This is a working overview of Nuclear receptor, written for readers who want more than a one-paragraph summary but less than a textbook.
Reviewed 2026-08-01. Anything still debated is marked as such rather than presented as settled.
Safety discussions about cardarine frequently cite rodent carcinogenicity findings reported in the 2000s. In those studies, treated animals developed tumors at multiple sites, leading sponsors to discontinue clinical development. The relevance of these findings to humans has not been resolved, but they are a major reason the compound is not approved. Current literature emphasizes uncertainty about long-term effects and the risks of unregulated use. Regulators and health agencies have not established a safe human exposure level.
Cardarine is a synthetic compound also known as GW501516, GW-501516, and sometimes endurobol. It was developed as a selective agonist of peroxisome proliferator-activated receptor delta, a nuclear receptor involved in fatty acid oxidation and energy metabolism. The compound was studied in preclinical models for metabolic and cardiovascular conditions, but it did not become a marketed human medicine. In regulatory and anti-doping contexts, it is treated as a prohibited substance rather than a licensed medicine.
Cardarine is frequently described as a fat-burning or endurance-enhancing supplement, but these claims exceed the available evidence. The compound is not a hormone, steroid, or selective androgen receptor modulator. Research articles discuss it as a tool compound for studying PPARδ biology, while anti-doping literature focuses on its abuse and detection. Quality of unapproved products is uncertain, and independent analyses have found impurities or incorrect labeling. Open questions include whether human cancer risk resembles that seen in rodents and how often non-athletes use the substance.
Cardarine has no approved therapeutic indication and is not marketed as a medicine. The World Anti-Doping Agency lists GW501516 as a prohibited substance at all times, covering both in-competition and out-of-competition periods. National laws vary: some countries treat it as an unapproved drug subject to import controls, while others have specific restrictions on sale for human consumption. It is often sold as a research chemical, a label that does not imply safety or legality. Enforcement actions have targeted online vendors and shipments.
| Property | Value | Notes |
|---|---|---|
| Common synonyms | GW501516, GW-501516, GW 501516, endurobol | Names vary in research and anti-doping documents. |
| Chemical class | Synthetic PPARδ agonist | Small-molecule nuclear receptor ligand. |
| CAS Registry Number | 317318-70-0 | Identifier commonly associated with GW501516. |
| Appearance | White to off-white powder | Typical for purified research material. |
| Solubility | Low in water; soluble in DMSO and ethanol | Organic solvents are common for laboratory stock solutions. |
PPARδ is a nuclear receptor that influences transcription of genes involved in fatty acid oxidation, lipid transport, and energy homeostasis. GW501516 binds and activates this receptor with high selectivity relative to PPARα and PPARγ in laboratory assays. Activation alters expression of target genes in skeletal muscle, liver, and adipose tissue in animal models. The exact clinical consequences of these changes in humans remain incompletely characterized, and observed effects in animals do not establish therapeutic benefit or safety.
Published studies have examined GW501516 in animal models of obesity, insulin resistance, and exercise endurance. Early human trials reportedly ended, and development was discontinued after preclinical findings raised concerns about cancer in some rodent studies. Regulatory agencies have not approved cardarine for any medical use. Its availability through non-pharmaceutical channels raises questions about identity, purity, and legal status that are separate from its laboratory pharmacology. Those questions are often addressed through analytical testing rather than assumptions about product labels.
Cardarine is a common name for GW501516, also GW-1516, a synthetic compound developed as a peroxisome proliferator-activated receptor delta (PPARδ) agonist. It belongs to a class of agents that modulate gene transcription related to lipid and energy metabolism. The compound was studied in preclinical and early clinical research for metabolic and cardiovascular conditions, but it did not progress to approved therapeutic use. Its name appears in fitness and sports contexts despite not being approved as a drug.
Cardarine is prohibited in competitive sport under the World Anti-Doping Agency code, where it is classified as a metabolic modulator. It is not approved as a prescription medicine in the United States, European Union, or other major markets. Regulatory action has focused on its presence in sports and in products marketed as research chemicals. Because it has no accepted medical indication, supply is often unregulated. This status creates legal and safety uncertainties for anyone who encounters the substance.
