College of Korean Medicine, Kyung Hee University, Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Republic of Korea.
Department of Science in Korean Medicine, Graduate School, Kyung Hee University, Seoul 02447, Republic of Korea.
Int J Mol Sci. 2024 Aug 6;25(16):8572. doi: 10.3390/ijms25168572.
This study investigated the effects of Mill (LCM) extract on obesity and diabetes, using both in vitro and high-fat diet (HFD)-induced obesity mouse models. We found that LCM notably enhanced glucagon-like peptide-1 (GLP-1) secretion in NCI-h716 cells from 411.4 ± 10.75 pg/mL to 411.4 ± 10.75 pg/mL compared to NT (78.0 ± 0.67 pg/mL) without causing cytotoxicity, implying the involvement of Protein Kinase A C (PKA C) and AMP-activated protein kinase (AMPK) in its action mechanism. LCM also decreased lipid droplets and lowered the expression of adipogenic and lipogenic indicators, such as Fatty Acid Synthase (FAS), Fatty Acid-Binding Protein 4 (FABP4), and Sterol Regulatory Element-Binding Protein 1c (SREBP1c), indicating the suppression of adipocyte differentiation and lipid accumulation. LCM administration to HFD mice resulted in significant weight loss (41.5 ± 3.3 g) compared to the HFD group (45.1 ± 1.8 g). In addition, improved glucose tolerance and serum lipid profiles demonstrated the ability to counteract obesity-related metabolic issues. Additionally, LCM exhibited hepatoprotective properties by reducing hepatic lipid accumulation and diminishing white adipose tissue mass and adipocyte size, thereby demonstrating its effectiveness against hepatic steatosis and adipocyte hypertrophy. These findings show that LCM can be efficiently used as a natural material to treat obesity and diabetes, providing a new approach for remedial and therapeutic purposes.
本研究采用体外实验和高脂肪饮食(HFD)诱导肥胖小鼠模型,探讨了米糠(LCM)提取物对肥胖和糖尿病的影响。结果表明,LCM 能显著促进 NCI-h716 细胞分泌胰高血糖素样肽-1(GLP-1),由 NT(78.0±0.67pg/mL)增加至 411.4±10.75pg/mL,且无细胞毒性,提示蛋白激酶 A C(PKA C)和 AMP 激活蛋白激酶(AMPK)可能参与了其作用机制。LCM 还能减少脂滴,降低脂肪生成和脂类指标的表达,如脂肪酸合酶(FAS)、脂肪酸结合蛋白 4(FABP4)和固醇调节元件结合蛋白 1c(SREBP1c),表明其能抑制脂肪细胞分化和脂质积累。给予 HFD 小鼠 LCM 后,体重明显减轻(41.5±3.3g),与 HFD 组(45.1±1.8g)相比差异有统计学意义。此外,改善的葡萄糖耐量和血清脂质谱表明其具有对抗肥胖相关代谢问题的能力。此外,LCM 还具有保肝作用,能减少肝内脂质积聚,减少白色脂肪组织质量和脂肪细胞大小,从而有效对抗肝脂肪变性和脂肪细胞肥大。这些发现表明,LCM 可作为一种天然物质有效治疗肥胖和糖尿病,为治疗和预防提供了一种新方法。