GHRH analog 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 2025-09-04. Where a claim depends on a specific study, the study is described rather than over-claimed.
The peptide backbone includes a D-alanine at position two, which resists cleavage by dipeptidyl peptidase IV, and several other substitutions that reduce degradation. Its molecular weight is roughly 3.4 kDa without the linker and about 3.6 kDa with it. The molecule is water soluble and is normally supplied as a lyophilized powder. Precise sequence and mass values depend on which variant is described, so technical documents usually state the exact form being referenced.
CJC-1295 is a synthetic peptide designed as a long-acting analogue of growth hormone-releasing hormone (GHRH). Its structure derives from the first 29 amino acids of native GHRH, a fragment often called GRF(1-29). Four substitutions were introduced to slow enzymatic breakdown and extend activity relative to the natural sequence. The compound was developed by ConjuChem as part of a broader effort to improve the pharmacokinetic profile of peptide hormones. It is studied in laboratory and clinical research settings rather than appearing as a naturally occurring substance.
Two related forms circulate in technical discussion under the same family name. The original version carries a drug affinity complex (DAC) that binds covalently to serum albumin after administration, and this linkage substantially extends circulation time. A second form, frequently written as modified GRF(1-29) or CJC-1295 without DAC, lacks that linker and clears much faster. The naming is a frequent source of confusion because the shorthand CJC-1295 can refer to either form depending on the source. Reports sometimes fail to specify which variant was studied.
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.
| Property | Value | Notes |
|---|---|---|
| Molecular weight (no linker) | ~3.37 kDa | Calculated from peptide sequence |
| Molecular weight (with linker) | ~3.65 kDa | Includes albumin-binding moiety |
| Appearance | White to off-white powder | Typically lyophilized |
| Solubility | Soluble in water | Also dissolves in aqueous buffers |
| Common synonyms | Modified GRF(1-29), DAC:GRF | Usage varies by source |
Two principal forms appear in the literature and in research supply. One carries a drug affinity complex, a maleimide-based group that forms a covalent bond with circulating albumin. This linkage slows clearance and produces a long-lasting elevation of peptide levels. The other form lacks that group and is often labeled MOD GRF(1-29). It has a much shorter circulation time. Both variants retain the same core receptor-binding sequence. Reported half-lives differ substantially between the two.
At the pituitary, the peptide binds the growth hormone-releasing hormone receptor on somatotroph cells. Receptor activation raises intracellular cyclic AMP and triggers release of stored growth hormone. Somatostatin and other hypothalamic signals modulate this response. Negative feedback from insulin-like growth factor 1 also influences output. The same regulatory architecture operates with the native hormone. Whether the synthetic analog alters feedback dynamics over repeated exposure remains an open question. Most published receptor work uses cell models rather than intact human systems.
CJC-1295 is a synthetic peptide belonging to the growth hormone-releasing hormone analog family. It comprises twenty-nine amino acid residues derived from the N-terminal region of natural GHRH. The molecule incorporates several non-natural substitutions that increase resistance to enzymatic degradation. These modifications extend its activity compared with the native hormone fragment. Researchers use it to study pituitary growth hormone secretion in laboratory and clinical settings. This compound is distinct from native GHRH in its stability profile.
The core sequence keeps the receptor-binding region of GHRH while replacing four positions that are vulnerable to dipeptidyl peptidase-4 and other proteases. Substitutions at positions 2, 8, 15, and 27 raise metabolic stability relative to the natural hormone. The N-terminal residues remain essential for activity, so changes there generally lower potency. Molecular weight sits near 3368 daltons for the tetrasubstituted analog without the linker, while the albumin-binding form is heavier because of the added maleimide group.
CJC-1295 is a synthetic peptide modeled on growth hormone-releasing hormone, the hypothalamic signal that prompts the pituitary to release growth hormone. Its sequence corresponds to the first twenty-nine residues of human GHRH, with four substitutions that slow enzymatic breakdown. Early descriptions placed the compound in research on growth hormone deficiency and related conditions, and later literature groups it with the long-acting GHRH analogs. The name appears in both laboratory and popular fitness writing, where it sometimes labels chemically different peptides.