Anti-doping laboratories detect GW501516 and its metabolites using liquid chromatography-tandem mass spectrometry. Urine is the most common matrix, though blood and dried blood spots may also be used in some programs. Detection depends on factors such as dose, timing, metabolism, and the sensitivity of the assay. Published methods describe limits of detection in the low nanogram per milliliter range for related compounds. Exact detection windows are not fixed for all situations and remain an area of ongoing study.
GW501516 acts on PPARδ, a nuclear receptor that helps regulate fatty acid oxidation and energy homeostasis. In animal studies, activation of this receptor was associated with increased endurance and changes in lipid metabolism. Human trials examined effects on blood lipids and other metabolic markers, but the compound did not advance to approval. Rodent studies later reported tumors in multiple tissues at doses used in those experiments. Whether those findings translate to human risk remains uncertain, and the clinical relevance of the animal data is still debated.
Regulatory bodies treat GW501516 as a prohibited substance in competitive sport. The World Anti-Doping Agency added it to the prohibited list, and it falls under classes covering metabolic modulators and hormone-related agents. It is not approved by drug regulators for human use, and it is not a lawful dietary supplement. Products sold under the cardarine name may contain unlisted ingredients or different compounds. Because no approved product exists, quality and identity are not guaranteed by pharmaceutical manufacturing standards.
Cardarine is a common name for the investigational chemical GW501516, also written GW-1516. It was developed as a peroxisome proliferator-activated receptor delta agonist for metabolic conditions such as dyslipidemia. Early research focused on lipid handling and energy use in skeletal muscle and other tissues. The compound was never approved as a medicine. In public discussion, it is often grouped with performance-enhancing substances, although its receptor target differs from that of anabolic steroids or selective androgen receptor modulators. Regulatory and health authorities have issued warnings about its use.
=== Genotoxicity === WHO concluded that patulin is genotoxic based on variable genotoxicity data, however it is considered a group 3 carcinogen by the International Agency for Research on Cancer (IARC) since data was inconclusive.
== Culinary and other uses == Fresh or dried peppermint leaves are often used alone in peppermint tea or with other herbs in herbal teas (tisanes, infusions). Peppermint is used for flavouring ice cream, candy, fruit preserves, alcoholic beverages, chewing gum, toothpaste, and some shampoos, soaps, and skin care products. Menthol activates cold-sensitive TRPM8 receptors in the skin and mucosal tissues, and is the primary source of the cooling sensation that follows the topical application of peppermint oil.
Ice-T appears in the film Gift. One of the last scenes includes Ice-T and Body Count playing with Jane's Addiction in a version of the Sly and the Family Stone song "Don't Call Me Nigger, Whitey". Besides fronting his own band and rap projects, Ice-T has also collaborated with other hard rock and metal bands, such as Icepick, Motörhead, Megadeth, Pro-Pain, and Six Feet Under. He has also covered songs by hardcore punk bands such as the Exploited, Jello Biafra, and Black Flag. Ice-T made an appearance at Insane Clown Posse's Gathering of the Juggalos (2008 edition). Ice-T was also a judge for the 7th annual Independent Music Awards to support independent artists. His 2012 film Something from Nothing: The Art of Rap features a who's who of underground and mainstream rappers. In November 2011, Ice-T announced via Twitter that he was in the process of collecting beats for his next LP which was expected sometime during 2012, but as of October 2014, the album has not been released. A new Body Count album, Bloodlust, was released in 2017. After the release of the album, responding to an interview question asking if he's "done with rap", he answered "I don't know" and noted that he's "really leaning more toward EDM right now". Body Count received their second Grammy nomination and later won the award at the 63rd Annual Grammy Awards in 2021 for "Best Metal Performance" with their song "Bum-Rush" from the album Carnivore. In July 2019, Ice-T released his first solo hip-hop track in 10 years, titled "Feds in My Rearview".
However, in cells lacking pyruvate carboxylase, AO monomers accumulate in the cytosol, indicating that pyruvate carboxylase has a second fully unrelated function in assembly and import. The function in AO import/assembly is fully independent of the enzyme activity of pyruvate carboxylase, because amino acid substitutions can be introduced that fully inactivate the enzyme activity of pyruvate carboxylase, without affecting its function in AO assembly and import. Conversely, mutations are known that block the function of this enzyme in the import and assembly of AO, but have no effect on the enzymatic activity of the protein. The E. coli antioxidant thioredoxin protein is another example of a moonlighting protein. Upon infection with the bacteriophage T7, E. coli thioredoxin forms a complex with T7 DNA polymerase, which results in enhanced T7 DNA replication, a crucial step for successful T7 infection. Thioredoxin binds to a loop in T7 DNA polymerase to bind more strongly to the DNA. The antioxidant function of thioredoxin is fully autonomous and fully independent of T7 DNA replication, in which the protein most likely fulfills the functional role. ADT2 and ADT5 are other examples of moonlighting proteins found in plants. Both of these proteins have roles in phenylalanine biosynthesis like all other ADTs. However ADT2, together with FtsZ is necessary in chloroplast division and ADT5 is transported by stromules into the nucleus.
