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Sökning: WFRF:(Ramqvist Torbjörn) > (2007-2009)

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  • Dahlstrand, Hanna, et al. (författare)
  • Human papillomavirus accounts both for increased incidence and better prognosis in tonsillar cancer.
  • 2008
  • Ingår i: Anticancer Research. - 0250-7005 .- 1791-7530. ; 28:2B, s. 1133-8
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>The aim of this review is to present the current knowledge on the status and significance of human papillomavirus (HPV) in tonsillar cancer. An increase in the incidence of tonsillar cancer has been reported and recent data suggest that this increase is due to an increased proportion of HPV in these tumours. Furthermore, patients with HPV positive cancer have been shown to have a lower risk of relapse and longer survival compared to patients with HPV-negative tonsillar cancer. Tailoring individual treatment in tonsillar cancer may be of importance in order to reduce patient suffering as well as to increase patient survival. Finally, the fact that the presence of HPV-type 16 E6 and E7 mRNA has been ascertained in tonsillar cancer suggests that HPV-16 indeed is an aetiological factor associated with the disease and that preventive vaccination for this patient group should be discussed.</p>
  • Eriksson, Mathilda, et al. (författare)
  • Utilization of a right-handed coiled-coil protein from archaebacterium Staphylothermus marinus as a carrier for cisplatin
  • 2009
  • Ingår i: Anticancer Research. - 0250-7005 .- 1791-7530. ; 29:1, s. 11-18
  • Tidskriftsartikel (refereegranskat)abstract
    • <p><strong>BACKGROUND:</strong></p> <p>The nano-sized right-handed coiled-coil (RHCC) protein, originating from the archaebacterium Staphylothermus marinus, is stable at high salt concentrations, high temperatures, high pressures and extremes of pH. Its crystal structure reveals four hydrophobic cavities which can incorporate heavy metals. Nano-sized compounds have been used to carry cytotoxic drugs to tumours, avoiding delivery to healthy tissue, in part due to enhanced permeability in tumour blood vessels (enhanced permeability and retention effect).</p> <p><strong>MATERIALS AND METHODS:</strong></p> <p>The ability of RHCC to carry the platinum-containing chemotherapeutic drug cisplatin to cells, while retaining the cytotoxic potential was tested both in vitro and in vivo.</p> <p><strong>RESULTS:</strong></p> <p>RHCC was able to bind and enter cells in vitro and was not severely toxic or immunogenic in mice. Moreover, RHCC incorporated cisplatin, without inhibiting the cytotoxic potential of the drug against tumour cell lines in vitro or in vivo.</p> <p><strong>CONCLUSION:</strong></p> <p>RHCC can be used as a carrier of cisplatin without abrogating the effect of the drug.</p>
  • Lindquist, David, et al. (författare)
  • Human papillomavirus is a favourable prognostic factor in tonsillar cancer and its oncogenic role is supported by the expression of E6 and E7.
  • 2007
  • Ingår i: Molecular oncology. - 1878-0261. ; 1:3, s. 350-5
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>From 1970 to 2002 in the Stockholm area, we revealed a parallel three-fold increase in the incidence of tonsillar cancer and the proportion of human papillomavirus (HPV) positive tonsillar cancer cases, indicating a possible role of HPV infection in this disease. We have now examined whether HPV and viral load in pre-treatment tonsillar cancer biopsies correlates to disease prognosis, and whether the presence of HPV-16 E6 and E7 mRNA could be ascertained. The presence of HPV-16, but not viral load, in tonsillar cancer was shown to be a favourable prognostic factor for clinical outcome. Moreover, E6 and/or E7 were expressed in almost all assessable HPV-16 positive cases, supporting an oncogenic role of HPV-16 in tonsillar cancer.</p>
  • Näsman, Anders, et al. (författare)
  • Incidence of human papillomavirus (HPV) positive tonsillar carcinoma in Stockholm, Sweden : an epidemic of viral-induced carcinoma?
  • 2009
  • Ingår i: International Journal of Cancer. - 0020-7136 .- 1097-0215. ; 125:2, s. 362-6
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>In the county of Stockholm, between 1970 and 2002, we have previously reported a 3-fold parallel increase in the incidence of tonsillar squamous cell carcinoma (SCC) and the proportion of human papillomavirus (HPV) positive tonsillar SCC. Here, we have followed the above parameters in all patients (n = 120) diagnosed with tonsillar SCC during 2003-2007 in the same area, and also in correlation to our previous data. Ninety-eight pretreatment biopsies were available and presence of HPV DNA and HPV-16 E6 and E7 RNA were tested by polymerase chain reaction (PCR) and RT-PCR. Incidence data were obtained from the Swedish Cancer Registry. Data reported from 1970 to 2002 were also obtained for comparison. HPV DNA was present in 83 of 98 (85%) of the tonsillar SCC biopsies from 2003 to 2007 and 77 of these were HPV-16 positive. HPV-16 E6 and E7 RNA were found in 98% of 52 analyzed HPV-16 positive cases. The proportion of HPV-positive cancers had significantly increased both from 1970 to 2007 (p &lt; 0.0001) as well from 2000 to 2007 (p &lt; 0.01), with 68% (95% confidence interval (CI), 53-81) 2000-2002; 77% (95% CI, 63-87) 2003-2005; and 93% (95% CI, 82-99) 2006-2007. The incidence rate of HPV-positive tumors almost doubled each decade between 1970 and 2007, in parallel with a decline of HPV-negative tumors. In conclusion, the incidence of HPV-positive cancers is still increasing in the County of Stockholm, suggesting an epidemic of a virus-induced carcinoma, with soon practically all tonsillar SCC being HPV positive, as in cervical cancer.</p>
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