circadian clock raises a handful of sensible questions. This page answers them in order, starting with the fundamentals and moving to applications.
This page was last updated on 2025-10-29 and is reviewed periodically as new material appears.
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 a synthetic small molecule studied as an agonist of the nuclear receptors REV-ERBα and REV-ERBβ. These receptors help regulate circadian rhythms and metabolic gene expression. In laboratory experiments, SR9009 binds these receptors and alters transcription of genes involved in lipid handling, glucose metabolism, and mitochondrial function. It is not a naturally occurring compound and has no approved therapeutic use. Research interest stems from its ability to modify energy metabolism in cells and animal models.
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.
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.
| Property | Value | Notes |
|---|---|---|
| Chemical class | Synthetic small-molecule REV-ERB agonist | Not a hormone or natural product |
| Primary targets | REV-ERBα and REV-ERBβ | Nuclear receptors involved in circadian and metabolic regulation |
| Appearance | White to off-white solid | Typical for purified research samples |
| Solubility | Soluble in DMSO and ethanol; low water solubility | Laboratory solubility depends on solvent and purity |
| Common synonyms | SR9009; Stenabolic | Stenabolic is a colloquial name, not a formal chemical name |
SR9009 is frequently discussed alongside other REV-ERB ligands, including synthetic agonists and natural heme-related molecules. Its selectivity for REV-ERB over related nuclear receptors has been measured in binding and reporter assays, though off-target activity at higher concentrations is possible. The compound is prohibited in sport by the World Anti-Doping Agency, and it is not approved for any medical use in major jurisdictions. Products sold online may be labeled as research chemicals, and their identity and purity are not guaranteed by regulatory review.
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.
REV-ERB proteins help regulate daily cycles in gene expression, including genes tied to lipid and glucose metabolism. SR9009 binds these receptors and alters their activity in cell and animal experiments. Consequences observed in rodents include changes in skeletal muscle oxidative capacity, blood lipid levels, and exercise performance. The precise chain from receptor occupancy to whole-body effects is still an active area of study. Human responses cannot be assumed from rodent data.
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.
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.
Mechanistically, SR9009 binds the ligand-binding domain of REV-ERBα/β and enhances recruitment of corepressor complexes. This represses target genes rather than activating them. Because REV-ERB proteins normally compete with ROR proteins at shared response elements, the net effect depends on tissue and timing. Researchers use SR9009 to probe how nuclear receptor signaling links the clock to metabolism, inflammation, and muscle biology. Findings are largely preclinical, and the precise contribution of each receptor subtype remains under study.
SR9009 is frequently discussed in fitness and research-chemical contexts, yet it has no approved medical indication. Regulatory agencies have not authorized it for human use, and it is not a standard prescription drug. Some sports organizations list it as a prohibited substance because of its potential performance-enhancing properties. Published human data are sparse, so claims about its effects in people often rely on animal models or anecdotal reports. Quality and identity of online materials can vary widely.
=== Jerry Conner === Jerry Garcia Conner is played by Cole Roberts and Morgan Roberts. Jerry is the youngest of Roseanne and Dan's children, born in 1995 when the two are in their forties. Jerry's conception presented a struggle for Roseanne and Dan, who previously never experienced fertility issues. He was named after musician Jerry Garcia of the Grateful Dead, who had a fatal heart attack during Roseanne's pregnancy and of whom she and Dan were fans. The decision to add a pregnancy storyline to the series coincided with Roseanne Barr's real-life pregnancy with her son, Buck Thomas. Barr, like her character, struggled with fertility, though Barr ultimately resorted to fertility drugs to conceive while her character became pregnant naturally. Initially, it was planned that the new cast addition would be a daughter, but when Barr gave birth to a boy, she decided the Conners should have a son instead, wanting her on-screen child's sex to match her newborn child's. Once it was decided the baby would be a boy, Barr named the character after Jerry Garcia and intended to have Roseanne give birth at a Grateful Dead concert. However, plans for a concert birth were scrapped when Garcia died unexpectedly. Because he was so young, Jerry did not play a significant role in the series' initial run. Jerry never appeared in Season 10, nor did he appear on The Conners. In a season 10 episode, Roseanne briefly alluded to Jerry being on a fishing boat in Alaska, hence his absence.
