REV-ERB comes up often in conversation and rarely with the context attached. Here we lay out the basics in order, then work through the practical considerations.
Updated 2025-09-26. Numbers and descriptions here follow the published literature rather than marketing material.
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.
Handling recommendations for SR9009 in a laboratory setting include storing the solid at low temperature, protected from light and moisture. The compound is often dissolved in dimethyl sulfoxide or ethanol for experiments. Solutions should be prepared with appropriate personal protective equipment and disposed of according to local rules. Stability data for long-term storage are limited, so stock solutions are typically kept cold and used within defined periods. Records of preparation date and concentration support reproducibility.
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.
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.
| 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 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.
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.
Laboratory samples of SR9009 are typically handled as research chemicals rather than pharmaceuticals. Suppliers usually state that the material is for research use only and not for human or veterinary administration. Storage recommendations generally call for a freezer at approximately −20 °C, protection from light, and a desiccated environment. The solid is often described as a white to off-white powder. Solubility is commonly reported in organic solvents such as dimethyl sulfoxide and ethanol, with low solubility in water.
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.
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.
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.
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.
Scientific discussion of SR9009 often separates animal evidence from human anecdote. Rodent studies provide controlled data on endurance, metabolism, and gene expression, but they use specific strains, doses, and treatment durations. Human reports are mostly uncontrolled and cannot establish cause and effect. Open questions include oral bioavailability, tissue distribution, metabolic stability, and long-term effects. Review articles generally call for more rigorous pharmacokinetic and safety research before any clinical use could be considered.
==== MeSH E05.820.800 – reproductive techniques, assisted ==== MeSH E05.820.800.500 – embryo transfer MeSH E05.820.800.750 – fertilization in vitro MeSH E05.820.800.750.700 – sperm injections, intracytoplasmic MeSH E05.820.800.800 – posthumous conception MeSH E05.820.800.875 – gamete intrafallopian transfer MeSH E05.820.800.937 – insemination, artificial MeSH E05.820.800.937.515 – insemination, artificial, heterologous MeSH E05.820.800.937.525 – insemination, artificial, homologous MeSH E05.820.800.968 – oocyte donation MeSH E05.820.800.984 – ovulation induction MeSH E05.820.800.984.500 – superovulation MeSH E05.820.800.992 – zygote intrafallopian transfer
Vancomycin is recommended to be administered in a dilute solution slowly, over at least 60 min (maximum rate of 10 mg/min for doses >500 mg) due to the high incidence of pain and thrombophlebitis and to avoid an infusion reaction known as vancomycin flushing reaction. This phenomenon has been often clinically referred to as "red man syndrome". The reaction usually appears within 4 to 10 min after the commencement or soon after the completion of an infusion and is characterized by flushing and/or an erythematous rash that affects the face, neck, and upper torso, attributed to the release of histamine from mast cells. This reaction is caused by the interaction of vancomycin with MRGPRX2, a GPCR-mediating IgE-independent mast cell degranulation. Less frequently, hypotension and angioedema occur. Symptoms may be treated or prevented with antihistamines, including diphenhydramine, and are less likely to occur with slow infusion.
ASM Mammal Diversity Database; Archived December 25, 2022, at the Wayback Machine Biodiversitymapping.org – All mammal orders in the world with distribution maps; Archived September 26, 2016, at the Wayback Machine Paleocene Mammals; Archived February 3, 2024, at the Wayback Machine, a site covering the rise of the mammals, paleocene-mammals.de Evolution of Mammals; Archived January 25, 2024, at the Wayback Machine, a brief introduction to early mammals, enchantedlearning.com European Mammal Atlas EMMA; Archived January 25, 2024, at the Wayback Machine from Societas Europaea Mammalogica, European-mammals.org Marine Mammals of the World; Archived June 8, 2019, at the Wayback Machine – An overview of all marine mammals, including descriptions, both fully aquatic and semi-aquatic, noaa.gov Mammalogy.org; Archived March 1, 2020, at the Wayback Machine. The American Society of Mammalogists was established in 1919 for the purpose of promoting the study of mammals, and this website includes a mammal image library
Sources: en.wikipedia.org
The wound is initially cleaned, debrided and observed, typically 4 or 5 days before closure. The wound is purposely left open. Examples: healing of wounds by use of tissue grafts. If the wound edges are not reapproximated immediately, delayed primary wound healing transpires. This type of healing may be desired in the case of contaminated wounds. By the fourth day, phagocytosis of contaminated tissues is well underway, and the processes of epithelization, collagen deposition, and maturation are occurring. Foreign materials are walled off by macrophages that may metamorphose into epithelioid cells, which are encircled by mononuclear leukocytes, forming granulomas. Usually the wound is closed surgically at this juncture, or the scab is eaten, and if the "cleansing" of the wound is incomplete, chronic inflammation can ensue, resulting in prominent scarring.
=== Cellulose casings === Cellulose, usually from cotton linters or wood pulp, is processed to make viscose, which is then extruded into clear, tough casings for making wieners and franks. They also are shirred for easier use and can be treated with dye to make "red hots". The casing is peeled off after cooking, resulting in "skinless" franks. Cellulosic viscose solutions are combined with wood or for example abacá pulp to make large diameter fibrous casings for bologna, cotto salami, smoked ham and other products sliced for sandwiches. This type is also permeable to smoke and water vapor. They can be flat or shirred, depending on application, and can be pretreated with smoke, caramel color, or other surface treatments.
