CJC-1295 comes up often in conversation and rarely with the context attached. Here we lay out the basics in order, then work through the practical considerations.
Updated 2026-04-08. Numbers and descriptions here follow the published literature rather than marketing material.
The distinguishing feature of the DAC form is a maleimide-containing group that reacts with the free thiol of cysteine-34 on human serum albumin. This reaction forms a covalent bond without enzymatic assistance, and it takes place after the peptide enters the bloodstream. Because albumin is abundant and long-lived, the attached peptide is carried through circulation far longer than an unmodified fragment would survive. The chemistry is a deliberate pharmacokinetic strategy rather than a change to receptor activity.
Enzymatic protection is a separate mechanism from plasma protein binding. The four substitutions in the backbone reduce recognition by dipeptidyl peptidase IV, which normally cleaves the natural hormone within minutes. Without the reactive group, this resistance still yields only a short window of activity, generally reported in the range of tens of minutes. With it, reported half-lives in early human work extended to several days. The size of that gap is the main practical distinction between the two materials.
Both forms act at the pituitary receptor for growth hormone-releasing hormone and increase growth hormone output, which in turn raises insulin-like growth factor 1. A long-acting analog produces sustained rather than pulsatile stimulation, and the physiological consequences of that pattern are not fully settled. Published human data on the extended form remain limited, and much of what circulates in discussion traces to early company reports rather than independent replication. How sustained exposure affects normal feedback remains an open question.
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.
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.
| Property | Value | Notes |
|---|---|---|
| Duration with linker | Several days | Reported in early human work |
| Duration without linker | Tens of minutes | Short plasma residence |
| Albumin attachment site | Cysteine-34 | Covalent maleimide reaction |
| Primary receptor | Pituitary GHRH receptor | Stimulates growth hormone release |
| Downstream marker | Insulin-like growth factor 1 | Indirect measure of activity |
Receptor level activity follows the canonical GHRH pathway. The peptide binds the GHRH receptor, a class B G protein coupled receptor on somatotroph cells of the anterior pituitary. Binding raises intracellular cyclic AMP, which promotes calcium entry and the release of growth hormone into the bloodstream. Because the molecule acts at the same receptor as the endogenous hormone, its effect is superimposed on the natural pulsatile rhythm rather than replacing it. Whether sustained receptor occupation leads to desensitization is not fully settled.
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.
Naming in this area is inconsistent, and readers should treat product labels with care. In much of the literature and in vendor catalogs, the unqualified term refers to the albumin-binding version, while the version lacking the DAC group appears as modified GRF(1-29), mod GRF(1-29), or the same name with a without-DAC qualifier. Because one abbreviation has been applied to both materials, the only reliable way to identify a sample is to check the stated sequence and the presence of the linker.
CJC-1295 is the name used for a synthetic peptide modeled on growth hormone-releasing hormone, the hypothalamic signal that prompts the pituitary to release growth hormone. The compound was described by a Canadian drug discovery company in the mid-2000s as a long-acting research tool. Two closely related molecules share the name in practice: one carries a drug affinity complex, or DAC, group, and one does not. The distinction matters because the two behave differently in circulation.
To ensure highly anisotropic, yet predictable solidification behavior within the SSZ, dynamic freezing patterns are preferred. Using dynamic freezing, the velocity of the solidification front, and, therefore, the ice crystal size, can be controlled with a changing temperature gradient. The increasing thermal gradient counters the effect of the growing thermal buffer imposed by the growing ice front. It has been shown that a linearly decreasing temperature on one side of a freeze-cast will result in near-constant solidification velocity, yielding ice crystals with an almost constant thickness along the SSZ of an entire sample. However, as pointed out by Waschkies et al. even with constant solidification velocity, the thickness of the ice crystals does increase slightly over the course of freezing. In contrast to that, Flauder et al. demonstrated that an exponential change of the temperature at the cooling plate leads to a constant ice crystal thickness within the complete SSZ, which was attributed to a measurably constant ice-front velocity in a distinct study. This approach enables a prediction of the ice-front velocity from the thermal parameters of the suspension. Consequently, if the exact relationship between the pore diameter and ice-front velocity is known, an exact control over the pore diameter can be achieved.
