Endogenous Metabolite

Rapamycin (AY 22989) is a natural product of macrolides, an mTOR inhibitor with specificity (HEK293 cells: IC50=0.1 nM). Rapamycin has immunosuppressive activity and induces autophagy.

6PPD-Q (6PPD-Quinone), a contaminant present in the environment and soil, is a derivative of the tire antioxidant N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine (6PPD), which impairs the quality of spermatozoa in mice and induces impaired male fertility.

Corticosterone (Kendall's compound B) is an adrenocortical steroid with salocorticoid and glucocorticoid activity that is orally active. Corticosterone is involved in the regulation of energy, immune responses, and stress responses in the body.

3-Methyladenine (3-MA) is a PI3K inhibitor that selectively inhibits class IB PI3Kγ (IC50 = 60 μM) and class III VPS34 (IC50 = 25 μM). 3-Methyladenine inhibits autophagy.

AFMK (Formyl-N-acetyl-5-methoxykynurenamine) is an active metabolite of Melatonin with antioxidant and free radical scavenging activity. AFMK is a modulator of apoptosis and improves the anti-tumor effect of Gemcitabine in PANC-1 cells.

N1-Acetylspermine trihydrochloride is a monoacetylated derivative of spermine which is an endogenous polyamine. N1-Acetylspermine trihydrochloride can be used in studies about the uptake of the anticancer polyamine analog bleomycin-A5 by the human carnitine transporter SLC22A16.

L-Lactic acid ((S)-2-Hydroxypropanoic acid) is a natural product produced by the anaerobic glycolysis of pyruvic acid. L-Lactic acid is a sensitive indicator of tissue hypoxia and can be used as a hemodynamic indicator in critically ill patients.

Docosahexaenoic Acid (DHA) is an essential omega-3 fatty acid prevalent in the brain and retina.

Sphingosine-1-phosphate (S1P) is an agonist for S1P1-5 receptors and a ligand for GPR3, GPR6, and GPR12. As an intracellular second messenger, it mobilizes Ca2+ and acts as an extracellular ligand for G-protein coupled receptors. This important lipid mediator is generated from sphingosine or other membrane phospholipids.

Prostaglandin E2 (PGE2) is a naturally occurring hormone involved in various physiological processes, such as smooth muscle contraction and relaxation, vasodilation and constriction, blood pressure regulation, and inflammatory regulation.

Zinc Protoporphyrin (Zn(II)-protoporphyrin IX) is an orally active, competitive inhibitor of heme oxygenase-1 (HO-1) that markedly attenuates the protective effects of Phloroglucinol (PG) against H2O2 and exhibits anti-cancer activity.

Arachidonic acid (Immunocytophyte) is an unsaturated, essential fatty acid. It is found in animal and human fat as well as in the liver, brain, and glandular organs, and is a constituent of animal phosphatides. It is formed by the synthesis from dietary linoleic acid and is a precursor in the biosynthesis of prostaglandins, thromboxanes, and leukotrienes.

Acetylcysteine (NAC) is an N-acetyl derivative of cysteine, a ROS inhibitor and mucolytic agent. Acetylcysteine induces apoptosis, can be used to reduce mucus thickness, and has anti-influenza viral activity.

SAH (SAH (S-Adenosylhomocysteine)) is an inhibitor for the METTL3-METTL14 heterodimer complex (METTL3-14, IC50: 0.9 μM).

ATP (Adenosine triphosphate) provides cellular energy, participates in overall energy balance, and maintains intracellular homeostasis. ATP can act as an extracellular signaling molecule through interactions with specific purinergic receptors to mediate a variety of processes including neurotransmission, inflammation, apoptosis, and bone remodeling.

Calcitriol (1,25-Dihydroxyvitamin D3) is a metabolite of vitamin D and a vitamin D receptor (VDR) agonist (IC50=0.4 nM). Calcitriol increases intestinal absorption of calcium and phosphorus, and increases bone resorption with parathyroid hormone.

Cyclic-di-GMP disodium (5GP-5GP disodium) is a STING agonist and a second messenger in bacteria. It is involved in a variety of processes in prokaryotes, including biofilm formation, motility, and cell cycle progression. Cyclic-di-GMP disodium (5GP-5GP disodium) exhibits antiproliferative activity against cancer cells, inducing increased CD4 receptor expression and cell cycle arrest, and is a novel therapeutic agent that can be developed to prevent or treat cancer.

Dihydroxyfumaric acid is a known generator of superoxide anions and by hydroxyl free radicals. Dihydroxyfumarate exposure can cause insulin inhibitory effects. It can spontaneously convert to hydroxypyruvate or to oxaloglycolate.

NADPH tetrasodium salt is the reduced form of the electron acceptor nicotinamide adenine dinucleotide phosphate, which acts as an electron donor in a variety of biological reactions. NADPH tetrasodium salt is also an endogenous inhibitor of ferroptosis.

β-nicotinamide mononucleotide (NMN) is a natural nucleotide and a key intermediate in the synthesis of coenzyme I (NAD+). β-nicotinamide mononucleotide is involved in a number of biochemical reactions in the human body, which are related to immunity and metabolism.

12-Ketodeoxycholic acid, a bile acid and kidney metabolite, serves as a detectable marker for kidney injury [1].

5-Fluorouracil (5-FU) is a uracil analog and inhibitor of DNA synthesis, exhibiting antitumor activity by affecting pyrimidine synthesis through thymidylate synthase inhibition; it induces apoptosis and autophagy.

L-Cystathionine (Cystathionine, L-) is a key nonprotein amino acid related to metabolic conditions of sulfur-containing amino acids. L-Cystathionine can be used in studies about cardiovascular protection.

Tamarixetin (4'-O-Methyl Quercetin) is a natural flavonoid derivative of quercetin that exhibits anti-inflammatory and antioxidative effects, offering protection against cardiac hypertrophy.