title: Expression of insulin-like growth factor family genes in clear cell renal cell carcinoma.
abstract: OBJECTIVE
  Despite significant progress in the pathology of clear cell renal cell carcinoma (ccRCC), diagnostic and predictive factors of major importance have not been discovered. Some hopes are associated with insulin-like growth factors. The aim of the study was to compare the expression of genes for insulin-like growth factor family in tumours and in tissue of kidneys without cancer.
  
  
  METHODS
  Fifty-two patients years with clear cell renal cell cancer were qualified to the study group; patients nephrectomised because of hydronephrosis were included in the control group. Expression of genes were evaluated by RT-PCR.
  
  
  RESULTS
  Expression of IGFR-1 gene in tumour accounts for about 60% of cases. The incidence is higher than in corresponding adjacent non-cancerous kidney tissues and higher (but with no statistical significance) than in kidney without cancer. Expression of IGFR-2 gene in tumours has not been established. The incidence of the expression in corresponding adjacent non-cancerous kidney tissues is small. Expression of this gene has been present in all specimens from kidneys without cancer. Expression of IGFBP-3 gene ascertained in all (except four) cases of ccRCC and in the majority of clippings from adjacent tissue. It was not found in kidneys from the control group. IGF-1, IGF-2, and IGFR-1 mRNA copy numbers in ccRCC were higher than in the material from the control group.
authors.affiliation: Department of Public Health, School of Public Health, Silesian Medical University, Katowice, Poland.
authors.forename: Ryszard
authors.initials: R
authors.lastname: Braczkowski
authors.affiliation: Prof. Michałowski Memory Hospital, Katowice, Poland.
authors.forename: Michał
authors.initials: M
authors.lastname: Białożyt
authors.affiliation: Department of Pharmaclogy, School of Medicine, Silesian Medical University, Katowice, Poland.
authors.forename: Marta
authors.initials: M
authors.lastname: Plato
authors.affiliation: Department of Molecular Biology, School of Pharmacology, Silesian Medical University, Katowice, Poland.
authors.forename: Urszula
authors.initials: U
authors.lastname: Mazurek
authors.affiliation: Department of Epidemiology, School of Medicine Katowice, Silesian Medical University, Katowice, Poland.
authors.forename: Bogumiła
authors.initials: B
authors.lastname: Braczkowska
keywords: RT-PCR; clear cell renal cell carcinoma; insulin-like growth factors