Endogenous Metabolite

6PPD-Q (6PPD-Quinone) is an environmental pollutant that can target CNR2, CNR1, AA2AR, LCAT and TRPA1. Among them, CNR2 has the highest binding affinity and may act as a CNR2 receptor agonist to activate cannabinoid receptors. 6PPD-Q can damage the sperm quality and induce the impairment of male reproductive ability in mice. 6PPD-Q can induce intestinal inflammation and barrier damage by disrupting mitochondrial function, reducing neuronal glycolytic metabolites and TCA cycle intermediates, and exacerbating α-synuclein (α-syn) aggregation.

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.

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.

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

Prostaglandin E2 (PGE2) is a natural hormone-like substance involved in various physiological functions, including the contraction and relaxation of smooth muscles, dilation and constriction of blood vessels, regulation of blood pressure, and modulation of inflammation. It can be used to induce neuropathic pain models.

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.

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.

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.

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.

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.

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.

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.

Arachidonic acid (Immunocytophyt) is a polyunsaturated omega-6 essential fatty acid that serves as a major component of biological membranes and animal phospholipids. It is synthesized from dietary linoleic acid and acts as a precursor to lipid mediators such as prostaglandins, thromboxanes, and leukotrienes. Arachidonic acid can improve cognitive responses and cardiovascular function and is commonly used to induce paw edema models.

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.

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.

Retinoic acid (Tretinoin), a metabolite of vitamin A, is a natural agonist of the retinoic acid receptor RAR and inhibits RARα/β/γ (IC50=14 nM). Retinoic acid induces cellular differentiation, reduces cellular proliferation, and inhibits tumorigenesis.

1. Ganoderic acid A exhibits antitumor activity, mediated through its inhibitory effect on nuclear transcription factor-kappaB and activator protein-1. 2. Ganoderic acid A can induce proliferation inhibition, apoptosis and suppression of invasion in human

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.

Luteolin (Luteolol) belongs to the flavonoid group of natural products and is a Nrf2 inhibitor, PDE inhibitor. Luteolin has a wide range of biological activities including antitumor, antioxidant, anti-inflammatory, antimicrobial, antiviral, antiallergic, and procoagulant.

Serotonin (5-hydroxytryptamine) is a monoamine neurotransmitter in the CNS and an endogenous 5-HT receptor agonist. Serotonin regulates the nervous system, digestive system and cardiovascular system.

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.

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.

Heparan sulfate is a natural product, a linear polysaccharide. Heparan sulfate occurs as a proteoglycan (HSPG) that is tightly attached to cell surface or extracellular matrix proteins.