nuclear receptor 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 2026-02-23. Where a claim depends on a specific study, the study is described rather than over-claimed.
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.
At the molecular level, SR9009 binds the ligand-binding domain of REV-ERB and strengthens recruitment of corepressor proteins such as NCoR and HDAC3. This increases repression of target genes, including Bmal1 and other clock-controlled and metabolic genes. In rodent studies, such changes have been linked to altered lipid handling, glucose metabolism, and energy expenditure. The precise chain of events between receptor binding and whole-body effects remains an active area of research. Findings in animals do not automatically translate to humans.
Laboratory studies often administer SR9009 by injection because oral absorption appears poor in rodents. Reported pharmacokinetic properties include rapid metabolism and low systemic exposure after oral dosing. Human pharmacokinetic data are sparse, so absorption, distribution, metabolism, and excretion in people are not well defined. Some research explores related REV-ERB compounds with improved drug-like properties. Regulatory approval for any REV-ERB agonist as a human medicine has not been granted to date.
| Property | Value | Notes |
|---|---|---|
| Chemical class | Synthetic REV-ERB agonist | Binds REV-ERBα and REV-ERBβ in preclinical models |
| Molecular formula | C20H24ClN3O4S | Reported for the parent compound |
| CAS Registry Number | 1379686-30-2 | Common identifier in chemical databases |
| Appearance | Off-white to pale yellow solid | Typical research chemical solid |
| Solubility | Soluble in DMSO and ethanol; low in water | Class: small organic molecule |
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.
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.
SR9009 is frequently discussed alongside other REV-ERB ligands, including synthetic agonists and natural heme-related molecules. Its selectivity for REV-ERB over related nuclear receptors has been measured in binding and reporter assays, though off-target activity at higher concentrations is possible. The compound is prohibited in sport by the World Anti-Doping Agency, and it is not approved for any medical use in major jurisdictions. Products sold online may be labeled as research chemicals, and their identity and purity are not guaranteed by regulatory review.
For long-term storage, SR9009 is typically kept as a solid at low temperature, protected from moisture and light. Desiccated conditions limit hydrolysis, while opaque containers reduce photochemical breakdown. Solutions are less stable than solids and are often stored frozen in aliquots to avoid repeated freeze-thaw cycles. Stability data are not standardized across all suppliers, so users should rely on certificate-of-analysis information when available. Degradation may appear as color change, precipitate, or decreased chromatographic purity.
Laboratory identification of SR9009 typically relies on chromatographic separation coupled to mass spectrometry, often with ultraviolet detection as a secondary check. Nuclear magnetic resonance spectroscopy can confirm molecular structure when a reference standard is available. Because many suppliers sell the compound as a research chemical, independent identity testing is important for experimental reproducibility. A single retention time is not sufficient proof of identity, especially when related compounds may be present. Purity assessments usually report a percentage based on area normalization.
Storage recommendations for SR9009 reference material typically specify a freezer at -20 °C or lower, with protection from moisture and light. Repeated freeze-thaw cycles can degrade small molecules and introduce variability. Stock solutions in dimethyl sulfoxide are often aliquoted to avoid repeated handling. Stability studies may examine degradation under heat, humidity, and light exposure. The compound's thiophene and nitro groups can participate in reactions that alter analytical signals over time, so such changes affect quantitative results.
Quality control for research materials includes identity confirmation by nuclear magnetic resonance and purity assessment by high-performance liquid chromatography. Mass spectrometry provides molecular weight confirmation and can detect related impurities. Purchasers should request a certificate of analysis that lists lot-specific data. Online products advertised for human use often lack such documentation. Distinguishing legitimate research material from mislabeled or contaminated samples is a recurring challenge in independent testing, and independent laboratories may use orthogonal methods to verify identity.
==== M ==== Dried mangoes – the fruit of the mango tree can be dried. The Philippines produces and exports dried mangoes. India popularly produces 'amchur' or dry mango as whole or powder, popularly used in pickles and masala.
On 22 December 1988, the Brazzaville Protocol was enshrined in the Tripartite Accord, which required the SADF to withdraw from Angola and reduce its troop levels in South West Africa to a token force of 1,500 within twelve weeks. Simultaneously, all Cuban brigades would be withdrawn from the border to an area north of the 15th parallel. At least 3,000 Cuban military personnel would depart Angola by April 1989, with another 25,000 leaving within the next six months. The remaining troops would depart at a date not later than 1 July 1991. An additional condition was that South Africa would cease all support for UNITA, and Angola likewise for PLAN and MK. On 20 December 1988, United Nations Security Council Resolution 626 was passed, creating the United Nations Angola Verification Mission (UNAVEM) to verify the redeployment northwards and subsequent withdrawal of the Cuban forces from Angola. UNAVEM included observers from Western as well as non-aligned and communist nations. In February 1989 the United Nations Transition Assistance Group (UNTAG) was formed to monitor the South West African peace process.
nonsense suppressor A factor which can inhibit the effects of a nonsense mutation (i.e. a premature stop codon) by any mechanism, usually either a mutated transfer RNA which can bind the mutated stop codon or some kind of ribosomal mutation.
