Morphological features of the lymphoepithelial structures of the jejunum after the stress in rats

We studied the effect of acute emotional stress on functional status of lymphoid epithelial structures of the jejunum in rats with different behavioral activity. Morphological and functional characteristics of lymphoid tissue were assessed using morphometric, histological and electron microscopic methods. In behaviorally active and passive rats, reduction in villus height, area of the epithelium and lymphoid tissue of the jejunum was recorded on the third day after acute emotional impact. At that, the largest number of destructively modified lymphoid cells was identified by comparison with the other time points. Moreover, destruction of the apical part of the jejunal villi was observed on days 3 and 7 after stress exposure. Recovery of the lymphoepithelial structures of the jejunum after acute stress exposure was detected on day 14.