1985
DOI: 10.1159/000309491
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Light and Electron Microscopical Study of the Conjunctiva in Sicca Syndrome

Abstract: Conjunctival biopsies of 11 patients with sicca syndrome were studied under light and transmission electron microscopy. The notable findings were vasculitis of the conjunctival vessels. There were severe changes in the microvilli, namely a loss of microvilli and decrease in their height, measuring approximately 1,000–2,000 A, in comparison with microvilli of the control conjunctiva, measuring 4,000 Å in height. There was no branching yet or fusion of microvilli.

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Cited by 12 publications
(4 citation statements)
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“…In fact, either in normal [1,7,8,14] or in pathological [10,20] human eyes or in animal species, such as the dog [11] and the rabbit [10], a uniform layer of microvilli or a double population of microvilli and microplicae were described on the conjunctival surface. As conflicting results on the presence of microvilli and microplicae are also reported regarding the corneal surface [12], we demonstrated that in the Mongolian gerbil conjunctiva only microplicae were detectable: as to their role, they could provide a better adhesion of mucin to the epithelium [3].…”
Section: Discussionmentioning
confidence: 42%
“…In fact, either in normal [1,7,8,14] or in pathological [10,20] human eyes or in animal species, such as the dog [11] and the rabbit [10], a uniform layer of microvilli or a double population of microvilli and microplicae were described on the conjunctival surface. As conflicting results on the presence of microvilli and microplicae are also reported regarding the corneal surface [12], we demonstrated that in the Mongolian gerbil conjunctiva only microplicae were detectable: as to their role, they could provide a better adhesion of mucin to the epithelium [3].…”
Section: Discussionmentioning
confidence: 42%
“…Given that the conjunctiva and lacrimal gland ductules exhibit an inflammatory infiltrate on histopathology [6,28,29], it bears at least some consideration to use systemic immunosuppression to prevent inflammatory changes in the lacrimal gland and conjunctiva, thereby preserving function of the exocrine glands they contain. Turning to intraocular inflammation (uveitis) where such an approach is standard may serve as a potential model for an approach to some types of keratoconjunctivitis sicca, particularly in Sjögren's syndrome [17].…”
Section: Systemic Immunomodulatory and Biologic Therapymentioning
confidence: 99%
“…Enquanto as pesquisas em humanos demonstraram as alterações do olho seco na superfície ocular de um modo abrangente (16)(17)(18) , estudos recentes em modelos pré-clínicos de ceratoconjuntivite "sicca" permitiram que pudéssemos delinear sua história natural em quatro eventos-chave: inicialmente, a redução na produção lacrimal ou o aumento em sua evaporação se associa a uma hiperosmolaridade lacrimal, elevando o teor de sódio e de outros eletrólitos na lágrima. Nesta fase inicial, o olho seco só pode ser detectado pela história clínica e por uma medida da osmolaridade lacrimal.…”
Section: História Natural Dos Achados Em Olho Secounclassified