cjc-1295 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 2025-11-09. Where a claim depends on a specific study, the study is described rather than over-claimed.
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.
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 |
|---|---|---|
| Duration with linker | Several days | Reported in early human work |
| Duration without linker | Tens of minutes | Short plasma residence |
| Albumin attachment site | Cysteine-34 | Covalent maleimide reaction |
| Primary receptor | Pituitary GHRH receptor | Stimulates growth hormone release |
| Downstream marker | Insulin-like growth factor 1 | Indirect measure of activity |
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.
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.
The second form adds a maleimide-bearing linker to the lysine at the carboxyl end. This group reacts with cysteine-34 on circulating serum albumin, forming a covalent bond that keeps the peptide in the bloodstream for far longer. ConjuChem developed the molecule as a way to extend the action of a peptide without frequent administration. The albumin attachment is the defining structural feature of the drug affinity complex version. Whether continuous exposure produces effects distinct from shorter pulses remains an unresolved research question.
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.
Verification matters because research peptides vary widely in quality. A certificate of analysis is only as reliable as the method behind it, and a single chromatographic trace reveals little about counter-ions, residual solvents, or water content. Independent laboratories commonly pair mass confirmation with chromatographic purity and, where relevant, quantify water along with acetate or trifluoroacetate content. Reported purity figures are not standardized across suppliers, so a stated value such as ninety-eight percent is not directly comparable unless the analytical method, column, and detection wavelength accompany it.
Characterization of this peptide relies on a small set of routine techniques. Reversed-phase high-performance liquid chromatography separates the target from truncated or oxidized by-products and yields a purity estimate when paired with ultraviolet detection near 214 nanometers. Mass spectrometry, either electrospray coupled to liquid chromatography or matrix-assisted laser desorption, confirms that the observed mass matches the value calculated for the expected sequence. Amino acid analysis, and enzymatic digestion followed by fragment mapping, are used when the sequence itself rather than the mass requires verification.
=== Bicycles === In 2008, UPS started hiring bicycle delivery personnel in Vancouver, Washington, and in several cities in Oregon (Portland, Salem, Corvallis, Eugene, and Medford). In fall of 2018, UPS announced a new program in Seattle, Washington using pedal-assist electric cargo bikes (made by Portland-based Truck Trike) around Pike Place and other congested downtown areas. In Amsterdam UPS also uses Urban Arrow delivery bicycles for delivery via a granted concession.
Muslims, India's largest religious minority, have contributed significantly to a synthetic Indo-Islamic religious culture. Sufism, the heterodox mystical movement in Islam found receptiveness among adherents of the medieval regional Shaivite and Vaishnavite traditions of Bhakti. Sikh gurdwaras and Sufi dargahs often attract both visitors and worshippers from other religions. India has monastic traditions such as that of Jain ascetics some of whom practice an extreme form of nonviolence (ahimsa) and Buddhist communities that have preserved ancient styles of meditations. This religious diversity coexists with religious endogamy—people rarely marry outside their faith. There is also religious segregation in housing—religious groups cluster by choice or necessity. Thus, India's religious picture has both rich intermixing and clear divisions.
== History == Much of the preparatory work that led into the adoption of RM-ODP as an ISO standard was carried out by the Advanced Networked Systems Architecture (ANSA) project. This ran from 1984 until 1998 under the leadership of Andrew Herbert (now MD of Microsoft Research in Cambridge), and involved a number of major computing and telecommunication companies. Parts 2 and 3 of the RM-ODP were eventually adopted as ISO standards in 1996. Parts 1 and 4 were adopted in 1998.