Second Battle of Artois — In what was referred to as the Second Action of Givenchy, British and Canadian forces attacked northwest of La Bassée, France and captured the front line, but were pushed back by German grenades and a shortage of ammunition. An official inquiry led by Lord Mersey into the sinking of the RMS Lusitania began at Methodist Central Hall in Westminster, London. French airplanes raided Baden and Karlsruhe, Germany. Armenian genocide — A group of 20 activists with the Social Democrat Hunchakian Party were hanged in the Sultan Beyazıt Square of Constantinople. Among those executed were Armenian leaders Paramaz, Aram Achekbashian, and Kegham Vanigian. Other Armenian leaders who were executed that same day while en route to Severek, Turkey included Harutiun Jangülian, Rupen Zartarian, Sarkis Minassian, Khachatur Malumian, and Nazaret Daghavarian. Japanese Government Railways extended the Echigo Line in the Niigata Prefecture, Japan, with station Arahama serving the line. The Cornish Library opened in Winnipeg. It received damage from flooding in 1918 and was repaired. The sports club Magni Grenivík was established in Grenivík, Iceland. The village of Denmark, Wisconsin was established. Born: Thomas Huckle Weller, American virologist, recipient of the Nobel Prize in Physiology or Medicine for his research into poliomyelitis viruses; in Ann Arbor, Michigan, United States (d. 2008) Died: Konstantin Konstantinovich, 56, Russian noble, grandson of Nicholas I of Russia (b. 1862)
stop codon Also termination codon. A codon that signals the termination of protein synthesis during translation of a messenger RNA transcript. In the standard genetic code, three different stop codons are used to dissociate ribosomes from the growing amino acid chain, thereby ending translation: UAG (nicknamed "amber"), UAA ("ochre"), and UGA ("opal"). Contrast start codon.
This success was enough for him to take over the No. 1 ranking in late October. Before the end of the season, Zverev also represented Germany in the Junior Fed Cup, leading them to a fourth-place finish. His last tournament of the year was the Grade A Orange Bowl, where he was defeated by Stefan Kozlov in the semifinals. As the top-ranked junior at the end of the season, he was named the ITF Junior World Champion, becoming the youngest boys' champion since Donald Young in 2005. Zverev played just two tournaments in 2014, both in Australia in January. He won the singles events at both tournaments, the first of which came against Australian Omar Jasika at the Traralgon Junior International. At the Australian Open, he was able to defeat Kozlov, who was seeded second, to finish his junior career with a first major title. Junior Grand Slam results – Singles: Australian Open: W (2014) French Open: F (2013) Wimbledon: 3R (2013) US Open: SF (2013)
Sources: en.wikipedia.org
In 2023, his work highlighted that substituted beta oligoamides self-assemble into metallosupramolecular frameworks with varied structures, including thin films and three-dimensional networks, by coordinating with different transition metals and metalates.
=== Dietary challenges === Adhering to the GFD can negatively impact those with coeliac disease, requiring major changes for an individual and their family. The restrictive nature of the GFD can lead to no longer enjoying food and pressure to be constantly vigilant about diet. The social life of those with coeliac disease is also negatively affected by the GFD. Cross-contamination—gluten-free food coming into contact with gluten—is a common worry for those eating away from home. Eating out may cause anxiety as it requires disclosing dietary restrictions and risking potential cross-contamination. Receiving a diagnosis of coeliac disease and the dietary changes required to manage the disorder can affect a person's relationship with food and lead to disordered eating as well as anxiety and depression. A diagnosis of coeliac disease can carry stigma, which may affect individuals' ability to seek help or disclose their condition when needed. Accessing gluten-free food can be a burden due to limited availability and variety, as well as higher costs compared to gluten-containing foods. Over the past ten years, the costs of gluten-free food have decreased; however, it remains significantly more expensive than gluten-containing food. There has been an increase in the popularity of the GFD among those without coeliac disease, which has improved the availability of gluten-free foods.
Epithelium lines both the outside (skin) and the inside cavities and lumina of bodies. The outermost layer of human skin is composed of dead stratified squamous, keratinized epithelial cells. Tissues that line the inside of the mouth, the esophagus, the vagina, and part of the rectum are composed of nonkeratinized stratified squamous epithelium. Other surfaces that separate body cavities from the outside environment are lined by simple squamous, columnar, or pseudostratified epithelial cells. Other epithelial cells line the insides of the lungs, the gastrointestinal tract, the reproductive and urinary tracts, and make up the exocrine and endocrine glands. The outer surface of the cornea is covered with fast-growing, easily regenerated epithelial cells. A specialised form of epithelium, endothelium, forms the inner lining of blood vessels and the heart, and is known as vascular endothelium, and lining lymphatic vessels as lymphatic endothelium. Another type, mesothelium, forms the walls of the pericardium, pleurae, and peritoneum. In arthropods, the integument, or external "skin", consists of a single layer of epithelial ectoderm from which arises the cuticle, an outer covering of chitin, the rigidity of which varies as per its chemical composition.
