| RRC ID |
37500
|
| 著者 |
Yoshida K, Tsujimoto H, Matsumura K, Kinoshita M, Takahata R, Matsumoto Y, Hiraki S, Ono S, Seki S, Yamamoto J, Hase K.
|
| タイトル |
CD47 is an adverse prognostic factor and a therapeutic target in gastric cancer.
|
| ジャーナル |
Cancer Med
|
| Abstract |
CD47 is an antiphagocytic molecule that acts via ligation to signal regulatory protein alpha on phagocytes; its enhanced expression and therapeutic targeting have recently been reported for several malignancies. However, CD47 expression in gastric cancer is not well documented. Immunohistochemical expression of CD47 in surgical specimens was investigated. Expression of CD47 and CD44, a known gastric cancer stem cell marker, were investigated in gastric cancer cell lines by flow cytometry. MKN45 and MKN74 gastric cancer cells were sorted by fluorescence-activated cell sorting according to CD44 and CD47 expression levels, and their in vitro proliferation, spheroid-forming capacity, and in vivo tumorigenicity were studied. In vitro phagocytosis of cancer cells by human macrophages in the presence of a CD47 blocking monoclonal antibody (B6H12) and the survival of immunodeficient mice intraperitoneally engrafted with MKN45 cells and B6H12 were compared to experiments using control antibodies. Immunohistochemistry of the clinical specimens indicated that CD47 was positive in 57 out of 115 cases, and its positivity was an independent adverse prognostic factor. Approximately 90% of the MKN45 and MKN74 cells expressed CD47 and CD44. CD47(hi) gastric cancer cells showed significantly higher proliferation and spheroid colony formation than CD47(lo) , and CD44(hi) CD47(hi) cells showed the highest proliferation in vitro and tumorigenicity in vivo. B6H12 significantly enhanced in vitro phagocytosis of cancer cells by human macrophages and prolonged the survival of intraperitoneal cancer dissemination in mice compared to control antibodies. In conclusion, CD47 is an adverse prognostic factor and promising therapeutic target in gastric cancer.
|
| 巻・号 |
4(9)
|
| ページ |
1322-33
|
| 公開日 |
2015-9-1
|
| DOI |
10.1002/cam4.478
|
| PMID |
26077800
|
| PMC |
PMC4567017
|
| MeSH |
Adult
Aged
Animals
Antibodies, Monoclonal / pharmacology
Apoptosis / drug effects
Biomarkers, Tumor
CD47 Antigen / genetics
CD47 Antigen / metabolism*
Cell Line, Tumor
Cell Proliferation / drug effects
Cell Transformation, Neoplastic
Disease Models, Animal
Female
Gene Expression
Humans
Hyaluronan Receptors / genetics
Hyaluronan Receptors / metabolism
Immunohistochemistry
Immunophenotyping
Macrophages / drug effects
Male
Mice
Middle Aged
Molecular Targeted Therapy
Neoplasm Metastasis
Neoplasm Staging
Phagocytosis / drug effects
Prognosis
Stomach Neoplasms / diagnosis
Stomach Neoplasms / drug therapy
Stomach Neoplasms / metabolism*
Stomach Neoplasms / mortality
Xenograft Model Antitumor Assays
|
| IF |
3.491
|
| 引用数 |
40
|
|
WOS 分野
|
ONCOLOGY
|
| リソース情報 |
| ヒト・動物細胞 |
MKN7(RCB0999)
MKN45(RCB1001)
MKN74(RCB1002)
Kato III(RCB2088) |
