NR1D1 raises a handful of sensible questions. This page answers them in order, starting with the fundamentals and moving to applications.
Reviewed 2026-08-01. Anything still debated is marked as such rather than presented as settled.
SR9009 is a synthetic small molecule studied as an agonist of REV-ERB nuclear receptors. REV-ERB alpha and REV-ERB beta help regulate circadian rhythms and metabolic gene expression. In laboratory research, SR9009 has been used to probe how these receptors affect skeletal muscle, liver, and adipose tissue. The compound was identified in academic drug-discovery work and is often described in scientific literature by its chemical name and research code. It is not an approved medicine, and human clinical data remain limited or absent.
SR9009 binds REV-ERB receptors and alters their repressive activity on target genes. This action can change transcription of genes involved in lipid handling, glucose metabolism, and mitochondrial function. In rodent studies, treated animals have shown changes in muscle oxidative capacity and exercise performance, though effects vary by dose, duration, and model. The precise molecular steps connecting receptor binding to whole-body outcomes are still an active area of investigation. Findings in animals do not automatically translate to humans.
Because REV-ERB receptors are core clock components, SR9009 has been examined for effects on daily rhythms as well as metabolism. Research has explored whether the compound can shift or reinforce circadian gene expression in tissues such as liver and muscle. Some studies report improved metabolic markers in obese or diabetic mice, while others show context-dependent responses. Questions remain about which effects are direct, which are secondary to timing, and how they might differ across species.
Storage recommendations for SR9009 reference material typically specify a freezer at -20 °C or lower, with protection from moisture and light. Repeated freeze-thaw cycles can degrade small molecules and introduce variability. Stock solutions in dimethyl sulfoxide are often aliquoted to avoid repeated handling. Stability studies may examine degradation under heat, humidity, and light exposure. The compound's thiophene and nitro groups can participate in reactions that alter analytical signals over time, so such changes affect quantitative results.
Quality control for research materials includes identity confirmation by nuclear magnetic resonance and purity assessment by high-performance liquid chromatography. Mass spectrometry provides molecular weight confirmation and can detect related impurities. Purchasers should request a certificate of analysis that lists lot-specific data. Online products advertised for human use often lack such documentation. Distinguishing legitimate research material from mislabeled or contaminated samples is a recurring challenge in independent testing, and independent laboratories may use orthogonal methods to verify identity.
Detection of SR9009 in biological samples usually relies on liquid chromatography coupled to tandem mass spectrometry. This approach separates the compound from matrix components and identifies it by mass transitions. Because SR9009 can undergo metabolism, laboratories often look for both parent drug and specific metabolites. Sample preparation may involve protein precipitation or solid-phase extraction. Method validation examines sensitivity, carryover, and interference from related substances, and reference standards are required for accurate calibration.
| Property | Value | Notes |
|---|---|---|
| Chemical class | Synthetic REV-ERB agonist | Small-molecule nuclear receptor ligand |
| Appearance | Off-white to pale yellow solid | Typical for research-grade powder |
| Solubility class | Soluble in DMSO; low water solubility | Common stock solutions use organic solvent |
| Typical stock solvent | Dimethyl sulfoxide | Used for laboratory assays |
| Common analytical method | HPLC with UV or mass detection | Used for identity and purity checks |
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.
Handling practices for SR9009 focus on minimizing degradation and contamination. The solid is generally stored desiccated at or below -20 °C, protected from light and moisture. Stock solutions are often prepared in dimethyl sulfoxide or ethanol, then aliquoted to avoid repeated freeze–thaw cycles. Aqueous solubility is low, so formulations for animal studies may require cosolvents or suspending agents. Personnel should follow institutional chemical safety procedures, because toxicological data for humans are incomplete.
Regulatory status varies by country and intended use. Major drug agencies have not granted marketing authorization for SR9009 as a medicine, and it is not listed as a controlled substance in many jurisdictions. It is often sold as a research chemical, a category that may fall outside pharmaceutical manufacturing rules. Buyers should verify local laws and supplier documentation, including certificates of analysis. The lack of standardized quality controls raises concerns about identity, purity, and actual content in products marketed online.
