This is a working overview of GHRH analogue, written for readers who want more than a one-paragraph summary but less than a textbook.
Reviewed 2026-02-03. Anything still debated is marked as such rather than presented as settled.
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.
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.
Two forms circulate under the CJC-1295 name, and they differ by a single appended group. The version without a drug affinity complex carries four substitutions along the peptide chain, including a D-alanine near the amino terminus and replacements at three other positions. These changes block the enzyme dipeptidyl peptidase IV and remove a methionine residue that is prone to oxidation. The modified fragment is frequently labeled MOD GRF 1-29. Naming conventions are inconsistent across informal sources, which is a common source of confusion.
| 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 |
Studies in this area generally track growth hormone pulses, insulin-like growth factor 1 concentrations, and occasionally body composition endpoints. Most published human data come from early, small trials, and questions about long-term effects remain open. Whether repeated exposure alters pituitary responsiveness over time is not settled. Analytical work relies on immunoassays for the hormones and on mass spectrometry for the peptide itself, because the two measurements answer different questions.
Binding of the peptide to the growth hormone-releasing hormone receptor on pituitary somatotrophs triggers a G protein coupled cascade that raises cyclic AMP and opens calcium channels. The result is greater secretion of growth hormone into the bloodstream. Because the peptide acts at the same receptor as the natural hypothalamic hormone, its effect is amplified pulse size rather than an entirely separate release pathway. Receptor binding alone does not determine the response, since somatostatin tone and other inputs modulate the final output.
The albumin-binding version stays in circulation for days, because covalent attachment to serum albumin shields the peptide from rapid filtration and degradation. Reported half-lives for this form fall in the range of several days. The version without the linker is cleared in minutes, with estimates often near thirty minutes in animal work. These figures come from small studies and vary with assay method, species, and route, so they are best read as approximate rather than fixed constants.
Clearance profiles diverge sharply between the two versions. The albumin-binding molecule stays in plasma for several days, whereas the unmodified analog is largely gone within about half an hour in reported work. Cleavage by dipeptidyl peptidase IV is a major contributor to the short life of the unmodified sequence. These gaps mean the two versions cannot be substituted for each other in study design or in reading results side by side.
Reports on this compound commonly follow serum growth hormone and insulin-like growth factor 1 across defined time windows. Protocols differ in sampling frequency, assay platform, and participant characteristics, which makes direct comparison between publications difficult. Some work focuses on pulsatile release patterns instead of average concentrations. Whether repeated exposure alters endogenous hormone rhythms over long periods remains an open question, and the formal literature is thinner than the volume of informal commentary implies.
On 21 September 1922, in Casignana, a small town in Aspromonte, carabinieri and fascists opened fire on laborers from the “Garibaldi” agricultural cooperative, who had organized an occupation of land owned by the prince of Roccella. They killed socialist alderman Pasquale Micchia and two peasants, Rosario Conturno and Girolamo Panetta, while mayor Francesco Ceravolo was seriously wounded; this massacre ended the occupation. On 4 October 1922, at the inauguration of the Casignana Fascio, shots were fired, wounding a fascist who was part of his entourage. In retaliation, the fascists ravaged the house of the president of the “Garibaldi” cooperative, while the Carabinieri arrested a dozen antifascists. These events inspired writer Mario La Cava for his novel, The Facts of Casignana. The penetration of fascism into Calabrian society reflected the rest of the country: in city areas, merchants and industrialists were promoters of the fascists, who gained the support of the forces of law and order; in rural areas, by contrast, the backbone of fascism was represented by large landowners and village notables, who joined the new party.
=== Early history (2017–2020) === Hims, Inc. was founded in November 2017 by Andrew Dudum, Jack Abraham, and Hilary Coles as part of Atomic Labs, a San Francisco venture studio co-founded by Dudum and Abraham. It initially offered generic prescription treatments for erectile dysfunction and hair loss alongside skincare products, marketed to millennial men through a direct-to-consumer brand. Hims received $7 million in seed funding from investors including Kirsten Green of Forerunner Ventures and Josh Kushner's Thrive Capital. In 2018, Hims launched Hers, a brand targeting women's health needs including birth control, skincare, and hair regrowth treatments. In January 2019, Hims raised $100 million in a Series C funding round at a $1 billion pre-money valuation. Later that year, the company expanded internationally with a launch in the United Kingdom. In April 2020, amid the COVID-19 pandemic, Hims & Hers expanded into mental health with a rollout of free anonymous group therapy sessions, later adding online psychiatry consultations and, in 2021, individual teletherapy services.