=== Split and pool synthesis in solution === Han et al. described a method that made it possible to keep the advantages of both the high efficiency of S&P synthesis and that of a homogeneous media in the chemical reactions. In their method polyethyleneglycol (PEG) was used as soluble support in S&P synthesis of peptide libraries. MeO-CH2-CH2-O-(CH2-CH2-O)n-CH2-CH2-OH PEG proved suitable for this purpose since it is soluble in a wide variety of aqueous and organic solvents and its solubility provides homogeneous reaction conditions even when the attached molecule itself is insoluble in the reaction medium. Separation from the solution of the polymer and the synthesized compounds bound to it can be achieved by precipitation and filtration. The precipitation requires concentrating the reaction solutions then diluting with diethyl ether or tert-butyl methyl ether. Under carefully controlled precipitation conditions the polymer with the bound products precipitates in crystalline form and the unwanted reagents remain in solution. In the solid phase, S&P synthesis a single compound forms on each bead, and as a consequence, the number of compounds can't exceed the number of beads. So, the theoretical maximum number of compounds depends on the quantity of the solid support and the size of the beads. On 1 g polystyrene resin, for example, a maximum of 2 million compounds can be synthesized if the diameter of the resin beads is 90 μm, and 2 billion can be made if the bead size is 10 μm.
Sources: en.wikipedia.org
Flucytosine: The toxicity of flucytosine is increased and allows for a lower dose of amphotericin B. Amphotericin B may also facilitate entry of flucytosine into the fungal cell by interfering with the permeability of the fungal cell membrane. Diuretics or cisplatin: Increased renal toxicity and increased risk of hypokalemia Corticosteroids: Increased risk of hypokalemia Imidazole antifungals: Amphotericin B may antagonize the activity of ketoconazole and miconazole. The clinical significance of this interaction is unknown. Neuromuscular-blocking agents: Amphotericin B–induced hypokalemia may potentiate the effects of certain paralytic agents. Foscarnet, ganciclovir, tenofovir, adefovir: The risk of hematological and kidney side effects of amphotericin B is increased Zidovudine: Increased the risk of kidney and hematological toxicity. Other nephrotoxic drugs (such as aminoglycosides): Increased risk of serious renal damage Cytostatic drugs: Increased risk of kidney damage, low blood pressure, and airway spasms Transfusion of leukocytes: There is a risk that pulmonary (lung) damage may occur. Space the intervals between the application of amphotericin B and the transfusion, and monitor pulmonary function
Long-term depression enacts mechanisms to decrease AMPA receptor density in selected dendritic spines, dependent on clathrin and calcineurin and distinct from that of constitutive AMPAR trafficking. The starting signal for AMPAR endocytosis is an NMDAR-dependent calcium influx from low-frequency stimulation, which in turn activates protein phosphatases PP1 and calcineurin. However, AMPAR endocytosis has also been activated by voltage-dependent calcium channels, agonism of AMPA receptors, and administration of insulin, suggesting general calcium influx as the cause of AMPAR endocytosis. Blockage of PP1 did not prevent AMPAR endocytosis, but antagonist application to calcineurin led to significant inhibition of this process. Calcineurin interacts with an endocytotic complex at the postsynaptic zone, explaining its effects on LTD. The complex, consisting of a clathrin-coated pit underneath a section of AMPAR-containing plasma membrane and interacting proteins, is the direct mechanism for reduction of AMPARs, in particular GluR2/GluR3 subunit-containing receptors, in the synapse. Interactions from calcineurin activate dynamin GTPase activity, allowing the clathrin pit to excise itself from the cell membrane and become a cytoplasmic vesicle. Once the clathrin coat detaches, other proteins can interact directly with the AMPARs using PDZ carboxyl tail domains; for example, glutamate receptor-interacting protein 1 (GRIP1) has been implicated in intracellular sequestration of AMPARs.
The 1988 US presidential elections lent new urgency to the negotiations, which had recently stalled after six consecutive rounds of talks in Brazzaville. Angola and Cuba had gambled heavily on a victory for Michael Dukakis and the Democratic Party during the US elections, hoping that this would spell the end of US aid to UNITA and a harder line on South Africa. At the time of the Geneva Protocol, dos Santos had commented that "if the Democrats had won the elections, there would be a readjustment in US policy, particularly on Southern Africa". The election of Republican candidate George H. W. Bush had the effect of persuading the Angolan and Cuban delegations to be more flexible. Crocker reiterated on several occasions that a new US administration meant changes in personnel and basic policy review, and pressed them not to waste months of effort. Three days after the US election results were released, the parties reconvened in Geneva and within the week had agreed to a phased Cuban withdrawal over the course of twenty seven months. In exchange, South Africa pledged to begin bestowing independence on South West Africa by 1 November 1989. On 13 December 1988, South Africa, Angola, and Cuba signed the Brazzaville Protocol, which affirmed their commitment to these conditions and set up a Joint Military Monitoring Commission (JMMC) to supervise the disengagement in Angola. The JMMC was to include Soviet and US observers. All hostilities between the belligerents, including PLAN, were to formally cease by 1 April 1989.
