으로 나타났다. 이러한 결과들은 진피의 발효후 추출물이 대식세포의 항염증활성을 증가시키는 반면, 종양세포의 증식을 억제하고 세포사멸을 유도하는 다양한 약리효과를 가지고 있음을 의미한다.

• Journal of Nutrition and Health
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• 제48권5호
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• pp.451-456
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• 2015

Purpose: Neuronal apoptotic events induced by aging and hypoxic/ischemic conditions is an important risk factor in neurodegenerative diseases such as ischemia stroke and Alzheimer's disease. The peel of Citrus sunki Hort. ex Tanaka has long been used as a traditional medicine, based on multiple biological activities including anti-oxidant, anti-inflammation, and anti-obesity. In the current study, we examined the actions of fermented C. sunki peel extract against cobalt chloride ($CoCl_2$)-mediated hypoxic death in human neuroblastoma SH-SY5Y cells. Methods: Cell viability was measured by trypan blue exclusion. Expression of apoptosis related proteins and release of cytochrome c were detected by western blot. Production of intracellular reactive oxygen species (ROS) and apoptotic morphology were examined using 2',7'-dichlorofluorescin diacetate (DCF-DA) and 4',6-diamidino-2-phenylindole (DAPI) staining. Results: Exposure to $CoCl_2$, a well-known mimetic agent of hypoxic/ischemic condition, resulted in neuronal cell death via caspase-3 dependent pathway. Extract of fermented C. sunki peel significantly rescued the $CoCl_2$-induced neuronal toxicity with the cell viability and appearance of apoptotic morphology. Cytoprotection with fermented C. sunki peel extract was associated with a decrease in activities of caspase-3 and cleavage of poly (ADP ribose) polymerase (PARP). In addition, increase in the intracellular ROS and release of cytochrome c from mitochondria to the cytosol were inhibited by treatment with extract of fermented C. sunki peel. Conclusion: Based on these data, fermented C. sunki peel extract might have a protective effect against $CoCl_2$-induced neuronal injury partly through generation of ROS and effectors involved in mitochondrial mediated apoptosis.

• Food Science and Biotechnology
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• 제16권2호
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• pp.311-314
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• 2007

Citrus sunki Hort. ex Tanaka is one of several Jeju-native citrus fruits. A number of biological properties for citrus fruits have been suggested, however little is known about those of C. sunki. The present study tested whether fermented product of C. sunki peel (FSP) might affect the activities of enzymes regulating ethanol metabolism. Effects on body weight gain as well as on fatty liver formation were also investigated. The activities of alcohol dehydrogenase and aldehyde dehydrogenase were stimulated remarkably by FSP. Excessive ethanol-induced cytotoxicity was also prevented by FSP in HepG2 cells. FSP decreased the weight gain and fatty liver formation induced by a high-fat diet in mice. From these results, FSP might be a potent source of neutraceuticals useful for preventing ethanol-induced health problems.