Hankard GF, Matarazzo P, Duong JP, Mougenot JF, Navarro J, Cézard JP, Peuchmaur M. Increased TIA1-expressing intraepithelial lymphocytes in cow's milk protein intolerance.
J Pediatr Gastroenterol Nutr 1997;
25:79-83. [PMID:
9226532 DOI:
10.1097/00005176-199707000-00013]
[Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
BACKGROUND
Although a high level of intraepithelial lymphocytes (IELs) has been demonstrated in intestinal biopsies from children with cow's milk protein intolerance (CMPI), the properties of IELs in food-sensitive enteropathies remain unclear. In the present study, we analyzed the cytotoxic potential of IELs in CMPI, using a monoclonal antibody directed against the cytotoxic granule-associated protein TIA1.
METHODS
The study included 18 duodenal biopsies from 10 children previously diagnosed with CMPI and on a cow's milk-free diet of various duration. Six normal duodenal biopsies from children free of food intolerance served as controls. Immunostaining of formalin-fixed tissues was used to determine in the intraepithelial compartment (1) the number of TIA1-expressing cells per 100 epithelial cells, (2) the number of IELs per 100 epithelial cells, (3) the ratio of TIA1-expressing IELs (TIA1/IEL ratio).
RESULTS
In CMPI, the number of IELs and TIA1-positive cells, as well as the TIA1/IEL ratio was significantly increased compared with controls. Moreover, a negative correlation between the TIA1/IEL ratio and the duration of the diet was observed.
CONCLUSIONS
These results suggest that the recruitment of IELs with cytotoxic potential is increased in CMPI, and that IEL-mediated cytotoxicity could be involved in the pathogenesis of the disease.
Collapse