=== Hereditary transthyretin-mediated amyloidosis === Inotersen received FDA approval for the treatment of hereditary transthyretin-mediated amyloidosis in October 2018. The application for inotersen was granted orphan drug designation. It was developed by Ionis Pharmaceuticals and licensed to Akcea Therapeutics. Patisiran (sold under Onpattro) was developed by Alnylam Pharmaceuticals, and also approved for use in the US and EU in 2018 with orphan drug designation. Its mechanism-of-action is the active substance of small interfering RNA (siRNA), which allows it to interfere with and block the production of transthyretin. As such, it was the first FDA-approved siRNA therapeutic.
== Plays == Vera; or, The Nihilists (1880/1882) (text) The Duchess of Padua (1883) (text) Lady Windermere's Fan (1892) (text) A Woman of No Importance (1893) (text) An Ideal Husband (1895) (text) The Importance of Being Earnest (1895) (text) Salomé (1896) Translated from French by Lord Alfred Douglas (text) La Sainte Courtisane (Incomplete) (text) A Florentine Tragedy (Incomplete) (text) (Dates are dates of first performance, which approximate better to the probable date of composition than dates of publication.)
With the end of apartheid after the first multi-racial elections and the coming into force of the Interim Constitution of South Africa on 27 April 1994, Bophuthatswana ceased to exist and once again became part of South Africa. The majority of the country became part of the North West province, while the Thaba 'Nchu district became part of the Free State, and the Mathanjana exclave north-east of Pretoria became part of Mpumalanga. The capital, Mmabatho, was merged with Mafikeng and the combined city is now the capital of the North-West province.
Homo sapiens FGFR1 oncogene partner 2 (FGFR1OP2), transcript variant 1, mRNA (NCBI) Homo sapiens FGFR1 oncogene partner 2 isoform 1 (NCBI) FGFR1OP2 human gene location in the UCSC Genome Browser. FGFR1OP2 human gene details in the UCSC Genome Browser.
Sources: en.wikipedia.org
American planners had briefly contemplated an invasion of northern Japan from the Aleutian Islands during the autumn of 1943 but rejected that idea as too risky and impractical. They considered the use of Boeing B-29 Superfortresses, on Amchitka and Shemya bases, but rejected the idea. The U.S. military maintained interest in these plans when they ordered the expansion of bases in the western Aleutians, and major construction began on Shemya. In 1945, plans for a possible invasion of Japan via the northern route were shelved. Between 18 and 31 August 1945 Soviet forces invaded the North and South Kurils. The Soviets expelled the entire Japanese civilian population of roughly 17,000 by 1946. Between 24 August and 4 September 1945 the Eleventh Air Force of the United States Army Air Forces sent two B-24s on reconnaissance missions over the North Kuril Islands with the intention of taking photos of the Soviet occupation in the area. Soviet fighters intercepted and forced them away. In February 1945 the Yalta Agreement promised to the Soviet Union South Sakhalin and the Kuril islands in return for entering the Pacific War against the Japanese during World War II. In August 1945 the Soviet Union mounted an armed invasion of South Sakhalin at the cost of over 5,000 Soviet and Japanese lives.
