If you have been reading about CJC-1295 and want a single page that covers the useful parts, this is it: definitions, context, how it is studied, and the questions that come up repeatedly.
Updated 2025-10-12. Numbers and descriptions here follow the published literature rather than marketing material.
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.
Research material is normally supplied as a freeze-dried powder in sealed vials. In that state the peptide is comparatively robust, but prolonged exposure to warmth, moisture, or light accelerates degradation. Storage at minus twenty degrees Celsius or lower, with desiccant and protection from light, is the commonly described practice. Vials should be allowed to reach room temperature before opening to limit condensation on the powder. Moisture uptake during handling is a recognized source of variability in later measurements.
Reconstitution is typically performed with sterile water or bacteriostatic water, added slowly against the vial wall. The resulting solution should be clear and colorless; cloudiness or visible particles suggest a problem with the material or the diluent. Once in solution, the peptide is less stable than the dry powder. Refrigerated storage at two to eight degrees Celsius is common for short-term holding, while freezing aliquots is described for longer periods.
| Property | Value | Notes |
|---|---|---|
| Peptide class | Synthetic GHRH analogue | Built on a 29 residue sequence |
| Primary target | GHRH receptor (GHRHR) | Class B G protein coupled receptor |
| Unconjugated half life | Minutes | Limited by protease degradation |
| Key modification | Four residue substitutions | Positions 2, 8, 15 and 27 |
| Common synonym | Modified GRF(1-29) | Usually denotes the form without DAC |
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.
Two related peptides circulate under the CJC-1295 label, and they differ mainly in how long they persist in circulation. The version carrying a drug affinity complex includes a maleimidopropionic acid linker that forms a covalent bond with serum albumin. The other version, usually written as modified GRF(1-29) or tetrasubstituted GRF(1-29), lacks that linker and is cleared quickly. Mixing the two produces inconsistent readings of published half-life values, because the linker rather than the receptor-facing sequence drives most of the difference.
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.
Elam came under the domination of Akkad in the time of Sargon though it remained restive. The 2nd ruler of Akkad, Rimush, campaigned there afterward adding "conqueror of Elam and Parahsum" to his royal titulary. The 3rd ruler, Manishtushu, conquered the city of Anshan in Elam and also the city of Pashime, installing imperial governors in those places. Naram-Sin added "commander of all the land of Elam, as far as Parahsum," to his royal titulary. During his rule, "military governors of the country of Elam" (shakkanakkus) with typically Akkadian names are known, such as Ili-ishmani or Epirmupi. This suggests that these governors of Elam were officials of the Akkadian Empire. Naram-Sin exercised great influence over Susa during his reign, building temples and establishing inscriptions in his name, and having the Akkadian language replace Elamite in official documents.
She wore an imported black satin dress heavily beaded with tiny black jet beads, black satin slippers, beaded, and had on her rarely beautiful diamonds. ... She stood before us, seemingly slight, graceful of carriage, and exquisitely beautiful even to critical eyes. Then, still standing, she faced her class as one who knew herself to be a teacher by divine right. She turned to the student at the end of the first row of seats and took direct mental cognizance of this one, plainly knocked at the door of this individual consciousness. ... This continued until each member of the class had received the same mental cognizance. No audible word voiced the purely mental contact. It was in part because of her unusual personality that Christian Science flourished, despite the numerous disputes she initiated among her followers. "She was like a patch of colour in those gray communities," McClure's wrote, "She never laid aside her regal air; never entered a room or left it like other people." Mark Twain, a prominent critic of hers, described her in 1907 as "vain, untruthful [and] jealous", but "[i]n several ways ... the most interesting woman that ever lived, and the most extraordinary".