Maryanoff (born 1949), American organic/medicinal chemist Maud Menten (1879–1960), Canadian biochemist Helen Vaughn Michel (born 1932), American nuclear chemist Alexandra Navrotsky (born 1943), American geochemist Dorothy Virginia Nightingale (1902–2000), American organic chemist Yolanda Ortiz (chemist) (1924–2019), Argentine chemist, environmentalist Kathlyn Parker, American organic chemist Emma Parmee, British-born medicinal/organic chemist Marguerite Perey (1909–1975), French physicist, student of Marie Curie, discovered the element francium in 1939 Mary Engle Pennington (1872–1952), American food chemist Eva Philbin (1914–2005), Irish chemist Iphigenia Photaki (1921–1983), Greek organic chemist Darshan Ranganathan (1941–2001), Indian organic chemist Mildred Rebstock (1919–2011), American Pharmaceutical chemist Sibyl Martha Rock (1909–1981), American pioneer in mass spectrometry and computing Elizabeth Rona (1890–1981), Hungarian (naturalized American) nuclear chemist and polonium expert Mary Swartz Rose (1874–1941), Nutrition chemist Melanie Sanford (born 1975), American organic chemist Maxine L. Savitz, American Chemist Patsy Sherman (1930–2008), American chemist, co-inventor of Scotchgard Odette L.
The "legume lectins" refer to a family of lectins found in plants, originally found in legumes but later shown to be present in non-legume plants as well. The function of them is still uncertain. Once thought to be necessary for rhizobia binding, this proposed function was ruled out through lectin-knockout transgene studies. The large concentration of lectins in plant seeds decreases with growth, and suggests a role in plant germination and perhaps in the seed's survival itself. The binding of glycoproteins on the surface of parasitic cells also is believed to be a function. Several plant lectins have been found to recognize noncarbohydrate ligands that are primarily hydrophobic in nature, including adenine, auxins, cytokinin, and indole acetic acid, as well as water-soluble porphyrins. These interactions may be physiologically relevant, since some of these molecules function as phytohormones. Lectin receptor kinases (LecRKs) are believed to recognize damage associated molecular patterns (DAMPs), which are created or released from herbivore attack. In Arabidopsis, legume-type LecRKs Clade 1 has 11 LecRK proteins. LecRK-1.8 has been reported to recognize extracellular NAD molecules and LecRK-1.9 has been reported to recognize extracellular ATP molecules. Extraction of proteins and lectins can be extracted via similar processes, also with their analysis, and discovery. For example cottonseed contains compounds of interest within the studies of extraction and purification of proteins
=== Sonolysis === Another method for the experimental generation of gold particles is by sonolysis. The first method of this type was invented by Baigent and Müller. This work pioneered the use of ultrasound to provide the energy for the processes involved and allowed the creation of gold particles with a diameter of under 10 nm. In another method using ultrasound, the reaction of an aqueous solution of HAuCl4 with glucose, the reducing agents are hydroxyl radicals and sugar pyrolysis radicals (forming at the interfacial region between the collapsing cavities and the bulk water) and the morphology obtained is that of nanoribbons with width 30–50 nm and length of several micrometers. These ribbons are very flexible and can bend with angles larger than 90°. When glucose is replaced by cyclodextrin (a glucose oligomer), only spherical gold particles are obtained, suggesting that glucose is essential in directing the morphology toward a ribbon.
