Mitochondrial
MOTS-c vs NAD+: Research Comparison
MOTS-c and NAD+ are both studied in mitochondrial and energy-metabolism research, but they are different kinds of molecule. MOTS-c is a 16-amino-acid peptide encoded in mitochondrial DNA. NAD+ (nicotinamide adenine dinucleotide) is a coenzyme found in every cell.
Side-by-side comparison
| Attribute | MOTS-c | NAD+ |
|---|---|---|
| What it is | 16-amino-acid peptide encoded in mitochondrial DNA | Coenzyme found in every cell |
| Role | Linked to activation of AMPK, an energy-sensing enzyme, in cell and mouse studies | Carries electrons in energy metabolism; used up by enzymes such as sirtuins, PARPs and CD38 |
| Main models studied | Cells and mice | Cells, animals and human trials of precursors |
| Human data | Observational studies of natural MOTS-c levels | Human trials mostly test precursors such as nicotinamide riboside |
Detailed analysis
MOTS-c was described in 2015 (Lee et al., 2015). In cell and mouse studies it inhibits the folate cycle and the linked pathway that makes purines, which leads to activation of AMPK. Under metabolic stress it moves into the cell nucleus and changes the activity of many genes. In people, published studies so far are observational and measure natural MOTS-c levels.
NAD+ is a coenzyme that carries electrons in the reactions cells use to make energy. It is also used up by several enzymes, including sirtuins, PARPs and CD38, so cells must keep making it. Human research has mostly tested precursors that cells convert into NAD+. For example, a six-week randomised, placebo-controlled crossover trial of nicotinamide riboside in healthy middle-aged and older adults found it was well tolerated and raised NAD+ levels (Martens et al., 2018).
MOTS-c is a signalling peptide; NAD+ is a coenzyme used in many reactions. They are studied at different points of cell metabolism.
Key differences
- ·MOTS-c is a peptide signal; NAD+ is a coenzyme used in many cell reactions.
- ·MOTS-c is linked to AMPK activation in cell and mouse studies; NAD+ is used up by enzymes such as sirtuins and PARPs.
- ·Human trials in the NAD+ field mostly test precursors such as nicotinamide riboside.
- ·MOTS-c human data so far are observational.
Research summary
MOTS-c evidence is mostly cell and mouse work from the discovering group (Lee et al., 2015). NAD+ biology is well established; human trials have mostly tested precursors, such as nicotinamide riboside (Martens et al., 2018). Supplied for laboratory research use only.