Transplanted neurons integrate into adult retinas and respond to light

Praseeda Venugopalan, Yan Wang, Tu Nguyen, Abigail Huang, Kenneth J. Muller () and Jeffrey L. Goldberg ()
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Praseeda Venugopalan: Neuroscience Program, University of Miami
Yan Wang: Shiley Eye Center, University of California
Tu Nguyen: Shiley Eye Center, University of California
Abigail Huang: Shiley Eye Center, University of California
Kenneth J. Muller: Neuroscience Program, University of Miami
Jeffrey L. Goldberg: Neuroscience Program, University of Miami

Nature Communications, 2016, vol. 7, issue 1, 1-9

Abstract: Abstract Retinal ganglion cells (RGCs) degenerate in diseases like glaucoma and are not replaced in adult mammals. Here we investigate whether transplanted RGCs can integrate into the mature retina. We have transplanted GFP-labelled RGCs into uninjured rat retinas in vivo by intravitreal injection. Transplanted RGCs acquire the general morphology of endogenous RGCs, with axons orienting towards the optic nerve head of the host retina and dendrites growing into the inner plexiform layer. Preliminary data show in some cases GFP+ axons extending within the host optic nerves and optic tract, reaching usual synaptic targets in the brain, including the lateral geniculate nucleus and superior colliculus. Electrophysiological recordings from transplanted RGCs demonstrate the cells’ electrical excitability and light responses similar to host ON, ON–OFF and OFF RGCs, although less rapid and with greater adaptation. These data present a promising approach to develop cell replacement strategies in diseased retinas with degenerating RGCs.

Date: 2016
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DOI: 10.1038/ncomms10472

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