REV-ERB agonist 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 2026-05-06. Where a claim depends on a specific study, the study is described rather than over-claimed.
Detection in biological samples can be complicated by rapid metabolism and low circulating concentrations. Some studies report phase I and phase II metabolites, and analytical methods may need to target those species in addition to the parent compound. Immunoassays are not broadly available, so mass spectrometry remains the main confirmatory approach. For anti-doping testing, laboratories look for SR9009 and its metabolites using validated LC-MS methods. Open questions include how long metabolites remain detectable and how different routes of administration alter detection windows.
In laboratory settings, SR9009 is typically characterized by liquid chromatography–mass spectrometry (LC-MS) or high-performance liquid chromatography with ultraviolet detection (HPLC-UV). These methods can confirm identity and estimate purity, but they require reference standards for accurate quantification. Because SR9009 is not a licensed pharmaceutical, no harmonized pharmacopeial monograph exists. Laboratories often validate in-house methods for matrices such as plasma, urine, or cell culture media. Sample preparation may involve protein precipitation or liquid-liquid extraction before analysis.
Physicochemical behavior influences handling. SR9009 is described as a solid with limited aqueous solubility, so organic solvents such as dimethyl sulfoxide or ethanol are common in research stock solutions. Aqueous dilution can produce precipitates if the organic content is too low. Light, heat, and repeated freeze-thaw cycles may affect stability. Storage recommendations usually specify a desiccated freezer environment protected from light, but exact stability data depend on the formulation and matrix.
Regulatory treatment of SR9009 varies by country and context. It is not approved as a therapeutic drug by agencies such as the United States Food and Drug Administration or the European Medicines Agency. Sports authorities list it as a prohibited substance; the World Anti-Doping Agency classifies it among hormone and metabolic modulators. Legal status for personal possession or sale differs across jurisdictions, and some countries may restrict it under analog or research chemical laws. Buyers who seek verified material often rely on independent laboratory testing because online product labels may not match contents.
Laboratory samples of SR9009 are typically handled as research chemicals rather than pharmaceuticals. Suppliers usually state that the material is for research use only and not for human or veterinary administration. Storage recommendations generally call for a freezer at approximately −20 °C, protection from light, and a desiccated environment. The solid is often described as a white to off-white powder. Solubility is commonly reported in organic solvents such as dimethyl sulfoxide and ethanol, with low solubility in water.
| Property | Value | Notes |
|---|---|---|
| Appearance | Off-white to pale yellow solid | Visual description varies with purity and source |
| Solubility | Soluble in DMSO and ethanol; poorly soluble in water | Organic stock solutions are common in research |
| Typical storage | -20 °C, desiccated, protected from light | Avoid repeated freeze-thaw cycles |
| Typical analytical method | LC-MS or HPLC-UV | Reference standards are needed for quantification |
| Molar mass | Approximately 437.9 g/mol | Calculated from the reported free-base formula |
Regulatory and sporting contexts treat SR9009 as a prohibited substance in many elite competitions. Its presence on banned lists reflects concerns about performance enhancement and unknown long-term safety. Analytical chemists have developed methods to detect the parent compound and its metabolites in urine and blood. Literature discussions distinguish between in vitro potency, animal pharmacology, and anecdotal human reports. The latter are difficult to verify because products sold online may lack purity or contain different compounds.
SR9009 is a synthetic small molecule studied as an agonist of the nuclear receptors REV-ERBα and REV-ERBβ. These receptors help regulate circadian rhythms, lipid metabolism, and inflammatory gene expression. In cell and animal experiments, SR9009 alters transcription of clock-controlled genes and metabolic pathways. The compound is not a hormone and does not resemble classical steroid structures. Its activity depends on binding to the ligand-binding domain of REV-ERB, where it can modify corepressor recruitment.
Research interest in SR9009 grew from studies of circadian biology and metabolic disease. Preclinical reports describe effects on exercise capacity, muscle metabolism, and blood lipid levels in rodents, but these findings come from controlled laboratory settings. The compound has low oral bioavailability in animals, which limits systemic exposure after swallowing. Investigators often use injected routes in experiments to achieve measurable plasma concentrations. Human clinical data are sparse, no approved therapeutic product exists, and whether animal effects translate to humans remains an open question.
