adherens junctions — within the apical junctional region of the Drosophila embryonic epithelium; this may provide mechanical stability during the junctional remodeling that accompanies tissue morphogenesis. Too much or too little ERM-mediated crosslinking impairs the migration of mesendoderm cells during zebrafish gastrulation and homing lymphocytes in mice. This is due in part to the cells’ in...

A progressive failure in phagocytosis by the retinal pigment epithelium (RPE) occurs in the Royal College of Surgeons rat with inherited retinal degeneration. Another change that can be attributed to a defect in the RPE is a breakdown in the blood-retinal barrier. RPE cell junctions, which form a part of this barrier, become permeable to extracellular tracer during the dystrophic process. We ha...

1Laboratory for the Study of Calcified Tissues and Biomaterials, Department of Stomatology, Faculty of Dentistry, Université de Montréal, P.O. Box 6128, Station Centre-Ville, H3C1J4, Montréal, Québec, Canada 2Shriners Hospital for Children, Montréal, Québec, Canada C. Nishio1, R. Wazen1, S. Kuroda1, P. Moffatt2, A. Nanci1 P44-EXPRESSION PATTERN of APIN and AMELOTIN DURING FORMATION and REGENERA...

BACKGROUND This study aims to observe the morphological characteristics and identify the function characteristics of junctional epithelium (JE) tissues and cultured JE cells. METHODS Paraffin sections of human molar or premolar on the gingival buccolingual side were prepared from 6 subjects. HE staining and image analysis were performed to measure and compare the morphological difference amon...

OBJECTIVE Non-human primates, dogs, rats, hamsters and ferrets, have frequently been used as laboratory animals in periodontal biology and pathology. In the past, mice have been used less for this purpose, but nowadays attract a lot of interest because gene knockout and transgenic technologies utilize mice primarily. In this study, we investigate the effects of ovariectomy and aging on tooth at...

BACKGROUND & AIMS Small intestinal mucosal ultrastructural abnormalities were reported in a limited number of patients with cholera in the 1970s. This study extends these observations by examining distal duodenal biopsy samples from 19 patients with cholera and 10 controls. METHODS Endoscopic biopsy samples obtained, usually during the first 24 hours of illness, were processed for electron mi...