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Antigenic profile of the human lacrimal gland [see comments]

T Kivela

Department of Ophthalmology, Helsinki University Central Hospital, Finland.

The antigenic profile of 13 normal formalin-fixed, paraffin-embedded human main and accessory lacrimal glands, biopsied from patients aged 11 to 78 years, was studied using a panel of 27 polyclonal and monoclonal antibodies. Secretory cells of lacrimal acini reacted with antibodies to S-100 protein and simple epithelium-type cytokeratins CK 7, CK 8, CK 18, and CK 19. Their luminal membranes were labeled with antibodies to carcinoembryonic antigen, epithelial membrane antigen, and epithelial glycoproteins recognized by Ber-EP4. Myoepithelial cells were often immunopositive for S-100 protein, vimentin, glial fibrillary acidic protein (GFAP), and alpha-smooth muscle actin. More rarely, they reacted with antibodies recognizing CK 5, CK 13, and CK 14, which consistently labeled the basal cells of lacrimal ducts. Unlike myoepithelial cells, basal ductal cells were immunopositive for CK 7, CK 8, CK 18, and CK 19. In main excretory ducts, dendritic melanocyte- like cells co-expressing vimentin and S-100 protein intermingled with ductal epithelial cells. The luminal cells of lacrimal ducts basically paralleled secretory cells in their antigenic profile, although they lacked Ber-EP4 and were immunopositive for CK 4. Antibodies to neuron- specific enolase and synaptophysin reacted with nerve fibers among negatively reacting secretory acini. This antigenic profile closely parallels that of salivary glands and provides a basis for studies of lacrimal gland pathology.

Volume 40, Issue 5, pp. 629-642, 05/01/1992
Copyright © 1992 by The Histochemical Society


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