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.
Updated 2025-08-08. Numbers and descriptions here follow the published literature rather than marketing material.
SR9009 is not approved as a medicine by major regulatory agencies. It is commonly sold as a research chemical, a category that may fall outside customary drug approval and quality rules. In sports, the World Anti-Doping Agency lists SR9009 as a prohibited substance. Athletes who use it can face sanctions if it is detected in a sample. Legal status varies by country, and importation may be restricted. Enforcement practices differ across borders.
Detection of SR9009 in biological samples usually employs liquid chromatography coupled with tandem mass spectrometry. This method can identify the parent compound and sometimes metabolites in urine or blood. Because exposure can be low and clearance may be rapid, sample timing and limits of detection matter. Laboratories validate assays for sensitivity and specificity. Results are interpreted alongside chain-of-custody and quality-control records. Urine is the common matrix for anti-doping analysis, while blood may be used in research settings.
SR9009 is a synthetic small molecule that acts on the nuclear receptors REV-ERBα and REV-ERBβ. These receptors are part of the circadian clock machinery and normally repress transcription of certain target genes. In laboratory research, SR9009 is used as a chemical tool to study how REV-ERB activity influences metabolism, inflammation, and daily biological rhythms. The compound is not an approved medicine, and its effects in humans remain largely uncharacterized. It is often described as an investigational agent rather than a therapeutic product.
REV-ERB proteins typically suppress gene expression by recruiting corepressor complexes to DNA response elements. SR9009 binds these receptors and strengthens that repressive action in cell-based assays. Studies in rodents have reported changes in lipid handling, mitochondrial function, and exercise capacity after treatment. Such findings are often cited as evidence for metabolic effects, but species differences and limited pharmacokinetic data make direct translation to humans uncertain. Researchers continue to examine which effects are robust and which depend on specific experimental conditions.
| Property | Value | Notes |
|---|---|---|
| Regulatory status | Not approved as a medicine in major jurisdictions | Sold as a research chemical; legal status varies |
| Anti-doping status | Prohibited by the World Anti-Doping Agency | Listed under non-approved substances or related category |
| Typical analytical method | LC-MS/MS | Used for detection and confirmation in biological samples |
| Storage temperature | −20 °C or lower for solid | Desiccated and protected from light |
| Common solution solvents | DMSO; ethanol | Aqueous solubility is limited |
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 and metabolic gene expression. In laboratory experiments, SR9009 binds these receptors and alters transcription of genes involved in lipid handling, glucose metabolism, and mitochondrial function. It is not a naturally occurring compound and has no approved therapeutic use. Research interest stems from its ability to modify energy metabolism in cells and animal models.
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.
Analytical identification and purity assessment often use high-performance liquid chromatography with ultraviolet detection or mass spectrometry. Liquid chromatography–tandem mass spectrometry is used to detect and quantify SR9009 in biological matrices, including urine and blood, for anti-doping or pharmacokinetic studies. Nuclear magnetic resonance spectroscopy can confirm molecular structure. Stability depends on form and storage: the solid is generally more stable than solutions, and repeated freeze–thaw cycles may degrade samples. Purity is typically reported as a percentage from a certificate of analysis.
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.
Occurs at rest or minimal exertion and usually lasts more than 20 minutes (if nitroglycerin is not administered) Being severe (at least Canadian Cardiovascular Society Classification 3) and of new onset (i.e. within 1 month) Occurs with a crescendo pattern (brought on by less activity, more severe, more prolonged or increased frequency than previously). Fifty percent of people with unstable angina will have evidence of necrosis of the heart's muscular cells based on elevated cardiac serum markers such as creatine kinase isoenzyme (CK)-MB and troponin T or troponin I, and thus have a diagnosis of non-ST elevation myocardial infarction.