Lowrie has played Sherlock Holmes in the radio drama series The Further Adventures of Sherlock Holmes on the program Imagination Theatre since 2001. He also voiced Holmes in the program's related radio series The Classic Adventures of Sherlock Holmes. He and Lawrence Albert, who voices Dr. Watson on the program, are the longest-running audio Holmes and Watson team in American radio history. In 2011, he published a science fiction novel titled Dancing with Eternity. An audiobook version narrated by Lowrie and McLain was released in April 2014. In 2021, Lowrie directed a livestreamed version of the play 'night, Mother starring his wife Ellen McLain and Sheila Houlahan on the online platform Twitch with the story adapted by McLain within the context of the COVID-19 pandemic. The filmed online play is performed through an online face-to-face chat with the screen split between McLain's and Houlahan's screens, occasionally interrupted by cuts to pre-filmed footage relevant to the story. Lowrie has also had small roles in several live-action films, most notable of which being the 2025 critically acclaimed period drama Train Dreams as a foreman overlooking the construction of a railroad for the Spokane International Railway (credited as Mr. Sears).
== Career == In 1967, Chrétien opened a laboratory on polypeptide hormones at the Clinical Research Institute of Montreal (CRIM), where he would remain until 1999. He was an Associate Member, Experimental Medicine at McGill University from 1969 to 1999. In 1999 he was scientific director and CEO of the Loeb Health Research Institute at the Ottawa Civic Hospital. Chrétien was a Professor of Medicine in the Faculty of Medicine at the Université de Montréal from 1975 to 1999. He was Chief of Endocrinology at Hôtel-Dieu de Montréal. In 1998, he was appointed a Professor, Department of Medicine, Faculty of Medicine, University of Ottawa. In 2006, he was appointed Senior Scientist of Hormone, Growth and Development at the Ottawa Health Research Institute. He created Quebec’s first protein chemistry laboratory at IRCM in 1967 and continued to lead influential research programs for decades.
=== Remembrance === The Greater Poland uprising was not remembered as well as the January Uprising or the Warsaw Uprising in Polish history and popular culture, despite it being the only one of the three uprisings cited that succeeded. This was due to three factors, the first due to it being an uprising that did not apply to Polish tradition. There were no major icons of the uprising, no heroes, no real martyrs. The uprising could not be passed down by generations as a heroic fight to the death, since it was just a military operation that pushed the Germans out of a section of the Prussian Partition. Secondly, the fighters of the uprising were not engaged for the whole uprising and many of them did not find themselves part of any actual fighting group. Many part of the original uprisings simply took up arms, liberated their towns and by sundown they had eaten dinner and went back to civilian life. Thirdly, there were very few casualties. On 23 December 2021, Polish President Andrzej Duda declared 27 December as a National Holiday, commemorating this uprising.
== Treatment == No specific cure has been discovered for homocystinuria; however, many people are treated using high doses of vitamin B6 (also known as pyridoxine). Slightly less than 50% respond to this treatment and need to take supplemental vitamin B6 for the rest of their lives. Those who do not respond usually respond to supplementation with folic acid and trimethylglycine (betaine). Typically this is mediated by cystathionine beta-synthase activity, i.e. those who have adequate CBS activity typically respond to B6 . Occasionally adding cysteineto the diet can be helpful, as glutathione is synthesized from cysteine (so adding cysteine can be important to reduce oxidative stress). Riboflavin, a cofactor for the MTHFR enzyme pathway and multiple glutathione-related pathways, may also be used. Betaine (N,N,N-trimethylglycine) is used to reduce concentrations of homocysteine by promoting the conversion of homocysteine back to methionine, i.e., increasing flux through the re-methylation pathway independent of folate derivatives (which is mainly active in the liver and in the kidneys). The re-formed methionine is then gradually removed by incorporation into body protein. The methionine that is not converted into protein is converted to S-adenosyl-methionine which goes on to form homocysteine again. Betaine is, therefore, only effective if the quantity of methionine to be removed is small. Hence treatment includes both betaine and a diet low in methionine.
