Cited by 11Protease and Inhibitor MechanismsCancer Cells and MetastasisBlood Coagulation and Thrombosis Mechanisms

Serine protease-induced enhancement of blood-borne metastasis of rat ascites tumour cells and its prevention with deoxyribonuclease

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Sugihara, S, Yamamoto, T, Tsuruta, J, Tanaka, J, Kambara, T, Hiraoka, T, Miyauchi, Y·1990·British Journal of Cancer

Abstract

Serine proteases, such as alpha-chymotrypsin or elastase, caused an aggregation of rat ascites tumour cell lines, AH-130, AH-109A and YS, in a protein free medium which preserved the cell viability. This aggregation, which was monitored spectrophotometrically, was dependent upon the protease activities and was resistant to treatment with either a calcium chelating reagent (EDTA) or neuraminidase. However, the tumour cell aggregates were redispersed by treatment with deoxyribonuclease I (DNase I). This dispersal effect was dependent upon the DNase activity. A possible relationship between the tumour cell aggregation and development of blood-borne metastasis was studied. An intravenous inoculation in rats of tumour cell aggregates performed by the alpha-chymotrypsin treatment resulted in significantly higher numbers of lung metastatic foci than an injection of single cells. When the re-separated single cells, prepared in vitro by treatment with DNase I following alpha-chymotrypsin treatment, were injected instead of the aggregates, the enhancement of metastasis was reversed. These enhancement and reversal effects were mimicked in vivo by intravenous injections of protease and nuclease following inoculation of a single cell suspension. That is, the number of metastatic foci caused by single cell inoculation followed by an intravenous alpha-chymotrypsin injection, was higher than that in a control group receiving PBS instead of alpha-chymotrypsin. Again, this augmentation was reversed by an injection of DNase I following alpha-chymotrypsin injection. Furthermore, an injection of DNase I alone itself reduced the starting number of metastases resulting from injection of the single tumour cell suspension. These data suggest that the metastatic behaviour of tumour cells may be increased by protease inducible DNA dependent cell aggregation should it occur in the blood stream.

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Crossref · 10.1038/bjc.1990.339

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Authors
Sugihara, S., Yamamoto, T., Tsuruta, J., Tanaka, J., Kambara, T., Hiraoka, T., & Miyauchi, Y.
Affiliations
Kumamoto University Hospital (JP)
Venue
British Journal of Cancer
Published
1990-10
Volume
62
Issue
4
Pages
607-613
ISSN
  • 0007-0920 (ISSN-L)
  • 1532-1827
OpenAlex
W2051027197
Cited by
11
References
20
Citations by year
2020: 1 · 2017: 3 · 2016: 1 · 2012: 1
FWCI
0.43
Type
journal article
Language
en
Open access
Locations
  • British Journal of Cancer (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Protease and Inhibitor Mechanisms
  • Health Sciences › Medicine › Oncology › Cancer Cells and Metastasis
  • Health Sciences › Medicine › Hematology › Blood Coagulation and Thrombosis Mechanisms
Keywords
serine protease, alpha-chymotrypsin, elastase, DNase I, hematogenous metastasis, lung metastasis, metastasis prevention, cell dispersal
MeSH terms
Animals, Cell Aggregation, Cell Survival, Deoxyribonuclease I, DNA, Edetic Acid, Female, Neoplastic Cells, Circulating, Neoplasms, Experimental, Protease Inhibitors, Serine Endopeptidases, Rats

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