title: Replacing the acetyl linkage in aspirin with choline and magnesium moieties reduces the occurrence of gastric mucosal injury.
abstract: The acetyl moiety in aspirin (acetyl salicylic acid: ASA) is considered to play a major part in the pathogenesis of ASA-induced mucosal injury. At equivalent salicylate doses and pH values, the induction of acute gastric mucosal haemorrhagic erosions in rats by ASA and choline magnesium trisalicylate (CMT), a new non-acetylated salicylate, with and without the potentiating damaging effect of taurodeoxycholic acid (TDCA) were compared. Test solutions were administered by per oral intubation to five groups of fasting Sprague-Dawley rats (n = 24). Gastric mucosa were examined after 4 hours and mucosal injury assessed by a lesion-scoring system. The incidence and severity (median lesion scores with quartiles) of the lesions were 83% and 13 (7:20) respectively for ASA (128 mg kg-1) compared with 17% and 0 (0:0) for CMT (128 mg kg-1) (P less than 0.001 and P less than 0.001). TDCA increased mucosal damage to 100% and 29 (20:34) for ASA compared with 30% and 0 (0:4) for CMT (P less than 0.001) and P less than 0.001). Serum salicylate levels (median values of 1.4 for ASA and 1.5 mmol litre-1 for CMT) were not significantly different. It is concluded that replacing the acetyl moiety in ASA with choline and magnesium moieties reduces the ASA-induced mucosal injury, without affecting blood salicylate concentrations.
authors.affiliation: Gastroenterology Unit, Royal Infirmary, Glasgow.
authors.forename: B J
authors.initials: BJ
authors.lastname: Danesh
authors.forename: L M
authors.initials: LM
authors.lastname: Nelson
authors.forename: R I
authors.initials: RI
authors.lastname: Russell
authors.forename: C
authors.initials: C
authors.lastname: Docherty
mesh_terms: D000818:Animals; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000009:adverse effects* / Q000737:chemistry; D002794:Choline / Q000009:adverse effects / Q000031:analogs & derivatives* / Q000737:chemistry; D005753:Gastric Mucosa / Q000187:drug effects*; D008297:Male; D051381:Rats; D011919:Rats, Inbred Strains; D012459:Salicylates / Q000009:adverse effects* / Q000737:chemistry; D013276:Stomach Ulcer / Q000139:chemically induced* / Q000473:pathology
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal; D012459:Salicylates; C017959:choline magnesium trisalicylate; D002794:Choline