MOD GRF(1-29) comes up often in conversation and rarely with the context attached. Here we lay out the basics in order, then work through the practical considerations.
Updated 2025-10-15. Numbers and descriptions here follow the published literature rather than marketing material.
The compound emerged from work at a Canadian biotechnology firm in the early 2000s. Early human studies examined its effect on growth hormone and insulin-like growth factor 1 in healthy volunteers and in people with HIV-associated fat redistribution. Reports described sustained increases in both markers after a single injection. Development did not advance to regulatory approval, and the clinical programme was later discontinued. The molecule is now encountered mainly as a research chemical rather than a marketed medicine.
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.
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.
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.
| Property | Value | Notes |
|---|---|---|
| Molecular formula | C152H252N44O42 | Cited for the form without the drug affinity complex |
| Molecular weight | About 3368 Da | Reported value for modified GRF(1-29) |
| Appearance | White to off-white powder | Lyophilised solid as usually supplied |
| Solubility | Soluble in water and polar solvents | Clarity depends on purity and salt content |
| Typical storage | -20 C or below, dry | Protect from light and repeated warming cycles |
Peptide degradation proceeds mainly through hydrolysis, oxidation of methionine, and deamidation of asparagine or glutamine residues. The maleimide group on the albumin-binding variant can also react with thiols or hydrolyze in aqueous media. Because these pathways accelerate with temperature and pH extremes, handling conditions strongly influence measured stability. Stability data in the public literature are limited and often generated under differing conditions, so general statements about shelf life should be read as approximate.
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.
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.
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.
He also established that the acid was readily soluble in cold ether and absolute alcohol, and unlike lichesterinic acid, could reduce potassium permanganate solution in the cold. Further work by Böhme in 1903 showed that the compound had a specific rotation of +29.3° and could decompose under reduced pressure (40mm) to form C18H32O3. Later work by Asano and Asahina established that natural protolichesterinic acid actually has a negative specific rotation ([α]D = −12.71°), indicating it is the (−)-(2S,3R) enantiomer, while the material studied by Zopf and Böhme was the (+)-(2R,3S) form.
In mid-2010, the Obama administration issued sanctions against the Government of Syria relating to charges of state-sponsored terrorism and weapons of mass destruction development. In November, Akram Elias flew to Damascus. He met with Bouthaina Shaaban, an aide to Bashar al-Assad, to assist the Syrian regime in developing a public relations strategy to repair Syria's damaged image in Washington. He was paid $22,000 a month for his services. At around the same time that Elias was working for the Syrians, Capital Communications Group maintained contracts with USAID, the Department of Justice, Department of State, Drug Enforcement Administration, and Department of Homeland Security, among other federal agencies. In 2010, USAID launched ZunZuneo, a social media network designed for Cuba. The intent of the right-wing USAID officials who hatched the scheme, according to documents uncovered by the Associated Press, was to create "smart mobs," that would overthrow the government of Cuba. The United States diplomatic cables leak occurred on Wikileaks around this time, and Collera Venta's cover was blown. Without being able to work in intelligence anymore, he left the State Security Unit to focus full time on his career as a cardiologist.
During embryonic development, migratory neural crest cells are generated by EMT involving the epithelial cells of the neuroectoderm. As a result, these cells dissociate from neural folds, gain motility, and disseminate to various parts of the embryo, where they differentiate to many other cell types. Also, craniofacial crest mesenchyme that forms the connective tissue forming the head and face, is formed by neural tube epithelium by EMT. EMT takes place during the construction of the vertebral column out of the extracellular matrix, which is to be synthesized by fibroblasts and osteoblasts that encircle the neural tube. The major source of these cells are sclerotome and somite mesenchyme as well as primitive streak. Mesenchymal morphology allows the cells to travel to specific targets in the embryo, where they differentiate and/or induce differentiation of other cells. During wound healing, keratinocytes at the border of the wound undergo EMT and undergo re-epithelialization or MET when the wound is closed. Snail2 expression at the migratory front influences this state, as its overexpression accelerates wound healing. Similarly, in each menstrual cycle, the ovarian surface epithelium undergoes EMT during post-ovulatory wound healing.
==== Inclusion of plasticizers ==== Inclusion of plasticizers tends to lower Tg and increase polymer flexibility. Addition of the plasticizer will also modify dependence of the glass-transition temperature Tg on the cooling rate. The mobility of the chain can further change if the molecules of plasticizer give rise to hydrogen bonding formation. Plasticizers are generally small molecules that are chemically similar to the polymer and create gaps between polymer chains for greater mobility and fewer interchain interactions. A good example of the action of plasticizers is related to polyvinylchlorides or PVCs. A uPVC, or unplasticized polyvinylchloride, is used for things such as pipes. A pipe has no plasticizers in it, because it needs to remain strong and heat-resistant. Plasticized PVC is used in clothing for a flexible quality. Plasticizers are also put in some types of cling film to make the polymer more flexible.