The hot water supply hose of the umbilical is commonly 1⁄2 inch (13 mm) bore, and is connected to a supply manifold at the right hip of the suit with a set of valves which allow the diver to control flow to the front and back of the torso, and to the arms and legs, and to dump the supply to the environment if the water is too hot or too cold. The manifold distributes the water through the suit through perforated tubes. The hot-water suit is normally a one-piece neoprene wetsuit, fairly loose fitting, to fit over a neoprene undersuit, which can protect the diver from scalding if the temperature control system fails, with a zipper on the front of the torso and on the lower part of each leg. Gloves and boots are worn which receive hot water from the ends of the arm and leg hoses. If a full-face mask is worn, the hood may be supplied by a tube at the neck of the suit. Helmets do not require heating. The heating water flows out at the neck and cuffs of the suit through the overlap with gloves, boots, or hood.
=== Acting === Shawn's involvement with theater began in 1970 when he met Andre Gregory, who has since directed several of his plays. As a stage actor, he has appeared mostly in his own plays and other projects with Gregory. He made his film debut in 1979, playing Diane Keaton's ex-husband in Woody Allen's Manhattan and an insurance agent in Bob Fosse's All That Jazz. His best-known film roles include Earl in Strange Invaders (1983) and Mr. Hall in Clueless (1995). After seeing his performance in My Dinner with Andre (1981), casting director Janet Hirshenson was so fond of his delivery of the word "inconceivable" that she cast him as Vizzini in The Princess Bride (1987), for whom the word is a catchphrase. Other roles include Baron Von Westphalen in Southland Tales, Cyrus Rose on Gossip Girl, Marty in Vegas Vacation (1997), and Ezra in The Haunted Mansion (2003).
Sources: en.wikipedia.org
On 17 September, at least 12 people were killed and more than 2,750 were wounded, including Hezbollah members and civilians, after the explosions of their pagers in Lebanon and Syria, including in Beirut. The attack resulted in 1,500 fighters being taken out of action, with many facing blindness or losing their hands. Among those injured was the Iranian ambassador, Mojtaba Amani. Several drones launched from Lebanon crossed the border. Hezbollah confirmed the death of 12 militants on that day. Also on 17 September, the Shin Bet claimed that it thwarted a Hezbollah attempt for assassinate a former senior defence official with a Claymore mine. On 18 September another series of explosions involving wireless devices was reported across Lebanon, killing at least 30 people and injuring 750 others. Hezbollah said that it carried out four strikes targeting IDF sites including in Neve Ziv and Beit Hillel with rockets and artillery. Lebanese media reported that Israeli strikes struck Al-Jbeen, Shama, Majdal Zoun, Kfar Kila, Kfar Shiuba, Houla, al-Taybeh, the forest in the vicinity of Kounine and Beit Yahoun, and the outskirts of Yater. The IDF said that it struck Hezbollah sites in Chihine, Tayibe, Blida, Meiss El Jabal, Aitaroun and Kfarkela and a Hezbollah weapons depot in Khiam in these airstrikes. On 19 September, the IDF said that it started carrying out airstrikes against Hezbollah to destroy its capabilities in southern Lebanon while heavy bombing was reported in Deir Qanoun En Nahr.
