The short version of reference standard fits in a sentence. The long version — which is the one that helps — is below.
Reviewed 2025-11-30. Anything still debated is marked as such rather than presented as settled.
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.
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.
At the molecular level, SR9009 binds REV-ERBα and REV-ERBβ and alters their repressive activity on target genes. These nuclear receptors help regulate the circadian clock, lipid synthesis, glucose metabolism, and inflammatory pathways. By changing transcription, the compound can shift the timing or magnitude of downstream metabolic processes in model systems. It does not act through androgen receptors or adenosine receptors, which distinguishes it from several substances sold for athletic performance. Whether the same transcriptional changes occur in humans at tolerable exposures remains an open question because controlled human studies are lacking.
Preclinical reports describe effects on exercise endurance, mitochondrial content, and lipid profiles in rodents, but these findings come from specific experimental conditions. Many studies use high doses or delivery methods that may not translate directly to human use. SR9009 has been reported to have low oral bioavailability and a short half-life, which complicates interpretation of oral dosing studies. It is not established as safe or effective for any indication. Literature discussions often separate its pharmacological mechanism from unverified claims made in fitness and supplement markets.
| Property | Value | Notes |
|---|---|---|
| Common name | SR9009 | Also marketed informally as Stenabolic |
| Chemical class | Synthetic REV-ERB agonist | Binds REV-ERBα and REV-ERBβ |
| Molecular formula | C24H30ClN3O4S | Approximate molecular weight 492 g/mol |
| CAS Registry Number | 1379686-30-2 | Identifier for the parent compound |
| Regulatory status | Not approved for human use | Prohibited in sport by WADA |
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.
== Medicine and biology == Cell proliferation, cell growth and division Proliferation, a phase of wound healing Atypical small acinar proliferation, a concept in urologic pathology Intravenous atypical vascular proliferation, a skin condition Massive periretinal proliferation, a disease of the eye
At WrestleMania 13, Hart defeated Austin in a highly acclaimed submission match with Ken Shamrock as a special referee. During the match, Hart and Austin made a double turn, changing Austin to babyface. Austin portrayed an anti-hero instead of a traditional babyface. Austin's public popularity surged following the Wrestlemania clash, and Austin 3:16 merchandise t-shirts were reported in May 1997 to have become the best-selling WWF t-shirts since Hulkamania. Austin eventually got his revenge on Hart in the main event of In Your House 14: Revenge of the 'Taker, defeating him in a match to determine the next contender to The Undertaker's WWF Championship. Austin won when Hart was disqualified due to assistance from The British Bulldog. At In Your House 15: A Cold Day in Hell, Austin had The Undertaker down with the Stone Cold Stunner but was distracted by Pillman, allowing The Undertaker to recover and perform a Tombstone Piledriver for the victory. Austin won the WWF Tag Team Championship twice: first with Shawn Michaels, who vacated the title due to an injury, and with Dude Love. Austin also feuded with Owen Hart, facing him during a ten-man Tag Team match at In Your House 16: Canadian Stampede. At SummerSlam 1997, Austin defeated Owen for the Intercontinental Championship. During the match, Owen botched a Sit-out Piledriver and dropped Austin on his head, resulting in a legitimate bruised spinal cord and temporary paralysis for Austin. Due to the severity of his neck injury, Austin was forced to relinquish both championships.
restrictions on the amount of exposed steel set by building codes. encasing structural steel in brick masonry or concrete to delay exposure to high temperatures. Historically, these masonry encasement methods use large amounts of heavy materials, thus greatly increasing the load to the steel frame. Newer materials and methods have been developed to resolve this issue. The following lists both older and newer methods of fireproofing steel beams (i-beams):
==== Exercise ==== A proper diet and regular exercise are foundations of diabetic care, with one review indicating that a greater amount of exercise improved outcomes. Regular exercise may improve blood sugar control, decrease body fat content, and decrease blood lipid levels.
Sources: en.wikipedia.org
== Applications of recombinant DNA == Recombinant DNA is widely used in biotechnology, medicine and research. Today, recombinant proteins and other products that result from the use of DNA technology are found in essentially every pharmacy, physician or veterinarian office, medical testing laboratory, and biological research laboratory. In addition, organisms that have been manipulated using recombinant DNA technology, as well as products derived from those organisms, have found their way into many farms, supermarkets, home medicine cabinets, and even pet shops, such as those that sell GloFish and other genetically modified animals. The most common application of recombinant DNA is in basic research, in which the technology is important to most current work in the biological and biomedical sciences. Recombinant DNA is used to identify, map and sequence genes, and to determine their function. rDNA probes are employed in analyzing gene expression within individual cells, and throughout the tissues of whole organisms. Recombinant proteins are widely used as reagents in laboratory experiments and to generate antibody probes for examining protein synthesis within cells and organisms. Many additional practical applications of recombinant DNA are found in industry, food production, human and veterinary medicine, agriculture, and bioengineering. Some specific examples are identified below.
=== Visiting positions === He was a visiting professor of biochemistry at the University of California in 1954, and a guest research worker at the Pasteur Institute, Paris, 1957-1958. Later he had many visiting appointments, both in USA and in other countries, including Paraná (Brazil), Kyoto (Japan), Ferrara (Italy), and Rotterdam (The Netherlands).
