If you have been reading about regulatory status 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 2026-08-01. Numbers and descriptions here follow the published literature rather than marketing material.
Commercial AOD-9604 may vary in purity, counterion content, and residual moisture. Certificates of analysis often report HPLC purity, mass confirmation, and appearance, but testing methods differ between suppliers. Independent verification is sometimes used because labeled content may not match actual peptide amount. Stability under different pH and temperature conditions is not fully standardized across studies. Researchers generally treat lyophilized material as the reference form for weighing and reconstitution. Moisture content can affect accurate mass measurement.
AOD-9604 is typically supplied as a lyophilized white to off-white powder. In this form, it is relatively stable when kept cool, dry, and protected from light. Common storage recommendations place it at −20 °C or below for long-term retention. Reconstituted solutions are less stable and are often kept at 2–8 °C for short periods. Freeze-thaw cycles should be minimized because they can promote aggregation or loss of peptide content. Vials are usually sealed under inert gas to reduce oxidation.
Identity and purity are commonly checked with reversed-phase high-performance liquid chromatography and mass spectrometry. RP-HPLC separates the peptide from related impurities and can estimate purity by peak area. Mass spectrometry confirms molecular mass and helps detect sequence variants or truncations. Some laboratories use amino acid analysis or peptide mapping for additional characterization. No single method proves biological activity; these techniques establish chemical identity and purity only. They also require suitable reference standards for confident comparison.
In laboratory settings, AOD-9604 is commonly supplied as a lyophilized powder and stored cold to limit degradation. Reconstituted solutions are typically kept refrigerated or frozen, depending on the buffer and concentration, and protected from repeated freeze-thaw cycles. Stability can be influenced by pH, temperature, and the presence of proteases. Purity is usually assessed by high-performance liquid chromatography and mass spectrometry. These practices support reproducibility, but they do not imply safety or efficacy for any human use.
Regulatory status: AOD-9604 is not approved as a therapeutic drug in the United States, European Union, or other major markets. It is listed by the World Anti-Doping Agency as a prohibited substance in sport, specifically under growth hormone fragments. Many jurisdictions restrict its sale for human consumption. Products marketed online may not meet pharmaceutical quality standards. The legal status varies by country and often depends on whether the material is presented as a research chemical, supplement, or drug.
| Property | Value | Notes |
|---|---|---|
| Appearance | White to off-white powder | Lyophilized form; may appear as cake |
| Solubility class | Water-soluble | Often reconstituted in aqueous buffer |
| Typical storage temperature | −20 °C or below | Protect from light and moisture |
| Typical analytical method | RP-HPLC and mass spectrometry | Used for purity and identity |
| Common synonyms | AOD-9604; AOD9604; hGH fragment 176-191 | Research name and fragment description |
Regulatory treatment of AOD-9604 has varied. In sports anti-doping, the peptide became widely discussed during a 2013 investigation into an Australian professional sports club. Authorities at the time debated whether it fell under prohibitions on growth hormone and related substances. Later clarifications and updated lists have addressed the compound in different ways. Anyone seeking current status should consult the latest applicable rules, and commercial supply for human use is not authorized in major markets.
Research interest in AOD-9604 often focuses on whether it can influence lipid metabolism without the growth-promoting or glucose-related effects of full-length hGH. This question remains unresolved, and findings depend on model, dose, and measurement method. Some reviews treat the peptide as a historical obesity candidate rather than an active therapeutic. Others cite it in discussions of peptide fragments, metabolic signaling, and performance-enhancing substances. Clear conclusions are limited by the small number of rigorous, independent human studies.
AOD-9604 has been investigated primarily as a potential treatment for obesity and related metabolic conditions. Early laboratory work examined its effects on fat cells, and later studies moved into animal models and human clinical trials. Some trials reportedly reached Phase II, but the program did not lead to an approved medicine. Published summaries often note that weight-loss results were modest or inconsistent. The full trial data are not all publicly available in detail.
