cjc-1295 is one of those subjects where the details matter more than the headlines. This page pulls together the background, the mechanisms, and the practical points readers ask about most.
Last reviewed on 2025-09-18. Where a claim depends on a specific study, the study is described rather than over-claimed.
CJC-1295 belongs to a class of synthetic peptides modeled on growth hormone releasing hormone, a forty-four amino acid signal produced by the hypothalamus. The compound is built from the first twenty-nine residues of the natural sequence, with four substitutions introduced at positions 2, 8, 15 and 27. These changes were designed to slow enzymatic breakdown while preserving receptor activation. The result is a peptide that is shorter than native GHRH and considerably more resistant to ordinary clearance pathways in circulation.
Two related forms appear under the CJC-1295 name. The simpler analogue, commonly written as modified GRF(1-29), carries the four substitutions but no additional conjugation. The second form attaches a maleimidopropionic acid linker to a lysine residue, a modification frequently called the drug affinity complex. That linker reacts with the free thiol on serum albumin to form a covalent bond. Because albumin has a long residence time in blood, the conjugated peptide stays in circulation far longer than the unconjugated analogue.
Stability depends heavily on physical state. A lyophilized powder kept dry, desiccated, and shielded from light typically holds its integrity for months to years at minus twenty degrees Celsius, and longer at minus eighty. Once dissolved, the peptide becomes far more vulnerable, since peptide bond hydrolysis, oxidation of susceptible residues, and aggregation all proceed faster in solution. Buffers near neutral pH are generally gentler than strongly acidic or alkaline conditions. Repeated freeze-thaw cycles and exposure to air-liquid interfaces during vigorous mixing cause losses that are easy to overlook.
Verification matters because research peptides vary widely in quality. A certificate of analysis is only as reliable as the method behind it, and a single chromatographic trace reveals little about counter-ions, residual solvents, or water content. Independent laboratories commonly pair mass confirmation with chromatographic purity and, where relevant, quantify water along with acetate or trifluoroacetate content. Reported purity figures are not standardized across suppliers, so a stated value such as ninety-eight percent is not directly comparable unless the analytical method, column, and detection wavelength accompany it.
| Property | Value | Notes |
|---|---|---|
| Peptide class | Synthetic GHRH analogue | Built on a 29 residue sequence |
| Primary target | GHRH receptor (GHRHR) | Class B G protein coupled receptor |
| Unconjugated half life | Minutes | Limited by protease degradation |
| Key modification | Four residue substitutions | Positions 2, 8, 15 and 27 |
| Common synonym | Modified GRF(1-29) | Usually denotes the form without DAC |
The second form adds a maleimide-bearing linker to the lysine at the carboxyl end. This group reacts with cysteine-34 on circulating serum albumin, forming a covalent bond that keeps the peptide in the bloodstream for far longer. ConjuChem developed the molecule as a way to extend the action of a peptide without frequent administration. The albumin attachment is the defining structural feature of the drug affinity complex version. Whether continuous exposure produces effects distinct from shorter pulses remains an unresolved research question.
CJC-1295 belongs to a family of synthetic peptides modeled on growth hormone-releasing hormone, the hypothalamic signal that prompts the pituitary to release growth hormone. The compound is built from the first twenty-nine amino acids of the natural human sequence, a fragment that retains full receptor binding capacity. Native growth hormone-releasing hormone is degraded quickly in circulation, so the fragment alone has limited practical value. Early work therefore focused on chemical modifications that preserve receptor binding while slowing enzymatic breakdown. The result is a molecule described in the literature as a long-acting analog of the natural hormone.
The compound emerged from work at a Canadian biotechnology firm in the early 2000s. Early human studies examined its effect on growth hormone and insulin-like growth factor 1 in healthy volunteers and in people with HIV-associated fat redistribution. Reports described sustained increases in both markers after a single injection. Development did not advance to regulatory approval, and the clinical programme was later discontinued. The molecule is now encountered mainly as a research chemical rather than a marketed medicine.
Two forms circulate in research settings and are frequently confused. One carries the drug affinity complex and is often written as CJC-1295 with DAC; the other lacks that group and is usually called modified GRF(1-29). The two share the same core sequence but differ sharply in how long they persist in blood. Products labelled only as CJC-1295 normally refer to the version carrying the complex. Documentation that omits the distinction leaves the intended molecule ambiguous.
