Immune System Disorder

β-Carotene (Provitamin A), a carotenoid compound, is a naturally-occurring vitamin A precursor. β-Carotene is a modulator of reactive oxygen species (ROS), with antioxidant and antiinflammatory activities. β-Carotene may serve as an antioxidant or as a prooxidant, depending on its intrinsic properties as well as on the redox potential of the biological environment in which it acts. β-Carotene induces breast cancer cells apoptosis, with anticancer activities.

(R)-3-Hydroxybutanoic acid is a metabolite, and converted from acetoacetic acid catalyzed by 3-hydroxybutyrate dehydrogenase. (R)-3-Hydroxybutanoic acid has applications as a nutrition source and as a precursor for vitamins, antibiotics and pheromones.

Anserine, a methylated form of Carnosine, is an orally active, natural Histidine-containing dipeptide found in skeletal muscle of vertebrates. Anserine is not cleaved by serum carnosinase and act as biochemical buffers, chelators, antioxidants, and anti-glycation agents. Anserine has blood-brain barrier permeability, and improves memory functions in Alzheimer's disease (AD)-model mice.

Ubiquinone-1 is an intermediate in the synthesis of Coenzyme Q. Ubiquinone-1 can be reduced by NADPH oxidase, hepatoma cells, Ascorbic acid (HY-B0166).

4-Methyl-2-oxopentanoic acid (α-Ketoisocaproic acid) is a metabolite of L-leucine and is involved in energy metabolism. 4-Methyl-2-oxopentanoic acid increases endoplasmic reticulum stress, promotes lipid accumulation in preadipocytes and insulin resistance by impairing mTOR and autophagy signaling pathways. 4-Methyl-2-oxopentanoic acid also causes oxidative damage, leading to cognitive deficits, inhibits α-ketoglutarate dehydrogenase activity, acts as an oxidative phosphorylation uncoupler and metabolic inhibitor. 4-Methyl-2-oxopentanoic acid acts as a nutrient signal and stimulates skeletal muscle protein synthesis. 4-Methyl-2-oxopentanoic acid can be used in the study of maple syrup urine disease.

Zeaxanthin, a diet-obtained carotenoid, presents in the macula region of the eye. Zeaxanthin shows antioxidant effects.

Homovanillic acid (Vanilacetic acid) is a dopamine metabolite found to be associated with aromatic L-amino acid decarboxylase deficiency, celiac disease, growth hormone deficiency, and sepiapterin reductase deficiency.

Azelaic acid is a nine-carbon dicarboxylic acid. Azelaic acid has antimicrobial activity against Propionibacterium acnes and Staphylococcus epidermidis through inhibition of microbial cellular prorein synthesis. Azelaic acid has hypopigmentation action resulting from its ability to scavenge free radicals.

2′-Deoxyadenosine is an adenine nucleoside that inhibits glucose-stimulated insulin release. 2′-Deoxyadenosine inhibits glucose-stimulated increases seen in islet cyclic AMP (cAMP) accumulation. 2'-Deoxyadenosine activates caspase-3 and promotes apoptosis. 2'-Deoxyadenosine inhibits the activity of S-adenosyl-L-homocysteine hydrolase (SAHH). 2'-Deoxyadenosine inhibits the growth of various cells. 2'-Deoxyadenosine has an anticancer effect on colon cancer.

L-Pyroglutamic acid is the levo-isomer of Pyroglutamic acid. L-Pyroglutamic acid is the biologically active enantiomer in humans. Pyroglutamic acid is an intermediate in glutathione metabolism. L-Pyroglutamic acid can be used as a biomarker for systemic lupus erythematosus (SLE).

L-Hydroxyproline, one of the hydroxyproline (Hyp) isomers, is a useful chiral building block in the production of many pharmaceuticals.

Estriol (Oestriol), an orally active estrogen, is a ERα and ERβ agonist. Estriol is a potent GPR30 antagonist in estrogen receptor-negative breast cancer cells. Estriol can ameliorate disease severity through immunomodulatory mechanisms that decrease tissue inflammation. Estriol has powerful proconvulsant effects.

3-Hydroxyisovaleric acid is a normal endogenous metabolite excreted in the urine. The urinary excretion of 3-hydroxyisovaleric acid is early and sensitive indicator of biotin deficiency.

1-Methyladenosine is an RNA modification that can serve as a tumor marker, with elevated levels in the body associated with cancer development. Following 1-methyladenosine methylation, upregulation of PPARδ expression regulates cholesterol metabolism and activates Hedgehog signaling pathway, driving liver tumorigenesis.

17a-Hydroxypregnenolone (17-OHP5) is a metabolite of Pregnenolone (HY-B0151) and a precursor in the biosynthesis of Dehydroepiandrosterone (HY-14650). 17a-Hydroxypregnenolone is a substrate for the enzyme 3β-hydroxysteroid dehydrogenase (3β-HSD).

Vanillic acid is a flavoring agent found in edible plants and fruits, also found in Angelica sinensis. Vanillic acid inhibits NF-κB activation. Anti-inflammatory, antibacterial, and chemopreventive effects.

Isovaleric acid is an oral active short-chain fatty acid that inhibits osteoclast differentiation by stimulating AMPK phosphorylation and promotes colonic smooth muscle relaxation by activating the cAMP/PKA pathway. Isovaleric acid can be used in research on skeletal diseases (such as osteoporosis) and intestinal disorders.

Sarcosine (N-Methylglycine), an endogenous amino acid, is a competitive glycine transporter type I (GlyT1) inhibitor and N-methyl-D-aspartate (NMDA) receptor co-agonist. Sarcosine increases the glycine concentration, resulting in an indirect potentiation of the NMDA receptor. Sarcosine is commonly used for the research of schizophrenia.

5-Aminolevulinic acid (5-ALA; δ-Aminolevulinic acid; 5-Amino-4-oxopentanoic acid) is an orally active heme precursor. 5-Aminolevulinic acid promotes aerobic energy metabolism and increases ATP levels by enhancing the activity of cytochrome c oxidase. 5-Aminolevulinic acid enhances LPS-induced proinflammatory cytokine production and gene activation, and restores the phagocytic activity and ROS generation capacity of neutrophils. 5-Aminolevulinic acid selectively accumulates protoporphyrin IX in tumor cells; as a photosensitizer and radiosensitizer, it induces ROS burst upon light or X-ray irradiation to inhibit tumor growth. 5-Aminolevulinic acid can be applied to the research of septic shock, melanoma, and cancer radiotherapy.

Quercetin (Standard) is the analytical standard of Quercetin. This product is intended for research and analytical applications. Quercetin, a natural flavonoid, is a stimulator of recombinant SIRT1 and also a PI3K inhibitor with IC50 of 2.4 μM, 3.0 μM and 5.4 μM for PI3K γ, PI3K δ and PI3K β, respectively.