Compound Profiles7 min read
Mitochondrial-Derived Peptides and the Retrograde Signal
A small class of peptides encoded in the mitochondrial genome appears to carry information from the organelle back to the nucleus.
Read entryStack 03
Longevity Protocol
Redox cofactor availability studied alongside mitochondrial energy signalling.
- Research domain
- Longevity
- Components
- 02
- Certification
- Per component
- Supply
- Never pre-mixed
Overview
What this grouping is
Cellular ageing research keeps returning to the same pair of variables: how much NAD+ is available to the enzymes that consume it, and how the cell reports its own energy state. This grouping places a cofactor and a signalling peptide side by side so that supply and signal can be examined together.
NAD+ is not a modulator — it is a substrate, consumed by sirtuins, PARPs and CD38. MOTS-c is a signal. Confusing the two is one of the more common errors in the literature, and studying them together makes the distinction unavoidable.
Purpose
To separate cofactor availability from energy-state signalling in models of cellular ageing and mitochondrial capacity.
Included peptides
02 independently certified vials
Each component carries its own batch number and its own certificate of analysis. A stack result is only traceable if every batch identifier is recorded.
Scientific summary
NAD+ functions as an obligate electron acceptor in catabolic oxidation and as the substrate consumed by NAD-dependent enzymes; the free pool available for oxidative phosphorylation is set by the balance between salvage-pathway synthesis and consumption by PARPs, sirtuins and CD38. MOTS-c, by contrast, is a signalling peptide encoded in the mitochondrial genome, characterised as activating AMPK through folate-cycle inhibition and AICAR accumulation. One is the currency; the other is the message about how much currency remains.
Ideal research use
- 01Cellular ageing and senescence model characterisation
- 02Sirtuin and PARP activity assays where cofactor pool is a variable
- 03Mitochondrial oxidative capacity studies
- 04Redox biochemistry method development
Protocol information
How the set is handled
A description of laboratory practice as the published record reports it. Nothing here is administration guidance, and none of it should be read as such.
- 01Handling priorityNAD+ is hygroscopic and light-sensitive and sets the handling standard for the group. Prepare it in subdued light, keep the vial closed until the moment of reconstitution, and return unused material to cold storage promptly.
- 02ReconstitutionNAD+ is freely soluble but pH-sensitive in solution; the diluent used should be recorded, because pH shifts alter the degradation rate of the oxidised form. MOTS-c reconstitutes conventionally.
- 03AliquotingBoth components suffer from repeated freeze-thaw cycles. Where a preparation will be drawn on more than once, aliquot at the point of reconstitution rather than returning the parent vial to the freezer.
- 04DocumentationRecord the assayed content for NAD+ specifically. Because it is consumed stoichiometrically rather than acting catalytically, content variance translates directly into experimental variance.
Storage
Every component is supplied lyophilised and is stored independently at −20 °C, protected from light and moisture. Components are not pre-mixed: each vial carries its own batch number and its own certificate of analysis, and each is reconstituted separately. Once in solution, hold at 2–8 °C and observe the interval stated on the batch certificate for that specific component — the shortest interval in the group governs the group.
Storage & handling guideResearch links
Further reading
Frequently asked
About this grouping
This catalogue is presented for informational purposes only. It is not an offer of sale, and it makes no medical or therapeutic claim.
Compounds in this grouping
Enquiries
Discuss the protocol.
Ask a specialist about the Longevity Protocol — component batches, current documentation, and what can be supplied to your territory.