The short version of peptide hormone fits in a sentence. The long version — which is the one that helps — is below.
This page was last updated on 2026-06-30 and is reviewed periodically as new material appears.
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.
Clinical development of AOD-9604 included trials in people with obesity. Reports from early-phase and mid-phase studies described modest or inconsistent changes in body weight. A phase IIb program did not meet its primary endpoint, and the compound was not approved for medical use. Differences in formulation, delivery route, and participant characteristics may explain some of the variation. Later investigations explored whether the peptide might have effects in other tissues, including cartilage.
Regulatory treatment of AOD-9604 is shaped by its classification as a peptide hormone. The World Anti-Doping Agency lists it as a prohibited substance, and many national anti-doping organizations adopt that list. It does not hold approval as a prescription medicine in the United States, the European Union, or other major markets. Products sold online are frequently labeled for research use only and may not undergo independent quality testing. Import and possession rules differ by country, so legal status depends on local law.
| Property | Value | Notes |
|---|---|---|
| Molecular class | Synthetic peptide | Derived from a fragment of human growth hormone |
| Sequence basis | hGH residues 176-191 | Commonly described as a 16-amino-acid fragment |
| Appearance | White to off-white powder | Typical for lyophilized research peptides |
| Solubility | Soluble in water or aqueous buffer | Exact solubility depends on pH and purity |
| Common synonyms | AOD9604; hGH 176-191 | Spelling and punctuation vary across sources |
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.
Research on AOD-9604 also examines how the peptide is measured in biological samples. Analytical methods may include liquid chromatography coupled with mass spectrometry, immunoassays, or both. Detection can be challenging because the peptide is small and may be present at low concentrations. Published methods vary in sensitivity and specificity, so comparative interpretation requires attention to validation details. The presence of related hGH fragments can complicate identification in some matrices.
Stability of AOD-9604 depends on storage conditions. Lyophilized powder is generally more stable than reconstituted solution. Recommended storage is typically at -20°C or lower, protected from light and moisture. Repeated freeze-thaw cycles can cause aggregation or degradation. In solution, the peptide may be susceptible to hydrolysis or oxidation, so aliquoting and cold storage are common practices. Researchers often add stabilizers such as mannitol or trehalose during lyophilization to improve shelf life.
Quality control for AOD-9604 involves verifying identity, purity, and concentration. Suppliers may provide a certificate of analysis listing HPLC purity and mass spectrometry data. Independent verification is advised because peptide products can vary in quality. Researchers should check for counterions, residual solvents, and microbial contamination. Proper documentation supports reproducibility and safety in laboratory studies. When sourcing, institutions often require third-party testing and detailed chain-of-custody records. These steps help ensure that experimental results are attributable to the peptide rather than impurities.
Analytical characterization of AOD-9604 typically employs reversed-phase high-performance liquid chromatography (RP-HPLC) to assess purity and identity. Mass spectrometry provides confirmation of molecular mass, while amino acid analysis can verify composition. These methods are standard for peptide research chemicals. Because the peptide lacks a distinct chromophore, detection often relies on ultraviolet absorbance at 214 nm or mass spectrometric response. Laboratories may also use capillary electrophoresis for separation. For example, size-exclusion chromatography can detect aggregates.
Paper-based microfluidic devices are often referred to as microfluidic paper-based analytical devices (μPADs) and can detect such things as nitrate, preservatives, or antibiotics in meat by a colorimetric reaction that can be detected with a smartphone. These methods are being researched because they use less reactants, space, and time compared to traditional techniques such as liquid chromatography. μPADs also make home detection tests possible, which is of interest to those with allergies and intolerances. In addition to paper-based methods, research demonstrates droplet-based microfluidics shows promise in drastically shortening the time necessary to confirm viable bacterial contamination in agricultural waters in the domestic and international food industry.
