The associations of nitrated polycyclic aromatic hydrocarbon exposures with plasma glucose and amino acids.

Journal Article (Journal Article)

Nitrated polycyclic aromatic hydrocarbons (nitro-PAHs) have been widely studied for their mutagenic and carcinogenic effects. This study aims to investigate whether exposure to nitro-PAHs is associated with biomarkers of carbohydrate metabolism, an underlying risk factor for metabolic disorder. Early morning urine and blood samples were longitudinally collected two times with a four-week interval from 43 healthy adults. Five urinary amino-PAHs (1-aminonaphthalene, 2-aminonaphthalene, 9-aminophenanthrene, 2-aminofluorene, and 1-aminopyrene) were measured as biomarkers of nitro-PAH exposures. We measured plasma concentrations of glucose and six amino acids that can regulate insulin secretion, including aspartate (Asp), glutamate (Glu), glutamine (Gln), alanine (Ala), Arginine (Arg), and ornithine (Orn). We found that increasing concentrations of 9-aminophenanthrene were significantly associated with increasing glucose levels and with decreasing Asp, Glu, Ala, and Orn levels. We estimated that 26.4 %-43.8 % of the 9-aminophenanthrene-associated increase in glucose level was mediated by Asp, Glu, and Orn. These results suggest that exposure to certain nitro-PAHs affects glucose homeostasis, partly resulting from the depletion of insulin-stimulating amino acids (Asp, Glu, and Orn).

Full Text

Duke Authors

Cited Authors

  • He, L; Hu, X; Day, DB; Yan, M; Teng, Y; Liu, XL; Yan, E; Xiang, J; Qiu, X; Mo, J; Zhang, Y; Zhang, JJ; Gong, J

Published Date

  • November 2021

Published In

Volume / Issue

  • 289 /

Start / End Page

  • 117945 -

PubMed ID

  • 34426189

Electronic International Standard Serial Number (EISSN)

  • 1873-6424

International Standard Serial Number (ISSN)

  • 0269-7491

Digital Object Identifier (DOI)

  • 10.1016/j.envpol.2021.117945


  • eng