If you have been reading about Nuclear receptor and want a single page that covers the useful parts, this is it: definitions, context, how it is studied, and the questions that come up repeatedly.
Last reviewed on 2025-08-15. Where a claim depends on a specific study, the study is described rather than over-claimed.
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.
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.
PPARδ is a nuclear receptor that regulates gene expression related to fatty acid oxidation, glucose homeostasis, and mitochondrial function. GW501516 binds to this receptor with high affinity and activates downstream signaling in skeletal muscle and other tissues. Animal studies reported increased endurance and altered fuel preference, but human data remain limited and inconsistent. The precise relationship between receptor activation and observed physiological changes is still an area of active investigation. Researchers have also examined whether the compound affects inflammation or cell proliferation. No approved therapeutic indication exists for cardarine.
In laboratory settings, cardarine is studied as a tool compound for probing PPARδ biology. Published experiments often use cell cultures, rodent models, or isolated tissues. Some investigations focus on metabolic effects, while others assess potential risks such as carcinogenicity observed in long-term animal studies. Because human trials are sparse, most knowledge comes from preclinical work and adverse event reports. Scientific literature frequently notes the gap between animal findings and human outcomes. The compound is not a dietary supplement and is not intended for human consumption.
Cardarine is a common name for GW501516, a synthetic compound developed in the 1990s through research collaborations involving GlaxoSmithKline. It belongs to a class of molecules known as peroxisome proliferator-activated receptor delta agonists. Early studies explored its effects on lipid metabolism and energy expenditure in animal models. The compound was never approved as a human medicine, and clinical development was discontinued. In the years since, it has appeared in fitness and bodybuilding communities as a performance-enhancing substance. Regulatory agencies classify it as an unapproved drug.
| Property | Value | Notes |
|---|---|---|
| Chemical class | PPARδ agonist | Not an anabolic steroid. |
| Common synonyms | GW501516, GW-1516 | Cardarine is an informal name. |
| Appearance | White to off-white powder | Typical for research-grade solid. |
| Solubility class | Poorly soluble in water; soluble in some organic solvents | Such as DMSO or ethanol in laboratory settings. |
| Typical storage temperature | Cool, dry, protected from light | Specific conditions vary by supplier and form. |
=== Legal status === Suvorexant is a schedule IV controlled substance under the Controlled Substances Act in the United States. It is not a controlled drug in Australia, instead being classed as a prescription-only medicine (Schedule 4 (S4)) in this country.
The superficial layer of transitional epithelium is connected to the basal layer via cellular projections, such as intermediate filaments protruding from the cellular membrane. These structural elements cause the epithelium to allow distension; however, these also cause the tissue to be relatively fragile and, therefore, difficult to study.
== Chemical synthesis == A variety of synthetic approaches have progressively improved the efficiency and stereoselectivity of protolichesterinic acid synthesis while developing new methodologies for constructing similar lactone-containing natural products. The first total synthesis of dl-protolichesterinic acid was reported in 1958 by Eugene van Tamelen and Shirley Bach. Their synthesis involved a four-step route: conversion of methyl 2-hexadecenoate to methyl 3-tridecylglycidate, ring-opening with dimethyl malonate anion, formation of the lactonic diacid salt, and α-methylenation using formaldehyde and diethylamine. The synthetic material matched natural protolichesterinic acid by infrared spectroscopy and chemical transformations. In 1993, Murta, de Azevedo and Greene achieved the first synthesis of (-)-protolichesterinic acid, establishing its absolute stereochemistry as (2S,3R). Their approach employed a facially selective 2+2 cycloaddition of dichloroketene with an enantiopure O-alkyl enol ether as the key step, completing the synthesis in 11 steps with 17% overall yield. Mandal, Maiti and Roy reported a stereoselective synthesis in 1998 using radical cyclization of epoxides. Their method employed bis(cyclopentadienyl)titanium(III) chloride to effect radical cyclization, forming key tetrahydrofuran intermediates. The four-step sequence involved epoxide cyclization, protection, lactone formation, and Jones oxidation, achieving an 80% yield in the final step.
