REV-ERB is one of those subjects where the details matter more than the headlines. This page pulls together the background, the mechanisms, and the practical points readers ask about most.
Last reviewed on 2025-12-16. Where a claim depends on a specific study, the study is described rather than over-claimed.
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.
SR9009 is a synthetic small molecule studied as an agonist of REV-ERB nuclear receptors. REV-ERB alpha and REV-ERB beta help regulate circadian rhythms and metabolic gene expression. In laboratory research, SR9009 has been used to probe how these receptors affect skeletal muscle, liver, and adipose tissue. The compound was identified in academic drug-discovery work and is often described in scientific literature by its chemical name and research code. It is not an approved medicine, and human clinical data remain limited or absent.
SR9009 binds REV-ERB receptors and alters their repressive activity on target genes. This action can change transcription of genes involved in lipid handling, glucose metabolism, and mitochondrial function. In rodent studies, treated animals have shown changes in muscle oxidative capacity and exercise performance, though effects vary by dose, duration, and model. The precise molecular steps connecting receptor binding to whole-body outcomes are still an active area of investigation. Findings in animals do not automatically translate to humans.
| Property | Value | Notes |
|---|---|---|
| Regulatory status | Not approved for human use | Investigational status in most countries |
| Sports status | Prohibited by WADA | Classified as non-approved or metabolic modulator |
| Common analytical method | LC-MS/MS | Used for trace detection in biological samples |
| Typical test matrices | Urine and blood | Sample choice depends on testing program |
| Human trial data | None published | Effects and safety are not established |
In rodent studies, SR9009 has been reported to increase mitochondrial content in skeletal muscle and improve exercise endurance under some conditions. These findings led to popular descriptions such as an exercise mimetic, although that term oversimplifies the biology. Effects vary by dose, timing, tissue, and model. The compound's influence on circadian pathways means that time of administration can matter in experiments. Whether similar metabolic changes occur in humans remains largely unexplored in controlled published trials.
Pharmacokinetic data for SR9009 are limited in published literature. Some reports indicate low oral bioavailability and rapid clearance in animals, which complicates interpretation of exposure and effect. Researchers often use injected routes in preclinical work to achieve measurable systemic levels. Analytical studies rely on mass spectrometry to detect the parent compound and its metabolites. Questions about tissue distribution, active metabolites, and long-term consequences remain open. Species differences in metabolism can affect observed half-life and target engagement.
The mechanism of action involves binding to REV-ERB receptors and recruiting corepressor complexes, which represses target gene transcription. This contrasts with many nuclear receptor agonists that activate transcription. Downstream effects may include changes in autophagy, mitochondrial biogenesis, and lipid handling, but the precise pathways remain an active area of study. Whether these molecular events translate into meaningful physiological effects in humans is unresolved. Most evidence comes from cultured cells and rodent models rather than human participants.
SR9009 is a synthetic small molecule developed as an agonist of the nuclear receptors REV-ERBα (NR1D1) and REV-ERBβ (NR1D2). These receptors help regulate circadian rhythms and metabolic gene expression. In cell and animal studies, SR9009 alters transcription of genes involved in lipid metabolism, inflammation, and mitochondrial function. It is not an approved medicine, and its pharmacological profile in humans remains largely uncharacterized. The compound is frequently discussed in the context of circadian biology and metabolic research rather than clinical use.
Preclinical reports have linked SR9009 to improved endurance and altered energy expenditure in rodents. Such findings have prompted interest in whether REV-ERB activation can influence skeletal muscle metabolism. However, the reported effects depend on dose, route, and experimental model, and replication across laboratories is limited. Human trials have not established comparable outcomes, so claims about exercise performance remain speculative. The absence of controlled human data is a central limitation in interpreting these observations.
This process involves the strategic addition of second-phase particles within a ceramic matrix, optimizing their shape, size, and distribution to direct and control crack propagation. This approach enhances fracture toughness, paving the way for the creation of advanced, high-performance ceramics in various industries.