In Type 1 diabetics hyperglycemia due to the dawn phenomenon can persist despite adequate insulin compensation overnight, while in Type 2 diabetics the dawn phenomenon has been shown to be resistant to treatment with both oral medications and diet modifications. An "extended" dawn phenomenon has also been observed in which the abnormal increase in blood glucose levels continues after breakfast. This prolonged duration is thought to be caused by the compounding effects of absorbing and metabolizing breakfast carbohydrates during this period. Both the dawn phenomenon and its extended period have been shown to be significantly more difficult to control when a patient's HbA1c is greater than 7%.
Sources: en.wikipedia.org
=== PE Applied Biosystems === In September 1995, Tony L. White from Baxter International Inc. became president and chief executive officer of Perkin-Elmer. In 1996 the company was reorganized into two separate operating divisions, Analytical Instruments and PE Applied Biosystems. The PE Applied Biosystems division accounted for half of Perkin-Elmer's total revenue, with net revenues up by 26%. In 1997, revenues reached almost US$1.3 billion, of which PE Applied Biosystems was US$653 million. The company acquired GenScope, Inc., and Linkage Genetics, Inc. The Linkage Genetics unit was combined with Zoogen to form PE AgGen, focused on genetic analysis services for plant and animal breeding. The PE Applied Biosystems division partnered with Hyseq, Inc., for work on the new DNA chip technology, and also worked with Tecan U.S., Inc., on combinatorial chemistry automation systems, and also with Molecular Informatics, Inc. on genetic data management and analysis automated systems.
== Cultivars == Over 80 varieties and cultivars have gained the Royal Horticultural Society's Award of Garden Merit. In the Atragene group are woody deciduous climbers with bell-shaped flowers in spring, produced on the last year's growth. These include 'Markham's Pink', a pale pink breed. In the early large-flowered group, which flower on the last year's growth, are:
decay channel, which is more difficult to detect in water Cherenkov detectors because the antineutrino leaves the detector undisturbed and the kaon momentum is below the Cherenkov-light production threshold in water. The process can be identified by detecting the muons produced by kaon decays at rest, as well as the gamma rays emitted when a nucleon decays within the oxygen nucleus. The nucleus may remain in an excited state following this decay, from which it rapidly relaxes by emitting gamma rays. Other processes can enable experiments to test the baryon number conservation, such as neutron-antineutron oscillations and specific nucleon–antinucleon conversion processes, accessible through electron–deuteron scattering.
==== Emulsions ==== Emulsions are mixtures of immiscible liquids. Water-in-oil emulsions of estradiol benzoate were evaluated as long-acting preparations for use by intramuscular injection in the 1940s and 1950s. Formulations of estradiol benzoate alone under the brand name Menformon-Emulsion and with progesterone under the brand name Di-Pro-Emulsion were previously marketed. A 10 mg dose of estradiol benzoate in emulsion by intramuscular injection is said to have a duration of about 2 to 3 weeks. This is similar to the duration of an aqueous suspension of 10 mg estradiol benzoate or an oil solution of 10 mg estradiol valerate. Emulsions of steroids by intramuscular injection have similar properties (e.g., duration) relative to aqueous suspensions. Painful injection site reactions have been reported with emulsions similarly to suspensions.
An airport road was paved over the Jewish cemetery in Damascus, and Jewish schools were closed and handed over to Muslims. The Jewish Quarter of Damascus was under constant surveillance by the secret police, who were present at synagogue services, weddings, bar mitzvahs, and other Jewish gatherings. The secret police closely monitored contact between Syrian Jews and foreigners and kept a file on every member of the Jewish community. Jews also had their phones tapped and their mail read by the secret police. After Israel's victory in the 1967 Six-Day War, restrictions were further tightened, and 57 Jews in Qamishli may have been killed in a pogrom. The communities of Damascus, Aleppo, and Qamishli were under house arrest for eight months following the war. Many Jewish workers were laid off following the Six-Day War. After purging rival Baathist factions through a coup in 1970, Hafez al-Assad established total dominance over the Ba'ath party and established a dictatorship centered around his personality cult. Structure of Assad's police state revolved around the Ba'ath party organization, Syrian military establishment packed with Ba'athist elites and Assad family's Alawite loyalists. Hafez ruled Syria for three decades, deploying repressive measures ranging from censorship to violent methods of state terror such as mass murders, deportations and practices such as torture, which were unleashed collectively upon the civilian population.
