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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Treatment with galectin-1 eye drops regulates mast cell degranulation and attenuates the severity of conjunctivitis

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Mello-Bosnic, Claudia [1] ; Gimenes, Alexandre Dantas [2] ; Oliani, Sonia Maria [1] ; Gil, Cristiane Damas [1, 2]
Total Authors: 4
[1] UNESP Univ Estadual Paulista, Programa Posgrad Biociencias, Inst Biociencias Letras & Ciencias Exatas, Sao Jose Do Rio Preto, SP - Brazil
[2] UNIFESP Univ Fed Sao Paulo, Dept Morfol & Genet, Rua Botucatu 740, Ed Lemos Torres 3 Andar, BR-04023900 Sao Paulo, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: European Journal of Pharmacology; v. 833, p. 124-130, AUG 15 2018.
Web of Science Citations: 1

Galectin-1 (Gal-1) is a beta-galactoside-binding protein with diverse biological activities in the pathogenesis of inflammation, however the mechanisms by which Gal-1 modulates cellular responses in allergic inflammatory processes have not been fully determined. In this study, we evaluated the therapeutic potential of Gal-1 eye drops in an experimental model of conjunctivitis. Wistar rats received a topical application of compound (C)48/80 (100 mg/ml) into right eyes and a drop of vehicle into the contralateral eye. Another group of rats received Gal-1 (0.3 or 3 mu g/eye) or sodium cromoglycate (SCG; 40 mg/ml) in both eyes and, after 15 min, right eye was challenged with C48/80. Conjunctivitis-induced by C48/80 was characterized by severe eyelid oedema and tearing, but clinical signs were ameliorated by eye drop doses of both Gal-1 (0.3/3 mu g) and SCG. As expected, an increased proportion of degranulated mast cells (62%, P < 0.01) and lower histamine levels were observed after 6 h of C48/80 challenge, compared to control (32%). This effect was abrogated by Gal-1 and SCG, which reduced mast cell degranulation (31-36%), eosinophil migration and eosinophil peroxidase levels in the eyes. Gal-1 (3 mu g) and SCG treatments also decreased IL-4 levels, as well as activation of mitogen activated protein kinases compared to untreated C48/80 eyes. Our findings suggest that Gal-1 eye drops represent a new therapeutic strategy for ocular allergic inflammation. (AU)

FAPESP's process: 16/02012-4 - Evaluation of the immunomodulatory activity of annexin A1 protein in the regulation of inflammatory disorders of the gastrointestinal system: studies in vivo and in vitro experimental models
Grantee:Sonia Maria Oliani
Support Opportunities: Regular Research Grants
FAPESP's process: 15/09858-3 - Mechanisms of action of the galectin-1 and -3 proteins in the allergic inflammation: Study in in vivo and in vitro experimental models and in allergic patients
Grantee:Cristiane Damas Gil
Support Opportunities: Regular Research Grants