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NAD Disposable Self-injection Pen is a pre-filled device format for nicotinamide adenine dinucleotide, a coenzyme that behaves nothing like the peptides sold beside it.
– Pre-filled, so there is no reconstitution step and no bacteriostatic water to add
– 663 Da dinucleotide with no amide backbone and no disulfides to scramble
– Cells hold separate mitochondrial, cytosolic and nuclear NAD+ pools that do not freely equilibrate
– NAD+ photodegrades, so protect from light · purity per lot-specific COA
Research use only. Not for human or veterinary use, food, or household application.
Epic Peptides Lab · Research Use Only
Pre-filled coenzyme device · nicotinamide adenine dinucleotide
The NAD Disposable Self-injection Pen is a pre-filled device supplying nicotinamide adenine dinucleotide, CAS 53-84-9, molecular formula C21H27N7O14P2, molecular weight 663.43. Unlike most devices in this catalogue it contains a dinucleotide coenzyme rather than a peptide, and the handling assumptions differ accordingly.
| Property | Value |
|---|---|
| Compound | Nicotinamide adenine dinucleotide, oxidised form |
| Format | Pre-filled Disposable Self-injection Pen device |
| Physical state | Solution, supplied ready-filled |
| Compound category relative to catalogue | Coenzyme, not a peptide |
| Common designation | NAD+ |
| CAS number | 53-84-9 |
| Molecular formula | C21H27N7O14P2 |
| Molecular weight | 663.43 g/mol |
| Compound class | Dinucleotide coenzyme. Not a peptide |
| Structure | Nicotinamide mononucleotide joined to adenosine monophosphate through a pyrophosphate bridge |
| Redox partner | NADH, the reduced form |
| Principal enzyme classes consuming NAD+ | Sirtuins, PARPs, CD38, SARM1 |
| Principal biosynthetic routes | De novo from tryptophan, Preiss-Handler from nicotinic acid, salvage from nicotinamide |
| Rate-limiting salvage enzyme | NAMPT, nicotinamide phosphoribosyltransferase |
| Appearance | White to off-white lyophilized powder |
| Purity | Per lot-specific certificate of analysis |
| Solubility | Freely water soluble |
| Aqueous stability | Degrades in aqueous solution, faster at alkaline pH and at raised temperature |
| Storage, lyophilized | -20°C, protected from light and moisture |
| Storage, reconstituted | 2-8°C, protected from light, short hold only |
| Regulatory status | No approved human or veterinary injectable formulation |
Nearly every other device beside the NAD Disposable Self-injection Pen in this catalogue contains a peptide, and the assumptions that carry across from those formats do not all hold here.
A peptide is a chain of amino acids joined by amide bonds. NAD+ is two nucleotides joined through a pyrophosphate bridge, one bearing nicotinamide and the other adenine. Structurally the two compound classes have almost nothing in common.
Degradation routes differ accordingly. Peptides deamidate, oxidise at methionine and cysteine, aggregate, and hydrolyse at labile amide bonds. NAD+ hydrolyses at its glycosidic bond, undergoes addition at the nicotinamide ring under alkaline conditions, and is sensitive to light in ways most short peptides are not.
Analytical methods differ too. Peptide identity is confirmed by mass spectrometry against a calculated sequence mass. NAD+ is more conveniently confirmed by ultraviolet absorbance, since its chromophores give a characteristic spectrum that peptides lacking aromatic residues do not.
A researcher applying peptide-handling defaults to this compound will be broadly right about cold storage and broadly wrong about how long a solution lasts.
A point that whole-cell measurements obscure and that shapes how any NAD+ finding should be read.
The inner mitochondrial membrane is impermeable to NAD+ in mammalian cells. The mitochondrial pool is therefore maintained separately from the cytosolic pool, with its own synthesis through mitochondrial NMNAT3 and its own consumption.
The nuclear pool communicates with the cytosolic pool through nuclear pores, which pass molecules of this size, so those two are usually treated together. PARP activity in the nucleus can nonetheless draw down the shared pool substantially.
Compartment-specific measurement requires either fractionation with rigorous purity controls or genetically encoded sensors targeted to each compartment. Both are considerably more work than a whole-cell lysate assay, and both answer a question the lysate cannot.