=== Chemical reactions === Diallyl disulfide can be readily oxidized to allicin with hydrogen peroxide or peracetic acid. Allicin in turn can hydrolyze giving diallyl disulfide and trisulfide. Reaction of diallyl disulfide with liquid sulfur gives a mixture containing diallyl polysulfides with as many as 22 sulfur atoms in a continuous chain identified. When diallyl disulfide is heated it decomposes giving a complex mixture. The carbon-sulfur bond of diallyl disulfide is 16 kcal mol−1 weaker than the sulfur-sulfur bond (46 kcal mol−1 versus 62 kcal mol−1, respectively), with the consequence that on heating diallyl disulfide gives the allyldithio radical (AllSS•), which through addition to the double bonds in diallyl disulfide followed by fragmentation and subsequent reactions generates numerous organosulfur compounds, many of which are found in trace amounts in distilled garlic oil. In the presence of a catalyst, diallyl disulfide can combine with alkyl halides forming 1-alkylthio-3-allylthio-1-propene and 1,3-di(alkylthio)propene.
Following the dismissal of the Bellido cabinet, the new Vásquez cabinet hoped to replace Bellido's ultra-confrontational approach to Congress with a more conciliatory approach. Prime Minister Mirtha Vásquez held a meeting with members of Congress to negotiate on the question of trust and the presidential impeachment. Vásquez proposed a new version of the question of trust which she claimed would not cause an imbalance of power. However, it became clear that Congress would stick to their own bill. Free Peru's ally, Together for Peru, proposed a bill that would dissolve Congress if the President was impeached for moral or physical incapacity. Following that, new parliamentary elections would be held. The bill failed to pass. On 22 October 2021, the government presented a lawsuit before the Constitutional Court (CT) that Congress' reinterpretation of the question of confidence was unconstitutional. The CT unanimously admitted the case on 28 October 2021. On 2 November 2021, Eloy Espinosa-Saldaña, who was appointed rapporteur of the case, asked Congress to quickly respond to the lawsuit. Meanwhile, the Minister of Justice, Aníbal Torres, claimed that if the CT respected its past judgements, it should declare the unconstitutionality of the law that reinterprets the question of trust. On 16 November 2021, Congress formalized changes that would allow itself to reject a question of confidence as inadmissible if it's not in line with the restrictions previously passed by itself. Said restrictions are currently being challenged in the Constitutional Court.
Sources: en.wikipedia.org
Rabbit-skin glue is a type of animal glue used as a sizing and an adhesive. It is essentially refined rabbit collagen. The glue has been used for centuries for stretching and priming canvases for oil painting. It is also an ingredient in traditional gesso.
==== Tolerance ==== Tolerance and dependence are risks of chronic benzodiazepine use, and can result in doses within the therapeutic range ceasing to offer meaningful symptomatic relief after prolonged use. Tolerance develops at different rates and to different degrees to the sedative, hypnotic, anticonvulsant, muscle relaxant, and anxiolytic effects of benzodiazepines. A review of benzodiazepine tolerance concluded that it "appears that tolerance develops relatively quickly for the sedative and anticonvulsant actions of benzodiazepines, whereas tolerance to anxiolytic and amnesic effects probably does not develop at all", although the included randomized controlled trial evidence is limited to 22 weeks. A review of clonazepam in the treatment of psychiatric disorders concluded that longitudinal data supports anxiolytic benefit without tolerance during long-term use, including an open-label study finding continued benefit at three years. However, the review concludes that long-term RCT evidence is scant. A study of benzodiazepine sensitivity found that patients treated chronically with alprazolam did not differ from untreated patients in terms of anxiolytic response to diazepam, suggesting a lack of anxiolytic tolerance. However, controversy remains regarding tolerance to anxiolytic effects, with some publications reporting that there is little evidence of continued efficacy beyond 4–6 months or that dependence phenomena are common.
In 1998, Andrew Wakefield et al. published a now retracted and fraudulent The Lancet paper linking the MMR vaccine to autism, leading to a decline in vaccination rates. Wakefield was later found to have been "dishonest" by the General Medical Council and barred from practicing medicine in the UK. Numerous subsequent studies and reviews by organizations such as the US Centers for Disease Control and Prevention, Institute of Medicine, NHS and the Cochrane Library have found no evidence of a link between the MMR vaccine and autism. The controversy surrounding Wakefield's publication led to decreased MMR vaccination rates and a subsequent increase in measles cases in the UK. In Japan, where the MMR vaccine is not used as a combined vaccine, autism rates have remained unaffected, further disproving Wakefield's hypothesis. According to a 2019 Los Angeles Times article, concerns were raised about unvaccinated students contributing to the large number of measles outbreaks. While Robert F. Kennedy Jr—United States Secretary of Health and Human Services— publicly supported Wakefield's disproven theory that vaccines cause autism, and was the founder of the anti-vaccine Children's Health Defense, on 28 February, during the 2025 Southwest US measles outbreak, he announced that he would be sending 2,000 doses of the MMR vaccine to Texas along with other resources. A New York Times article reporting on the death of a child in Texas from measles—the first in ten years in the United States, said that vaccine hesitancy had been rising for many years.
