NR1D2 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 2025-12-12. Numbers and descriptions here follow the published literature rather than marketing material.
SR9009 is a synthetic small molecule studied as a REV-ERB agonist. REV-ERBα and REV-ERBβ are nuclear receptors that help regulate circadian rhythms and metabolic gene expression. The compound was identified in academic screening efforts to find synthetic ligands for these receptors. In cell and animal studies, SR9009 alters transcription of genes involved in lipid and glucose metabolism, and it can shift circadian behavior. It is not an approved therapeutic agent.
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.
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.
| Property | Value | Notes |
|---|---|---|
| Chemical class | Synthetic REV-ERB agonist | Small-molecule ligand; not a hormone or peptide |
| Molecular formula | C20H24ClN3O4S | Reported for the free base |
| CAS Registry Number | 1379686-30-2 | Unique chemical identifier |
| Common synonyms | SR9009; stenabolic | Stenabolic is informal and not an official name |
| Reported targets | REV-ERBα and REV-ERBβ | Nuclear receptors linked to circadian and metabolic regulation |
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.
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.
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.
As of the 21st century, the vast majority of the world's militaries issue their own field rations, with different varieties of food based on national and cultural considerations. Many use 20th century-style packaging such as cans, boxes, and vacuum-sealed packaging, though some newer rations use retort pouch-based packaging.
=== Validity === Compared to healthy volunteers, SPINA-GR is significantly reduced in persons with prediabetes and diabetes mellitus, and it correlates with the M value in glucose clamp studies, triceps skinfold, subscapular skinfold and (better than HOMA-IR and QUICKI) with the two-hour value in oral glucose tolerance testing (OGTT), glucose rise in OGTT, waist-to-hip ratio, body fat content (measured via DXA) and the HbA1c fraction.
There are a number of different types of actin with slightly different structures and functions. α-actin is found exclusively in muscle fibres, while β- and γ-actin are found in other cells. As the latter types have a high turnover rate the majority of them are found outside permanent structures. Microfilaments found in cells other than muscle cells are present in three forms:
=== Characterization of engineered proteins === Many applications of protein engineering for drug discovery or biophysics applications involve modification of the protein amino acid sequence through truncation, domain fusions, site-specific modifications or random mutagenesis. Thermofluor provides a high throughput method for the evaluation of the effects of such sequence variations on protein stability as well as means for developing stabilizing conditions if required.
Sources: en.wikipedia.org
=== Synthesis === Tizanidine is a derivative of 2,1,3-benzothiadiazole and its first published synthesis was reported in a patent. The 5-chloro-2,1,3-benzothiadiazol-4-amine intermediate was a known compound, produced in three steps from 4-chlorophenylenediamine as shown. Treatment with two equivalents of thionyl chloride in pyridine formed the heterocycle, which was nitrated with sodium nitrate in sulfuric acid and reduced using iron and acetic acid.
=== seg-seo === seganserin (INN) seglitide (INN) Sehippy seladelpar (INN) selamectin Selarsdi Selax Seldane Selecor Select 1/35 Selectol selegiline (INN) selenomethionine (75 Se) (INN) Selepen selepressin (INN) Selestoject seletracetam (USAN, (INN)) selexipag (INN) selfotel (INN) seliciclib (INN) selodenoson (USAN) Selpak selprazine (INN) Selsun Selsun Blue seltraposin (INN) selumetinib (USAN) selurampanel (INN) selvacovatein (INN) semagacestat (USAN, INN) semaglutide (INN) sematilide (INN) semduramicin (INN) Semicid Semilente semorphone (INN) semotiadil (INN) semparatide (INN) Semprex-D semuloparin (USAN, INN) semustine (INN) Senexon senicapoc (USAN) Sennatural senofilcon A (USAN) Senokot Senolax Sensipar Sensorcaine Senvelgo seocalcitol (INN)
Two-dimensional chromatography is a type of chromatographic technique in which the injected sample is separated by passing through two different separation stages. Two different chromatographic columns are connected in sequence, and the effluent from the first system is transferred onto the second column. Typically the second column has a different separation mechanism, so that bands that are poorly resolved from the first column may be completely separated in the second column. (For instance, a C18 reversed-phase chromatography column may be followed by a phenyl column.) Alternately, the two columns might run at different temperatures. During the second stage of separation the rate at which the separation occurs must be faster than the first stage, since there is still only a single detector. The plane surface is amenable to sequential development in two directions using two different solvents.
Taghi allegedly wanted to kill Nabil B. as a punishment for being involved in killing the wrong person, which eventually led to Nabil B. collaborating with the Dutch authorities instead. As a result of this, Taghi ordered to kill Nabil B.'s innocent brother, who was a non-criminal, respected business owner in Amsterdam-Noord. Also Nabil B.'s lawyer Derk Wiersum was assassinated on the orders of Taghi, which eventually shocked the Netherlands. The Dutch parliament considered this as an attack on the Dutch legal system and the Dutch state, and a manhunt on Taghi by the Dutch authorities was eventually launched. In August 2020, six prominent lawyers in the Netherlands were accused of having delivered information to Ridouan Taghi's organisation in exchange for high sums of money. Their names were also added to the Marengo trials. T. Youssef one of Taghi's lawyers, and also his cousin, had been arrested on 8 October 2021, after being suspected of planning a jailbreak and smuggling messages out of prison to Taghi's organisation. In July 2021, the most prominent Dutch crime journalist Peter R. de Vries was assassinated after he left the studio of RTL Boulevard in Amsterdam, right after he appeared on a popular TV show. This assassination deeply shocked the Netherlands, with many politicians and celebrities sharing their condolences and speaking out on the increase of violence in the Netherlands. According to the Dutch authorities, all tracks lead to the already imprisoned Taghi.
