At 1 nM, the cyclopeptide Mallotumide A reduced lipid accumulation and adipogenic-regulator expression in murine 3T3-L1 cells, without major apoptosis or mitochondrial impairment in mature adipocytes. Because this concentration is near the precursor-cell IC50, differentiation inhibition must be distinguished from cytostatic effects.
Key findings
- Precursor-cell IC50 was about 1 nM, while mature adipocytes retained near-100% viability across 0.001-1 nM. At 1 nM, lipid droplets, C/EBPα, PPARγ, pyruvate carboxylase, ACC1, FAS and Akt signalling declined, without major JNK/p38 or caspase activation; moderate mitochondrial spare capacity remained.
Why this matters globally
Natural compounds affecting adipogenesis can probe metabolic mechanisms and seed lead-discovery, but obesity development requires whole-organism efficacy and long-term safety.
Thai researcher contribution
Mahidol University, Silpakorn University and Rajabhat Rajanagarindra University linked natural-product chemistry with metabolic cell biology.
Limitations to consider
This is one murine cell line, not human tissue. The tested concentration approaches precursor cytotoxicity and may suppress proliferation. Absorption, metabolism, molecular target, animal efficacy and safety are unknown; it is not a weight-loss product.