If you have been reading about NR1D1 and want a single page that covers the useful parts, this is it: definitions, context, how it is studied, and the questions that come up repeatedly.
Last reviewed on 2025-12-05. Where a claim depends on a specific study, the study is described rather than over-claimed.
Analytical methods for SR9009 typically rely on liquid chromatography coupled with tandem mass spectrometry. The technique can separate the parent compound from related substances and detect low concentrations in biological matrices. Urine and blood are common samples in anti-doping testing, while in vitro studies may use cell culture media. Rapid metabolism and low expected concentrations make method validation important for reliable identification. Exact metabolite patterns can vary by species and are not fully mapped.
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.
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.
| Property | Value | Notes |
|---|---|---|
| Regulatory status | Not approved for human use | Investigational status in most countries |
| Sports status | Prohibited by WADA | Classified as non-approved or metabolic modulator |
| Common analytical method | LC-MS/MS | Used for trace detection in biological samples |
| Typical test matrices | Urine and blood | Sample choice depends on testing program |
| Human trial data | None published | Effects and safety are not established |
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.
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.
Before the introduction of coffee shops, people in high positions often held meetings at kisaeng houses while commoners hung out at jumak to talk about their lives and politics. Since dabangs were the center of debates about politics, economy, culture, education, art, and religion by people of different professions, the Korean government strictly restricted individuals' visit to dabangs. In that sense, Korean cafés in 1950s were very similar to Parisian cafés in the late seventeenth century when the "police [had] closely watched cafés" due to the cafés' function as social institutions (Haine 1992, 608). Coffee would remain a good consumed by the upper classes until the introduction of instant coffee in Korea during the Korean War (1950 – 1953) by the U.S. military. Instant coffee became widely available before and after the Korean War and many Koreans began to enjoy coffee and later became regular drinkers. In the 1960s, the value of coffee skyrocketed because coffee was prohibited from dabangs due to the movement of using domestic products after dictator Park Chung Hee's 5.16 military coup d'état in 1961. However, dabangs in general became more open to middle class citizens in 1960s. Although dabangs were still for adults only, it became a popular dating place for young men and women. The first Korean theme café was probably a music dabang in the 1970s. This type of dabang had disk jockeys who received song requests from customers and played record music for them.
== Function == This gene is a member of the NAD(P)H dehydrogenase (quinone) family and encodes a cytoplasmic 2-electron reductase. This FAD-binding protein forms homodimers and reduces quinones to hydroquinones. This enzyme facilitates the two electron reduction of quinone to hydroquinone. NQO1-mediated two electron reduction of quinone to hydroquinone thereby indirectly prevents the one electron reduction of quinone to the semiquinone free radical. The ubiquitin-independent p53 degradation pathway is regulated by NQO1. NQO1 stabilizes p53, protecting it from degradation. Individuals with decreased NQO1 expression/activity have reduced p53 stability, which may lead to resistance to drugs such as chemotherapeutics.
In structural biology, a protein subunit is a polypeptide chain or single protein molecule that assembles (or "coassembles") with others to form a protein complex. Large assemblies of proteins such as viruses often use a small number of types of protein subunits as building blocks. A subunit is often named with a Greek or Roman letter, and the numbers of this type of subunit in a protein is indicated by a subscript. For example, ATP synthase has a type of subunit called α. Three of these are present in the ATP synthase molecule, leading to the designation α3. Larger groups of subunits can also be specified, like α3β3-hexamer and c-ring. Naturally occurring proteins that have a relatively small number of subunits are referred to as oligomeric. For example, hemoglobin is a symmetrical arrangement of two identical α-globin subunits and two identical β-globin subunits. Longer multimeric proteins such as microtubules and other cytoskeleton proteins may consist of very large numbers of subunits. For example, dynein is a multimeric protein complex involving two heavy chains (DHCs), two intermediate chains (ICs), two light-intermediate chains (LICs) and several light chains (LCs). The subunits of a protein complex may be identical, homologous or totally dissimilar and dedicated to disparate tasks. In some protein assemblies, one subunit may be a "catalytic subunit" that enzymatically catalyzes a reaction, whereas a "regulatory subunit" will facilitate or inhibit the activity.