After Santiesteban Prats informed Viñas Alonso about the conversation, the Grand Master and the Grand Commander disagreed on where the money should be kept, but it did stay in the Grand Master's office. According to a report by Urquía Carreño, on January 5, 2024, at the offices of the National Masonic Temple, Grand Treasurer Airán Cervera pulled Urquía Carreño aside, and asked him if they could discuss something in private. They went up to the roof, where Airán Cervera told Urquía Carreño that the safe was gone, probably stolen. Urquía Carreño, according to his report, kept this information to himself. At 10:15am on January 9, 2024, the Director of Llansó called Grand Commander Viñas Alonso to inform him that they were in the midst of a food shortage. The two men decided to withdraw 1,000 dollars from the vaults of the Grand Lodge to buy food for the residents. At around noon, Viñas Alonso called Urquía Carreño to inform him that Viñas Alonso would be joined by the Treasurer of the Board of Trustees, Ernesto Valdés García, the Secretary of the Board of Trustees, Frank E. Quevedo Martín, and the Director of the retirement home, Raúl Acosta to come to the vault and withdraw 1,000 dollars. After being informed of the situation, Grand Master Urquía Carreño said that the elevator in his office was broken, and that Urquía Carreño would bring the money to the offices of the Supreme Council. Grand Commander Viñas Alonso refused, citing the rules. Urquía Carreño said that he understood, and would call later to tell Viñas Alonso what time they could come by the office.
Sources: en.wikipedia.org
=== 1995–2006: DNA identity testing === In 1995, Bio-Synthesis, Inc. introduced DNA identity testing to its broad range of molecular diagnostic services. Today, the DNA Identity Testing Center of BSI uses advanced techniques and automated systems to produce the most accurate DNA testing results allowed by current scientific technologies. The DNA Identity Testing Center has its own staff of scientific professionals whose focus is to ensure the quality and integrity of all tests and services. In 2000, Bio-Synthesis, Inc. perform the genetic analysis close to 500 Chinese nationals that were soliciting, under the right of abode, the right to move to Hong Kong by proving that their biological fathers were Hong Kong residents.
=== Pregnancy === Antidepressant exposure (including vilazodone) is associated with shorter average duration of pregnancy (by three days), increased risk of preterm delivery (by 55%), lower birth weight (by 75 g), and lower Apgar scores (by <0.4 points). It is uncertain whether there is an increased rate of septal heart defects among children whose mothers were prescribed an SSRI in early pregnancy.
==== Type 1 diabetes ==== As of 2017, intradermal BCG vaccine is in the early stages of being studied in type 1 diabetes (T1D). A 2024 systematic review reports effects on HbA1c control. A brief update in 2025 reports encouraging progress in studies totaling 600 participants. Follow-up studies of participants of the original Phase I trial show lasting HbA1c reductions.
The Captagon was all destroyed by the new government; "Khattab", a pseudonym of one of the former rebels said "We destroyed and burned it because it's harmful to people. It harms nature and people and humans." The New York Times reported in December 2021 that the Syrian Army's elite 4th Armoured Division, commanded by Maher al-Assad, the brother of Syrian President Bashar al-Assad, oversaw much of the production and distribution of fenethylline, among other drugs. The unit controlled manufacturing facilities, packing plants, and smuggling networks all across Syria, and had started to deal in crystal meth. The division's security bureau, headed by Maj. Gen. Ghassan Bilal, provided protection for factories and along smuggling routes to the port city Latakia and to border crossings with Jordan and Lebanon. Jihad Yazigi, editor of The Syria Report, reported that fenethylline had "probably become Syria's most important source of foreign currency."
Pneumatic post or pneumatic mail is a system to deliver letters through pressurized air tubes. It was invented by the Scottish engineer William Murdoch in the 19th century and was later developed by the London Pneumatic Despatch Company. Pneumatic post systems were used in several large cities starting in the second half of the 19th century (including an 1866 London system powerful and large enough to transport humans during trial runs – though not intended for that purpose), but later were largely abandoned. A major network of tubes in Paris (the Paris pneumatic post) was in use until 1984, when it was abandoned in favor of computers and fax machines. The Prague pneumatic post commenced for the public in 1889 in Prague, now in the Czech Republic, and the network extended approximately 60 kilometres (37 mi). Pneumatic post stations usually connect post offices, stock exchanges, banks and ministries. Italy was the only country to issue postage stamps (between 1913 and 1966) specifically for pneumatic post. Austria, France, and Germany issued postal stationery for pneumatic use. Typical applications are in banks, hospitals, and supermarkets. Many large retailers used pneumatic tubes to transport cheques or other documents from cashiers to the accounting office.
Sources: en.wikipedia.org
Low-certainty evidence indicates that it mitigates worsening of peripheral neuropathy and disability from disease progression. Inotersen blocks gene expression of both wild-type and mutant TTR, reducing amyloid precursor. Moderate-certainty evidence suggests that it mitigates worsening of peripheral neuropathy. Long-term efficacy and safety of inotersen use in people with mutant TTR-related amyloidosis is still be evaluated in a phase-III clinical trial as of 2021. Both diflunisal and inotersen may also mitigate declines in quality-of-life, though the evidence for this effect is unclear. For people with cardiac ATTR the effect of inotersen use is inconclusive and requires further investigation. In 2018, inotersen was approved by the European Medicines Agency to treat polyneuropathy in adults with hereditary transthyretin amyloidosis. It has since been approved for use in Canada, the European Union and in the USA. Patisiran functions similarly to inotersen. Moderate-certainty evidence suggests that patisiran mitigates worsening of peripheral neuropathy and disability from disease progression. Additionally, low-certainty evidence suggests that patisiran mitigates decreases in quality-of-life and slightly reduces the rate of adverse events versus placebo. There is no evidence of an effect on mortality rate. A review of early data from use of patisiran in people with variant cardiac ATTR suggests that it may reduce mortality and hospitalization, however this is still being investigated and requires further investigation.