Maggot therapy improves healing in chronic ulcers. In diabetic foot ulcers there is tentative evidence of benefit. A Cochrane review of methods for the debridement of venous leg ulcers found maggot therapy to be broadly as effective as most other methods, but the study also noted that the quality of data was poor. In 2003, the United States Food and Drug Administration (FDA) cleared maggots from the common green bottle fly for use as a "medical device" in the US for the purpose of treatment of:
=== Further medieval development === The Fisher King's next development occurred around the end of the 12th century in Robert de Boron's Joseph d'Arimathie, the first work to connect the Grail with Jesus. Here, the "Rich Fisher" is called Bron, a name similar enough to Bran to suggest a relationship, and said to be the brother-in-law of Joseph of Arimathea, who had used the Grail to catch Christ's blood before laying him in the sepulchre. Joseph founds a religious community that travels eventually to Britain and entrusts the Grail to Bron (who is called the "Rich Fisher" because he catches a fish eaten at the Grail table). Bron founds the line of Grail keepers that eventually includes Perceval. The Lancelot-Grail (Vulgate) prose cycle includes a more elaborate history of the Fisher King. Many in his line are wounded for their failings, beginning with his ancestor Alain (the "Rich Fisherman"), and the only two that survived till the Grail Quest are the Maimed King, named Pellehan (Pellean, Pelleam, Pellehem), and the Fisher King, his son Pelles. The Vulgate Merlin Continuation further features besides his father, unnamed there, a brother of Pelles also named Alain, and in one variant also their brother and their cousin both named Pellinor, all featuring as Grail Kings of the Fisher and/or Maimed kind. Pelles engineers the birth of Galahad by tricking Lancelot into bed with his daughter Elaine, and it is prophesied that Galahad will achieve the Grail and heal the Wasteland and the Maimed King.
Sources: en.wikipedia.org
== Natural genetic transformation == Natural genetic transformation in bacteria is a sexual process involving the transfer of DNA from one cell to another through the intervening medium, and the integration of the donor sequence into the recipient genome by homologous recombination. A. tumefaciens can undergo natural transformation in soil without any specific physical or chemical treatment.
Shot noise is a type of electronic noise that occurs when the finite number of particles (such as electrons in an electronic circuit or photons in an optical device) is small enough to give rise to statistical fluctuations in a signal. Shot noise is a Poisson process, and the charge carriers that make up the current follow a Poisson distribution. The root mean square current fluctuation is given by
== Nutrition == A raw shallot contains 80% water, 17% carbohydrates, 2.5% protein and a negligible amount of fat (table). In a reference amount of 100 grams (3.5 oz), raw shallot supplies 72 calories and is a rich source of vitamin B6 (20% of the Daily Value, DV), while providing moderate amounts of manganese (13% DV) and potassium (11% DV). No other micronutrients occur in significant amounts (below 10% DV, table).
In a scientific research study or clinical trial, a flaw in the study design or the method of collecting or interpreting information. Biases can lead to incorrect conclusions about what the study or clinical trial showed. (NCI) When a point of view prevents impartial judgment on issues relating to the subject of that point of view. In clinical studies, bias is controlled by blinding and randomization (NLM) The systematic tendency of any factors associated with the design, conduct, analysis and evaluation of the results of a clinical trial to make the estimate of a treatment effect deviate from its true value. Bias introduced through deviations in conduct is referred to as 'operational' bias. The other sources of bias listed above are referred to as 'statistical'. (ICH E9) Bioavailable
Sources: en.wikipedia.org
=== 1990s === In the fall of 1990, Kidder appeared as a singer who becomes a murder victim in the Canadian television film White Room (1990). After her car accident, Kidder returned to the screen with an uncredited cameo appearance in the comedy film Delirious (1991), appearing as a woman in a washroom. This was followed by a role as a psychic in To Catch a Killer (1992), a Canadian television thriller film based on the crimes of John Wayne Gacy. She had several small roles in 1994, including in the Disney Channel film Windrunner, as well as another uncredited appearance in Maverick. She played a bartender at the Broken Skull Tavern in Under a Killing Moon, a PC FMV adventure game. Kidder returned to film with a lead role in the independent comedy-drama Never Met Picasso (1997), portraying an actress living with her gay adult son (portrayed by Alexis Arquette), who is attempting to sort his life out. Kevin Thomas of the Los Angeles Times wrote, "Arquette and Kidder [were] given the chance to come across as quite appealing" in their roles. She next appeared in the slasher film The Clown at Midnight (1998), opposite Christopher Plummer, and alongside Lynn Redgrave and James Earl Jones in the romance film The Annihilation of Fish (1999), playing the landlady of an interracial couple. Critic Todd McCarthy in Variety referred to the film as a "would-be charmer" and "a drear moment in the careers of all concerned."
