A tesamorelin 2mg vial contains a high-purity, lyophilized synthetic peptide analog of growth hormone-releasing hormone (GHRH). Formulated specifically for laboratory research use, this 2mg unit allows investigators to analyze somatotroph receptor binding, pulsed growth hormone secretion, and downstream insulin-like growth factor 1 (IGF-1) transcription in cellular and animal models.
A tesamorelin 2mg vial contains a high-purity, lyophilized synthetic peptide analog of growth hormone-releasing hormone (GHRH). Formulated specifically for laboratory research use, this 2mg unit allows investigators to analyze somatotroph receptor binding, pulsed growth hormone secretion, and downstream insulin-like growth factor 1 (IGF-1) transcription in cellular and animal models.
Tesamorelin is a synthetic 44-amino-acid peptide derivative of endogenous growth hormone-releasing hormone (GHRH). By incorporating a trans-3-hexenoic acid group at its N-terminus, the molecule exhibits enhanced metabolic stability against rapid enzymatic degradation by dipeptidyl peptidase-IV (DPP-IV) compared to native GHRH(1-44). In experimental setups, a tesamorelin 2mg vial provides a precise quantity of lyophilized peptide designed for reconstitution in controlled laboratory settings.
Preclinical investigations focus extensively on how this structural modification alters signaling kinetics at the pituitary GHRH receptor. Researchers evaluating GHRH analogs utilize tesamorelin to explore somatotrophic axis modulation, lipid metabolism, and tissue regeneration mechanisms. PX1 Research supplies high-grade tesamorelin strictly intended for in vitro assays and animal model research.
At the cellular level, tesamorelin functions as a selective agonist at the growth hormone-releasing hormone receptor (GHRHR), a G-protein-coupled receptor predominantly expressed on anterior pituitary somatotrophs. Receptor engagement triggers the activation of adenylyl cyclase, prompting an intracellular rise in cyclic adenosine monophosphate (cAMP) and subsequent stimulation of protein kinase A (PKA). This signaling cascade activates voltage-gated calcium channels, prompting the exocytosis of pre-stored growth hormone (GH) granules.
In animal models, the resulting secretion of GH acts on hepatic tissue to stimulate the synthesis and secretion of insulin-like growth factor 1 (IGF-1). In vitro data indicate that tesamorelin maintains the physiological pulsatile release pattern of growth hormone, preventing receptor desensitization that can occur with continuous agonist exposure. Researchers tracking these pathways rely on our preclinical peptide research database to compare signaling kinetics across various growth hormone secretagogues.
In rodent and non-human primate studies, researchers utilize the tesamorelin 2mg vial to explore metabolic pathways, particularly visceral adiposity and hepatic lipid accumulation. GH signaling induces lipolysis in adipose tissue by upregulating hormone-sensitive lipase (HSL) and downregulating lipoprotein lipase (LPL). Experimental models demonstrate reductions in ectopic fat deposition without negative alterations in systemic glucose homeostasis when physiological pulsing is maintained.
Beyond lipid dynamics, elevated downstream IGF-1 expression drives research into tissue repair, protein synthesis, and neuromuscular maintenance. Preclinical models investigating tendon matrix remodeling, skeletal muscle hypertrophy, and peripheral nerve regeneration frequently incorporate GHRH agonists to quantify rates of cellular proliferation and extracellular matrix protein deposition.
To ensure reproducibility across experimental trials, researchers require strict analytical validation of every peptide lot. PX1 Research subjects every tesamorelin 2mg vial to comprehensive quality control testing performed by independent ISO 17025 accredited laboratories located within the United States.
Purity is quantitatively verified via Reverse-Phase High-Performance Liquid Chromatography (RP-HPLC), ensuring a purity threshold of greater than 98% or 99%. Molecular identity is confirmed through Electrospray Ionization Mass Spectrometry (ESI-MS), matching the theoretical molecular weight of 5135.9 Da. Furthermore, kinetic chromogenic LAL assays confirm that bacterial endotoxin levels remain strictly below <0.5 EU/mg, protecting cell cultures and animal models from confounding inflammatory artifacts.
When designing protocols to investigate the somatotropic axis, laboratories often compare tesamorelin against other GH-modulating compounds. While sermorelin represents the truncated 29-amino-acid active core of natural GHRH, its short terminal half-life requires structural modification or frequent assay dosing. In contrast, cjc-1295-no-dac offers altered receptor residence times, and ghrelin receptor agonists such as ipamorelin act via the growth hormone secretagogue receptor (GHSR-1a) pathway rather than the GHRHR.
Comparative preclinical studies indicate that tesamorelin exhibits higher potency and selectivity for visceral fat clearance models than truncated GHRH fragments, while avoiding the hypercortisolemia or prolactin spikes sometimes associated with non-selective secretagogues. Exploring PX1's complete catalog of research peptides allows investigators to select the precise peptide structure needed for target-specific receptor research.
