Dataset Information

Proteome Mapping of Formaldehyde-derived Modifications and Cross-links by Real-time Isotopic Signature Targeted Profiling

ABSTRACT: We developed a chemoproteomics strategy which combines the real-time isotopic-signature-targeted profiling ("isoSTAR") platform with isotopically labeled FAs to perform a global and site‑specific profiling of FA‑derived modifications in cellular and tissue proteomes. Three distinct masses associated with FA modifications on lysines were detected through the real-time targeted profiling and the open-search strategy. By combining multiple chemical proteomic strategies, we mapped the lysine modifications by formaldehyde and elucidated their biological functions. We also established a novel real-time targeted profiling method for identifying formaldehyde cross-linked peptides, and leveraged its small size and high permeability to enable the application of CXMS in tissue samples. These findings significantly advance our understanding of formaldehyde’s molecular roles in biological systems.

ORGANISM(S): Homo Sapiens Mus Musculus

SUBMITTER: Chu Wang

PROVIDER: PXD080015 | iProX | Mon Jun 22 00:00:00 BST 2026

REPOSITORIES: iProX

ACCESS DATA

Similar Datasets

Project description:41 volunteers (male non-smokers) were exposed to formaldehyde (FA) vapors for 4 h per day over a period of 5 working days under strictly controlled conditions. For each exposure day, different exposure concentrations were used in a random order ranging from 0 up to 0.7 ppm. At concentrations of 0.3 ppm and 0.4 ppm, four peaks of 0.6 or 0.8 ppm for 15 min each were applied. During exposure, subjects had to perform bicycle exercises (about 80 W) four times for 15 min. Blood samples, exfoliated nasal mucosa cells and nasal biopsies were taken before the first and after the last exposure. Nasal epithelial cells were additionally sampled 1, 2 and 3 weeks after the end of the exposure period. The alkaline comet assay, the sister chromatid exchange (SCE) test and the cytokinesis-block micronucleus test (CBMNT) were performed with blood samples. The micronucleus test (MNT) was also performed with exfoliated nasal mucosa cells. The expression (mRNA level) of the GSH-dependent formaldehyde dehydrogenase (FDH, identical to alcohol dehydrogenase 5; ADH5; EC 1.2.1.46) was measured in blood samples by quantitative real-time RT-PCR with TaqMan probes. DNA microarray analyses using a full-genome human microarray were performed on blood samples and nasal biopsies of selected subgroups with the highest FA exposure at different days. None of the tests performed showed a biologically significant effect related to FA exposure. Under the experimental conditions of this study, inhalation of FA did not lead to genotoxic effects in peripheral blood cells and nasal mucosa and had no effect on the expression of the FDH gene. Inhalation of FA also did not cause biologically relevant alterations in the expression of genes in a microarray analysis with nasal biopsies and peripheral blood cells. Gene expression analysis of nasal biopsies and blood samples before and after inhalation of 0.7ppm formaldehyde (0 h, 24 h, or 72 h before sampling), and of blood cells before and after exposure to 200µM formaldehyde for 4 hours.

Dataset Information

Proteome Mapping of Formaldehyde-derived Modifications and Cross-links by Real-time Isotopic Signature Targeted Profiling

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets