Keywords : Acetic acid

Comparative treatment of induced ulcerative colitis in male rat model by using cinnarizine and sulfasalazine

Rana Kh. Atarbashe; Ahmed Abu-Raghif

Iraqi Journal of Veterinary Sciences, 2020, Volume 34, Issue 2, Pages 465-472
DOI: 10.33899/ijvs.2019.126170.1254

Ulcerative colitis is a chronic and intermittent illness. The current treatment failed to cure the disease which requires to investigate other drug with minimal side effects. The goal of the research is to assess the histological outcome, antioxidant and anti-inflammatory effects of cinnarizine in comparison with that of sulfasalazine (salazosulfapyridine) in experimentally induced colitis in rats. Acetic acid 4% (vol/vol) was used rectally to induce experimental colitis in rats. After induction, rats were administered either sulfasalazine 100mg/kg or cinnarizine 20 mg/kg as a therapeutic dose in rats orally for one week. The duration of treatment was depended on previous studies. There were estimation of histopathological and clinical parameters also the expression of cytokines (tumor necrosis factor alpha (TNF-α) and interleukin-4 (IL-4)), oxidative stress markers (malondialdehyde (MDA) and myeloperoxidase (MPO)), and adhesion molecules (intercellular adhesion molecule-1 (ICAM-1) and endothelial (E)-Selectin) in the colonic tissue. Results showed that both cinnarizine and sulfasalazine significantly reduced the clinical and histological injury in colon that induced by acetic acid. In addition to the down regulation of the increased colonic cytokines, MDA, MPO parameters and adhesive molecules. These results concluded that cinnarizine had an effective therapeutic role which is comparable with sulfasalazine on the experimental colitis through anti-inflammatory and antioxidant actions with down regulation the colonic adhesion molecule.

Evaluation of the antinociceptive effect of xylazine and it’s interaction with metoclopramide in the acute pain model in mice

Khalid A. Shaban; Muna H. Alzubaidy; Gada A. Faris

Iraqi Journal of Veterinary Sciences, 2020, Volume 34, Issue 2, Pages 383-388
DOI: 10.33899/ijvs.2019.126070.1226

The study was designed to qualitative and quantitative evaluation of the antinociceptive effect of metoclopramide and xylazine each alone or as a concomitant administration in mice. Adult albino Swiss mice weighing 20-30 mg used in all experiments. By using the hot plate test, the individual analgesic dose (ED50) of metoclopramide and xylazine detected depending on the up and down method. Isobolographic analysis used to evaluate the type of interaction between two drugs at the ratio 0.5:0.5 of individual ED50 for each drug at the level of antinociception effect. Simultaneously administration of the double dose of individual ED50 and low doses (sedative, non-analgesic doses) of both drugs, also evaluated at the level of central and visceral analgesia using a hot plate and writhing response test respectively. The individual ED50 of xylazine and metoclopramide was 10.8 and 25.6mg/kg IP respectively. A synergistic interaction at the level of analgesia explored between two drugs at ratio 0.5:0.5 which represented as decreased in ED50 of metoclopramide and xylazine by 58.75 and 58.15% respectively. The animal suffered from only slight sedation and docile. Simultaneously IP administration of xylazine and metoclopramide at double dose of ED50 for each drug-induced significant increase in latency time of thermal response, as well as a significant decrease in writhes number, which induced by acetic acid in comparison with control groups. The percentage of analgesia at sub analgesic doses of a concomitant administration of both drugs was 100% in comparison with each drug alone. These results suggested safe and good use of both drugs in veterinary medicine.