Abstract

The endocrine and exocrine activity of guinea pig stomach was measured by the determination of pepsinogen in gastric tissue and in plasma. Gastric juice pepsin was also studied.A significant increase of both pepsinogen and pepsin was found in animals treated with a dose of histamine (75 mg. per kg. of body weight). These results give further evidence that the zymogenic cells of gastric mucosa may be stimulated by histamine. The determination of pepsinogen in gastric tissue seems to permit a direct approach to the enzymatic function of zymogenic cells.

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