Despite Arab objections, the ad hoc committee reported on 19 November 1947 in favour of a partition of Palestine. The United Nations General Assembly voted on 29 November 1947 in favour of the Partition Plan for Palestine, all the Arab League states voting against the Plan. The Arab Higher Committee rejected the vote, declaring it invalid because it was opposed by Palestine's Arab majority. The AHC also declared a three-day strike and public protest to begin on 2 December 1947, in protest at the vote. The call led to the 1947 Jerusalem riots between 2–5 December 1947, resulting in many deaths and much property damage. On 12 April 1948, with the end of the mandate looming, the Arab League announced its intention to take over the whole of the British Mandate territory, with the objective being:
Sources: en.wikipedia.org
Just like phagocytes, pathogens may evade or infect neutrophils. Some bacterial pathogens evolved various mechanisms such as virulence molecules to avoid being killed by neutrophils. These molecules collectively may alter or disrupt neutrophil recruitment, apoptosis or bactericidal activity. Neutrophils can also serve as host cell for various parasites that infect them avoiding phagocytosis, including:
Panamanian President Juan Carlos Varela announced Noriega's death shortly before midnight, writing, "The death of Manuel A. Noriega closes a chapter in our history; his daughters and his relatives deserve to bury him in peace." Noriega was cremated.
Human herpesvirus 6 (HHV-6) is the common collective name for human herpesvirus 6A (HHV-6A) and human herpesvirus 6B (HHV-6B). These closely related viruses are two of the nine known herpesviruses that have humans as their primary host. HHV-6A and HHV-6B are double-stranded DNA viruses within the Betaherpesvirinae subfamily and of the genus Roseolovirus. HHV-6A and HHV-6B infect almost all of the human populations that have been tested. HHV-6A has been described as more neurovirulent, and as such is more frequently found in patients with neuroinflammatory diseases such as multiple sclerosis. HHV-6 (and HHV-7) levels in the brain are also elevated in people with Alzheimer's disease. HHV-6B primary infection is the cause of the common childhood illness exanthema subitum (also known as roseola infantum or sixth disease). It is passed on from child to child. It is uncommon for adults to contract this disease as most people have had it by kindergarten, and once contracted, immunity arises and prevents future reinfection. Additionally, HHV-6B reactivation is common in transplant recipients, which can cause several clinical manifestations such as encephalitis, bone marrow suppression, and pneumonitis. A variety of tests are used in the detection of HHV-6, some of which do not differentiate the two species. Both viruses can cause transplacental infection and be passed on to a newborn.
One test is for antibodies against the acetylcholine receptor; the test has a reasonable sensitivity of 80–96%, but in ocular myasthenia, the sensitivity falls to 50%. A proportion of the people without antibodies against the acetylcholine receptor have antibodies against the MuSK protein. Less than 1% of patients with myasthenia gravis have antibodies against low-density lipoprotein receptor-related protein 4 (i.e., LRP4). In suspicious situations, testing can be performed for the similar symptomatic Lambert-Eaton syndrome.
The second main legislative body is the Council of the European Union, which is composed of different ministers of the member states. The heads of government of member states also convene a "European Council" (a distinct body) that the TEU article 15 defines as providing the 'necessary impetus for its development and shall define the general political directions and priorities'. It meets each six months and its President (currently former Belgian Prime Minister Charles Michel) is meant to 'drive forward its work', but it does not itself exercise 'legislative functions'. The Council does this: in effect this is the governments of the member states, but there will be a different minister at each meeting, depending on the topic discussed (e.g. for environmental issues, the member states' environment ministers attend and vote; for foreign affairs, the foreign ministers, etc.). The minister must have the authority to represent and bind the member states in decisions. When voting takes place it is weighted inversely to member state size, so smaller member states are not dominated by larger member states. In total there are 352 votes, but for most acts there must be a qualified majority vote, if not consensus. TEU article 16(4) and TFEU article 238(3) define this to mean at least 55 per cent of the Council members (not votes) representing 65 per cent of the population of the EU: currently this means around 74 per cent, or 260 of the 352 votes. This is critical during the legislative process.
Sources: en.wikipedia.org
== Cause == This disorder is caused by a mutation in a gene, TANGO2, which codes for protein Transport and golgi organization 2 homolog, and its located on chromosome 22. According to one study, exons 3-9 are frequently deleted in people of European origin and Hispanic ethnicity, although in Hispanic ethnicity c.460G>A (which is expressed as p.Gly154Arg, which means that on position 154, glycine is changed to arginine) is also frequent. Also, people with 22q11.2DS (DiGeorge syndrome) are at risk of developing this disorder because of hemizygosity (which means that they express only one copy of that gene, consequently chances of getting this disorder is higher).
