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 2025-11-09. Where a claim depends on a specific study, the study is described rather than over-claimed.
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.
CJC-1295 is a synthetic peptide built as a long-acting analogue of growth hormone-releasing hormone. Its backbone matches the first twenty-nine residues of the natural human hormone, with four amino acid substitutions added to slow enzymatic breakdown. A reactive maleimide group, commonly termed the drug affinity complex, allows the peptide to attach to circulating albumin after administration. That albumin attachment keeps the molecule in the bloodstream for an extended period instead of being cleared within minutes.
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.
Four amino acid substitutions separate the modified backbone from the parent GRF(1-29) sequence. These changes reduce recognition by dipeptidyl peptidase IV and related proteases, extending the interval before degradation. Development work in this area sought longer-acting GHRH analogs for endocrine investigation. Published descriptions treat the substitution set as a defining property of the core sequence, while the albumin-binding linker is described separately as an optional addition to that same backbone.
CJC-1295 is a synthetic peptide analog of growth hormone-releasing hormone, constructed on the 29-amino-acid fragment designated GRF(1-29). The name began as an internal development code during the 1990s and later spread through research supply catalogs and discussion forums. The molecule does not occur in nature; its sequence is engineered rather than isolated from tissue. Two related compounds are sold under this single label, and they differ by one appended chemical group that strongly influences how long the peptide remains in circulation.
| Property | Value | Notes |
|---|---|---|
| Molecular formula | C152H252N44O42 | Cited for the form without the drug affinity complex |
| Molecular weight | About 3368 Da | Reported value for modified GRF(1-29) |
| Appearance | White to off-white powder | Lyophilised solid as usually supplied |
| Solubility | Soluble in water and polar solvents | Clarity depends on purity and salt content |
| Typical storage | -20 C or below, dry | Protect from light and repeated warming cycles |
Batch-to-batch consistency depends on solid-phase peptide synthesis and subsequent purification. Coupling efficiency, resin choice, and cleavage conditions all affect the final profile. Counter-ion content and moisture can shift the apparent mass of a batch. Documentation typically includes a certificate of analysis with chromatograms and spectra. Independent verification by a second laboratory is sometimes requested. Whether a given certificate reflects the actual vial contents depends on chain of custody. Analytical methods themselves carry uncertainty that should be stated alongside results.
Lyophilized material is typically stored at minus twenty degrees Celsius or lower. Keeping the vial dry and protected from light preserves peptide integrity. Repeated freeze-thaw cycles can cause aggregation or loss of activity. Once dissolved, solutions are generally kept at two to eight degrees Celsius. Stability data for reconstituted solutions vary, and long-term behavior is not fully established. Working aliquots reduce the number of times a stock container is opened.
Reverse-phase high-performance liquid chromatography is the standard tool for purity assessment. The technique separates the target peptide from truncated or modified byproducts. Mass spectrometry confirms molecular weight and supports sequence verification. Electrospray ionization and matrix-assisted laser desorption are both used. Amino acid analysis provides an independent check on composition. Purity values are commonly reported as area percentage from the chromatogram. Residual trifluoroacetate and water content are also measured in many quality programs.
Laboratory handling centers on minimizing exposure to water, heat and oxygen before use. Working solutions are typically prepared in sterile water or a mild buffer, and any residual particulate matter is removed by filtration. When the powder dissolves slowly, a small proportion of acetonitrile or dilute acetic acid is sometimes added as a co-solvent. Containers are kept sealed and desiccated between uses. Records of lot number, reconstitution date and storage conditions support later comparison of results across experiments.
Identity and purity are established with reversed phase high performance liquid chromatography coupled to mass spectrometry. The chromatographic step separates the target peptide from truncated sequences and deletion products, while the mass measurement confirms the expected molecular weight to within a fraction of a dalton. Because the two common variants differ by the presence of the linker, mass alone can distinguish them in the unconjugated state. Amino acid analysis and peptide mapping are used when sequence level confirmation is required.
