Evidence mapPaperPMID 42484698Full record

ArticleMolecular biology reports2026

Stephanoside B modulates metabolic gene expression and lengthens the circadian bmal1 oscillation period in differentiated myotubes revealed by real-time bioluminescence.

Papawee Saiki, Tatsunosuke Tomita, Saori Yamamoto, Fatikah Luebaeteh

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Article in Molecular biology reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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5 · Who and what money

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4 authors.

Papawee SaikiCellular and Molecular Biotechnology Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, 305-8565, Ibaraki, Japan. papawee-saiki@aist.go.jp.ORCID https://orcid.org/0000-0002-9028-2640
Tatsunosuke TomitaCellular and Molecular Biotechnology Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, 305-8565, Ibaraki, Japan. tatsunosuke-tomita@aist.go.jp.
Saori YamamotoCellular and Molecular Biotechnology Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, 305-8565, Ibaraki, Japan.
Fatikah LuebaetehDepartment of Bioscience and Bioinnovation for Sustainability, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundGymnema (G.) inodorum is a medicinal plant with anti-diabetic, anti-obesity, and anti-inflammatory properties traditionally consumed as tea in Southeast Asia. While bioactive stephanosides and gymnemic acids suppress adipocyte differentiation, their effects on skeletal muscle metabolism and circadian regulation remain unclear. This study investigated the effects of gymnemic acid (GiA-7) and stephanosides B and C in differentiated C2C12 myotubes. METHODS AND

resultsDifferentiated C2C12 myotubes were treated with GiA-7 and stephanosides B and C, and gene expression was analyzed by quantitative reverse transcription polymerase chain reaction. Stephanoside B selectively and concentration-dependently increased the expression of Pparg and Ppargc1a under basal conditions and after dexamethasone-induced circadian synchronization. It also increased the expression of the core clock genes Nr1d1, Per2, and Cry1, while decreasing Bmal1, consistent with known PPARγ-circadian interactions. To directly monitor circadian rhythmicity, we established a real-time Bmal1-luciferase reporter gene assay in differentiated myotubes. Continuous bioluminescence tracking over several days revealed that stephanoside B specifically lengthened the circadian period, demonstrating an effect on molecular clock function.

conclusionsStephanoside B is associated with coordinated changes in metabolic gene expression and circadian parameters in skeletal muscle cells. These findings suggest a potential role of G. inodorum-derived compounds in modulating muscle circadian regulation at the cellular level. This study also provides a practical real-time analytical platform for evaluating dietary compounds that influence skeletal muscle circadian dynamics.

Indexed as

ARNTL Transcription FactorsCircadian RhythmMuscle Fibers, SkeletalSaponinsTriterpenesAnimalsCell DifferentiationCell LineCircadian ClocksGene Expression RegulationLuminescent MeasurementsMiceMuscle, SkeletalPPAR gammaARNTL Transcription FactorsBmal1 protein, mousePPAR gammaSaponinsTriterpenesBmal1-luciferase reporterCircadian regulationMetabolic gene regulationPPARγ signalingSkeletal muscle metabolismStephanoside B

Identifiers

PMID42484698
PMCPMC13391777

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.