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2011 Fiscal Year Final Research Report

Development of the new cancer cell detection method using a modified

Research Project

  • PDF
Project/Area Number 21590999
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Respiratory organ internal medicine
Research InstitutionKyushu University

Principal Investigator

TAKAYAMA Koichi  九州大学, 医学研究院, 准教授 (50274444)

Co-Investigator(Kenkyū-buntansha) HARADA Taishi  九州大学, 大学病院, 講師 (10380619)
IZUMI Miiru  九州大学, 大学病院, 講師 (60336021)
Project Period (FY) 2009 – 2011
Keywords癌 / ウィルス / 細胞・組織
Research Abstract

In this study, the adenoviral vector that was modified in fiber region was used as a cancer cell detection tool. The modified adenovirus has a serotype 3 adenoviral fiber protein on the serotype 5 adenovirus, and is reported to show the high infectivity to various cancer cells in the previous paper. The purpose of this study is to improve the diagnosis accuracy for malignant pleuritis or ascites in cytological examination in combination with the modified adenoviral vector. A fire fly luciferase cDNA or GFP cDNA driven by CMV promoter are recombinated into the modified adenoviral genome using the homologous recombination method. Cancer cells infected with this recombinant modified adenoviral vectors showed a high luciferase activity or green lumination under the fluorescent microscopy. Using a diluted serum including fixed number of cancer cells as an artificial malignant effusion, the recombinant modified adenoviral vector was confirmed to detect only 10 cancer cells after RBC cells we … More re lysed out. For the clinical samples including various benign or malignant pleural effusion and ascites, the sensitivity and specificity in the diagnosis were xx% and xx%, respectively. The diagnosis accuracy with this method is a little better than that in usual cytological examination. However, in the malignant effusion with hematological malignancies like a lymphoma, the sensitivity is relatively low probably due to the lack of receptor protein for adenovirus infection on the surface of these malignant cells. On the other hand, some benign effusion also showed the higher luciferase activity resulting a pseudo-positive specimen. With a GFP expressiong modified adenoviral vector, some contaminated mesothelial cells were also infected with viral vector, and might deteriorate the diagnosis specificity. In conclusion, this method is suggested to be useful for cancer cell detection in the effusion samples in combination with cytological examination. Using a tumor specific promoter instead with CMV promoter, the diagnosis accuracy is suggested to be improved. Less

  • Research Products

    (2 results)

All 2011 2010

All Presentation (2 results)

  • [Presentation] Cancer Cell Detection using Modified Viral Vector2011

    • Author(s)
      K. Takayama
    • Organizer
      6th Congress of the Asian Pacific Society of Respirology
    • Year and Date
      20110000
  • [Presentation] キメラ型アデノウィルスを用いた肺癌診断2010

    • Author(s)
      中垣憲明、高山浩一、内野順治、出水みいる、久末順子、中西洋一
    • Organizer
      第50回日本肺癌学会総会
    • Year and Date
      20100000

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Published: 2013-07-31  

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