Everything below concerns circadian clock. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Last reviewed on 2026-06-06. Where a claim depends on a specific study, the study is described rather than over-claimed.
Most published work on SR9009 consists of preclinical studies. It is widely sold as a research chemical, a category that does not imply safety, efficacy, or pharmaceutical-grade quality. Sports anti-doping organizations have listed SR9009 as a prohibited substance, and its presence in an athlete sample can lead to sanctions. Legal status differs by country; in several jurisdictions it is not approved for human consumption and may be treated as an unapproved new drug.
SR9009 is a synthetic small molecule studied as an agonist of the nuclear receptors REV-ERBα and REV-ERBβ. It is not a steroid, peptide, or natural hormone. In scientific literature, it appears under the code SR9009 and in non-scientific contexts as Stenabolic. The compound was identified through chemical screening efforts aimed at targeting circadian clock components. Its status remains investigational, and no regulatory agency has approved it as a human medicine.
Regulatory and sporting contexts treat SR9009 as a prohibited substance in many elite competitions. Its presence on banned lists reflects concerns about performance enhancement and unknown long-term safety. Analytical chemists have developed methods to detect the parent compound and its metabolites in urine and blood. Literature discussions distinguish between in vitro potency, animal pharmacology, and anecdotal human reports. The latter are difficult to verify because products sold online may lack purity or contain different compounds.
SR9009 is a synthetic small molecule studied as an agonist of the nuclear receptors REV-ERBα and REV-ERBβ. These receptors help regulate circadian rhythms, lipid metabolism, and inflammatory gene expression. In cell and animal experiments, SR9009 alters transcription of clock-controlled genes and metabolic pathways. The compound is not a hormone and does not resemble classical steroid structures. Its activity depends on binding to the ligand-binding domain of REV-ERB, where it can modify corepressor recruitment.
Research interest in SR9009 grew from studies of circadian biology and metabolic disease. Preclinical reports describe effects on exercise capacity, muscle metabolism, and blood lipid levels in rodents, but these findings come from controlled laboratory settings. The compound has low oral bioavailability in animals, which limits systemic exposure after swallowing. Investigators often use injected routes in experiments to achieve measurable plasma concentrations. Human clinical data are sparse, no approved therapeutic product exists, and whether animal effects translate to humans remains an open question.
| Property | Value | Notes |
|---|---|---|
| Common name | SR9009 | Also referred to as Stenabolic in non-scientific contexts. |
| Chemical class | Synthetic small molecule | Not a steroid or peptide hormone. |
| Receptor target | REV-ERBα and REV-ERBβ | Nuclear receptor agonist in preclinical studies. |
| Development status | Investigational | No approved human therapeutic indication. |
| Regulatory attention | Prohibited in sport | Listed by anti-doping authorities. |
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.
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.
Research interest in SR9009 grew from studies showing improved running endurance in mice after short treatment periods. Those experiments linked the compound to increased mitochondrial content and fatty acid oxidation in muscle, but the findings come from animal models and specific dosing schedules. Independent replication has been limited, and the pathways connecting REV-ERB activation to exercise performance are still being mapped. Whether similar responses occur in humans is an open question.
SR9009 is often grouped with compounds studied for circadian and metabolic regulation rather than with classical anabolic steroids. Its interactions with nuclear receptors differ from those of androgen receptor ligands, and its proposed mechanisms involve transcriptional control rather than direct hormone signaling. Some sources classify it as a metabolic modulator because of observed effects on energy utilization. The distinction matters for regulation and for interpreting research results across different compound classes.
SR9009 is a synthetic small molecule developed as a REV-ERB agonist. It binds to REV-ERBα and REV-ERBβ, nuclear receptors that help regulate circadian rhythms and metabolic gene expression. In cell and animal studies, the compound alters lipid and glucose handling and influences skeletal muscle oxidative capacity. Its exact effects in humans remain largely uncharacterized because controlled clinical trials have not been reported. The molecule is frequently described in preclinical literature as a metabolic modulator.
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.