The practical consequence is that a reported change in cellular NAD+ says little about where that change occurred, and interventions can move one pool while leaving another unchanged.
Light sensitivity receives less attention than it deserves for this compound, and the device format makes it easier to overlook.
The nicotinamide and adenine rings both absorb ultraviolet light strongly, which is what makes spectrophotometric quantification convenient. The same absorbance means the molecule takes up photon energy readily, and photodegradation follows.
Ambient laboratory lighting is a slower problem than direct sunlight or ultraviolet exposure, but for a solution-state product with an extended shelf life, slow processes accumulate.
Keeping the device in its original opaque or tinted packaging until immediately before use addresses it with no additional effort. Benches near windows are worth avoiding for any solution-state storage.
Where a solution has been left exposed, spectrophotometric checking will reveal degradation, since photodegradation products alter the absorbance profile rather than simply reducing its magnitude.
For a NAD Disposable Self-injection Pen, documentation substitutes for the analytical access a sealed format stops, and knowing what to ask for makes that substitution useful.
Measured concentration rather than nominal. A certificate stating the concentration determined analytically at manufacture carries information a label cannot.
Manufacture date, which for a solution-state coenzyme is the variable determining how much degradation has already occurred. A device manufactured recently and shipped cold is in a different condition from one that has been in inventory.
Purity by chromatography, which distinguishes intact coenzyme from degradation products and from nicotinamide, both of which may be present in a preparation that has been stored imperfectly.
Storage conditions during transit. For this compound a cold-chain record has real informational content rather than being a formality, and its absence is worth noting rather than assuming.
Matching format to experimental question saves more effort than optimising any single handling step, and the fit here is narrower than for the peptide devices.
The format suits work delivering a consistent quantity repeatedly over an extended schedule, where operator-to-operator pipetting variation would otherwise become a source of noise and where the specific concentration supplied happens to match the design.
It suits situations where handling steps are worth minimising, since material never contacts open air between manufacture and delivery, which removes both contamination and evaporative concentration as variables.
It does not suit concentration-ranging work of any kind. A fixed concentration in a sealed container cannot be titrated, and diluting from a device defeats the consistency advantage that justified choosing it.
It does not suit work where the coenzyme must be demonstrably intact at a known concentration, because the format denies the verification that would establish either. For a compound that degrades in solution, that limitation bears directly on data quality rather than only on convenience.
Nor does it suit cell-culture addition, where the permeability problem means added coenzyme largely does not reach the intracellular compartment regardless of how it was delivered.
Coenzyme delivered into any biological system encounters surface enzymes before it encounters anything intracellular, and for this molecule that encounter is consequential.
CD38 is the principal one, an ectoenzyme with its ecto-domain facing outward and substantial turnover capacity, and it hydrolyses the coenzyme extracellularly, and its expression varies widely between cell types and rises in several contexts.
CD73 and various nucleotide pyrophosphatases contribute additional extracellular processing, converting the coenzyme through intermediates toward nicotinamide riboside and nicotinamide.
Those products are membrane-permeant in ways the parent molecule is not, which creates the interpretive problem described elsewhere on this catalogue: an intracellular effect following extracellular addition may be an effect of the breakdown products.
Measuring the extracellular species over time, by mass spectrometry of the medium, distinguishes the possibilities directly. Comparing against direct addition of nicotinamide riboside at the concentrations generated is the complementary test.
Neither is elaborate, and either turns an ambiguous observation into an interpretable one.
Reporting practice for a solution-state coenzyme differs from reporting practice for a peptide, and the differences are small but consequential.
State the format explicitly. A reader needs to know that the material came from a pre-filled device rather than a reconstituted vial, because the two carry different solution histories and therefore different degradation expectations.
State the elapsed time between manufacture and use if it is known. Where a NAD Disposable Self-injection Pen has been in inventory for months, that fact belongs in the methods rather than being silently absorbed into the finding.
State whether concentration was verified independently or taken from the label, and both are legitimate choices and they support different levels of confidence.
Finally, state the storage history including any excursion. For this compound a warm afternoon on a bench is a data-affecting event, not a housekeeping detail.
A NAD Disposable Self-injection Pen wants cold, dark, undisturbed conditions, and used within a defined window from manufacture rather than from receipt.
