title: Synergistic action of famotidine and chlorpheniramine on acetic acid-induced chronic gastric ulcer in rats.
abstract: OBJECTIVE
  To assess the synergistic action of famotidine (FMD) and chlorpheniramine (CPA) on acetic acid-induced chronic gastric ulcer in rats.
  
  
  METHODS
  Chronic gastric lesions were induced in male Sprague-Dawley (SD) rats by serosal application of the acetic acid. Forty SD rats were randomly divided into blank group (n = 8), control group (n = 8), FMD group (n = 8), CPA group (n = 8), and FMD+CPA group (n = 8). Each group was given intraperitoneally (i.p.) 0.5 mL/100 g distilled water, 9 g/L NaCl saline, 4 mg/kg FMD, 10 mg/kg CPA, 4 mg/kg FMD+10 mg/kg CPA, respectively, daily for 10 d. On d 10, ulcer area was determined by planimetry. The level of myeloperoxidase (MPO) in the liver homogenization was determined by biochemical methods and the plasma levels of 6-ketoprostaglandin F1 alpha (6-keto-PGF(1a)) and IL-8 were determined by radioimmunoassay.
  
  
  RESULTS
  The synergistic effects of FMD+CPA group on the lesion, IL-8, 6-keto-PGF(1a) and MPO were confirmed. The effect of FMD+CPA group was significantly different as compared to the control and FMD groups. The lesion (mm(2)) was reduced from 40.18+/-2.6 in control group to 6.83+/-2.97 in PMD+CPA group, P<0.01, and from 32.9+/-3.27 in FMD group to 6.83+/-2.97 in PMD+CPA group, P<0.01. The plasma levels of IL-8 decreased from 0.69+/-0.11 ng/L in control group to 0.4+/-0.04 ng/L in PMD+CPA group, P<0.01, and from 0.51+/-0.08 ng/L in FMD group to 0.4+/-0.04 ng/L in PMD+CPA group, P<0.05. The level of 6-keto-PGF(1a) increased from 7.55+/-1.65 ng/L in control group to 16.62+/-0.97 ng/L in PMD+CPA group, P<0.01, and from 13.15+/-1.48 ng/L in FMD group to 16.62+/-0.97 ng/L in PMD+CPA group, P<0.05. The levels of MPO in the liver homogenate decreased from 9.12+/-2.05 u/L in control group to 4.33+/-0.95 u/L in PMD+CPA group, P<0.01, and from 8.3+/-1.29 u/L in FMD group to 4.33+/-0.95 u/L, P<0.01.
  
  
  CONCLUSIONS
  The synergistic action of FMD and CPA on acetic acid-induced chronic gastric ulcer in rats decreases the incidence of ulcer and also enhances the healing of ulcer.
authors.affiliation: Laboratory of Natural Drugs of Medical College, China Three Gorges University, Yichang 443002, Hubei Province, China.
authors.forename: Zhen
authors.initials: Z
authors.lastname: Qin
authors.forename: Chao
authors.initials: C
authors.lastname: Chen
mesh_terms: D015121:6-Ketoprostaglandin F1 alpha / Q000097:blood; D019342:Acetic Acid / Q000633:toxicity; D000818:Animals; D002744:Chlorpheniramine / Q000008:administration & dosage*; D002908:Chronic Disease; D004357:Drug Synergism; D015738:Famotidine / Q000008:administration & dosage*; D006634:Histamine H1 Antagonists / Q000008:administration & dosage; D006635:Histamine H2 Antagonists / Q000008:administration & dosage; D016209:Interleukin-8 / Q000097:blood; D008099:Liver / Q000201:enzymology; D008297:Male; D009195:Peroxidase / Q000378:metabolism; D051381:Rats; D017207:Rats, Sprague-Dawley; D013276:Stomach Ulcer / Q000139:chemically induced / Q000188:drug therapy* / Q000473:pathology / Q000503:physiopathology
chemical_list: D006634:Histamine H1 Antagonists; D006635:Histamine H2 Antagonists; D016209:Interleukin-8; D002744:Chlorpheniramine; D015121:6-Ketoprostaglandin F1 alpha; D015738:Famotidine; D009195:Peroxidase; D019342:Acetic Acid