• Journal of Ginseng Research
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• 제47권3호
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• pp.400-407
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• 2023

Background: Rb3 is a ginsenoside with anti-inflammatory properties in many cell types and has been reported to attenuate inflammation-related metabolic diseases such as insulin resistance, nonalcoholic fatty liver disease, and cardiovascular disease. However, the effect of Rb3 on podocyte apoptosis under hyperlipidemic conditions, which contributes to the development of obesity-mediated renal disease, remains unclear. In the current study, we aimed to investigate the effect of Rb3 on podocyte apoptosis in the presence of palmitate and explore its underlying molecular mechanisms. Methods: Human podocytes (CIHP-1 cells) were exposed to Rb3 in the presence of palmitate as a model of hyperlipidemia. Cell viability was assessed by MTT assay. The effects of Rb3 on the expression of various proteins were analyzed by Western blotting. Apoptosis levels were determined by MTT assay, caspase 3 activity assay, and cleaved caspase 3 expression. Results: We found that Rb3 treatment alleviated the impairment of cell viability and increased caspase 3 activity as well as inflammatory markers in palmitate-treated podocytes. Treatment with Rb3 dosedependently increased PPARδ and SIRT6 expression. Knockdown of PPARδ or SIRT6 reduced the effects of Rb3 on apoptosis as well as inflammation and oxidative stress in cultured podocytes. Conclusions: The current results suggest that Rb3 alleviates inflammation and oxidative stress via PPARδ-or SIRT6-mediated signaling, thereby attenuating apoptosis in podocytes in the presence of palmitate. The present study provides Rb3 as an effective strategy for treating obesity-mediated renal injury.

• 산업식품공학
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• 제22권4호
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• pp.358-365
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• 2018

통곡물 시리얼(Whole grain cereal, WGC)이 함유된 식이는 에너지 대사 조절에 중요한 다량영양소(macronutrients)를 제공한다. 본 연구는 고지방식이(high-fat diet, HFD)로 유발된 비만 마우스를 이용하여 WGC의 근감소성 비만 예방 효과에 대해 평가하였다. C57BL/6N 마우스에 정상식이(normal diet, ND), ND+WGC, HFD, HFD+WGC를 12주 동안 제공하였다. WGC는 체중, 식이효율, 체지방 및 지방세포의 크기를 감소시켰다. 또한, WGC는 간 무게 및 간에 축적된 지방을 감소시킴으로써 HFD에 의한 비알코올성 지방간을 개선시켰다. 더욱이, WGC는 비만 마우스 및 정상 마우스의 근육 무게 및 근력을 증가시켰다. 따라서, WGC는 지방 축적을 억제하고 근육량을 증가시키므로 근감소성 비만 예방을 위한 기능성 식품으로 사용될 수 있을 것으로 기대된다.

• Asian Pacific Journal of Cancer Prevention
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• 제16권9호
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• pp.3595-3604
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• 2015

Hepatocellular carcinoma (HCC) has been one of the most fatal malignant tumors worldwide and its associated morbidity and mortality remain of significant concern. Based on in-depth reviews of serological diagnosis of HCC, in addition to AFP, there are other biomarkers: Lens culinaris agglutinin-reactive AFP (AFP-L3), descarboxyprothrombin (DCP), tyrosine kinase with Ig and eprdermal growth factor (EGF) homology domains 2 (TIE2)-espressing monocytes (TEMs), glypican-3 (GPC3), Golgi protein 73 (GP73), interleukin-6 (IL-6), and squamous cell carcinoma antigen (SCCA) have been proposed as biomarkers for the early detection of HCC. The diagnosis of HCC is primarily based on noninvasive standard imaging methods, such as ultrasound (US), dynamic multiphasic multidetector-row CT (MDCT) and magnetic resonance imaging (MRI). Some experts advocate gadolinium diethyl-enetriamine pentaacetic acid (Gd-EOB-DTPA) MRI and contrast-enhanced US as the promising imaging madalities of choice. With regard to recent advancements in tissue markers, many cuting-edge technologies using genome-wide DNA microarrays, qRT-PCR, and proteomic and inmunostaining studies have been implemented in an attempt to identify markers for early diagnosis of HCC. Only less than half of HCC patients at initial diagnosis are at an early stage treatable with curative options: local ablation, surgical resection, or liver transplant. Transarterial chemoembolization (TACE) is considered the standard of care with palliation for intermediate stage HCC. Recent innovative procedures using drug-eluting-beads and radioembolization using Yttrium-90 may exhibit beneficial effects in HCC treatment. During the past few years, several molecular targeted agents have been evaluated in clinical trials in advanced HCC. Sorafenib is currently the only approved systemic treatment for HCC. It has been approved for the therapy of asymptomatic HCC patients with well-preserved liver function who are not candidates for potentially curative treatments, such as surgical resection or liver transplantation. In the USA, Europe and particularly Japan, hepatitis C virus (HCV) related HCC accounts for most liver cancer, as compared with Asia-Pacific regions, where hepatitis B virus (HBV) may play a more important role in HCC development. HBV vaccination, while a vaccine is not yet available against HCV, has been recognized as a best primary prevention method for HBV-related HCC, although in patients already infected with HBV or HCV, secondary prevention with antiviral therapy is still a reasonable strategy. In addition to HBV and HCV, attention should be paid to other relevant HCC risk factors, including nonalcoholic fatty liver disease due to obesity and diabetes, heavy alcohol consumption, and prolonged aflatoxin exposure. Interestingly, coffee and vitamin K2 have been proven to provide protective effects against HCC. Regarding tertiary prevention of HCC recurrence after surgical resection, addition of antiviral treatment has proven to be a rational strategy.

