AOD-9604 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.
Last reviewed on 2026-01-07. Where a claim depends on a specific study, the study is described rather than over-claimed.
AOD-9604 is prohibited in sport by the World Anti-Doping Agency under the peptide hormone class. Its presence in a sample can be detected through mass spectrometry-based methods, although the exact assay depends on the laboratory. In research settings, material is often supplied as a lyophilized powder for reconstitution. Buyers and researchers should note that products labeled AOD-9604 may vary in purity and actual peptide content. Analytical certificates and independent testing are common ways to verify identity, but no global harmonized standard exists for all commercial lots.
AOD-9604 is a synthetic peptide whose sequence is modeled on the C-terminal region of human growth hormone. Published descriptions commonly place it as a modified fragment corresponding to hGH amino acids 176–191, with a tyrosine residue added or retained at the N-terminus to support detection and handling. It is not intact growth hormone and lacks the full receptor-binding architecture of the parent protein. The molecule was developed as a research candidate for metabolic studies rather than as a replacement for growth hormone therapy. Its identity is defined by its amino acid sequence rather than by any single commercial preparation.
AOD-9604 drew attention in the 1990s and 2000s as a potential anti-obesity agent. Early work explored both injectable and oral routes, which is unusual for a peptide of this size. Animal studies reported changes in fat metabolism without the growth-promoting or insulin-like effects associated with full-length growth hormone. Subsequent human trials produced mixed or modest results, and the compound did not obtain regulatory approval for weight management in major markets. It remains known mainly through research literature, sports anti-doping listings, and non-approved supplement advertising.
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.
| Property | Value | Notes |
|---|---|---|
| Molecular class | Synthetic peptide | Fragment analog of human growth hormone |
| Sequence basis | hGH 176–191 region | Modified C-terminal fragment |
| Common synonyms | AOD-9604; AOD9604; hGH fragment | Research and trade names vary |
| Regulatory status | Not approved as a drug | Prohibited in competitive sport |
| Research code | AOD9604 | Used in scientific and patent literature |
Researchers have studied the fragment in cell and animal models to understand its metabolic actions. Some experiments report effects on fat breakdown and fat storage pathways, but the underlying mechanism remains incompletely defined. AOD-9604 does not appear to stimulate the same broad growth hormone receptor signaling as full-length hGH. Whether its observed activities arise from direct receptor interactions or downstream metabolic changes is an open question. Results from different assays are not always consistent.
AOD-9604 is a synthetic peptide modeled on the C-terminal region of human growth hormone. It corresponds to residues 176-191 of the 191-amino-acid hGH sequence. The fragment is not the full hormone and lacks the receptor-binding region associated with growth and metabolic effects of hGH. Researchers developed it to isolate a specific portion of hGH for study. Its exact sequence and length are often stated in peptide catalogs and patents.
The peptide is frequently described as a growth hormone fragment, although it is chemically distinct from full-length hGH. AOD-9604 contains 16 amino acids and includes two cysteine residues that can form an intramolecular disulfide bond. In solution, this structural feature can influence folding, aggregation, and stability. Published descriptions sometimes call it hGH 176-191 or AOD9604, with spacing and capitalization varying. Such naming differences can complicate literature searches, database entries, and product verification.
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.
== Applications == Automated synthesis systems find new applications with a development of new robotic platforms. Possible applications include: uncontrolled synthesis, time-dependent synthesis, radiosynthesis, synthesis in demanding conditions (low temperatures, presence of specific atmosphere like CO, H2, N2, high pressure or under vacuum) or whenever the same or similar workflow needs to be applied multiple times with the aim to: optimize reactions, synthesize many derivatives in small scale, perform reactions of iterative homologations or radiosynthesis. Automated synthesis workflows are needed both in academic research and a wide array of industrial R&D settings (pharmaceuticals, agrochemicals, fine & specialty chemicals, renewables & energy research, catalysts, polymers, ceramics & abrasives, porous materials, nanomaterials, biomaterials, lubricants, paints & coatings, home care, personal care, nutrition, forensics).
An egg case or egg capsule, often colloquially called a mermaid's purse, is the casing that surrounds the eggs of oviparous chondrichthyans. Living chondricthyans that produce egg cases include some sharks, skates and chimaeras. Egg cases typically contain one embryo, except for big skate and mottled skate egg cases, which contain up to seven embryos. Oviparity is completely absent in the superorder Squalomorphi. Egg cases are also thought to have been produced by some extinct chondrichthyan groups, such as hybodonts and xenacanths.