Sources: en.wikipedia.org
=== United Kingdom === In the United Kingdom (UK) there are two varieties of registered healthcare scientist in hospitals - Clinical Scientists and Biomedical Scientists (BMS). There is a strict and formal post graduate training programme for both careers followed by statutory registration for each with the Health & Care Professions Council UK (HCPC), for the safety and assurance of the customers - the patients. They are two similar but distinct careers with parallel but different training paths and different entry requirements. The role of Clinical Scientists is to improve the health and well-being of patients and the public by practising alongside doctors, nurses, and other health and social care professionals in the delivery of healthcare. Their aim is to provide expert scientific and clinical advice to clinician colleagues, to aid in the diagnosis, treatment and management of patient care. Examples of the type of work they undertake include:
=== Amino acid coupling reagents === An important feature that has enabled the broad application of SPPS is the generation of extremely high yields in the coupling step. In stepwise peptide synthesis by SPPS, highly efficient amide bond-formation conditions are required because all resin-bound peptide products are carried over into the final crude product released from the resin. To illustrate the impact of sub-optimal coupling yields for peptide synthesis, consider the case where each coupling step were to have at least 99% yield: this would result in a 77% overall crude yield for a 26-amino acid peptide (assuming 100% yield in each deprotection); if each coupling were 95% efficient, the overall yield would be 25%. In attempts to maximize coupling yields, often a large excess of each amino acid (between 2- and 10-fold) is used in each SPPS coupling reaction. The minimization of amino acid racemization during coupling is also of vital importance to avoid epimerization in the final peptide product. Amide bond formation between an amine and carboxylic acid requires 'coupling reagents' to activate the carboxyl group of the N-alpha protected amino acid reactant. A wide range of coupling reagents exist, due in part to their varying effectiveness for particular couplings, many of these reagents are commercially available.
=== Emotional blunting === Certain antidepressants may cause emotional blunting, characterized by reduced intensity of both positive and negative emotions as well as symptoms of apathy, indifference, and amotivation. It may be experienced as either beneficial or detrimental depending on the situation. Higher doses of antidepressants seem to be more likely to produce emotional blunting than lower doses. It can be decreased by reducing dosage, discontinuing the medication, or switching to a different antidepressant that may have less propensity for causing this side effect. Specifically, this side effect has been particularly associated with serotonergic antidepressants like SSRIs and SNRIs and may be less with atypical antidepressants like bupropion, agomelatine, and vortioxetine. In addition, whereas the SSRI escitalopram was associated with emotional blunting, the serotonergic psychedelic psilocybin did not cause such side effects and instead was associated with emotional reactivation. Such psychedelic therapies may have future potential for addressing emotional blunting in those with depression. Confounding the understanding of emotional blunting is the fact that the same symptom can be caused by depression itself, and may instead be a sign of incomplete resolution of depression. However, there is a large amount of subjective evidence showing that it is increasingly reported after starting the use of antidepressants, suggesting that antidepressants do induce emotional blunting.
Sources: en.wikipedia.org
== Efficacy and side effects == Cholinergic nerves play an important role in the normal function of the central nervous, endocrine, neuromuscular, immunological, and respiratory system. As all cholinergic fibers contain high concentrations of ACh and AChE at their terminals, inhibition of AChE can impair their function. So exposure to azinphosmethyl, whereas it inhibits AChEs, may disturb a lot of important systems and may have various effects. In the autonomic nervous system, accumulation of acetylcholine leads to the overstimulation of muscarinic receptors of the parasympathetic nervous system. This can affect exocrine glands (increased salivation, perspiration, lacrimation), the respiratory system (excessive bronchial secretions, tightness of the chest, and wheezing), the gastrointestinal tract (nausea, vomiting, diarrhea), the eyes (miosis, blurred vision) and the cardiovascular system (decrease in blood pressure, and bradycardia). Overstimulation of the nicotinic receptors in the para- or sympathetic nervous system may also cause adverse effects on the cardiovascular system, such as pallor, tachycardia and increased blood pressure. In the somatic nervous system, accumulation of acetylcholine may cause muscle fasciculation, paralysis, cramps, and flaccid or rigid tone. Overstimulation of the nerves in the central nervous system, specifically in the brain, may result in drowsiness, mental confusion and lethargy. More severe effects on the central nervous system include a state of coma without reflexes, cyanosis and depression of the respiratory centers.