AOD-9604 has been investigated mainly in the context of body fat and metabolic endpoints. Some early animal and small human studies reported changes in fat mass or lipid markers, but findings were not uniform. Larger, well-controlled trials that would establish efficacy are lacking in the public literature. As a result, claims about weight loss or metabolic benefit remain investigational rather than established. The distinction between a research finding and a proven clinical outcome is central to discussing this peptide.
Regulatory bodies have taken different approaches to AOD-9604. It is not approved as a prescription medicine by major agencies such as the U.S. Food and Drug Administration or the European Medicines Agency. In sport, the World Anti-Doping Agency prohibits peptide hormones, growth factors, and related substances, and AOD-9604 has been treated as a prohibited substance. These regulatory decisions reflect concerns about safety, efficacy, and potential misuse rather than proof of benefit.
Naturally occurring tungsten (74W) consists of five isotopes. Four are considered stable (182W, 183W, 184W, and 186W) and one is slightly radioactive, 180W, with an extremely long half-life of (1.59±0.05)×1018 years. This results in about two alpha decays of 180W per gram of natural tungsten per year, so for most practical purposes, 180W can be considered stable. The other naturally occurring isotopes are also capable of alpha decay and so only observationally stable. Artificial radioisotopes of tungsten have been observed from 156W to 197W, the most stable of which are 181W with a half-life of 120.96 days, 185W with a half-life of 75.1 days, 188W with a half-life of 69.77 days and 178W with a half-life of 21.6 days. All of the remaining radioactive isotopes have half-lives less than one day, and most of these less than 8 minutes. The most stable known meta state is 179m1W with half-life 6.40 minutes.
== Applications == Synthetic biology initiatives frequently aim to redesign organisms so that they can create a material, such as a drug or fuel, or acquire a new function, such as the ability to sense something in the environment. Examples of what researchers are creating using synthetic biology include:
== Mass surveillance == The Ba'athist regime ruled Syria as a totalitarian surveillance state and policed every aspect of Syrian society for decades. The commanders of the government's security forces – which consisted of the Syrian Arab Army, secret police, and Ba'athist paramilitaries – directly implemented the executive functions of the Syrian state with scant regard for due process and the rule of law. The security services had shut down civil society organizations, curtailed freedom of movement within the country and banned non-Ba'athist political literature and symbols. During Ba'athist rule, the militarization of Syrian society intensified. The number of personnel in the Syrian military and various intelligence entities expanded drastically from 65,000 in 1965 to 530,000 in 1991; and surpassed 700,000 in 2004. The Ba'athist secret police consisted of four wings: the general intelligence and the political security directorates, which were supervised by the Syrian Ministry of Interior, as well as the military intelligence and the air force intelligence directorates, which were supervised by the Syrian Ministry of Defence. The four directorates were directly controlled by the National Security Bureau of the Arab Socialist Ba'ath Party, and the heads of the four branches reported directly to the Syrian president, who was also the secretary general of the Ba'ath Party. The surveillance system of the Mukhabarat was pervasive, and over 65,000 full-time officers were estimated to be working in its various branches during the 2000s.
== Immune function == Platelets have a central role in innate immunity, initiating and participating in multiple inflammatory processes, directly binding and even destroying pathogens. Clinical data show that many patients with serious bacterial or viral infections have thrombocytopenia, thus reducing their contribution to inflammation. Platelet-leukocyte aggregates (PLAs) found in circulation are typical in sepsis or inflammatory bowel disease, showing the connection between thrombocytes and immune cells. The platelet cell membrane has receptors for collagen. Following rupture of the blood vessel wall, platelets are exposed and adhere to the collagen in the surrounding tissue.
