2017  0,977
2016  0,799
2015  0,662
2014  0,740
2013  0,739
2012  0,637
2011  0,658
2010  0,654
2009  0,570
2008  0,849
2007  0,805
2006  0,330
2005  0,435
2004  0,623
2003  0,567
2002  0,641
2001  0,490
2000  0,477
1999  0,762
1998  0,785
1997  0,507
1996  0,518
1995  0,502
Vol 53(2019) N 4 p. 606-611; DOI 10.1134/S0026893319040095 Full Text

D.V. Popov1,2*, O.L. Vinogradova1,2, V.G. Zgoda3

Preparation of Human Skeletal Muscle Samples for Proteomic Analysis with Isobaric iTRAQ Labels

1Institute of Biomedical Problems, Russian Academy of Sciences, Moscow, 123007 Russia
2Department of Fundamental Medicine, Lomonosov Moscow State University, Moscow, 119192 Russia
3Orekhovich Research Institute of Biomedical Chemistry, Moscow, 119121 Russia

Received - 2019-01-22; Revised - 2019-01-22; Accepted - 2019-02-04

In the past decade, mass spectrometry studies of skeletal muscles have become common. In this tissue, the abundance of several contractile proteins significantly limits the depth of the panoramic proteome analysis. The use of isobaric labels allows improving assessment of the changes in the protein content, while analyzing up to 10 samples in a single run. Here we present the results of a comparative study of various methods for the fractionation of skeletal muscle peptides labeled with an isobaric label iTRAQ. Samples from m. vastus lateralis of eight young males were collected with a needle biopsy. After digestion into peptides and labeling, the preparations were carried out according to three different protocols: (1) peptide purification, HPLC-MS/MS; (2) peptide purification, isoelectric focusing, HPLC-MS/MS; (3) high pH reverse-phase LC fractionation, HPLC-MS/MS. Fractionation of labeled peptides by high pH reverse-phase LC was the optimal strategy for increasing the depth of the proteome analysis. This approach, in addition to contractile and mitochondrial proteins, allowed us to detect a variety of regulatory molecules, including the nucleic acids binding the proteins, chaperones, receptors, and transcription factors.

mass spectrometry, proteome, skeletal muscle, peptide fractionation, isobaric label, Itraq