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.
Updated 2026-08-01. Numbers and descriptions here follow the published literature rather than marketing material.
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.
SR9009 is frequently discussed in fitness and research-chemical contexts, yet it has no approved medical indication. Regulatory agencies have not authorized it for human use, and it is not a standard prescription drug. Some sports organizations list it as a prohibited substance because of its potential performance-enhancing properties. Published human data are sparse, so claims about its effects in people often rely on animal models or anecdotal reports. Quality and identity of online materials can vary widely.
SR9009 is a synthetic small molecule studied as a REV-ERB agonist. REV-ERBα and REV-ERBβ are nuclear receptors that help regulate circadian rhythms and metabolic gene expression. The compound was identified in academic screening efforts to find synthetic ligands for these receptors. In cell and animal studies, SR9009 alters transcription of genes involved in lipid and glucose metabolism, and it can shift circadian behavior. It is not an approved therapeutic agent.
| 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 |
Scientific discussion of SR9009 often separates animal evidence from human anecdote. Rodent studies provide controlled data on endurance, metabolism, and gene expression, but they use specific strains, doses, and treatment durations. Human reports are mostly uncontrolled and cannot establish cause and effect. Open questions include oral bioavailability, tissue distribution, metabolic stability, and long-term effects. Review articles generally call for more rigorous pharmacokinetic and safety research before any clinical use could be considered.
Analytical methods for SR9009 typically rely on liquid chromatography coupled with tandem mass spectrometry. The technique can separate the parent compound from related substances and detect low concentrations in biological matrices. Urine and blood are common samples in anti-doping testing, while in vitro studies may use cell culture media. Rapid metabolism and low expected concentrations make method validation important for reliable identification. Exact metabolite patterns can vary by species and are not fully mapped.
Regulatory treatment of SR9009 reflects its investigational status. The compound has no approved human therapeutic indication, and sports authorities prohibit its use. It appears on anti-doping lists as a non-approved substance or metabolic modulator, depending on the list version. Products sold online as research chemicals are not quality-controlled medicines, so their identity and purity can differ from the label. Such products may also contain unlisted compounds, which complicates both testing and safety assessment.
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.
The colonies of Queensland and South Australia along with the Northern Territory, where three of the four states of colonial Australia which still had large, yet unknown numbers of Aboriginal people living on Country in regional, remote and very remote locations. From time to time, this made in necessary for laws to be created so Australian’s living within the colony understood their responsibilities to society, and the law was working to ensure protection from potential exploitation, perceived or otherwise. By 1897 the passage of law in all three of the above locations had restricted the sale, exchange or trade of opium with any Aboriginal person without exception, this broad application was required to ensure the law was enforceable. Hardening of Canadian attitudes toward Chinese opium users and fear of a spread of the drug into the white population led to the effective criminalization of opium for nonmedical use in Canada between 1908 and the mid-1920s. In 1909, the International Opium Commission was founded, and by 1914, 34 nations had agreed that the production and importation of opium should be diminished. In 1924, 62 nations participated in a meeting of the commission. Subsequently, this role passed to the League of Nations, and all signatory nations agreed to prohibit the import, sale, distribution, export, and use of all narcotic drugs, except for medical and scientific purposes.
But threats continue to grow as outsiders envy what they have, and Jenna must grapple with how far her faith will allow her to go. As the series opens, Ian has slipped back into a coma, more refugees have gathered outside the gates, and the Homesteaders set up a trading post. The city government has set up their own compound called Raven Rock, with FEMA resources and government operatives. They begin recruiting and arming gang members and thugs from town for an eventual attack on the Homestead. The Homesteaders engage in daily training and drills, including the women, who become experienced with various types of weapons and battle tactics. Tom Reynolds, an engineer and friend of Ian, and his pregnant wife Jacq, a therapist, arrive at the gates and are admitted by Jenna. Abe and Clare's romance buds but they must decide how to reconcile their different worldviews and their loyalties to their parents, who have continued to clash. Georgie, who had been adopted by the Eriksson's six months prior after Jeff found her hiding in a drug den during a DEA raid, is alone in the woods when she sees a man attempt to grab her. Jeff is enraged and decides to retaliate against those they believe to be responsible at the behest of a soldier named Bing, creating more enemies. Bing and an accomplice leave the Homestead and join the city government forces, giving them critical secrets about the Homestead along with a traitor who feeds them information from the inside. Ian's brother Cain, who is also wealthy, arrives via helicopter at Jenna's invitation.
