Alteration in cellular turnover and progenitor cell population in lacrimal glands from thrombospondin 1-/- mice, a model of dry eye.

Abstract

The purpose of this study was to investigate the changes that occur in the lacrimal glands (LGs) in female thrombospondin 1 knockout (TSP1-/-) mice, a mouse model of the autoimmune disease Sjogren's syndrome. The LGs of 4, 12, and 24 week-old female TSP1-/- and C57BL/6J (wild type, WT) mice were used. qPCR was performed to measure cytokine expression. To study the architecture, LG sections were stained with hematoxylin and eosin. Cell proliferation was measured using bromo-deoxyuridine and immunohistochemistry. Amount of CD47 and stem cell markers was analyzed by western blot analysis and location by immunofluorescence microscopy. Expression of stem cell transcription factors was performed using Mouse Stem Cell Transcription Factors RT2 Profiler PCR Array. Cytokine levels significantly increased in LGs of 24 week-old TSP1-/- mice while morphological changes were detected at 12 weeks. Proliferation was decreased in 12 week-old TSP1-/- mice. Three transcription factors were overexpressed and eleven underexpressed in TSP1-/- compared to WT LGs. The amount of CD47, Musashi1, and Sox2 was decreased while the amount of ABCG2 was increased in 12 week-old TSP1-/- mice. We conclude that TSP1 is necessary for maintaining normal LG homeostasis. Absence of TSP1 alters cytokine levels and stem cell transcription factors, LG cellular architecture, decreases cell proliferation, and alters amount of stem cell markers.

• Authors: Marie A Shatos, Robin R Hodges, Masahiro Morinaga, David E McNay, Rakibul Islam, Sumit Bhattacharya, Dayu Li, Bruce Turpie, Helen P Makarenkova, Sharmila Masli, Tor P Utheim, Darlene A Dartt
• Journal: Experimental eye research (Exp Eye Res) Vol. 153 Pg. 27-41 (Dec 2016) ISSN: 1096-0007 [Electronic] England
• PMID: 27697548 (Publication Type: Journal Article)
• Copyright: Copyright © 2016 Elsevier Ltd. All rights reserved.

Chemical References

• Cytokines
• Thrombospondin 1
• Transcription Factors
• DNA

Topics

• Animals
• Blotting, Western
• Cytokines (metabolism)
• DNA (genetics)
• Disease Models, Animal
• Dry Eye Syndromes (metabolism, pathology)
• Female
• Gene Expression Regulation
• Immunohistochemistry
• Lacrimal Apparatus (metabolism, pathology)
• Mice
• Mice, Inbred C57BL
• Real-Time Polymerase Chain Reaction
• Stem Cells (metabolism, pathology)
• Tears (metabolism)
• Thrombospondin 1 (biosynthesis, genetics)
• Transcription Factors (biosynthesis, genetics)