Hormonal
Skeletal muscle-specific ablation of the core clock gene Bmal1 causes impaired insulin-stimulated glucose uptake and reduced glucose oxidation, primarily through reduced protein levels of GLUT4 and TBC1D1 and altered pyruvate dehydrogenase (PDH) activity.
Your muscles have an internal clock that prepares them to process glucose efficiently during your active/feeding phases. Disrupting this rhythm (e.g., through irregular sleep or eating times) may impair your muscles' ability to take up glucose in response to insulin, even if you are not overweight. Maintaining consistent sleep and meal timing supports optimal muscle insulin sensitivity.
Skeletal muscles from these mice showed impaired insulin-stimulated glucose uptake with reduced protein levels of GLUT4, the insulin-dependent glucose transporter, and TBC1D1, a Rab-GTPase involved in GLUT4 translocation. Pyruvate dehydrogenase (PDH) activity was also reduced due to altered expression of circadian genes Pdk4 and Pdp1... The impaired glucose metabolism induced by muscle-specific Bmal1 knockout suggests that a major physiological role of the muscle clock is to prepare for the transition from the rest/fasting phase to the active/feeding phase, when glucose becomes the predominant fuel for skeletal muscle.
Why this rating
High-quality experimental design using conditional and inducible mouse models with rigorous molecular and functional assays, though limited to murine models.
Source
Muscle insulin sensitivity and glucose metabolism are controlled by the intrinsic muscle clock
Kenneth A. Dyar et al. · Molecular Metabolism · 2013
DOI 10.1016/j.molmet.2013.10.005
Related findings · Hormonal
- Initial treatment for type 2 diabetes should be a combination of metformin and either an SGLT-2 inhibitor or a GLP-1 receptor agonist to achieve cardiorenal protection, rather than monotherapy or older agents like sulfonylureas.Strong
- For patients with specific monogenic obesity syndromes (leptin deficiency, POMC/PCSK1/LEPR mutations), targeted pharmacotherapy (recombinant leptin or setmelanotide) is highly effective and should be prioritized, unlike in polygenic obesity.Strong
- Continued weekly administration of 2.4 mg subcutaneous semaglutide prevents weight regain and promotes further weight loss in adults with overweight or obesity, whereas switching to placebo results in significant weight regain.Strong
This is one finding among thousands. Every one is graded and traced to its source, so you can see what the evidence actually supports. Browse the research →