Abstract
Extracts were prepared from plasma of 12 subjects with normal serum gastrin concentration (less than 125 pg/ml), 5 normal subjects and 7 patients with duodenal ulcer and basal gastric acid hypersecretion (greater than 15 mEg/hr). Bioassays of plasma extracts were performed in anesthetized rats with perfused stomachs and acid out-puts were compared with those produced by normal saline and by 50 ng pentagastrin given in random order. Compared with saline, plasma extracts from 5 of 7 hypersecretor patients produced significant stimulation of acid secretion while none of the extracts from normal subjects produced acid stimulation. The stimulant identified in plasma from hypersecretor patients appears to be distinct from gastrin.
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