==== Sexist remarks ==== On several occasions throughout his third term, Lula, speaking extemporaneously, made comments which were largely regarded as sexist. In May 2024, while announcing measures for those affected by the floods in Rio Grande do Sul, he said that "a washing machine is a very important thing for women". The next day, at a ceremony for the delivery of housing units, he said he had spoken with a 27-year-old woman with 5 children, and asked "When are you going to close the gate, comrade?". At a meeting held in the Palácio do Planalto in July 2024, Lula commented on the result of a study that found that violence against women increases after football matches, concluding: "Unbelievable. If the guy is a Corinthians supporter, that's fine". At the event marking the 2 years since the January 8 attacks, he said "I am a lover of democracy, I am not even a husband, I am a lover of democracy, because, most of the time, lovers are more passionate about their lovers than about their wives". In March 2025, at a ceremony at the Palácio do Planalto, Lula said that he had appointed a "beautiful woman" as Minister of Institutional Relations to get closer to the presidents of the Senate and the Chamber. At the opening of the 29th International Construction and Architecture Fair, held in April 2025, Lula referred disparagingly to the managing director of the International Monetary Fund, Kristalina Georgieva, calling her "a little woman".
=== Duchenne muscular dystrophy === Several morpholino oligos have been approved to treat specific groups of mutations causing Duchenne muscular dystrophy. In September 2016, eteplirsen (ExonDys51) received FDA approval for the treatment of cases that can benefit from skipping exon 51 of the dystrophin transcript. In December 2019, golodirsen (Vyondys 53) received FDA approval for the treatment of cases that can benefit from skipping exon 53 of the dystrophin transcript. In August 2020, viltolarsen (Viltepso) received FDA approval for the treatment of cases that can benefit from skipping exon 53 of the dystrophin transcript.
Sources: en.wikipedia.org
Having succumbed to dementia prior to the elevation of Hanover, it is unlikely that he ever understood that he had gained an additional kingship, and he took no role in its governance. Functional administration of Hanover was usually handled by a viceroy, which during the later years of George III's reign and the reigns of Kings George IV and William IV from 1816 to 1837, was Adolph Frederick, George III's youngest surviving son. When Queen Victoria succeeded to the British throne in 1837, the 123-year personal union of Great Britain and Hanover ended. Unlike in Britain, semi-Salic law operated in Hanover, prohibiting the accession to the throne by a female if any male of the dynasty had survived. Ernest Augustus, now the eldest surviving son of George III, succeeded to the throne as King of Hanover. Adolph Frederick, the younger brother and long-time Viceroy, returned to Britain. Ernest Augustus had a personally strained relationship with his niece Queen Victoria, and they frequently squabbled over family affairs. Domestically, his reign began with a constitutional crisis as he tried to suspend parliament and nullify the written constitution of 1819. He also presided over the country during the turbulent Revolutions of 1848. His son, George V, assumed the throne in 1851.
=== Antibiotic function === The β-lactam family of antibiotic molecules consists of four groups: penicillins, cephalosporins, carbapenems (such as imipenem, ertapenem, meropenem and doripenem) and monobactams. These antibiotics share common structure and mechanism of action. They enter the periplasmic space through porins, where they then inhibit transpeptidases (which are also known as penicillin-binding proteins (PBPs)), enzymes that facilitate peptide cross-links during cell wall synthesis. Their binding to the PBP active site is facilitated in part by their common structure, which is similar to that of D-alanyl-D-alanine. D-Alanyl-D-alanine is a residue on the NAM peptide subunit involved in building peptidoglycan. Carbapenem covalently binds to PBPs, which causes transpeptidases to irreversibly lose their catalytic activity. Inhibition of transpeptidases prevents the formation of cross-links between peptidoglycan polymers and causes a build-up of peptidoglycan precursors. Newly formed peptidoglycan is weakened from the absence of cross-linkages. The continued activity of autolysins, that function like lysozymes and cleave glycosidic and peptide bonds of peptidoglycan in periplasm, weakens the cell wall and leads to osmotic bursting of the bacterial cell. One notable property of carbapenems is their resistance to hydrolysis by bacterial plasmid and chromosomally mediated extended-spectrum β-lactamases (ESBL).