Especially since 2023, Xi has also overseen significant anti-corruption efforts in the military, with some targets involving those that rose to prominence under his leadership. Those targeted included former defense ministers Li Shangfu and Wei Fenghe, CMC vice chairmen He Weidong and Zhang Youxia, and CMC member Miao Hua. In addition, former Xinjiang Party Secretary and Politburo member Ma Xingrui was put under investigation in 2026. Bloomberg News estimated that as October 2025, at least 14 generals out of 79 appointed under Xi's leadership have been ousted. Xi has introduced stringent restrictions on naked officials, CCP officials with spouses or children residing abroad, eventually culminating in a 2025 campaign to require cadres of vice-ministerial rank or above being required to either repatriate family members or resign from office.
The known amino acids to be targeted in the protein are tyrosine and threonine, and sometimes serine. When charges on a protein undergo a change, it affects the characteristics of the protein, normally by altering its shape via interactions of the amino acids which make up the protein. AMPylation can have various effects on the protein. These are properties of the protein like, stability, enzymatic activity, co-factor binding, and many other functional capabilities of a protein. Another function of adenylylation is amino acids activation, which is catalyzed by tRNA aminoacyl synthetase. The most commonly identified protein to receive AMPylation are GTPases, and glutamine synthetase.
==== Adverse effects ==== The most common adverse effects of nabilone include drowsiness, dizziness, dry mouth, euphoria, concentration difficulties, ataxia, and headache. It has the potential to affect the central nervous system, resulting in anxiety, disorientation, depression, hallucinations and psychosis. Moreover, it may lead to cardiovascular side effects such as orthostatic hypotension and tachycardia. Gastrointestinal adverse reactions also include anorexia, constipation, nausea, vomiting, and oral paresthesia (sensation of tingling in the mouth).
Sources: en.wikipedia.org
=== Nobel Prize in Physiology or Medicine (1923) === In October 1923, Banting and Macleod were jointly awarded the 1923 Nobel Prize in Physiology or Medicine "for the discovery of insulin". Within a month of the award ceremony, Banting had given Best one-half of his share in the $US24,000 prize, and Macleod had given Collip one-half of his share.
18 October – The body of former first minister Alex Salmond is flown from North Macedonia to Scotland in a private jet paid for by businessman Tom Hunter. Former Daily Record editor Murray Foote announces he is standing down as chief executive of the SNP after 14 months in the post. 19 October – The SNP appoints Carol Beattie, a former chief executive of Stirling Council, as interim chief executive following the resignation of Murray Foote. 20 October – An amber weather alert is in place for western Scotland and the north and west of Northern Ireland as Storm Ashley arrives in the UK; yellow alerts are issued for other parts of Scotland, Northern Ireland and the Welsh coast. 21 October – Non-teaching staff at primary schools in John Swinney's Perth and Kinross constituency go on strike over pay and conditions, threatening a walkout that could last two weeks. 23 October – Duncan Ferguson is dismissed as manager of Inverness Caledonian Thistle after the club goes into administration. Jack Crawley is sentenced to life imprisonment with a minimum of 37 years for the October 2023 murder of army veteran Paul Taylor with a hammer in. 25 October – Dylan Brister and Cameron Allan are sentenced to minimum prison terms of 23 and 19 years respectively for the drugging, rape and murder of Calum Simpson, which occurred in November 2021. 29 October – The funeral of Alex Salmond is held at the parish church in Strichen, Aberdeenshire.