Sources: en.wikipedia.org
Some proteins never fold in cells at all except with the assistance of chaperones which either isolate individual proteins so that their folding is not interrupted by interactions with other proteins or help to unfold misfolded proteins, allowing them to refold into the correct native structure. This function is crucial to prevent the risk of precipitation into insoluble amorphous aggregates. The external factors involved in protein denaturation or disruption of the native state include temperature, external fields (electric, magnetic), molecular crowding, and even the limitation of space (i.e. confinement), which can have a big influence on the folding of proteins. High concentrations of solutes, extremes of pH, mechanical forces, and the presence of chemical denaturants can contribute to protein denaturation, as well. These individual factors are categorized together as stresses. Chaperones are shown to exist in increasing concentrations during times of cellular stress and help the proper folding of emerging proteins as well as denatured or misfolded ones. Under some conditions proteins will not fold into their biochemically functional forms. Temperatures above or below the range that cells tend to live in will cause thermally unstable proteins to unfold or denature (this is why boiling makes an egg white turn opaque).
=== Drug interactions === Using 2 drugs at the same time can sometimes affect each other's fraction unbound. For example, assume that Drug A and Drug B are both protein-bound drugs. If Drug A is given, it will bind to the plasma proteins in the blood. If Drug B is also given, it can displace Drug A from the protein, thereby increasing Drug A's fraction unbound. This may increase the effects of Drug A, since only the unbound fraction may exhibit activity.
These are only two examples in a burgeoning field of fluorescent microcopy and a more complete review of biosensors utilizing GFP and other fluorescent proteins can be found here For example, GFP had been widely used in labelling the spermatozoa of various organisms for identification purposes as in Drosophila melanogaster, where expression of GFP can be used as a marker for a particular characteristic. GFP can also be expressed in different structures enabling morphological distinction. In such cases, the gene for the production of GFP is incorporated into the genome of the organism in the region of the DNA that codes for the target proteins and that is controlled by the same regulatory sequence; that is, the gene's regulatory sequence now controls the production of GFP, in addition to the tagged protein(s). In cells where the gene is expressed, and the tagged proteins are produced, GFP is produced at the same time. Thus, only those cells in which the tagged gene is expressed, or the target proteins are produced, will fluoresce when observed under fluorescence microscopy. Analysis of such time lapse movies has redefined the understanding of many biological processes including protein folding, protein transport, and RNA dynamics, which in the past had been studied using fixed (i.e., dead) material. Obtained data are also used to calibrate mathematical models of intracellular systems and to estimate rates of gene expression. Similarly, GFP can be used as an indicator of protein expression in heterologous systems.
NPR also noted that polls underestimated Trump's level of support in battleground states and across the nation. The New York Times asserted that "[Trump] made one essential bet: that his grievances would become the grievances of the MAGA movement, and then the G.O.P., and then more than half the country. It paid off." The Times added that Trump's several setbacks actually benefited his public image and approval, as "his mug shot became a best-selling shirt. His criminal conviction inspired $100 million in donations in one day. The images of him bleeding after a failed assassination attempt became the symbol of what supporters saw as a campaign of destiny." NBC noted a Democratic strategist's contention that male voters' belief that they were "being left behind, that society doesn't have a place for them" was a major factor in men's support for Trump. The network contended that Trump's approval ratings among non-college-educated and middle-income voters, especially among Latinos and young men, showed that he had made strides in his promise to assemble a multiracial, working-class coalition. Trump increased his support from Hispanics from 2020 to 2024, especially near the Mexican–American border and in areas impacted by recent immigration. Several observers pointed to shifting habits in how Americans consume media and a growing lack of trust in mainstream news outlets. Trump embraced alternative media through podcasts and online streamers such as Joe Rogan, Adin Ross, Theo Von, Sneako and the Nelk Boys. The New York Times reported that such avenues "presented a way for Mr.
Sources: en.wikipedia.org
It is a synthetic research compound that activates REV-ERB nuclear receptors. It is not an approved drug or dietary supplement. Most information comes from cell and animal studies.
It binds REV-ERBα and REV-ERBβ and changes transcription of metabolic genes. This can affect circadian rhythm, lipid use, and mitochondrial function. The full downstream effects are still under study.
No. Some rodent studies show increased endurance, but controlled human trials are lacking. Claims about human performance are not established by published evidence.
No. It is an investigational compound without approved therapeutic indications. It is sold for research purposes only in many jurisdictions.