In vitro platelet aggregation and oxidative stress caused by amorphous silica nanoparticles

Abderrahim Nemmar, Priya Yuvaraju, Sumaya Beegam, Javed Yasin, Rauda Al Dhaheri, Mohamed A. Fahim, Badreldin H. Ali

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Amorphous silica nanoparticles (SiNP) are being investigated for their potential use in various industrial and medical fields. Therefore, the assessment of their possible pathophysiological effect on circulating cells such as platelets is essential. We recently showed that intraperitoneal administration of SiNP causes proinflammatory and prothrombotic responses in vivo. However, little is known about the interaction of amorphous SiNP with platelets in vitro. Presently, we investigated the in vitro effects of SiNP (1, 5 and 25 μg/ml) on platelet aggregation, oxidative stress and intracellular calcium in mouse platelets. Incubation of platelets with SiNP caused a significant and dose-dependent platelet aggregation. Similarly, the activity of lactate dehydrogenase (as a marker of cell membrane integrity) was significantly increased by SiNP. Total antioxidant activity and lipid platelets vulnerability to in vitro peroxidation (measured by malondialdehyde production) were significantly increased after SiNP exposure. Additionally, SiNP exposure significantly increased the cytosolic calcium concentration. In conclusion, our in vitro data show that incubation of platelets with SiNP caused platelet aggregation, oxidative stress and increased intracellular calcium. This finding provides evidence on the toxicity of SiNP on platelet physiology.

Original languageEnglish
Pages (from-to)27-33
Number of pages7
JournalInternational Journal of Physiology, Pathophysiology and Pharmacology
Volume7
Issue number1
Publication statusPublished - 2015

Keywords

  • Amorphous silica nanoparticles
  • Mice
  • Oxidative stress
  • Platelets

ASJC Scopus subject areas

  • Physiology (medical)
  • Physiology
  • Pathology and Forensic Medicine

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