Lyophilized material is generally stable for extended periods when held at minus twenty degrees Celsius or below and protected from moisture and light. In solution the peptide is more labile; bond hydrolysis, aggregation and oxidation of susceptible residues all proceed faster at ambient temperature. Repeated freeze and thaw cycles should be avoided because they promote clumping and loss of soluble material. The conjugated variant adds a further consideration, since the maleimide group can hydrolyze in aqueous buffer and lose its ability to react with albumin.
To allow bone mineralization to take place, osteoblasts secrete tissue-nonspecific alkaline phosphatase into the osteoid to break down pyrophosphate, an extracellular inhibitor of hydroxyapatite precipitation which otherwise prevents precipitation of hydroxyapetite crystals from extracellular fluid which is supersaturated in Ca2+ and PO3−4 ions.
=== Pharmacokinetics === Remifentanil is considered a metabolic soft drug, one that is rapidly metabolized to an inactive form. Unlike other synthetic opioids which are hepatically metabolized, remifentanil has an ester linkage which undergoes rapid hydrolysis by non-specific tissue and plasma esterases. This means that accumulation does not occur with remifentanil and its context-sensitive half-life remains at 4 minutes after a 4-hour infusion. Remifentanil is metabolized to remifentanil acid, which has 1/4600th the potency of the parent compound. Due to its quick metabolism and short effects, remifentanil has opened up new possibilities in anesthesia. When remifentanil is used together with a hypnotic (i.e. one that produces sleep) it can be used in relative high doses. This is because remifentanil is rapidly eliminated from the blood plasma on termination of the remifentanil infusion; hence the effects of the drug quickly dissipate even after very long infusions. Owing to synergism between remifentanil and hypnotic drugs (such as propofol) the dose of the hypnotic can be substantially reduced. This leads often to more hemodynamic stability during surgery and a quicker post-operative recovery time.
== Mechanism of action == Imipenem/cilastatin has the ability to kill a wide variety of bacteria. Imipenem is the active antibiotic agent and works by interfering with their ability to form cell walls, so the bacteria break up and die. Imipenem is rapidly degraded by the renal enzyme dehydropeptidase if administered alone (making it less effective); the metabolites can cause kidney damage. Imipenem is a broad-spectrum betalactam antibiotic used for severe bacterial infections caused by susceptible organisms. Because imipenem is rapidly inactivated by renal dehydropeptidase I, it is given in combination with cilastatin, a DHP-I inhibitor which increases half-life and tissue penetration of imipenem. Imipenem/cilastatin, like other carbapenems, binds to bacterial penicillin-binding proteins and interferes with bacterial cell wall integrity and synthesis. It has activity against many aerobic and anaerobic Gram-positive and Gram-negative organisms, including Staphylococcus aureus, Streptococcus pyogenes, S. agalactiae, S. viridans- group streptococci, Enterococcus faecalis, Pseudomonas aeruginosa, Escherichia coli, Proteus mirabilis, Bacteroides fragilis and Peptostreptococcus species. Imipenem/cilastatin was approved for use in the United States in 1985. Imipenem/cilastatin is indicated for the treatment of severe or complicated skin, tissue, joint, respiratory tract, intra-abdominal, urinary tract and urogenital infections, but not meningitis (as it does not pass through the blood brain barrier), endocarditis, and sepsis due to susceptible organisms.
In September 1939, the Nationalist government promulgated the New County System (县各级组织纲要) to promote local self-government and popular political participation. Liu implemented this system in Xikang in order to increase the province's self-reliance and to curb the influence of the tusi. Liu identified the training of an administrative cadre as one of the key priorities in building Xikang. To this end, training institutes were established at Kangding (1938) and Hanyuan (1939), training around 2,000 officials. Liu's rhetoric at the time was anti-corruption, stating that only through thoroughly cleansing the officialdom would the counties west of the Jinsha River (then under Tibetan rule) be recovered for Xikang. In June 1941, he established the Xikang Provincial Training Corps, which ran until December 1946 and trained around 4,500 students in all. Liu personally interviewed each applicant and graded their exam papers, ensuring that all new graduates would be loyal to him. This administrative cadre, personally loyal to Liu, was one of the factors that helped him resist central government encroachment.
