The short version of circadian rhythm fits in a sentence. The long version — which is the one that helps — is below.
Reviewed 2025-08-21. Anything still debated is marked as such rather than presented as settled.
SR9009 is a synthetic small molecule studied as an agonist of the nuclear receptors REV-ERBα and REV-ERBβ, also called NR1D1 and NR1D2. These receptors help regulate circadian rhythms and metabolic gene programs. The compound was developed for laboratory research, not as an approved therapeutic. Its identity is distinct from steroid hormones and selective androgen receptor modulators. Scientific interest centers on how REV-ERB activation changes gene expression in cells and animal models.
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.
Analytical chemists detect SR9009 with liquid chromatography-tandem mass spectrometry, commonly abbreviated LC-MS/MS. Sample preparation may involve protein precipitation, liquid-liquid extraction, or solid-phase extraction before analysis. Laboratories can target the parent compound or its metabolites, depending on the matrix and the purpose of testing. Anti-doping methods require sensitive and specific assays because concentrations in biological samples can be low. Reference standards and validated methods are essential for reliable identification and quantification.
Regulatory agencies have not approved SR9009 for human therapeutic use. It is typically sold as a research chemical with labels stating that it is not for human consumption. The World Anti-Doping Agency prohibits the substance in sport, generally under the category of non-approved substances. Customs and national laws may restrict importation, sale, or possession. Product quality and legal status can vary by country and vendor, and therapeutic claims are not permitted in regulated advertising because the compound lacks approval.
Several misconceptions surround SR9009. It is often described as a SARM, a steroid, or an exercise pill, but its known target is the REV-ERB receptor family. Rodent studies have examined exercise capacity and metabolic markers, yet human outcomes remain unproven. Oral bioavailability appears low in animals, and human pharmacokinetics are not well characterized. Online products may contain impurities or different compounds, so identity and purity testing are important for research use.
| Property | Value | Notes |
|---|---|---|
| Chemical class | Synthetic small molecule | Studied as a REV-ERB agonist |
| Molecular formula | C20H24ClN3O4S | Reported for the neutral compound |
| Appearance | Off-white to pale yellow solid | Typical research-grade material |
| Solubility | Sparingly soluble in water | Soluble in solvents such as DMSO |
| Common synonyms | SR9009; Stenabolic | Stenabolic is an informal alias |
In rodent studies, SR9009 has been reported to increase mitochondrial content in skeletal muscle and improve exercise endurance under some conditions. These findings led to popular descriptions such as an exercise mimetic, although that term oversimplifies the biology. Effects vary by dose, timing, tissue, and model. The compound's influence on circadian pathways means that time of administration can matter in experiments. Whether similar metabolic changes occur in humans remains largely unexplored in controlled published trials.
Pharmacokinetic data for SR9009 are limited in published literature. Some reports indicate low oral bioavailability and rapid clearance in animals, which complicates interpretation of exposure and effect. Researchers often use injected routes in preclinical work to achieve measurable systemic levels. Analytical studies rely on mass spectrometry to detect the parent compound and its metabolites. Questions about tissue distribution, active metabolites, and long-term consequences remain open. Species differences in metabolism can affect observed half-life and target engagement.
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.
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.
Foreign policy was the responsibility of Józef Beck, under whom Polish diplomacy attempted balanced approaches toward Germany and the Soviet Union, without success, on the basis of a flawed understanding of the European geopolitics of his day. Beck had numerous foreign policy schemes and harbored illusions of Poland's status as a great power. He alienated most of Poland's neighbors, but is not blamed by historians for the ultimate failure of relations with Germany. The principal events of his tenure were concentrated in its last two years. In the case of the 1938 Polish ultimatum to Lithuania, the Polish action nearly resulted in a German takeover of southwest Lithuania, the Klaipėda Region (Memel Territory), which had a largely German population. Also in 1938, the Polish government opportunistically undertook a hostile action against the Czechoslovak state as weakened by the Munich Agreement and annexed a small piece of territory on its borders. In this case, Beck's understanding of the consequences of the Polish military move turned out to be completely mistaken, because in the end the German occupation of Czechoslovakia markedly weakened Poland's own position. Furthermore, Beck erroneously believed that Nazi-Soviet ideological contradictions would preclude their cooperation. At home, increasingly alienated and suppressed minorities threatened unrest and violence. Extreme nationalist circles such as the National Radical Camp grew more outspoken.
They also determine when each plant is ready to be harvested, and using a special knife called a coa (with a circular blade on a long pole), carefully cut away the leaves from the piña (the succulent core of the plant), which can average around 70 kg (150 lb) in the valley and 110 kg (240 lb) in the highlands. If harvested too late or too early, the piñas will not have the right amount of carbohydrates for fermentation. After harvesting, the piñas [ˈpiɲas] are transported to ovens where they are slowly baked to break down their complex fructans into simple fructose. Then, the baked piñas are either shredded or mashed under a large stone wheel called a tahona [taˈona]. The pulp fiber, or bagazo [baˈɣaso], left behind is often reused as compost or animal feed, or can be used as fuel or processed into paper. Some producers like to add a small amount of bagazo back into their fermentation tanks for a stronger agave flavor in the final product. The extracted agave juice is then poured into either large wooden or stainless steel vats for several days to ferment, resulting in a wort, or mosto [ˈmosto], with low alcohol content. This wort is then distilled once to produce what is called ordinario [oɾðiˈnaɾjo], and then a second time to produce clear "silver" tequila. A minimum of two distillations is required by law.
