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Introduction
N-Acetyl-L-carnosine Powder is a naturally occurring, acetylated derivative of the dipeptide L-carnosine (composed of beta-alanine and L-histidine). Its defining feature is the addition of an acetyl group, a modification that grants it superior enzymatic stability compared to its parent compound[1]. Primarily recognized in biochemical research, Acetylcarnosine serves as a stable prodrug that gradually releases L-carnosine, a molecule renowned for its antioxidant, metal-chelating, and anti-glycation properties. This makes it a compound of significant interest for research into aging, oxidative stress-related conditions, and specific tissue health, particularly in ocular and neurological contexts[1].
Biochemical & Physical Parameters
| Parameter | Description / Specification | Source / Remarks |
|---|---|---|
| CAS No. | 56353-15-2 | |
| Density | ~1.343 g/cm³ | |
| Melting Point | 253 - 260ºC | - |
| Water Solubility | Highly soluble. | Implied from its biochemical use. |
| Storage | -20°C, dry, protected from light. | Recommended for long-term stability. |
| Key Feature | Resistant to carnosinase hydrolysis. | The acetyl group protects it from rapid breakdown. |
Mechanism of Action
The efficacy of N-Acetyl-L-carnosine stems from its dual role as a stable transporter and a precursor to the active L-carnosine, which exerts multiple protective effects:
Enhanced Stability and Targeted Delivery[1]:
N-Acetyl-L-carnosine's acetyl group acts as a protective shield, making it highly resistant to degradation by the enzyme carnosinase, which rapidly breaks down L-carnosine in plasma and many tissues.
This stability allows acetylcarnosine to persist longer in situ and function as a time-release reservoir. Once delivered to target tissues (e.g., the eye), it undergoes slow, sustained deacetylation to release the active L-carnosine. Its relative hydrophobicity compared to L-carnosine may also facilitate penetration through biological barriers like the cornea.
Multimodal Protective Activity of Released L-Carnosine:
The active L-carnosine released from Acetylcarnosine exerts several synergistic mechanisms:
Antioxidant & Reactive Species Scavenger: Directly quenches harmful reactive oxygen species (ROS) and free radicals, protecting cellular components like lipids, proteins, and DNA from oxidative damage[1].
Metal Ion Chelation: Binds to (chelates) pro-oxidative metal ions such as copper and iron, preventing them from catalyzing destructive free radical reactions (e.g., Fenton reaction).
Advanced Glycation End-product (AGE) Inhibitor: Acts as a competitive inhibitor of protein glycation and may even help reverse ("de-link") early-stage glycation products. The accumulation of AGEs is implicated in tissue aging and complications in conditions like diabetes.
Aldehyde Scavenger: Reacts with toxic aldehydes (e.g., 4-hydroxy-2-nonenal) produced during lipid peroxidation, neutralizing their damaging effects on proteins and other molecules[1].
Benefits & Research Implications
Based on scientific research, N-Acetyl-L-carnosine is associated with several potential bioactive benefits:
1. Ocular Health Support:
Extensive research focuses on its application in ophthalmic formulations (e.g., eye drops). Clinical studies suggest topical Acetylcarnosine may help improve visual acuity and glare sensitivity in age-related uncomplicated cataracts by counteracting oxidative stress and protein glycation in the lens. It is also studied for managing diabetic ocular complications.
2. Neuroprotective Potential:
Research indicates that carnosine and its derivatives, including Acetylcarnosine, can inhibit microglial oxidative stress and inflammation, and protect neuronal cells against excitotoxic and oxidative insults, suggesting a role in brain health research.
3. Skin Care Applications:
Studied for its antioxidant properties in dermatology. By scavenging free radicals and protecting against lipid peroxidation, it may help mitigate cutaneous aging processes induced by environmental stressors like UV radiation.
4. Systemic Antioxidant & Anti-glycation Activity:
As a precursor to L-carnosine, it contributes to a system-wide defense against oxidative stress and the formation of AGEs, processes linked to various age-related and metabolic conditions.
N-Acetyl-L-carnosine vs. L-Carnosine
| Feature | N-Acetyl-L-carnosine | L-Carnosine |
|---|---|---|
| Chemical Structure | L-Carnosine with an added acetyl group. | Dipeptide (beta-alanine + L-histidine). |
| Key Advantage | High resistance to carnosinase. | Directly bioactive. |
| Metabolic Fate | Stable prodrug: slowly releases L-carnosine over time in situ. | Rapidly hydrolyzed by carnosinase in blood and many tissues. |
| Primary Research Use | Delivery system for sustained L-carnosine activity, especially in topical (ocular) applications. | Study of direct, acute biochemical effects. |
| Antioxidant Capacity (in vitro) | May show different activity profiles. One comparative study noted Acetylcarnosine had weaker antioxidant activity in specific chemical assays. | Potent direct antioxidant and metal chelator. |
Applications in Research
N-Acetyl-L-carnosine Powder is a versatile tool for in vitro and preclinical research in several fields (For Research Use Only):
Ophthalmic Research
Primary Model Compound: For studying non-surgical interventions for cataracts and diabetic retinopathy.
Drug Delivery Studies: Used to develop and test novel ocular delivery systems (e.g., nanoparticle carriers, therapeutic contact lenses) for sustained carnosine release.
Neuroscience & Aging Research
Oxidative Stress Models: Used to investigate protection against oxidative damage in neuronal and microglial cell cultures.
Neuroinflammation Studies: Applied in models to study modulation of inflammatory pathways in the brain.
Dermatology & Cosmetic Science Research
Skin Aging Models: Studied for its effects on protecting skin cells and components (like collagen) from UV-induced and age-related oxidative damage.
Biochemical & Metabolic Studies
AGE Inhibition Assays: Used to research the inhibition of protein glycation and its pathological consequences.
Enzyme Stability Studies: Serves as a model compound to understand the impact of acetylation on peptide stability against enzymatic hydrolysis.
Frequently Asked Questions (FAQ)
Q: What is N-Acetyl-L-carnosine used for in eye drops?
A: In ophthalmic research and product development, it is used as the active ingredient in lubricant eye drop formulations. Its role is based on the hypothesis that, as a stable carnosine prodrug, it can deliver antioxidant and anti-glycation activity to the ocular surface and internal eye structures, potentially addressing factors associated with age-related lens changes.
Q: Is N-Acetyl-L-carnosine just a more stable form of L-carnosine?
A: Yes, that's its primary advantage. The acetyl group significantly slows its breakdown by the enzyme carnosinase, allowing it to reach target tissues and provide a sustained release of L-carnosine, whereas L-carnosine itself is rapidly metabolized in the bloodstream.
Q: Are there any known side effects or safety concerns?
A: In published clinical studies on ophthalmic use, N-Acetyl-L-carnosine eye drops have been reported as well-tolerated. However, as a research-grade chemical, it is not intended for direct human consumption or therapeutic use without proper pharmaceutical formulation and regulatory approval. Safety for any specific application must be determined through rigorous investigation.
Q: What is the recommended storage condition for the powder?
A: To maintain stability and purity, it should be stored desiccated at -20°C and protected from light.
Contact Us
Elevate your research with high-purity N-Acetyl-L-carnosine Powder (CAS 56353-15-2), a key compound for studying oxidative stress, aging, and targeted delivery systems.
Contact our technical sales team today to:
- Request a Certificate of Analysis (CoA) and detailed specifications.
- Discuss your specific research or manufacturing application needs.
- Inquire about pricing and availability for various quantities.
WhatsApp: +86-18066540910
E-mail: ella.zhang@huilinbio-tech.com.
References
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