title: Methionine derivatives diminish sulphide damage to colonocytes--implications for ulcerative colitis.
abstract: BACKGROUND
  Bacterial production of anionic sulphide is increased in the colon of ulcerative colitis and sulphides can cause metabolic damage to colonocytes.
  
  
  OBJECTIVE
  To assess the reversal of the damaging effect of sulphide to isolated colonocytes by methionine and methionine derivatives.
  
  
  METHODS
  Isolated colonocytes were prepared from rat colons and 12 human colectomy specimens. In cell suspensions 14CO2/acetoacetate generation was measured from [1-14C]-butyrate (5.0 mmol/l) in the presence of 0-2.0 mmol/l sodium hydrogen sulphide. The effect of 5.0 mmol/l L-methionine, S-adenosylmethionine 1,4 butane disulphonate and DL-methionine-S-methylsulphonium chloride on sulphide inhibited oxidation was observed.
  
  
  RESULTS
  In rat colonocytes sodium hydrogen sulphide dose dependently reduced oxidative metabolite formation from n-butyrate, an action reversed in order of efficacy by S-adenosylmethionine 1,4 butane disulphonate > DLmethionine-S-methyl-sulphonium chloride > L-methionine. In human colonocytes S-adenosylmethionine 1,4 butane disulphonate most significantly improved 14CO2 production (p = < 0.005) suppressed by sodium hydrogen sulphide.
  
  
  CONCLUSIONS
  Sulphide toxicity in colonocytes is reversible by methyl donors. The efficiency of sulphide detoxification may be an important factor in the pathogenesis and treatment of ulcerative colitis for which S-adenosylmethionine 1,4 butane disulphonate may be of therapeutic value.
authors.affiliation: Department of Surgery and University of Adelaide, Australia.
authors.forename: W E
authors.initials: WE
authors.lastname: Roediger
authors.forename: W
authors.initials: W
authors.lastname: Babidge
authors.forename: S
authors.initials: S
authors.lastname: Millard
mesh_terms: D000081:Acetamides / Q000032:analysis; D000818:Animals; D002087:Butyrates / Q000378:metabolism*; D020148:Butyric Acid; D002245:Carbon Dioxide / Q000378:metabolism; D002250:Carbon Radioisotopes / Q000378:metabolism; D002478:Cells, Cultured; D003093:Colitis, Ulcerative / Q000378:metabolism; D003106:Colon / Q000187:drug effects / Q000378:metabolism*; D006801:Humans; D008297:Male; D008715:Methionine / Q000494:pharmacology*; D051381:Rats; D017207:Rats, Sprague-Dawley; D012436:S-Adenosylmethionine / Q000031:analogs & derivatives / Q000494:pharmacology*; D012588:Scintillation Counting; D013440:Sulfides / Q000494:pharmacology; D014814:Vitamin U / Q000494:pharmacology*
chemical_list: D000081:Acetamides; D002087:Butyrates; D002250:Carbon Radioisotopes; D013440:Sulfides; D020148:Butyric Acid; D002245:Carbon Dioxide; D014814:Vitamin U; D012436:S-Adenosylmethionine; D008715:Methionine