Disease testing: Whether the sex of the fetus is male or female allows the determination of the risk of a particular X-linked recessive genetic disorder in a particular pregnancy, especially where the mother is a genetic carrier of the disorder. Preparation, for any sex-dependent aspects of parenting. Sex selection, which after preimplantation genetic diagnosis may be performed by selecting only embryos of the preferred sex, or, after post-implantation methods by performing sex-selective abortion depending on the test result and personal preference. In comparison to obstetric ultrasonography which is unreliable for sex determination in the first trimester and amniocentesis which carries a small risk of miscarriage, sampling of maternal plasma for analysis of cffDNA is without risk. The main targets in the cffDNA analysis are the gene responsible for the sex-determining region Y protein (SRY) on the Y chromosome and the DYS14 sequence.
Sources: en.wikipedia.org
==== Azerbaijan ==== According to research done by the University of Pennsylvania, there are a total of 12 think tanks in Azerbaijan. The Center for Economic and Social Development, or CESD; in Azeri, Azerbaijan, İqtisadi və Sosial İnkişaf Mərkəzi (İSİM) is an Azeri think tank, non-profit organization, NGO based in Baku, Azerbaijan. The center was established in 2005. CESD focuses on policy advocacy and reform, and is involved with policy research and capacity building. The Economic Research Center (ERC) is a policy-research oriented non-profit think tank established in 1999 with a mission to facilitate sustainable economic development and good governance in the new public management system of Azerbaijan. It seeks to do this by building favorable interactions between the public, private and civil society and working with different networks both in local (EITI NGO Coalition, National Budget Group, Public Coalition Against Poverty, etc.) and international levels (PWYP, IBP, ENTO, ALDA, PASOS, WTO NGO Network etc.). The Center for Strategic Studies under the President of Azerbaijan is a governmental, non-profit think tank founded in 2007. It focuses on domestic and foreign policy.
Many of these nutrients are available in the must and skins of the grapes themselves but sometimes are supplemented by winemakers with additions such as diammonium phosphate (DAP), freeze-dried micro-nutrients (such as Go-Ferm and Ferm-K) and even the remnant of dead or extracted yeast cells such that the fermenting yeast can break down to mine for available nitrogen and nutrients. One historical winemaking tradition that is still practiced in some Italian wine regions is the ripasso method of adding the leftover pomace from the pressing of other wines into a newly fermenting batch of wine as an additional food source for the yeast. Saccharomyces cerevisiae can assimilate nitrogen from both inorganic (ammonia and ammonium) and organic forms (amino acids, particularly arginine). As yeast cells die, enzymes within the cells begin autolyzing by breaking down the cell, including the amino acids. This autolysis of the cell provides an available nitrogen source for the still-fermenting and viable yeast cells. However, this autolysis can also release sulfur-link compounds (such as the breakdown of amino acid cysteine) which can combine with other molecules and react with alcohol to create volatile thiols that can contribute to a "stinky fermentation" or later development into various wine faults.
=== Inscribed squares === An acute triangle has three inscribed squares, each with one side coinciding with part of a side of the triangle and with the square's other two vertices on the remaining two sides of the triangle. (A right triangle has only two distinct inscribed squares.) If one of these squares has side length xa and another has side length xb with xa < xb, then
small nuclear RNA (snRNA) A class of small non-coding RNA molecules, approximately 100–300 nucleotides in length and rich in uridine residues, found in association with specific proteins as part of ribonucleoprotein complexes known as snRNPs within nuclear speckles and Cajal bodies of the eukaryotic nucleus. SnRNPs assemble into larger complexes known as spliceosomes which play important roles in the splicing of pre-mRNA transcripts (hnRNAs) before they are exported to the cytoplasm.
The strength and flexibility of carbon nanotubes makes them of potential use in controlling other nanoscale structures, which suggests they will have an important role in nanotechnology engineering. The highest tensile strength of an individual multi-walled carbon nanotube has been tested to be 63 GPa. Carbon nanotubes were found in Damascus steel from the 17th century, possibly helping to account for the legendary strength of the swords made of it. Recently, several studies have highlighted the prospect of using carbon nanotubes as building blocks to fabricate three-dimensional macroscopic (>1mm in all three dimensions) all-carbon devices. Lalwani et al. have reported a novel radical initiated thermal crosslinking method to fabricated macroscopic, free-standing, porous, all-carbon scaffolds using single- and multi-walled carbon nanotubes as building blocks. These scaffolds possess macro-, micro-, and nano- structured pores and the porosity can be tailored for specific applications. These 3D all-carbon scaffolds/architectures may be used for the fabrication of the next generation of energy storage, supercapacitors, field emission transistors, high-performance catalysis, photovoltaics, and biomedical devices and implants. CNTs are potential candidates for future via and wire material in nano-scale VLSI circuits. Eliminating electromigration reliability concerns that plague modern Cu interconnects, isolated (single and multi-wall) CNTs can carry current densities in excess of 1000 MA/cm2 without electromigration damage.
Sources: en.wikipedia.org
SR9009 is a synthetic compound investigated as an agonist of the nuclear receptors REV-ERBα and REV-ERBβ. It is used in preclinical research on circadian rhythm and metabolism. It is not an approved drug.
No. It has no approved medical indication, and human safety and efficacy data are limited. It appears in research chemical markets and is banned by some sports authorities.
Natural ligands include heme and certain metabolites; SR9009 is a synthetic small molecule with higher potency and selectivity in some assays. Its effects depend on cell type and timing. It is not a naturally occurring compound.
It is a synthetic REV-ERB agonist used mainly in preclinical research. It is not an approved medicine for human use.