• 한국자원식물학회지
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• 제28권5호
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• pp.635-640
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• 2015

본 연구는 지방축적이 유도된 HepG2 세포를 이용하여 용아초 EtOAc 분획물의 지방축적억제 효능을 확인하고자 하였다. Oleic acid를 HepG2 세포에 처리하여 지방의 축적을 유도하였으며, 용아초 EtOAc 분획물 25, 50, 100㎍/㎖을 처리하여 실험을 진행하였다. 그 결과 용아초 EtOAc 분획물은 100 ㎍/㎖의 농도에서 HepG2 세포의 지방축적을 효과적으로 억제하였으며, 이 효능의 기전을 확인하기 위하여 지질관련 유전자인 PPAR-α와 PPAR-γ의 발현을 확인하였다. 용아초 EtOAc 분획물은 농도 의존적으로 (25, 50, 100 ㎍/㎖) PPAR-α의 발현을 증가시켰으며, PPAR-γ는 억제함으로써 지질관련 유전자의 발현을 조절하였다. 따라서 용아초 EtOAc 분획물의 지방축적억제 효능은 지방 생성의 주요 인자로 알려진 PPAR-α와 PPAR-γ의 유전자 발현을 통해 작용하는 것으로 보이며, 비교적 저농도인 100 ㎍/㎖에서 효과적으로 지방축적억제 효능을 나타내었으므로 용아초 EtOAc 분획물은 비알콜성 지방간의 위해성을 경감하기 위한 후보물질로서 적합할 것으로 사료되며, 향후 활성성분 규명 및 명확한 작용기전 규명을 통하여 식품, 의약품의 원료에 대한 가능성을 확인할 계획이다.

• Clinical Nutrition Research
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• 제12권3호
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• pp.177-183
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• 2023

Bariatric surgery is the most effective treatment for sustained weight reduction, and it can result in substantial improvements in the severity of type 2 diabetes, metabolic syndrome, nonalcoholic fatty liver disease, and quality of life. However, sleeve gastrectomy, a weight loss surgery that removes two-thirds of the stomach, reduces appetite and nutrient absorption, impairing digestion and the absorption of nutrients like iron, vitamin B₁₂, and protein-bound nutrients. This case study aims to demonstrate that patients undergoing sleeve gastrectomy require long-term and periodic monitoring of biochemical data, weight changes, and caloric and protein intake by a professional nutritionist to prevent malnutrition and nutritional deficiencies. In this case study, a 48-year-old woman was diagnosed with morbid obesity, hypertension, sleep apnea syndrome, and chronic gastritis. At initial evaluation, she was 160 cm tall and weighed 89 kg, with a body mass index of 34.8 kg/m². At 1 postoperative year, she consumed 650 kcal and 25 g of protein per day, the percentage of excess weight loss was 141.1%, and body mass index was 21 kg/m². Compared to preoperative levels, calcium and folic acid levels did not decrease after 1 postoperative year, but hemoglobin, ferritin, and vitamin B₁₂ levels decreased. In conclusion, when patients experience rapid weight loss after sleeve gastrectomy, follow-up should be frequent and long. Dietary education should be conducted according to digestive symptoms, and oral nutritional supplements, including vitamins and minerals.

