Visao Geral NAD+ (Nicotinamide Adenine Dinucleotide) is a coenzyme present in every living cell, serving a dual function como um(a) electron transporter in redox reactions (glycolysis, TCA cycle → ATP production) e um(a) critical substrate for non-redox signaling enzymes incluindo sirtuins (SIRT1–7), PARPs, CD38/CD157, and SARM1.[1][2] Mammalian cells synthesize NAD+ through three primary pathways: De Novo Synthesis: From L-tryptophan via o(a) kynurenine pathway Preiss-Handler Pathway: From nico

What are the research applications of NAD+?

Aplicacoes de Pesquisa NAD+ research spans aging biology, metabolic disease, neurodegeneration, and cardiovascular health with 15+ ensaios clinicos and extensive predados clinicos: Aging and Longevity — Declining NAD+ is a hallmark of aging; supplementation mimics caloric restriction, rejuvenates celulas-tronco, extends healthspan in mice.[3][9] Metabolic Disorders — NMN was studied for muscle insulin-sensitivity endpoints in prediabetic women (Yoshino 2021, Science). NR preveniu diet-induziu ob

What does the research summary say about NAD+?

Resumo da Pesquisa Pre-clinica Key Preclinical Studies EstudoModeloPrincipais AchadosRef Mills et al. (2016)C57BL/6N mice — NMN 100–300 mg/kg/day oral × 12 moSuppressed weight gain ~10% (p[17] Das et al. (2018)Elderly C57BL/6 mice — NMN 500 mg/kg/day oral × 28dCapillary density restaurou to young-mouse levels; endurance melhorou 80% via SIRT1-dependent vascular rejuvenation[14] Hou et al. (2018)3xTgAD Alzheimer's mice — NMN 100 mg/kg × 28d–3moDecreased Aβ oligomers; restaurou spatial memory in w

How should NAD+ be stored?

Armazene NMN/NAD+ pó a −20°C; proteja da luz e da umidade. NAD+ em water estável a 4°C por 30 dias. NMN estável em drinking water 7–10 dias a RT.

NAD+: Mechanism of Action

$103.95 · COA do lote publicado · Água BAC grátis + frete grátis nos EUA · Despacho no mesmo dia antes das 14h ET · APENAS PARA USO EM PESQUISA

Comprar NAD+ 1000mg

26 Citacoes PubMedRevisado por EspecialistasUltima Revisao: fevereiro de 2026

Mecanismo de Acao

1. Sirtuin Activation (SIRT1–7)

Sirtuins are NAD+-dependent protein deacylases (class III histone deacetylases). They bind NAD+ e um(a) acetylated target protein, cleaving the glycosidic bond to release nicotinamide (NAM) and generate O-acetyl-ADP-ribose. Km range: 94–888 µM.[6]

SIRT1 Pathway: Deacetylates PGC-1α → biogenese mitocondrial; FOXO → stress resistance; also deacetylates LKB1 → ativa AMPK → positivo(a) feedback loop increasing NAD+ and fatty acid oxidation[6]
SIRT3 Pathway: Mitochondrial localization; deacetylates MnSOD → aprimorou antioxidante defense; ativa OXPHOS enzymes[6]

2. PARP1/2 DNA Repair

PARP1 detects DNA strand breaks → consumes NAD+ to build poly(ADP-ribose) chains → recruits repair enzymes (XRCC1). Km 20–97 µM — higher affinity do que sirtuins, can outcompete for NAD+ during DNA damage. Excessive ativacao → NAD+/ATP depletion → parthanatos (cell death).[6][7]

3. CD38/CD157 Hydrolysis

CD38 e o(a) major regulator of tissue NAD+ levels (Km ~15–25 µM). It hydrolyzes NAD+ into NAM and ADP-ribose, and cyclizes NAD+ into cADPR → Ca²⁺ mobilization from intracellular stores. CD38 expression aumenta with aging, directly driving NAD+ decline.[1][8]

4. SARM1 Axonal NADase

SARM1 contem a TIR domain with intrinsic NADase activity. Activated by nerve injury → rapido(a) axonal NAD+ depletion → local metabolic collapse and calcium influx → Wallerian degeneration.[7]

5. Extracellular Signaling

Extracellular NAD+ acts at P2X7 purinergic receptors on T-regulatory cells → ART2-P2X7 pathway → immune modulacao.[6]

Precursor Entry Mechanisms

Precursor	Cellular Entry	Notes
NAD+ (direct)	Cannot passively cross plasma membrane	Exception: Connexin 43 in heart muscle
NR	Equilibrative nucleoside transporters (ENTs)	Best oral biodisponibilidade; GRAS status
NMN	Dephosphorylated → NR by CD73 extracellularly	Slc12a8 transporter in pequeno(a) intestine
NAM	Passive diffusion	Feedback-inibe sirtuins/PARPs at alto(a) concentrations

Editorial Research Note

“Resumo da Pesquisa Pre-clinica Key Preclinical Studies EstudoModeloPrincipais AchadosRef Mills et al.”

Pure U.S. Peptides Research Standards TeamInternal editorial group summarising published peptide research for an audience of qualified independent investigators.

Referencias

Perguntas de Pesquisa Relacionadas

→ What Is NAD+?→ NAD+: Research Applications → NAD+: Safety Profile & Research Summary → NAD+: Chemical Properties → Storing NAD+: Best Practices

Related research

5-Amino-1MQ — Mechanism of action Epithalon — Mechanism of action FOXO4-DRI — Mechanism of action

Browse all research guides in the Peptide Research Library →

Deseja a revisao completa da pesquisa?

Comprar NAD+ 1000mg→

APENAS PARA USO EM PESQUISA

Este conteudo e fornecido apenas para fins educacionais e informativos. Os produtos sao fornecidos apenas para estudos in vitro e nao sao medicamentos, drogas ou suplementos. Nao aprovado pela FDA para prevenir, tratar ou curar qualquer condicao.