DAC 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.
Updated 2025-09-06. Numbers and descriptions here follow the published literature rather than marketing material.
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.
At the pituitary, the peptide binds the growth hormone-releasing hormone receptor on somatotroph cells. Receptor activation raises intracellular cyclic AMP and triggers release of stored growth hormone. Somatostatin and other hypothalamic signals modulate this response. Negative feedback from insulin-like growth factor 1 also influences output. The same regulatory architecture operates with the native hormone. Whether the synthetic analog alters feedback dynamics over repeated exposure remains an open question. Most published receptor work uses cell models rather than intact human systems.
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.
| 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 |
Clearance profiles diverge sharply between the two versions. The albumin-binding molecule stays in plasma for several days, whereas the unmodified analog is largely gone within about half an hour in reported work. Cleavage by dipeptidyl peptidase IV is a major contributor to the short life of the unmodified sequence. These gaps mean the two versions cannot be substituted for each other in study design or in reading results side by side.
Reports on this compound commonly follow serum growth hormone and insulin-like growth factor 1 across defined time windows. Protocols differ in sampling frequency, assay platform, and participant characteristics, which makes direct comparison between publications difficult. Some work focuses on pulsatile release patterns instead of average concentrations. Whether repeated exposure alters endogenous hormone rhythms over long periods remains an open question, and the formal literature is thinner than the volume of informal commentary implies.
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.
Lyophilised powder is the usual supplied form. The material is hygroscopic, so vials are typically equilibrated to room temperature before opening in order to prevent condensation on the contents. Long-term storage is generally described at minus twenty degrees Celsius or colder, protected from light and moisture. Repeated freeze-thaw cycles are avoided because they promote aggregation and loss of soluble material. A reconstituted solution is considerably less stable than the dry powder and is normally kept refrigerated for short periods only.
Identity and purity are assessed mainly by reversed-phase high-performance liquid chromatography combined with mass spectrometry. The chromatographic separation resolves the target peptide from truncation products and from species carrying oxidised residues, while mass measurement confirms the expected molecular mass. Because the two common variants differ by roughly 280 daltons, a mass determination distinguishes them unambiguously. Purity is often quoted as a percentage of total peak area, although that figure depends on the detection wavelength and the integration method applied.
Reported half-lives differ widely between the two variants and between species. Values for the albumin-binding form are usually expressed in days, while the unconjugated form is measured in minutes to a few hours. Sampling schedules, assay sensitivity, and route of administration all influence the numbers, which limits direct comparison across studies. Whether sustained receptor occupancy produces different downstream effects from pulsatile stimulation remains an open question in the published work. Claims about relative potency should therefore be read alongside the specific study design that produced them.
Maggot therapy has been shown to accelerate debridement of necrotic wounds and reduce the bacterial load of the wound, leading to earlier healing, reduced wound odor and less pain. The combination and interactions of these actions make maggots an extremely potent tool in chronic wound care. Negative pressure wound therapy (NPWT) is a treatment that improves ischemic tissues and removes wound fluid used by bacteria. This therapy, also known as vacuum-assisted closure, reduces swelling in tissues, which brings more blood and nutrients to the area, as does the negative pressure itself. The treatment also decompresses tissues and alters the shape of cells, causes them to express different mRNAs and to proliferate and produce ECM molecules. Recent technological advancements produced novel approaches such as self-adaptive wound dressings that rely on properties of smart polymers sensitive to changes in humidity levels. The dressing delivers absorption or hydration as needed over each independent wound area and aids in the natural process of autolytic debridement. It effectively removes liquefied slough and necrotic tissue, disintegrated bacterial biofilm as well as harmful exudate components, known to slow the healing process. The treatment also reduces bacterial load by effective evacuation and immobilization of microorganisms from the wound bed, and subsequent chemical binding of available water that is necessary for their replication.
== Uses and toxicity == As with all Euphorbiaceae species, when broken or cut, the tissue of Euphorbia caducifolia bleeds a profuse white, latex-like, phorbol-containing sap (among other alkaloids) which may be particularly painful if contact is made with mucous membranes—such as in the eyes, mouth or nose, or if it drips into a fresh cut. If sap dries on one's bare hands and it is not promptly washed off, care must be taken not to touch the eyes or mouth. Accidental ingestion of the plant can produce untold gastrointestinal effects. However, despite its irritating and potentially poisonous qualities, it has long been used in Pakistan as an anti-tumour agent, and the roots are also said to have similar anti-tumour properties. Interestingly, the plant's latex has also been used to promote the healing of wounds, and research has shown that it does indeed exhibit significant wound healing activity, likely due to the hardening of the latex sap as it dries when exposed to air. The plant is also a rich source of hydrocarbons (C-15 compounds) that can be processed to produce a biodiesel fuel.
Following this, the European Green Party presented the European Parliament copies of contracts signed by two European companies and representatives of the President of Somalia, to accept 10 million tonnes of toxic waste for $80 million. According to reports by the United Nations Environment Programme (UNEP), the waste resulted in abnormally high cases of respiratory infections, mouth ulcers, mouth bleeding, abdominal haemorrhages and unusual skin infections among the inhabitants of and around the northeastern towns of Hobyo and Benadir. These diseases were consistent with radiation sickness. UNEP adds that the situation posed a very serious environmental hazard to Somalia and the broader eastern Africa sub-region.
=== Treatment === Due to their agitated behavior and confused mental state, people with acute Datura poisoning or intoxication are typically hospitalized. Gastric lavage and the administration of activated charcoal can be used to reduce the stomach's absorption of the ingested material, and the drug physostigmine is used to reverse the effect of the poisons. Benzodiazepines can be given to calm the patient's agitation, and supportive care with oxygen, hydration and symptomatic treatment is often provided. Observation of the patient is indicated until the symptoms resolve, usually from 24 to 36 hours after ingestion of the Datura.