=== Drug dependence === Gabapentin is moderately effective in reducing the symptoms of alcohol withdrawal and associated craving. The evidence in favor of gabapentin is weak in the treatment of alcoholism: it does not contribute to the achievement of abstinence, and the data on the relapse of heavy drinking and percent of days abstinent do not robustly favor gabapentin; it only decreases the percent days of heavy drinking. Gabapentin is ineffective in cocaine dependence and methamphetamine use, and it does not increase the rate of smoking cessation. While some studies indicate that gabapentin does not significantly reduce the symptoms of opiate withdrawal, there is increasing evidence that gabapentinoids are effective in controlling some of the symptoms during opiate detoxification. A clinical study in Iran, where heroin dependence is a significant social and public health problem, showed gabapentin produced positive results during an inpatient therapy program, particularly by reducing opioid-induced hyperalgesia and drug craving. There is insufficient evidence for its use in cannabis dependence.
=== Legal status === It was approved in both the European Union (brand name Revestive) and the United States (brand name Gattex) in 2012. It was granted orphan drug designation by the European Medicines Agency (EMA).
At the moment that each or every one of them is caught, whatever the circumstances, this resolution will be executed, without giving rise to minutes that provide requests and relationships capable of compromising compliance with this order and the honor of Your Excellency. This punishment must be the basis of the stability of the new system and a lesson for the chiefs of Peru, who advance to a thousand excesses for the hope of impunity and is at the same time the proof of the usefulness and energy with which this Expedition fills the important objects what is it intended for." There were also signs of Peruvian-phobia on the part of the Argentines of the Junta when Manuel Belgrano exposed on July 6, 1816, in front of the deputies of the Congress of Tucumán in two meetings, a proposal to establish an almost nominal monarchy, discussing first about choosing a European prince and then a Peruvian sovereign from the descendants of the Incas to offer the throne, it was most likely projected that the title would correspond to Juan Bautista Túpac Amaru, the only known surviving brother of the Inca noble, Túpac Amaru II, although they also considered Dionisio Inca Yupanqui, a mestizo jurist and soldier who had been educated in Europe and who was the representative of Peru at the Cortes of Cádiz, or Juan Andrés Jiménez de León Manco Cápac, a mestizo cleric and soldier who earned his fame for opposing the excessive collection of tribute and that he participated as a military commander in the uprising of Juan José Castelli.
Sources: en.wikipedia.org
=== Beginnings === Chromosomes were first observed in plant cells by Carl Nägeli in 1842. Their behavior in animal (salamander) cells was described by Walther Flemming, the discoverer of mitosis, in 1882. The name was coined by another German anatomist, von Waldeyer in 1888. The next stage took place after the development of genetics in the early 20th century, when it was appreciated that the set of chromosomes (the karyotype) was the carrier of the genes. Levitsky seems to have been the first to define the karyotype as the phenotypic appearance of the somatic chromosomes, in contrast to their genic contents. Investigation into the human karyotype took many years to settle the most basic question: how many chromosomes does a normal diploid human cell contain? In 1912, Hans von Winiwarter reported 47 chromosomes in spermatogonia and 48 in oogonia, concluding an XX/XO sex determination mechanism. Painter in 1922 was not certain whether the diploid number of humans was 46 or 48, at first favoring 46. He revised his opinion later from 46 to 48, and he correctly insisted on humans having an XX/XY system of sex-determination. Considering their techniques, these results were quite remarkable. In science books, the number of human chromosomes remained at 48 for over thirty years. New techniques were needed to correct this error. Joe Hin Tjio working in Albert Levan's lab was responsible for finding the approach:
Other notable derivatives then result from further modification of this template, with saturation of the 7,8-double bond of etorphine resulting in the even more potent dihydroetorphine (up to 12,000× potency of morphine) and acetylation of the 3-hydroxy group of etorphine resulting in acetorphine (8700× morphine). While the isopentyl homologue of etorphine, known as M-140, is nearly three times more potent, its 7,8-dihydro and 3-acetyl derivatives are less potent than the corresponding derivatives of etorphine at 11,000 and 1300 times morphine, respectively. Replacing the N-methyl group with cyclopropylmethyl results in opioid antagonists such as diprenorphine (M5050, which is used as an antidote to reverse the effects of etorphine, M99), and partial agonists such as buprenorphine, which is widely used in the treatment of opioid addiction, although conversely the N-cyclopropylmethyl derivative of M-140, which has the code number M-320, retains similarly potent μ-opioid full agonist activity to the N-methyl derivative. More complex substitutions on the ring system can be used to produce selective δ-opioid agonists such as BU-48, and selective κ-opioid agonists such as CL 110,393.
== Research == The research name of emapalumab was NI-0501. A phase II/III trial began in 2013 and is ongoing as of August 2018. The trial targets patients under the age of 18 who have failed to improve on conventional treatments. This study was realised in the context of an EU-funded FP7 project, named FIGHT-HLH (306124).
