AI Article Synopsis

  • Astaxanthin (AST) is a powerful natural antioxidant and anti-inflammatory compound that can help combat chronic diseases.
  • In the study, Polysorbate 20 was identified as the best emulsifier for creating AST nanodispersions, resulting in smaller particle sizes and better distribution.
  • These AST nanodispersions showed positive effects on retinal health in a mouse model, improving retinal function and protecting against degeneration through various tests, including MEA assays that assessed visual signal pathways.

Article Abstract

Astaxanthin (AST) is a naturally occurring carotenoid with potent anti-oxidative and anti-inflammatory potency against chronic diseases. In this study, we suspended AST in different nonionic emulsifiers to produce nanodispersions. The basic physicochemical properties of the produced AST nanodispersions were verified to select the optimized nonionic emulsifier. Among the tested emulsifiers, Polysorbate 20 produced the AST nanoemulsions with smaller particle diameters, narrower size distributions, and higher AST contents among these emulsifiers. The -methyl--nitrosourea (MNU) administered mouse is a chemically induced retinal degeneration (RD) model with rapid progress rate. AST suspended in Polysorbate 20 was demonstrated to ameliorate the dramatic consequences of MNU on retina architectures and function in several different tests encompassing from electrophysiology to histology and molecular tests. Furthermore, the multi-electrodes array (MEA) was used to detect the firing activities of retinal ganglion cells within the inner retinal circuits. We found that AST nanodispersions could restrain the spontaneous firing response, enhance the light induced firing response, and preserve the basic configurations of visual signal pathway in degenerative retinas. The MEA assay provided an appropriate example to evaluate the potency of pharmacological compounds on retinal plasticity. In summary, emulsifier type affects the basic physicochemical characteristic of AST nanodispersions. Polysorbate 20 acts as an optimized nonionic emulsifier for the efficient delivery of AST nanodispersions to retina. AST nanodispersions can alleviate the photoreceptor loss and rectify the abnormities in visual signal transmission.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6882443PMC
http://dx.doi.org/10.1080/10717544.2019.1682718DOI Listing

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Article Synopsis
  • Astaxanthin (AST) is a powerful natural antioxidant and anti-inflammatory compound that can help combat chronic diseases.
  • In the study, Polysorbate 20 was identified as the best emulsifier for creating AST nanodispersions, resulting in smaller particle sizes and better distribution.
  • These AST nanodispersions showed positive effects on retinal health in a mouse model, improving retinal function and protecting against degeneration through various tests, including MEA assays that assessed visual signal pathways.
View Article and Find Full Text PDF

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