4.5 Article

Structural damage to the rat eye following long-term simulated weightlessness

期刊

EXPERIMENTAL EYE RESEARCH
卷 223, 期 -, 页码 -

出版社

ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.exer.2022.109200

关键词

Simulating weightlessness; Injury; Retina; Optic nerve

资金

  1. China HT Medical Engineering Pre Research Project [2017SY54A0302]
  2. Open Funding Project of the National Key Laboratory of Human Factors Engineering [SYFD180051808K]

向作者/读者索取更多资源

This study used prolonged tail suspension to simulate microgravity in space and observed the potential eye health impacts on rats. The results showed significant choroidal thickening, optic nerve demyelination, reduced survival of retinal ganglion cells, and fluctuations in intraocular pressure. The severity of these changes increased with longer suspension time.
To better perform space missions and develop human spaceflights, the eye health of astronauts is receiving increasing attention from researchers. In this study, we used prolonged tail suspension to simulate microgravity cephalad fluid shift in space to observe intraocular pressure (IOP) changes, retinal structure, and optic nerve damage in rats.We observed significant choroidal thickening and optic nerve demyelination lesions in the rats in each experimental group. At the cellular level, retinal ganglion cells (RGCs) survival was significantly reduced, optic nerve oligodendrocytes were reduced, and apoptotic factors and microglia-mediated inflammation-related fac-tors were detected in both the retina and optic nerve. The severity of these changes increased with increasing tails suspension time. In conclusion, simulated long-term microgravity can lead to slight intraocular pressure fluctuations, choroidal thickening, reduced RGCs survival, and optic nerve demyelination in rats.

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