== External links == visfatin,+human at the U.S. National Library of Medicine Medical Subject Headings (MeSH) NAMPT human gene location in the UCSC Genome Browser. NAMPT human gene details in the UCSC Genome Browser. Overview of all the structural information available in the PDB for UniProt: P43490 (Human Nicotinamide phosphoribosyltransferase) at the PDBe-KB. Overview of all the structural information available in the PDB for UniProt: Q99KQ4 (Mouse Nicotinamide phosphoribosyltransferase) at the PDBe-KB.
Sources: en.wikipedia.org
Angelopoulos was awarded honorary doctorates by the Université libre de Bruxelles, Belgium in 1995, by Paris West University Nanterre La Défense, France, by the University of Essex, UK in July 2001, by the University of Western Macedonia, Greece in December 2008, and by the University of the Aegean, Greece in December 2009.
== Structure == Convulxin is a heterodimer made up of α-(13.9 kDa) and β- (12.6 kDa) subunits, with 38% sequence identity and homologous structures. The subunits are connected by disulfide bridges to form a cyclic, ring-like α4β4 structure . Its function arises from its ability to bind with high affinity to the platelet receptor for collagen, glycoprotein (GP) VI. It is, therefore, an important task to determine the binding site on the heterodimer to the GPVI. The heterodimer structure presents a concave surface, predicted to be the ligand binding site. Furthermore, general research into the C-type lectin family describes the binding site as being formed by loop regions, falling between the second α-helix and the second β-strand on both the α- and β-subunits. Investigating the particular sequences of these structures showed high variability, suggesting that it is indeed these variable, concave loops that offer specificity in ligand binding. Analysis on the specific Cvx structure has revealed 3 possible sites of interaction with GPVI. Firstly, two adjacent patches of positive and negative charge on the α-subunit; secondly, a cavity in the same subunit lines with the following residues:Trp23, Ser67, Leu104, Ala117, Gly121 and Ile123; finally, a negatively charged patch on the β-subunit.
=== Discovery of PI-3-kinase and PtdIns(3,4)P2 === In a series of studies spanning several years, Cantley and colleagues demonstrated that a kinase activity associated with the middle T oncoprotein is a phosphoinositide kinase, that it is a novel type of phosphoinositide kinase that phosphorylates the 3' position on the inositol ring, and that this phosphatidylinositol-3-kinase (PI-3-kinase) is activated by growth factors to produce novel 3'-phosphorylated phosphoinositides, in particularly PtdIns(3,4,5)P3 that had previously been identified in physiologically stimulated human neutrophils. In subsequent years Cantley and colleagues identified critical aspects of the regulation of PI-3-kinase by growth factor receptors. Specifically, they discovered that the catalytic subunit p110 dimerizes with the regulatory subunit p85, and that the SH2 domain of p85 specifically recognized phosphotyrosines on growth factor receptors or adaptor proteins via the pY-X-X-M motif. The Cantley lab has also made seminal contributions to understanding signaling downstream of PI-3-kinase. They discovered that the Pleckstrin Homology domain of AKT binds to PtdIns(3,4,5)P3 (and PtdIns(3,4)P2) and that this binding is critical for activation of AKT catalytic activity. They further demonstrated that tuberin/TSC2 is a critical substrate of AKT, and together with the laboratory of John Blenis they discovered that AKT phosphorylation of tuberin/TSC2 is required for activation of mTOR TORC1 kinase activity via regulation of the small GTPase rheb.
==== Glutamatergic, neurotrophic, and neuroplastic modulation ==== Research suggests that tianeptine produces its antidepressant effects through indirect alteration and inhibition of glutamate receptor activity (i.e., AMPA receptors and NMDA receptors) and release of BDNFTooltip brain-derived neurotrophic factor, in turn affecting neural plasticity. Some researchers hypothesize that tianeptine has a protective effect against stress induced neuronal remodeling. There is also action on the NMDA and AMPA receptors. In animal models, tianeptine inhibits the pathological stress-induced changes in glutamatergic neurotransmission in the amygdala and hippocampus. It may also facilitate signal transduction at the CA3 commissural associational synapse by altering the phosphorylation state of glutamate receptors. With the discovery of the rapid and novel antidepressant effects of drugs such as ketamine, many believe the efficacy of antidepressants is related to promotion of synaptic plasticity. This may be achieved by regulating the excitatory amino acid systems that are responsible for changes in the strength of synaptic connections as well as enhancing BDNF expression, although these findings are based largely on preclinical studies.
