How to Reconstitute CJC-1295 + GHRP-2 Blend: Laboratory Protocol Guide
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How to Reconstitute CJC-1295 + GHRP-2 Blend: Laboratory Protocol Guide
The CJC-1295 + GHRP-2 Blend (2mg/2mg per vial) is a pre-combined lyophilised research compound containing CJC-1295 No DAC (Modified GRF 1-29, GHRH-R agonist) and GHRP-2 (GHSR-1a agonist) co-lyophilised in a single 10mL sterile glass vial. This dual-peptide blend enables simultaneous GHRH-R and GHSR-1a receptor activation in a single reconstitution, supporting synergistic GH axis cell model research from one vial preparation.
Materials Required
- CJC-1295 + GHRP-2 Blend 2mg/2mg lyophilised vial
- Bacteriostatic water (BAC water) — 10mL vial
- 1mL sterile syringe with needle
- Alcohol swabs (70% isopropyl)
- Nitrile gloves
- Permanent marker for labelling
Pre-Reconstitution Preparation
Both peptides in this blend — CJC-1295 No DAC and GHRP-2 — are freely soluble in BAC water and have been co-lyophilised to produce a homogeneous blend. Allow the vial to equilibrate to room temperature for 10 minutes before reconstitution. The blend dissolves as readily as either individual peptide.
Step-by-Step Reconstitution Protocol
Step 1 — Prepare workspace. Wipe work surface with 70% isopropyl alcohol. Allow to dry. Wear nitrile gloves.
Step 2 — Swab both stoppers. Clean rubber stoppers on both vials with separate fresh alcohol swabs. Air dry 10 seconds each.
Step 3 — Draw 2mL of BAC water. Draw 2mL of bacteriostatic water into a sterile syringe.
Step 4 — Inject slowly along the vial wall. Direct the BAC water slowly down the inner glass wall over 15 seconds. Do not inject directly onto the blend powder.
Step 5 — Dissolve gently. Swirl gently for 20–30 seconds until fully dissolved. The solution should be clear and colourless. Do not shake or vortex.
Step 6 — Label. Record reconstitution date, concentrations of each component (1mg/mL each), and initials.
Resulting Concentration
Adding 2mL BAC water to a 2mg/2mg blend vial yields a stock concentration of 1mg/mL CJC-1295 No DAC + 1mg/mL GHRP-2 (1000mcg/mL each). For synergistic GHRH-R/GHSR-1a GH axis studies in GH3 pituitary cell model preparations, working concentrations of 1nM–100nM of each peptide are prepared by serial dilution into assay buffer.
Concentration Reference Table
| BAC Water Added | CJC-1295 No DAC | GHRP-2 |
|---|---|---|
| 1mL | 2.0mg/mL | 2.0mg/mL |
| 2mL | 1.0mg/mL | 1.0mg/mL |
Storage Conditions and Stability
Store lyophilised blend at −20°C prior to reconstitution, protected from light. Once reconstituted, store at 2–8°C for up to 28 days. Both peptides are stable under standard refrigeration. Do not freeze reconstituted solution. For long-term aliquots, store single-use tubes at −80°C.
Troubleshooting Common Reconstitution Issues
Powder not dissolving: Gently tilt and swirl to bring undissolved powder into contact with solvent. Do not heat. If incomplete after 60 seconds, inspect for moisture ingress or compromised seal.
Cloudy solution: Cloudiness may indicate aggregation or contamination. Discard if cloudiness persists after gentle swirling.
Foaming: Allow to settle naturally. Reduce injection speed on subsequent attempts and ensure stream is directed along the glass wall.
Loss of material: Swirl to contact all inner surfaces. Invert and draw from the stopper end for maximum recovery.
Research Application Notes
The pharmacological rationale for the CJC-1295 + GHRP-2 blend is the synergistic GH secretion that results from simultaneous GHRH-R (Gs/cAMP) and GHSR-1a (Gq/calcium) co-activation in pituitary somatotroph cell models — the two pathways converge to produce supramaximal GH secretion relative to either compound alone. When using this blend in cell model research, always run single-compound controls (CJC-1295 No DAC alone and GHRP-2 alone at matched concentrations) alongside the blend to quantify the synergistic contribution of dual receptor activation. CJC-1295 + GHRP-2 Blend 2mg/2mg vials are available from Pinnacle Peptides, verified at ≥99% purity by HPLC and mass spectrometry.
All content is intended for in vitro laboratory research purposes only. Not for human or animal consumption. Not intended to diagnose, treat, cure, or prevent any condition.
