Separation of VX-2 rabbit carcinoma-derived cells capable of releasing collagenase

Mustafa Kh Dabbous, Mahmoud El-Torky, Lena Haney, Nahed Sobhy, Sr Burcharda Brinkley

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Primary and secondary cultures of VX-2 carcinoma produced high levels of collagenase activity in both active and latent forms in serum-free media. These cultures appeared morphologically heterogeneous in phase-contrast microscopy and revealed the presence of mainly three distinct forms; epithelial-like cells (E cells), fibroblast-like cells (F cells), and large rounded-flat cells which may represent a subclass of the F cells. Cell separation techniques such as brief dispase treatment, Percoll gradient centrifugation, thimerosal treatment, and rabbit serum were used to obtain predominantly one form or the other. The E cells never formed a monolayer but rather grew as limited size clusters of intimately associated cells with large nuclei and often appeared multinucleated. These cells were difficult to maintain in culture or serially passed more than a few times. The F cells, rare in early cultures but having the highest growth potential, appeared in various morphological forms ranging from spindle- to stellate-shaped cells. The cells in their third passage were capable of producing palpable tumors, similar in light and electron microscopic studies to the original tumor from which they were derived, when injected intramuscularly into recipient rabbits and produced specific collagenase activity in active and latent forms in serum-free media. Ultrastructural studies suggested that the E cells were of epithelial origin whereas the F cells were similar to stromal fibroblasts. Cytogenetic studies demonstrated that almost all of the E cells showed both numerical and structural chromosomal changes in a modal number of 54 chromosomes. On the other hand, the major cell population of the F cells resembled normal rabbit fibroblasts; both contained a normal diploid (2n = 44). However, few cells (4-6%) in the F-cell population were hyperdiploid with a modal chromosome number of 54. These cells may represent inadvertent contaminating E cells and account for the apparent limited turmorigenicity observed in early F-cell cultures. The data suggested that the E cells were of tumor origin whereas the majority of the F-cell population appeared to be of host origin. Furthermore, it is suggested that the E cells stimulate tumor-associated stromal cells to produce elevated levels of collagenolytic activity and contribute to collagen degradation during tumor invasion.

Original languageEnglish (US)
Pages (from-to)1-21
Number of pages21
JournalExperimental and Molecular Pathology
Volume38
Issue number1
DOIs
StatePublished - 1983
Externally publishedYes

Fingerprint

Collagenases
Fibroblasts
Rabbits
Carcinoma
Tumors
Serum-Free Culture Media
Cells
Chromosomes
Cell culture
Thimerosal
Centrifugation
VX
Monolayers
Microscopic examination
Collagen
Neoplasms
Degradation
Electrons
Epithelial Cells
Population

ASJC Scopus subject areas

  • Clinical Biochemistry
  • Molecular Biology
  • Pathology and Forensic Medicine

Cite this

Separation of VX-2 rabbit carcinoma-derived cells capable of releasing collagenase. / Dabbous, Mustafa Kh; El-Torky, Mahmoud; Haney, Lena; Sobhy, Nahed; Brinkley, Sr Burcharda.

In: Experimental and Molecular Pathology, Vol. 38, No. 1, 1983, p. 1-21.

Research output: Contribution to journalArticle

Dabbous, Mustafa Kh ; El-Torky, Mahmoud ; Haney, Lena ; Sobhy, Nahed ; Brinkley, Sr Burcharda. / Separation of VX-2 rabbit carcinoma-derived cells capable of releasing collagenase. In: Experimental and Molecular Pathology. 1983 ; Vol. 38, No. 1. pp. 1-21.
@article{def40b23cc774f319d08c604053e0624,
title = "Separation of VX-2 rabbit carcinoma-derived cells capable of releasing collagenase",
abstract = "Primary and secondary cultures of VX-2 carcinoma produced high levels of collagenase activity in both active and latent forms in serum-free media. These cultures appeared morphologically heterogeneous in phase-contrast microscopy and revealed the presence of mainly three distinct forms; epithelial-like cells (E cells), fibroblast-like cells (F cells), and large rounded-flat cells which may represent a subclass of the F cells. Cell separation techniques such as brief dispase treatment, Percoll gradient centrifugation, thimerosal treatment, and rabbit serum were used to obtain predominantly one form or the other. The E cells never formed a monolayer but rather grew as limited size clusters of intimately associated cells with large nuclei and often appeared multinucleated. These cells were difficult to maintain in culture or serially passed more than a few times. The F cells, rare in early cultures but having the highest growth potential, appeared in various morphological forms ranging from spindle- to stellate-shaped cells. The cells in their third passage were capable of producing palpable tumors, similar in light and electron microscopic studies to the original tumor from which they were derived, when injected intramuscularly into recipient rabbits and produced specific collagenase activity in active and latent forms in serum-free media. Ultrastructural studies suggested that the E cells were of epithelial origin whereas the F cells were similar to stromal fibroblasts. Cytogenetic studies demonstrated that almost all of the E cells showed both numerical and structural chromosomal changes in a modal number of 54 chromosomes. On the other hand, the major cell population of the F cells resembled normal rabbit fibroblasts; both contained a normal diploid (2n = 44). However, few cells (4-6{\%}) in the F-cell population were hyperdiploid with a modal chromosome number of 54. These cells may represent inadvertent contaminating E cells and account for the apparent limited turmorigenicity observed in early F-cell cultures. The data suggested that the E cells were of tumor origin whereas the majority of the F-cell population appeared to be of host origin. Furthermore, it is suggested that the E cells stimulate tumor-associated stromal cells to produce elevated levels of collagenolytic activity and contribute to collagen degradation during tumor invasion.",
author = "Dabbous, {Mustafa Kh} and Mahmoud El-Torky and Lena Haney and Nahed Sobhy and Brinkley, {Sr Burcharda}",
year = "1983",
doi = "10.1016/0014-4800(83)90094-1",
language = "English (US)",
volume = "38",
pages = "1--21",
journal = "Experimental and Molecular Pathology",
issn = "0014-4800",
publisher = "Academic Press Inc.",
number = "1",

