Comparative 2D-electrophoretic mapping of human and rodent hepatic stress proteins as potential biomarkers.

F. A. Witzmann, C. Fultz, J. Lipscomb

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

Toxicologic studies in rodents demonstrate that two-dimensional polyacrylamide gel electrophoresis of proteins (2DE) is very useful in the detection and evaluation of chemical toxicity by providing information regarding cellular status at the molecular level. Identification of a set of specific biomarkers of exposure or effect, with a proclivity for both a particular rodent and human target tissue, is required for development of an electrophoretically based testing system. In this regard, stress proteins, such as the heat shock and glucose-regulated proteins (Hsp and Grp), are appropriate candidates. The present investigation was undertaken to identify these stress proteins on conventional two-dimensional electrophoretic gel patterns of human and rat liver homogenates. The following stress proteins were identified, their x, y coordinate positions mapped, and abundances determined, and these data statistically analyzed and compared: Hsp25, Hsp32, Hsp60, Hsc70, Hsp70, Hsp90, Grp75, Grp78, Grp94, protein disulfide isomerase (PDI), and ER-60. With the exception of Hsp25 and Hsp32, the stress proteins examined were constitutively expressed at detectable levels in both unstressed human and rat liver; in virtually identical patterns. Based on our results, the human hepatic 2DE stress protein pattern seems well-suited to toxicologic screening particularly in in vitro applications and via extrapolations from rodent exposures.

Original languageEnglish (US)
Pages (from-to)113-117
Number of pages5
JournalApplied and theoretical electrophoresis : the official journal of the International Electrophoresis Society
Volume5
Issue number2
StatePublished - 1995
Externally publishedYes

ASJC Scopus subject areas

  • Medicine(all)

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