In late June 2019, Pritzker signed the bipartisan capital bill named Rebuild Illinois, worth $45 billion to be spent in six years and estimated to create 540,000 jobs. It was the first capital-spending bill in Illinois in 10 years. The plan includes $33.2 billion for transportation projects, including $25 billion for road upgrades, with local governments deciding which roads they want to prioritize; $3.5 billion for public and private schools and universities; $1 billion for environmental protection; $420 million for expanding broadband Internet service to rural Illinois; $465 million for health care and human services facilities; and $1.8 billion for libraries, museums, and minority-owned businesses. Financing for this plan will come from multiple sources. The gas tax was set to match inflation since the last gas-tax increase in 1990, increasing from 19 cents per gallon to 38 cents; the special fuel tax on diesel, liquefied natural gas, and propane increased to 7.5 cents per gallon. Fuel taxes will be indexed to inflation. Vehicle registration fees increased by $50. The state's bonding authority will increase from $22.6 billion to $60.8 billion. Newly authorized casinos are expected to create thousands of jobs and deliver hundreds of millions of dollars in tax revenue for construction projects. Cook County municipalities may raise their own gas taxes by up to three cents per gallon, though Chicago mayor Lori Lightfoot said she opposed raising the gas tax in her city and increasing Chicago Transit Authority fares.
Sources: en.wikipedia.org
During this initial deployment, 36 soldiers from the division were killed and about 400 were wounded, out of about 12,000 deployed. On 21 July 2006, the 1st Battalion, 325th Infantry Regiment, along with a platoon from Battery A, 2nd Battalion, 319th Field Artillery Regiment and a troop from 1st Squadron, 73rd Cavalry Regiment deployed to Tikrit, Iraq, returning in December 2006.
=== Effects === As with peoples having migrated northward, those with light skin migrating toward the equator acclimatize to the much stronger solar radiation. Nature selects for less melanin when ultraviolet radiation is weak. Most people's skin darkens when exposed to UV light, giving them more protection when it is needed. This is the physiological purpose of sun tanning. Dark-skinned people, who produce more skin-protecting eumelanin, have a greater protection against sunburn and the development of melanoma, a potentially deadly form of skin cancer, as well as other health problems related to exposure to strong solar radiation, including the photodegradation of certain vitamins such as riboflavins, carotenoids, tocopherol, and folate. Melanin in the eyes, in the iris and choroid, helps protect from ultraviolet and high-frequency visible light; people with blue, green, and grey eyes are more at risk of sun-related eye problems. Furthermore, the ocular lens yellows with age, providing added protection. However, the lens also becomes more rigid with age, losing most of its accommodation—the ability to change shape to focus from far to near—a detriment due probably to protein crosslinking caused by UV exposure. Recent research suggests that melanin may serve a protective role other than photoprotection. Melanin is able to effectively chelate metal ions through its carboxylate and phenolic hydroxyl groups, often much more efficiently than the powerful chelating ligand ethylenediaminetetraacetate (EDTA).
A Rhodesian Trade Office was opened in Lisbon in order to co-ordinate breaking the anticipated sanctions in the event of a unilateral declaration of independence later that year, which encouraged Smith not to compromise. In its turn, the Rhodesian Trade Office in Lisbon functioned as a de facto embassy and caused tension with London, which objected to Rhodesia conducting its own foreign policy. As land-locked Rhodesia bordered the Portuguese colony of Mozambique, Salazar's promise of "maximum support" from Portugal in breaking the anticipated sanctions gave Smith more grounds for self-confidence in his talks with London. Smith ruled out acceptance for all five of the British principles as they stood, implying instead that Rhodesia was already legally entitled to independence—a claim that was overwhelmingly endorsed by the predominantly white electorate in a referendum. Emboldened by the results of this referendum and the subsequent general election, the Rhodesian government threatened to declare independence without British consent. Harold Wilson countered by warning that such an irregular procedure would be considered treasonous, although he specifically rejected using armed force to quell a rebellion by English "kith and kin", or white Rhodesians of predominantly British descent and origin, many of whom still possessed sympathies and family ties to the United Kingdom. Wilson's refusal to consider a military option further encouraged Smith to proceed with his plans.
