The short version of PPARδ fits in a sentence. The long version — which is the one that helps — is below.
Reviewed 2025-10-18. Anything still debated is marked as such rather than presented as settled.
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.
Anti-doping laboratories identify GW501516 and its metabolites using liquid chromatography-tandem mass spectrometry. Urine is the usual matrix, and detection can occur after the parent compound has cleared from blood. The exact detection window depends on dose, formulation, individual metabolism, and assay sensitivity. Because the compound is prohibited at all times, athletes are subject to testing in and out of competition. Analytical methods continue to improve as new metabolites and designer analogs are characterized.
GW501516 acts as a ligand for PPAR delta, a nuclear receptor that regulates transcription of genes involved in fatty acid oxidation and energy use. Activation of this receptor in skeletal muscle shifts metabolism toward fat burning in animal models. The compound does not burn fat directly; it changes gene expression over hours to days. Researchers study it to understand metabolic flexibility and exercise adaptation. Effects observed in rodents are not automatically expected in humans.
| Property | Value | Notes |
|---|---|---|
| Common name | Cardarine | Common internet and media name. |
| Research code | GW501516 | Also written GW-1516. |
| Drug class | PPARδ agonist | Not a selective androgen receptor modulator. |
| Development status | Discontinued | Clinical development halted after rodent cancer findings. |
| Regulatory status | Prohibited in sport | Listed by WADA; not approved as medicine. |
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.
GW501516 binds and activates PPARδ, a nuclear receptor that influences transcription of genes involved in fatty acid oxidation and energy use. Activation shifts some metabolic pathways in preclinical models, which is why the compound has been studied for lipid disorders and exercise-related endpoints. The exact downstream effects in humans are incompletely mapped. PPARδ is expressed in many tissues, including skeletal muscle, liver, and adipose tissue, so broad activation may have varied consequences. Researchers continue to examine how selective or partial activation might alter the balance between benefits and risks.
Published human data are sparse and mostly come from early-phase trials. Those studies examined short-term changes in lipids, glucose, and exercise capacity, but they were not large enough to establish efficacy or long-term safety. Some animal experiments reported increased running endurance, yet such findings do not prove a performance benefit in people. Anti-doping laboratories detect GW501516 and its metabolites in urine or blood using liquid chromatography-tandem mass spectrometry. Detection windows depend on dose, sample type, and individual metabolism. The method is sensitive enough to identify trace residues in tested samples.
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.
The pharmacological interest in cardarine centers on PPARδ activation and its downstream effects on lipid handling and mitochondrial function. In animal studies, PPARδ agonists have been associated with changes in exercise endurance and fatty acid utilization, though results vary by model and protocol. Human data remain sparse, and the absence of large controlled trials limits conclusions about efficacy. Researchers often describe the compound as a tool for probing PPARδ biology rather than a proven therapeutic agent.
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.
Sporting authorities added GW501516 to prohibited lists after it appeared in athlete samples and online markets. The World Anti-Doping Agency classifies it as a hormone and metabolic modulator, and its use can lead to an anti-doping rule violation. Some early laboratory work suggested effects on fatty acid oxidation and endurance-related metabolism in animals, but those findings do not establish safe or effective use in people. Reports of adverse events in humans are scarce and often anecdotal, which complicates risk assessment.
Legal status varies by country. In some places, cardarine is controlled under medicines or psychoactive substances laws; in others, it may be sold with minimal oversight as a research chemical. Customs agencies have intercepted shipments, and several national health agencies have issued warnings about products marketed for bodybuilding or performance enhancement. The lack of a standardized pharmaceutical supply means identity, purity, and contamination levels can differ widely between samples. These factors make cardarine a regulatory and public health concern rather than a conventional prescription drug.