=== Interrogation === Sodium thiopental is an ultra-short-acting barbiturate that is marketed under the name Sodium Pentothal. It is often mistaken for "truth serum", or sodium amytal, an intermediate-acting barbiturate that is used for sedation and to treat insomnia, but was also used in so-called sodium amytal "interviews" where the person being questioned would incorrectly be thought to be more likely to provide the truth whilst under the influence of the drug. When dissolved in water, sodium amytal can be swallowed, or it can be administered by intravenous injection. The drug does not itself force people to tell the truth, but is thought to decrease inhibitions and slow creative thinking, making subjects more likely to be caught off guard when questioned, and increasing the possibility of the subject revealing information through emotional outbursts. Lying is somewhat more complex than telling the truth, especially under the influence of a sedative-hypnotic drug. The memory-impairing effects and cognitive impairments induced by sodium thiopental are thought to reduce a subject's ability to invent and remember lies. This practice is no longer considered legally admissible in court, owing to findings that subjects undergoing such interrogations may form false memories, putting the reliability of all information obtained through such methods into question.
Joseph Robinette Biden Jr. was born on November 20, 1942, at St. Mary's Hospital in Scranton, Pennsylvania, to Catherine Eugenia "Jean" Biden (née Finnegan) and Joseph Robinette Biden Sr. He is the oldest child in a Catholic family of predominantly Irish descent. Biden has a sister, Valerie, and two brothers, James and Francis. Joseph Sr. had been wealthy, and the family purchased a home in the affluent Long Island suburb of Garden City, New York, in 1946. After he suffered business setbacks around the time Biden was seven years old, the family lived with Jean's parents in Scranton for several years. Scranton fell into economic decline during the 1950s, and Joseph Sr. could not find steady work. Beginning in 1953, when Biden was ten, the family lived in an apartment in Claymont, Delaware, before moving to a house in nearby Mayfield, Delaware. Joseph Sr. later became a successful used-car salesman, maintaining the family in a middle-class lifestyle. Growing up, Biden observed alcoholism in his family, deciding at a young age to be teetotal. At Archmere Academy in Claymont, Biden played baseball and was a standout halfback and wide receiver on the high school football team. Though a poor student, he was class president in his junior and senior years. He graduated in 1961. At the University of Delaware in Newark, Biden briefly played freshman football and received a Bachelor of Arts degree with a double major in history and political science in 1965. To overcome a childhood stutter, he memorized lines from Ralph Waldo Emerson and William Butler Yeats.
=== Combined elementary and middle schools === Pre-kindergarten through grade 8 schools are essentially combined elementary and middle schools, facilitated in one building. Most of these schools are referred to as "academies" in the school district. The elementary school usually starts at pre-kindergarten and ends at grade 5 and the middle school starts at grade 6 and ends at grade 8. These schools usually offer a slightly enhanced standard of learning and studies have suggested that students have benefited from being in one continuous facility from kindergarten through 8th grade, without having the disruption having to attend a brand new school, for the middle school years. Cora L. Rice Elementary School and G. James Gholson Middle School are not true academies. Both schools are housed in one facility but they operate as two completely separate schools for all intents and purposes.
=== 1960s–1990s === In 1960, Rogers asked to buy into Toddle House, and was subsequently refused. Afterwards, he moved back to Atlanta and rejoined Waffle House, now a chain of three restaurants, to run restaurant operations. Shortly after Rogers returned full-time, Forkner followed suit and left Ben S. Forkner Realty. After opening a fourth restaurant in 1960, the company began franchising its restaurants and slowly grew to 27 stores by the late 1960s, before growth accelerated.
Sources: en.wikipedia.org
Cardarine is commonly known as GW501516 or GW-1516. These names refer to the same synthetic compound. It is not a brand-name approved medicine.
No, cardarine is not a steroid. It is classified as a PPARδ agonist. Its structure and receptor target differ from anabolic steroids.
No regulatory agency has approved cardarine as a medicine. It was investigated in early research but development was discontinued. It is not available as a prescription drug.
Cardarine is a common name for GW501516, a synthetic PPARδ agonist developed for research. It has not been approved as a medication in any country. It is classified as an unapproved drug and a prohibited substance in sport.