REV-ERB agonist raises a handful of sensible questions. This page answers them in order, starting with the fundamentals and moving to applications.
Reviewed 2025-11-27. Anything still debated is marked as such rather than presented as settled.
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.
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.
SR9009 stability depends on temperature, moisture, light, and solvent. Solid material is generally kept cool and dry, while solutions may require protection from repeated warming and cooling. Degradation can appear as color changes, precipitate, or new chromatographic peaks. Researchers should follow supplier instructions and their own stability data. Long-term storage conditions for human use have not been established because the compound lacks approved clinical formulation.
SR9009 is supplied as a solid research chemical, often in milligram quantities. Laboratories typically weigh it in a controlled environment because fine powders can disperse. Stock solutions are commonly prepared in dimethyl sulfoxide and stored in small aliquots to reduce freeze-thaw cycles. Personal protective equipment and chemical fume hoods are standard when handling unknown or potent compounds. These practices address laboratory safety rather than human use.
| Property | Value | Notes |
|---|---|---|
| Typical storage temperature | -20 °C or lower | Desiccated and protected from light |
| Common analytical method | LC-MS/MS | Detects parent drug and metabolites |
| Solubility class | Lipophilic; soluble in organic solvents | Low aqueous solubility |
| Molecular weight | 437.94 g/mol | Calculated from reported formula |
| Synonyms | SR9009; REV-ERB agonist | Code name used in scientific literature |
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.
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.
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.
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.
Necrobiosis Lipoidica is a rare, chronic skin condition predominantly associated with diabetes mellitus (known as necrobiosis lipoidica diabeticorum or NLD). It can occur in individuals with rheumatoid arthritis or without any underlying conditions (idiopathic). It can also occur in patients with obesity, hypertension, celiac disease, and metabolic syndrome. Approximately a quarter of Necrobiosis Lipoidica cases are associated with diabetes mellitus. The broader overarching definition of necrobiosis is a gradual physiological death of a cell. It can be caused by basophilia, erythema, or a tumor. As a dermapathology term, it refers to altered collagen or altered dermal connective tissue. Necrobiosis Lipoidica is linked to microvascular damage and collagen degeneration. The exact cause of this condition is not known. It involves collagen degeneration and a granulomatous response in the layer of the skin called the dermis, often affecting the deeper fat layer and thickening dermal blood vessels. It is characterized by hardened, raised areas of the skin, often appearing on the shins, with a yellowish center and a surrounding dark pink area. The lesions are generally asymptomatic but can become tender and ulcerate when injured. Histological features and skin changes are caused by thickening of the blood vessel wall, collagen deterioration, granuloma (clustered white blood cells in tissues) formation, and fat deposits. Necrobiosis Lipoidica has many possible contributing factors, and research for treatment and causes is an ongoing process.
=== Genetics === A familial tendency to develop autoimmune diseases suggests a genetic component. Some conditions, like lupus and multiple sclerosis, often occur in several members of the same family, indicating a potential hereditary link. Additionally, certain genes have been identified that increase the risk of developing specific autoimmune diseases.
== Overview == FACIT collagens have interruptions in their triple helical structure. They are involved in assembling fibrillar collagens and other ECM components. Interruptions in the triple helical structure of FACIT collagens occur due to the presence of non-triple helical domains within the collagen molecule. These collagens are typically found alongside fibrillar collagens in various tissues and organs. Fibril-associated collagens with interrupted triple helices (FACIT collagens) are a subset of collagens that contribute to the organization and stabilization of the extracellular matrix (ECM). These collagens are typically found alongside fibrillar collagens in various tissues and organs. These domains vary in length and composition and provide flexibility and additional binding sites for other components of the extracellular matrix. There are eight known types of FACIT collagens: collagens IX, XII, XIV, XVI, XIX, XXI, and XXII. The general FACIT collagen structure contains short triple helical COL domains (COL1, COL2, COL3) interrupted by NC domains with an N-terminal NC domain facing toward the interfibrillar space. FACIT collagen is found in various tissue areas to modulate the surface properties of collagen fibrils and generate tissue-specific three-dimensional patterns in the extracellular matrix. For example, collagen XIV connects the fibrillar networks of the cartilage and skin, and XII is found in connective tissues, particularly at the tendons, ligaments, and periodontium.
