Thymosin Alpha-1 Peptide

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The Master Immunomodulatory Peptide: An Introduction to Thymosin Alpha-1 🔬

For researchers focused on the frontiers of immunology, infectious disease, and cancer immunotherapy, Thymosin Alpha-1 (Tα1)—also known by its generic name Thymalfasin—stands as one of the most extensively studied and clinically validated peptide immunomodulators in modern biomedical research . This synthetic 28-amino acid peptide is chemically identical to the naturally occurring human thymosin alpha 1, a biologically active component originally isolated from "thymosin fraction 5," a crude extract derived from bovine thymus tissue .

Thymosin Alpha-1's significance in research stems from its multifaceted role as a biological response modifier that activates various cells in the immune system . It plays critical roles in T-cell maturation and differentiation, enhancing Th1 immune responses while maintaining an exceptional safety profile without the overstimulation of cytokine production commonly associated with agents such as interferon (IFN) and interleukin (IL)-2 .

A central mechanism of Tα1 involves its action as an agonist for Toll-like receptors (TLRs) , particularly TLR2 and TLR9, on antigen-presenting cells . This initiates a signaling cascade that drives a T-helper 1 (Th1) polarized immune response, characterized by the production of key cytokines such as interferon-gamma (IFN-γ) and interleukin-2 (IL-2) . The peptide has been approved by regulatory agencies in over 35 countries for the treatment of chronic hepatitis B (HBV) and hepatitis C (HCV) infections . Beyond its antiviral indications, recent 2023 reviews highlight its expanding applications in immuno-oncology, where it has demonstrated potential in augmenting the efficacy of immune checkpoint inhibitors (ICIs), reversing M2 polarization of tumor-associated macrophages, and reducing chemoradiation-induced lymphopenia .

What is Thymosin Alpha-1 Peptide?

Thymosin Alpha-1 is a synthetic 28-amino acid peptide with the sequence Ac-Ser-Asp-Ala-Ala-Val-Asp-Thr-Ser-Ser-Glu-Ile-Thr-Thr-Lys-Asp-Leu-Lys-Glu-Lys-Lys-Glu-Val-Val-Glu-Glu-Ala-Glu-Asn-OH . Its molecular formula is C₁₂₉H₂₁₅N₃₃O₅₅ with a molecular weight of approximately 3108.3 Da . It is identified by CAS numbers 69440-99-9 and 62304-98-7 . Synonyms include Thymalfasin, Zadaxin®, and Tα1 .

Its primary mechanisms of action, established through numerous peer-reviewed studies, include:

1. T-Cell Maturation and Differentiation: Tα1 promotes the differentiation and maturation of T lymphocytes, enhancing their functional activity and restoring immune function in conditions characterized by immunodeficiency .
2. Toll-like Receptor (TLR) Agonism: Tα1 acts as an agonist for TLR2 and TLR9 on antigen-presenting cells, initiating signaling cascades that drive a Th1-polarized immune response and the production of IFN-γ and IL-2 .
3. Modulation of Macrophage Polarization: Preclinical evidence demonstrates that Tα1 can reverse efferocytosis-induced M2 polarization of macrophages via activation of a TLR7/SHIP1 axis, enhancing anti-tumor immunity by turning "cold-tumors" to "hot-tumors" .
4. Enhancement of Vaccine Responses: Tα1 has been utilized as an enhancer of vaccine response in immune-compromised populations, improving the efficacy of immunization strategies .
5. Reduction of Chemoradiation-Induced Lymphopenia: Clinical studies have shown that Tα1 can significantly reduce chemoradiation-induced lymphopenia and pneumonia in patients with locally advanced, unresectable non-small cell lung cancer (NSCLC) .

🔬 Primary Research Focuses and Applications

The Thymosin Alpha-1 Peptide is at the forefront of multiple cutting-edge research areas, validated by numerous peer-reviewed studies including recent 2023 reviews :

• Immuno-Oncology and Cancer Immunotherapy Research: Tα1 is a premier tool for studying the enhancement of anti-tumor immunity. Research demonstrates its potential to augment the efficacy of immune checkpoint inhibitors (ICIs), reverse M2 polarization of tumor-associated macrophages, and improve overall survival (OS) in patients with surgically resectable NSCLC and liver cancers in the adjuvant setting . Preclinical evidence also indicates a protective role in reducing colitis caused by ICIs .

