Background : Leakage following colorectal anastomosis surgery causes various complications associated with high morbidity and mortality, especially in pediatric patients. It might be caused by the use of non-steroidal anti-inflammatory drugs (NSAIDs) as postoperative analgesics. This study aimed to compare the effect of metamizole and paracetamol on colonic anastomosis and fibroblast activities, including proliferation, migration, and collagen synthesis, in Wistar rats. Methods: Rats were divided into control, paracetamol and metamizole groups. The colonic anastomosis was evaluated by determining the integrity of the muscle layers, the formation of granulation tissue, and mucosal anastomosis. Fibroblast activities were analyzed by measuring the proliferation, migration, and collagen synthesis. Results: Metamizole caused more damage to muscle layer integrity, more inhibition of granulation tissue formation in the anastomosis area and lower mucosal anastomosis compared with paracetamol and control groups. Metamizole had a higher cytotoxic effect than paracetamol, which suppressed the proliferation and migration of fibroblasts. Furthermore, both drugs did not affect the synthesis of collagen. Conclusion: Metamizole shows worse effects on the integrity of muscle layers, inhibition of granulation tissue formation, mucosal anastomosis, fibroblast proliferation, and migration, but not collagen synthesis, than paracetamol in Wistar rat intestines following colonic anastomosis. These findings might indicate that paracetamol is safer than metamizole as analgesic following colonic anastomosis. Key Words: colonic anastomosis; fibroblast activities; metamizole; paracetamol; Wistar rat

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On 31 Dec, 2019
On 31 Dec, 2019
Posted 27 Dec, 2019
On 27 Dec, 2019
Received 24 Dec, 2019
Invitations sent on 23 Dec, 2019
On 23 Dec, 2019
On 23 Dec, 2019
Received 23 Dec, 2019
On 22 Dec, 2019
On 21 Dec, 2019
On 21 Dec, 2019
On 21 Nov, 2019
Received 31 Oct, 2019
Received 31 Oct, 2019
On 21 Oct, 2019
On 11 Oct, 2019
Invitations sent on 10 Oct, 2019
On 30 Sep, 2019
On 26 Sep, 2019
On 25 Sep, 2019
On 23 Sep, 2019
On 31 Dec, 2019
On 31 Dec, 2019
Posted 27 Dec, 2019
On 27 Dec, 2019
Received 24 Dec, 2019
Invitations sent on 23 Dec, 2019
On 23 Dec, 2019
On 23 Dec, 2019
Received 23 Dec, 2019
On 22 Dec, 2019
On 21 Dec, 2019
On 21 Dec, 2019
On 21 Nov, 2019
Received 31 Oct, 2019
Received 31 Oct, 2019
On 21 Oct, 2019
On 11 Oct, 2019
Invitations sent on 10 Oct, 2019
On 30 Sep, 2019
On 26 Sep, 2019
On 25 Sep, 2019
On 23 Sep, 2019
Background : Leakage following colorectal anastomosis surgery causes various complications associated with high morbidity and mortality, especially in pediatric patients. It might be caused by the use of non-steroidal anti-inflammatory drugs (NSAIDs) as postoperative analgesics. This study aimed to compare the effect of metamizole and paracetamol on colonic anastomosis and fibroblast activities, including proliferation, migration, and collagen synthesis, in Wistar rats. Methods: Rats were divided into control, paracetamol and metamizole groups. The colonic anastomosis was evaluated by determining the integrity of the muscle layers, the formation of granulation tissue, and mucosal anastomosis. Fibroblast activities were analyzed by measuring the proliferation, migration, and collagen synthesis. Results: Metamizole caused more damage to muscle layer integrity, more inhibition of granulation tissue formation in the anastomosis area and lower mucosal anastomosis compared with paracetamol and control groups. Metamizole had a higher cytotoxic effect than paracetamol, which suppressed the proliferation and migration of fibroblasts. Furthermore, both drugs did not affect the synthesis of collagen. Conclusion: Metamizole shows worse effects on the integrity of muscle layers, inhibition of granulation tissue formation, mucosal anastomosis, fibroblast proliferation, and migration, but not collagen synthesis, than paracetamol in Wistar rat intestines following colonic anastomosis. These findings might indicate that paracetamol is safer than metamizole as analgesic following colonic anastomosis. Key Words: colonic anastomosis; fibroblast activities; metamizole; paracetamol; Wistar rat

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7
This is a list of supplementary files associated with this preprint. Click to download.
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