[STRUCTURAL FORM OF THE FOLLICLE-ASSOCIATED EPITHELIUM OF PEYERS' PATCHES OF THE ALBINO RATS' SMALL INTESTINE]

Area of Science:

• Histology
• Immunology
• Gastroenterology

Background:

• The Peyer's patches are crucial components of the gut-associated lymphoid tissue (GALT).
• Understanding the intricate microscopic structure of the intestinal epithelium and its association with lymphoid nodules is vital for comprehending gut immunity.

Purpose of the Study:

• To provide a detailed microscopic specification of the intestinal epithelium associated with lymphoid nodules in rat Peyer's patches.
• To identify and characterize novel structural associations between the intestinal epithelium and lymphoid tissue.

Main Methods:

• Histological analysis of serial paraffin sections from the small intestine of 30 albino male rats.
• Microscopic examination using a light microscope ('Konus').
• Morphometric analysis of tissue structures using an object-micrometer (Sigeta X 1 mm/100 Div.x0.01mm).

Main Results:

• Discovery of a previously undescribed form of association between the intestinal epithelium and lymphoid nodules, termed 'column-inline lymphoepithelial fractals'.
• Identification of wide intercellular fissures separating limbic enterocytes and underlying columns of lymphocytic elements within these fractals.

Conclusions:

• The study reveals a novel structural organization within the Peyer's patches, characterized by column-inline lymphoepithelial fractals.
• The presence of significant intercellular fissures suggests a unique pathway for interaction between the intestinal epithelium and the immune cells of Peyer's patches.