Patient may feel itchy or having hives but the symptoms are usually mild and can be controlled by stopping the transfusion and giving antihistamines. Anaphylactic reactions are rare life-threatening allergic conditions caused by IgA anti-plasma protein antibodies. For patients who have selective immunoglobulin A deficiency, the reaction is presumed to be caused by IgA antibodies in the donor's plasma. The patient may present with symptoms of fever, wheezing, coughing, shortness of breath, and circulatory shock. Urgent treatment with epinephrine is needed. Post-transfusion purpura is an extremely rare complication that occurs after blood product transfusion and is associated with the presence of antibodies in the patient's blood directed against both the donor's and recipient's platelets HPA (human platelet antigen). Recipients who lack this protein develop sensitization to this protein from prior transfusions or previous pregnancies, can develop thrombocytopenia, bleeding into the skin, and can display purplish discolouration of skin which is known as purpura. Intravenous immunoglobulin (IVIG) is treatment of choice. Transfusion-related acute lung injury (TRALI) is a syndrome that is similar to acute respiratory distress syndrome (ARDS), which develops during or within 6 hours of transfusion of a plasma-containing blood product. Fever, hypotension, shortness of breath, and tachycardia often occurs in this type of reaction.
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(a) Maintain records that detail the nature and value of transactions, whether such transactions comprise a single transaction or a series of connected transactions, and where these transactions take place within a month. (b) Furnish information on transactions referred to in clause (a) to the Director within the time prescribed, including records of the identity of all its clients. Section 12 (2) prescribes that the records referred to in sub-section (1) as mentioned above, must be maintained for ten years after the transactions finished. It is handled by the Indian Income Tax Department. The provisions of the Act are frequently reviewed and various amendments have been passed from time to time. Most money laundering activities in India are through political parties, corporate companies and the share market. These are investigated by the Enforcement Directorate and Indian Income Tax Department. According to Government of India, out of the total tax arrears of ₹2,480 billion (US$26 billion) about ₹1,300 billion (US$13 billion) pertain to money laundering and securities scam cases. Bank accountants must record all transactions over Rs. 1 million and maintain such records for 10 years. Banks must also make cash transaction reports (CTRs) and suspicious transaction reports over Rs. 1 million within 7 days of initial suspicion. They must submit their reports to the Enforcement Directorate and Income Tax Department.
== Clinical significance == From 42 cases of non-small cell lung cancer patients, the expression level of Grx2 showed a significant correlation with the degree of differentiation in adenocarcinoma and a clear inverse correlation with proliferation. In tumor cells, cells with decreased Grx2 are dramatically sensitized to cell death induced by the anti-cancer drug, DOX. In cardiovascular disease, Grx2a overexpression protects mouse heart from Dox and ischemia-induced cardiac injury, potentially via increasing mitochondrial protein glutathionylation. Conversely, Grx2 knockout hearts developed left ventricular hypertrophy and fibrosis, leading to hypertension. The mechanistic study shows that Grx2 knockout decreased mitochondrial ATP production, possibly via increased glutathionylation and thereby inhibition of complex I.
The definition of whistleblowing in force under the "Sapin 2 Law" – which includes whistleblowing not based on work – has been maintained. The protection applies to any natural person who facilitates or assists whistleblowers – as required in the directive – but also to entities such as NGOs (Non-governmental organizations) or trade unions, which act as a facilitator. They are offered the same level of protection. Military personnel will now be afforded the same level of protection as other civil servants, so long as they do not disclose information that may harm national security. The law provides that whistleblowers may be granted financial assistance when subjected to a suit, by making an application to a judge, who has the power to force the suing organization – the employer, for instance – to cover their legal fees and, if their financial situation has deteriorated, their living expenses. The law provides that whistleblowers shall not incur criminal liability with respect to the acquisition of, or access to, the information that is reported or publicly disclosed. They cannot be sentenced for any offenses committed to gather proof or information as long as they obtained it lawfully. The law strengthens existing sanctions against those who retaliate against whistleblowers: The criminal sanctions applicable to persons retaliating against whistleblowers can go up to three years of imprisonment and a fine of €45,000. The judges may impose €60,000 fines on companies taking a SLAPP action against a whistleblower.
Sources: en.wikipedia.org
The names are often used interchangeably in casual writing, but they are not strictly identical. Modified GRF(1-29) refers to the unconjugated analogue carrying only the four substitutions. The version sold as CJC-1295 with DAC includes the albumin binding linker and clears much more slowly.
DAC stands for drug affinity complex, a term describing the maleimidopropionic acid linker. This group forms a covalent bond with the cysteine residue on serum albumin after administration. The resulting adduct is what extends the circulating half life from minutes to days.
No. It is entirely synthetic and does not correspond to any known endogenous peptide. The design starts from human growth hormone releasing hormone and introduces deliberate substitutions. Any biological effect comes from mimicking the natural hormone at its receptor.
Mass spectrometry establishes whether the observed molecular weight matches the calculated sequence mass. Chromatographic retention and fragment mapping add further confidence about sequence and composition. A single technique alone is rarely treated as sufficient evidence of identity.