Abstract
BackgroundCalcium sensing receptor (CaSR) is widely expressed in many tissues of the body, but it is rarely reported to be expressed in the eyes. This research explored the expression and distribution of CaSR in eye tissues of normal and diabetic rats.Material/MethodsThirty male Sprague Dawley (SD) rats were randomly divided into a diabetic and a normal group. Diabetes mellitus (DM) models were successfully established by intraperitoneal injection of streptozotocin. The expression and distribution of CaSR in the rat eyeballs were detected by immunohistochemistry. Quantitative RT-PCR and western blotting were used to detect the presence of CaSR in normal and diabetic rats.ResultsCaSR was detected in the cornea, lens epithelium, and retina. CaSR was expressed the most in the cornea, followed by the lens epithelium, and the retina (p<0.05). The expression of CaSR was decreased in the eye tissue of diabetic rats (p<0.05).ConclusionsIn this study, CaSR was detected in rat cornea, lens, and retina. It was significantly decreased in the eyes of diabetic rats. This indicated that the downregulated expression of CaSR was associated with diabetic oculopathy.
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