Summary
Tumors derived from 105 patients with gastric cancer were subcutaneously heterotransplanted into nude mice in order to study their tumorigenicity and malignant behavior. Of the 105 gastric cancers, 45 were successfully transplanted (a 42.9% tumorigenesis rate). The tumorigenesis rate of Borrmann type 1 and 2 cancers (77.8%) was significantly higher than that of type 3 and 4 cancers (34.6%). Also, the tumorigenesis rate of differentiated carcinoma (57.1 %) was significantly higher than that of undifferentiated carcinoma (30.9%). Spontaneous metastases from the subcutaneous tumors were observed in 5 of the 37 established tumor lines (13.5%), and macroscopic pulmonary metastases were common with one tumor line (SCK-29). Although most of the subcutaneous gastric cancers showed local expansion without distant metastasis, the same tumor cells implanted into the peritoneal cavity exhibited invasive growth and/or metastasis. Thus, the expression of a metastatic pheno-type by human gastric cancer was influenced by the host microenvironment. The SCK-29 tumor line with its high metastatic potential may be useful for studies on the mechanism of blood-borne metastasis.
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Abbreviations
- pap:
-
papillary adenocarcinoma
- tub1 :
-
well-differentiated adenocarcinoma
- tub2 :
-
moderately differentiated adenocarcinoma
- por:
-
poorly differentiated adenocarcinoma
- sig:
-
signet-ring cell adenocarcinoma
- muc:
-
mucinus adenocarcinoma
- giant:
-
giant cell adenocarcinoma
- ud:
-
undifferentiated adenocarcinoma
- ade:
-
ascitic adenocarcinoma
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This study was supported in part by a grant-in aid for cancer research (B.no. 63480309) from the Ministry of Education, Science and Culture, Japan
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Takao, S., Shimazu, H., Maenohara, S. et al. Tumorigenicity, invasion, and metastasis of human gastric cancer in nude mice. J Cancer Res Clin Oncol 117, 533–538 (1991). https://doi.org/10.1007/BF01613284
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DOI: https://doi.org/10.1007/BF01613284