Knowledge of DNA sequences has become indispensable for basic biological research, DNA Genographic Projects and in numerous applied fields such as medical diagnosis, biotechnology, forensic biology, virology and biological systematics. Comparing healthy and mutated DNA sequences can diagnose different diseases including various cancers, characterize antibody repertoire, and can be used to guide patient treatment. Having a quick way to sequence DNA allows for faster and more individualized medical care to be administered, and for more organisms to be identified and cataloged. The first DNA sequences were obtained in the early 1970s by academic researchers using laborious methods based on two-dimensional chromatography. Following the development of fluorescence-based sequencing methods with a DNA sequencer, DNA sequencing has become easier and orders of magnitude faster.
Eva Megyar as Katherine, (season 1), Hermione's grandmother Monica Lacy as Janis Copeland (season 1), an agent of the Department of Statistical Anomalies (DOSA) Josh Gates as an archaeologist and former colleague of Connor's (season 2) Jeremy Swift as a flamboyant genie (season 2), who can grant wishes to anyone who explicitly states "I wish" if he is released and unbound from his bottle Flula Borg and Britta Boehlke, respectively, as Gunther and Hilda (season 2), two hosts of a popular cooking show who are secretly a magically-charged, cannibalistic Hansel and Gretel Oliver Dench as Robert/"The Red Rock", a kindly scientist and Lysa's love interest who secretly uses a strength-boosting artifact to fight crime as a superhero, unaware it turns those around him into criminals to fight Claudia Summers as Jill Pascal (season 2), Lysa's late mother Evan Milton as Luc Pascal (season 2), Lysa's late father Holly Donovan as Amy Scott (season 2) Lindy Booth (season 2) as Cassandra Cillian, one of the Librarians from the Portland Annex who specializes in mathematics and practices magic. She was introduced in The Librarians and officially joined the Library at the same time as Jacob Stone.
==== UPMC Passavant ==== UPMC Passavant is UPMC's tertiary care hospital of Pittsburgh's northern suburbs that consist of two campuses, one in McCandless and another in Cranberry Township with a combined 423 beds. Founded by Lutherans in 1849, Passavant was the first Protestant hospital built in the United States. In 1964, Passavant moved from the City of Pittsburgh to its location in McCandless to serve the communities of northern Allegheny and southern Butler counties. Passavant merged with UPMC in 1997 and in 2002, as part of UPMC's acquisition of St. Francis Medical Center for the conversion of its flagship facility into the new Children's Hospital of Pittsburgh, UPMC converted St. Francis' hospital in Cranberry into a satellite campus of UPMC Passavant. In 2010, a seven-story 188,000 square foot patient pavilion was opened on the McCandless campus bringing total beds there to 399.
==== Rare side effects ==== Infrequent adverse reactions in patients taking opioids for pain relief include: dose-related respiratory depression (especially with more potent opioids), confusion, hallucinations, delirium, urticaria, hypothermia, bradycardia/tachycardia, orthostatic hypotension, dizziness, headache, urinary retention, ureteric or biliary spasm, muscle rigidity, myoclonus (with high doses), and flushing (due to histamine release, except fentanyl and remifentanil). Both therapeutic and chronic use of opioids can compromise the function of the immune system. Opioids decrease the proliferation of macrophage progenitor cells and lymphocytes, and affect cell differentiation (Roy & Loh, 1996). Opioids may also inhibit leukocyte migration. However the relevance of this in the context of pain relief is not known.
CEEs are prodrugs of the active forms of the estrogens. Sodium estrone sulfate is a prodrug of estrone, which in turn is a prodrug of estradiol, while sodium equilin sulfate is a prodrug of equilin and then of 17β-dihydroequilin. As such, the major active estrogens with CEEs are estradiol and 17β-dihydroequilin, which have potent estrogenic activity and account for most of the effects of CEEs. The 17α-estrogens in CEEs such as 17α-estradiol and 17α-dihydroequilin have low estrogenicity and are thought to contribute minimally to its effects. There are many different steroids in natural CEE products like Premarin, as many as 230 compounds and including even androgens and progestogens, but only the estrogens are present in sufficient amounts to produce clinically-relevant effects. A dosage of 0.625 mg/day oral CEEs has been found to increase SHBG levels by 100%. For comparison, 1 mg/day oral estradiol increased SHBG levels by 45%, while 50 μg/day transdermal estradiol increased SHBG levels by 12%. Ethinylestradiol is more potent in its effects on liver protein synthesis than either CEEs or estradiol, with 10 μg/day oral ethinylestradiol having been found to be approximately equivalent to 1.25 mg/day CEEs.
