PMID- 30332778 OWN - NLM STAT- MEDLINE DCOM- 20190121 LR - 20190121 IS - 1422-0067 (Electronic) IS - 1422-0067 (Linking) VI - 19 IP - 10 DP - 2018 Oct 16 TI - Thrombospondin-1 Is Necessary for the Development and Repair of Corneal Nerves. LID - 10.3390/ijms19103191 [doi] LID - 3191 AB - Thrombospondin-1-deficient (TSP-1(-/-)) mice are used as an animal model of Sjogren's Syndrome because they exhibit many of the symptoms associated with the autoimmune type of dry eye found in primary Sjogren's Syndrome. This type of dry eye is linked to the inflammation of the lacrimal gland, conjunctiva, and cornea, and is thought to involve dysfunction of the complex neuronal reflex arc that mediates tear production in response to noxious stimuli on the ocular surface. This study characterizes the structural and functional changes to the corneal nerves that are the afferent arm of this arc in young and older TSP-1(-/-) and wild type (WT) mice. The structure and subtype of nerves were characterized by immunohistochemistry, in vivo confocal microscopy, and confocal microscopy. Cytokine expression analysis was determined by Q-PCR and the number of monocytes was measured by immunohistochemistry. We found that only the pro-inflammatory cytokine MIP-2 increased in young corneas of TSP-1(-/-) compared to WT mice, but tumor necrosis factor-alpha (TNF-alpha), monocyte chemoattractant protein-1 (MCP-1), and macrophage inflammatory protein-2 (MIP-2) all increased in older TSP-1(-/-) mouse corneas. In contrast, CD11b+ pro-inflammatory monocytes did not increase even in older mouse corneas. Calcitonin gene-related peptide (CGRP)-, but not Substance P (SubP)-containing corneal nerves decreased in older, but not younger TSP-1(-/-) compared to WT mouse corneas. We conclude that CGRP-containing corneal sensory nerves exhibit distinct structural deficiencies as disease progresses in TSP-1(-/-) mice, suggesting that: (1) TSP-1 is needed for the development or repair of these nerves and (2) impaired afferent corneal nerve structure and hence function may contribute to ocular surface dysfunction that develops as TSP-1(-/-) mice age. FAU - Tatematsu, Yukako AU - Tatematsu Y AD - Schepens Eye Research Institute/Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, MA 02114, USA. yuka.tatematsu@gmail.com. FAU - Khan, Qalbi AU - Khan Q AD - Schepens Eye Research Institute/Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, MA 02114, USA. Qalbi.khan@uit.no. AD - Department of Medical Biology, Faculty of Health Sciences, University of Tromso, Tromso 9037, Norway. Qalbi.khan@uit.no. FAU - Blanco, Tomas AU - Blanco T AD - Schepens Eye Research Institute/Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, MA 02114, USA. tomas_blanco@meei.harvard.edu. FAU - Bair, Jeffrey A AU - Bair JA AD - Schepens Eye Research Institute/Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, MA 02114, USA. Jeffrey_Bair@meei.harvard.edu. FAU - Hodges, Robin R AU - Hodges RR AD - Schepens Eye Research Institute/Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, MA 02114, USA. robin_hodges@meei.harvard.edu. FAU - Masli, Sharmila AU - Masli S AD - Department of Ophthalmology, Boston University School of Medicine, Boston, MA 02118, USA. smasli@bu.edu. FAU - Dartt, Darlene A AU - Dartt DA AD - Schepens Eye Research Institute/Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, MA 02114, USA. darlene_dartt@meei.harvard.edu. LA - eng GR - EY6177/GF/NIH HHS/United States PT - Journal Article DEP - 20181016 PL - Switzerland TA - Int J Mol Sci JT - International journal of molecular sciences JID - 101092791 RN - 0 (Ccl2 protein, mouse) RN - 0 (Chemokine CCL2) RN - 0 (Chemokine CXCL2) RN - 0 (Cxcl2 protein, mouse) RN - 0 (Thrombospondin 1) RN - 0 (Tumor Necrosis Factor-alpha) RN - 33507-63-0 (Substance P) RN - JHB2QIZ69Z (Calcitonin Gene-Related Peptide) SB - IM MH - Animals MH - Calcitonin Gene-Related Peptide/metabolism MH - Cell Count MH - Chemokine CCL2/metabolism MH - Chemokine CXCL2/metabolism MH - Cornea/*innervation/metabolism/*pathology MH - Corneal Stroma/pathology MH - Epithelium, Corneal/pathology MH - Mice MH - Monocytes/metabolism MH - *Nerve Regeneration MH - Staining and Labeling MH - Substance P/metabolism MH - Thrombospondin 1/*metabolism MH - Tumor Necrosis Factor-alpha/metabolism PMC - PMC6214039 OTO - NOTNLM OT - CGRP OT - Substance P OT - cornea OT - dry eye OT - sensory nerves OT - thrombospondin-1 COIS- The authors have no conflict of interest. EDAT- 2018/10/20 06:00 MHDA- 2019/01/22 06:00 PMCR- 2018/10/01 CRDT- 2018/10/19 06:00 PHST- 2018/08/31 00:00 [received] PHST- 2018/10/09 00:00 [revised] PHST- 2018/10/10 00:00 [accepted] PHST- 2018/10/19 06:00 [entrez] PHST- 2018/10/20 06:00 [pubmed] PHST- 2019/01/22 06:00 [medline] PHST- 2018/10/01 00:00 [pmc-release] AID - ijms19103191 [pii] AID - ijms-19-03191 [pii] AID - 10.3390/ijms19103191 [doi] PST - epublish SO - Int J Mol Sci. 2018 Oct 16;19(10):3191. doi: 10.3390/ijms19103191.