Campbell, MK (1999). Biochemistry (third ed.). Harcourt. ISBN 978-0-03-024426-1. Eshaghian, S; Horwich, TB; Fonarow, GC (2006). "An unexpected inverse relationship between HbA1c levels and mortality in patients with diabetes and advanced systolic heart failure". Am Heart J. 151 (1): 91.e1–91.e6. doi:10.1016/j.ahj.2005.10.008. PMID 16368297. Ganong, WF (2003). Review of Medical Physiology (21st ed.). Lange. ISBN 978-0-07-140236-1. Hager, T (1995). Force of Nature: The Life of Linus Pauling. Simon and Schuster. ISBN 978-0-684-80909-0. Hazelwood, Loren (2001) Can't Live Without It: The story of hemoglobin in sickness and in health, Nova Science Publishers ISBN 1-56072-907-4 Kneipp J, Balakrishnan G, Chen R, Shen TJ, Sahu SC, Ho NT, Giovannelli JL, Simplaceanu V, Ho C, Spiro T (2005). "Dynamics of allostery in hemoglobin: roles of the penultimate tyrosine H bonds". J Mol Biol. 356 (2): 335–53. doi:10.1016/j.jmb.2005.11.006. PMID 16368110. Hardison, Ross C. (2012). "Evolution of Hemoglobin and Its Genes". Cold Spring Harbor Perspectives in Medicine. 2 (12) a011627. doi:10.1101/cshperspect.a011627. ISSN 2157-1422. PMC 3543078. PMID 23209182.
==== Specific bacterial origin ==== Plaque is composed of a complex community of many different species of bacteria. However, specific bacterial species are recognized as being capable of causing gingival disease in isolation. Neisseria gonorrhoeae and Treponema pallidum, the causative organisms in the sexually transmitted diseases gonorrhea and syphilis may cause gingival lesions. These lesions may appear as a result of systemic infection or direct infection. Streptococcal species may rarely cause gingivitis (with or without involvement of other oral mucosal surfaces), which presents as fever, malaise and very painful, swollen red and bleeding gums, sometimes following tonsillitis.
Sources: en.wikipedia.org
== External links == Sugimura T, Nagao M, Wakabayashi K (May 1996). "Carcinogenicity of food mutagens". Environmental Health Perspectives. 104 (Suppl 3): 429–33. doi:10.2307/3432798. JSTOR 3432798. PMC 1469643. PMID 8781358. Louis ED, Zheng W, Jiang W, Bogen KT, Keating GA (June 2007). "Quantification of the neurotoxic beta-carboline harmane in barbecued/grilled meat samples and correlation with level of doneness". Journal of Toxicology and Environmental Health, Part A. 70 (12): 1014–9. Bibcode:2007JTEHA..70.1014L. doi:10.1080/15287390601172015. PMC 4993204. PMID 17497412.
Wilson predicted in January 1966 that the various boycotts would force Smith to give in "within a matter of weeks rather than months", but the British and UN sanctions had little effect on Rhodesia, largely because South Africa and Portugal went on trading with the breakaway colony, providing it with oil and other commodities. Clandestine "sanction-busting" trade with other nations also continued, initially at a reduced level and the diminished presence of foreign competitors helped domestic industries to slowly mature and expand. Rhodesia thus avoided the economic collapse predicted by Wilson and gradually became more self-sufficient. The Rhodesian government set up a string of front holding companies in Switzerland, Luxembourg and Liechtenstein to help keep trade open with some success; goods that had been imported from Britain were replaced by Japanese, French and West German equivalents. Even many OAU states, while bombarding Rhodesia with vitriol, continued importing Rhodesian food and other products. The United States created a formal exception in its embargo with the Byrd Amendment of 1971, under which the US replaced its import of chrome from the Soviet Union with Rhodesian chrome ore. This breach of the UN sanctions, passed by the US Congress on the back of anti-communist Cold War considerations, was warmly welcomed by several white Southerners in Congress; it aided the Rhodesian economy until 1977, when the new president, Jimmy Carter, successfully pushed Congress to repeal it.
== Epidemiology == SJS is a rare condition, with a reported incidence of around 2.6 to 6.1 cases per million people per year. In the United States, about 300 new diagnoses are made each year. The condition is more common in adults than in children.
Activation loop Autophosphorylation Ca2+/calmodulin-dependent protein kinase Cell signaling Cyclin-dependent kinase G protein-coupled receptor NDR kinase Nucleoside-diphosphate kinase Phosphatase Phosphatidylinositol phosphate kinases Phospholipid Phosphoprotein Phosphorylation Phosphotransferase Signal transduction Thymidine kinase Thymidine kinase in clinical chemistry Thymidylate kinase Wall-associated kinase
Sources: en.wikipedia.org
No. It is a synthetic peptide fragment modeled on part of human growth hormone, not the full hormone. It does not contain the complete sequence or receptor-binding regions of hGH.
It was investigated in clinical trials for obesity, but it did not receive approval for that use in major markets. Results were generally modest or mixed, and it remains an experimental compound.
WADA lists it as a prohibited peptide hormone. Its use can be detected by laboratory methods, and athletes are subject to sanctions if it is found in samples.
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.