NOV mRNA levels decreased significantly in RCC compared with normal kidney tissue (p <0.001). The NOV mRNA level was higher in papillary than in clear cell RCCs (p = 0.040) and higher in G1 than G2 and 3 tumors (p = 0.01). WT1 was down-regulated in RCCs. No significant relationship was found for NOV and WT1 mRNA levels in our study.
To our knowledge this is the first study to investigate the expression level of the NOV gene in a panel of human RCC tissues together with paired normal renal tissue. Our data indicate that NOV is associated with carcinogenesis and the progression of RCC, and the NOV expression level is different in papillary-type and clear cell-type RCC. There is a possibility that the regulation of NOV expression is different from the pathway regulated by WT1.
WT1 proteins: functions in growth and differentiation Gene |
WT1 proteins: functions in growth and differentiation Gene, Volume 273, Issue 2, 8 August 2001, Pages 141-161 Volkher Scharnhorst, Alex J. van der Eb, Aart G. Jochemsen Abstract The Wilms' tumor 1 gene (WT1) has been identified as a tumor suppressor gene involved in the etiology of Wilms' tumor. Approximately 10 % of all Wilms' tumors carry mutations in the WT1 gene. Alterations in the WT1 gene have also been observed in other tumor types, such as leukemia, mesothelioma and desmoplastic small round cell tumor. Dependent on the tumor type, WT1 proteins might either function as tumor suppressor proteins or as survival factors. Mutations in the WT1 gene can also result in congenital abnormalities as observed in Denys–Drash and Frasier syndrome patients. Mouse models have proven the critical importance of WT1 expression for the development of several organs, including the kidneys, the gonads and the spleen. The WT1 proteins seem to perform two main functions. They regulate the transcription of a variety of target genes and may be involved in post-transcriptional processing of RNA. The WT1 gene encodes at least 24 protein forms. These isoforms have partially distinct biological functions and effects, which in many cases are also specific for the model system in which WT1 is studied. This review discusses the molecular mechanisms by which the various WT1 isoforms exert their functions in normal development and how alterations in WT1 may lead to developmental abnormalities and tumor growth. Purchase PDF (289 K) |
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