PX1 Research provides laboratory-grade Tesamorelin Acetate engineered for high-precision in vitro and preclinical research applications. As a synthetic growth-hormone-releasing hormone (GHRH) analog, this compound is supplied exclusively to qualified academic, clinical, and industrial research institutions seeking standardized analytical materials.
PX1 Research provides laboratory-grade Tesamorelin Acetate engineered for high-precision in vitro and preclinical research applications. As a synthetic growth-hormone-releasing hormone (GHRH) analog, this compound is supplied exclusively to qualified academic, clinical, and industrial research institutions seeking standardized analytical materials.
To order Tesamorelin Acetate for laboratory research, investigators require certified reference materials with validated structural identity and minimal batch-to-batch variability. PX1 Research supplies USA-manufactured Tesamorelin Acetate at ≥98% purity, verified through reverse-phase high-performance liquid chromatography (RP-HPLC) and electrospray ionization mass spectrometry (ESI-MS). Each lot includes a comprehensive Certificate of Analysis (COA) detailing purity, mass confirmation, and quantitative endotoxin testing.
When procurement departments order Tesamorelin Acetate through PX1 Research, products are dispatched directly from climate-controlled facilities in California and Arizona. Fast domestic logistics minimize exposure to thermal fluctuations during transit, preserving sequence integrity for demanding assays investigating GHRH receptor signal transduction, somatotropic axis regulation, and intracellular signaling networks.
Tesamorelin Acetate (CAS 218949-48-5) is a stabilized synthetic derivative of human growth-hormone-releasing hormone (GHRH 1-44). The peptide structure comprises 44 amino acid residues modified at the N-terminus by the addition of a hexenoyl moiety (trans-3-hexenoic acid). This N-terminal hydrophobic modification enhances resistance to enzymatic degradation by dipeptidyl peptidase IV (DPP-IV), significantly extending its stability in aqueous buffers and biological matrices compared to native GHRH.
The molecular formula of the free base is C221H366N72O67S, featuring a molecular weight of approximately 5135.9 Da. In its salt form, acetate ions associate with basic side chains (lysine and arginine residues), stabilizing the tertiary structure for lyophilization. Investigators evaluating molecular conformation during ligand-receptor interaction studies rely on this chemical modification to probe stable binding kinetics without rapid proteolytic cleavage.
Preclinical studies indicate that Tesamorelin Acetate operates as a selective agonist at the growth-hormone-releasing hormone receptor (GHRHR), a G-protein-coupled receptor located primarily on somatotrope cells in the anterior pituitary gland. Upon binding, the peptide activates the Gs alpha subunit, stimulating transmembrane adenylyl cyclase to convert adenosine triphosphate (ATP) into cyclic adenosine monophosphate (cAMP).
Elevated intracellular cAMP activates protein kinase A (PKA), which phosphorylates specific transcription factors such as CREB (cAMP response element-binding protein). This cascade drives the transcription of growth hormone (GH) genes and triggers exocytosis of stored GH granules. Downstream of GH release, hepatocytes and peripheral tissues synthesize and secrete insulin-like growth factor 1 (IGF-1). In vitro models demonstrate that Tesamorelin preserves the natural pulsatile profile of GH release, avoiding receptor desensitization observed with continuous non-physiological secretagogue exposure. Researchers can explore these pathways further in our comprehensive GHRH analogs overview.
In animal models and cell culture systems, Tesamorelin Acetate is widely studied as a GHRH analog for elevating endogenous GH/IGF-1 axis activity to evaluate downstream metabolic regulation and tissue-repair mechanisms. Preclinical data show that GH signal activation modulates lipid metabolism by stimulating hormone-sensitive lipase (HSL) in adipocytes, promoting lipolysis and decreasing triglyceride storage within visceral adipose depots.
In rodent models of hepatic steatosis, administration of GHRH analogs demonstrates a reduction in intrahepatic lipid accumulation by enhancing mitochondrial beta-oxidation pathways and reducing de novo lipogenesis enzymes. Furthermore, in vitro studies utilizing skeletal muscle and fibroblast lines suggest that elevated local IGF-1 concentrations accelerate protein synthesis, extracellular matrix deposition, and cellular migration, providing a robust model for investigating musculoskeletal tissue repair dynamics. Explore our complete range of signaling ligands in the PX1 product catalog.
When designing somatotropic research protocols, investigators frequently compare Tesamorelin Acetate to other GHRH derivatives and growth hormone secretagogue receptor (GHSR) agonists. Understanding structural differences and receptor affinities is essential for selecting appropriate experimental controls:
Unlike short-chain analogs such as Sermorelin (GHRH 1-29), Tesamorelin features the full 44-amino-acid sequence with an N-terminal trans-3-hexenoic acid modification, granting higher stability against DPP-IV cleavage. While CJC-1295 No DAC also targets the GHRHR, Tesamorelin exhibits distinct binding kinetics and receptor dissociation rates in anterior pituitary cell cultures. Conversely, ghrelin mimetics like Ipamorelin act via the GHSR-1a pathway rather than GHRHR; combining these distinct ligand classes in dual-stimulation assays allows researchers to probe synergistic intracellular cAMP and calcium signaling pathways.
