Depletion of alveolar glycogen corresponds with immunohistochemical development of CD208 antigen expression in perinatal lamb lung

Date
2006-11-01
Authors
Ackermann, Mark
Meyerholz, David
DeGraaf, James
Gallup, Jack
Gallup, Jack
Olivier, Alicia
Ackermann, Mark
Major Professor
Advisor
Committee Member
Journal Title
Journal ISSN
Volume Title
Publisher
Altmetrics
Authors
Research Projects
Organizational Units
Veterinary Pathology
Organizational Unit
Journal Issue
Series
Department
Veterinary Pathology
Abstract

CD208 DC lysosomal-associated protein is a marker of activated human dendritic cells; however, recently it was described as a marker of adult type II pneumocytes in many species including humans and sheep. Our hypothesis was that CD208 is developmentally regulated in lung pneumocytes. Lamb lungs at varying stages of development were stained immunohistochemically for CD208 and with Nile red (a fluorescent stain for lamellar bodies of type II cells) along with pulmonary markers of maturation (glycogen stores and surfactant protein A [SP-A] expression) or proliferation (Ki-67). CD208 staining and Nile red were localized to rare pneumocytes in young fetal lambs (day 115), increasing in frequency and stain intensity with age. Periodic acid-Schiff staining of glycogen granules was most prominent in the young lambs (day 115) with reduced staining through advancing lung development. SP-A was detected in pulmonary epithelia and staining in alveoli increased through gestation with decreased staining at 2 weeks of age. Intranuclear Ki-67 staining decreased through late gestation but was increased in 2-week-old lambs. Ontogeny of CD208 staining and depletion of glycogen were correlated (p<0.0001) and consistent with the premise that CD208 is localized to developing lamellar bodies. The findings suggest that CD208 antigen expression may serve as a marker for pneumocyte maturation in the developing fetal lung.

Comments

The final, definitive versin of this paper has been published in Journal of Histochemistry and Cytochemistry, 54/11, 11/2006 by SAGE Publications Ltd, All rights reserved, © The Histochemical Society, Inc.

Description
Keywords
Citation
DOI
Collections