51. Changes of the Peptide YY Levels in the Intestinal Tissue of Rats with Experimental Colitis following Oral Administration of Mesalazine and Prednisolone
- Author
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Kenji Ikeda, Nobuo Kurokawa, Michiaki Myotoku, Yoshihiko Hirotani, and Kyoko Mikajiri
- Subjects
Male ,medicine.medical_specialty ,Prednisolone ,Anti-Inflammatory Agents ,Administration, Oral ,Pharmaceutical Science ,Ileum ,chemistry.chemical_compound ,Mesalazine ,Intestinal mucosa ,Oral administration ,Internal medicine ,medicine ,Animals ,Peptide YY ,Intestinal Mucosa ,Rats, Wistar ,Colitis ,Mesalamine ,Pharmacology ,business.industry ,Anti-Inflammatory Agents, Non-Steroidal ,Dextran Sulfate ,digestive, oral, and skin physiology ,medicine.disease ,Ulcerative colitis ,digestive system diseases ,Rats ,Disease Models, Animal ,medicine.anatomical_structure ,Endocrinology ,chemistry ,Colitis, Ulcerative ,business ,hormones, hormone substitutes, and hormone antagonists ,medicine.drug - Abstract
Few studies have reported the changes in the peptide YY (PYY) levels in the intestinal tissue of rats with ulcerative colitis (UC) following oral administration of mesalazine and prednisolone. We investigated the effects of these drugs on the intestinal mucosal PYY levels in a rat model of UC. We confirmed that the PYY levels in the rat intestinal mucosal tissue were high in the lower intestinal tract. The leukocyte count and hemoglobin levels approached the normal values after administering mesalazine or prednisolone to rats treated with 3% dextran sulfate sodium (DSS). The PYY levels in the caecum and colon decreased significantly after administering DSS but increased when mesalazine was administered in a tissue-specific manner. Unlike mesalazine, the PYY levels increased in the ileum in addition to the colon and rectum after administering prednisolone. However, neither of the drugs induced any changes in the plasma PYY levels. These findings indicate that changes in the intestinal tissue PYY levels may be partially involved in the improvement of DSS-induced UC in rats following the administration of these drugs.
- Published
- 2008
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