title: 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 RT2Profiler 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.affiliation: Schepens Eye Research Institute/Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, United States.
authors.forename: Marie A
authors.initials: MA
authors.lastname: Shatos
authors.affiliation: Schepens Eye Research Institute/Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, United States.
authors.forename: Robin R
authors.initials: RR
authors.lastname: Hodges
authors.affiliation: Schepens Eye Research Institute/Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, United States.
authors.forename: Masahiro
authors.initials: M
authors.lastname: Morinaga
authors.affiliation: Schepens Eye Research Institute/Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, United States.
authors.forename: David E
authors.initials: DE
authors.lastname: McNay
authors.affiliation: Schepens Eye Research Institute/Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, United States.
authors.forename: Rakibul
authors.initials: R
authors.lastname: Islam
authors.affiliation: Schepens Eye Research Institute/Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, United States.
authors.forename: Sumit
authors.initials: S
authors.lastname: Bhattacharya
authors.affiliation: Schepens Eye Research Institute/Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, United States.
authors.forename: Dayu
authors.initials: D
authors.lastname: Li
authors.affiliation: Department of Ophthalmology, Boston University School of Medicine, Boston, MA, United States.
authors.forename: Bruce
authors.initials: B
authors.lastname: Turpie
authors.affiliation: Department of Cell and Molecular Biology, The Scripps Research Institute, La Jolla, CA, United States.
authors.forename: Helen P
authors.initials: HP
authors.lastname: Makarenkova
authors.affiliation: Department of Ophthalmology, Boston University School of Medicine, Boston, MA, United States.
authors.forename: Sharmila
authors.initials: S
authors.lastname: Masli
authors.affiliation: Department of Medical Biochemistry, Oslo University Hospital, Oslo, Norway; Institute of Oral Biology, Faculty of Dentistry, University of Oslo, Oslo, Norway.
authors.forename: Tor P
authors.initials: TP
authors.lastname: Utheim
authors.affiliation: Schepens Eye Research Institute/Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, United States. Electronic address: darlene_dartt@meei.harvard.edu.
authors.forename: Darlene A
authors.initials: DA
authors.lastname: Dartt
mesh_terms: D000818:Animals; D015153:Blotting, Western; D016207:Cytokines / Q000378:metabolism*; D004247:DNA / Q000235:genetics*; D004195:Disease Models, Animal; D015352:Dry Eye Syndromes / Q000378:metabolism* / Q000473:pathology; D005260:Female; D005786:Gene Expression Regulation; D007150:Immunohistochemistry; D007765:Lacrimal Apparatus / Q000378:metabolism / Q000473:pathology*; D051379:Mice; D008810:Mice, Inbred C57BL; D060888:Real-Time Polymerase Chain Reaction; D013234:Stem Cells / Q000378:metabolism / Q000473:pathology*; D013666:Tears / Q000378:metabolism; D019700:Thrombospondin 1 / Q000096:biosynthesis / Q000235:genetics*; D014157:Transcription Factors / Q000096:biosynthesis / Q000235:genetics
chemical_list: D016207:Cytokines; D019700:Thrombospondin 1; D014157:Transcription Factors; D004247:DNA
keywords: Cytokines; Lacrimal gland; Myoepithelial cells; Progenitor cells; Sjogrens syndrome