title: Induction of Apoptosis in the Rat Bone Marrow Mesenchymal Stem Cells Following Sodium Arsenite Treatment with the Dose Lesser than that Used for Treatment of Malignant Patient.
abstract: OBJECTIVE
  Arsenic compounds are potent human carcinogen and produce a variety of stress responses in mammalian cells. Recently sodium arsenite has been recommended to be used as anti malignancy drug by American food and drug administration (FDA). In this study, we aimed to determine the apoptosis inducing effect of sodium arsenite on rat bone marrow mesenchymal stem cells exposed in vitro.
  
  
  METHODS
  Cell morphology was studied with the help of Hoechst and propidium iodide as well as with single cell gel electrophoresis(comet assay), TUNEL assay and caspase activity base on immunocytochemistry using commercial kit were considered to study the mechanism of cell death.
  
  
  RESULTS
  Our result showed that the sodium arsenite with concentration of 0.1 µM in 36 hr induces caspase dependent apoptosis in rat bone marrow mesenchymal stem cells. This concentration is the lowest level of sodium arsenite to be reported with apoptosis induction ability in stem cells.
  
  
  CONCLUSIONS
  Since sodium arsenite is used in therapy, more research should be carried out on the effect of this chemical on stem cells, especially MSCs.
authors.affiliation: Biology Department, Faculty of Sciences, Arak University, Arak 38156-8-8349, Markazi Province, Arak, Iran.
authors.forename: Mohammad Husein
authors.initials: MH
authors.lastname: Abnosi
authors.forename: Malek
authors.initials: M
authors.lastname: Solemani Mehranjani
authors.forename: Hamidreza
authors.initials: H
authors.lastname: Momeni
authors.forename: Elham
authors.initials: E
authors.lastname: Shojafar
authors.forename: Mozhgan
authors.initials: M
authors.lastname: Barati
keywords: Apoptosis; Mesenchymal stem cells; Rats; Sodium arsenite