Proteomic signature of endothelial dysfunction identified in the serum of acute ischemic stroke patients by the iTRAQ-based LC-MS approach

Rakesh Sharma, Harsha Gowda, Sandip Chavan, Jayshree Advani, Dhanashree Kelkar, G. S.Sameer Kumar, Mitali Bhattacharjee, Raghothama Chaerkady, T. S.Keshava Prasad, Akhilesh Pandey, Dindagur Nagaraja, Rita Christopher

Research output: Contribution to journalArticlepeer-review

22 Scopus citations


Acute ischemic stroke (AIS) is a devastating cerebrovascular disorder that leads to permanent physical and neurological disabilities in adults worldwide. Proteins associated with stroke pathogenesis may appear in the serum of AIS patients due to blood-brain barrier dysfunction, thus permitting the development of blood-based biomarkers for early diagnosis of stroke. These biomarkers could perhaps be an adjunct to the existing imaging modalities and aid in better management and therapeutic intervention during the course of the disease. For this exploratory study, a combination of multiplexed isobaric tagging using iTRAQ reagents and high resolution tandem mass spectrometry was used to identify differentially expressed proteins in serum samples from AIS patients. The quantitative proteomic analysis of serum from both AIS and control subjects revealed 389 high confidence protein identifications and their relative levels. Among them, 60 proteins showed a ≈1.5-fold change in the AIS subjects. We verified the altered serum levels of candidate proteins such as vWF, ADAMTS13, S100A7, and DLG4 through ELISA, and the results also corroborate with the experimental findings. vWF and ADAMTS13 are key players that regulate blood hemostasis, and their altered concentration may contribute to endothelial dysfunction. S100A7 is a novel candidate protein identified in this study that is also known to mediate inflammation, endothelial proliferation, and angiogenesis.

Original languageEnglish (US)
Pages (from-to)2466-2479
Number of pages14
JournalJournal of Proteome Research
Issue number6
StatePublished - Jun 5 2015


  • LTQ-Orbitrap mass spectrometer
  • diagnostic marker
  • hemostasis
  • high density lipoprotein (HDL)
  • inflammation
  • ischemic stroke
  • low density lipoprotein (LDL)
  • thrombus

ASJC Scopus subject areas

  • Biochemistry
  • General Chemistry


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