== Genes == The MHC locus is present in all jawed vertebrates; it is assumed to have arisen about 450 million years ago. Despite the difference in the number of genes included in the MHC of different species, the overall organization of the locus is rather similar. Usual MHC contains about a hundred genes and pseudogenes, not all of which are involved in immunity. In humans, the MHC region occurs on chromosome 6, between the flanking genetic markers MOG and COL11A2 (from 6p22.1 to 6p21.3 about 29Mb to 33Mb on the hg38 assembly), and contains 224 genes spanning 3.6 megabase pairs (3 600 000 bases). About half have known immune functions. The human MHC is also called the HLA (human leukocyte antigen) complex (often just the HLA). Similarly, there is SLA (Swine leukocyte antigens), BoLA (Bovine leukocyte antigens), DLA for dogs, etc. However, historically, the MHC in mice is called the Histocompatibility system 2 or just the H-2, whereas it has been referred to as the RT1 complex in rats, and the B locus in chickens. The MHC gene family is divided into three subgroups: MHC class I, MHC class II, and MHC class III. Among all those genes present in MHC, there are two types of genes coding for the proteins MHC class I molecules and MHC class II molecules that are directly involved in the antigen presentation. These genes are highly polymorphic, 19031 alleles of class I HLA, and 7183 of class II HLA are deposited for human in the IMGT database.
In some cultures, breasts play a role in human sexual activity. Breasts and especially the nipples are among the various human erogenous zones. They are sensitive to the touch as they have many nerve endings; and it is common to press or massage them with hands or orally before or during sexual activity. During sexual arousal, breast size increases, venous patterns across the breasts become more visible, and nipples harden. Compared to other primates, human breasts are proportionately large throughout adult females' lives. Some writers have suggested that they may have evolved as a visual signal of sexual maturity and fertility. In Patterns of Sexual Behavior, a 1951 analysis of 191 traditional cultures, the researchers noted that stimulation of the female breast by a male sexual partner "seemed absent in all subhuman forms, although it is common among the members of many different human societies." Many people regard bare female breasts to be aesthetically pleasing or erotic, and they can elicit heightened sexual desires in men in many cultures. In the ancient Indian work the Kama Sutra, light scratching of the breasts with nails and biting with teeth are considered erotic. Some people show a sexual interest in female breasts distinct from that of the person, which may be regarded as a breast fetish. A number of Western fashions include clothing which accentuate the breasts, such as the use of push-up bras and decollete (plunging neckline) gowns and blouses which show cleavage. While U.S.
In 2016, General Electric announced a sCO2-based turbine that enabled a 50% efficiency of converting heat energy to electrical energy. In it the CO2 is heated to 700 °C. It requires less compression and allows heat transfer. It reaches full power in 2 minutes, whereas steam turbines need at least 30 minutes. The prototype generated 10 MW and is approximately 10% the size of a comparable steam turbine. The 10 MW US$155-million Supercritical Transformational Electric Power (STEP) pilot plant was completed in 2023 in San Antonio. It is the size of a desk and can power around 10,000 homes. In 2025, The Nuclear Power Institute of China (NPIC) of the China National Nuclear Corporation (CNNC) and its partners have commissioned the world's first commercial supercritical CO2 system - Chaotan One - with a capacity of 2 x 15 MW, utilizing waste heat from a steel factory in Liupanshui, Guizhou Province.
Sources: en.wikipedia.org
The names are often used interchangeably in casual writing, but they are not strictly identical. Modified GRF(1-29) refers to the unconjugated analogue carrying only the four substitutions. The version sold as CJC-1295 with DAC includes the albumin binding linker and clears much more slowly.
DAC stands for drug affinity complex, a term describing the maleimidopropionic acid linker. This group forms a covalent bond with the cysteine residue on serum albumin after administration. The resulting adduct is what extends the circulating half life from minutes to days.
No. It is entirely synthetic and does not correspond to any known endogenous peptide. The design starts from human growth hormone releasing hormone and introduces deliberate substitutions. Any biological effect comes from mimicking the natural hormone at its receptor.
Cool, dark, and dry conditions are standard, with storage at minus twenty degrees Celsius or below. Desiccant and sealed vials limit moisture uptake. Repeated warming and cooling of the container is generally avoided.