Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8498437 | Fish & Shellfish Immunology | 2018 | 8 Pages |
Abstract
In crustaceans, lectins and hemocytes of the innate immune system provide the first line of defense. Although evidence points to the potential role of lectins in regulating hemocyte activity, the processes underlying the lectin activation have not been evaluated. In the present study, the receptor for CqL, a humoral lectin from Cherax quadricarinatus specific for galactose/sialic acid, was identified in a granular subset of hemocytes. The CqL receptor (CqLR) is a 490-kDa glycoprotein, composed of four identical 120-kDa subunits. As shown by immunohistochemistry, CqL at 7.5â¯Î¼g/mL as optimal dose, after 2â¯min, induced, specifically on granular hemocytes, increased phosphorylation of serine (152%), threonine (192%), and tyrosine (242%) as compared with non-treated hemocytes; moreover, CqL induced increased generation of reactive oxygen species (ROS). Specific kinase inhibitors showed inhibition (Pâ¯<â¯0.001) of ROS production induced by CqL. These results strongly suggest that CqL actively participated in the generation of ROS through kinases induced by a CqLR in a subset of granular hemocytes of the crayfish C. quadricarinatus. The results provide strong evidence that CqL activates, through specific granular hemocytes, receptors that modulate cellular functions in C. quadricarinatus.
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Authors
José Luis Sánchez-Salgado, Mohamed Alà Pereyra, Concepción Agundis, Oscar Vivanco-Rojas, Carlos Rosales, Cristina Pascual, Juan José Alpuche-Osorno, Edgar Zenteno,