A practical reference on CJC-1295: what it is, how it behaves, what the literature reports, and where the honest uncertainties sit.
This page was last updated on 2026-05-02 and is reviewed periodically as new material appears.
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 peptide binds GHRH receptors on somatotroph cells within the anterior pituitary, triggering a signalling cascade that increases growth hormone secretion. Its improved resistance to dipeptidyl peptidase IV degradation distinguishes it from the parent hormone. In the DAC-bearing version, a maleimide group reacts with a cysteine residue on serum albumin, forming a covalent bond that keeps the peptide in circulation far longer. That albumin attachment is the central design feature separating the two research variants.
Pharmacokinetic behaviour differs sharply between the two forms. The DAC-bearing peptide shows an extended circulation time measured in days, whereas the version without the complex is cleared within roughly half an hour. This gap shapes how researchers design dosing schedules in animal models. Whether the prolonged presence of the DAC form produces effects meaningfully different from the short-acting variant remains an open question, since comparative human data are scarce.
| Property | Value | Notes |
|---|---|---|
| Target receptor | GHRH receptor (GHRHR) | Expressed on pituitary somatotrophs |
| Primary action | Stimulates growth hormone release | Amplifies pulse size |
| Half-life, albumin-binding form | Several days as reported | Slow release from albumin complex |
| Half-life, unmodified analog | About 30 minutes in animal estimates | Cleared by proteases and filtration |
| Common analytical approach | LC-MS/MS for peptide, immunoassay for hormones | Methods answer different questions |
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.
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.
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.
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 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.
=== Drug development === Tew's work on redox and pharmacogenetics focused on the discovery and development of drugs. Alongside colleagues, he introduced a novel zebrafish model with a glutathione S-transferase π1 (gstp1) knockout, revealing insights into redox homeostasis, reductive stress, and responses to drugs inducing endoplasmic reticulum stress and the unfolded protein response. His research has looked into the role of GTSP in cellular redox homeostasis and its over-expression in cancer drug resistance, particularly in the context of preclinical and clinical testing of the GSTP inhibitor TLK199 (Telintra) for treating myelodysplastic syndrome. He further revealed that the absence of microsomal glutathione transferase 1 (MGST1) impacts melanin biosynthesis and melanoma growth in mice and that, in numerous species, members of the GST family are involved in early hematopoiesis, and that the lack of GSTP in dendritic cells leads to increased proliferation, ROS levels and ERα levels, suggesting a role for GSTP in controlling ERα activity and dendritic cell function. Additionally, Tew and colleagues investigated how S-glutathionylation of the protein BiP, mediated by GSTP, contributes to acquired resistance to the multiple myeloma treatment bortezomib (Btz) by impacting BiP's foldase and ATPase activities.
=== Medical === Amphetamine is used to treat attention deficit hyperactivity disorder (ADHD), narcolepsy, and, in the form of lisdexamfetamine, binge eating disorder. It is sometimes prescribed off-label for its past medical indications, particularly for depression and chronic pain.
==== Possible prebiotic environments ==== The symmetry-breaking and chiral amplification of racemic RAO only requires a prebiotic environment where RAO is available and can interact with spin-polarized magnetic surfaces. One suggested environment is an evaporative lake with magnetic sediments, such as magnetite or greigite, which gain a statistically uniform net magnetization on a hemisphere scale from the Earth's geomagnetic field. These environments could have been widespread on the early Earth, and wet-drying cycling within and at the edges of these lakes could facilitate both crystallization and replenishment of RAO, along with other prebiotic precursors important for early life.
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Sources: en.wikipedia.org
Freeze-dried ice cream, also called astronaut ice cream or space ice cream, is ice cream that has had most of the water removed from it by a freeze-drying process. Compared to regular ice cream, it can be kept at room temperature without melting, is dry and more brittle and rigid, but still soft when bitten into. It was developed by Whirlpool Corporation under contract to NASA for the Apollo missions. However, it was not used on any Apollo mission. Freeze-dried foods were developed so that foods could be sent on long-duration spaceflights (e.g. to the Moon), and to reduce the weight of the water and oxygen (which both play a significant role in food deterioration) normally found in food. The process of freeze-drying also eliminates the possibility of food melting and spilling as liquid in zero-gravity, which would be difficult to manage during missions. Freeze-drying (or lyophilization) removes water from the ice cream by lowering the air pressure to a point where ice sublimates directly from a solid to a gas. The ice cream is first placed in a vacuum chamber and frozen until any remaining water crystallizes. The air pressure is then lowered below water's triple point, creating a partial vacuum, forcing air out of the chamber; next, heat is applied, sublimating the ice; finally a freezing coil traps and turns the vaporized water into ice. This process continues for hours, resulting in a freeze-dried ice cream slice.
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The activity restriction model of depressed affect suggests that stressors that disrupt traditional activities of daily life can lead to a decrease in mental health. The elderly population is vulnerable to activity restriction because of the disabling factors related to age. Increases in scheduled activity, as well as social support, can decrease the chances of activity restriction.