==== Half-Life 2: Lost Coast (2005) and Team Fortress 2 (2007) ==== Antonov worked on Half-Life 2: Lost Coast, an additional level for Half-Life 2 released in 2005 as a free download for owners of the game. His last credit at Valve was for the online multiplayer FPS Team Fortress 2 (2007), temporarily working as its art director until his friend Moby Francke joined the company, at which point Antonov handed the role to him. Antonov left the company in 2006. He later explained that he was disappointed he had "spent six years of my life on one single project", and he did not care to work on small-scale episodic games, which Valve made with Half-Life 2: Episode One (2006) and Episode Two (2007). He wanted to make more "AAA" games like the original Half-Life 2, at a job in Europe which gave more artistic independence and "maneuverability" than Valve.
=== Reverse CAMP === The reverse CAMP test utilizes the synergetic hemolytic abilities of the CAMP factor produced by Streptococcus agalactiae with the α-toxin produced by Clostridium perfringens. Streaking these two organisms perpendicular to each other on a blood agar plate will yield a "bow-tie" clearing of the blood agar by the hemolytic capabilities of the two organisms' toxins. Incubation requires 24 hours at 37 °C.
Although showing fermentation resulted from the action of living microorganisms was a breakthrough, it did not explain the basic nature of fermentation; nor did it prove it is caused by microorganisms which appear to be always present. Many scientists, including Pasteur, had unsuccessfully attempted to extract the fermentation enzyme from yeast. Success came in 1897 when the German chemist Eduard Buechner ground up yeast, extracted a juice from them, then found to his amazement this "dead" liquid would ferment a sugar solution, forming carbon dioxide and alcohol much like living yeasts. Buechner's results are considered to mark the birth of biochemistry. The "unorganized ferments" behaved just like the organized ones. From that time on, the term enzyme came to be applied to all ferments. It was then understood fermentation is caused by enzymes produced by microorganisms. In 1907, Buechner won the Nobel Prize in chemistry for his work. Advances in microbiology and fermentation technology have continued steadily up until the present. For example, in the 1930s, it was discovered microorganisms could be mutated with physical and chemical treatments to be higher-yielding, faster-growing, tolerant of less oxygen, and able to use a more concentrated medium.
There are five main types of experimental data that are used for the determination of solution equilibrium constants. Potentiometric data obtained with a glass electrode are the most widely used with aqueous solutions. The others are Spectrophotometric, Fluorescence (luminescence) measurements and NMR chemical shift measurements; simultaneous measurement of K and ΔH for 1:1 adducts in biological systems is routinely carried out using Isothermal Titration Calorimetry. The experimental data will comprise a set of data points. At the i'th data point, the analytical concentrations of the reactants, TA(i), TB(i) etc. will be experimentally known quantities and there will be one or more measured quantities, yi, that depend in some way on the analytical concentrations and equilibrium constants. A general computational procedure has three main components.
Sources: en.wikipedia.org
No. It is an investigational compound without approved therapeutic indications. It is sold for research purposes only in many jurisdictions.
Sports authorities prohibit it because it is not approved for human use and has potential performance-enhancing effects. It appears on anti-doping lists under non-approved or metabolic modulator categories.
Detection usually uses liquid chromatography-tandem mass spectrometry. The method targets the parent compound or its metabolites in urine or blood.
SR9009 is a synthetic research compound that acts on REV-ERB nuclear receptors. It is not approved for human use and is sold only as a research chemical. Its effects have been studied mainly in cells and rodents.