Research interest in SR9009 grew from studies showing improved running endurance in mice after short treatment periods. Those experiments linked the compound to increased mitochondrial content and fatty acid oxidation in muscle, but the findings come from animal models and specific dosing schedules. Independent replication has been limited, and the pathways connecting REV-ERB activation to exercise performance are still being mapped. Whether similar responses occur in humans is an open question.
SR9009 is often grouped with compounds studied for circadian and metabolic regulation rather than with classical anabolic steroids. Its interactions with nuclear receptors differ from those of androgen receptor ligands, and its proposed mechanisms involve transcriptional control rather than direct hormone signaling. Some sources classify it as a metabolic modulator because of observed effects on energy utilization. The distinction matters for regulation and for interpreting research results across different compound classes.
SR9009 is a synthetic small molecule developed as a REV-ERB agonist. It binds to REV-ERBα and REV-ERBβ, nuclear receptors that help regulate circadian rhythms and metabolic gene expression. In cell and animal studies, the compound alters lipid and glucose handling and influences skeletal muscle oxidative capacity. Its exact effects in humans remain largely uncharacterized because controlled clinical trials have not been reported. The molecule is frequently described in preclinical literature as a metabolic modulator.
== See also == Alexis St. Martin – Canadian subject of digestion experiments (1802–1880) Fistulated cow M. Ijaiya's technique – Surgical procedure to close juxtacervical vesicovaginal fistulae Obstetric fistula Stoma (medicine)
Transport theory provides an alternative interpretation of viscosity in terms of momentum transport: viscosity is the material property which characterizes momentum transport within a fluid, just as thermal conductivity characterizes heat transport, and (mass) diffusivity characterizes mass transport. This perspective is implicit in Newton's law of viscosity,
== N-terminal modifications == Protein N-termini can be modified co - or post-translationally. Modifications include the removal of initiator methionine (iMet) by aminopeptidases, attachment of small chemical groups such as acetyl, propionyl and methyl, and the addition of membrane anchors, such as palmitoyl and myristoyl groups
Oil money funded social welfare programs, leading to housebuilding projects and improved healthcare and education. House building became a major social priority to eliminate homelessness and replace the shanty towns created by Libya's growing urbanization. The health sector was also expanded; by 1978, Libya had 50 per cent more hospitals than it had in 1968, while the number of doctors had increased from 700 to over 3,000 in that decade. Malaria was eradicated, and trachoma and tuberculosis greatly curtailed. Compulsory education was expanded from 6 to 9 years, while adult literacy programs and free university education were introduced. Beida University was founded, while Tripoli University and Benghazi University were expanded. In doing so, the government helped integrate the poor into the education system. Through these measures, the RCC greatly expanded the public sector, providing employment for thousands. These early social programs proved popular within Libya, partly due to Gaddafi's personal charisma, youth, underdog status as a Bedouin, and his rhetoric emphasizing himself as a successor to the anti-Italian fighter Omar al-Mukhtar. To combat the country's strong regional and tribal divisions, the RCC promoted the idea of a unified pan-Libyan identity. They discredited tribal leaders as agents of the old regime, and in August 1971 a Sabha military court tried many of them for counter-revolutionary activity.
In art, literature, and movies, dwarfs are rarely depicted as ordinary people who are very short but rather as a species apart. Novelists, artists, and moviemakers may attach special moral or aesthetic significance to their "apartness" or misshapenness. Artistic representations of dwarfism are found on Greek vases and other ancient artifacts, including ancient Egyptian art in which dwarfs are likely to have been seen as a divine manifestation, with records indicating that they were able to reach high positions in society at the time. The ancient Hindu text Bhagavata Purana devotes nine chapters to the legend of Vamana, the dwarf avatar of Vishnu.
