Abstract
This study tested the hypothesis that alteredcolonic blood flow may contribute to tissue damageduring the development of colitis in the rabbit. Thiswas achieved by using radioactive microspheres tomeasure colonic blood flow at various times aftercolitis induction with trinitrobenzene sulfonic acid.Significant colonic damage occurred 6 hours post colitisinduction and persisted throughout the 5 day study. Blood flow to the muscularis propria andmucosa/muscularis mucosae compartments increasedsignificantly from 5 minutes until one hour postinduction. At 6 and 12 hours post induction colonicblood flow returned to control levels before increasingagain from 24 to 96 hours. This second increase in flowwas, however, predominantly in the mucosa/muscularismucosae compartment. Blood flow in the stomach and non-gastrointestinal tissues did not changesignificantly at any time. These data demonstrate thatincreased colonic blood flow may be disrupted in theearly stages of colitis and that this coincides with the onset of significant damage. It isconcluded that maintenance of elevated colonic bloodflow throughout the development of colitis may help toameliorate subsequent tissue injury.
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Appleyard, C.B., Williams, J.L., Hathaway, C.A. et al. Temporal Patterns of Colonic Blood Flow and Tissue Damage in an Animal Model of Colitis. Dig Dis Sci 44, 431–438 (1999). https://doi.org/10.1023/A:1026687424966
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DOI: https://doi.org/10.1023/A:1026687424966