==== Suppression of glucagon in α cells ==== It has also been proposed that glucokinase plays a role in the glucose sensing of the pancreatic α cells, but the evidence is less consistent, and some researchers have found no evidence of glucokinase activity in these cells. α cells occur in pancreatic islets, mixed with β and other cells. While β cells respond to rising glucose levels by secreting insulin, α cells respond by reducing glucagon secretion. When blood glucose concentration falls to hypoglycemic levels, α cells release glucagon. Glucagon is a protein hormone that blocks the effect of insulin on hepatocytes, inducing glycogenolysis, gluconeogenesis, and reduced glucokinase activity in hepatocytes. The degree to which glucose suppression of glucagon is a direct effect of glucose via glucokinase in α cells, or an indirect effect mediated by insulin or other signals from beta cells, is still uncertain.
The first reinforcing unit into Kohima, where the Japanese suffered their first major defeat in mainland Asia, was a TA unit, 4th Battalion, Queen's Own Royal West Kent Regiment who went on to hold the Tennis Court in some of the hardest fighting of the battle. Later the commander of the 14th Army, of which they were part, Field Marshal Slim, himself a pre-First World War Territorial became Chief of the Imperial General Staff and a strong promoter of the TA, coining the expression still in use today that Territorials are 'twice a citizen'. One pre-war Guards reservist, (then) Major David Stirling set up the Special Air Service, in North Africa, which fathered several other special forces units, including the Special Boat Service. After VJ Day in August 1945, the Territorial Army was reduced and re-structured.
Sources: en.wikipedia.org
The illegal trade for tiger parts in China has driven the species to near-extinction because of its popularity in traditional medicine. Laws protecting even critically endangered species such as the Sumatran tiger fail to stop the display and sale of these items in open markets. Shark fin soup is traditionally regarded in Chinese medicine as beneficial for health in East Asia, and its status as an elite dish has led to huge demand with the increase of affluence in China, devastating shark populations. The shark fins have been a part of traditional Chinese medicine for centuries. Shark finning is banned in many countries, but the trade is thriving in Hong Kong and China, where the fins are part of shark fin soup, a dish considered a delicacy, and used in some types of traditional Chinese medicine. Restrictions are made on the accumulation and export of endangered species not raised in captivity. Australian scientists have developed methods to identify medicines containing DNA traces of endangered species. Finally, although not an endangered species, sharp rises in exports of donkeys and donkey hide from Africa to China to make the traditional remedy ejiao have prompted export restrictions by some African countries.
=== Towards type II === Viorel Badescu and Richard Cathcart have studied the possibility that a Type II civilization could use a 450 million kilometer device to direct solar radiation and thus be able to impart a kinetic motion to its star that deviates it from its usual trajectory by about 35 to 40 parsecs, allowing it, among other things, to capture its energy and navigate the galaxy. For Claude Semay, "a Type II civilization could be detected at great distances (by what is called "astro-technical leakage"), provided that it is not located in a region of the galaxy that is too distant from us, or that it does not occupy a location that is obscured from us by clouds of gas or dust".
=== Artifacts === Artifacts are structures or features in tissue that interfere with normal histological examination. Artifacts interfere with histology by changing the tissues appearance and hiding structures. Tissue processing artifacts can include pigments formed by fixatives, shrinkage, washing out of cellular components, color changes in different tissues types and alterations of the structures in the tissue. An example is mercury pigment left behind after using Zenker's fixative to fix a section. Formalin fixation can also leave a brown to black pigment under acidic conditions.
=== Hormonal treatment === D-chiro-inositol has been used to induce ovulation in women with polycystic ovary syndrome. DCI depresses the expression of the steroidogenic enzyme aromatase, which is responsible for the conversion of androgens to estrogens. One pilot study found males taking DCI had increased androgens and reduced estrogen.
== Female viceregal representatives == Below are women who have been appointed representatives of heads of state, such as female governors-general and French representatives of Andorra. As governors-general are appointed representatives of the monarch of the Commonwealth realms (currently Charles III) and the French Representatives of Andorra are appointed representatives of the French Co-Prince of Andorra (currently Emmanuel Macron), they act as heads of state and carry out on a regular basis the functions and duties associated with such a role in the Commonwealth realms (excluding the United Kingdom, which has no governor-general, as the monarch of the Commonwealth realms primarily resides there) and Andorra, respectively.
Sources: en.wikipedia.org
A maleimide moiety reacts with the thiol of cysteine-34, forming a covalent bond. The reaction occurs in circulation without enzymatic catalysis.
The group is intended to alter distribution and persistence, not receptor engagement. The peptide portion still binds the pituitary receptor, so the primary difference is duration rather than potency.
Not firmly. Early reports describe several days for the extended form, but independent confirmations are sparse, and values vary with assay method and study design.
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.