Sources: en.wikipedia.org
==== Arsenic-based drugs ==== Despite, or possibly because of, its long-known toxicity, arsenic-containing potions and drugs have a history in medicine and quackery that continues into the 21st century. Starting in the early 19th century and continuing into the 20th century, Fowler's solution, a toxic concoction of sodium arsenite, was sold. The organoarsenic compound Salvarsan was the first synthetic chemotherapeutic agent, discovered by Paul Ehrlich. The treatment, however, led to many problems causing long lasting health complications. Around 1943 it was finally superseded by penicillin. The related drug Melarsoprol is still in use against late-state African trypanosomiasis (sleeping sickness), despite the substance's possibly fatal side effects. Arsenic trioxide (As2O3) inhibits cell growth and induces apoptosis (programmed cell death) in certain types of cancer cells, which are normally immortal and can multiply without limit. Arsenic trioxide-induced necrosis has been shown to provoke immune activation through release of damage-associated molecular patterns (DAMPs). In combination with all-trans retinoic acid, it is FDA-approved as first-line treatment for promyelocytic leukemia.
Encouraged by South Africa's apparent failure to detect the initial incursion, larger insurgent groups made their own infiltration attempts in February and March 1966. The second unit, "Group 2", was led by Leonard Philemon Shuuya, also known by the nom de guerre "Castro" or "Leonard Nangolo". Group 2 apparently become lost in Angola before it was able to cross the border, and the guerrillas dispersed after an incident in which they killed two shopkeepers and a vagrant. Three were arrested by the Portuguese colonial authorities in Angola, who were working off tips received from local civilians. Another eight, including Shuuya, had been captured between March and May by the South African police, apparently in Kavangoland. Shuuya later resurfaced at Kongwa, claiming to have escaped his captors after his arrest. He helped plan two further incursions: a third SWALA group entered Ovamboland that July, while a fourth was scheduled to follow in September.
monoclonal Describing cells, proteins, or molecules descended or derived from a single clone (i.e. from the same genome or genetic lineage) or made in response to a single unique compound. Monoclonal antibodies are raised against only one antigen or can only recognize one unique epitope on the same antigen. Similarly, the cells of some tissues and neoplasms may be described as monoclonal if they are all the asexual progeny of one original parent cell. Contrast polyclonal.
=== Phytoestrogens === Isoflavones, which are structurally related to 17β-estradiol, are classified as phytoestrogens. A risk assessment by the European Food Safety Authority found no cause for concern when isoflavones are consumed in a normal diet.
Sources: en.wikipedia.org
== Current usage == Many "omes" beyond the original "genome" have become useful and have been widely adopted by research scientists. "Proteomics" has become well-established as a term for studying proteins at a large scale. "Omes" can provide an easy shorthand to encapsulate a field; for example, an interactomics study is clearly recognisable as relating to large-scale analyses of gene-gene, protein-protein, or protein-ligand interactions. Researchers are rapidly taking up omes and omics, as shown by the explosion of the use of these terms in PubMed since the mid-1990s.