=== Mechanism of action === Lidocaine alters signal conduction in neurons by prolonging the inactivation of the fast voltage-gated Na+ channels in the neuronal cell membrane responsible for action potential propagation. With sufficient blockage, the voltage-gated sodium channels will not open and an action potential will not be generated. Careful titration allows for a high degree of selectivity in the blockage of sensory neurons, whereas higher concentrations also affect other types of neurons. The same principle applies to this drug's actions in the heart. Blocking sodium channels in the conduction system, as well as the muscle cells of the heart, raises the depolarization threshold, making the heart less likely to initiate or conduct early action potentials that may cause an arrhythmia.
It would dictate US policy for the next twenty years. May 5–6: Peasants rebelled against the government in Cazin and in Velika Kladuša, Bosnia. The uprising was eventually suppressed by government forces. May 11: Robert Schuman describes his ambition of a united Europe. Known as the Schuman Declaration, it marks the beginning of the creation of the European Community. June 25: North Korea invades South Korea, beginning the Korean War. The United Nations Security Council votes to intervene to defend the South. The Soviet Union cannot veto, as it is boycotting the Security Council over the admission of People's Republic of China. June 28: North Korean forces capture Seoul. June 29: The first bombing attack on North Korea was approved by General Douglas MacArthur July 5: United Nations forces engage North Korean forces for the first time, in Osan. They fail to halt the North Korean advance, and fall southwards, towards what would become the Pusan Perimeter. September 30: United Nations forces land at Inchon. Defeating the North Korean forces, they press inland and re-capture Seoul. October 2: United Nations forces cross the 38th parallel, into North Korea. October 6: Forces from the People's Republic of China enter Tibet, with the goal of annexing the region into China itself. October 11: Stalin agrees to send MiG-15 fighters to provide air cover for Chinese forces moving into North Korea. October 22: Pyongyang, the capital of North Korea, falls to United Nations forces. October 22: China intervenes in Korea with 300,000 soldiers, catching the United Nations by surprise.
Vacuum deaerator Composite plastic moulding processes; Production of most types of electric lamps, vacuum tubes, and CRTs where the device is either left evacuated or re-filled with a specific gas or gas mixture; Semiconductor processing, notably ion implantation, dry etch and PVD, ALD, PECVD and CVD deposition and so on in photolithography; Electron microscopy; Medical processes that require suction; Uranium enrichment; Medical applications such as radiotherapy, radiosurgery and radiopharmacy; Analytical instrumentation to analyse gas, liquid, solid, surface and bio materials; Mass spectrometers to create a high vacuum between the ion source and the detector; Vacuum coating on glass, metal and plastics for decoration, for durability and for energy saving, such as low-emissivity glass, hard coating for engine components (as in Formula One), ophthalmic coating, milking machines and other equipment in dairy sheds; Vacuum impregnation of porous products such as wood or electric motor windings; Air conditioning service (removing all contaminants from the system before charging with refrigerant); Trash compactor; Vacuum engineering; Sewage systems (see EN1091:1997 standards); Freeze drying; and Fusion research. In the field of oil regeneration and re-refining, vacuum pumps create a low vacuum for oil dehydration and a high vacuum for oil purification. A vacuum may be used to power, or provide assistance to mechanical devices. In hybrid and diesel engine motor vehicles, a pump fitted on the engine (usually on the camshaft) is used to produce a vacuum.
Sources: en.wikipedia.org
== Pathophysiology == Acanthosis nigricans results from activation of growth factor receptor pathways, most commonly insulin-mediated stimulation of insulin-like growth factor receptor on keratinocytes and fibroblasts. Hyperinsulinaemia may also displace IGF-1 from its binding proteins, amplifying epidermal proliferation. Contributing mechanisms include:
== Season 2 (2016) == Seven bakers competed in a five-episode baking tournament. In this season they incorporated midround twists (usually an ingredient the contestants had to add to their confection). The winner got $25,000. Judges for this season are Carla Hall, Sandra Lee, and Damiano Carrara.
The chain catshark or chain dogfish (Scyliorhinus retifer) is a small, reticulated catshark that is biofluorescent. The species is common in the Northwest Atlantic, Gulf of Mexico, and Caribbean. It is harmless and rarely encountered by humans. It has very similar reproductive traits to the small-spotted catshark (S. canicula).
==== Bacterial proteasomes ==== Actinobacteria have acquired a proteasome degradation pathway, including its own 20S core particle and a AAA protein motor, MPA (mycobacterial proteasome activator). Unlike the base subcomplex of the 19S, MPA is a homohexameric motor complex, containing the ATPase sites, a tandem (oligosaccharide/oligonucleotide-binding) OB ring, and Coiled coils that extend off N-termini off the OB ring. The C-terminus contains HBXY motifs that contact the 20S core particle in a similar way as with other regulatory particles. Targeting to MPA requires a prokaryotic protein, Prokaryotic ubiquitin-like protein (or Pup) that functions as ubiquitin as a tag that can be attached to a protein substrate, though the structure of Pup is unrelated to that of ubiquitin. Once attached, a puplyated protein can be targeted to MPA through the coiled-coil and can be directed through the AAA motor into the 20S for degradation.
Sources: en.wikipedia.org
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.
No. SR9009 has not been approved as a therapeutic drug in the United States, European Union, or other major markets. Human safety and efficacy data are very limited. Its presence in consumer products does not imply regulatory approval.
The World Anti-Doping Agency lists SR9009 as a prohibited substance because it can alter gene expression and metabolic pathways relevant to performance. The ban applies at all times, not only during competition. Detection relies on laboratory methods such as mass spectrometry.
SR9009 is a synthetic REV-ERB agonist used in laboratory research. It is not an approved drug, and its effects in humans are not well characterized. It is often sold as a research chemical under the name Stenabolic.