Collagen is the main component of the extracellular matrix (ECM). The collagen superfamily consists of 28 different types of collagen. Although the function and hierarchical structure of these collagens may vary, they all share the defining structural feature known as the triple helix, where three left handed polyproline II-type (PPII) helices assemble to form a right-handed supercoiled helical motif. Short synthetic peptides known as collagen mimetic peptides (CMPs) or collagen-like peptides (CLPs) have played a major role in elucidating the 3D structure of the collagen triple helix, its folding kinetics, and thermal stability as small triple helical models. CMPs, CLPs, and CHPs are all very similar in terms of their amino acid sequences but only when CMPs or CLPs are heated above their melting temperatures, do they exist in the dissociated, single-stranded state and can be considered as CHPs.
Type I collagen production is inhibited by the inability of the altered procollagen strands to associate and form the triple-stranded, ropelike structure of mature collagen. These alterations negatively affect tissues that are rich in type I collagen, such as the skin, bones, teeth, and tendons, leading to the signs and symptoms of type III osteogenesis imperfecta. Osteogenesis imperfecta, type IV: Several different types of mutations in the COL1A1 gene cause osteogenesis imperfecta type IV. These mutations may involve missing pieces of the COL1A1 gene or changes in base pairs (the building blocks of DNA). These gene alterations result in a protein that is missing segments or has amino acid substitutions; specifically, the amino acid glycine is replaced by another amino acid. All of these changes interfere with the formation of the mature triple-stranded collagen molecule and prevent the production of mature type I collagen, which results in type IV osteogenesis imperfecta. Osteoporosis: Osteoporosis is a condition that makes bones progressively more brittle and prone to fracturing. A particular variation (polymorphism) in the COL1A1 gene appears to increase the risk of developing osteoporosis. A specific variation at Sp1 binding site is shown to be associated with increased risk of low bone mass and vertebral fracture, because of the changes the COL1A1 protein produced from one copy of the gene. Several studies have shown that women with this particular genetic variation at Sp1 site are more likely to have signs of osteoporosis than are women without the variation.
Sources: en.wikipedia.org
==== Implants ==== Collagen implants or dermal fillers are also used to address the appearance of wrinkles, contour deficiencies, and acne scars, among others. The U.S. Food and Drug Administration has approved its use, and identifies cow (bovine) and human cells as the sources of these fillers. According to the FDA, the desired effects can last for 3–4 months, which is relatively the most short-lived compared to other materials used for the same purpose.
=== Biotechnology === Gelatin is also used in synthesizing hydrogels for tissue engineering applications. Its collagen-like structure makes it a useful extracellular matrix in 3D cell culture. Gelatin is also used as a saturating agent in immunoassays, and as a coat. Gelatin degradation assay allows visualizing and quantifying invasion at the subcellular level instead of analyzing the invasive behavior of whole cells, for the study of cellular protrusions called invadopodia and podosomes, which are protrusive structures in cancer cells and play an important role in cell attachment and remodeling of the extracellular matrix (ECM).
==== Ultrastructure and collagen synthesis ==== Collagen fibres coalesce into macroaggregates. After secretion from the cell, cleaved by procollagen N- and C-proteases, the tropocollagen molecules spontaneously assemble into insoluble fibrils. A collagen molecule is about 300 nm long and 1–2 nm wide, and the diameter of the fibrils that are formed can range from 50–500 nm. In tendons, the fibrils then assemble further to form fascicles, which are about 10 mm in length with a diameter of 50–300 μm, and finally into a tendon fibre with a diameter of 100–500 μm. The collagen in tendons are held together with proteoglycan (a compound consisting of a protein bonded to glycosaminoglycan groups, present especially in connective tissue) components including decorin and, in compressed regions of tendon, aggrecan, which are capable of binding to the collagen fibrils at specific locations. The proteoglycans are interwoven with the collagen fibrils – their glycosaminoglycan (GAG) side chains have multiple interactions with the surface of the fibrils – showing that the proteoglycans are important structurally in the interconnection of the fibrils. The major GAG components of the tendon are dermatan sulfate and chondroitin sulfate, which associate with collagen and are involved in the fibril assembly process during tendon development. Dermatan sulfate is thought to be responsible for forming associations between fibrils, while chondroitin sulfate is thought to be more involved with occupying volume between the fibrils to keep them separated and help withstand deformation.
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==== New Zealand ==== Rosiglitazone was withdrawn from the New Zealand market April 2011 because Medsafe concluded the suspected cardiovascular risks of the medicine for patients with type 2 diabetes outweigh its benefits.