=== Glucocorticoid activity === CPA is an agonist of the glucocorticoid receptor (GR), and has weak and partial glucocorticoid activity at high doses. In animals, CPA suppresses the secretion of adrenocorticotropic hormone (ACTH) from the pituitary gland, suppresses the production of corticosteroids like cortisol and corticosterone by the adrenal cortices, and decreases the weights of the adrenal glands and thymus. Conversely however, CPA shows no anti-inflammatory or eosinophilic effects in animals. As such, CPA, as well as related antiandrogens, show only some of the typical effects of glucocorticoids. CPA may produce mild glucucorticoid actions at high doses of more than 100 mg/day in humans. Clinically, the glucocorticoid effects of CPA appear to be relevant only at high doses in people with small body sizes (CPA exposure of more than 80 to 100 mg/m2), namely in the treatment of children with precocious puberty. No signs of secondary adrenal insufficiency have been observed with CPA. While various studies have clearly shown reduced cortisol and ACTH levels and ACTH responsiveness in humans with CPA therapy, some studies contradict these findings and report no such effects even with high doses of CPA. Due to negative feedback on the hypothalamic–pituitary-adrenal (HPA) axis, administration of exogenous glucocorticoids such as prednisone and dexamethasone suppress the secretion of adrenocorticotropic hormone (ACTH) from the pituitary gland and the production of cortisol from the adrenal glands.
Cyclone Tam causes significant power outages in Northland and leads to the cancellation of flights and ferry services in Auckland. 17 April – Cyclone Tam causes over 6,000 properties in Northland, the Coromandel Peninsula, Bay of Plenty and Gisborne to lose power overnight. 18 April – Cyclone Tam causes flooding to roads and highways in the Coromandel Peninsula. Flooding and strong-winds are also reported in the Far North District, leading to road closures and flight disruptions. 19 April – Cyclone Tam causes flooding, thunderstorms and travel disruptions in Auckland. Local authorities issue an emergency alert. 20 April: Auckland authorities issue a second emergency alert in response to flooding and thunderstorms caused by Cyclone Tam. 70 protesters affiliated with the Happy Valley Coalition occupy a fast-tracked coal mine on the Denniston Plateau near Westport. 21 April – Cyclone Tam begins easing, despite heavy rain and thunderstorms across New Zealand. Power companies work on restoring power to Northland homes. The Auckland Council inspects 16 flood-damaged properties. 22 April – Power companies restore power to most houses in Northland, with 25 Far North homes remaining disconnected. 23 April – Police remove the last remaining protesters from a coal mine in the Denniston Plateau. Seven people were charged with trespassing while three were arrested. 24 April – A fire breaks out at a recycling plant in the Wairau Valley in Auckland's North Shore, causing significant damage including a chemical spill contaminating several beaches in the North Shore.
In an incomplete elution, part of the analytes remain in the sorbent because the eluent used does not have a strong enough affinity. Many of the adsorbents/materials are the same as in chromatographic methods, but SPE is distinctive, with aims separate from chromatography, and so has a unique niche in modern chemical science.
With the invention of the Geiger gaseous ionization detector in 1913, which became the Geiger-Müller gaseous ionization detector in 1928 - named after the physicists Hans Geiger (1882-1945) and Walther Müller (1905-1979) - the individual particles or quanta of ionizing radiation could be detected and measured. Detectors developed later, such as proportional counters or scintillation counters, which not only "count" but also measure energy and distinguish between types of radiation, also became important for radiation protection. Scintillation measurement is one of the oldest methods of detecting ionizing radiation or X-rays; originally, a zinc sulfide screen was held in the path of the beam and the scintillation events were either counted as flashes or, in the case of X-ray diagnostics, viewed as an image. A scintillation counter known as a spinthariscope was developed in 1903 by William Crookes (1832-1919) and used by Ernest Rutherford (1871-1937) to study the scattering of alpha particles from atomic nuclei.
Sources: en.wikipedia.org
No. It is a synthetic analogue modeled on the first 29 residues of human GHRH. The substitutions and any linker are laboratory modifications rather than features of the endogenous peptide.
Early development used the albumin-binding form, and a shorter variant was later discussed under the same label. Because the two differ in half-life and handling, ambiguity arises whenever a source omits the variant designation.
The compound derives from that fragment but is not identical to it. The parent fragment lacks the stabilizing substitutions, so its degradation rate and duration of action differ noticeably.
No. It is a laboratory-made analog of growth hormone-releasing hormone. The natural hormone is a 44-residue peptide, while the analog is built on a shorter 29-residue fragment.