biomarker

1-Hydroxypyrene (1-Pyrenol), a biomarker of exposure to polycyclic aromatic hydrocarbons, is analyzed in urine samples.

4-Hydroxynonenal (4-HNE) (4-HNE) is an oxidative/nitrosative stress biomarker. It is a substrate and an inhibitor of acetaldehyde dehydrogenase 2 (ALDH2).

Cinnamoylglycine, a glycine conjugate of cinnamic acid and a urinary metabolite in humans, is used as a potential urinary biomarker.

7α-Hydroxycholesterol, a cholesterol oxide formed through both enzymatic and non-enzymatic oxidation, can serve as a biomarker for lipid peroxidation.

1,3,7-Trimethyluric acid, a purine alkaloid, occurs as a minor metabolite of caffeine in humans. It functions as an antioxidant with the ability to scavenge hydroxyl radicals and offers protective benefits against lipid peroxidation in erythrocyte membranes.

PQ-10 (A-844337) is a PDE-10 inhibitor. PQ-10 induces brain glucose metabolism patterns, which may be a potential translational biomarker.

Formiminoglutamic acid (NSC 334078) is a biomarker for formylaminoglutaminuria, an indicator of folate deficiency.

Lathosterol, a molecule akin to cholesterol, serves as a biomarker for the body's total cholesterol synthesis, as indicated by its serum concentration.

5-OxoETE (5-KETE) is a polyunsaturated fatty acid derivative, a chemokine for eosinophils and a potential biomarker for irritable bowel syndrome.

3,5-Dihydroxybenzoic acid is a metabolite of alkylresorcinols in human urine and plasma, a potential biomarker of food intake such as beer, nuts, peanuts, and legumes, and a selective hydroxycarboxylic acid 1 (HCA1) inhibitor.

2-Oxovaleric acid is a keto acid found in human blood.

Indole-3-methanamine has been detected, but not quantified in, barley, cereals, and cereal products.

Methionine sulfoxide, an oxidation product of methionine formed through interaction with reactive oxygen species, serves as a biomarker for oxidative stress in vivo.

Isobutyl decanoate (Decanoic acid isobutyl ester) can be used as a biomarker for esophageal squamous cell carcinoma and lung cancer, and can be isolated from wine.

1,2,3-Trimethoxybenzene is an aromatic compound widely used in biochemical experiments and drug synthesis research.

N-Methylsarcosine (Dimethylglycine) is used as an athletic performance enhancer and immunostimulant. It is also used in the treatment of autism, epilepsy and mitochondrial disease. It is also employed as a biomarker of protein degradation in chronic obstructive lung disease (COPD) patients. Further, it is used as a substrate to identify, differentiate and characterize amino acid methyltransferase. It plays an important role in the development of glycine-based ionic liquids and emulsifiers.

2-Hydroxybutyric acid (α-Hydroxybutyric acid) is a product of protein metabolism and serves as a biomarker for type 2 diabetes and pre-eclampsia.

D-(+)-Xylose (Wood sugar) is an aldopentose - a monosaccharide containing five carbon atoms and an aldehyde functional group. It has chemical formula C5H10O5 and is 40% as sweet as sucrose. Xylose is also found in mucopolysaccharides of connective tissue and sometimes in the urine. Xylose is the first sugar added to serine or threonine residues during proteoglycan type O-glycosylation. Therefore xylose is involved in the biosythetic pathways of most anionic polysaccharides such as heparan sulphate and chondroitin sulphate. In medicine, xylose is used to test for malabsorption by administering a xylose solution to the patient after fasting. If xylose is detected in the blood and/or urine within the next few hours, it has been absorbed by the intestines. Xylose is said to be one of eight sugars which are essential for human nutrition, the others being galactose, glucose, mannose, N-acetylglucosamine, N-acetylgalactosamine, fucose, and sialic acid. . Xylose in the urine is a biomarker for the consumption of apples and other fruits.

Trans-Aconitic acid is normally present in normal human urine, and it has been suggested that is present in larger amounts with Reye's syndrome and organic aciduria. trans-Aconitic acid is a substrate of enzyme trans-aconitate 2-methyltransferase (EC 2.1.

L-Arabinitol (L-(-)-Arabitol) is a potential biomarker for the comsuption of the food products such as sweet potato, deerberry, moth bean. L-Arabinitol is associated with Alzheimer's disease and ribose-5-phosphate isomerase deficiency.

5'-Guanylic acid disodium salt (GMP-5) is a purine ribonucleoside monophosphate. L-Glutamic acid and guanosine monophosphate are biosynthesized from xanthylic acid and L-glutamine via GMP synthase [glutamine-hydrolyzing]. Guanosine triphosphate and guanosine monophosphate are biosynthesized from diguanosine tetraphosphate via bis(5'-nucleosyl)-tetraphosphatase [asymmetrical]. In humans, guanosine monophosphate is involved in the kanamycin, telithromycin, tobramycin, and erythromycin action pathways, and several metabolic disorders including AICA-ribosiduria, adenosine deaminase deficiency, adenine phosphoribosyltransferase deficiency (aprt), and 2-hydroxyglutric aciduria (D and L form) pathways. Guanosine monophosphate is also found in foods like onion-family vegetables, millet, Chinese water chestnut, and red rice, serving as a potential biomarker for the consumption of these foods.

D-(-)-Tartaric acid (D-Tartaric acid; (S, S)-tartarate; D-threaric acid) is mainly located in the cytoplasm. D-(-)-Tartaric acid can be converted into (2S,3S)-cis-fertaric acid and (2S,3S)-trans-fertaric acid. Outside the human body, it can be found in vinegar. This makes it a potential biomarker for the consumption of this food.

2-Hydroxyphenylacetic acid (Ortho-Hydroxyphenylacetic acid) can be found in a number of food items such as natal plum, lemon verbena, half-highbush blueberry, and parsley, which makes 2-Hydroxyphenylacetic acid a potential biomarker for the consumption of these food products. 2-Hydroxyphenylacetic acid (Ortho-Hydroxyphenylacetic acid) can be found primarily in blood, feces, and urine.

1,3,5-Trimethoxybenzene (Phloroglucinol trimethyl ether) is a methoxybenzene carrying methoxy groups at positions 1, 3 and 5. It has been found to be a biomarker of flavonoid consumption in humans. It has a role as a biomarker and a human xenobiotic metabolite.