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Multivariate analysis of matrix-assisted laser desorption/ionization mass spectrometric data related to glycoxidation products of humanglobins in nephropathic patients (Articolo in rivista)

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Multivariate analysis of matrix-assisted laser desorption/ionization mass spectrometric data related to glycoxidation products of humanglobins in nephropathic patients (Articolo in rivista) (literal)

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Annunziata Lapolla,a; Eugenio Ragazzi,b; Barbara Andretta,c; Domenico Fedele,a; Michela Tubaro,d; Roberta Seraglia,d; Laura Molin,d; Pietro Traldi,d (2007)
Multivariate analysis of matrix-assisted laser desorption/ionization mass spectrometric data related to glycoxidation products of humanglobins in nephropathic patients
in Journal of the American Society for Mass Spectrometry; Elsevier Science Inc., New York (Stati Uniti d'America)
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Annunziata Lapolla,a; Eugenio Ragazzi,b; Barbara Andretta,c; Domenico Fedele,a; Michela Tubaro,d; Roberta Seraglia,d; Laura Molin,d; Pietro Traldi,d (literal)

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1,4 : Dipartimento di Scienze Mediche e Chirurgiche, Università di Padova, Padova, Italy / 2 : Dipartimento di Farmacologia e Anestesiologia, Università di Padova, Padova, Italy / 3 : Dipartimento di Pediatria, Università di Padova, Padova, Italy / 5-8 : CNR-ISTM, Corso Stati Uniti 4, Padova, Italy (literal)

Titolo

Multivariate analysis of matrix-assisted laser desorption/ionization mass spectrometric data related to glycoxidation products of humanglobins in nephropathic patients (literal)

Abstract

To clarify the possible pathogenetic role of oxidation products originated from the glycation of proteins, human globins from nephropathic patients have been studied by matrix-assisted laser desorption/ionization mass spectrometry (MALDI), revealing not only unglycated and monoglycated globins, but also a series of different species. For the last ones, structural assignments were tentatively done on the basis of observed masses and expectations for the Maillard reaction pattern. Consequently, they must be considered only propositive, and the discussion which will follow must be considered in this view. In our opinion this approach does not seem to compromise the intended diagnostic use of the data because distinctions are valid even if the assignments are uncertain. We studied nine healthy subjects and 19 nephropathic patients and processed the data obtained from the MALDI spectra using a multivariate analysis. Our results showed that multivariate analytical techniques enable differential aspects of the profile of molecular species to be identified in the blood of end stage nephropathic patients. A correct grouping can be achieved by principal component analysis (PCA) and the results suggest that several products involved in carbonyl stress exist in nephropathic patients. These compounds may have a relevant role as specific markers of the pathological state. (J Am Soc Mass Spectrom 2007, 18, 1018-1023) © 2007 American Society for Mass Spectrometry (literal)

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