The Human Skin Volatolome: A Systematic Review of Untargeted Mass Spectrometry Analysis

0561944 - ÚFCH JH 2023 RIV CH eng J - Journal Article
Mitra, A. - Choi, S. - Boshier, P. R. - Razumovskaya-Hough, A. - Belluomo, I. - Španěl, Patrik - Hanna, G. B.
The Human Skin Volatolome: A Systematic Review of Untargeted Mass Spectrometry Analysis.
Metabolites. Roč. 12, č. 9 (2022), č. článku 824. E-ISSN 2218-1989
Institutional support: RVO:61388955
Keywords : volatile organic compounds * skin * mass spectrometry * translational science * healthy human volatolome * exogenous compounds
OECD category: Physical chemistry
Impact factor: 4.1, year: 2022
Method of publishing: Open access

The analysis of volatile organic compounds (VOCs) can provide important clinical information (entirely non-invasively), however, the exact extent to which VOCs from human skin can be signatures of health and disease is unknown. This systematic review summarises the published literature concerning the methodology, application, and volatile profiles of skin VOC studies. An online literature search was conducted in accordance with the preferred reporting items for systematic reviews and meta-analysis, to identify human skin VOC studies using untargeted mass spectrometry (MS) methods. The principal outcome was chemically verified VOCs detected from the skin. Each VOC was cross-referenced using the CAS number against the Human Metabolome and KEGG databases to evaluate biological origins. A total of 29 studies identified 822 skin VOCs from 935 participants. Skin VOCs were commonly sampled from the hand (n = 9) or forearm (n = 7) using an absorbent patch (n = 15) with analysis by gas chromatography MS (n = 23). Twenty-two studies profiled the skin VOCs of healthy subjects, demonstrating a volatolome consisting of aldehydes (18%), carboxylic acids (12%), alkanes (12%), fatty alcohols (9%), ketones (7%), benzenes and derivatives (6%), alkenes (2%), and menthane monoterpenoids (2%). Of the VOCs identified, 13% had putative endogenous origins, 46% had tentative exogenous origins, and 40% were metabolites from mixed metabolic pathways. This review has comprehensively profiled the human skin volatolome, demonstrating the presence of a distinct VOC signature of healthy skin, which can be used as a reference for future researchers seeking to unlock the clinical potential of skin volatolomics. As significant proportions of identified VOCs have putative exogenous origins, strategies to minimise their presence through methodological refinements and identifying confounding compounds are discussed.
Permanent Link: https://hdl.handle.net/11104/0334371