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Three-dimensional structure and cell kinetics at different sites of rat intestinal remnants during the early adaptive response to resection

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Research in Experimental Medicine

Summary

In this study the early phase of the morphological adaptation of rat ileum after a proximal resection of 60% has been studied using microdissection and cell labelling techniques.

Resected rats and sham-operated controls were killed 2, 4, 6, 10 and 12 days after surgery. Intraperitoneal injections of3H-thymidine were carried out 24 or 12 h prior to sacrifice. In the latter groups mitotic arrest was achieved by vincristine. A stereo-microscope was used to measure and calculate the following parameters: intestinal diameter; villus: height, width, breadth at base and apex, surface, enterocytes per 100µm length, cell pool, number of villi and absorptive surface per mm2 serosal area; crypt: length, enteroblasts per 100µm length and per column, cell columns and mitoses per crypt, cell pool, crypts, and mitoses per unit serosal area; cell kinetics: migration rate, villus transit time.

To test the influence of treatments, postoperative time course and the location of the intestinal segment and their possible interactions, factorial analyses of variance were carried out on the parameters investigated. The main findings, demonstrated for the first time, were:

  1. 1.

    An increase in the villus surface which was achieved by proportional enlargement of villus geometry;

  2. 2.

    This increase in the villus surface led to an enlarged absorptive surface per unit serosal area;

  3. 3.

    A reduction of villus transit time of the individual enterocyte;

  4. 4.

    A most pronounced magnitude of adaptative response in the proximal remnants which was gradually diminished in aboral direction, and

  5. 5.

    A sequential course of adaptative response of the various crypt parameters investigated.

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Menge, H., Hopert, R., Alexopoulos, T. et al. Three-dimensional structure and cell kinetics at different sites of rat intestinal remnants during the early adaptive response to resection. Res. Exp. Med. 181, 77–94 (1982). https://doi.org/10.1007/BF01852185

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  • DOI: https://doi.org/10.1007/BF01852185

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