According to PROLADES, Belize's population was 64.6% Catholic, 27.8% Protestant, and 7.6% of other faiths in 1971. Until the late 1990s, Belize was a Catholic-majority country. Catholics formed 57% of the population in 1991, a share that dropped to 49% in 2000. The percentage of Catholics in the population has been decreasing in the past few decades due to the growth of Protestant churches, other religions and irreligiosity. In addition to Catholics, there has always been a large accompanying Protestant minority. It was brought by British, German, and other settlers to the British colony of British Honduras. From the beginning, it was largely Anglican and Mennonite in nature. The Protestant community in Belize experienced a large Pentecostal and Seventh-Day Adventist influx tied to the recent spread of various Evangelical Protestant denominations throughout Latin America and neighboring regions. Geographically speaking, German Mennonites live mostly in the rural districts of Cayo and Orange Walk. The Greek Orthodox Church has a presence in Santa Elena. The Association of Religion Data Archives estimates there were 7,776 Baháʼís in Belize in 2005, or 2.5% of the national population. Their estimates suggest this is the highest proportion of Baháʼís in any country. Their data also states that the Baháʼí Faith is the second most common religion in Belize, following Christianity. Hinduism is followed by most Indian immigrants.
Sources: en.wikipedia.org
Carpal Tunnel Syndrome Fact Sheet (National Institute of Neurological Disorders and Stroke) Archived 2016-03-03 at the Wayback Machine NHS website carpal-tunnel.net provides a free to use, validated, online self diagnosis questionnaire for CTS "Carpal Tunnel Syndrome". MedlinePlus. U.S. National Library of Medicine.
== S == Saegusa–Ito oxidation Sakurai reaction Salol reaction Sandheimer Sandmeyer diphenylurea isatin synthesis Sandmeyer isonitrosoacetanilide isatin synthesis Sandmeyer reaction Sanger reagent Saponification Sarett oxidation Schiemann reaction Schiff reaction Schiff test Schlenk equilibrium Schlosser modification Schlosser variant Schmidlin ketene synthesis Schmidt degradation Schmidt reaction Scholl reaction Schorigin Shorygin reaction, Shorygin reaction, Wanklyn reaction Schotten–Baumann reaction Seliwanoff's test Semidine rearrangement Semmler–Wolff reaction Seyferth–Gilbert homologation Shapiro reaction Sharpless asymmetric dihydroxylation Sharpless epoxidation Sharpless oxyamination or aminohydroxylation Shenck ene reaction Shi epoxidation Shiina esterification Shiina macrolactonization or Shiina lactonization Sigmatropic reaction Simmons–Smith reaction Simonini reaction Simonis chromone cyclization Simons process Skraup chinolin synthesis Skraup reaction Smiles rearrangement SNAr nucleophilic aromatic substitution SN1 SN2 SNi Solvolysis Sommelet reaction Sonn–Müller method Sonogashira coupling Sørensen formol titration Staedel–Rugheimer pyrazine synthesis Stahl oxidation Staudinger reaction Staudinger synthesis Steglich esterification Stephen aldehyde synthesis Stetter reaction Stevens rearrangement Stieglitz rearrangement Stille coupling Stobbe condensation Stollé synthesis Stork acylation Stork enamine alkylation Strecker amino acid synthesis Strecker degradation Strecker sulfite alkylation Strecker synthesis Stereocontrolled 1,2-addition to carbonyl groups Suzuki coupling Swain equation Swarts reaction Swern oxidation
=== Procedure (Micro Assay, 1-10 μg protein/mL) === Prepare standard concentrations of protein of 1, 5, 7.5 and 10 μg/mL. Prepare a blank of NaCl only. Prepare a series of sample dilutions. Add 100 μL of each of the above to separate tubes (use microcentrifuge tubes) and add 1.0 mL of Coomassie Blue to each tube. Turn on and adjust a spectrophotometer to a wavelength of 595 nm, and blank the spectrophotometer using 1.5 mL cuvettes or use a mobile smartphone camera (RGBradford method). Wait 2 minutes and read the absorbance of each standard and sample at 595 nm. Plot the absorbance of the standards vs. their concentration. Compute the extinction coefficient and calculate the concentrations of the unknown samples.