}

TY - JOUR

T1 - Separation of VX-2 rabbit carcinoma-derived cells capable of releasing collagenase

AU - Dabbous, Mustafa Kh

AU - El-Torky, Mahmoud

AU - Haney, Lena

AU - Sobhy, Nahed

AU - Brinkley, Sr Burcharda

PY - 1983

Y1 - 1983

N2 - Primary and secondary cultures of VX-2 carcinoma produced high levels of collagenase activity in both active and latent forms in serum-free media. These cultures appeared morphologically heterogeneous in phase-contrast microscopy and revealed the presence of mainly three distinct forms; epithelial-like cells (E cells), fibroblast-like cells (F cells), and large rounded-flat cells which may represent a subclass of the F cells. Cell separation techniques such as brief dispase treatment, Percoll gradient centrifugation, thimerosal treatment, and rabbit serum were used to obtain predominantly one form or the other. The E cells never formed a monolayer but rather grew as limited size clusters of intimately associated cells with large nuclei and often appeared multinucleated. These cells were difficult to maintain in culture or serially passed more than a few times. The F cells, rare in early cultures but having the highest growth potential, appeared in various morphological forms ranging from spindle- to stellate-shaped cells. The cells in their third passage were capable of producing palpable tumors, similar in light and electron microscopic studies to the original tumor from which they were derived, when injected intramuscularly into recipient rabbits and produced specific collagenase activity in active and latent forms in serum-free media. Ultrastructural studies suggested that the E cells were of epithelial origin whereas the F cells were similar to stromal fibroblasts. Cytogenetic studies demonstrated that almost all of the E cells showed both numerical and structural chromosomal changes in a modal number of 54 chromosomes. On the other hand, the major cell population of the F cells resembled normal rabbit fibroblasts; both contained a normal diploid (2n = 44). However, few cells (4-6%) in the F-cell population were hyperdiploid with a modal chromosome number of 54. These cells may represent inadvertent contaminating E cells and account for the apparent limited turmorigenicity observed in early F-cell cultures. The data suggested that the E cells were of tumor origin whereas the majority of the F-cell population appeared to be of host origin. Furthermore, it is suggested that the E cells stimulate tumor-associated stromal cells to produce elevated levels of collagenolytic activity and contribute to collagen degradation during tumor invasion.

AB - Primary and secondary cultures of VX-2 carcinoma produced high levels of collagenase activity in both active and latent forms in serum-free media. These cultures appeared morphologically heterogeneous in phase-contrast microscopy and revealed the presence of mainly three distinct forms; epithelial-like cells (E cells), fibroblast-like cells (F cells), and large rounded-flat cells which may represent a subclass of the F cells. Cell separation techniques such as brief dispase treatment, Percoll gradient centrifugation, thimerosal treatment, and rabbit serum were used to obtain predominantly one form or the other. The E cells never formed a monolayer but rather grew as limited size clusters of intimately associated cells with large nuclei and often appeared multinucleated. These cells were difficult to maintain in culture or serially passed more than a few times. The F cells, rare in early cultures but having the highest growth potential, appeared in various morphological forms ranging from spindle- to stellate-shaped cells. The cells in their third passage were capable of producing palpable tumors, similar in light and electron microscopic studies to the original tumor from which they were derived, when injected intramuscularly into recipient rabbits and produced specific collagenase activity in active and latent forms in serum-free media. Ultrastructural studies suggested that the E cells were of epithelial origin whereas the F cells were similar to stromal fibroblasts. Cytogenetic studies demonstrated that almost all of the E cells showed both numerical and structural chromosomal changes in a modal number of 54 chromosomes. On the other hand, the major cell population of the F cells resembled normal rabbit fibroblasts; both contained a normal diploid (2n = 44). However, few cells (4-6%) in the F-cell population were hyperdiploid with a modal chromosome number of 54. These cells may represent inadvertent contaminating E cells and account for the apparent limited turmorigenicity observed in early F-cell cultures. The data suggested that the E cells were of tumor origin whereas the majority of the F-cell population appeared to be of host origin. Furthermore, it is suggested that the E cells stimulate tumor-associated stromal cells to produce elevated levels of collagenolytic activity and contribute to collagen degradation during tumor invasion.

UR - http://www.scopus.com/inward/record.url?scp=0020683865&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0020683865&partnerID=8YFLogxK

U2 - 10.1016/0014-4800(83)90094-1

DO - 10.1016/0014-4800(83)90094-1

M3 - Article

VL - 38

SP - 1

EP - 21

JO - Experimental and Molecular Pathology

JF - Experimental and Molecular Pathology

SN - 0014-4800

IS - 1

ER -