== Scope == By convention of the nomenclature system, members within an individual SLC family have greater than 20-25% sequence identity to each other. In contrast, the homology between SLC families is very low to non-existent. Hence, the criteria for inclusion of a family into the SLC group is not evolutionary relatedness to other SLC families but rather functional (i.e., an integral membrane protein that transports a solute). The SLC group include examples of transport proteins that are:
=== Civil operations === An inaugural service from Moscow to Tashkent was flown on December 26, 1980, but services-proper commenced after February 1, 1981. Aeroflot first operated the Il-86 on peak domestic routes. Foreign services began in June 1981 to Eastern Europe. Services to larger West European cities began with the winter timetable starting in October that year. Charter flights to European points followed, with services on high-density medium/long-range routes within the Soviet Union coming last. Although the Il-86 was a medium-range airliner, from 1982 Aeroflot put it into scheduled service from Moscow to Havana via Shannon and Gander, "perhaps with limited payload or with additional tankerage." Other scheduled long-range services flown by the type were to Buenos Aires, Montevideo and Lima, Rio de Janeiro and São Paulo, all via Sal, Cape Verde. After the collapse of the Soviet Union in 1991, national airlines emerged in the 15 successor republics. Il-86s serving with Aeroflot administrations ("Directorates") in these nations accrued to their airlines and many were traded. From April 2002, the European Union, the US and much of the rest of the world banned noisier aircraft, including the Il-86. On October 23, 2006, Aeroflot Deputy Director General Igor Desyatnichenko said that the Il-86 was to be withdrawn from service starting November 15 that year as it operated for just two or three months in the summer."
Sources: en.wikipedia.org
Though catch bonds are now widely recognized, their mechanism of action is still under dispute. Two leading hypotheses dominate the discussion. The first hypothesis, the allosteric model, stems from evidence that x-ray crystallography of selectin proteins shows two conformational states: a bent conformation in the absence of ligand, and an extended conformation in the presence of the ligand. The main domains involved in these states are a lectin domain which contains the ligand binding site and an EGF domain which can shift between bent and extended conformations. The allosteric model claims that tension on the EGF domain favors the extended conformation, and extension of this domain causes a conformational shift in the lectin domain, resulting in greater binding affinity for the ligand. As a result of this conformational change, the ligand is effectively locked in place despite tension exerted on the bond.
The swabs collect condensed phase material from surfaces and are then inserted into a thermal desorber and ionizer assembly that then flows into the ion detector, which in most cases are an ion mobility spectrometer (IMS), but in later cases have been MS analyzers. A picture of a swab-APPI-IMS system used in airports and other security venues is given in the left figure
Valve's first product, Half-Life, was released on November 19, 1998, and published by Sierra On-Line for Windows. Players control Gordon Freeman, a theoretical physicist at the Black Mesa Research Facility, where an experiment accidentally causes a dimensional rift and triggers an alien invasion. Unlike many other games at the time, the player has almost uninterrupted control of Freeman, and the story is told mostly through scripted sequences. Half-Life received acclaim for its graphics, gameplay and seamless narrative. It won over 50 "Game of the Year" awards and is considered one of the most influential FPS games and one of the best video games ever made.
=== Isotope ratio as tracer for fingerprint === In many areas of study the origin of a chemical or group of chemicals is of central importance. Questions such as the source of environmental pollutants, the origin of hormones in an athlete's body, or the authenticity of foods and flavorings are all examples where chemical compounds need to be identified and sourced. Hydrogen isotopes have found uses in these and many other diverse areas of study. Since many processes can affect the DHR of a given compound this ratio can be a diagnostic signature for compounds produced in a specific location or via a certain process. Once the DHRs of a number of sources are known the measurement of this ratio for a sample of unknown origin can often be used to link it back to a certain source or production method.
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.
Reported values cluster in the range of several days, reflecting slow release from the albumin complex. Estimates differ across species and assay platforms. The figure describes circulation time in study settings rather than a fixed property.