=== Dental care === ACE-inhibitors like lisinopril are considered to be generally safe for people undergoing routine dental care, though the use of lisinopril prior to dental surgery is more controversial, with some dentists recommending discontinuation the morning of the procedure. People may present to dental care suspicious of an infected tooth, but the swelling around the mouth may be due to lisinopril-induced angioedema, prompting emergency and medical referral.
Peukert saw his work as a "warning against the fallacious notion that the normality of industrial society is harmless" and urged historians to consider the "dark side of modernity", instead of seeing modernity as a benign development that was always for the best. Peukert wrote: "The view that National Socialism was...one of the pathological development forms of modernity does not imply that barbarism is the inevitable logical outcome of modernization. The point, rather, is that we should not analyse away the tensions between progressive and aberrant features by making a glib opposition between modernity and tradition: we should call attention to the rifts and danger-zones which result from the civilizing process itself, so that the opportunities for human emancipation which it simultaneously creates can be more thoroughly charted. The challenges of Nazism shows that the evolution to modernity is not a one-way trip to freedom. The struggle for freedom must always be resumed afresh, both in inquiry and in action". Peukert argued that though völkisch racism was extreme, it was by no means exceptional, and instead reflected the logic promoted by the social sciences throughout the West which had argued that the state can and should foster "normality" while identifying "the non-conformity that is to be segregated and eliminated". Seen in this perspective, for Peukert the genocide against the Jews and Romany were only part of a wider project to eliminate all unhealthy genes from the volksgemeinschaft.
Sources: en.wikipedia.org
=== Protein labeling === Protein labeling use a short tag to minimize disruption of protein folding and function. Transition metals are used to link specific residues in the tags to site-specific targets such as the N-termini, C-termini, or internal sites within the protein. Examples of tags used for protein labeling include biarsenical tags, Histidine tags, and FLAG tags.
During the Allied occupation of Germany after World War II, internal borders were redrawn by the Allied military governments. New states were established in all four zones of occupation: Bremen, Hesse, Württemberg-Baden, and Bavaria in the American zone; Hamburg, Schleswig-Holstein, Lower Saxony, and North Rhine-Westphalia in the British zone; Rhineland-Palatinate, Baden, Württemberg-Hohenzollern and the Saarland – which later received a special status – in the French zone; Mecklenburg(-Vorpommern), Brandenburg, Saxony, Saxony-Anhalt, and Thuringia in the Soviet zone. No single state comprised more than 30% of either population or territory; this was intended to prevent any one state from being as dominant within Germany as Prussia had been in the past. Initially, only seven of the pre-War states remained: Baden (in part), Bavaria (reduced in size), Bremen, Hamburg, Hesse (enlarged), Saxony, and Thuringia. The states with hyphenated names, such as Rhineland-Palatinate, North Rhine-Westphalia, and Saxony-Anhalt, owed their existence to the occupation powers and were created out of mergers of former Prussian provinces and smaller states. Former German territory that lay east of the Oder-Neisse line fell under either Polish or Soviet administration but attempts were made at least symbolically not to abandon sovereignty well into the 1960s.
== Further reading == WHO traditional medicine strategy: 2014-2023. World Health Organization. 2013. hdl:10665/92455. ISBN 978-92-4-150609-0. Retrieved 1 April 2023. Baran GR, Kiana MF, Samuel SP (2014). "Chapter 2: Science, Pseudoscience, and Not Science: How Do They Differ?". Healthcare and Biomedical Technology in the 21st Century. Springer. pp. 19–57. doi:10.1007/978-1-4614-8541-4_2. ISBN 978-1-4614-8540-7. Barnes, Linda L. (2005). Needles, Herbs, Gods, and Ghosts: China, Healing, and the West to 1848. Cambridge, Mass: Harvard University Press. ISBN 0-674-01872-9. Shows early use of Chinese medicine not always perceived as "Chinese." Baum, Emily (2020). "Medicine and Public Health in Twentieth-Century China: Histories of Modernization and Change". History Compass. 18 (7) e12616. doi:10.1111/hic3.12616. S2CID 225622823. Liu, Lihong (2019). Classical Chinese Medicine. Translated by Weiss, Gabriel; Henry Buchtel; Sabine Wilms. Shatin, NT Hong Kong: Chinese University of Hong Kong Press; distributed by Columbia University Press. ISBN 978-988-237-057-9. Lloyd, G. E. R.; Sivin, Nathan (2002). The Way and the Word: Science and Medicine in Early China and Greece. New Haven: Yale University Press. ISBN 0-300-09297-0. Lo, Vivienne; Stanley-Baker, Michael, eds. (2022), Routledge Handbook of Chinese Medicine, New York: Routledge, ISBN 978-0-415-83064-5 The Open Access version of this book, available at Online Open Access Archived 4 March 2024 at the Wayback Machine, has been made available under a Creative Commons Attribution-Non Commercial-No Derivatives 4.0 license.
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 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.