• Pediatric Gastroenterology, Hepatology & Nutrition
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• 제13권1호
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• pp.51-57
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• 2010

목 적: 뇌하수체저하증 환아들은 비만, 당불내성, 고지질혈증을 포함한 대사증후군의 양상을 보인다. 이 연구의 목적은 뇌하수체저하증과 연관된 소아 지방간질환의 임상 양상과 간조직 소견을 알아보는 것이다. 방 법: 뇌하수체저하증 환자 중에서 비알코올성 지방간질환으로 진단된 소아 11명의 임상자료를 조사하였다. 결 과: 뇌하수체저하증 진단 시 연령은 10.4${\pm}$3.2세였다. 지방간질환 진단 시 연령은 13.1${\pm}$2.7세였다. 두 개인 두종이 뇌하수체저하증의 기저질환 중 가장 흔하였다. 지방간질환 진단 당시 체질량지수 85백분위수 이상이 9명(82%), 금식 시 고혈당이 5명(45%), 고지질혈증이 9명(82%)에서 발견되었다. 신장의 표준편차 점수의 평균은 뇌하수체저하증 진단 시보다 지방간질환 진단시에 유의하게 낮았다. 간생검을 실시한 6명 중에서 1명은 간경변, 2명은 연결 섬유화가 동반된 지방간염, 2명은 경도의 간문맥 섬유화가 동반된 지방간염, 1명은 단순 지방간으로 진단되었다. 결 론: 뇌하수체저하증을 가진 소아는 저신장, 비만, 고지질혈증, 비알코올성 지방간질환이 발생할 위험이 높다. 간조직의 진행된 섬유화가 흔하기 때문에 뇌하수 체저하증 환아에서 지방간질환의 조기 진단이 중요하다.

• Animal Bioscience
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• 제35권11호
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• pp.1787-1799
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• 2022

Objective: Choline deficiency, one main trigger for nonalcoholic fatty liver disease (NAFLD), is closely related to lipid metabolism disorder. Previous study in a choline-deficient model has largely focused on gene expression rather than gene structure, especially sparse are studies regarding to alternative splicing (AS). In modern life science research, primary hepatocytes culture technology facilitates such studies, which can accurately imitate liver activity in vitro and show unique superiority. Whereas limitations to traditional hepatocytes culture technology exist in terms of efficiency and operability. This study pursued an optimization culture method for duck primary hepatocytes to explore AS in choline-deficient model. Methods: We performed an optimization culture method for duck primary hepatocytes with multi-step digestion procedure from Pekin duck embryos. Subsequently a NAFLD model was constructed with choline-free medium. RNA-seq and further analysis by rMATS were performed to identify AS events alterations in choline-deficency duck primary hepatocytes. Results: The results showed E13 (embryonic day 13) to E15 is suitable to obtain hepatocytes, and the viability reached over 95% by trypan blue exclusion assay. Primary hepatocyte retained their biological function as well identified by Periodic Acid-Schiff staining method and Glucose-6-phosphate dehydrogenase activity assay, respectively. Meanwhile, genes of alb and afp and specific protein of albumin were detected to verify cultured hepatocytes. Immunofluorescence was used to evaluate purity of hepatocytes, presenting up to 90%. On this base, choline-deficient model was constructed and displayed significantly increase of intracellular triglyceride and cholesterol as reported previously. Intriguingly, our data suggested that AS events in choline-deficient model were implicated in pivotal biological processes as an aberrant transcriptional regulator, of which 16 genes were involved in lipid metabolism and highly enriched in glycerophospholipid metabolism. Conclusion: An effective and rapid protocol for obtaining duck primary hepatocytes was established, by which our findings manifested choline deficiency could induce the accumulation of lipid and result in aberrant AS events in hepatocytes, providing a novel insight into various AS in the metabolism role of choline.

• Journal of Nutrition and Health
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• 제52권1호
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• pp.17-25
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• 2019

본 연구에서는 댕댕이나무 열매 추출물이 3T3-L1과 마우스 지방유래줄기세포의 지방 분화유도 및 지방생성에 미치는 영향을 살펴보았다. 3T3-L1에 댕댕이나무 열매 추출물을 처리하였을 때, 농도의존적으로 지방구의 생성을 줄였고 지방세포 분화에 있어서 중요한 전사인자인 $PPAR{\gamma}$, $C/EBP{\alpha}$, SREBP1의 발현을 억제시켜 지방 합성이 감소됨을 확인하였다. 또한, 마우스 지방에서 분리한 줄기세포의 지방 분화과정에서도 댕댕이나무 열매 추출물이 $PPAR{\gamma}$, $C/EBP{\alpha}$, SREBP1의 단백질 발현을 감소시켜 지방 축적을 농도 의존적으로 억제하였다. 이상의 결과로 댕댕이나무 열매 추출물은 세포독성이 없는 농도에서 지방 세포의 분화를 억제 하는 것으로 확인되어 항비만 기능성 소재로서의 활용 가능성이 있을 것으로 사료된다.