title: Gene regulation of pteridine reductase 1 in leishmania promastigotes and amastigotes using a full-length antisense construct.
abstract: BACKGROUND
  Pteridine metabolic pathway is unusual features of Leishmania, which is necessary for the growth of parasite. Leishmania has evolved a complex and versatile pteridine salvage network which has the ability of scavenging a wide area of the conjugated and unconjugated pteridines especially folate and biopterin. In this study, we focus on the inhibition of ptr1 gene expression.
  
  
  METHODS
  L. major ptr1 gene was cloned into pcDNA3 and digested using KpnI and BamHI. The gene was subcloned so that antisense will transcribe and called pcDNA-rPTR. Leishmania major was cultured and late logarithmic-phase promastigotes were harvested. The promastigotes were divided into two groups. One group was transfected with 50 µg of pcDNA-rPTR, whereas the other group was transfected with pcDNA3. Transfected cells were cultured and plated onto semi-solid media. Mouse pritonean macrophages were transfected using pcDNA-rPTR-tansfected promastigotes. Western blotting was performed on mouse transfected pritonean macrophages and extracts from transfected promastigotes of L. major using a L. major ptr1 antibody raised in rabbits.
  
  
  RESULTS
  The PTR1 protein was not expressed in pcDNA-rPTR- tansfected promastigotes and mouse macrophage transfected with pcDNA-rPTR- tansfected promastigotes.
  
  
  CONCLUSIONS
  This approach might be used to study the pteridine salvage pathway in Leishmania or to assess the possibility of using gene expression inhibition in the treatment of leishmaniasis.
authors.affiliation: Department of Parasitology and Mycology, School of Medicine, Lorestan University of Medical Sciences, Khorramabad, Iran.
authors.forename: F
authors.initials: F
authors.lastname: Kheirandish
authors.forename: M
authors.initials: M
authors.lastname: Bandehpour
authors.forename: N
authors.initials: N
authors.lastname: Davoudi
authors.forename: N
authors.initials: N
authors.lastname: Mosaffa
authors.forename: S
authors.initials: S
authors.lastname: Dawood
authors.forename: B
authors.initials: B
authors.lastname: Kazemi
authors.forename: A
authors.initials: A
authors.lastname: Haghighi
authors.forename: A
authors.initials: A
authors.lastname: Khamesipour
authors.forename: H
authors.initials: H
authors.lastname: Masjedi
authors.forename: M
authors.initials: M
authors.lastname: Mohebali
authors.forename: F
authors.initials: F
authors.lastname: Mahboudi
keywords: Antisense; Gene regulation; Inhibition; Leishmania; Pteridine reductase 1
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