The prefix bi- (for joining of ring systems) is translated as 联 (lián, 'join', 'couple'), as in 联苯 for biphenyl. The stereochemical descriptors cis- and trans- are translated as 顺 (shùn, 'along') and 反 (fǎn, 'against'). The relational prefixes ortho-, meta-, and para- are translated as 邻 (lín, 'neighboring'), 间 (jiàn, 'between'), and 对 (duì, 'opposing'), respectively. The structural modification descriptors cyclo-, nor- and homo- are translated as 环 (huán, 'ring'), 降 (jiàng, 'lowered'), and 高 (gāo, 'high'). For example, norbornene is translated as 降冰片烯, in which the trivial name (冰片) for bornyl [literally, camphor] is used. When substitutive nomenclature is used for naming heterocycles, the suffix 杂 (zá, 'mixed') is used in the same way as '-a' in English (as in aza, thia, oxa, etc.). As an example, DABCO (1,4-diazabicylo[2.2.2]octane) is named 1,4-二氮杂二环［2.2.2］辛烷. The common unsaturated groups allyl and propargyl are translated as 烯丙(基) (xībǐng(jī), 'alkene-prop-(yl)') and 炔丙(基) (qūebǐng(jī), 'alkyne-prop-(yl)'). Thus, using 高 for homo- and 烯丙 for allyl, 3-buten-1-ol is also called 高烯丙醇 (i.e., homoallyl alcohol) in Chinese via semisystematic nomenclature. The Chinese Wikipedia page may be consulted for further details.
=== Tuberculosis === Mycobacterium tuberculosis infection, or tuberculosis, has been shown to result in increased levels of active TGF-β within the lung. Due to the broad range of suppressive effects of TGF-β on immune cells, computer modeling has predicted that TGF-β blockade may improve immune responses and infection outcome. Research in animal models has further shown that TGF-β impairs immune responses and elimination of TGF-β signaling results in an enhanced T cell response and lower bacterial burdens. Thus, therapies which block TGF-β may have the potential to improve therapy for tuberculosis.
== Plot == On the day of her first wedding anniversary, Pallavi travels from San Francisco to Los Angeles to meet her former lover, P. Uma Maheswara Rao, unbeknownst to her husband, Arun. Eighteen months earlier, college-going Pallavi aspires to record a dance performance to show her future family post-marriage. Lacking natural skill, she hires Uma, an orphaned statistics student, to tutor her. Over time, Uma helps Pallavi with her dance, assists her in confronting a bully, and the two fall in love. Pallavi arranges for Uma to stay in her family's penthouse, where he tutors local students to earn money. When her family begins seeking marital alliances, Pallavi proposes eloping. Uma initially agrees, but backs out after witnessing Pallavi's father, Chandramouli, lecture a young boy on the financial and emotional responsibilities of marriage. Realizing he needs stability, Uma leaves for New Delhi to pursue a Ph.D., asking Pallavi to wait. Heartbroken and pressured to marry, Pallavi severs contact and eventually agrees to marry her suitor Arun. A year later, Pallavi learns from Uma's former professor that Uma has fallen into severe depression and alcoholism. Feeling responsible, she travels to Los Angeles to confront him. In Los Angeles, Pallavi insists she is happily married, but Uma refuses to believe her. To prove her happiness, Pallavi invites Uma to stay with her and Arun in San Francisco for 10 days with Arun's consent. Uma accepts on the condition that if he fails to see genuine love between the couple, Pallavi must leave him.
A 2021 World Health Organization (WHO) report on PAHs as ambient air pollutants stated that it was not possible to establish if the current WHO guidelines for BaP provided sufficient protection against diseases other than cancer.
frameshift mutation A type of mutation in a nucleic acid sequence caused by the insertion or deletion of a number of nucleotides that is not divisible by three. Because of the triplet nature by which nucleotides code for amino acids, a mutation of this sort causes a shift in the reading frame of the nucleotide sequence, resulting in the sequence of codons downstream of the mutation site being completely different from the original.