Sources: en.wikipedia.org
relaxation of muscle spasms prevention and retardation of disuse atrophy increase of local blood circulation muscle rehabilitation and re-education electrical muscle stimulation maintaining and increasing range of motion management of chronic and intractable pain including diabetic neuropathy acute post-traumatic and post-surgical pain post-surgical stimulation of muscles to prevent venous thrombosis wound healing drug delivery There is limited evidence supporting electrotherapy, specifically in treating musculoskeletal, osteoarthritis, fibromyalgia, neck pain, lumbopelvic pain, and ulcer conditions. Some of the treatment effectiveness mechanisms are little understood. The natural neurostimulation hypothesis explains the therapeutic effect by the fact that energy stimuli induce mitochondrial stress and microvascular vasodilation. Since healthy neurostimulation should emulate the physical characteristics of a mother's care for her fetus during pregnancy scaled to the treatment parameters of the specific patient, but many techniques of electrotherapy do not consider this, the hypothesis claims that their effectiveness and some practices associated with their use are still anecdotal.
Nicotinamide, as a part of the cofactor nicotinamide adenine dinucleotide (NADH / NAD+), is crucial to life. In cells, nicotinamide is incorporated into NAD+ and nicotinamide adenine dinucleotide phosphate (NADP+). NAD+ and NADP+ are cofactors in a wide variety of enzymatic oxidation-reduction reactions, most notably glycolysis, the citric acid cycle, and the electron transport chain. If humans ingest nicotinamide, it will likely undergo a series of reactions that transform it into NAD, which can then undergo a transformation to form NADP+. This method of creation of NAD+ is called a salvage pathway. However, the human body can produce NAD+ from the amino acid tryptophan and niacin without ingestion of nicotinamide. NAD+ acts as an electron carrier that mediates the interconversion of energy between nutrients and the cell's energy currency, adenosine triphosphate (ATP). In oxidation-reduction reactions, the active part of the cofactor is the nicotinamide. In NAD+, the nitrogen in the aromatic nicotinamide ring is covalently bonded to adenine dinucleotide. The shared electrons of the other carbon atoms in the aromatic ring stabilize the formal charge on the nitrogen. When a hydride atom is added onto NAD+ to form NADH, the molecule loses its aromaticity and therefore a good amount of stability. This higher-energy product later releases its energy by donating a hydride, and in the case of the electron transport chain, it assists in forming adenosine triphosphate. When one mole of NADH is oxidized, it releases 158.2 kJ of energy.
== Amphiphiles == Amphiphiles are molecules that have both hydrophobic and hydrophilic domains. Detergents are composed of amphiphiles that allow hydrophobic molecules to be solubilized in water by forming micelles and bilayers (as in soap bubbles). They are also important to cell membranes composed of amphiphilic phospholipids that prevent the internal aqueous environment of a cell from mixing with external water.
Sources: en.wikipedia.org
Lyophilized powder is commonly stored at −20 °C or below, protected from light and moisture. Reconstituted solutions are typically kept refrigerated and used within a limited period.
Reversed-phase HPLC and mass spectrometry are standard checks. They confirm peptide purity and molecular mass, but they do not by themselves demonstrate biological activity.
Synthesis, purification, and handling conditions can differ, leading to variations in purity and salt content. Certificates of analysis help, but independent testing is often needed for verification.
No major regulatory agency has approved AOD-9604 as a medicine. It is treated as an experimental peptide in research settings. Some countries restrict its sale or import.