The short version of NR1D2 fits in a sentence. The long version — which is the one that helps — is below.
Reviewed 2025-08-29. Anything still debated is marked as such rather than presented as settled.
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.
SR9009 is generally described as poorly soluble in water and more soluble in organic solvents such as dimethyl sulfoxide and ethanol. Stock solutions are commonly prepared in an organic solvent before dilution into an aqueous buffer or vehicle. Precipitation can occur if the organic fraction is reduced too quickly or if the final concentration exceeds the compound's solubility limit. Sonication or gentle warming may aid dissolution in some protocols, but excessive heat can promote degradation. Container material and pH can also influence observed solubility.
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.
| Property | Value | Notes |
|---|---|---|
| Appearance | White to off-white powder | Visual inspection is not sufficient for identity. |
| Solubility | Soluble in DMSO and ethanol | Low solubility in water; stock solutions use organic solvent. |
| Storage | -20°C, desiccated, protected from light | Limits hydrolysis and photodegradation. |
| Analytical method | HPLC-UV/MS | Used for identity and purity assessment. |
| Synonyms | SR9009, Stenabolic | Naming varies by supplier. |
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.
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.
SR9009 is a synthetic small molecule studied as an agonist of the nuclear receptors REV-ERBα and REV-ERBβ. It is not an approved medicine and has no established human therapeutic use. The compound appears in scientific literature as a tool for probing circadian and metabolic regulation. Online sellers often label it as a research chemical, sometimes using the nickname Stenabolic. Its chemical identity is distinct from selective androgen receptor modulators, stimulants, and peroxisome proliferator-activated receptor delta agonists. Researchers use it mainly in cell and animal experiments.
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.
Aminoglycosides that are derived from bacteria of the Streptomyces genus are named with the suffix -mycin, whereas those that are derived from Micromonospora are named with the suffix -micin. However, this nomenclature system is not specific for aminoglycosides, and so appearance of this set of suffixes does not imply common mechanism of action. (For instance, vancomycin, a glycopeptide antibiotic, and erythromycin, a macrolide antibiotic produced by Saccharopolyspora erythraea, along with its synthetic derivatives clarithromycin and azithromycin, all share the suffixes but have notably different mechanisms of action.) In the following gallery, kanamycin A to netilmicin are examples of the 4,6-disubstituted deoxystreptamine sub-class of aminoglycosides, the neomycins are examples of the 4,5-disubstituted sub-class, and streptomycin is an example of a non-deoxystreptamine aminoglycoside.
When the baby suckles, muscles in the breast squeeze milk towards the nipples. This is called the let-down reflex. Some women report they do not experience anything, while others report a tingling sensation, which is sometimes described as quite strong. The baby may be seen to respond to the start of milk flow by changing from quick sucks to deep rhythmic swallows. Sometimes the let-down is so strong that the baby splutters and coughs, and the mother may need to remove the baby from her breast for a short time until the flow becomes less forceful. Milk may also let down unexpectedly when a mother hears her baby cry or even only thinks about the baby. Nursing pads may be made or purchased to absorb unexpected milk flows.
== Clinical significance == There are at least 25 enzymes and specific transport proteins in the β-oxidation pathway. Of these, 18 have been associated with human disease as inborn errors of metabolism. In addition to genetic fatty-acid metabolism disorders, studies indicate that lipid disorders are involved in diverse aspects of tumorigenesis, and fatty acid metabolism makes malignant cells more resistant to a hypoxic environment. Accordingly, cancer cells can display irregular lipid metabolism with regard to both fatty acid synthesis and mitochondrial fatty acid oxidation (FAO) that are involved in diverse aspects of tumorigenesis and cell growth. Several specific β-oxidation disorders have been identified.
Sources: en.wikipedia.org
where the ion AB+ collides with the neutral species M and subsequently breaks apart. The details of this process are described by collision theory. Due to different instrumental configuration, two main different types of CID are possible: (i) beam-type (in which precursor ions are fragmented on-the-flight) and (ii) ion trap-type (in which precursor ions are first trapped, and then fragmented). A third and more recent type of CID fragmentation is higher-energy collisional dissociation (HCD). HCD is a CID technique specific to orbitrap mass spectrometers in which fragmentation takes place external to the ion trap, it happens in the HCD cell (in some instruments named "ion routing multipole"). HCD is a trap-type fragmentation that has been shown to have beam-type characteristics. Freely available large scale high resolution tandem mass spectrometry databases exist (e.g. METLIN with 960,000 molecular standards each with experimental CID MS/MS data), and are typically used to facilitate small molecule identification.