Sources: en.wikipedia.org
==== Effects on the immune system ==== Morphine has long been known to act on receptors expressed in cells of the central nervous system resulting in pain relief and analgesia. In the 1970s and '80s, evidence suggesting that people addicted to opioids show an increased risk of infection (such as increased pneumonia, tuberculosis, and HIV/AIDS) led scientists to believe that morphine may also affect the immune system. This possibility increased interest in the effect of chronic morphine use on the immune system. The first step in determining that morphine may affect the immune system was to establish that the opioid receptors known to be expressed on cells of the central nervous system are also expressed on cells of the immune system. One study successfully showed that dendritic cells, part of the innate immune system, display opioid receptors. Dendritic cells are responsible for producing cytokines, which are the tools for communication in the immune system. This same study showed that dendritic cells chronically treated with morphine during their differentiation produce more interleukin-12 (IL-12), a cytokine responsible for promoting the proliferation, growth, and differentiation of T-cells (another cell of the adaptive immune system) and less interleukin-10 (IL-10), a cytokine responsible for promoting a B-cell immune response (B cells produce antibodies to fight off infection). This regulation of cytokines appears to occur via the p38 MAPKs (mitogen-activated protein kinase)-dependent pathway.
Telenursing is experiencing significant growth globally due to factors such as the need to reduce healthcare costs, an increasing aging and chronically ill population, and expanded healthcare coverage to distant, rural, small, or sparsely populated regions. Telenursing can help address nurse shortages, reduce travel time and distances, and minimize hospital admissions. Telepalliative care is a remote approach to optimising quality of life and relieving suffering for people with serious, complex and often fatal illnesses. The World Health Organization (WHO) recommends integrating palliative care as early as possible for any chronic and fatal illness. Telepalliative care typically utilizes telecommunication technologies like video conferencing, messaging for follow-ups, and digital symptom assessments through questionnaires that generate alerts for healthcare professionals. Telepharmacy involves delivering pharmaceutical care via telecommunications to patients in locations where direct contact with a pharmacist may not be possible or difficult. Telepsychiatry (telemental health) uses telecommunications technology to provide remote psychiatric care for individuals with mental health conditions. Telepsychology is the use of communication technology for the remote administration of psychological tests and psychotherapy. Teleneurotherapy utilizes computers and communications technology to deliver neurotherapy remotely.
α-Methylfentanyl was placed on the U.S. Schedule I list in September 1981, only two years after its appearance on the street, but already other fentanyl analogs were being developed. Following the appearance of α-methylfentanyl on the market, dozens of new fentanyl analogs have been reported, starting with para-fluorofentanyl, followed by α-methylacetylfentanyl, then by the highly potent 3-methylfentanyl, and subsequently by many others such as β-hydroxyfentanyl, ohmefentanyl, β-hydroxythiofentanyl and β-hydroxy-4-methylfentanyl. The development of such a wide structural family of novel narcotic drugs was a major factor responsible for the implementation of the Federal Analog Act which for the first time attempted to control entire families of drugs based on their structural similarity rather than scheduling new drug analogs individually as each appeared.
=== Genetic classifications of cells === Autologous: The donor and the recipient of the cells are the same individual. Cells are harvested, cultured or stored, and then reintroduced to the host. As a result of the host's own cells being reintroduced, an antigenic response is not elicited. The body's immune system recognizes these re-implanted cells as its own, and does not target them for attack. Autologous cell dependence on host cell health and donor site morbidity may be deterrents to their use. Adipose-derived and bone marrow-derived mesenchymal stem cells are commonly autologous in nature, and can be used in a myriad of ways, from helping repair skeletal tissue to replenishing beta cells in diabetic patients. Allogenic: Cells are obtained from the body of a donor of the same species as the recipient. While there are some ethical constraints to the use of human cells for in vitro studies (i.e. human brain tissue chimera development), the employment of dermal fibroblasts from human foreskin demonstrates an immunologically safe and thus a viable choice for allogenic tissue engineering of the skin. Xenogenic: These cells are derived isolated cells from alternate species from the recipient. A notable example of xenogeneic tissue utilization is cardiovascular implant construction via animal cells. Chimeric human-animal farming raises ethical concerns around the potential for improved consciousness from implanting human organs in animals. Syngeneic or isogenic: These cells describe those borne from identical genetic code.