Another important property of elements is their electronegativity. Atoms can form covalent bonds to each other by sharing electrons in pairs, creating an overlap of valence orbitals. The degree to which each atom attracts the shared electron pair depends on the atom's electronegativity – the tendency of an atom towards gaining or losing electrons. The more electronegative atom will tend to attract the electron pair more, and the less electronegative (or more electropositive) one will attract it less. In extreme cases, the electron can be thought of as having been passed completely from the more electropositive atom to the more electronegative one, though this is a simplification. The bond then binds two ions, one positive (having given up the electron) and one negative (having accepted it), and is termed an ionic bond. Electronegativity depends on how strongly the nucleus can attract an electron pair, and so it exhibits a similar variation to the other properties already discussed: electronegativity tends to fall going up to down, and rise going left to right. The alkali and alkaline earth metals are among the most electropositive elements, while the chalcogens, halogens, and noble gases are among the most electronegative ones. Electronegativity is generally measured on the Pauling scale, on which the most electronegative reactive atom (fluorine) is given electronegativity 4.0, and the least electronegative atom (caesium) is given electronegativity 0.79.
Mummies, though typically thought of as an Egyptian phenomenon, exist in many cultures and have been found on nearly every continent. The word mummy can refer to both intentionally and naturally preserved bodies and is not limited to one geographic area or culture. Damage of mummified remains can be caused by several factors, including poor environmental conditions, physical damage, and improper methods of preservation. Controlling environmental conditions is highly important in preserving the integrity of mummies. Fungi, pests, and microorganisms that cause decay are some of the possible results of inadequate storage and environmental factors. There are a number of ways to mitigate the effects of improper conditions, however. Methods of stabilizing mummies and halting deterioration include inert gas control, where the mummy is placed in a chamber or bag into which fumigants are introduced; wet sterilization, where solutions are applied to the mummy to repel insects and the growth of fungi; controlled drying, which reduces the relative humidity in order to stop growth of microorganisms; and ultraviolet irradiation, which kills microorganisms. Some previous treatments which were thought to help preserve mummified remains but ultimately led to further damage include curing remains by smoking them and applying solutions of copper salts to exposed skin. The Artefact Lab at the University of Pennsylvania Museum of Archaeology and Anthropology (Penn Museum) provides examples and images of mummy preservation.
== Signs and symptoms == Patients with insulinomas usually develop neuroglycopenic symptoms. These include recurrent headache, lethargy, diplopia, altered mental status, and blurred vision, particularly with exercise or fasting. Severe hypoglycemia may result in seizures, coma, and permanent neurological damage. Neuroglycopenic symptoms are more prominent in insulinoma, however patients may also have symptoms resulting from the catecholaminergic response to hypoglycemia (i.e. tremulousness, palpitations, tachycardia, sweating, hunger, anxiety, nausea). Weight gain is sometimes seen, as patients may eat more frequently to manage symptoms.
== See also == Breast-feeding Breastfeeding and fertility Epileptic seizure Hyperprolactinaemia Hypothalamic–pituitary–prolactin axis Male lactation Prolactin modulator Prolactin receptor Prolactin-releasing hormone Prolactinoma Weaning
== Process == The first step of the PEGylation is the suitable functionalization of the PEG polymer at one or both ends. PEGs that are activated at each end with the same reactive moiety are known as "homobifunctional", whereas if the functional groups present are different, then the PEG derivative is referred as "heterobifunctional" or "heterofunctional". The chemically active or activated derivatives of the PEG polymer are prepared to attach the PEG to the desired molecule. The overall PEGylation processes used to date for protein conjugation can be broadly classified into two types, namely a solution phase batch process and an on-column fed-batch process. The simple and commonly adopted batch process involves the mixing of reagents together in a suitable buffer solution, preferably at a temperature between 4 and 6 °C, followed by the separation and purification of the desired product using a suitable technique based on its physicochemical properties, including size exclusion chromatography (SEC), ion exchange chromatography (IEX), hydrophobic interaction chromatography (HIC) and membranes or aqueous two-phase systems (ATPS). The choice of the suitable functional group for the PEG derivative is based on the type of available reactive group on the molecule that will be coupled to the PEG. For proteins, typical reactive amino acids include lysine, cysteine, histidine, arginine, aspartic acid, glutamic acid, serine, threonine and tyrosine.