Sources: en.wikipedia.org
At 80 years old, Donald Trump, the 45th and 47th president of the United States, became the oldest person in American history to become president upon his second inauguration in 2025. In July 2024, five weeks after his 78th birthday, he became the oldest presidential nominee of a major party. Should he serve as president until at least August 15, 2028, he would be the oldest sitting president in American history. On January 20, 2029, the end of his second term, he would be 82 years, seven months, and six days old. Since the early days of Trump's 2016 presidential campaign, his physical and mental health have been debated. Trump was 70 years old when he first took office, surpassing Ronald Reagan as the oldest person to assume the presidency. Trump's age, weight, lifestyle, and history of heart disease raised questions about his physical health. Some psychiatrists and reporters have speculated that Trump may have mental health impairments, such as dementia (which his father had), attention deficit hyperactivity disorder or narcissistic personality disorder. Such claims have prompted discussion about the ethics and applicability of the Goldwater rule, which prohibits mental health professionals from publicly diagnosing or discussing the diagnosis of public figures without their consent and direct examination. Public opinion polling from July 2024 indicated an increase in the percentage of Americans concerned about his fitness for a second term.
=== Physiological factors === Physiological changes in nursing women, including an unusual milk supply and blocked milk ducts, cause nipple or breast ache. An oversupply of breast milk is caused by overactive milk expression. Hence, the excess milk accumulates, leading to breast engorgement and pain. On the other hand, milk supply will be lowered by prolonged breastfeeding, high pumping pressure and overly vigorous breast massage. Blocked milk ducts refers to lactiferous ducts' blockage at the nipple pore or deeper breast tissue. It hampers an adequate drainage of milk and causes breast mass, engorgement, redness, a nipple bleb and subsequent pain.
The treaty did not cover sea-launched missiles, but it did include mutual on-site inspections by both nations to ensure compliance within a three-year period. By May 1991, after on-site investigations by both sides, 2,700 missiles had been destroyed. The Reagan administration also persuaded the Saudi Arabian oil companies to increase oil production. This led to a drop in the price of oil, at a time when oil was the main source of Soviet export revenues. Following the USSR's previous large military buildup, President Reagan ordered an enormous peacetime defense buildup of the United States Armed Forces; the Soviets did not respond to this by building up their military because the military expenses, in combination with collectivized agriculture in the nation, and inefficient planned manufacturing, would cause a heavy burden for the Soviet economy. It was already stagnant and in a poor state prior to the tenure of Mikhail Gorbachev who, despite significant attempts at reform, was unable to revitalise the economy. Recognizing the unsustainable burden of military spending on the Soviet GDP, the growing costs of sustaining allied and satellite regimes, systemic barriers to technological innovation, and declining domestic living standards, Gorbachev pursued a program of radical economic modernization. The implications of these combined factors were vast, leading Gorbachev to begin changing the regime's political tone.
Açaí oil is suitable for cooking or as a salad dressing, but is mainly used in cosmetics as shampoos, soaps or skin moisturizers. The oil compartments in açaí fruit contain polyphenols such as procyanidin oligomers and vanillic acid, syringic acid, p-hydroxybenzoic acid, protocatechuic acid, and ferulic acid, which were shown to degrade substantially during storage or exposure to heat. Although these compounds are under study for potential health effects, there remains no substantial evidence that açaí polyphenols have any effect in humans. Açaí oil is green in color, has a bland aroma, and is high in oleic and palmitic fatty acids.
A geroprotector aims to affect the root cause of aging and age-related diseases, and thus prolong the life span of animals. Some possible geroprotectors include melatonin, carnosine, metformin, rapamycin, nicotinamide mononucleotide (NMN), delta sleep-inducing peptide,glycine, and psilocin. Geroprotectors could belong to multiple classes, depending on which of the hallmarks of aging they influence. The distinction between geroprotectors and senotherapeutics is an evolving area of aging research. Geroprotectors broadly aim to target multiple mechanisms of aging, prolonging lifespan and healthspan by addressing the fundamental causes of aging. Senotherapeutics, on the other hand, are a subset of therapies that specifically target senescent cells, which are dysfunctional cells that accumulate with age and contribute to inflammation and age-related diseases.
Sources: en.wikipedia.org
Liquid chromatography-tandem mass spectrometry is a common approach. It can detect the parent compound and its metabolites in biological matrices.
Research samples are typically kept frozen, desiccated, and protected from light. Stock solutions are often aliquoted to reduce freeze-thaw cycles.
High-performance liquid chromatography and nuclear magnetic resonance are standard for purity and identity. Mass spectrometry confirms molecular weight.
Laboratories commonly use liquid chromatography coupled with mass spectrometry to detect SR9009. The method can identify the compound and estimate concentration in a sample. Detection limits depend on the matrix and instrument.