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Type 2 diabetes mellitus is characterized by impaired glucose uptake in skeletal muscle, and the AMP-activated protein kinase (AMPK) is a relevant target for metabolic improvement. This study evaluated whether ethanol extracts and polarity-based solvent fractions of Lespedeza cuneata enhance AMPK activation and glucose uptake in differentiated L6 myotubes and whether extraction ethanol ratio relates to bioactivity. Whole-plant material was extracted with 70% ethanol and partitioned to obtain solvent fractions, including a hexane fraction (LC-H). The AMPK signaling was assessed by Western blot analysis of phosphorylated AMPK and acetyl-CoA carboxylase (ACC), and glucose uptake was quantified using the glucose uptake assay kit. Ethanol extracts increased p-AMPK and p-ACC relative to control, and LC-H induced concentration-dependent phosphorylation of AMPK/ACC. Consistently, LC-H increased glucose uptake in a dose-dependent manner, with the greatest effect at 200 μg/ml (21.4% over control). In addition, extracts prepared with higher ethanol content tended to elicit greater glucose-uptake activity than those prepared with lower ethanol content, indicating that extraction solvent composition and fraction polarity influence recovery of active constituents. Collectively, these findings suggest that L. cuneata ethanol extracts and the hexane fraction enhance AMPK signaling and increase glucose uptake in L6 myotubes, supporting L. cuneata as a candidate natural resource for skeletal-muscle-targeted metabolic improvement and providing a basis for subsequent constituent identification and mechanism-oriented studies.

권호기사

권호기사 목록 테이블로 기사명, 저자명, 페이지, 원문, 기사목차 순으로 되어있습니다.
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