In July 2024, Lyme Disease Vaccine Reached Completion of the Primary Series In July 2024, Pfizer and Flagship Pioneering announced an "Innovation Supply Chain" partnership to co-develop 10 drug candidates. Each party committed $50 million upfront, leveraging Flagship's ecosystem of over 40 startups to align with Pfizer's priorities. Pfizer will fund the selected programs and has the option to license or acquire assets, with potential success milestones and royalties reaching up to $700 million per commercialized drug. Two programs, focused on obesity and cardiovascular diseases, have already been initiated. In July 2024, Pfizer advanced its obesity treatment research through the development of danuglipron, an oral glucagon-like peptide-1 (GLP-1) receptor agonist: In August 2024, Pfizer introduced PfizerForAll, a digital platform designed to streamline access to healthcare and wellness resources in the United States. In October 2024, Pfizer announced positive results from phase 3 TALAPRO-2 trial of Talzenna in combination with Xtandi in patients with mCRPC. In October 2024, Pfizer announced a partnership with the Ignition AI Accelerator, a collaborative initiative by Nvidia, Tribe, and Digital Industry Singapore (DISG). The collaboration aims using artificial intelligence to expedite drug discovery and development processes, improve operational efficiency, and streamline stakeholder engagement. The initiative also focuses on optimizing manufacturing processes, including improving yields and reducing cycle times.
The county is named after the ancient Welsh Kingdom of Powys, which in the sixth century AD included the northern two-thirds of the area as well as most of Shropshire, Herefordshire and adjacent areas now in England, and came to an end when it was occupied by Llywelyn ap Gruffudd of Gwynedd during the 1260s. The uplands retain evidence of occupation from long before the Kingdom of Powys, and before the Romans, who built roads and forts across the area. There are 1130 identified burial mounds within the county, of varying styles and ages, dating from 4000 BC to 1000 BC, most of them belonging to the Bronze Age. Of these, 339 are scheduled monuments. Standing stones, most again dating to the Bronze Age, also occur in large numbers, 276 being found across the county, of which 92 are scheduled. From the Iron Age, the county has 90 scheduled hillforts and a further 54 enclosures and settlement sites. Powys is served by the Cambrian Line and Heart of Wales line which offer connections to major towns and cities such as Swansea, Wrexham, Shrewsbury, Birmingham, Wolverhampton, Manchester, Cardiff, Aberystwyth, London and Telford. The county used to be served by key railways such as the Mid-Wales Railway, Oswestry and Newtown Railway, Tanat Valley Light Railway, Llanfyllin Branch, Leominster and Kington Railway, Swansea Vale Railway and the Hereford, Hay and Brecon Railway, all of which offered connections to South Wales, Hereford, Oswestry, North Wales and West Wales but have all since closed.
I am ready to meet all our politicians; we have to work together for the common good of Serbia, and to be friends in the name of the future of our country. I appeal for the end of the continuous political wrangling, division and arguments. I appeal for mature democratic debate in the interest of Serbia. Serbia must have clear and realistic objectives. In 2011, an online open access poll by Serbian middle-market tabloid newspaper Blic showed that 64% of Serbians support restoring the monarchy. Another poll in May 2013 had 39% of Serbians supporting the monarchy, with 32% against it. The public also had reservations with Alexander's apparent lack of knowledge of the Serbian language. On 27 July 2015, newspaper Blic published a poll "Da li Srbija treba da bude monarhija?" ("Should Serbia be a monarchy?"); 49.8% respondents expressed support in a reconstitution of monarchy, 44.6% were opposed and 5.5% were indifferent. In 2017, an NGO, the Kingdom of Serbia Association, announced that in 2016, they had collected over 123,000 signatures of support for a referendum on Alexander being named king, short of the 150,000 needed to force a constitutional amendment.
Sources: en.wikipedia.org
No. It is an investigational compound without approved therapeutic indications. It is sold for research purposes only in many jurisdictions.
Sports authorities prohibit it because it is not approved for human use and has potential performance-enhancing effects. It appears on anti-doping lists under non-approved or metabolic modulator categories.
Detection usually uses liquid chromatography-tandem mass spectrometry. The method targets the parent compound or its metabolites in urine or blood.
Legality depends on the country and the intended use. In many places it is sold as a research chemical, but sports and medicine regulations restrict it.