If you have been reading about DAC 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.
Last reviewed on 2025-09-12. Where a claim depends on a specific study, the study is described rather than over-claimed.
CJC-1295 is a synthetic peptide belonging to the growth hormone-releasing hormone analog family. It comprises twenty-nine amino acid residues derived from the N-terminal region of natural GHRH. The molecule incorporates several non-natural substitutions that increase resistance to enzymatic degradation. These modifications extend its activity compared with the native hormone fragment. Researchers use it to study pituitary growth hormone secretion in laboratory and clinical settings. This compound is distinct from native GHRH in its stability profile.
Two principal forms appear in the literature and in research supply. One carries a drug affinity complex, a maleimide-based group that forms a covalent bond with circulating albumin. This linkage slows clearance and produces a long-lasting elevation of peptide levels. The other form lacks that group and is often labeled MOD GRF(1-29). It has a much shorter circulation time. Both variants retain the same core receptor-binding sequence. Reported half-lives differ substantially between the two.
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.
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.
| Property | Value | Notes |
|---|---|---|
| Molecular weight, DAC form | About 3647 Da | Varies with salt form |
| Molecular weight, non-DAC form | About 3358 Da | MOD GRF(1-29) |
| Solubility class | Water soluble | Also dissolves in polar solvents |
| Reported half-life, DAC form | About five to eight days | Values from human studies |
| Common synonyms | CJC-1295; MOD GRF(1-29) | Name depends on variant |
Serotonin syndrome is typically caused by the use of two or more serotonergic drugs, including SSRIs. Serotonin syndrome is a condition that can range from mild (most common) to deadly. Mild symptoms may consist of increased heart rate, fever, shivering, sweating, dilated pupils, myoclonus (intermittent jerking or twitching), as well as hyperreflexia. Concomitant use of SSRIs or SNRIs for depression with a triptan for migraine does not appear to heighten the risk of the serotonin syndrome. Taking monoamine oxidase inhibitors (MAOIs) in combination with SSRIs can be fatal, since MAOIs disrupt monoamine oxidase, an enzyme which is needed to break down serotonin and other neurotransmitters. Without monoamine oxidase, the body is unable to eliminate excess neurotransmitters, allowing them to build up to dangerous levels. The prognosis for recovery in a hospital setting is generally good if serotonin syndrome is correctly identified. Treatment consists of discontinuing any serotonergic drugs and providing supportive care to manage agitation and hyperthermia, usually with benzodiazepines.
=== Feud with the House and Marcos-Duterte rift === A rift between the Duterte and Marcos families had begun under House Speaker Martin Romualdez' leadership. In the House of Representatives, unconfirmed reports of Deputy House Speaker Gloria-Macapagal Arroyo allegedly attempting to unseat Romualdez as House Speaker circulated. Despite Arroyo dismissing the accusations, Arroyo was later demoted by the House from her senior deputy Speaker position. Duterte's daughter, Vice President and Education Secretary Sara, subsequently resigned from the Romualdez-led Lakas-CMD and, in a veiled reference to Romualdez, called him a "tambaloslos" (A term that can be interpreted as a joke or as an insult, depending on context). In October 2023, Sara requested Congress for the allocation of confidential funds for the office of the vice president (OVP) and the education department which can be used for the Reserve Officers' Training Corps program. Her requests came under intense scrutiny by the Senate and the House, which was dominated by Romualdez's allies. Congress ultimately rejected her appeals while swiftly approving the confidential funds of the Office of the President; Sara eventually dropped her requests, reasoning that the move was being "divisive". In the aftermath of events, Duterte criticized the House for denying his daughter's confidential funds; alleging a collusion between Romualdez and the left-wing Makabayan bloc, he demanded an audit of the House under Romualdez.
=== Malicious contributions on Wikipedia === In September 2011, Hari admitted that he had edited articles on Wikipedia about himself and journalists with whom he had had disputes. Using a sock puppet account under the name "David r from meth productions", he added false and defamatory claims to articles about journalists including Nick Cohen, Cristina Odone, Francis Wheen, Andrew Roberts, Niall Ferguson and Oliver Kamm, and edited the article about himself "to make him seem one of the essential writers of our times". In July 2011, Cohen wrote about the suspicious Wikipedia editing in The Spectator, prompting the New Statesman journalist David Allen Green to compile evidence that Hari used the identity "David Rose" to pretend to be an editor who was qualified in environmental science. This led to an investigation by the Wikipedia community and "David Rose" was blocked from Wikipedia. Hari published an apology in The Independent, admitting that he had been "David Rose" and writing: "I edited the entries of people I had clashed with in ways that were juvenile or malicious: I called one of them anti-Semitic and homophobic, and the other a drunk. I am mortified to have done this, because it breaches the most basic ethical rule: don't do to others what you don't want them to do to you. I apologise to the latter group unreservedly and totally."