== Physiology == Free fatty acids (FFAs) are liberated from lipoproteins by lipoprotein lipase (LPL) and enter the adipocyte, where they are reassembled into triglycerides by esterifying them onto glycerol. Human fat tissue contains from 61% to 94% lipids. Lean and obese individuals tend towards the low and high ends of this range, respectively. There is a constant flux of FFAs entering and leaving adipose tissue. The net direction of this flux is controlled by insulin and leptin—if insulin is elevated, then there is a net inward flux of FFA, and only when insulin is low can FFA leave adipose tissue. Insulin secretion is stimulated by high blood sugar, which results from consuming carbohydrates. In humans, lipolysis (hydrolysis of triglycerides into free fatty acids) is controlled through the balanced control of lipolytic B-adrenergic receptors and a2A-adrenergic receptor-mediated antilipolysis. Fat cells have an important physiological role in maintaining triglyceride and free fatty acid levels, as well as determining insulin resistance. Abdominal fat has a different metabolic profile—being more prone to induce insulin resistance. This explains to a large degree why central obesity is a marker of impaired glucose tolerance and is an independent risk factor for cardiovascular disease (even in the absence of diabetes mellitus and hypertension). Recent advances in biotechnology have allowed for the harvesting of adult stem cells from adipose tissue, allowing stimulation of tissue regrowth using a patient's own cells.
Sources: en.wikipedia.org
== Structure == The structure of KLB was established by a combination of mass-spectrometry and NMR methods. Klebsazolicin is 23-aminoacid long peptide, containing four azoles (3 thiazoles and an oxazole) and an N-terminal lactamidine ring. The latter is formed by a linkage between two N-terminal amino acids (serine and glutamine) and is absolutely essential for bioactivity.
Systemic delivery into many cells in adult organisms can be accomplished by using covalent conjugates of Morpholino oligos with cell-penetrating peptides, and, while toxicity has been associated with moderate doses of the peptide conjugates, they have been used in vivo for effective oligo delivery at doses below those causing observed toxicity. An octa-guanidinium dendrimer attached to the end of a Morpholino can deliver the modified oligo (called a Vivo-Morpholino) from the blood to the cytosol. Delivery-enabled Morpholinos, such as peptide conjugates and Vivo-Morpholinos, show promise as therapeutics for viral and genetic diseases.
West of Borgo Dora stands Rione Valdocco ('Valdocco neighbourhood'), enclosed by Via Cigna, Corso Regina Margherita, Corso Principe Oddone and the River Dora. This neighbourhood hosts the significant architecture of Santuario di Maria Ausiliatrice ('Maria Ausiliatrice Sanctuary') in the homonymous square and behind the church stands San Pietro in Vincoli old cemetery. Overall, the main thoroughfares of the West side of Aurora are Via Cigna, which crosses the district from north to south, Corso Vercelli, a historical avenue starting north of the River Dora, and Corso Principe Oddone, part of the long Spina Centrale boulevard that will be built over the underground Turin-Milan railway. However, the Spina Centrale project is proceeding slowly because of the lack of funds and the boulevard is still occupied by a large worksite along its span. Once completed, Aurora district will be connected to Eastern San Donato, thanks to a better connection among the roads of the two adjacent districts (i.e. Corso Ciriè will continue in Corso Gamba and Strada del Fortino in Corso Rosai). As for the rest of Aurora, the district is crossed by an important thoroughfare named Corso Giulio Cesare, a long boulevard that extends from Porta Palazzo up to Turin-Trieste motorway entrance in the northern urban fringe of Turin. Other significant roads are Corso Palermo, Via Bologna and Corso Regio Parco, mostly in the East side of Aurora which is known as Borgo Rossini ('Rossini Borough').
Law enforcement agencies searched the houses of several former Ukrainian officials in an anti-corruption raid. PMC Wagner have published a photo claiming a capture of what remained from the depopulated Sakko I Vantsetti village.
Sources: en.wikipedia.org
No, it is a synthetic peptide fragment corresponding to a small portion of hGH. It is not the full 191-amino-acid hormone and does not reproduce all of hGH's effects.
It is commonly described as a 16-amino-acid peptide based on residues 176-191 of human growth hormone. Some sources vary in notation, so checking the stated sequence is useful.
It is not typically described as a standalone natural hormone. The sequence is derived from the C-terminal region of human growth hormone, but the synthetic peptide is a laboratory-made construct.
No. Major drug regulators have not approved AOD-9604 for weight loss or any other therapeutic indication. It remains an investigational compound studied in research settings.