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Pathways to Identif...
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Vryonidis, Efstathios,1989-Stockholms universitet,Institutionen för miljövetenskap,Stockholm Univ, Dept Environm Sci, SE-10691 Stockholm, Sweden.
(author)
Pathways to Identify Electrophiles In Vivo Using Hemoglobin Adducts : Hydroxypropanoic Acid Valine Adduct and Its Possible Precursors
- Article/chapterEnglish2022
Publisher, publication year, extent ...
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2022-11-17
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American Chemical Society (ACS),2022
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Numbers
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LIBRIS-ID:oai:DiVA.org:su-223484
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https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-223484URI
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https://doi.org/10.1021/acs.chemrestox.2c00208DOI
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https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-498161URI
Supplementary language notes
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Language:English
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Summary in:English
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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Analytical methods and tools for the characterization of the human exposome by untargeted mass spectrometry approaches are advancing rapidly. Adductomics methods have been developed for untargeted screening of short-lived electrophiles, in the form of adducts to proteins or DNA, in vivo. The identification of an adduct and its precursor electrophile in the blood is more complex than that of stable chemicals. The present work aims to illustrate procedures for the identification of an adduct to N-terminal valine in hemoglobin detected with adductomics, and pathways for the tracing of its precursor and possible exposure sources. Identification of the adduct proceeded via preparation and characterization of standards of adduct analytes. Possible precursor(s) and exposure sources were investigated by measurements in blood of adduct formation by precursors in vitro and adduct levels in vivo. The adduct was identified as hydroxypropanoic acid valine (HPA-Val) by verification with a synthesized reference. The HPA-Val was measured together with other adducts (from acrylamide, glycidamide, glycidol, and acrylic acid) in human blood (n = 51, schoolchildren). The HPA-Val levels ranged between 6 and 76 pmol/g hemoglobin. The analysis of reference samples from humans and rodents showed that the HPA-Val adduct was observed in all studied samples. No correlation of the HPA-Val level with the other studied adducts was observed in humans, nor was an increase in tobacco smokers observed. A small increase was observed in rodents exposed to glycidol. The formation of the HPA-Val adduct upon incubation of blood with glycidic acid (an epoxide) was shown. The relatively high adduct levels observed in vivo in relation to the measured reactivity of the epoxide, and the fact that the epoxide is not described as naturally occurring, suggest that glycidic acid is not the only precursor of the HPA-Val adduct identified in vivo. Another endogenous electrophile is suspected to contribute to the in vivo HPA-Val adduct level.
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Karlsson, Isabella,1980-Stockholms universitet,Institutionen för miljövetenskap,Stockholm Univ, Dept Environm Sci, SE-10691 Stockholm, Sweden.(Swepub:su)iskar
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Aasa, JennySwedish Food Agcy, Dept Risk & Benefit Assessment, SE-75126 Uppsala, Sweden.
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Carlsson, Henrik,1987-Uppsala universitet,Klinisk kemi(Swepub:uu)henca829
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Motwani, Hitesh Vijay,1981-Stockholms universitet,Institutionen för miljövetenskap,Stockholm Univ, Dept Environm Sci, SE-10691 Stockholm, Sweden.(Swepub:su)himo8919
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Pedersen, MarieUniv Copenhagen, Dept Publ Hlth, DK-1353 Copenhagen, Denmark.
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Eriksson, Johan,1956-Stockholms universitet,Institutionen för miljövetenskap,Stockholm Univ, Dept Environm Sci, SE-10691 Stockholm, Sweden.(Swepub:su)johaner
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Törnqvist, Margareta,1953-Stockholms universitet,Institutionen för miljövetenskap,Stockholm Univ, Dept Environm Sci, SE-10691 Stockholm, Sweden.(Swepub:su)mt
(author)
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Stockholms universitetInstitutionen för miljövetenskap
(creator_code:org_t)
Related titles
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In:Chemical Research in Toxicology: American Chemical Society (ACS)35:12, s. 2227-22400893-228X1520-5010
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