Mitochondrial Function and Energy Research
Preclinical investigation of compounds studied for AMPK activation, mitochondrial biogenesis, NAD+ metabolism, and metabolic energy signaling in rodent and cell-based models.
Research Overview
Mitochondrial function and energy research examines peptide and small molecule compounds that interact with mitochondrial biology, cellular energy sensing, and metabolic pathway regulation in preclinical model systems. The primary research platforms include primary mouse and rat skeletal muscle cell cultures and isolated mitochondria preparations, Seahorse XF bioanalyzer-based oxygen consumption studies, aged murine cohort studies, and systemic metabolic phenotyping in rodent models with defined dietary interventions. MOTS-c research by Lee and Chang colleagues (Cell Metabolism, 2015) established the mitochondrial-encoded peptide concept and documented AMPK-dependent metabolic improvements in murine skeletal muscle. NAD+ precursor research by Sinclair, Guarente, and Verdin laboratory groups across multiple institutional settings has documented sirtuin activation, mitochondrial biogenesis, and energetic improvements in aged rodent tissues. Epithalon studies by Khavinson and colleagues have examined mitochondrial membrane potential and oxidative stress markers in aging cell systems.
Key Research Findings
Findings from preclinical in vitro and in vivo model systems. All summaries reference published research models.
MOTS-c AMPK Activation and Glucose Metabolism in Murine Skeletal Muscle
Lee et al. (Cell Metabolism, 2015) documented that exogenous MOTS-c administration in C57BL/6 mice activated AMPK in skeletal muscle tissue (measured by Thr172 phosphorylation on western blot), improved oral glucose tolerance test performance compared to vehicle-injected controls, and enhanced GLUT4 membrane translocation in isolated skeletal muscle preparations, providing a mechanistic link between MOTS-c administration, AMPK activation, and improved glucose utilization in murine muscle tissue.
NAD+ Restoration and Mitochondrial Biogenesis in Aged Murine Tissues
Das et al. (Cell, 2018) from the Sinclair laboratory documented that NMN (an NAD+ precursor) supplementation in aged C57BL/6 mice restored NAD+ levels in muscle to those of young animals, increased SIRT1 deacylase activity measured by histone H3K9 acetylation levels, upregulated PGC-1alpha and related mitochondrial biogenesis genes, and increased capillary density in skeletal muscle assessed by CD31 immunostaining, with treated aged mice showing improved exercise endurance compared to vehicle-treated aged controls.
Lifespan Extension and Metabolic Improvements by MOTS-c in Aged Mice
Bhattacharya and colleagues documented that chronic MOTS-c treatment in aged (12-month-old) C57BL/6 mice improved multiple metabolic parameters including body composition, insulin sensitivity, and physical performance compared to vehicle-treated aged controls, with MOTS-c-treated animals maintaining greater lean mass, lower fat mass, and better performance on rotarod and grip strength tests through 18 months of age in the study cohort.
Mitochondrial Membrane Potential in Aging Cell Models Treated with Epithalon
Khavinson and colleagues documented that Epithalon treatment in aged fibroblast cell cultures maintained mitochondrial membrane potential (measured by JC-1 fluorescence) and reduced reactive oxygen species levels (measured by DCFH-DA fluorescence) compared to age-matched untreated cell controls, with the findings attributed to the compound effects on cellular antioxidant gene expression and electron transport chain efficiency in aging in vitro cell systems.
Compounds Studied in This Area
Research compounds with documented preclinical activity in this domain.
Broader Research Context
Mitochondrial biology research has gained substantial momentum as a longevity and metabolic research domain since the identification of mitochondrial dysfunction as a recognized hallmark of aging by Lopez-Otin and colleagues (Cell, 2013) and the publication of the mitochondrial-derived peptide concept by Chang, Lee, and colleagues demonstrating that the mitochondrial genome encodes bioactive peptides with systemic metabolic effects. The convergence of NAD+ biology research (Sinclair, Guarente, Verdin groups), mitochondrial-derived peptide research (Chang lab), and aging hallmarks research has created a rich, multi-institutional research landscape for compounds targeting mitochondrial function and energy metabolism.
Research Questions
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