=== Admission to hospital === Patients with AN may be deemed to have a lack of insight regarding the necessity of treatment, and thus may be involuntarily treated without their consent. AN has a high mortality and patients admitted in a severely ill state to medical units are at particularly high risk. Diagnosis can be challenging, risk assessment may not be performed accurately, consent and the need for compulsion may not be assessed appropriately, refeeding syndrome may be missed or poorly treated and the behavioural and family problems in AN may be missed or poorly managed. Guidelines published by the Royal College of Psychiatrists recommend that medical and psychiatric experts work together in managing severely ill people with AN.
Sources: en.wikipedia.org
== Hospitals == People's Hospital of Ningxia Hospital of Traditional Chinese Medicine of Ningxia Ningxia Medical College Affiliated Hospital Yinchuan Hospital of Traditional Chinese Medicine Yinchuan People's Hospital Yinchuan Stomatological Hospital Yinchuan Women and Children's Healthcare Center Women and Children's Healthcare Center of Ningixa Yinchuan No.1 People's Hospital Yinchuan No.2 People's Hospital Yinchuan No.3 People's Hospital Shizuishan No.2 People's Hospital Guyuan Hospital of Ningxia
β-carotene can be extracted from fungus Blakeslea trispora, marine algae Dunaliella salina or genetically modified yeast Saccharomyces cerevisiae, starting with xylose as a substrate. Chemical synthesis uses either a method developed by BASF or a Grignard reaction utilized by Hoffman-La Roche. The world market for synthetic retinol is primarily for animal feed, leaving approximately 13% for a combination of food, prescription medication and dietary supplement use. Industrial methods for the production of retinol rely on chemical synthesis. The first industrialized synthesis of retinol was achieved by the company Hoffmann-La Roche in 1947. In the following decades, eight other companies developed their own processes. β-ionone, synthesized from acetone, is the essential starting point for all industrial syntheses. Each process involves elongating the unsaturated carbon chain. Pure retinol is extremely sensitive to oxidization and is prepared and transported at low temperatures and oxygen-free atmospheres. When prepared as a dietary supplement or food additive, retinol is stabilized as the ester derivatives retinyl acetate or retinyl palmitate. Prior to 1999, three companies, Roche, BASF and Rhone-Poulenc controlled 96% of global vitamin A sales. In 2001, the European Commission imposed total fines of 855.22 million euros on these and five other companies for their participation in eight distinct market-sharing and price-fixing cartels that dated back to 1989. Roche sold its vitamin division to DSM in 2003. DSM and BASF have the major share of industrial production.
Within months of the collapse of the Third Coalition, the Fourth Coalition (1806–1807) against France was formed by Britain, Prussia, Russia, Saxony, and Sweden. In July 1806, Napoleon formed the Confederation of the Rhine out of the many small German states which constituted the Rhineland and most other western parts of Germany. He amalgamated many of the smaller states into larger electorates, duchies, and kingdoms to make the governance of non-Prussian Germany smoother. Napoleon elevated the rulers of the two largest Confederation states, Saxony and Bavaria, to the status of kings. In August 1806, the Prussian king, Frederick William III, decided to go to war independently of any other great power. The army of Russia, a Prussian ally, in particular, was too far away to assist. On 8 October 1806, Napoleon unleashed all the French forces east of the Rhine into Prussia. Napoleon defeated a Prussian army at Jena (14 October 1806), and Davout defeated another at Auerstädt on the same day. 160,000 French soldiers (increasing in number as the campaign went on) attacked Prussia, moving with such speed that they destroyed the entire Prussian Army as an effective military force. Out of 250,000 troops, the Prussians sustained 25,000 casualties, lost a further 150,000 as prisoners, 4,000 artillery pieces, and over 100,000 muskets. At Jena, Napoleon had fought only a detachment of the Prussian force. The battle at Auerstädt involved a single French corps defeating the bulk of the Prussian army. Napoleon entered Berlin on 27 October 1806.
=== Pregnancy === More than 75% of women with rheumatoid arthritis have symptoms that improve during pregnancy, but their symptoms worsen after delivery. Methotrexate and leflunomide are teratogenic (harmful to the fetus) and not used in pregnancy. It is recommended that women of childbearing age use contraceptives to avoid pregnancy and discontinue their use if pregnancy is planned. Low doses of prednisolone, hydroxychloroquine, and sulfasalazine are considered safe in pregnant women with rheumatoid arthritis. Prednisolone should be used with caution as the side effects include infections and fractures.
Sources: en.wikipedia.org
=== Identification === Mushroom Observer, a collaborative mushroom recording and identification project An Aid to Mushroom Identification Archived 26 July 2009 at the Wayback Machine, Simon's Rock College Online Edible Wild Mushroom Field Guide
{\displaystyle {\boldsymbol {B}}=\lambda ^{2}~\mathbf {n} _{1}\otimes \mathbf {n} _{1}+\lambda ^{2}~\mathbf {n} _{2}\otimes \mathbf {n} _{2}+{\cfrac {1}{\lambda ^{4}}}~\mathbf {n} _{3}\otimes \mathbf {n} _{3}~.}
Muscazone is an amino acid derivative found in Amanita muscaria (fly agaric) mushrooms. It is a photodegradation product of ibotenic acid. The human psychoactivity of muscazone is unknown, but it is said to have weak activity in neurochemical tests. Muscazone was first described in the scientific literature by 1965. Other notable compounds found in Amanita muscaria include ibotenic acid, muscimol, and muscarine.
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.
A maleimide moiety reacts with the thiol of cysteine-34, forming a covalent bond. The reaction occurs in circulation without enzymatic catalysis.