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Absence of morphological, chromosomal and antigenic changes in the K-562 cell line growing as localized or disseminated tumours in nude mice.

Transplantation of K-562 cells into adult and newborn nude mice led to the development of localized s.c. and disseminated myelosarcomas, respectively. This age-associated, changing pattern of in vivo proliferation of K-562 cells derived from a single aliquot was consistently repeated throughout sequ...

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Autores principales: Machado, E. A., Mitchell, J. R., Lozzio, B. B., Lozzio, C. B., Gerard, D. A.
Formato: Texto
Lenguaje:English
Publicado: Nature Publishing Group 1982
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2011137/
https://www.ncbi.nlm.nih.gov/pubmed/6957238
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author Machado, E. A.
Mitchell, J. R.
Lozzio, B. B.
Lozzio, C. B.
Gerard, D. A.
author_facet Machado, E. A.
Mitchell, J. R.
Lozzio, B. B.
Lozzio, C. B.
Gerard, D. A.
author_sort Machado, E. A.
collection PubMed
description Transplantation of K-562 cells into adult and newborn nude mice led to the development of localized s.c. and disseminated myelosarcomas, respectively. This age-associated, changing pattern of in vivo proliferation of K-562 cells derived from a single aliquot was consistently repeated throughout sequential passages. The only variable in this experimental system was the age of the recipient mice. Not only did the mice have an identical genetic background, but also the transplanted K-562 cells were derived from a single culture passage. As shown by cytological and histological examinations, the characteristic morphology and percentage composition of the subpopulations of the K-562 cell line were preserved in successive in vitro and in vivo passages. The K-562 cells had no prevailing phenotypic traits which could be associated with the growth either in the s.c. tissue or in the viscera. Furthermore, the cells maintained the human karyotype, including their typical chromosomal abnormalities and antigenic determinants, as demonstrated by the binding of a specific antibody, throughout all passages. Our results demonstrate that heterotransplanted K-562 cells may change their behaviour in vivo without undergoing modifications associated with different types of growth. These findings would indicate that the ability of neoplastic cells to proliferate in various environments (metastases) is not the consequence of predetermined cellular characteristics but is functionally conditioned. IMAGES:
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spelling pubmed-20111372009-09-10 Absence of morphological, chromosomal and antigenic changes in the K-562 cell line growing as localized or disseminated tumours in nude mice. Machado, E. A. Mitchell, J. R. Lozzio, B. B. Lozzio, C. B. Gerard, D. A. Br J Cancer Research Article Transplantation of K-562 cells into adult and newborn nude mice led to the development of localized s.c. and disseminated myelosarcomas, respectively. This age-associated, changing pattern of in vivo proliferation of K-562 cells derived from a single aliquot was consistently repeated throughout sequential passages. The only variable in this experimental system was the age of the recipient mice. Not only did the mice have an identical genetic background, but also the transplanted K-562 cells were derived from a single culture passage. As shown by cytological and histological examinations, the characteristic morphology and percentage composition of the subpopulations of the K-562 cell line were preserved in successive in vitro and in vivo passages. The K-562 cells had no prevailing phenotypic traits which could be associated with the growth either in the s.c. tissue or in the viscera. Furthermore, the cells maintained the human karyotype, including their typical chromosomal abnormalities and antigenic determinants, as demonstrated by the binding of a specific antibody, throughout all passages. Our results demonstrate that heterotransplanted K-562 cells may change their behaviour in vivo without undergoing modifications associated with different types of growth. These findings would indicate that the ability of neoplastic cells to proliferate in various environments (metastases) is not the consequence of predetermined cellular characteristics but is functionally conditioned. IMAGES: Nature Publishing Group 1982-09 /pmc/articles/PMC2011137/ /pubmed/6957238 Text en https://creativecommons.org/licenses/by/4.0/This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit https://creativecommons.org/licenses/by/4.0/.
spellingShingle Research Article
Machado, E. A.
Mitchell, J. R.
Lozzio, B. B.
Lozzio, C. B.
Gerard, D. A.
Absence of morphological, chromosomal and antigenic changes in the K-562 cell line growing as localized or disseminated tumours in nude mice.
title Absence of morphological, chromosomal and antigenic changes in the K-562 cell line growing as localized or disseminated tumours in nude mice.
title_full Absence of morphological, chromosomal and antigenic changes in the K-562 cell line growing as localized or disseminated tumours in nude mice.
title_fullStr Absence of morphological, chromosomal and antigenic changes in the K-562 cell line growing as localized or disseminated tumours in nude mice.
title_full_unstemmed Absence of morphological, chromosomal and antigenic changes in the K-562 cell line growing as localized or disseminated tumours in nude mice.
title_short Absence of morphological, chromosomal and antigenic changes in the K-562 cell line growing as localized or disseminated tumours in nude mice.
title_sort absence of morphological, chromosomal and antigenic changes in the k-562 cell line growing as localized or disseminated tumours in nude mice.
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2011137/
https://www.ncbi.nlm.nih.gov/pubmed/6957238
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