Sources: en.wikipedia.org
== External links == Molecular Dynamics Studio (2016) free open-source multi-scale modeling and simulation program for nano-composites with special support for structural DNA nanotechnology (originally Nanoengineer-1 by Nanorex) Nano-Hive: Nanospace Simulator (2006) free software for modeling nanotech entities Foresight Guidelines for Responsible Nanotechnology Development (2006) of molecular manufacturing technologies Center for Responsible Nanotechnology (2008) Molecular Assembler website (2008) Rage Against the (Green) Machine (2003) in Wired Government launches nano study UK EducationGuardian, 11 June 2003 Unraveling the Big Debate over Small Machines (2004) from BetterHumans.com Design considerations for an assembler (1995) by Ralph Merkle Kinematic Self-Replicating Machines — online technical book: first comprehensive survey of molecular assemblers (2004) by Robert Freitas and Ralph Merkle Design of a Primitive Nanofactory (2003) Video - Nanofactory in Action (2006) Nanofactory technology Review of Molecular Manufacturing Integrated Nanosystems for Atomically Precise Manufacturing — United States Department of Energy Workshop – August 5–6, 2015
=== 2011–2017: The Only Way Is Essex, I'm a Celebrity...Get Me Out of Here! and Celebrity Big Brother === In January 2011, Julie Childs, mother of Collins' friend Amy, suggested to producers of the ITV2 reality series The Only Way Is Essex that Collins would be an appropriate subject. They visited Collins' house and subsequently filmed her and her friends for two weeks. After returning to work as a car sales executive for a week, she was cast in the programme and began appearing in The Only Way Is Essex from its second series beginning in March 2011. Her first scene saw her attempting to sell a car to Kirk Norcross and taking him for a test drive. Collins ultimately quit her job to appear on the programme full time, and was paid £50 a day for her early appearances on the show, which she described as a "massive risk". Her mother Joan joined the programme during the fifth series in April 2012. From September 2011 until March 2013, Collins wrote a regular column in the tabloid magazine Closer. In April 2013, she released her debut autobiography Basically...: My Life as a Real Essex Girl, which became a bestseller in its first week of release. In January 2014, Collins took part in the second series of the ITV diving competition Splash!. During training, Collins suffered severe bruising and admitted she had to overcome a fear of water. She became the third celebrity to be eliminated after losing the splash-off to Michaela Strachan in the first heat. In November 2014, she took part in the fourteenth series of I'm a Celebrity...Get Me Out of Here! on ITV.
Gabapentin, sold under the brand name Neurontin among others, is an anticonvulsant medication used to treat neuropathic pain (postherpetic neuralgia) and partial seizures of epilepsy. Gabapentin is a central nervous system (CNS) depressant and derivative of the inhibitory neurotransmitter, GABA. It is used for the treatment of neuropathic pain caused by diabetic neuropathy, postherpetic neuralgia, and central pain. It is moderately effective: about 30–40% of those given gabapentin for diabetic neuropathy or postherpetic neuralgia have a meaningful benefit. Gabapentin binds to α2δ subunits to modulate calcium channel function and neurotransmitter release, weakly affects glutamate signaling pathways, and does not act on GABA receptors. Sleepiness and dizziness are the most common side effects. Serious side effects include extreme sedation, respiratory depression and allergic reactions. In December 2008, the US Food and Drug Administration issued a class-wide warning for gabapentinoids for an increased risk of suicide. Approximately two years after this pronouncement, a pharmacoepidemiologic study was conducted that showed there was no outstanding difference in suicide attempt rates between pre- and post-gabapentin prescription groups. Gabapentin was first approved for use in the United Kingdom in 1993. It has been available as a generic medication in the United States since 2004. It is the first of several other drugs that are similar in structure and mechanism, called gabapentinoids.
== Further reading == Kwatra SG, Yosipovitch G, Legat FJ, Reich A, Paul C, Simon D, et al. (October 2023). "Phase 3 Trial of Nemolizumab in Patients with Prurigo Nodularis". The New England Journal of Medicine. 389 (17): 1579–1589. doi:10.1056/NEJMoa2301333. hdl:1854/LU-01JMVNTYQXH55FHHB47BSMETXX. PMID 37888917. Silverberg JI, Wollenberg A, Reich A, Thaçi D, Legat FJ, Papp KA, et al. (August 2024). "Nemolizumab with concomitant topical therapy in adolescents and adults with moderate-to-severe atopic dermatitis (ARCADIA 1 and ARCADIA 2): results from two replicate, double-blind, randomised controlled phase 3 trials". Lancet. 404 (10451): 445–460. doi:10.1016/S0140-6736(24)01203-0. PMID 39067461.
