Nuclear receptor raises a handful of sensible questions. This page answers them in order, starting with the fundamentals and moving to applications.
This page was last updated on 2026-05-13 and is reviewed periodically as new material appears.
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.
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.
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.
| 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. |
== History == “Synthesize a multi-component mixture of compounds in a single process and screen it also a single process”. This is the principle of combinatorial chemistry invented by Prof. Furka Á. (Eötvös Loránd University Budapest Hungary) in 1982, and described it including the method of synthesis of combinatorial libraries and that of a deconvolution strategy in a document notarized in the same year. Motivations that led to the invention had been published in 2002. DNA encoded chemical libraries (DECLs) are synthesized by the combinatorial chemistry principle and it clearly agrees with their application.
In 2019, the European Medicines Agency's Pharmacovigilance Risk Assessment Committee (PRAC) recommended that product labels for all SSRIs and SNRIs, including sertraline, be updated to state that sexual dysfunction may be long-lasting even after treatment is stopped. Health Canada followed with similar label updates in 2021. In 2024, Australia's Therapeutic Goods Administration aligned all SSRI and SNRI product information to reflect this risk, noting that sertraline already carried a warning about persistent sexual dysfunction.
== Medical uses == Olipudase alfa is indicated as an enzyme replacement therapy for the treatment of non-central nervous system manifestations of acid sphingomyelinase deficiency in people with type A/B or type B. Olipudase alfa is an enzyme replacement therapy, developed to replace patients' deficient or defective enzyme, acid sphingomyelinase, and thereby reduce fat accumulation within cells and relieve some of the symptoms of the disease. Xenpozyme was approved by the European Medicines Agency for the treatment of acid sphingomyelinase deficiency type A/B or type B, and by the US FDA for the treatment of non–central nervous system manifestations of acid sphingomyelinase deficiency.
Sources: en.wikipedia.org
The type of the amyloid protein can be determined in various ways: the detection of abnormal proteins in the bloodstream (on protein electrophoresis or light chain determination); binding of particular antibodies to the amyloid found in the tissue (immunohistochemistry); or extraction of the protein and identification of its individual amino acids. Immunohistochemistry can identify AA amyloidosis the majority of the time, but can miss many cases of AL amyloidosis. Laser microdissection with mass spectrometry is the most reliable method of identifying the different forms of amyloidosis. AL was previously considered the most common form of amyloidosis, and a diagnosis often begins with a search for plasma cell dyscrasia, memory B cells producing aberrant immunoglobulins or portions of immunoglobulins. Immunofixation electrophoresis of urine or serum is positive in 90% of people with AL amyloidosis. Immunofixation electrophoresis is more sensitive than regular electrophoresis but may not be available in all centers. Alternatively immunohistochemical staining of a bone marrow biopsy looking for dominant plasma cells can be sought in people with a high clinical suspicion for AL amyloidosis but negative electrophoresis. ATTR is now considered to be the most common form of amyloidosis. It may be either age related in wild-type ATTR (ATTRv) or familial transthyretin-associated amyloidosis, is suspected in people with family history of idiopathic neuropathies or heart failure who lack evidence of plasma cell dyscrasias.
Methyl blue is a chemical compound with the molecular formula C37H27N3Na2O9S3. It is used as a stain in histology, and stains collagen blue in tissue sections. It can be used in some differential staining techniques such as Mallory's trichrome stain and Gömöri trichrome stain, and can be used to mediate electron transfer in microbial fuel cells. Fungal cell walls are also stained by methyl blue. Methyl blue is also available in mixture with water blue, under name Aniline Blue WS, Aniline blue, China blue, or Soluble blue; and in a solution of phenol, glycerol, and lactic acid under the name Lactophenol cotton blue (LPCB), which is used for microscopic visualization of fungi.
As for Thrombotic disease, there have been several attempts to identify the contribution of α2β1-related genes to the development of this disorder. For example, polymorphisms in the ITGA2 gene can influence the density of α2β1 receptors in the platelet membrane, thus affecting the interaction of platelets with collagen and, consequently, their ability to form thrombi. However, the relationship of the described polymorphisms to myocardial infarction or ischemic stroke was rather inconsistent. It has also been reported that ITGA2 can be used as a biomarker for the diagnosis and prognosis of diseases. Overexpression of the ITGA2 gene is correlated with worse outcomes of several types of cancers, which implies the possibility of predicting aggressiveness, metastasis and survival based on the expression of this protein. With further development of transcriptomics and proteomics studies, ITGA2 was recognized as one of the candidates for a biomarker of disease progression and evaluation of the effect of targeted therapies. Since this integrin is responsible for many pathologies, it has become an attractive target for therapy. Monoclonal antibodies, peptides, and other molecules were developed to inhibit the functions of integrin α2β1 related to binding of cells to extracellular matrix components and subsequent signal transduction. However, there are no specific therapeutic agents targeting integrin α2β1 currently available for clinical use.
Sources: en.wikipedia.org
The same day, Hitler met with Chamberlain and demanded the swift takeover of the Sudetenland by Nazi Germany under threat of war. Czechoslovakia, Hitler claimed, was slaughtering the Sudeten Germans. Chamberlain referred the demand to the British and French governments, both of which accepted. The Czechoslovak government resisted by arguing that Hitler's proposal would ruin the nation's economy and ultimately lead to German control of all of Czechoslovakia. The United Kingdom and France issued an ultimatum and made a French commitment to Czechoslovakia contingent upon its acceptance. On 21 September, Czechoslovakia capitulated. The next day, however, Hitler added new demands that insisted for the claims of Poland and Hungary to be satisfied as well. Romania was also invited to share in the division of Carpathian Ruthenia but refused because it was an ally of Czechoslovakia (see Little Entente). The Czechoslovak capitulation precipitated an outburst of national indignation. In demonstrations and rallies, Czechs and Slovaks called for a strong military government to defend the integrity of the state. A new cabinet, under General Jan Syrový, was installed, and on 23 September 1938, a decree of general mobilization was issued. The Czechoslovak Army was modern, had an excellent system of frontier fortifications and was prepared to fight. The Soviet Union announced its willingness to come to Czechoslovakia's assistance. Beneš, however, refused to go to war without the support of the Western powers.
Chronic poisoning is long-term repeated or continuous exposure to a poison where symptoms do not occur immediately or after each exposure. The person gradually becomes ill, or becomes ill after a long latent period. Chronic poisoning most commonly occurs following exposure to poisons that bioaccumulate, or are biomagnified, such as mercury, gadolinium, and lead.
Moscow has some strong public schools, but the system as a whole is dispiriting, in part because it is being corroded by the corruption that is a post-Soviet scourge. Parents often pay bribes to get their children admitted to better public schools. There are additional payoffs for good grades.
Gly + [Glu(-Cys)]n+1-Gly Thus, the two substrates of this enzyme are glutathione and [Glu(-Cys)]n-Gly, whereas its two products are Gly and [Glu(-Cys)]n+1-Gly. This enzyme belongs to the family of transferases, specifically the aminoacyltransferases. The systematic name of this enzyme class is glutathione:poly(4-glutamyl-cysteinyl)glycine 4-glutamylcysteinyltransferase. Other names in common use include phytochelatin synthase, and gamma-glutamylcysteine dipeptidyl transpeptidase.
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.