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Sökning: WFRF:(Salaspuro M)

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  • Alling, C, et al. (författare)
  • Revealing alcohol abuse: to ask or to test?
  • 2005
  • Ingår i: Alcoholism, clinical and experimental research. - : Wiley. - 0145-6008. ; 29:7, s. 1257-1263
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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4.
  • Alling, Christer, et al. (författare)
  • Revealing alcohol abuse: to ask or to test?
  • 2005
  • Ingår i: Alcoholism: Clinical and Experimental Research. - 0145-6008. ; 29:7, s. 1257-1263
  • Tidskriftsartikel (refereegranskat)
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5.
  • Hellström, Per M., et al. (författare)
  • Slow-release L-cysteine capsule prevents gastric mucosa exposure to carcinogenic acetaldehyde : results of a randomised single-blinded, cross-over study of Helicobacter-associated atrophic gastritis
  • 2017
  • Ingår i: Scandinavian Journal of Gastroenterology. - : Informa UK Limited. - 0036-5521 .- 1502-7708. ; 52:2, s. 230-237
  • Tidskriftsartikel (refereegranskat)abstract
    • Introduction: Helicobacter-induced atrophic gastritis with a hypochlorhydric milieu is a risk factor for gastric cancer. Microbes colonising acid-free stomach oxidise ethanol to acetaldehyde, a recognised group 1 carcinogen. Objective: To assess gastric production of acetaldehyde and its inert condensation product, non-toxic 2-methyl-1,3-thiazolidine-4-carboxylic acid (MTCA), after alcohol intake under treatment with slow-release L-cysteine or placebo. Methods: Seven patients with biopsy-confirmed atrophic gastritis, low serum pepsinogen and high gastrin-17 were studied in a cross-over single-blinded design. On separate days, patients randomly received 200 mg slow-release L-cysteine or placebo with intragastric instillation of 15% (0.3 g/kg) ethanol. After intake, gastric concentrations of ethanol, acetaldehyde, L-cysteine and MTCA were analysed. Results: Administration of L-cysteine increased MTCA (p < .0004) and decreased gastric acetaldehyde concentrations by 68% (p < .0001). The peak L-cysteine level was 7552 +/- 2687 mu mol/L at 40 min and peak MTCA level 196 +/- 98 mu mol/L at 80 min after intake. Gastric L-cysteine and MTCA concentrations were maintained for 3 h. The AUC for MTCA was 11-fold higher than acetaldehyde, indicating gastric first-pass metabolism of ethanol. With placebo, acetaldehyde remained elevated also at low ethanol concentrations representing 'non-alcoholic' beverages and food items. Conclusions: After gastric ethanol instillation, slow-release L-cysteine eliminates acetaldehyde to form inactive MTCA, which remains in gastric juice for up to 3 h. High acetaldehyde levels indicate a marked gastric first-pass metabolism of ethanol resulting in gastric accumulation of carcinogenic acetaldehyde. Local exposure of the gastric mucosa to acetaldehyde can be mitigated by slow-release L-cysteine capsules.
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