Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: UNIPROT:Q9UID6 (Kruppel-like)
 147 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Glioblastoma multiforme (GBM) is the most common and aggressive primary brain tumor and possesses a high incidence of 10p loss. The KLF6 (Kruppel-like transcription factor) tumor suppressor gene on 10p15 is inactivated by loss of heterozygosity (LOH) and/or somatic mutation in a number of human cancers and forced expression of KLF6 in GBM lines inhibits their growth and transformation. In addition, increased expression of its alternatively spliced, cytoplasmic isoform KLF6-SV1 has now been shown to play a role in cancer pathogenesis. On the basis of these findings we examined the role of KLF6 and KLF6-SV1 in the development and progression of GBM. LOH analysis of 17 primary GBM patient samples using KLF6-specific microsatellite markers revealed that 88.2% (15/17) had LOH of the KLF6 locus. Interestingly, no KLF6 somatic mutations were identified. RNA analysis revealed concomitant decreases in all primary GBM tumors (n = 11) by approximately 80% in KLF6 expression (p < 0.001) coupled with increased KLF6-SV1 expression (p < 0.001) when compared to normal astrocytes. To determine the biological relevance of these findings, we examined the effect of KLF6 expression and KLF6-SV1 knockdown in A235 and CRL2020 cell lines. Reconstitution of KLF6 decreased cell proliferation by almost 50%, whereas targeted KLF6 reduction increased cell proliferation 2.5-4.5 fold. Conversely, targeted KLF6-SV1 reduction decreased cell proliferation by 50%. Taken together, our findings demonstrate that KLF6 allelic imbalance and decreased KLF6 and increased KLF6-SV1 expression are common findings in primary GBM tumors, and these changes have antagonistic effects on the regulation of cellular proliferation in GBM cell lines.
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PMID:Functional inactivation of the KLF6 tumor suppressor gene by loss of heterozygosity and increased alternative splicing in glioblastoma. 1751 51

ZNF217 is an alternatively spliced Kruppel-like transcription factor that has recently been implicated to play a role in human carcinogenesis. Here, we used immunohistochemistry (IHC) to show that ZNF217 protein is overexpressed in nearly 60% of ovarian tumor samples. The disease-free survival time was shorter in patients with positive ZNF217 expression than in ZNF217-negative patients (P=0.042). Fluorescence in situ hybridization (FISH) analysis showed ZNF217 genomic amplification in the poorly differentiated tumors, suggesting that ZNF217 is associated with the progression of ovarian cancer. Invasion was enhanced in HO-8910 cells stably transfected with constructs carrying full-length ZNF217 relative to cells transfected with the empty vector. To confirm our findings in vivo, we performed a tumorigenicity assay in nude mice inoculated with the HO-8910 overexpressing ZNF217 cells. As expected, tumors grown in the ZNF217 group were more invasive and prone to metastasis than those formed control groups. Based on these clinical and laboratory observations, we conclude that ZNF217 may contribute to ovarian cancer invasion and metastasis, and associated with worse clinical outcomes.
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PMID:ZNF217 is associated with poor prognosis and enhances proliferation and metastasis in ovarian cancer. 2503 22