Proper handling and reconstitution are essential to preserve the structural integrity of the lyophilized peptide cake inside the tesamorelin 2mg vial. All reconstitution procedures should be performed inside a certified laminar flow hood using aseptic techniques to prevent microbial contamination.
Investigators typically utilize target concentrations between 1 mg/mL and 2 mg/mL. To achieve a standard 1 mg/mL concentration, introduce 2.0 mL of sterile bacteriostatic water containing 0.9% benzyl alcohol. The diluent should be directed down the glass wall of the vial rather than sprayed directly onto the lyophilized powder. Gentle swirling or slow inversion should be applied until fully dissolved; mechanical vortexing or vigorous shaking must be avoided to prevent shear-stress-induced peptide denaturation.
Lyophilized tesamorelin 2mg vials remain stable at sub-zero temperatures. For long-term preservation prior to reconstitution, store the sealed vial at -20°C or -80°C protected from light. Under these conditions, the peptide maintains structural stability and activity for up to 24 months.
Once reconstituted into an aqueous solution, the peptide becomes more susceptible to hydrolytic cleavage and oxidation. Reconstituted liquid aliquots should be stored at 2°C to 8°C and utilized within 14 to 28 days depending on the preservative system present in the diluent. Repeated freeze-thaw cycles must be strictly avoided by dividing reconstituted solutions into single-use micro-aliquots prior to freezing at -80°C.
PX1 Research operates as a dedicated supplier for institutional, academic, and private research laboratories across North America. All peptides, including our growth hormone secretagogues, are synthesized in US-based GMP-compliant facilities adhering to rigorous quality management systems.
We maintain full lot traceability and provide downloadable, lot-specific Certificates of Analysis (COAs) directly on our platform. Orders are fulfilled rapidly with same-day shipping available Monday through Friday from centralized distribution centers in California and Arizona. For university laboratories and commercial institutions requiring bulk quantities, PX1 offers custom synthesis and bulk laboratory procurement programs.
What is a tesamorelin 2mg vial used for in laboratory research?
A tesamorelin 2mg vial is used in preclinical laboratory research to study GHRH receptor activation, somatotroph signaling, pulsatile growth hormone secretion, hepatic lipid metabolism, and downstream IGF-1 mediated tissue repair.
How is the purity of a tesamorelin 2mg vial verified?
Purity is verified using Reverse-Phase High-Performance Liquid Chromatography (RP-HPLC) to ensure a purity level exceeding 98%. Molecular weight and structural identity are confirmed via Electrospray Ionization Mass Spectrometry (ESI-MS).
What is the chemical structure and molecular weight of tesamorelin?
Tesamorelin is a modified 44-amino-acid peptide with a hexenoyl group attached to the N-terminal tyrosine residue. Its empirical molecular formula is C221H366N72O67S, with a calculated molecular mass of approximately 5135.9 Da.
How does tesamorelin differ from sermorelin or CJC-1295?
Tesamorelin is a full-length 44-amino-acid GHRH analog with a trans-3-hexenoic acid modification for extended enzymatic stability. Sermorelin consists of only the 1-29 sequence, while CJC-1295 includes distinct amino acid substitutions designed to extend plasma half-life.
What volume of bacteriostatic water is used to reconstitute a tesamorelin 2mg vial?
For standard laboratory concentration calculations, adding 1.0 mL of bacteriostatic water yields a 2 mg/mL concentration (2000 mcg/mL), whereas adding 2.0 mL yields a 1 mg/mL concentration (1000 mcg/mL).
What are the storage temperature parameters for lyophilized tesamorelin?
Unreconstituted, lyophilized tesamorelin vials should be stored at -20°C or -80°C in a desiccated environment protected from ultraviolet light for long-term stability.
How does tesamorelin stimulate growth hormone release in vitro?
Tesamorelin binds specifically to the GHRH receptor on pituitary somatotrophs, activating the Gs-alpha subunit, stimulating adenylyl cyclase, raising intracellular cAMP, and triggering calcium-dependent exocytosis of growth hormone.
What endotoxin threshold is maintained for PX1 tesamorelin research peptides?
PX1 Research verifies that every lot of tesamorelin contains endotoxin levels strictly below <0.5 EU/mg, verified through kinetic chromogenic LAL testing to protect cell cultures and animal models.
Can tesamorelin 2mg vials be purchased in bulk for institutional lab orders?
Yes, academic, corporate, and government research institutions can request custom quotes and bulk pricing through the PX1 Research wholesale program.
How quickly are tesamorelin orders shipped by PX1 Research?
Orders placed Monday through Friday before cut-off times ship same-day from centralized fulfillment centers located in California and Arizona.
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.