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Virchows Archiv B

, Volume 56, Issue 1, pp 397–405 | Cite as

Proliferative status of colonic mucosa in organ culture:3H-thymidine-labelling studies and computer modelling

  • Karen J. Finney
  • David R. Appleton
  • Paul Ince
  • James P. Sunter
  • Alexander J. Watson
Article

Summary

3H-thymidine labelling studies and a computer simulation have been employed to assess proliferative status and cellular organisation in colonic explants maintained in culture for 5 to 7 days. The one-hour flash labelling index (Is) for crypts within the middle region of expiants (5.2%) was considerably lower than that observed in vivo (8.8%). Crypt length and the distribution of labelled cells appeared similar for both situations. A computer simulation program for crypt-cell proliferation was devised, facilitating the modulation of a number of parameters including the cell-cycle time (Tc) and its component phases, the cut-off position, and cell loss at mitosis. This simulation was employed to model continuous labelling (72 h) data obtained in vitro and provided an estimate of various kinetic parameters. Data for the middle region of expiants was fitted with a Tc of 62 h, an S phase of 8 h and a cell loss factor (20%) which was consistent with histological findings. A fit to the experimental data obtained in vitro could be achieved by a model based upon a mode of cellular organisation known to occur within crypts in vivo. Therefore in vitro, the dynamic processes of crypt-cell proliferation and migration appear to be organised in the same manner as seen in vivo.

Key words

Simulation In vitro Colonic crypts 

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Copyright information

© Springer-Verlag 1989

Authors and Affiliations

  • Karen J. Finney
    • 1
  • David R. Appleton
    • 2
  • Paul Ince
    • 1
  • James P. Sunter
    • 1
  • Alexander J. Watson
    • 1
  1. 1.Department of PathologyRoyal Victoria InfirmaryNewcastle upon TyneEngland
  2. 2.Medical StatisticsUniversity of Newcastle upon TyneEngland

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