Variation in the monocyte proteome

Anita Hryniewicz-Jankowska, Pankaj K. Choudhary, Steven Goodman

Research output: Contribution to journalArticle

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Abstract

We have determined the variability of the monocyte proteome and identified those proteins that demonstrate the greatest variation in the general control population. Monocytes were isolated from 18 healthy (9 male and 9 female) donors ages 18-50 and with no known genetic or blood disorder. A combination of Ficoll-Paque PLUS density centrifugation of cells found in the buffy coat and positive selection with monoclonal antibodies against CD14, coupled to magnetic beads, led to >98% purity of monocytes. A 100,000 g microsomal membrane fraction or 100,000 g supernatant fraction from a control subject was compared to the equivalent fractions from a distinct control subject by two-dimensional differential gel electrophoresis (2D DIGE). Those protein spots that demonstrated Cy3-/Cy5- ratios greater than 2.5-fold in at least one experiment were selected for further statistical analysis. We determined variability for 31 cytosolic and 12 membrane protein spots. Proteins have been identified for 27 of the cytosolic protein spots and 9 of the microsomal membrane protein spots by in-gel digestion with trypsin followed by reverse-phase high-performance liquid chromatography in line with tandem mass spectrometry. We identified 24 distinct monocyte proteins that demonstrated the greatest variability in this general control population. The proteins demonstrating the greatest variance in the cytosolic fraction were enolase-1 and WD (tryptophan-aspartate) repeat-containing protein 1, and in the membrane fraction they were lamin B1 and L-plastin. This study demonstrates the importance of considering variance in the control population when performing future protein profiling comparisons of monocytes derived from disease versus control populations.

Original languageEnglish (US)
Pages (from-to)967-976
Number of pages10
JournalExperimental Biology and Medicine
Volume232
Issue number7
StatePublished - Jul 2007
Externally publishedYes

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Proteome
Monocytes
Proteins
Population
Membrane Proteins
Gels
Two-Dimensional Difference Gel Electrophoresis
Disease control
Membranes
Ficoll
Centrifugation
Phosphopyruvate Hydratase
Electrophoresis, Gel, Two-Dimensional
High performance liquid chromatography
Reverse-Phase Chromatography
Tandem Mass Spectrometry
Electrophoresis
Aspartic Acid
Tryptophan
Trypsin

All Science Journal Classification (ASJC) codes

  • Biochemistry, Genetics and Molecular Biology(all)

Cite this

Hryniewicz-Jankowska, A., Choudhary, P. K., & Goodman, S. (2007). Variation in the monocyte proteome. Experimental Biology and Medicine, 232(7), 967-976.

Variation in the monocyte proteome. / Hryniewicz-Jankowska, Anita; Choudhary, Pankaj K.; Goodman, Steven.

In: Experimental Biology and Medicine, Vol. 232, No. 7, 07.2007, p. 967-976.

Research output: Contribution to journalArticle

Hryniewicz-Jankowska, A, Choudhary, PK & Goodman, S 2007, 'Variation in the monocyte proteome', Experimental Biology and Medicine, vol. 232, no. 7, pp. 967-976.
Hryniewicz-Jankowska A, Choudhary PK, Goodman S. Variation in the monocyte proteome. Experimental Biology and Medicine. 2007 Jul;232(7):967-976.
Hryniewicz-Jankowska, Anita ; Choudhary, Pankaj K. ; Goodman, Steven. / Variation in the monocyte proteome. In: Experimental Biology and Medicine. 2007 ; Vol. 232, No. 7. pp. 967-976.
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