==== Other optical imaging ==== For in vivo fluorescence-based optical imaging, dyes that emit near infrared (NIR) wavelengths >700 nm are most effective, such as indocyanine green, but encounter limitations with reduced circulation time and nonspecific interactions with other biological factors that affect the fluorescence. pH-sensitive nanogels with functionalized surface receptors to target cancer cells were loaded with a fluorescent dye that was only released upon endocytosis. These nanogels successfully generated a fluorescent signal from within the cancer cells and many other groups have developed similar technologies.
Sources: en.wikipedia.org
It's this relationship and bond that I never wanted to break and I'm really proud that I haven't because it has been difficult at times." She has said that she hopes to "be making baking videos until I'm 90 years old." In 2021, she said in a Forbes interview "that around 60 hours of work go into a typical cooking video," due to the amount of time needed to experiment, assemble, bake, and film.
22 September It is reported that eight-year-old Aditi Shankar has become the first child in the UK to receive a kidney transplant that will not require her to take medication to prevent the organ being rejected, and that she is healthy and has returned to school. In his first statement since further allegations were made against him, Russell Brand posts a video on social media describing his week as "extraordinary and distressing". 23 September The government's home energy efficiency taskforce is scrapped. Members of the anti-monarchist pressure group Republic stage what they describe as the "first-ever" protest inside Buckingham Palace. 24 September – Home Secretary Suella Braverman orders a review into armed policing, after 300 firearms officers hand in their weapons, following concerns over a police officer charged with murdering 24-year-old Chris Kaba. Most of the officers return to their duties the following day. 25 September A hearing at Manchester Crown Court determines that Lucy Letby will face a retrial for one of the six counts of attempted murder that the jury at her original trial was unable to reach a verdict on; a provisional trial date is set for 10 June 2024. The Metropolitan Police are to investigate allegations of non-recent sexual offences following recent reports about comedian Russell Brand. 26 September Home Secretary Suella Braverman tells a US think tank the 1951 Refugees Convention is no longer fit for the modern age, and that being discriminated against for being gay or female should not be enough to qualify for refugee status.
=== Graphene === Layering graphene on top of gold has been shown to improve SPR sensor performance. Its high electrical conductivity increases the sensitivity of detection. The large surface area of graphene also facilitates the immobilization of biomolecules while its low refractive index minimizes its interference. Enhancing SPR sensitivity by incorporating graphene with other materials expands the potential of SPR sensors, making them practical in a broader range of applications. For instance, the enhanced sensitivity of graphene can be used in conjunction with a silver SPR sensor, providing a cost-effective alternative for measuring glucose levels in urine. Graphene has also been shown to improve the resistance of SPR sensors to high-temperature annealing up to 500 °C.
9 February – Donald Cameron, a Conservative list MSP for the Highlands and Islands, announces he is standing down from the Scottish Parliament to take up a seat in the House of Lords and a junior ministerial post in the Scottish Office. 10 February – Police Scotland are investigating 22 deaths that occurred at the Fullarton Care Home in Irvine, North Ayrshire during the COVID-19 pandemic. The home was one of the worst affected during the early days of the pandemic. 11 February – Canadian woman Claire Leveque, aged 24, dies following a disturbance in Sandness, Shetland. Aren Pearson is subsequently charged with her murder. 12 February – Actor and writer Simon Fanshawe is named the new Rector of the University of Edinburgh, succeeding Debora Kayembe. A man is arrested and charged over several acts of vandalism in Glasgow, including graffiti relating to the Gaza conflict daubed on the city's cenotaph. 13 February – Former NHS worker Tracy Menhinick, who gave a young boy "industrial amounts" of the laxative lactulose, is found guilty of poisoning the child following a 19-day trial at the High Court in Aberdeen. 14 February – Jordan Mitchell, who spoke about his desire to commit mass murder in Falkirk during a hospital visit, and who said he had killed animals, is given an Order for Lifelong Restriction by the Court of Criminal Appeal. 15 February – Glasgow City Council and North Lanarkshire Council vote to freeze council tax for the 2024–25 financial year.