Sources: en.wikipedia.org
On 21 March 2020, Bukele imposed a 30-day nationwide lockdown in an effort to combat the pandemic. During the lockdown, 4,236 people were arrested by the National Civil Police for violating the lockdown order; 70 were arrested before the lockdown order became public. The arrestees were quarantined in a "containment center". Human rights organizations such as Human Rights Watch criticized the arrests, citing instances of arbitrary arrests and abuse by police. Amid April 2020 lockdowns in the country's prisons and published images of prisoners lined up in cramped positions, Human Rights Watch called the prisons' living conditions "inhumane" (particularly in light of the pandemic). On 27 May 2020, the United States donated 250 ventilators to El Salvador. During a press conference where Bukele received the ventilators, he said that he took hydroxychloroquine as prophylaxis and added that "most of the world's leaders use [hydroxychloroquine] as a prophylaxis". Bukele inaugurated the Hospital El Salvador, the largest hospital in Latin America used exclusively for treating cases of COVID-19 at the site of the former International Center for Fairs and Conventions, on 22 June 2020. The hospital had a capacity of 400 beds, 105 intensive-care units, and 295 intermediate-care units staffed by 240 doctors. In August 2020, the hospital's capacity was increased by 575 beds. It began treating conditions other than COVID-19 by June 2022.
== Pathway == The ANGPTL8 regulatory pathway has been constructed recently by integrating the information of its known transcription factors which is available at WikiPathways data repository with the pathway id WP3915.
Molecular biomarkers have been defined as biomarkers that can be discovered using basic and acceptable platforms such as genomics and proteomics. Many genomic and proteomics techniques are available for biomarker discovery and a few techniques that are recently being used can be found on that page. Apart from genomics and proteomics platforms biomarker assay techniques, metabolomics, lipidomics, glycomics, and secretomics are the most commonly used as techniques in identification of biomarkers. Biomarkers can be classified on their clinical applications as molecular biomarkers, cellular biomarkers or imaging biomarkers. Four of the main types of molecular biomarkers are genomic biomarkers, transcriptomic biomarkers, proteomic biomarkers and metabolic biomarkers.
Patterns of protein expression in levitated cultures resemble the patterns observed in-vivo. For example, as shown in the figure on the right, N-cadherin expression in levitated human glioblastoma (GBM) cells was similar to that seen in human tumor xenografts grown in immunodeficient mice (comparing the left and middle images), while standard 2D culture showed much weaker expression that did not match xenograft distribution (comparing the left and right images). The transmembrane protein N-cadherin is often used as an indicator of in-vivo-like tissue assembly in 3D culturing. Referring to the figure, in the mouse and levitated culture (left and middle image), N-cadherin is clearly concentrated in the membrane, and also present in cytoplasm and cell junctions, whereas the 2D system (right image) shows N-cadherin in the cytoplasm and nucleus, but absent from the membrane.
=== Metal generation === Most synthesis routines yield a mixture of different actinide isotopes in oxide forms, from which isotopes of americium can be separated. In a typical procedure, the spent reactor fuel (e.g. MOX fuel) is dissolved in nitric acid, and the bulk of uranium and plutonium is removed using a PUREX-type extraction (Plutonium–URanium EXtraction) with tributyl phosphate in a hydrocarbon. The lanthanides and remaining actinides are then separated from the aqueous residue (raffinate) by a diamide-based extraction, to give, after stripping, a mixture of trivalent actinides and lanthanides. Americium compounds are then selectively extracted using multi-step chromatographic and centrifugation techniques with an appropriate reagent. A large amount of work has been done on the solvent extraction of americium. For example, a 2003 EU-funded project codenamed "EUROPART" studied triazines and other compounds as potential extraction agents. A bis-triazinyl bipyridine complex was proposed in 2009 as such a reagent is highly selective to americium (and curium). Separation of americium from the highly similar curium can be achieved by treating a slurry of their hydroxides in aqueous sodium bicarbonate with ozone, at elevated temperatures. Both Am and Cm are mostly present in solutions in the +3 valence state; whereas curium remains unchanged, americium oxidizes to soluble Am(IV) complexes which can be washed away. Metallic americium is obtained by reduction from its compounds. Americium(III) fluoride was first used for this purpose.
Sources: en.wikipedia.org
It is usually detected by LC-MS or HPLC-UV against a reference standard. In biological matrices, metabolite targeting can improve detection. No universal immunoassay is widely available.
The compound is generally handled as light-sensitive and stored cold and dry. Stability in solution depends on solvent, concentration, and storage time. Specific degradation rates are not fully standardized.
Limited water solubility affects formulation for cell and animal studies. Organic co-solvents are often used to dissolve it. Precipitation can confound assay results if not controlled.
Legality depends on the country and the intended use. In many places it is sold as a research chemical, but sports and medicine regulations restrict it.