Sources: en.wikipedia.org
== Mechanisms == LEDs are the most utilized optical semiconductor devices that transform electrical energy into light energy. LED therapy utilizes light-emitting diodes to deliver treatments based on mechanisms such as photodynamic Therapy (PDT) and photobiomodulation (PBMT). PDT targets and destroys diseased cells, while PBMT stimulates cellular repair and reduces inflammation. The effectiveness of LED therapy varies with the wavelength of light, allowing for diverse applications in healing, dermatology, and cancer treatment.
Air-blast freezing is the oldest and cheapest approach. Food is placed into freezing rooms where the air is cold. Air is either forced ("blasted") onto the food or left static. This setup allows large chunks of food (usually meat or fish) to be more easily processed compared to other methods, but is quite slow. Belt freezers simply put a conveyor belt inside a cold room. Tunnel freezing is a variant of air-blast freezing where food is put onto trolley racks and sent into a tunnel where cold air is continuously circulated. Fluidized bed freezing is a variant of air-blast freezing where pelletized food is blown by fast-moving cold air from below, forming a fluidized bed. The small size of the food combined with the fast-flowing air provides good heat transfer and therefore quicker freezing. Contact freezing uses physical contact other than air to transfer the heat. Direct contact freezing puts the product directly in contact with the refrigerant, while indirect contact freezing uses a plate in between. Plate freezing is the most common form of contact freezing. Food is put between cold metal plates and then lightly pressed to maintain contact. Contact belt freezing combines a conveyor belt with plate freezing. It is usually used for fruit pulps, egg yolk, sauces and soups. Immersion freezing dips the product into a cold refrigerant liquid to freeze it, usually on a conveyor belt. The product may be in direct contact with the liquid, or be separated by a membrane. It can be used for freezing the outer shell of large particles to reduce water loss.
The production was held at the Eugene O'Neill Theatre in New York City to raise money for the American Foundation for Equal Rights. Freeman had a lead role in the 2012 drama The Magic of Belle Isle, as an alcoholic novelist trying to write again. The film fared poorly with critics, gaining only a 29% approval rating on Rotten Tomatoes. Lastly in 2012, Freeman reprised his role as Lucius Fox for the third time in The Dark Knight Rises. A number of box office hits were released in 2013. Freeman appeared in the action-thriller Olympus Has Fallen, the first installment in what would become the Has Fallen film series; he portrays Speaker of the House Allan Trumbull. The San Francisco Chronicle critic gave Olympus Has Fallen 3 out of 4 stars and opined that Freeman gave an amicable supporting performance. He then starred in the science fiction drama Oblivion, with co-star Tom Cruise, as veteran soldier Malcolm Beech, and appeared in the thriller Now You See Me, as an ex-magician. Lastly, he played a retiree in Last Vegas, with co-stars Michael Douglas, Robert De Niro, Kevin Kline, and Mary Steenburgen. Filmed in Las Vegas and Atlanta, Last Vegas was praised for its cast's chemistry, and one critic thought Freeman brought the most amusement. In 2014, Freeman voiced the character Vitruvius in The Lego Movie, a commercially successful 3D animation. He starred in Transcendence, a science fiction thriller directed by Wally Pfister in his directorial debut, in which Freeman plays scientist Joseph Tagger. Critic reviews of the film were generally mixed, according to Metacritic.
==== GSK–Novartis consumer healthcare buy-out ==== In March 2018, GSK announced that it has reached an agreement with Novartis to acquire Novartis's 36.5% stake in their Consumer Healthcare Joint Venture for US$13 billion (£9.2 billion).
Sources: en.wikipedia.org
SR9009 is a synthetic small molecule studied as an agonist of the REV-ERB nuclear receptors. It is not an approved medicine, and its effects in humans are not well characterized.
No. It is a synthetic ligand that binds nuclear receptors, not a steroid or peptide hormone. Its activity depends on receptor binding rather than endocrine secretion.
Clinical evidence is limited. Most published data come from cell and animal experiments. Human safety and efficacy remain uncertain.
SR9009 is a synthetic research compound that activates the REV-ERBα and REV-ERBβ nuclear receptors. It is not an approved drug and has no established human therapeutic use. Most published biological data come from cell and rodent studies.