Keep the device refrigerated continuously. Return it promptly after use rather than leaving it at ambient temperature between sessions, since the degradation processes described above run continuously rather than being triggered by any particular event.
Leave it in original packaging until immediately before use, which handles light exposure and protects the mechanism from physical damage.
Inspect each time. Clear, colourless to very pale solution, intact seal, no particulate. Discolouration is the most accessible degradation indicator for this compound and it should be treated as disqualifying rather than cosmetic.
Record lot, manufacture date, storage history including any temperature excursion, and dates of use. For a solution-state coenzyme, storage history is part of the experimental record.
A final consideration concerns comparability. Where a programme has previously used lyophilized coenzyme reconstituted in-house and switches to a device format, the two are not interchangeable without a bridging measurement.
The reason is solution age. Freshly reconstituted material and material that has been in solution since manufacture differ in their degraded fraction, and that difference maps directly onto effective concentration.
Running both side by side in one assay on one day, at matched nominal concentration, quantifies the gap. If the responses match, the formats can be treated as equivalent for that assay. If they diverge, the divergence is the answer.
References verified against the publisher record. They concern NAD+ biology, for which the evidence base is substantial and independent, rather than the device format.
What is the NAD Disposable Self-injection Pen?
A pre-filled device supplying nicotinamide adenine dinucleotide, CAS 53-84-9, molecular weight 663.43. Unlike most devices in this catalogue it contains a dinucleotide coenzyme rather than a peptide. For laboratory research use exclusively, and not for human or veterinary use.
Why does the peptide distinction matter?
Because handling assumptions do not transfer. A peptide is amino acids joined by amide bonds. NAD+ is two nucleotides joined through a pyrophosphate bridge. Structurally they have almost nothing in common, and their degradation routes differ accordingly.
How do the degradation routes differ?
Peptides deamidate, oxidise at methionine and cysteine, aggregate and hydrolyse at labile bonds. NAD+ hydrolyses at its glycosidic bond, undergoes addition at the nicotinamide ring under alkaline conditions, and is light-sensitive in ways most short peptides are not.
What are the separate cellular pools?
The mitochondrial pool is maintained separately, since the inner mitochondrial membrane is impermeable to NAD+ in mammalian cells and the compartment has its own synthesis through NMNAT3. Nuclear and cytosolic pools communicate through nuclear pores and are usually treated together.
Why does compartmentalisation complicate measurement?
Because a whole-cell lysate assay reports a total that says nothing about where a change occurred. An intervention can move one pool while leaving another unchanged, and only fractionation with purity controls or compartment-targeted sensors can distinguish them.
How light-sensitive is NAD+?
More than commonly assumed. The nicotinamide and adenine rings absorb ultraviolet strongly, which is what makes spectrophotometric quantification convenient and also means the molecule takes up photon energy readily. Photodegradation follows, slowly under ambient lighting.
How is photodegradation detected?
Spectrophotometrically. Photodegradation products alter the absorbance profile rather than simply reducing its magnitude, so a spectrum that has changed shape indicates degradation more informatively than a reduced reading at a single wavelength would.
What documentation should accompany a device?
Measured rather than nominal concentration, manufacture date, purity by chromatography distinguishing intact coenzyme from degradation products and nicotinamide, and storage conditions during transit. For this compound a cold-chain record has real informational content.
Why does manufacture date matter more than receipt date?
Because degradation begins at manufacture, not at delivery. A solution-state coenzyme that has been in inventory is in a different condition from one recently made and shipped cold, and the receipt date says nothing about the interval before it.
What visual check applies?
Clear, colourless to very pale solution with an intact seal and no particulate. Discolouration toward yellow or brown is the most accessible degradation indicator for this compound and should be treated as disqualifying rather than cosmetic.
NAD+ Disposable Self-injection Pen is sold exclusively for laboratory research use. It is not a drug, food, or cosmetic product, and it is not a dietary product of any kind. It is not approved by the FDA or any comparable authority for human or veterinary use, and the device format does not alter that status in any way. This product is not intended to diagnose, treat, cure, or prevent any disease. It must not be given to humans or animals. Purchase is restricted to qualified researchers and institutions operating within applicable laws. All handling is the responsibility of the purchasing laboratory.
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