• Viral Hepatitis and Infectious Disease Research: Tα1 has been extensively studied for its antiviral effects in chronic hepatitis B (HBV) and hepatitis C (HCV) infections . Clinical trials have investigated its use in combination with interferons and nucleoside analogs . A phase 2 trial examined a PEGylated form of Tα1 (PEG-Tα1) in combination with adefovir for HBeAg-positive chronic hepatitis B .

• Vaccine Adjuvant and Immunocompromised Populations Research: Tα1 has been utilized as an enhancer of vaccine response in immune-compromised populations, including the elderly and those with suppressed immune systems . Its ability to boost Th1 responses makes it a valuable tool for studying strategies to improve vaccine efficacy.

• Sepsis and Severe Infection Research: Tα1 has been shown to restore immune functions and help reduce mortality in patients with severe sepsis, where sepsis-induced immunosuppression is a major driver of poor outcomes . It acts without overstimulating cytokine production, avoiding the side effects associated with other immunomodulators .

• Lung Cancer and Radiation-Induced Toxicity Research: Recent studies have demonstrated that Tα1 can significantly reduce chemoradiation-induced lymphopenia and pneumonia in patients with locally advanced, unresectable NSCLC, with a trending improvement in overall survival . This positions Tα1 as a potential tool for mitigating the immunosuppressive effects of cancer therapy.

🧪 Product Specifications & Technical Data

At Buy Peptides Online USA, we ensure your research is built on a foundation of quality and consistency. This peptide is manufactured to rigorous laboratory standards and verified through advanced analytical methods.

✅ Why Choose Buy Peptides Online USA for Your Research?

Sourcing reliable research compounds is critical for reproducible, high-impact science. Here is why discerning researchers across the USA trust us:

• Verified Purity & Potency: We provide access to Certificates of Analysis (COA) and rely on advanced analytical methods like High Performance Liquid Chromatography (HPLC) and Mass Spectrometry (MS) to confirm the identity and purity (≥99%) of every batch . This commitment ensures the integrity of your experimental data.
• Research-Focused Integrity: We strictly adhere to research-use-only (RUO) guidelines. Our product descriptions are factual, focusing on chemical properties and cited research applications, never unverified human-use claims. This product is not for diagnostic or therapeutic use .
• Fast & Discreet USA Shipping: As a USA-based supplier, we offer fast, reliable shipping across the United States with discreet packaging to ensure your order arrives safely, professionally, and on time for your critical research timelines. Enjoy free shipping on orders over $300.
• Expert Support & Authenticity Guarantee: Our team provides technical consultation to support your work. We stand behind the authenticity and quality of all our products, offering a product replacement service and clear complaint handling.

📝 Handling, Storage, & Important Safety Information

• Critical Storage Information: Upon receipt, store the lyophilized powder at -20°C (-4°F) or below, desiccated, protected from light and moisture. Although stable at room temperature for up to 3 weeks, long-term storage requires freezing below -18°C . Powder is stable for up to 3 years at -20°C .
• Handling for Research Use: This product is for laboratory use only by qualified professionals. Before opening, allow the vial to warm to room temperature and briefly centrifuge to concentrate material at the bottom. Reconstitute in sterile 18MΩ-cm H₂O at a concentration not less than 100 µg/ml . Gently invert to mix; do not vortex.
• Stability Considerations: Once reconstituted, store at 4°C for 2-7 days. For long-term storage, freeze below -18°C. Adding a carrier protein such as 0.1% HSA or BSA is recommended for extended stability . Avoid repeated freeze-thaw cycles at all costs, as this can degrade the peptide.
• Safety Considerations: Thymosin Alpha-1 has demonstrated an exceptional safety profile in decades of clinical use, with adverse experiences infrequent and mild . Nevertheless, always wear appropriate personal protective equipment (PPE), including lab coats, safety glasses, and nitrile gloves. Work in a laminar flow hood or well-ventilated area.
• Warning: This product is not for human or veterinary use. It is not a drug, food, or cosmetic. Not for human consumption or diagnostic use . For laboratory research only.