Enzymes incur catalysis by binding more strongly to transition states than substrates and products. At the catalytic binding site, several different interactions may act upon the substrate. These range from electric catalysis, acid and base catalysis, covalent catalysis, and metal ion catalysis. These interactions decrease the activation energy of a chemical reaction by providing favorable interactions to stabilize the high energy molecule. Enzyme binding allows for closer proximity and exclusion of substances irrelevant to the reaction. Side reactions are also discouraged by this specific binding. Types of enzymes that can perform these actions include oxidoreductases, transferases, hydrolases, lyases, isomerases, and ligases. For instance, the transferase hexokinase catalyzes the phosphorylation of glucose to make glucose-6-phosphate. Active site residues of hexokinase allow for stabilization of the glucose molecule in the active site and spur the onset of an alternative pathway of favorable interactions, decreasing the activation energy.
At 3%, calcium is the fifth most abundant element in the Earth's crust, and the third most abundant metal behind aluminium and iron. It is also the fourth most abundant element in the lunar highlands. Sedimentary calcium carbonate deposits pervade the Earth's surface as fossilised remains of past marine life; they occur in two forms, the rhombohedral calcite (more common) and the orthorhombic aragonite (forming in more temperate seas). Minerals of the first type include limestone, dolomite, marble, chalk, and Iceland spar; aragonite beds make up the Bahamas, the Florida Keys, and the Red Sea basins. Corals, sea shells, and pearls are mostly made up of calcium carbonate. Among the other important minerals of calcium are gypsum (CaSO4·2H2O), anhydrite (CaSO4), fluorite (CaF2), and apatite ([Ca5(PO4)3X], X = OH, Cl, or F) The major producers of calcium are China (about 10000 to 12000 tonnes per year), Russia (about 6000 to 8000 tonnes per year), and the United States (about 2000 to 4000 tonnes per year). Canada and France are among the minor producers. In 2005, about 24000 tonnes of calcium were produced; about half of the world's extracted calcium is used by the United States, with about 80% of the output used each year. In Russia and China, Davy's method of electrolysis is still used, but is instead applied to molten calcium chloride. Since calcium is less reactive than strontium or barium, the oxide–nitride coating that results in air is stable and lathe machining and other standard metallurgical techniques are suitable for calcium. In the U.S.
== Contraindications == Under the US approval, ertugliflozin is contraindicated for people with severe kidney failure, end-stage renal disease, and dialysis. The European Union approval does not list any contraindications apart from hypersensitivity to the drug, which is standard for all drug approvals.
In 1947, the United Gold Coast Convention led by "The Big Six" called for "self-government within the shortest possible time." Following the 1946 Gold Coast legislative election, Kwame Nkrumah, a Ghanaian nationalist who led Ghana from 1957 to 1966 as the country's first prime minister and president, formed the Convention People's Party in 1949 with the motto "self-government now". The party initiated a "positive action" campaign involving non-violent protests, strikes and non-cooperation with the British authorities. Nkrumah was arrested and sentenced to one year imprisonment during this time. In the Gold Coast's 1951 general election, he was elected to Parliament and was released from prison. At midnight on 6 March 1957, the Gold Coast, Ashanti, the Northern Territories, and British Togoland were unified as one single independent dominion within the British Commonwealth under the name Ghana. This was done under the Ghana Independence Act 1957. The flag of Ghana, consisting of the colours red, gold, green, and a black star, dates back to this unification. On 1 July 1960, following the Ghanaian constitutional referendum and Ghanaian presidential election, Nkrumah declared Ghana a republic and assumed the presidency. The nation's Independence Day is 6 March, and 1 July is celebrated as Republic Day. Nkrumah led an authoritarian regime in Ghana, repressing political opposition and conducting elections that were not free and fair. In 1964, a constitutional amendment made Ghana a one-party state, with Nkrumah as president for life of the nation and its party.
Sources: en.wikipedia.org
A maleimide moiety reacts with the thiol of cysteine-34, forming a covalent bond. The reaction occurs in circulation without enzymatic catalysis.
The group is intended to alter distribution and persistence, not receptor engagement. The peptide portion still binds the pituitary receptor, so the primary difference is duration rather than potency.
Not firmly. Early reports describe several days for the extended form, but independent confirmations are sparse, and values vary with assay method and study design.
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.