Everything below concerns GHRH analog. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Updated 2025-12-14. Numbers and descriptions here follow the published literature rather than marketing material.
Binding to GHRH receptors on pituitary somatotroph cells triggers cyclic AMP signaling and stimulates growth hormone synthesis and release. Because the peptide acts upstream of the pituitary, effects are mediated through endogenous growth hormone rather than direct receptor activation in peripheral tissues. Increases in insulin-like growth factor 1 are generally described as a downstream consequence. Most published human exposure data come from small early-stage studies, and the clinical significance of the pharmacokinetic profile remains incompletely characterized.
CJC-1295 is a synthetic analogue of growth hormone-releasing hormone, built on the 29-amino-acid GHRH(1-29) fragment. Four substitutions distinguish it from the natural sequence: D-alanine at position 2, glutamine at position 8, alanine at position 15, and leucine at position 27. These changes reduce enzymatic cleavage and extend the peptide's persistence in circulation. The compound is discussed in two forms, one carrying a drug affinity complex and one without it.
The drug affinity complex is a maleimidopropionic acid group attached to a lysine side chain. It reacts with the free thiol of cysteine-34 on circulating albumin, forming a covalent bond. This conjugation keeps the peptide in the bloodstream and shields it from rapid renal filtration and proteolysis. Reported circulation half-lives for the albumin-bound form fall in the range of roughly six to nine days in early human studies.
The dividing feature between the two forms is a maleimide-based drug affinity complex, abbreviated DAC. In the DAC-bearing version, a linker attaches the peptide to serum albumin after administration, and that association slows removal from plasma. The version lacking DAC appears in catalogs as MOD GRF(1-29) or tetrasubstituted GRF(1-29). Because informal writing treats both as one item, comparisons drawn from such sources routinely blend measurements taken from two molecules with substantially different behavior.
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.
| Property | Value | Notes |
|---|---|---|
| Physical form | Lyophilized white powder | Supplied as a freeze-dried solid for research use |
| Molecular weight | Approximately 3,647 Da (DAC form) | Lower for the variant lacking the albumin-binding moiety |
| Solubility | Soluble in water and aqueous buffer | Typically dissolved in sterile or bacteriostatic water |
| Typical storage temperature | −20 °C or below | Dry powder, desiccated and protected from light |
| Common analytical method | Reversed-phase HPLC with mass spectrometry | Used for purity estimation and identity confirmation |
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 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.
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.
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.
=== Treatment of type 2 diabetes === They are widely used as antidiabetic drugs in the management of diabetes mellitus type 2. They act by increasing secretion of insulin from the beta cells in the pancreas. Sulfonylureas are ineffective where there is absolute deficiency of insulin production such as in type 1 diabetes or post-pancreatectomy. Sulfonylureas can be used to treat some types of neonatal diabetes. Historically, people with hyperglycemia and low blood insulin levels were diagnosed with type 1 diabetes by default, but it has been found that patients who receive this diagnosis before 6 months of age are often candidates for receiving sulfonylureas rather than insulin throughout life. A 2011 Cochrane systematic review evaluated the effects on treatment of Latent Autoimmune Diabetes in Adults (LADA) and found that Sulfonylureas did not improve metabolic control of glucose at 3 and 12 months, even worsening HbA1c levels in some cases, when compared to insulin. The same review did not find improvement of fasting C-peptide following treatment with sulfonylurea. Still, it is important to highlight that the studies available to be included in this review presented considerable flaws in quality and design. While prior sulfonylureas were associated with worse outcomes, newer agents do not appear to increase the risk of death, heart attacks, or strokes.
In April 2012, the Xinjiang Border Defense Corps Female Special Service team (新疆公安边防总队女子特勤分队) was founded. In March 2015 it was renamed to the "Snowy Eagle Female Special Service team" (雪鹰女子特勤分队) at the Xinjiang Border Corps Training Base. At its founding in 2012, it only had 6 members, and by March 2015 it had 34 members. It assisted in security at the China Eurasia Expo multiple times. The Shenzhen Border Defense Detachment operated the Maritime Special Service Team (Nicknamed "Maritime Jiaolongs"), a police tactical unit which is dedicated to maritime anti-terrorism, search and rescue, combat diving and VBSS.
