Advances in Clinical and Experimental Medicine

Title abbreviation: Adv Clin Exp Med
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ISSN 1899–5276 (print)
ISSN 2451-2680 (online)
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Advances in Clinical and Experimental Medicine

2019, vol. 28, nr 10, October, p. 1429–1436

doi: 10.17219/acem/109342

Publication type: original article

Language: English

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Is intestinal stasis sufficient by itself in promoting enterocolitis in a non-genetic rat model of Hirschsprung’s disease?

Magdalini Mitroudi1,A,B,C,D,E,F, Dimitra Psalla2,A,B,E, Konstantina Kontopoulou3,B,E,F, Konstantinos Theocharidis4,B,F, Dimitrios Sfoungaris1,A,C,D,E,F

1 1st Department of Pediatric Surgery, Aristotelion University of Thessaloniki, General Hospital G. Gennimatas, Greece

2 Laboratory of Pathology, School of Health Sciences, Faculty of Veterinary Medicine, Aristotelion University of Thessaloniki, Greece

3 Laboratory of Microbiology. G. Gennimatas General Hospital, Thessaloniki, Greece

4 Department of Pathology, G. Gennimatas General Hospital, Thessaloniki, Greece

Abstract

Background. Hirschsprung’s disease-associated enterocolitis (HE) is a life-threatening septic complication of Hirschsprung’s disease (HD), leading to bacterial translocation (BT) and sepsis. Many factors, such as intestinal stasis, HD-related inherited immune disorders and abnormal mucosal secretion have been implicated in its pathogenesis.
Objectives. To investigate the effect of intestinal stasis as an independent factor in the pathogenesis of HE intestinal lesions and its systematic effects.
Material and Methods. The rectal ganglion cells of 46 Wistar rats were chemically ablated through local benzalkonium chloride (BAC) injection, in order to create a HD model (megacolon rats) that does not carry the possible genetic burden of HD. The animals were sacrificed either on the 20th or 25th day after ablation and were examined for histopathological changes on the wall of the small intestine, presence of bacterial translocation in body organs, body biometrics, and white blood cell count (WBC) and hemoglobin concentration. The results were compared to control animals.
Results. In the megacolon rats, severe damage on the small intestine as well as BT proportional to the extent of the intestinal damage and to the time elapsed after ablation was observed. Significant effects on the WBCs, hemoglobin concentration and biometric parameters were also observed.
Conclusion. In megacolon rats, intestinal stasis can lead by itself to a full-blown HE. The HE lesions that promote BT are present even in regions distant from the aganglionic bowel and are proportional to the time elapsed under the influence of intestinal stasis. Systematic effects such as growth retardation are also produced.

Key words

sepsis, bacterial translocation, intestinal obstruction, megacolon, ganglion cell ablation

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