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Characterization of Phase I and Glucuronide Phase II Metabolites of 17 Mycotoxins Using Liquid Chromatography-High-Resolution Mass Spectrometry

Author(s): Slobodchikova I; Sivakumar R; Rahman MS; Vuckovic D;

Routine mycotoxin biomonitoring methods do not include many mycotoxin phase I and phase II metabolites, which may significantly underestimate mycotoxin exposure especially for heavily metabolized mycotoxins. Additional research efforts are also needed to me...

Article GUID: 31344861
Evaluation of D10-Leu metabolic labeling coupled with MALDI-MS analysis in studying the response of the yeast proteome to H2O2 challenge

Author(s): Jiang H; English AM;

An efficient D10-Leu metabolic-labeling method combined with isotope-ratio quantitation by MALDI-TOF MS was used to probe the response of the yeast proteome to H2O2. Control cultures correct for effects not associated with H2O2 challenge. A stress-response ...

Article GUID: 17022625
Reduction and S-nitrosation of the neuropeptide oxytocin: implications for its biological function

Author(s): Roy JF; Chrétien MN; Woodside B; English AM;

Oxytocin (OT; Cys-Tyr-Ile-Gln-Asn-Cys-Pro-leu-Gly), a posterior pituitary peptide hormone, is characterized by a Cys1-Cys6 disulfide bond in its stable, isolated state. This paper describes a simple, one-step method for the production of OT in its reduced, ...

Article GUID: 17692543
Human blood cell levels of 5-hydroxymethylcytosine (5hmC) decline with age, partly related to acquired mutations in TET2

Author(s): Buscarlet M; Tessier A; Provost S; Mollica L; Busque L;

Epigenetic alteration may play a role in age-associated dysfunction of stem cells and predispose to the development of hematological cancers. We analyzed global levels of hematopoietic 5-hydroxymethylcytosine (5hmC) and 5-methylcytosine (5mC) in a cross-sec...

Article GUID: 27475703
Title:Evaluation of D10-Leu metabolic labeling coupled with MALDI-MS analysis in studying the response of the yeast proteome to H2O2 challenge
Authors:Jiang H,  English AM, 
Link:https://pubmed.ncbi.nlm.nih.gov/17022625/
DOI:10.1021/pr060019m
Category:J Proteome Res
PMID:17022625
Dept Affiliation: CBAMS
1 Centre for Biological Applications of Mass Spectrometry, Department of Chemistry and Biochemistry, Concordia University, Montreal, Quebec, Canada H4B 1R6.

Description:

An efficient D10-Leu metabolic-labeling method combined with isotope-ratio quantitation by MALDI-TOF MS was used to probe the response of the yeast proteome to H2O2. Control cultures correct for effects not associated with H2O2 challenge. A stress-response index to H2O2 (SRIH2O2) is defined, and values are reported for seven proteins at 45-225 min following exposure to 0.4 mM H2O2. The time course of protein accumulation in unstressed cells following the H10- to D10-SCD switch suggests that proteome responses at <45 min could be monitored by addition of excess D10-Leu to H10-cultures.