| 1. |
- Djureinovic, Tatjana, et al.
(författare)
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The CHEK2 1100delC variant in Swedish colorectal cancer
- 2006
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Ingår i: Anticancer Research. - 0250-7005 .- 1791-7530. ; 26:6C, s. 4885-4888
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: The cell cycle checkpoint kinase 2 (CHEK2) 1100delC variant has recently been identified at high frequency in families with both breast and colorectal cancer, suggesting the possible role of this variant in colorectal cancer predisposition. PATIENTS AND METHODS: To evaluate the role of CHEK2 ll00delC among Swedish colorectal cancer patients, the variant frequency was determined in 174 selected familial cases, 644 unselected cases and 760 controls, as well as in l8 families used in the genome-wide linkage analysis, where weak linkage was seen for the region harboring the CHEK2 gene. RESULTS: CHEK2 l100delC was found in 1.15% of familial and in 0.93% of unselected cases, compared to 0.66% of controls, showing no significant difference between groups. One out of 45 familial cases with a family history of breast cancer was shown to be a carrier. The variant was not identified in the 18 families included in the linkage analysis. CONCLUSION: The CHEK2 1100delC was not significantly increased in Swedish colorectal cancer patients, however, in order to determine the role of the variant in colorectal cancer families with the history of breast cancer a larger sample size is needed.
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| 2. |
- Elander, Nils, 1980-, et al.
(författare)
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Matrix metalloproteinase (MMP) -1, -2, -3 and -9 promoter polymorphisms in colorectal cancer
- 2006
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Ingår i: Anticancer Research. - : International Institute of Anticancer Research. - 0250-7005 .- 1791-7530. ; 26:1B, s. 791-795
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Tidskriftsartikel (refereegranskat)abstract
- Background: Matrix metalloproteinases (MMPs) are a group of matrix-degrading proteins implicated in several pathological processes, e.g., invasion and metastasis in malignant diseases such as colorectal cancer (CRC). Materials and methods: One hundred and twenty-seven CRC patients and 208 controls were genotyped for MMP-1, -2, -3 and -9 promoter polymorphisms. The genotyping was performed with PCR/primer-extension/DHPLC or PCR/RFLP. Results: The MMP-1 2G allele was significantly associated with CRC (p=0.037). No significant association between CRC and MMP-2, -3 or -9 polymorphisms was evident. The analysis of polymorphisms in the clinicopathological subgroups displayed no significant associations. Conclusion: The MMP-1 promoter polymorphism seems to affect the susceptibility to CRC, while MMP-2, -3 and -9 polymorphisms appear less likely to have any impact on CRC.
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| 3. |
- Hoefig, Kai P, et al.
(författare)
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Unlocking pathology archives for microRNA-profiling
- 2008
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Ingår i: Anticancer Research. - Athens, Greece : International Institute of Anticancer Research. - 0250-7005 .- 1791-7530. ; 28:1A, s. 119-123
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Tidskriftsartikel (refereegranskat)abstract
- Background: MicroRNAs (miRNAs) are approximately 22 nucleotide long, non-coding RNAs that regulate gene expression by binding to the 3'-untranslated region of target mRNAs and also a variety of cellular processes. It has recently been established that dysregulation of miRNA expression can be detected in the majority of human cancers. A variety of high-throughput screening methods has been developed to identify dysregulated miRNA species in tumours. For retrospective clinical studies formalin-fixed, paraffin-embedded (FFPE) tissue is the most widely used material.Materials and methods: The miRNA expression profiles of freshly frozen (CRYO) and FFPE tissues of seven tonsil and four liver samples were compared, using a qPCR-based assay, profiling 157 miRNA species.Results: The significance of miRNA-profiles was barely influenced by FFPE treatment in both tissues and the variance induced by FFPE treatment was much smaller than the variance caused by biologically based differential expression.Conclusion: FFPE material is well suited for miRNA profiling.
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| 4. |
- Prenkert, Malin, et al.
(författare)
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Rapid Induction of P-Glycoprotein mRNA and Protein Expression by Cytarabine in HL-60 Cells
- 2009
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Ingår i: Anticancer Research. - Athens : International Institute of Anticancer Research. - 0250-7005 .- 1791-7530. ; 29:10, s. 4071-4076
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Tidskriftsartikel (refereegranskat)abstract
- Background: Overexpression of P-glycoprotein (P-gp), breast cancer resistance protein (BCRP) and glutathione-S-transferase π (GSTπ) is associated with drug resistance in acute myeloid leukemia (AML). The short-term effects of drug exposure on their expression levels were investigated.Materials and Methods: HL-60 cells and drug-resistant sublines were cultured with or without daunorubicin (DNR) and cytarabine (Ara-C). At several time-points the expression levels of P-gp, BCRP and GSTπ were determined.Results: After exposure to Ara-C, P-gp mRNA rapidly increased in all the cell lines. P-gp protein was detected in the sensitive cells after 8 h exposure to Ara-C. GSTπ mRNA increased in the resistant cells, but no change in BCRP mRNA was observed. Exposure to DNR revealed rapidly increased P-gp and GSTπ mRNA in the resistant cells.Conclusion: Ara-C rapidly increases P-gp mRNA and protein expression in sensitive and resistant cells, and GSTπ mRNA in resistant cells, in vitro. This may be of clinical importance during AML induction chemotherapy.
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