Despite the underlying notion of the lab as a confined space for experts, the term "laboratory" is also increasingly applied to workshop spaces such as Living Labs, Fab Labs, or Hackerspaces, in which people meet to work on societal problems or make prototypes, working collaboratively or sharing resources. This development is inspired by new, participatory approaches to science and innovation and relies on user-centred design methods and concepts like Open innovation or User innovation. One distinctive feature of work in Open Labs is the phenomenon of translation, driven by the different backgrounds and levels of expertise of the people involved.
==== Marketed ==== Dextromethorphan (DXM; Robitussin) Dextropropoxyphene (Darvon) Dimenhydrinate (Dramamine) Diphenhydramine (Benadryl) Mepyramine (pyrilamine) (Anthisan) Mifepristone (Korlym, Mifeprex)
Sources: en.wikipedia.org
(1.2) Keey et al. (2000) use a different definition of the fibre saturation point (equilibrium moisture content of wood in an environment of 99% relative humidity). Many properties of wood show considerable change as the wood is dried below the fibre saturation point, including:
Each country has its own laws and regulations for the import and export of goods into and out of a country, which its customs authority enforces. The import or export of certain goods may be restricted or prohibited, in which case customs controls enforce these policies. Customs enforcement at borders can also entail collecting excise tax and preventing the smuggling of dangerous or illegal goods. A customs duty is a tariff or tax on the importation (usually) or exportation (unusually) of goods. In many countries, border controls for arriving passengers at many international airports and some road crossings are separated into red and green channels to prioritise customs enforcement. Within the European Union's common customs area, airports may operate additional blue channels for passengers arriving from within that area. For such passengers, border control may focus specifically on prohibited items and other goods that are not covered by the common policy. Luggage tags for checked luggage travelling within the EU are green-edged to facilitate identification. In most EU member states, travellers coming from other EU countries within the Schengen Area can use the green lane. However, airports outside the Schengen Area, or those with frequent flights arriving from jurisdictions within the Schengen Area but outside the European Union, may use blue channels for convenience and efficiency. A customs area is a designated area for storing commercial goods that have not cleared border controls.
oxidative phosphorylation Also electron transport-linked phosphorylation or terminal oxidation. The process by which cells use chemical energy obtained by the oxidation of nutrients to power the production of adenosine triphosphate (ATP). Oxidative phosphorylation couples two related processes: in the electron transport chain, a series of enzyme-catalyzed redox reactions transfers electrons from energetic donors such as NADH and FADH through various intermediates and ultimately to a terminal electron acceptor such as molecular oxygen (O2); the energy liberated by these reactions is simultaneously used in chemiosmosis to move protons (H+) across a membrane and against their concentration gradient, generating an electrochemical potential which powers ATP synthase, an enzyme that catalyzes the phosphorylation of ADP into ATP. In eukaryotes, both of these processes are carried out by proteins embedded in the membranes of mitochondria and chloroplasts; in prokaryotes, they occur in the cell membrane.
C2H2 + H2O → CH3CHO The mishandling Hg-containing waste stream of the Chisso process led to an environmental catastrophe causing Minamata disease. Ethylidene diacetate, a precursor to acetaldehyde and vinyl acetate, was also produced by a similar process. Some of these routes, once dominant, have been significantly displaced by the Pd-catalyzed Wacker process, a greener process that starts with ethylene. In general oxymercuration reactions of alkenes and alkynes using mercuric compounds proceed via organomercury intermediates. A related reaction forming phenols is the Wolffenstein–Böters reaction.
Prolactin is a peptide hormone primarily produced in the anterior pituitary gland. Prolactin affects reproduction and lactation in humans and other non-human mammals. It is also thought to mediate the formation of social bonds between mothers and their infants, much like the hormone oxytocin. In addition to prolactin's role in the formation of social bonds, it is thought to be involved in romantic attachment, especially in its early stages. Prolactin may also act to mediate well-being and the positive effects of close relationships on one's health. To do so, it alters an individual's neuroendocrine system to increase the probability of forming a strong social bond without requiring long gestation periods; this may enable bonding between mother and child in cases of adoption. Prolactin can also influence both maternal and paternal behavior. The administration of prolactin to female rats initiates maternal behavior, and in bird and fish fathers, it can increase paternal behavior, whereas antagonists to prolactin decrease paternal behavior. In human studies, fathers with higher prolactin concentrations are more alert and nurturing towards their infants. In a different study where fathers and infants were observed over a six-months period after the child was born, the researchers found that fathers with higher prolactin levels were more likely to facilitate play with their infant. Moreover, following the birth of the child, prolactin promotes bonding between the father and the newborn. Prolactin levels can also increase during socially stressful situations in humans.