Tensions continued in late April 2025 after the spread of an offensive audio recording allegedly containing blasphemous content against the Islamic prophet Muhammad, allegedly attributed to a Druze scholar named Marwan Kiwan, who disavowed it.
During World War I, chemist Henry Drysdale Dakin was consulted and invented Dakin's Solution, a mixture of sodium hypochlorite and boric acid, to wash out the traumatic wounds of British soldiers fighting in France.
== Further reading == Aziz, Nusrate; Asadullah, M Niaz (2017). "Military spending, armed conflict and economic growth in developing countries in the post–Cold War era". Journal of Economic Studies. 44 (1): 47–68. Bartel, Fritz (2022). The Triumph of Broken Promises: The End of the Cold War and the Rise of Neoliberalism. Harvard University Press. ISBN 9780674976788. Henriksen, Thomas H. (2017). Cycles in US Foreign Policy Since the Cold War. Palgrave Macmillan. Jones, Bruce D.; Stedman, Stephen John (2017). "Civil Wars & the Post–Cold War International Order". Dædalus. 146 (4): 33–44. Menon, Rajan; Rumer, Eugene B., eds. (2015). Conflict in Ukraine: The Unwinding of the Post–Cold War Order. MIT Press. Peterson, James W. (2017). Russian-American relations in the post–Cold War world. Oxford UP. Sakwa, Richard (2017). Russia against the Rest: The Post–Cold War Crisis of World Order. Cambridge UP. p. 362. Wood, Luke B. (2017). "The politics of identity and security in post–Cold War Western and Central Europe". European Politics and Society. 18 (4): 552–556.
Sources: en.wikipedia.org
This joint review concluded that median and sensory nerve conduction studies are valid and reproducible in a clinical laboratory setting, and a clinical diagnosis of CTS can be made with a sensitivity greater than 85% and specificity greater than 95%. The AANEM has issued evidence-based practice guidelines for the diagnosis of carpal tunnel syndrome, both by electrodiagnostic studies and by neuromuscular ultrasound.
== Education and early career == Barran went to Godolphin and Latymer School. She moved to the University of Manchester to study chemistry, graduating in 1994. She joined the University of Sussex for her graduate studies, working with Harry Kroto and Tony Stace.
the sensitivity of the product to temperatures (high and low) and to time at temperatures the specific distribution system being used: the expected (and worst case) time and temperatures regulatory requirements the specific combination of packaging components and materials being used In specifying an insulated shipping container, the two primary characteristics of the material are its thermal conductivity or R-value, and its thickness. These two attributes will help determine the resistance to heat transfer from the ambient environment into the payload space. The coolant material load temperature, quantity, latent heat, and sensible heat will help determine the amount of heat the parcel can absorb while maintaining the desired control temperature. Combining the attributes from the insulator and coolant will allow analysis of expected duration of the insulated shipping container system. Testing of multi-component systems is needed.
Rogers (2010) defines five major criteria that explain differences in the acceptance of new technology by consumers: complexity, compatibility, relative advantage, trialability and observability. Acceptance of innovative technologies can be improved by providing non-emotional and concise information about these new technological processes methods. The HighTech project also suggests that written information has a higher impact on consumers than audio-visual information.
== See also == Legal status of ayahuasca by country List of substances used in rituals Andrew Gallimore Changa Dimethyltryptamine/harmine Dimethyltryptamine/β-carbolines German Amazon-Jary-Expedition (1935–1937) Ibogaine Icaro Kambo (drug) Yachay
Sources: en.wikipedia.org
Liquid chromatography with mass spectrometry is a common approach. Ultraviolet detection and nuclear magnetic resonance can support identification when suitable standards are available.
The solid is generally kept cold, dry, and protected from light. Solutions are often frozen in single-use aliquots to reduce repeated freeze-thaw cycles.
It indicates a material sold for laboratory study, not for human use. The label does not guarantee pharmaceutical purity, sterility, or regulatory approval.
It is a synthetic compound that acts as an agonist at REV-ERBα and REV-ERBβ. It is used mainly as a research chemical to study circadian and metabolic pathways. It is not approved for human therapeutic use.