Polymeric immunoglobulin receptor (pIgR) mRNA expression in pig gastric mucosa.

<div><p>PIgR mRNA expression was determined in the mucosa at three gastric sites in piglets during the suckling period (14, 21 and 28 days of age) and after weaning (42 days of age). </p> <p>In cardiac-to-oxyntic mucosa, pIgR expression increased linearly during suckling (P=0.019) and also increased post-weaning (P=0.001). In pyloric mucosa, pIgR expression increased post-weaning (P=0.049). In oxyntic mucosa, pIgR expression increased linearly during suckling (P=0.036). For the three gastric sites, no significant quadratic effect during suckling was detected (<i>P</i>>0.05).</p>