In addition, although the amide of asparagine is a weak nucleophile, it can serve as an attachment point for glycans. Rarer modifications can occur at oxidized methionines and at some methylene groups in side chains. Post-translational modification of proteins can be experimentally detected by a variety of techniques, including mass spectrometry, Eastern blotting, and Western blotting.
Generally, seasonal fruits serve as the most common form of dessert consumed after dinner. Dim sum (点心), originally means a small portion of food, can refer to dessert, or pastries. Later to avoid disambiguation, tian dian (甜点) and gao dian (糕点) are used to describe desserts and pastries. Traditionally, Chinese desserts are sweet foods and dishes that are served with tea, usually during the meal, or at the end of meals in Chinese cuisine. Besides being served as dim sum along with tea, pastries are used for celebration of traditional festivals. The most famous one is moon cake, used to celebrate the Mid-Autumn Festival. A wide variety of Chinese desserts are available, mainly including steamed and boiled sweet snacks. Bing is an umbrella term for all breads in Chinese, also including pastries and sweets. These are baked wheat-flour-based confections, with different stuffings including red bean paste, jujube, and a variety of others. Su (酥) is another kind of pastry made with more amount of oil, making the confection more friable. Chinese candies and sweets, called táng (糖) are usually made with cane sugar, malt sugar, honey, nuts, and fruit. Gao or Guo are rice-based snacks that are typically steamed and may be made from glutinous or normal rice. Another cold dessert is called baobing, which is shaved ice with sweet syrup. Chinese jellies are known collectively in the language as ices. Many jelly desserts are traditionally set with agar and are flavoured with fruits, known as guodong (果冻), though gelatine based jellies are also common in contemporary desserts.
As of August 2022, the total road network in Jammu and Kashmir encompasses 41,141 km. There are 11 national highways, together constituting 1,752.16 km. The responsibility for road maintenance and development is distributed among multiple agencies, with the Roads & Buildings (R&B) department managing 10,461 km in Jammu division and 13,953.9 km in Kashmir division, while PMGSY oversees 6,878 km in Jammu and 3,415.4 km in Kashmir. The Border Roads Organisation, NHAI, and NHIDCL collectively manage 4,439.3 km of strategic roads. The Jammu–Srinagar National Highway, a segment of the NH44, is the main highway in the territory connecting the two capitals by road. National Highways 1, 144, 144A, 444, 501, 701, and 701A are the other NHs in the territory. The Jammu-Srinagar National Highway is enhanced by structures like the 9 km Chenani–Nashri Tunnel. This tunnel bypasses 41 km of road length and reduces travel time by 2 hours. The Mughal Road provides an alternative 84 km route connecting Shopian district with the Poonch and Rajouri districts. This route was originally used by Mughal Emperor Akbar to conquer Kashmir and served as an ancient trade pathway. Despite its historical significance and scenic value, the route faces seasonal accessibility challenges due to heavy snowfall and remains closed during winter months.
Sources: en.wikipedia.org
SR9009 is a synthetic research compound that acts on REV-ERB nuclear receptors. It is not approved for human use and is sold only as a research chemical. Its effects have been studied mainly in cells and rodents.
It binds REV-ERB alpha and REV-ERB beta and changes the expression of genes tied to metabolism and circadian rhythm. These changes can affect mitochondria and energy use in animal models. The exact chain from receptor binding to physiological outcome is still being mapped.
No reliable human trials show that SR9009 improves athletic performance. Some rodent studies report endurance changes, but these results are not proof of human benefit. Its use in sport is prohibited, and quality and safety data are lacking.
Liquid chromatography-tandem mass spectrometry is a common approach. It can detect the parent compound and its metabolites in biological matrices.