A large proportion of commercial drugs (e.g. aspirin, ivermectin, cyclosporin, taxol) are derived from natural products that evolved due to their involvement in ecological interactions. While it has been proposed that the study of natural history could contribute to the discovery of new drug leads, most drugs derived from natural products were not discovered due to prior knowledge of their ecological functions. However, many fundamental biological discoveries have been facilitated by the study of plant toxins. For example, the characterization of the nicotinic acetylcholine receptor, the first neurotransmitter receptor to be identified, ensued from investigations into the mechanisms of action of curare and nicotine. Similarly, the muscarinic acetylcholine receptor takes its name from the fungal toxin muscarine. Whereas aquatic fungi provide specialized metabolites of interest for antibiotics, e.g. pestalone. Pestalone inhibits the growth of marine bacteria, the pathway to produce pestalone by marine fungi was found not to work when the bacteria is absent. The compound pestalone was derived from a marine fungus located in the Bahamas Islands on the surface of a brown alga, Rosenvingea sp. Development in biotechnology focuses on aquatic fungi in the pursuit of new antibiotics was inspired by terrestrial fungi, the cross over is not equivalent as demands in aquatic fungi are not exact to their terrestrial counter parts. Some aquatic fungi have shown changes to sphingolipid production under stressors such as acid resulting in the inhibition of biofilm formation.
Sequencing by hybridization is a non-enzymatic method that uses a DNA microarray. A single pool of DNA whose sequence is to be determined is fluorescently labeled and hybridized to an array containing known sequences. Strong hybridization signals from a given spot on the array identifies its sequence in the DNA being sequenced. This method of sequencing utilizes binding characteristics of a library of short single stranded DNA molecules (oligonucleotides), also called DNA probes, to reconstruct a target DNA sequence. Non-specific hybrids are removed by washing and the target DNA is eluted. Hybrids are re-arranged such that the DNA sequence can be reconstructed. The benefit of this sequencing type is its ability to capture a large number of targets with a homogenous coverage. A large number of chemicals and starting DNA is usually required. However, with the advent of solution-based hybridization, much less equipment and chemicals are necessary.
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=== Frontier Capital === While Knoxville's population grew steadily in the early 1800s, most new arrivals were westward-bound migrants staying in the town for a brief period. By 1807, some 200 migrants were passing through the town every day. Cattle drovers, who specialized in driving herds of cattle across the mountains to markets in South Carolina, were also frequent visitors to the city. The city's merchants acquired goods from Baltimore and Philadelphia via wagon trains. French botanist André Michaux visited Knoxville in 1802, and reported the presence of approximately 100 houses and 10 "well-stocked" stores. While there was "brisk commerce" at the city's stores, Michaux noted, the only industries in the city were tanneries and blacksmiths. In February 1804, itinerant Methodist preacher Lorenzo Dow passed through Knoxville, and reported the widespread presence of a religious phenomenon in which worshippers would fall to the ground and go into seizure-like convulsions, or "jerks," at religious rallies. Illinois governor John Reynolds, who studied law in Knoxville, recalled a raucous, anti-British celebration held in the city on July 4, 1812, at the onset of the War of 1812. On October 27, 1815, Knoxville officially incorporated as a city. The city's new charter set up an alderman-mayor form of government, in which a Board of Aldermen was popularly elected, and in turn selected a mayor from one of their own.
== Taxonomy == The classification of this species has been revised in recent decades. Puffballs, earthballs, earthstars, stinkhorns and several other kinds of fungi were once thought to be related and were known as the gasteromycetes or 'stomach' fungi, because the fertile material develops inside spherical or pear-shaped fruiting bodies; however, this group is now known to be polyphyletic. Today, some authors place the giant puffball and other members of the genus Calvatia in order Agaricales. The giant puffball has also been placed in two other genera, Lycoperdon and Langermannia, in years past. The current view is that the giant puffball belongs in Calvatia.
"Sometimes Always", taken from Stoned & Dethroned, became the band's most commercially successful single in the US as it peaked at No. 96 on the Billboard Hot 100. The band departed from WEA after ten years, and then signed with Sub Pop Records in the US and re-signed with Creation Records in the UK for the release of the album Munki in 1998. The band broke up the following year as a result of an onstage altercation the year prior; William Reid prematurely left a tour after fighting with an intoxicated Jim Reid. They eventually reunited in 2007, and in 2017, they released Damage and Joy, their first studio album in 19 years and seventh overall. Their next album, Glasgow Eyes, was released in 2024 and became the band's first top 10 album in the UK since 1988.
== Etymology == The word water comes from Old English wæter, from Proto-Germanic *watar (source also of Old Saxon watar, Old Frisian wetir, Dutch water, Old High German wazzar, German Wasser, vatn, Gothic 𐍅𐌰𐍄𐍉 (wato)), from Proto-Indo-European *wod-or, suffixed form of root *wed- ('water'; 'wet'). Also cognate, through the Indo-European root, with Greek ύδωρ (ýdor; from Ancient Greek ὕδωρ (hýdōr), whence English 'hydro-'), Russian вода́ (vodá), Irish uisce, and Albanian ujë.
Sources: en.wikipedia.org
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.
Typical endpoints include growth hormone pulse frequency and amplitude, together with insulin-like growth factor 1 concentration. Some protocols add body composition or metabolic markers. Interpretation depends on baseline hormonal status, which varies widely between individuals.
Most human data come from small, early-stage studies, and independent replication is limited. Short-term effects on growth hormone release are documented; longer-term outcomes are not well characterized. Open questions include changes in pituitary responsiveness after repeated exposure.
The synthetic peptide keeps the receptor-binding region of GHRH but carries substitutions that resist enzymatic cleavage. In the DAC version, an added group also anchors the molecule to albumin, extending its presence in the bloodstream.