❓ Frequently Asked Questions (FAQs)

Q: What is the primary mechanism of action for Thymosin Alpha-1?

A: Thymosin Alpha-1 is a potent immunomodulator that promotes T-cell maturation and differentiation, enhances Th1 immune responses, and acts as an agonist for Toll-like receptors (TLRs), particularly TLR2 and TLR9 . It also modulates macrophage polarization and enhances the efficacy of immune checkpoint inhibitors .

Q: What is the structure of Thymosin Alpha-1?

A: Thymosin Alpha-1 is a synthetic 28-amino acid peptide with the sequence Ac-Ser-Asp-Ala-Ala-Val-Asp-Thr-Ser-Ser-Glu-Ile-Thr-Thr-Lys-Asp-Leu-Lys-Glu-Lys-Lys-Glu-Val-Val-Glu-Glu-Ala-Glu-Asn-OH . Its molecular weight is approximately 3108.3 Da .

Q: What are the key research applications for Thymosin Alpha-1?

A: Thymosin Alpha-1 is primarily used in research into immuno-oncology (enhancing immune checkpoint inhibitors, reversing M2 macrophage polarization) , viral hepatitis (HBV, HCV) , vaccine enhancement in immunocompromised populations , sepsis and severe infections , and reducing chemoradiation-induced lymphopenia .

Q: What are the most recent research findings on Thymosin Alpha-1 (2023)?

A: Recent 2023 reviews highlight Tα1's expanding applications in immuno-oncology, including:

1. Augmentation of Immune Checkpoint Inhibitors (ICIs): Tα1 may enhance the efficacy of ICI-based therapeutic strategies .
2. Reversal of M2 Macrophage Polarization: Tα1 reverses efferocytosis-induced M2 polarization via activation of a TLR7/SHIP1 axis, turning "cold-tumors" to "hot-tumors" .
3. Reduction of Chemoradiation-Induced Toxicity: Tα1 reduces lymphopenia and pneumonia in NSCLC patients .

Q: What is the difference between Thymosin Alpha-1 and Thymalin?

A: Thymosin Alpha-1 is a single, well-defined synthetic 28-amino acid peptide with a known sequence and specific immunomodulatory activity . Thymalin, by contrast, is a polypeptide complex isolated from calf thymus containing a mixture of short peptides, including the active dipeptides EW (Glu-Trp) and KE (Lys-Glu).

Q: How do you verify the purity and identity of Thymosin Alpha-1?

A: We ensure every batch is rigorously analyzed using High Performance Liquid Chromatography (HPLC) and Mass Spectrometry (MS) . HPLC confirms a purity level of ≥99% , while Mass Spectrometry verifies the precise molecular weight (~3108.3 Da) , ensuring the correct peptide structure and identity. Certificates of Analysis (COA) are available upon request .

Q: What are the critical storage conditions for Thymosin Alpha-1?

A: Store the lyophilized powder at -20°C (-4°F) or below, desiccated and protected from light and moisture . Once reconstituted, store at 4°C for 2-7 days. For longer storage, freeze below -18°C, preferably with a carrier protein (0.1% HSA or BSA) . Avoid repeated freeze-thaw cycles.

Q: Is Thymosin Alpha-1 prohibited in sports research?

A: Researchers should be aware that Thymosin Alpha-1, as a peptide hormone and immunomodulator, would be considered a prohibited substance under the general category of peptide hormones and growth factors on the World Anti-Doping Agency (WADA) Prohibited List. It is intended for legitimate scientific research only.

Ready to Advance Your Research? 🚀

Equip your laboratory with a clinically validated, 28-amino acid immunomodulatory peptide for studying T-cell biology, cancer immunotherapy, viral infections, and vaccine enhancement. Order the high-purity Thymosin Alpha-1 (Thymalfasin) Peptide today from Buy Peptides Online USA. Benefit from our fast USA shipping, secure payments (including crypto), and the confidence that comes from rigorously tested, research-grade compounds validated by the latest 2023 discoveries . For any questions about this product or your order, our support team is here to provide technical consultation.