Isinglass ( EYE-zing-gla(h)ss) is a form of collagen obtained from the dried swim bladders of fish. The English word origin is from the obsolete Dutch huizenblaas – huizen is a kind of sturgeon, and blaas is a bladder, or German Hausenblase, meaning essentially the same. The bladders, once removed from the fish, processed, and dried, are formed into various shapes for use. It is used mainly for the clarification or fining of some beer and wine. It can also be cooked into a paste for specialised gluing purposes. Although originally made exclusively from sturgeon, especially beluga, in 1795 an invention by William Murdoch facilitated a cheap substitute using cod. This was extensively used in Britain in place of Russian isinglass, and in the US hake was important. In modern British brewing all commercial isinglass products are blends of material from a limited range of tropical fish.
=== "Original Recipe" and franchising === In July 1940, Sanders finalized what came to be known as his "Original Recipe" of 11 herbs and spices. Although he never publicly revealed the recipe, he said the ingredients included salt and pepper and that the rest "stand on everybody's shelf". After being recommissioned as a Kentucky Colonel in 1950 by Governor Lawrence Wetherby, Sanders began to dress the part, growing a goatee, wearing a black frock coat (later switched to a white suit) and a string tie and referring to himself as "the Colonel". His associates went along with the title change, "jokingly at first and then in earnest", according to biographer Josh Ozersky. In 1952, Sanders franchised his recipe to his friend Pete Harman of South Salt Lake, Utah, the operator of one of the city's largest restaurants. The Sanders Court & Café generally served travelers, so when the route planned in 1955 for Interstate 75 bypassed his properties, Sanders sold them and traveled the US to franchise his recipe to restaurant owners. Independent restaurants would pay four (later five) cents on each chicken as a franchise fee in exchange for Sanders' recipe and the right to feature it on their menus and use his name and likeness for promotional purposes. Don Anderson, a sign painter hired by Harman, coined the name "Kentucky Fried Chicken". For Harman, the addition of KFC was a way of differentiating his restaurant from competitors; a product from Kentucky was exotic and evoked imagery of Southern hospitality.
=== Therapeutics === The small size and stability profile of Affimers combined with their human origin confer drug-like properties. This may represent advantages over antibodies in terms of tissue penetration, for example in solid tumours where Avacta are developing PD-L1 inhibitors as alternatives to Opdivo and Yervoy, though requires half life modification to prevent rapid excretion through the kidney. Affimers can be conjugated to form multimers for the design of therapeutics. Examples include the production of multi-specific Affimer molecules to albumin binders to increase their half-life in vivo and for use as the targeting moiety in chimeric receptors or modified to carry a toxin in Affimer-drug conjugates. Affimers as therapeutics are in discovery and preclinical development to tackle cancer, both via CAR-T cell therapy and as checkpoint inhibitors. Early studies using ex vivo human samples showed low immunogenicity associated with the Affimer scaffold, at levels comparable to a marketed antibody therapeutic. Furthermore, initial preclinical studies showed good efficacy and tolerability of the anti-PDL1 immuno-oncology Affimers in mice. It is anticipated that IND filing for the first Affimer therapeutic will occur in 2023.
Sources: en.wikipedia.org
Given the wide range of bacterial, viral, fungal, protozoal, and helminthic pathogens that cause debilitating and life-threatening illnesses, the ability to quickly identify the cause of infection is important yet often challenging. For example, more than half of cases of encephalitis, a severe illness affecting the brain, remain undiagnosed, despite extensive testing using the standard of care (microbiological culture) and state-of-the-art clinical laboratory methods. Metagenomic sequencing-based diagnostic tests are currently being developed for clinical use and show promise as a sensitive, specific, and rapid way to diagnose infection using a single all-encompassing test. This test is similar to current PCR tests; however, an untargeted whole genome amplification is used rather than primers for a specific infectious agent. This amplification step is followed by next-generation sequencing or third-generation sequencing, alignment comparisons, and taxonomic classification using large databases of thousands of pathogen and commensal reference genomes. Simultaneously, antimicrobial resistance genes within pathogen and plasmid genomes are sequenced and aligned to the taxonomically classified pathogen genomes to generate an antimicrobial resistance profile – analogous to antibiotic sensitivity testing – to facilitate antimicrobial stewardship and allow for the optimization of treatment using the most effective drugs for a patient's infection. Metagenomic sequencing could prove especially useful for diagnosis when the patient is immunocompromised.
