start-ver=1.4
cd-journal=joma
no-vol=119
cd-vols=
no-issue=10
article-no=
start-page=3172
end-page=3181
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2009
dt-pub=20091001
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=A simple biological imaging system for detecting viable human circulating tumor cells
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=The presence of circulating tumor cells (CTCs) in the peripheral blood is associated with short survival, making the detection of CTCs clinically useful as a prognostic factor of disease outcome and/or a surrogate marker of treatment response. Recent technical advances in immunocytometric analysis and quantitative real-time PCR have made it possible to detect a few CTCs in the blood; however, there is no sensitive assay to specifically detect viable CTCs. Here, we report what we believe to be a new approach to visually detect live human CTCs among millions of peripheral blood leukocytes, using a telomerase-specific replication-selective adenovirus expressing GFP. First, we constructed a GFP-expressing attenuated adenovirus, in which the telomerase promoter regulates viral replication (OBP-401; TelomeScan). We then used OBP-401 to establish a simple ex vivo method that was able to detect viable human CTCs in the peripheral blood. The detection method involved a 3-step procedure, including the lysis of rbc, the subsequent addition of OBP-401 to the cell pellets, and an automated scan using fluorescence microscopy. OBP-401 infection increased the signal-to-background ratio as a tumor-specific probe, because the fluorescent signal was amplified only in viable, infected human tumor cells, by viral replication. This GFP-expressing virus-based method is remarkably simple and allows precise enumeration of CTCs.
en-copyright=
kn-copyright=

en-aut-name=KojimaToru
en-aut-sei=Kojima
en-aut-mei=Toru
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=

en-aut-name=HashimotoYuuri
en-aut-sei=Hashimoto
en-aut-mei=Yuuri
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=

en-aut-name=WatanabeYuichi
en-aut-sei=Watanabe
en-aut-mei=Yuichi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=

en-aut-name=KagawaShunsuke
en-aut-sei=Kagawa
en-aut-mei=Shunsuke
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=

en-aut-name=UnoFutoshi
en-aut-sei=Uno
en-aut-mei=Futoshi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=5
ORCID=

en-aut-name=KurodaShinji
en-aut-sei=Kuroda
en-aut-mei=Shinji
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=6
ORCID=

en-aut-name=TazawaHiroshi
en-aut-sei=Tazawa
en-aut-mei=Hiroshi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=7
ORCID=

en-aut-name=KyoSatoru
en-aut-sei=Kyo
en-aut-mei=Satoru
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=8
ORCID=

en-aut-name=MizuguchiHiroyuki
en-aut-sei=Mizuguchi
en-aut-mei=Hiroyuki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=9
ORCID=

en-aut-name=UrataYasuo
en-aut-sei=Urata
en-aut-mei=Yasuo
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=10
ORCID=

en-aut-name=TanakaNoriaki
en-aut-sei=Tanaka
en-aut-mei=Noriaki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=11
ORCID=

en-aut-name=FujiwaraToshiyoshi
en-aut-sei=Fujiwara
en-aut-mei=Toshiyoshi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=12
ORCID=

affil-num=1
en-affil=
kn-affil=Division of Surgical Oncology, Department of Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences

affil-num=2
en-affil=
kn-affil=Division of Surgical Oncology, Department of Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences

affil-num=3
en-affil=
kn-affil=Division of Surgical Oncology, Department of Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences

affil-num=4
en-affil=
kn-affil=Division of Surgical Oncology, Department of Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences

affil-num=5
en-affil=
kn-affil=Division of Surgical Oncology, Department of Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences

affil-num=6
en-affil=
kn-affil=Division of Surgical Oncology, Department of Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences

affil-num=7
en-affil=
kn-affil=Center for Gene and Cell Therapy, Okayama University Hospital

affil-num=8
en-affil=
kn-affil=Department of Obstetrics and Gynecology, Kanazawa University School of Medicine

affil-num=9
en-affil=
kn-affil=Department of Biochemistry and Molecular Biology, Graduate School of Pharmaceutical Sciences, Osaka University

affil-num=10
en-affil=
kn-affil=Oncolys BioPharma Inc.

affil-num=11
en-affil=
kn-affil=Division of Surgical Oncology, Department of Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences

affil-num=12
en-affil=
kn-affil=Division of Surgical Oncology, Department of Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences
END