Naess B, Westbye O, Hildrum KI, Nafstad I. The effects of peptide-precipitating lignosulphonic acids on the proteolytic activity of pepsin in vitro and on the response of pigs to an ulcer inducing diet.
Acta Vet Scand 1973;
14:44-56. [PMID:
4580955 PMCID:
PMC8559855]
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Abstract
The inhibitory effect of peptide-precipitating lignosulphonic acids on the proteolytic activity of pepsin in vitro has been studied. When an unfractionated lignosulphonic acid preparation was used, total inhibition of the activity of 5 µg crystalline pepsin was obtained by addition of about 15 mg of lignosulphonic acids.
The greatest inhibitory effect was seen with the high-molecular weight lignosulphonic acids, but an effect was also seen with middle-and low-molecular weight lignosulphonic acids.
A reduction in the inhibitory effect was seen when the experiments were performed in the presence of arginine. The inhibition mechanism is discussed in relation to the peptide-precipitating ability of the lignosulphonic acids.
No obvious protection against the appearance of stomach ulcers in four pigs receiving an ulcerogenic diet was seen.
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