In Latin America, money laundering is mainly linked to drug trafficking activities and to having connections with criminal activity, such as crimes that have to do with arms trafficking, human trafficking, extortion, blackmail, smuggling, and acts of corruption of people linked to governments, such as bribery, which are more common in Latin American countries. There is a relationship between corruption and money laundering in developing countries. The economic power of Latin America increases rapidly and without support, these fortunes being of illicit origin having the appearance of legally acquired profits. With regard to money laundering, the ultimate goal of the process is to integrate illicit capital into the general economy and transform it into licit goods and services. The money laundering practice uses various channels to legalize everything achieved through illegal practices. As such, it has different techniques depending on the country where this illegal operation is going to be carried out:
Hemoglobin Lepore syndrome is typically an asymptomatic hemoglobinopathy, which is caused by an autosomal recessive genetic mutation. The Hb Lepore variant, consisting of two normal alpha globin chains (HBA) and two delta-beta globin fusion chains which occurs due to a "crossover" between the delta (HBD) and beta globin (HBB) gene loci during meiosis and was first identified in the Lepore family, an Italian-American family, in 1958. There are three varieties of Hb Lepore, Washington (Hb Lepore Washington, AKA Hb Lepore Boston or Hb Lepore Washington-Boston), Baltimore (Hb Lepore Baltimore) and Hollandia (Hb Hollandia). All three varieties show similar electrophoretic and chromatographic properties and hematological findings bear close resemblance to those of the beta-thalassemia trait; a blood disorder that reduces the production of the iron-containing protein hemoglobin which carries oxygen to cells and which may cause anemia. The homozygous state for Hb Lepore is rare. Patients of Balkan descent tend to have the most severe presentation of symptoms including severe anemia during the first five years of life. They also presented with significant splenomegaly, hepatomegaly, and skeletal abnormalities identical to those of homozygous beta-thalassemia. The amount of Hb Lepore in the patients blood ranged from 8 to 30%, the remainder being fetal hemoglobin (Hb F) which is present in minute quantities (typically<1 percent) in the red blood cells of adults. Known as F- cells they are present in a small proportion of overall RBCs.
Sources: en.wikipedia.org
=== 1986 analysis === Roy Mackal, a biochemist at the University of Chicago and a founding member of the International Society of Cryptozoology (as was F. G. Wood), decided to test the samples himself. In an issue of Cryptozoology in 1986, he wrote, "Gennaro carried out comparative histological examination of the tissue, and concluded that it most resembled contemporary octopus tissue. While these results were highly suggestive, further biochemical work was required for an unambiguous identification of the tissue." Mackal tested samples of the St. Augustine carcass for different amino acids and compared the results with the known amino acid composition of the tissues of a spotted dolphin, a beluga, a giant squid, and two species of octopus.
The exact mass of many isotopes was measured leading to the result that hydrogen has a 1% higher mass than expected by the average mass of the other elements. Aston speculated about the subatomic energy and the use of it in 1936. In 1918, Arthur Jeffrey Dempster reported on his mass spectrometer and established the basic theory and design of mass spectrometers that is still used to this day. Dempster's research over his career centered around the mass spectrometer and its applications, leading in 1935 to his discovery of the uranium isotope 235U. This isotope's ability to cause a rapidly expanding fission nuclear chain reaction allowed the development of the atom bomb and nuclear power. In 1932, Kenneth Bainbridge developed a mass spectrometer with a resolving power of 600 and a relative precision of one part in 10,000. He used this instrument to verify the equivalence of mass and energy, E = mc2.
=== Regulation of respiration === Carbon dioxide is one of the mediators of local autoregulation of blood supply. If its concentration is high, the capillaries expand to allow a greater blood flow to that tissue. Bicarbonate ions are crucial for regulating blood pH. A person's breathing rate influences the level of CO2 in their blood. Breathing that is too slow or shallow causes respiratory acidosis, while breathing that is too rapid leads to hyperventilation, which can cause respiratory alkalosis. Although the body requires oxygen for metabolism, low oxygen levels normally do not stimulate breathing. Rather, breathing is stimulated by higher carbon dioxide levels. As a result, breathing low-pressure air or a gas mixture with no oxygen at all (such as pure nitrogen) can lead to loss of consciousness without ever experiencing air hunger. This is especially perilous for high-altitude fighter pilots. It is also why flight attendants instruct passengers, in case of loss of cabin pressure, to apply the oxygen mask to themselves first before helping others; otherwise, one risks losing consciousness. The respiratory centers try to maintain an arterial CO2 pressure of 40 mmHg. With intentional hyperventilation, the CO2 content of arterial blood may be lowered to 10–20 mmHg (the oxygen content of the blood is little affected), and the respiratory drive is diminished. This is why one can hold one's breath longer after hyperventilating than without hyperventilating.
