eISSN: 1897-4309
ISSN: 1428-2526
Contemporary Oncology/Współczesna Onkologia
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2/2016
vol. 20
 
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abstract:
Original paper

Expression of insulin-like growth factor family genes in clear cell renal cell carcinoma

Ryszard Braczkowski
,
Michał Białożyt
,
Marta Plato
,
Urszula Mazurek
,
Bogumiła Braczkowska

Contemp Oncol (Pozn) 2016; 20 (2): 130-136
Online publish date: 2016/06/14
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Aim of the study: 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.

Material and 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
keywords:

insulin-like growth factors, clear cell renal cell carcinoma, RT-PCR

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