== History == Lactobacillus delbrueckii subsp. bulgaricus was first identified in 1905 by Stamen Grigorov, who named it Bacillus bulgaricus. Ilya Metchnikoff, a professor at the Pasteur Institute in Paris, researched the relationship between the longevity of Bulgarians and their consumption of yogurt. He had the idea that aging is caused by putrefactive activity, or proteolysis, by microbes that produce toxic substances in the intestine. Proteolytic bacteria such as clostridia, which are part of the normal intestinal flora, produce toxic substances including phenols, ammonia and indols by digestion of proteins. These compounds are responsible for what Metchnikoff called intestinal auto-intoxication, which, according to him, was the cause of the physical changes associated with old age. It was already known at that time that fermentation with lactic acid bacteria inhibits the deterioration of milk because of its low pH. Metchnikoff's research also noted that rural populations in Southeastern Europe and the Russian steppes daily consume milk fermented with lactic acid bacteria and live relatively longer than other populations. Based on these data Metchnikoff proposed that consumption of fermented milk seeds the intestine with harmless lactic acid bacteria increasing intestinal acidity and suppressing the growth of proteolytic bacteria. His results were questioned after a 1920 study showed that the bacterium could not survive in the human intestines, but the idea nevertheless started the research into actually useful probiotics.
Sources: en.wikipedia.org
United Nations Security Council Resolution 283 was passed in June 1970 calling for all UN member states to close, or refrain from establishing, diplomatic or consular offices in South West Africa. The resolution also recommended disinvestment, boycotts, and voluntary sanctions of that territory as long as it remained under South African rule. In light of these developments, the Security Council sought the advisory opinion of the ICJ on the "legal consequences for states of the continued presence of South Africa in Namibia". There was initial opposition to this course of action from SWAPO and the OAU, because their delegates feared another inconclusive ruling like the one in 1966 would strengthen South Africa's case for annexation. Nevertheless, the prevailing opinion at the Security Council was that since the composition of judges had been changed since 1966, a ruling in favour of the nationalist movement was more likely. At the UN's request, SWAPO was permitted to lobby informally at the court and was even offered an observer presence in the courtroom itself. On 21 June 1971, the ICJ reversed its earlier decision not to rule on the legality of South Africa's mandate, and expressed the opinion that any continued perpetuation of said mandate was illegal. Furthermore, the court found that Pretoria was under obligation to withdraw its administration immediately and that if it failed to do so, UN member states would be compelled to refrain from any political or business dealings which might imply recognition of the South African government's presence there.
negative control Also negative regulation. The inhibition or deactivation of some biological process caused by the presence of a specific molecular entity (e.g. a repressor), in the absence of which the process is not inhibited and thus can proceed normally. In gene regulation, for example, a repressor may bind to an operator upstream from a coding sequence and prevent access by transcription factors and/or RNA polymerase, thereby blocking the gene's transcription. This is contrasted with positive control, in which the presence of an inducer is necessary to switch on transcription.
Romania is a unitary semi-presidential representative democratic republic with a structured system of governance and an active civil society. The President, elected by popular vote, serves as the head of state, representing the country in international affairs, safeguarding constitutional order, and acting as supreme commander of the Romanian Armed Forces. The Prime Minister, appointed by the President and confirmed by the Parliament, acts as the head of government, responsible for overseeing the executive branch, implementing domestic and foreign policies, and managing public administration. Legislative authority is vested in a bicameral Parliament, consisting of the Chamber of Deputies and the Senate, whose members are elected through a proportional representation system. The judiciary operates independently, with the High Court of Cassation and Justice as the highest court of appeal. According to International IDEA's Global State of Democracy (GSoD) Indices and Democracy Tracker, Romania performs in the mid- range on overall democratic measures, with particular strengths in inclusive suffrage and elected government.
Late 14th – early 15th century: Sparse references to individual Cossacks. Late 15th – early 16th century: Cossacks specialising in military professions, mostly serving as mercenary border guards of the Commonwealth, Muscovy, Crimea or the Ottoman Empire, and living in settlements known as a sich. Last quarter of the 16th century – first half of the 17th century: Formation of the Cossacks as a separate social status with the establishment of the Cossack Registry and the recognition of the Zaporozhian Host. In English, Cossack is first attested in 1590.
Sources: en.wikipedia.org
It is a synthetic compound studied as an agonist of REV-ERB nuclear receptors. It is not an approved medicine and has mainly been examined in laboratory and animal research.
No. It is a small molecule that binds nuclear receptors involved in circadian regulation. Its classification differs from anabolic steroids or peptide hormones.
Published human clinical trial data are lacking. Most safety and activity information comes from preclinical models, so effects in people remain uncertain.
SR9009 is a synthetic small molecule studied as an agonist of the REV-ERB nuclear receptors. It is not an approved medicine, and its effects in humans are not well characterized.