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Sökning: L773:0250 7005 OR L773:1791 7530 > (2010-2014) > Dimberg Jan

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1.
  • Dimberg, Jan, et al. (författare)
  • Detection of Cytomegalovirus DNA in Colorectal Tissue from Swedish and Vietnamese Patients with Colorectal Cancer
  • 2013
  • Ingår i: Anticancer Research. - 0250-7005 .- 1791-7530. ; 33:11, s. 4947-4950
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: Human cytomegalovirus (HCMV) has been implicated as a factor, which might be associated with colorectal cancer (CRC) progression. Data from studies with HCMV-infected tumour cell lines have highlighted an oncomodulatory potential of HCMV. In the present study, we aimed to evaluate the prevalence of HCMV DNA in CRC tissue compared to matched normal tissue, and its association with clinical factors.Patients and Methods: We used quantitative real-time polymerase chain reaction assay to detect HCMV DNA in 202 cancerous and paired normal tissue from Swedish (n=119) and Vietnamese (n=83) CRC patients.Results: Overall, the HCMV DNA rate was significantly higher in cancerous in relation to paired normal tissue. Furthermore, a significantly higher frequency (39.8%) of HCMV DNA was observed in cancer tissues from the Vietnamese patients compared to the Swedish patients (15.1%). The prevalence of HCMV DNA in CRC tissue of 50% of those with disseminated disease tended to be higher compared to those with localized disease, with a prevalence of 33.3% in Vietnamese patients.Conclusion: Our observations indicate that the prevalence of HCMV DNA differs significantly between cancer and matched normal tissues. Thus, these data support a possible role of CMV in CRC. Moreover, we noted differences between Swedish and Vietnamese patients, indicating a role of ethnicity.
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2.
  • Dimberg, Jan, et al. (författare)
  • Novel and Differential Accumulation of Mitochondrial DNA Deletions in Swedish and Vietnamese Patients with Colorectal Cancer
  • 2014
  • Ingår i: Anticancer Research. - 0250-7005 .- 1791-7530. ; 34:1, s. 147-152
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: Mitochondrial DNA (mtDNA) has been proposed to be involved in carcinogenesis and aging. The mtDNA 4977 bp deletion is one of the most frequently observed mtDNA mutations in human tissues and may play a role in colorectal cancer (CRC). In the present study, we aimed to evaluate the frequency of mtDNA 4977 bp deletion in CRC tissues and its association with clinical factors. Patients and Methods: We determined the presence of the 4977 bp common deletion in cancer and normal paired tissue samples from 105 Swedish and 88 Vietnamese patients with CRC using polymerase chain reaction (PCR) assays. Results: The mtDNA 4977 bp deletion was shown to be significantly more frequent in normal tissues in comparison with paired cancer tissues in both Swedish and Vietnamese patients. The 4977 bp common deletion was significantly more frequent in cancer tissues of the Vietnamese patients compared to the Swedish patients, and in Vietnamese cancer tissues, the 4977 bp deletion was significantly over represented in those with localized disease compared to those with disseminated disease. Moreover, we detected nine novel mtDNA deletions and found a significantly higher rate of these in CRC tissues in Swedish in comparison to Vietnamese patients. Conclusion: The mtDNA 4977 bp deletion seems to have an impact on the clinical outcome of CRC in Vietnamese patients, that the Swedish patients accumulate more of the detected novel deletions in CRC tissue compared to Vietnamese patients probably indicates divergent mechanisms in colorectal carcinogenesis.
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3.
  • Song Van, Nguyen, et al. (författare)
  • Gene Polymorphism of Matrix Metalloproteinase-12 and-13 and Association with Colorectal Cancer in Swedish Patients
  • 2013
  • Ingår i: Anticancer Research. - 0250-7005 .- 1791-7530. ; 33, s. 3247-3250
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: It has been widely reported that matrix metalloproteinases (MMPs) have fundamental roles in pathological processes in cancer through degradation of basal membranes and extracellular matrix. For MMP12 and MMP13, a functional single nucleotide polymorphism (SNP) has been detected -82A -> G (rs2276109) and -77A -> G (rs2252070), respectively. These SNPs are suggested to have an influence on different diseases. The present study evaluated the association between these SNPs in patients with colorectal cancer (CRC) patients and healthy controls. Patients and Methods: Using the TaqMan system, these SNPs were screened in 385 patients with CRC and 619 controls. Results: No significant difference in genotype distribution or in allelic frequencies was found between the two groups. However, we showed that the AA MMP-12 genotype is connected with a higher risk of disseminated CRC (Odds Ratio=1.77; 95% Confidence Interval=1.11-2.81, p=0.018). Conclusion: The results of this study suggest that the -82A -> G (rs2276109) polymorphism of the MMP12 gene reflects clinical outcome of patients with CRC.
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