2. Materials and methods
2.1. Drugs and Chemicals :
  1. Glacial acetic acid (A.A) is obtained from Elshark Al-Awsat trade, Egypt.
  2. Liraglutide (Victosa pen): 6mg/ml (Novo nordisk , Denmark).
  3. Sitagliptin (Januvia®): 100mg/Tablet (MERCK, Germany). Tablets were crushed and suspended in distilled water forming a suspension that was given orally by gavage.
  4. Sulfasalazine powder (Alexandria Company for pharmaceutical and chemical industries, Egypt).
  5. Formalin: Formaldehyde solution. 38-40 %( Al-Nasr Pharma. Chemicals, Egypt).