Sources: en.wikipedia.org
=== Early life and education === William H. Stein was born on June 25, 1911 in New York City into a Jewish family. His father, Fred M. Stein, was a businessman who retired early to support local New York health organizations. His mother, Beatrice Borg Stein, was a children's rights activist who developed afterschool activities. Staunch advocates for the welfare of society, Stein's parents fostered his interests in the life sciences from a young age. As a child, Stein attended the recently established "progressive" Lincoln School which was sponsored by the Teachers College of Columbia University; there, he was able to explore the natural sciences through field trips and science projects. At the age of sixteen, Stein was transferred to the Phillips Exeter Academy in New England to prepare for higher education. In 1936, during his graduate studies at Columbia University, William H. Stein married Phoebe Hockstader. They had three sons together: William H. Stein, Jr., David F. Stein, and Robert J. Stein. Stein lived with his family in New York the rest of his life—mainly in Manhattan and briefly in Scarsdale, New York.
The role of caregivers for youth with mental health needs is valuable, and caregivers benefit most when they have sufficient psychoeducation and peer support. Depression is one of the leading causes of illness and disability among adolescents. Suicide is the fourth leading cause of death in 15-19-year-olds. Exposure to childhood trauma can cause mental health disorders and poor academic achievement. Ignoring mental health conditions in adolescents can impact adulthood. 50% of preschool children show a natural reduction in behavioral problems. The remaining experience long-term consequences. It impairs physical and mental health and limits opportunities to live fulfilling lives. A result of depression during adolescence and adulthood may be substance abuse. The average age of onset is between 11 and 14 years for depressive disorders. Only approximately 25% of children with behavioral problems refer to medical services. The majority of children go untreated. A global study of more than 275,000 adolescents aged 12–17 years across 82 countries found that 14% had experienced suicidal thoughts and 9% had anxiety over a 12-month period; adolescents with fewer peer and parental supports and greater exposure to peer conflict, victimisation, and loneliness were at higher risk, and 36 of the 82 countries studied had no specific national mental health policy.
The origin of cells has to do with the origin of life, which began the history of life on Earth. Small molecules needed for life may have been carried to Earth on meteorites, created at deep-sea hydrothermal vents, or synthesized by lightning in a reducing atmosphere. There is little experimental data defining what the first self-replicating forms were. RNA may have been the earliest self-replicating molecule, as it can both store genetic information and catalyze chemical reactions. This process required an enzyme to catalyze the RNA reactions, which may have been the early peptides that formed in hydrothermal vents. Cells emerged around 4 billion years ago. The first cells were most likely heterotrophs. The early cell membranes were probably simpler and more permeable than later ones, with only a single fatty acid chain per lipid. Lipids spontaneously form bilayered vesicles in water, and could have preceded RNA.
==== Feud with Vince McMahon (1998–1999) ==== After Bret Hart's controversial departure for WCW, Austin and Michaels were the top stars in the company. Austin won the 1998 Royal Rumble, lastly eliminating The Rock. The next night on Raw, Austin interrupted Vince McMahon in his presentation of Mike Tyson, who was making a special appearance, over the objection of McMahon referring to Tyson as "the baddest man on the planet". Austin insulted Tyson by flipping him off, which led to Tyson shoving Austin much to McMahon's embarrassment, who began publicly to disapprove of the prospect of Austin as his champion. Tyson was later announced as "the special enforcer" for the main event at WrestleMania XIV, and aligned himself with Michaels's stable D-Generation X (DX). This led to Austin's WWF Championship match against Michaels at WrestleMania XIV, which he won with help from Tyson, who turned on DX by making the deciding three-count against Michaels and later hit him with his knock-out punch. This was Michaels's last match until 2002 as he had suffered two legitimate herniated discs and another completely crushed at the hands of The Undertaker in a casket match at the Royal Rumble. With Michaels's absence and Austin winning the WWF Championship, the "Austin Era" was ushered in.
Sources: en.wikipedia.org
The two share the same 29-amino-acid backbone. CJC-1295 carries an additional albumin-binding moiety that markedly extends its residence time in circulation, while the form without that moiety clears faster. Literature sometimes applies the name loosely to either variant.
It has not been approved by major regulatory agencies for any therapeutic indication. Material sold under this name is typically distributed for laboratory research only. Clinical use is not supported by large controlled trials.
Early human studies of the albumin-binding form reported circulation half-lives on the order of several days. The value depends on assay method and study design. Estimates for the form without the binding moiety are considerably shorter.
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.