Sources: en.wikipedia.org
==== EU ==== In the European Union, edible insects – whole or in parts, e.g., legs, wings, or heads – fall within the definition of novel food, given by the European Commission. Dossiers for several insect species are currently under review by the European Food Safety Authority (EFSA). In August 2018, the EFSA published a first risk profile for the house cricket as food. According to a risk assessment published by EFSA on 13 January 2021, the yellow mealworm is safe for human consumption. On 2 July 2021, EFSA published another scientific opinion stating that migratory locust in frozen, dried or ground state is safe for human consumption. On 17 August 2021, EFSA published a safety assessment with view to house crickets (Acheta domesticus) stating that frozen and dried formulations from whole house crickets are safe for consumption. On 4 July 2022, EFSA published an opinion confirming the safety of frozen and freeze-dried formulations of the lesser mealworm (Alphitobius diaperinus in larval state) for human consumption. Following EFSA's assessment, the European Commission has authorized the following edible insects as novel food in the EU:
Elexacaftor/tezacaftor/ivacaftor, sold under the brand names Trikafta and Kaftrio, is a fixed-dose combination medication used to treat cystic fibrosis. Elexacaftor/tezacaftor/ivacaftor is composed of a combination of ivacaftor, a chloride channel opener, and elexacaftor and tezacaftor, CFTR modulators. The combination is approved for medical use in the United States for people aged two years of age and older who have cystic fibrosis with a F508del mutation or other mutations in the CFTR gene. It is also approved for use in Canada, the European Union, and Australia. The combination is on the World Health Organization's List of Essential Medicines.
==== 200–299 ==== Local Authorities (Standing Orders) Regulations 1993 (S.I. 1993/202) Furniture and Furnishings (Fire) (Safety) (Amendment) Regulations 1993 (S.I. 1993/207) Coal and Other Safety-Lamp Mines (Explosives) Regulations 1993 (S.I. 1993/208) Poultry Meat (Hygiene) (Amendment) Regulations 1993 (S.I. 1993/209) Liverpool Housing Action Trust (Area and Constitution) Order 1993 Approved by both Houses of Parliament S.I. 1993/210) Education (Designated Institutions in Further Education) (Wales) Order 1993 (S.I. 1993/215) Non-Domestic Rates (Scotland) Order 1993 (S.I. 1993/216) Superannuation (Children's Pensions) (Earnings Limit) Order 1993 (S.I. 1993/220) Insolvency Practitioners (Amendment) Regulations 1993 (S.I. 1993/221) Taxes (Interest Rate) (Amendment) Regulations 1993 (S.I. 1993/222) Drainage Rates (Forms) Regulations 1993 (S.I. 1993/223) Foreign Compensation (Financial Provisions) Order 1993 (S.I. 1993/224) Aircraft and Shipbuilding Industries (Repeals) (Northern Ireland) Order 1992 S.I. 1993/225) District Electoral Areas (Northern Ireland) Order 1993 (S.I. 1993/226) Parliamentary Constituencies (Wales) (Miscellaneous Changes) Order 1993 (S.I. 1993/227) Academic Awards and Distinctions (Queen Margaret College) (Scotland) Order of Council 1993 (S.I. 1993/230) Air Navigation (Third Amendment) Order 1993 (S.I. 1993/231) Local Government Finance Act 1992 (Community Charge Benefit) Savings and Transitional Order 1993 (S.I. 1993/232) Funds for Trade Union Ballots Regulations (Revocation) Regulations 1993 (S.I.
== Production == Lithium carbonate is made from primarily two sources: spodumene and petalite ores, and underground brine pools. About 82,000 tons were produced in 2020, showing significant and consistent growth.
Sources: en.wikipedia.org
Its legal status depends on the country and intended use. It is not an approved medicine in major jurisdictions. In sport, it is prohibited by anti-doping rules.
Laboratories typically use LC-MS/MS to detect SR9009 and related compounds in urine or blood. The method is sensitive but depends on sample collection timing. Confirmatory analysis follows quality-control procedures.
Solid material is generally kept cold, dry, and protected from light. Solutions are often stored in sealed containers at low temperature. Stability beyond recommended periods is not well documented.
SR9009 is a synthetic research compound that binds and modulates the nuclear receptors REV-ERBα and REV-ERBβ. It is used in laboratory studies of circadian biology and metabolism, not as an approved medicine. It is also known by the informal name Stenabolic.