Proper reconstitution of Tesamorelin Acetate is critical to maintain peptide solubility and prevent aggregation or physical denaturation. Lyophilized cakes should be allowed to equilibrate to room temperature inside a desiccator before opening the vial to prevent ambient moisture condensation.
For sterile cell culture or assay preparations, reconstitute the lyophilized powder using laboratory-grade Bacteriostatic Water (0.9% benzyl alcohol) or sterile 0.9% Sodium Chloride injection solution. Gently direct the diluent down the glass wall of the vial rather than forcing liquid directly onto the lyophilized pellet. Allow the peptide to dissolve passively through gentle swirling; do not vortex or subject to ultrasonic agitation, as mechanical shear stress can disrupt secondary peptide structures. Reconstitution in phosphate-buffered saline (PBS) at pH 7.4 is suitable for immediate short-term assays, but long-term storage in neutral pH buffers without preservatives may foster aggregation.
Lyophilized Tesamorelin Acetate remains stable for up to 24 months when stored at -20°C to -80°C in a dry environment shielded from light exposure. Avoid repeated temperature fluctuations by storing vials in non-frost-free freezers, which periodically cycle thermal energy and degrade peptide bonds.
Once reconstituted into aqueous solution, Tesamorelin Acetate should be stored at 2°C to 8°C and utilized within 14 to 28 days depending on the choice of bacteriostatic agent. If working solutions must be maintained over extended experimental timelines, prepare single-use aliquots in polypropylene microcentrifuge tubes and freeze immediately at -80°C. Repeated freeze-thaw cycles must be strictly avoided, as thermal cycling causes molecular fragmentation and concentration loss due to non-specific tube wall binding.
The scientific integrity of laboratory research depends directly on reagent quality. PX1 Research enforces rigorous quality assurance protocols to guarantee that every lot of Tesamorelin Acetate meets demanding analytical criteria prior to distribution.
Purity is quantitatively determined using High-Performance Liquid Chromatography (HPLC) with UV detection at 214 nm, ensuring a minimum purity profile of 98%. Mass identity is confirmed via Electrospray Ionization Mass Spectrometry (ESI-MS) to verify molecular weight against theoretical values without sequence deletion errors. Furthermore, every batch undergoes Limulus Amebocyte Lysate (LAL) testing to confirm endotoxin concentrations remain below 0.01 EU/mg, protecting cell culture models from inflammatory contamination. All analytical testing is performed by ISO 17025 accredited third-party laboratories, with batch-specific COAs publicly accessible via our research portal.
PX1 Research supports university laboratories, biotechnology enterprises, and contract research organizations (CROs) requiring reliable volume sourcing. Academic and industrial procurement officers can establish institutional accounts to access bulk quantities, batch reservation, and custom vial configurations.
Orders placed for institutional accounts are fulfilled under strict chain-of-custody protocols from our facilities in California and Arizona. Standardized shipping options include temperature-monitored cold chain packaging to maintain physical integrity during warm summer months. Learn more about scale pricing and institutional supply agreements on our wholesale accounts page.
What is the primary mechanism of Tesamorelin Acetate in laboratory models?
Tesamorelin Acetate functions as a selective GHRH receptor agonist on pituitary somatotrope cells, stimulating adenylyl cyclase and cAMP signaling to promote pulsatile endogenous GH release and subsequent hepatic IGF-1 expression.
How does Tesamorelin Acetate differ structurally from native GHRH?
Tesamorelin incorporates a trans-3-hexenoic acid group attached to the N-terminus of GHRH(1-44). This structural modification increases resistance to enzymatic degradation by DPP-IV, extending biological half-life in assay media.
What purity levels are provided when I order Tesamorelin Acetate from PX1 Research?
PX1 Research supplies Tesamorelin Acetate at ≥98% purity as verified by reverse-phase HPLC and ESI-MS analytical testing.
Are batch-specific Certificates of Analysis available?
Yes. Every single lot of Tesamorelin Acetate sold by PX1 Research includes a downloadable COA featuring HPLC chromatograms, mass spectrometry reports, and LAL endotoxin assay results.
What liquid medium is recommended for reconstituting Tesamorelin Acetate?
For standard in vitro or animal research setups, reconstituted vials using sterile 0.9% Sodium Chloride or Bacteriostatic Water (0.9% benzyl alcohol) are recommended based on protocol design and storage timelines.
How should reconstituted Tesamorelin Acetate solutions be stored?
Reconstituted solutions should be stored at 2°C to 8°C for short-term use (up to 28 days with preservative). For extended storage, divide into single-use aliquots and preserve at -80°C to prevent freeze-thaw degradation.
What are the verified endotoxin thresholds for PX1 Research peptides?
All research peptides, including Tesamorelin Acetate, are batch-tested to confirm endotoxin levels below 0.01 EU/mg, preventing lipopolysaccharide (LPS) interference in sensitive cellular assays.
Can Tesamorelin Acetate be ordered in bulk for long-term screening projects?
Yes. Qualified institutional researchers and laboratories can order bulk quantities directly through our institutional purchasing program with customized lot reservation options.
All products are sold strictly for laboratory and research use only. Not for human or veterinary use, diagnosis, treatment or consumption. Statements have not been evaluated by the FDA.