title: Small leucine-rich repeat proteoglycans in corneal inflammation and wound healing.
abstract: The small leucine rich repeat proteoglycans are major components of the cornea. Lumican, keratocan, decorin, biglycan and osteoglycin are present throughout the adult corneal stroma, and fibromodulin in the peripheral limbal area. In the cornea literature these proteoglycan have been reviewed as structural, collagen fibril-regulating proteins of the cornea. However, these proteoglycans are members of the leucine-rich-repeat superfamily, and share structural similarities with pathogen recognition toll-like receptors. Emerging studies are showing that these have a range of interactions with cell surface receptors, chemokines, growth factors and pathogen associated molecular patterns and are able to regulate host immune response, inflammation and wound healing. This review discusses what is known about their innate immune-related role directly in the cornea, and studies outside the field that find interesting links with innate immune and wound healing responses that are likely to be relevant to the ocular surface. In addition, the review discusses phenotypes of mice with targeted deletion of proteoglycan genes and genetic variants associated with human pathologies.
authors: Department of Medicine, Johns Hopkins School of Medicine, Baltimore, USA.
authors: Jihane
authors: J
authors: Frikeche
authors: Department of Medicine, Johns Hopkins School of Medicine, Baltimore, USA.
authors: George
authors: G
authors: Maiti
authors: Department of Medicine, Johns Hopkins School of Medicine, Baltimore, USA; Department of Cell Biology, Johns Hopkins School of Medicine, Baltimore, USA; Department of Ophthalmology, Johns Hopkins School of Medicine, Baltimore, USA. Electronic address: schakra1@jhmi.edu.
authors: Shukti
authors: S
authors: Chakravarti
mesh_terms: D000818:Animals; D003315:Cornea / Q000378:metabolism* / Q000473:pathology; D065306:Corneal Injuries / Q000378:metabolism* / Q000473:pathology; D006801:Humans; D007634:Keratitis / Q000378:metabolism* / Q000473:pathology; D000071232:Small Leucine-Rich Proteoglycans / Q000378:metabolism*; D014945:Wound Healing / Q000502:physiology*
chemical_list: D000071232:Small Leucine-Rich Proteoglycans
keywords: Biglycan; Cornea wound healing; Decorin; Fibromodulin; Keratocan; Lumican; Osteoglycin; SLRP; TLR