PLoS ONE (Jan 2012)

Profiling plasma peptides for the identification of potential ageing biomarkers in Chinese Han adults.

  • Jiapeng Lu,
  • Yuqing Huang,
  • Youxin Wang,
  • Yan Li,
  • Yujun Zhang,
  • Jingjing Wu,
  • Feifei Zhao,
  • Shijiao Meng,
  • Xinwei Yu,
  • Qingwei Ma,
  • Manshu Song,
  • Naibai Chang,
  • Alan H Bittles,
  • Wei Wang

DOI
https://doi.org/10.1371/journal.pone.0039726
Journal volume & issue
Vol. 7, no. 7
p. e39726

Abstract

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Advancing age is associated with cardiovascular disease, diabetes mellitus and cancer, and shows significant inter-individual variability. To identify ageing-related biomarkers we performed a proteomic analysis on 1890 Chinese Han individuals, 1136 males and 754 females, aged 18 to 82 years, using weak cation exchange magnetic bead based MALDI-TOF-MS analysis. The study identified 44 peptides which varied in concentration in different age groups. In particular, apolipoprotein A-I (ApoA1) concentration gradually increased between 18 to 50 years of age, the levels of fibrinogen alpha (FGA) decreased over the same age span, while albumin (ALB) was significantly degraded in middle-aged individuals. In addition, the plasma peptide profiles of FGA and four other unidentified proteins were found to be gender-dependent. Plasma proteins such as FGA, ALB and ApoA1 are significantly correlated with age in the Chinese Han population and could be employed as indicative ageing-related biomarkers.