Journal
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
Volume 22, Issue 14, Pages -Publisher
MDPI
DOI: 10.3390/ijms22147293
Keywords
retina; small leucine rich proteoglycans (SLRP); biglycan; decorin; fibromodulin; lumican; PRELP; opticin; osteoglycin; mimecan; chondroadherin; tsukushi; nyctalopin
Funding
- National Eye Institute, NIH, Bethesda, Maryland [RO1EY029795]
- Research Facilities Improvement Program from the National Center for Research Resources, NIH [C06RR016511]
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Small leucine-rich proteoglycans (SLRPs) serve a crucial role in maintaining retinal homeostasis by participating in the organization of extracellular matrix, regulation of cell growth, and cell-matrix interactions in several upstream signaling pathways.
Retinal diseases such as age-related macular degeneration (AMD), retinopathy of prematurity (ROP), and diabetic retinopathy (DR) are the leading causes of visual impairment worldwide. There is a critical need to understand the structural and cellular components that play a vital role in the pathophysiology of retinal diseases. One potential component is the family of structural proteins called small leucine-rich proteoglycans (SLRPs). SLRPs are crucial in many fundamental biological processes involved in the maintenance of retinal homeostasis. They are present within the extracellular matrix (ECM) of connective and vascular tissues and contribute to tissue organization and modulation of cell growth. They play a vital role in cell-matrix interactions in many upstream signaling pathways involved in fibrillogenesis and angiogenesis. In this comprehensive review, we describe the expression patterns and function of SLRPs in the retina, including Biglycan and Decorin from class I; Fibromodulin, Lumican, and a Proline/arginine-rich end leucine-rich repeat protein (PRELP) from class II; Opticin and Osteoglycin/Mimecan from class III; and Chondroadherin (CHAD), Tsukushi and Nyctalopin from class IV.
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