The short version of metabolic modulator fits in a sentence. The long version — which is the one that helps — is below.
This page was last updated on 2026-03-18 and is reviewed periodically as new material appears.
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.
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.
Detection of SR9009 in biological samples usually employs liquid chromatography coupled with tandem mass spectrometry. This method can identify the parent compound and sometimes metabolites in urine or blood. Because exposure can be low and clearance may be rapid, sample timing and limits of detection matter. Laboratories validate assays for sensitivity and specificity. Results are interpreted alongside chain-of-custody and quality-control records. Urine is the common matrix for anti-doping analysis, while blood may be used in research settings.
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.
| 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 |
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.
The availability of GFP and its derivatives has thoroughly redefined fluorescence microscopy and the way it is used in cell biology and other biological disciplines. While most small fluorescent molecules such as FITC (fluorescein isothiocyanate) are strongly phototoxic when used in live cells, fluorescent proteins such as GFP are usually much less harmful when illuminated in living cells. This has triggered the development of highly automated live-cell fluorescence microscopy systems, which can be used to observe cells over time expressing one or more proteins tagged with fluorescent proteins. There are many techniques to utilize GFP in a live cell imaging experiment. The most direct way of utilizing GFP is to directly attach it to a protein of interest. For example, GFP can be included in a plasmid expressing other genes to indicate a successful transfection of a gene of interest. Another method is to use a GFP that contains a mutation where the fluorescence will change from green to yellow over time, which is referred to as a fluorescent timer. With the fluorescent timer, researchers can study the state of protein production such as recently activated, continuously activated, or recently deactivated based on the color reported by the fluorescent protein. In yet another example, scientists have modified GFP to become active only after exposure to irradiation giving researchers a tool to selectively activate certain portions of a cell and observe where proteins tagged with the GFP move from the starting location.
=== Irisin === Irisin, a newly identified hormone, was first reported by Bostromet al. in 2012, is a novel myokine which plays an important role in the homeostasis, metabolism and energy balance. Irisin is reported to be involved in insulin resistance in both humans and animal models. Circulating irisin levels progressively decrease with the worsening of the glucose tolerance. A recent study conducted a comparative cross-sectional evaluation of baseline circulating levels of the novel hormone Irisin and the established adipokine adiponectin with metabolic syndrome, cardio-metabolic variables and cardiovascular disease risk, and they found out that the baseline irisin levels were significantly higher in subjects with metabolic syndrome than in subjects without metabolic syndrome.
=== EC 1.14.12 With NADH or NADPH as one donor, and incorporation of two atoms of oxygen into one donor === EC 1.14.12.1: anthranilate 1,2-dioxygenase (deaminating, decarboxylating) EC 1.14.12.2: Now EC 1.14.13.35 anthranilate 3-monooxygenase (deaminating) EC 1.14.12.3: benzene 1,2-dioxygenase EC 1.14.12.4: EC 1.14.13.242, 3-hydroxy-2-methylpyridinecarboxylate monooxygenase EC 1.14.12.5: Now EC .14.13.241, 5-pyridoxate monooxygenase EC 1.14.12.6: Now EC 1.14.13.66, 2-hydroxycyclohexanone 2-monooxygenase EC 1.14.12.7: phthalate 4,5-dioxygenase EC 1.14.12.8: 4-sulfobenzoate 3,4-dioxygenase EC 1.14.12.9: 4-chlorophenylacetate 3,4-dioxygenase EC 1.14.12.10: benzoate 1,2-dioxygenase EC 1.14.12.11: toluene dioxygenase EC 1.14.12.12: naphthalene 1,2-dioxygenase EC 1.14.12.13: 2-halobenzoate 1,2-dioxygenase EC 1.14.12.14: 2-aminobenzenesulfonate 2,3-dioxygenase EC 1.14.12.15: terephthalate 1,2-dioxygenase EC 1.14.12.16: 2-hydroxyquinoline 5,6-dioxygenase EC 1.14.12.17: nitric oxide dioxygenase EC 1.14.12.18: biphenyl 2,3-dioxygenase EC 1.14.12.19: 3-phenylpropionate dioxygenase EC 1.14.12.20: Now classified as EC 1.14.15.17, pheophorbide a oxygenase. EC 1.14.12.21: Now EC 1.14.13.208, benzoyl-CoA 2,3-epoxidase EC 1.14.12.22: carbazole 1,9a-dioxygenase EC 1.14.12.23: nitroarene dioxygenase EC 1.14.12.24: 2,4-dinitrotoluene dioxygenase EC 1.14.12.25: p-cumate 2,3-dioxygenase EC 1.14.12.26: chlorobenzene dioxygenase
=== Endodontic treatment === It is a point of interest in endodontics, as it is considered necessary to thoroughly chemomechanically debride the pulp space to remove all necrotic tissue and minimise bacterial load in the pulp space. Ideally, this debridement would terminate exactly at the apical foramen. In reality, determining the exact position of the apical foramen is problematic, requiring radiography and/or use of an electronic apex locator to produce a refined estimate. A tooth may have multiple small accessory canals in the root apex area forming an apical delta which can complicate the endodontic problem. The presence of an apical delta may make successful endodontic treatment less likely. The root tip is removed during apicoectomy to eliminate the apical delta and maximise the chance of successful healing. An apical constriction is often present. In immature teeth the root is not fully formed, leading to an open apex. This is also seen in some pathological teeth. During endodontic treatment, the apical foramen serves to determine the working length. Accurate working length determination is important to decrease or prevent postoperative pain and delayed healing caused by overinstrumentation and overfilling, as well as to avoid inadequate debridement and underfilling of the canal that may result from an under-extended working length short of the apical foramen.
Sources: en.wikipedia.org
The vote proved to be only symbolic as it was subsequently overruled by a vote in the House of Commons following a tactical pivot and variety of promises made by Churchill. In February 1923, following the change in government, Cavendish, in a lengthy memorandum for the Cabinet, laid the foundation for a secret review of Palestine policy:
Melanocytes are melanin-producing neural crest-derived cells located in the bottom layer (the stratum basale) of the skin's epidermis, the middle layer of the eye (the uvea), the inner ear, vaginal epithelium, meninges, bones, and heart found in many mammals and birds. Melanin is a dark pigment primarily responsible for skin color. Once synthesized, melanin is contained in special organelles called melanosomes which can be transported to nearby keratinocytes to induce pigmentation. Thus darker skin tones have more melanosomes present than lighter skin tones. Functionally, melanin serves as protection against UV radiation. Melanocytes also have a role in the immune system.
=== Republic of Zimbabwe (1980) === On 18 April 1980, the country became independent within the Commonwealth of Nations as the Republic of Zimbabwe, and its capital, Salisbury, was renamed Harare two years later.
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.
Its legal status depends on the country and intended use. It is not an approved medicine in major jurisdictions. In sport, it is prohibited by anti-doping rules.