==== Home dialysis ==== UK clinical guidelines recommend offering people a choice regarding where they get their dialysis. Research in the UK found that receiving dialysis at home can lead to better quality of life and is less costly than receiving dialysis in hospital. However, many people in the UK prefer to receive dialysis in hospital: In 2022, only 1 in 6 chose receiving it at home. There are various reasons why people do not choose home dialysis. Among these are preferring hospitals as a way of getting regular social contact, being concerned about necessary changes to their homes and their family members becoming carers. Other reasons include a lack of motivation, doubting abilities for self-managed treatment, and not having suitable housing or support at home. Hospital dialysis is also often presented as the norm by healthcare professionals. Encouraging people to have dialysis at home could reduce the impact of dialysis on people's social and professional lives. Some ways to help are offering peer support from other people on home dialysis, better education materials, and professionals being more familiar with home dialysis and its impact. Choosing home dialysis is more likely at kidney centers which have better organisational culture, leadership and attitude.
Sources: en.wikipedia.org
== Medical uses == Icotrokinra is indicated for the treatment of moderate-to-severe plaque psoriasis in people aged twelve years of age and older who weigh at least 40 kilograms (88 lb) who are candidates for systemic therapy or phototherapy.
Rashtriya Parivartan Dal (National Transformation Party) is a political party in India led by D. P. Yadav. RPD have 2 seats in UP State Assembly. Party President is D. P. Yadav, Uttar Pradesh State President is Ram Samujh and State Vice President is Abhinav Shukla. Yadav's son, Vikas Yadav, had contested the 2002 Uttar Pradesh state assembly elections and lost. Vikas Yadav stands accused of murder. Ahead of the 2004 Lok Sabha elections Yadav joined the Bharatiya Janata Party. His stay in the party did however become short, due to the overwhelming criticism inside the BJP for accepting him in spite of his criminal record. After being expelled from the BJP, Yadav reconstituted RPD
According to data from 2024, the 250 seats in the People's Council are distributed as follows: Sunni Muslims (171 seats), reflecting their majority status in Syria's population, Alawites (39 seats), corresponding to their demographic proportion, Christians (23 seats), allocated across various provinces, Druze (9 seats), with a significant number from the Suwayda Governorate, Shia Muslims (5 seats), Ismailis (2 seats) and Murshidites (1 seat). Out of a 210-member People's Assembly formed after the fall of the Ba'athist government in 2024, 140 seats were allocated through a transitional electoral process. Of those elected, six were women and 10 were minority representatives (Kurds, Christians, and two Alawites). The 70 appointed members included 15 women, with officials stating the appointments were intended to address limited representation in the elected portion of the assembly.
== Lithium carbonate equivalent == Lithium carbonate equivalent, abbreviated LCE, is an industry standard for lithium compounds whose lithium content is expressed in weight-equivalent of lithium carbonate. The term is commonly used in the lithium mining industry.
Sources: en.wikipedia.org
Human serum albumin, osmolyte and carrier protein α-fetoprotein, the fetal counterpart of serum albumin Soluble plasma fibronectin, forming a blood clot that stops bleeding C-reactive protein, opsonin on microbes, acute phase protein Various other globulins
== Prognosis == Symptoms usually get worse over the course of two weeks, then stabilize, and finally begin to improve. Motor problems, including chorea, settle within an average of 2–3 months. Recurrence is seen in 16–40% of cases. It is sometimes but not always associated with a rise in ASO titre or other evidence of new streptococcal infection. Recurrence is more likely with poor compliance with penicillin prophylaxis. It is more likely if there is failure to remit within 6 months of onset. Recurrence is associated in women with pregnancy (chorea gravidorum) and with female hormone treatment, although the onset of chorea can be delayed by months or more. Intramuscular penicillin given every 2–3 weeks is superior to a 4 weekly regime for preventing relapse, but a risk assessment may conclude that twice daily oral penicillin is sufficiently effective, less painful for the child, and less demanding on the family. Higher recurrence rates are seen with the longest follow up. Relapse can be seen 10 years or more after the initial episode, so might be underestimated by series with shorter follow up. Recurrence is usually only chorea, even if the original case was associated with rheumatic fever. There are two total reports of heart disease worsening after recurrence of chorea. The Thailand study also had 2 cases where carditis, which had improved after initial diagnosis, came back again. Some suggest that recurrent chorea is a different disease altogether. 10% reported long-term tremor in one study (10 years follow up).
== Structure == The activin and inhibin protein complexes are both dimeric in structure, and, in each complex, the two monomers are linked to one another by a single disulfide bond. In addition, both complexes are derived from the same family of related genes and proteins but differ in their subunit composition. Below is a list of the most common inhibin and activin complexes and their subunit composition:
Sources: en.wikipedia.org
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.
No. SR9009 is frequently mislabeled as a SARM in online discussions, but it does not target androgen receptors. Its known mechanism involves REV-ERB nuclear receptors and circadian-metabolic gene regulation.
Human clinical data are very limited. There is no approved human use, and safety and efficacy in people are not established. Most evidence comes from preclinical models, so effects observed in animals may not apply to humans.
Legality depends on the country and the intended use. In many places it is not approved as a medicine and may be sold only as a research chemical. Importation or possession can be restricted, and sports organizations prohibit it.