Background: Myristica fragrans (nutmeg) seed extract (NuSE) has been reported as a ligand for Peroxisome Proliferator-Activated Receptor (PPAR)-γ due to hypoglycemic and antidiabetic effects. The recent study also finds the role of PGC-1α as the regulator of mitochondrial biogenesis and the co-activator of PPAR-γ as well. Dopamine 1 receptor (D1DR) is generally distributed in the brain with a various function, such as cognitive function. As a preliminary study, we explore a possibility the current knowledge of the mechanism of NuSE enhance dopamine 1 receptor via neuronal mitochondrial biogenesis on infant rat brain tissue. Aim: This study was aimed to investigate whether PPAR- γ agonist from NuSE can induce expression brain PGC-1α and D1DR (D1A and D1B). Methods: Seven male rats (4 weeks) as a control and another seven male rats (4 weeks) was giving 8.1 mg NuSE /day by gavage within 12 weeks. End of the day, the rats were sacrificed, and the forebrain was extraction. Expression mRNA PGC 1-α and DIDR were analyzed. Results: The result showed significantly higher relatives expression of mRNA PGC-1α and mRNA D1DR in NuSE group (p<0.05). Conclusion: The findings provide preliminary support that PPAR-γ agonist from NuSE may offer a novel for the study brain mitochondrial biogenesis related mechanism of signaling dopamine receptor.
PPAR-γ agonist, PGC-1α, D1DR, brain mitochondrial biogenesis