CD45 in ocular tissues during larval and juvenile stages and early stages of V. anguillarum infection in young lumpfish (Cyclopterus lumpus). Issue 128 (September 2022)

• Record Type: Journal Article
• Authors: Gendron, Robert L.; Hyde, Tatiana; Paradis, Hélène; Cao, Trung; Machimbirike, Vimbai I.; Segovia, Cristopher; Vasquez, Ignacio; Ghasemieshkaftaki, Maryam; Scapigliati, Giuseppe; Boyce, Danny; Santander, Javier
• Is Part Of: Fish & shellfish immunology. Issue 128(2022)
• Page Start: 523
• Page End: 535
• Publication Date: 2022-09
• Subjects: Fishes -- Immunology -- Periodicals; Shellfish -- Immunology -- Periodicals; Poissons -- Immunologie -- Périodiques; Crustacés -- Immunologie -- Périodiques; 571.9617
• DOI: 10.1016/j.fsi.2022.08.023
• Languages: English
• ISSNs: 1050-4648

Abstract

Abstract: Immune responses to infectious diseases impacting lumpfish ( Cyclopterus lumpus ) eye tissue are only starting to be studied at a molecular and histopathological level. In this study, we extend our understanding of lumpfish sensory organ anatomy, of components of the lumpfish nasal and ocular immune system and the nature of the intraocular response to Vibrio anguillarum infection. We have evaluated the expression of cluster of differentiation (CD) 45 protein, a tyrosine phosphatase, in larval and juvenile lumpfish tissues in order to spatially survey ocular and related head structures that may participate in early stages of intraocular immune responses. We provide here a histological mapping of the larval lumpfish nasal chamber system since its connectively with the eye though mucosal epithelia have not been explored. These results build upon our growing understanding of the lumpfish intraocular immune response to pathogens, exemplified herein by experimental nasally delivered V. anguillarum infection. CD45 is developmentally regulated in lumpfish eyes and periocular anatomy with early expression appearing in larvae in corneal epithelium and in nasal structures adjacent to the eye. Normal juvenile and adult lumpfish eyes express CD45 in the corneal epithelium, in leukocyte cells within blood vessel lumens of the rete mirabile, choroid body and choriocapillaris vasculatures. Experimental nasally delivered V. anguillarum infection led to qualitative and quantitative changes in CD45 expression in head kidney renal tubule tissues by 7 days post infection (dpi). The same animals showed redistribution and upregulation of corneal epithelial CD45 expression, corneal epithelial dysplasia and an increased frequency of CD45 + cells in ocular vasculature. Interestingly, while CD45 upregulation and/or CD45 + cell infiltration into inner ocular and retinal tissues was not observed under this experimental scenario, subtle neural retinal changes were observed in infected fish. This work provides new fundamental knowledge on North Atlantic teleost visual systems and vision biology in general. Highlights: CD45 is expressed in specific structures of eyes and periocular tissues of lumpfish. Nasal administered V. anguillarum alters ocular CD45 expression patterns. Nasal administered V. anguillarum alters head kidney CD45 expression patterns. Despite being in different fish clusters, lumpfish and European sea bass share similarities in CD45 R0 and ABC domains. The lumpfish nasal chamber system is complex and contains extensive olfactory mucosae.