Sources: en.wikipedia.org
The victory of the Chinese communists in December 1949 proved decisive in the course of the war as during the early 1950s guerrilla troops used the southern areas of China as a sanctuary where new troops could be trained and fitted beyond the reach of the French. The Việt Minh successfully carried out several hit-and-run ambushes against French Union military convoys along the Route Coloniale 4 (RC 4) roadway, which ran along the Chinese border, and was a major supply passage in Tonkin (northern Vietnam) for a series of frontier forts. One of the most famous attacks of this nature was the Battle of Cao Bằng of 1947–1949. China supplied and provided the Việt Minh guerrilla forces with almost every kind of crucial and important supplies and material required, such as food (including thousands of tonnes of rice), money, medics and medical aid and supplies, arms and weapons (ranging from artillery guns (24 of which were used at the Battle of Dien Bien Phu) to rifles and machine-guns), ammunition and explosives and other types of military equipment, including a large part of war-material captured from the then-recently defeated National Revolutionary Army (NRA) of Chiang Kai-shek's Nationalist Chinese government following the end of the Chinese Civil War in 1949. Evidence of the People's Republic of China's secret aid and supplies were found hidden in caves during the French military's Operation Hirondelle in July 1953.
The enzyme responsible for the elicitation of the respiratory burst is known as nicotinamide adenine dinucleotide phosphate (NADPH) oxidase, which is composed of five subunits. One component is a membrane cytochrome made up of two protein subunits, gp91phox and p22phox; the remaining three components are cytosolic-derived proteins: p40phox, p47phox, and p67phox. NADPH oxidase exists in the cytosol of the AM when in a quiescent state; but upon activation, two of its cytosolic components, p47phox and p67phox, have their tyrosine and serine residues phosphorylated, which are then able to mediate translocation of NADPHox to the cytochrome component, gp91phox/p22phox, on the plasma membrane via cytoskeletal elements. Compared to other phagocytes, the respiratory burst in AM is of a greater magnitude. Oxygen-independent microbicidal mechanisms are based on the production of acid, on the secretion of lysozymes, on iron-binding proteins, and on the synthesis of toxic cationic polypeptides. Macrophages possess a repertoire of antimicrobial molecules packaged within their granules and lysosomes. These organelles contain a myriad of degradative enzymes and antimicrobial peptides that are released into the phagolysosome, such as proteases, nucleases, phosphatases, esterases, lipases, and highly basic peptides. Moreover, macrophages possess a number of nutrient deprivation mechanisms that are used to starve phagocytosed pathogens of essential micronutrients. Certain microorganisms have evolved countermeasures which enable them to evade being destroyed by phagocytes.
== Usage == Deltamethrin is a highly effective insecticide. It is used, among other applications, for the production of long-lasting insecticidal nets (LLINs), which, along with indoor residual spraying (IRS), are the main vector control strategies recommended by the World Health Organization (WHO) for the management of malaria. Deltamethrin plays a key role in controlling malaria vectors, and is used in the manufacture of long-lasting insecticidal mosquito nets. It is used as one of a battery of pyrethroid insecticides in control of malarial vectors, particularly Anopheles gambiae, and whilst being the most employed pyrethroid insecticide, can be used in conjunction with, or as an alternative to, permethrin, cypermethrin and organophosphate-based insecticides, such as malathion and fenthion. Resistance to deltamethrin (and its counterparts) is now extremely widespread and threatens the success of worldwide vector control programmes.
Sources: en.wikipedia.org
No. Cardarine is a PPARδ agonist, while selective androgen receptor modulators act on androgen receptors. The two classes differ in receptor target and downstream effects.
Preclinical rodent studies reported cancers, including liver and bladder tumors, at tested doses. The human relevance of those findings is uncertain, but development was discontinued. No approved human product resulted.
No. It remains an investigational compound without approved therapeutic labeling. Sports regulators prohibit its use, and health agencies have warned against consuming it.
It binds to and activates PPAR delta, a nuclear receptor that controls expression of genes related to fatty acid oxidation. This mechanism can alter energy metabolism in animal models. It is not a direct stimulant or fat-burning enzyme.