Summary
PATIENTS with the irritable bowel syndrome (IBS) had the same fasting and post prandial plasma immunoreactive substance P (ISP) levels as age and sex matched controls. It seems unlikely therefore that changes in plasma ISP have a role in the pathogenesis of IBS or that plasma ISP levels aid in its diagnosis.
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McAllister, C., Corbally, N. & Fielding, J.F. Plasma substance P in the irritable bowel syndrome. I.J.M.S. 154, 431–432 (1985). https://doi.org/10.1007/BF02937218
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DOI: https://doi.org/10.1007/BF02937218