=== Doping in sport === LGD-4033 is on the World Anti-Doping Association (WADA) list of prohibited drugs and has been found in drug testing samples of some athletes. Since at least June 2015, LGD-4033 has been available via the internet. In that month, German scientists proposed a new test to detect its metabolites present in human urine, and suggested an expansion of the WADA regime. LGD-4033 has been found in WADA samples and in racehorses as well.
Sources: en.wikipedia.org
=== Legal status === On 24 March 2022, the Committee for Medicinal Products for Human Use (CHMP) of the European Medicines Agency (EMA) adopted a positive opinion, recommending the granting of a marketing authorization for the medicinal product Camcevi, intended for the treatment of the cancer of the prostate in adult men when the cancer is "hormone-dependent", which means that it responds to treatments that reduce the levels of the hormone testosterone. The applicant for this medicinal product is Accord Healthcare S.L.U. Leuprorelin was approved for medical use in the European Union in May 2022.
== Pathology == When initially identified, camptocormia was classified as a psychogenic disease. Although the condition is sometimes a psychogenic manifestation, camptocormia typically originates from either muscular or neurological diseases. However, due to the wide variety of pathologies resulting in camptocormia, there is no singular cause that is most influential for the condition.
Education and health are provided mainly by member states, but shaped by common minimum standards in EU law. In the case of education, the European Social Charter, like the Universal Declaration, the International Bill of Human Rights, say that "everyone" has the right to education, and that primary, secondary and higher education should be made "free", for instance "by reducing or abolishing any fees or charges" and "granting financial assistance". While the history of education was confined to a wealth elite, today most member states have tuition free university. There are no common rules for university finance or governance, although there is a right to free movement and universities have voluntarily harmonised standards. In 1987, the Erasmus Programme was created to fund students to study in other countries, and with a budget of €30 billion from 2021 to 2027. From 1999, the Bologna Declaration and Process led to the creation of the European Higher Education Area where member state universities adopted a common degree structure (bachelor, master, and doctoral degree) with a goal to have similar expectations in learning outcomes. Member states may not impose different fees on students from other member states or limit their numbers, and this appears to have worked even without a system for countries to reimburse one another if costs differ widely. However, if member states have grants or student loans, R (Bidar) v London Borough of Ealing held there may be a minimum residency requirement, such as three years.
Striated muscle tissue is a muscle tissue that features repeating functional units called sarcomeres. Under the microscope, sarcomeres are visible along muscle fibers, giving a striated appearance to the tissue. The two types of striated muscle are skeletal muscle and cardiac muscle.
Trials are investigating whether botulinum toxin, when used to make a person appear to frown less, stops negative feedback from the face and affects depression. Psilocybin may have a beneficial role in the treatment of depression. A 2019 meta-analysis found that hypnotherapy may be an effective way of alleviating the symptoms of depression. No model of depression in animals that fully explains the mechanism of depression has been found as of 2019.
Sources: en.wikipedia.org
It is a synthetic peptide analogue of growth hormone-releasing hormone. Four substitutions in its sequence make it more resistant to enzymatic degradation than the natural hormone. In the version carrying a drug affinity complex, the peptide binds albumin and remains in circulation for days.
No regulatory agency has approved CJC-1295 for clinical use. Human trials were conducted in the 2000s, but the development programme was discontinued before any marketing application succeeded. Material sold today is offered as a research chemical, and its purity depends on the supplier.
Sermorelin is an unmodified fragment of growth hormone-releasing hormone and is cleared quickly. CJC-1295 contains substitutions that resist breakdown, and the form with a drug affinity complex persists much longer. Both act at the same receptor but differ substantially in duration of action.
No. It is a laboratory-synthesized analog built on a fragment of the natural hormone. The natural peptide is shorter-lived and lacks the stabilizing substitutions found in the synthetic version.