Q-Der: a next-generation CoQ10 analogue supercharging neuroprotection by combating oxidative stress and enhancing...

Mitochondrial dysfunction and oxidative stress are central mechanisms in the progression of neurodegenerative diseases. This study first evaluated the toxicity of Q-Der (Q10-diacetate), a derivative of Coenzyme Q10, in HT22 hippocampal neurons under normal and oxidative stress conditions.

HT22 cells were treated with Q-Der at 2.5, 5 and 10 µM with and without rotenone. Mitochondrial superoxide production (Mitosox), gene expression (via qRT-PCR), and protein levels (via Western blot) were measured. Morphological analyses were performed using transmission (TEM) and scanning (SEM) electron microscopes.

Q-Der significantly reduced mitochondrial superoxide levels, particularly at 5 μM, and upregulated key mitochondrial biogenesis genes, including PGC-1α and TFAM. Additionally, it restored the expression of MT-ND1 and MT-COI, which were downregulated by rotenone. Western blot results showed a significant recovery in CV-ATP5A (complex V) expression (p < 0.05), preserving mitochondrial ATP production. Morphological analyses further confirmed Q-Der's ability to maintain cellular and mitochondrial structure under stress conditions.

These findings suggest that Q-Der is non-toxic under normal conditions and protects against oxidative stress, supporting its potential as a therapeutic agent for neurodegenerative diseases.