=== Langerhans cell histiocytosis === The presence of multiple histiocytomas is now a well recognized syndrome. However, there is yet another presentation in which widespread cutaneous lesions histologically identical to histiocytoma are observed. Clinically, the lesions are almost confluent in affected regions. Rapid internal spread is observed and the affected animals have all been euthanized. There is one published account of such a case, and we have data on 3 dogs with what appears to be an identical syndrome.
Sources: en.wikipedia.org
Chain Home, or CH for short, was the codename for the ring of coastal early warning radar stations built by the Royal Air Force (RAF) before and during the Second World War to detect and track aircraft. Initially known as RDF, and given the official name Air Ministry Experimental Station Type 1 (AMES Type 1) in 1940, the radar units were also known as Chain Home for most of their life. Chain Home was the first early warning radar network in the world and the first military radar system to reach operational status. Its effect on the war made it one of the most powerful systems of what became known as the "Wizard War". In late 1934, the Tizard Committee asked radio expert Robert Watson-Watt to comment on the repeated claims of radio death rays and reports suggesting Germany had built some sort of radio weapon. His assistant, Arnold Wilkins, demonstrated that a death ray was impossible but suggested radio could be used for long-range detection. In February 1935, a successful demonstration was arranged by placing a receiver near a BBC short wave transmitter and flying an aircraft around the area. Using commercial short wave radio hardware, Watt's team built a prototype pulsed transmitter and, by June 1935, it detected an aircraft that happened to be flying past. Basic development was completed by the end of the year, with detection ranges on the order of 100 mi (160 km). In 1936, attention was focused on a production version, and early 1937 saw the addition of height finding.
German literature can be traced back to the Middle Ages and the works of writers such as Walther von der Vogelweide and Wolfram von Eschenbach. Well-known German authors include Johann Wolfgang von Goethe, Friedrich Schiller, Gotthold Ephraim Lessing and Theodor Fontane. The collections of folk tales published by the Brothers Grimm popularised German folklore on an international level. The Grimms also gathered and codified regional variants of the German language, grounding their work in historical principles; their Deutsches Wörterbuch, or German Dictionary, sometimes called the Grimm dictionary, was begun in 1838 and the first volumes published in 1854. Influential authors of the 20th century include Gerhart Hauptmann, Thomas Mann, Hermann Hesse, Heinrich Böll, and Günter Grass. The German book market is the third-largest in the world, after the United States and China. The Frankfurt Book Fair is the most important in the world for international deals and trading, with a tradition spanning over 500 years. The Leipzig Book Fair also retains a major position in Europe.
== Scope == Medical genetics encompasses many different areas, including clinical practice of physicians, genetic counselors, and nutritionists, clinical diagnostic laboratory activities, and research into the causes and inheritance of genetic disorders. Examples of conditions that fall within the scope of medical genetics include birth defects and dysmorphology, intellectual disabilities, autism, mitochondrial disorders, skeletal dysplasia, connective tissue disorders, cancer genetics, and prenatal diagnosis. Medical genetics is increasingly becoming relevant to many common diseases. Overlaps with other medical specialties are beginning to emerge, as recent advances in genetics are revealing etiologies for morphologic, endocrine, cardiovascular, pulmonary, ophthalmologist, renal, psychiatric, and dermatologic conditions. The medical genetics community is increasingly involved with individuals who have undertaken elective genetic and genomic testing.
Sources: en.wikipedia.org
Cardarine is an investigational synthetic compound that acts as a PPARδ agonist. It is also known as GW501516 and has been studied mainly in preclinical research. It is not an approved medicine.
No. Cardarine is not a steroid hormone; it targets the nuclear receptor PPARδ. Its classification in anti-doping rules differs from anabolic steroids, though it remains prohibited in sport.
Early rodent studies reported tumor formation at multiple sites, which raised safety concerns. Sponsors stopped clinical development, and no approved human product exists.
Legal status varies by country. It is not approved as a medicine, and it is prohibited in sport. Some jurisdictions restrict import, sale, or possession.