Sources: en.wikipedia.org
Rheumatology (from Ancient Greek ῥεῦμα (rheûma) 'flowing current') is a branch of medicine devoted to the diagnosis and management of disorders of which the common feature is inflammation in the bones, muscles, joints, and internal organs. Rheumatology covers more than 100 different complex diseases, collectively known as rheumatic diseases, such as arthritis, lupus, and Sjögren's syndrome. Doctors who have undergone formal training in rheumatology are called rheumatologists. Because many of these diseases are now known to be disorders of the immune system, rheumatology has significant overlap with immunology, the branch of medicine that studies the immune system.
doi:10.1038/s41443-022-00636-7. PMID 36307732. Rushton, J.Philippe; Bogaert, Anthony F (1987). "Race differences in sexual behavior: Testing an evolutionary hypothesis". Journal of Research in Personality. 21 (4): 529–51. doi:10.1016/0092-6566(87)90038-9. Sutherland, Ronald S; Kogan, Barry A; Baskin, Laurence S; Mevorach, Robert A; Conte, Felix; Kaplan, Selna L; Grumbach, Melvin M (1996). "The Effect of Prepubertal Androgen Exposure on Adult Penile Length". The Journal of Urology. 156 (2): 783–7, discussion 787. doi:10.1016/S0022-5347(01)65814-2. PMID 8683783.
Many of the former Varian employees now honor Russell Varian's legacy of innovation by funding the Varian Young Investigator Award that recognizes early career investigators in NMR that make significant advancements in instrument development.
Sources: en.wikipedia.org
This was followed by the Triassic–Jurassic extinction event (about 201 million years ago), that saw the end of most of the other groups of early archosaurs, like aetosaurs, ornithosuchids, phytosaurs, and rauisuchians. Rhynchosaurs and dicynodonts survived (at least in some areas) at least as late as early –mid Norian and late Norian or earliest Rhaetian stages, respectively, and the exact date of their extinction is uncertain. These losses left behind a land fauna of crocodylomorphs, dinosaurs, mammals, pterosaurians, and turtles. The first few lines of early dinosaurs diversified through the Carnian and Norian stages of the Triassic, possibly by occupying the niches of the groups that became extinct. Also notably, there was a heightened rate of extinction during the Carnian pluvial event.
In Wolverine and the X-Men and the English dub of the Wolverine anime series, Logan was voiced by Steven Blum, who has voiced the characters across more animated films, series, and video games than any other voice actor. Wolverine has appeared in a variety of Marvel and X-Men video games, and has been the titular lead in six games: Wolverine (1991), Wolverine: Adamantium Rage (1994), X-Men: Wolverine's Rage (2001), the X2 tie-in X2: Wolverine's Revenge (2003), X-Men Origins: Wolverine (2009), a tie-in to the film of the same name, and Marvel's Wolverine (2026), developed by Insomniac Games.
== Contraindications == Acute intermittent porphyria, hypersensitivity to any barbiturate, prior dependence on barbiturates, severe respiratory insufficiency (as with chronic obstructive pulmonary disease), severe liver failure, pregnancy, and breastfeeding are contraindications for phenobarbital use.
==== Backwash effect ==== The backwash effect in breastfeeding refers to the process in which an infant's saliva flows back into the mother's breast during nursing. This backward flow may introduce the baby's saliva into the mammary gland, potentially prompting the mother's body to produce tailored immune responses in her breast milk to meet the infant's specific needs.
Sources: en.wikipedia.org
It is a synthetic peptide modeled on growth hormone-releasing hormone. The molecule is used in research on pituitary growth hormone secretion. It differs from the natural hormone through several stabilizing substitutions.
The DAC form carries a maleimide group that binds albumin and extends circulation time. The non-DAC form lacks this group and clears much faster. Both share the same receptor-binding core.
It targets the growth hormone-releasing hormone receptor on pituitary somatotroph cells. Activation raises cyclic AMP and promotes growth hormone release. Normal feedback pathways remain part of the response.
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.