== Genetics == The VWF gene is located on the short arm p of chromosome 12 (12p13.2). It has 52 exons spanning 178 kbp. Types 1 and 2 are inherited as autosomal dominant traits. Occasionally, type 2 also inherits recessively. Type 3 is inherited as autosomal recessive. However, some individuals heterozygous for type 3 may be diagnosed with VWD type 1, indicating an intermediate inheritance in those cases. VWD occurs in approximately 1% of the population and affects men and women equally. Genetic testing is typically not part of the initial workup for von Willebrand disease, and is not needed for people diagnosed with type 1 VWD based on clinical history and laboratory tests. It is mainly useful for:
Coninae Fleming, 1822 — synonyms: Conulinae Rafinesque, 1815 (inv.); Textiliinae da Motta, 1995 (n.a.) Clathurellinae H. Adams & A. Adams, 1858 — synonyms: Defranciinae Gray, 1853 (inv.); Borsoniinae A. Bellardi, 1875; Pseudotominae A. Bellardi, 1888; Diptychomitrinae L. Bellardi, 1888; Mitrolumnidae Sacco, 1904; Mitromorphinae Casey, 1904; Lorinae Thiele, 1925 Conorbiinae de Gregorio, 1880—synonym: Cryptoconinae Cossmann, 1896 Mangeliinae P. Fischer, 1883—synonym: Cytharinae Thiele, 1929 Oenopotinae Bogdanov, 1987—synonym: Lorinae Thiele, 1925 sensu Thiele Raphitominae A. Bellardi, 1875—synonyms: Daphnellinae Casey, 1904; Taraninae Casey, 1904; Thatcheriidae Powell, 1942; Pleurotomellinae F. Nordsieck, 1968; Andoniinae Vera-Pelaez, 2002 † Siphopsinae Le Renard, 1995
Sources: en.wikipedia.org
A large-scale study was conducted in Mexico. The study compared 793,487 adults vaccinated with different vaccines with 4,792,338 unvaccinated adults between 24 December 2020, and 27 September 2021.The results were as follows:
Factors affecting chain length and pattern distribution α-Keto acid primers are used to produce branched-chain fatty acids that, in general, are between 12 and 17 carbons in length. The proportions of these branched-chain fatty acids tend to be uniform and consistent among a particular bacterial species but may be altered due to changes in malonyl-CoA concentration, temperature, or heat-stable factors (HSF) present. All of these factors may affect chain length, and HSFs have been demonstrated to alter the specificity of BCKA decarboxylase for a particular α-keto acid substrate, thus shifting the ratio of branched-chain fatty acids produced. An increase in malonyl-CoA concentration has been shown to result in a larger proportion of C17 fatty acids produced, up until the optimal concentration (≈20μM) of malonyl-CoA is reached. Decreased temperatures also tend to shift the fatty-acid distribution slightly toward C17 fatty-acids in Bacillus species.
=== Late modern botany === Building upon the gene-chromosome theory of heredity that originated with Gregor Mendel (1822–1884), August Weismann (1834–1914) proved that inheritance only takes place through gametes. No other cells can pass on inherited characters. The work of Katherine Esau (1898–1997) on plant anatomy is still a major foundation of modern botany. Her books Plant Anatomy and Anatomy of Seed Plants have been key plant structural biology texts for more than half a century.
==== Homeopathic HCG for weight control ==== Controversy about, and shortages of, injected HCG for weight loss have led to substantial Internet promotion of "homeopathic HCG" for weight control. The ingredients in these products are often obscure, but if prepared from true HCG via homeopathic dilution, they contain either no HCG at all or only trace amounts. Moreover, it is highly unlikely that oral HCG is bioavailable due to the fact that digestive protease enzymes and hepatic metabolism renders peptide-based molecules (such as insulin and human growth hormone) biologically inert. HCG can likely only enter the bloodstream through injection. The United States Food and Drug Administration has stated that over-the-counter products containing HCG are fraudulent and ineffective for weight loss. They are also not protected as homeopathic drugs and have been deemed illegal substances. HCG is classified as a prescription drug in the United States and it has not been approved for over-the-counter sales by the FDA as a weight loss product or for any other purposes, and therefore neither HCG in its pure form nor any preparations containing HCG may be sold legally in the country except by prescription. In December 2011, FDA and FTC started to take actions to pull unapproved HCG products from the market. In the aftermath, some suppliers started to switch to "hormone-free" versions of their weight loss products, where the hormone is replaced with an unproven mixture of free amino acids or where radionics is used to transfer the "energy" to the final product.
=== Adulterant in cocaine === Lidocaine is often added to cocaine as a diluent. Cocaine and lidocaine both numb the gums when applied. This gives the user the impression of high-quality cocaine when in actuality the user is receiving a diluted product.
Sources: en.wikipedia.org
It is a synthetic peptide analogue of growth hormone-releasing hormone. Four substitutions in its sequence make it more resistant to enzymatic degradation than the natural hormone. In the version carrying a drug affinity complex, the peptide binds albumin and remains in circulation for days.
No regulatory agency has approved CJC-1295 for clinical use. Human trials were conducted in the 2000s, but the development programme was discontinued before any marketing application succeeded. Material sold today is offered as a research chemical, and its purity depends on the supplier.
Sermorelin is an unmodified fragment of growth hormone-releasing hormone and is cleared quickly. CJC-1295 contains substitutions that resist breakdown, and the form with a drug affinity complex persists much longer. Both act at the same receptor but differ substantially in duration of action.
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.