=== Lipids === The lipids found in green coffee include: linoleic acid, palmitic acid, oleic acid, stearic acid, arachidic acid, diterpenes, triglycerides, unsaturated long-chain fatty acids, esters, and amides. The total content of lipids in dried green coffee is 11.7–14 g/100 g. Lipids are present on the surface and in the interior matrix of green coffee beans. On the surface, they include derivatives of carboxylic acid-5-hydroxytryptamides with an amide bond to fatty acids (unsaturated C6 to C24) making up to 3% of total lipid content or 1200 to 1400 microgram/g dried green coffee bean. Such compounds form a wax-like cover on the surface of the coffee bean (200–300 mg lipids/100 g dried green coffee bean) protecting the interior matrix against oxidation and insects. Further, such molecules have antioxidative activity due to their chemical structure. Lipids of the interior tissue are triglycerides, linoleic acid (46% of total free lipids), palmitic acid (30% to 35% of total free lipids), and esters. Arabica beans have a higher content of lipids (13.5–17.4 g lipids/100 g dried green coffee beans) than robustas (9.8–10.7 g lipids/100 g dried green coffee beans). The content of diterpenes is about 20% of the lipid fraction. The diterpenes found in green coffee include cafestol, kahweol and 16-O-methylcafestol. Some of these diterpenes have been shown in in vitro experiments to protect liver tissue against chemical oxidation. In coffee oil from green coffee beans the diterpenes are esterified with saturated long chain fatty acids.
NHK, JVC and Ikegami Tsushinki researchers built an early UHDTV prototype, Super Hi‑Vision, which they demonstrated in January 2003. They used an array of 16 HDTV recorders with a total capacity of almost 3.5 TB that could capture up to 18 minutes of test footage. The camera itself was built with four 2.5-inch (64 mm) CCD image sensors, each with a resolution of 3840 × 2048 (4K resolution). Using two CCDs for green and one each for red and blue, they then used a spatial pixel offset method to bring it to 7680 × 4320 (8K resolution). Subsequently, NHK built an improved and more compact system using CMOS image sensor technology and the CMOS image sensor system was demonstrated at Expo 2005, Aichi, Japan, the NAB 2006 and NAB 2007 conferences, Las Vegas, at IBC 2006 and IBC 2008, Amsterdam, Netherlands, and CES 2009. A review of the NAB 2006 demo was published in a broadcast engineering e-newsletter. Individuals at NHK and elsewhere projected that the timeframe for UHDTV to be available in domestic homes varied between 2015 and 2020 but Japan was to get it in the 2016 time frame.
== Structure == Properdin is a gamma globulin protein composed of multiple identical protein subunits with a separate ligand-binding site. Native properdin occurs in head-to-tail dimers, trimers and tetramers in the fixed ratio 22:52:28. Under physiological conditions, properdin forms P2, P3, and P4 in a 26:54:20 ratio by a head-to-tail formation of monomers. The structure is a single-chain molecule made of 469 amino acids, with the leader sequence consisting of 27-amino acids. Every properdin monomer is made of six thrombospondin type 1 repeat (TSR) domains labeled TSR1-6, each including a core of three antiparallel strands with three disulfides, totaling 60 amino acids. Properdin undergoes post-translation through C-mannosylation, O-fucosylation, N-glycosylation, and C-glycosylation.
Irving Langmuir was the first to derive a scientifically based adsorption isotherm in 1918. The model applies to gases adsorbed on solid surfaces. It is a semi-empirical isotherm with a kinetic basis and was derived based on statistical thermodynamics. It is the most common isotherm equation to use due to its simplicity and its ability to fit a variety of adsorption data. It is based on four assumptions:
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.
SR9009 is a synthetic compound investigated as an agonist of the nuclear receptors REV-ERBα and REV-ERBβ. It is used in preclinical research on circadian rhythm and metabolism. It is not an approved drug.