Our long-term goals have been to identify the pathways and underlying mechanisms of synaptic transmission in the retina. We also seek to understand how synaptic pathways are regulated during development and how this development is influenced by visual inputs. Recently it has been discovered that the development of ON-OFF pathways in mouse retina requires visual stimulation. We seek to understand and characterize the role of glutamatergic synaptic transmission in guiding and promoting development of ON-OFF pathways and other synaptic pathways. A further aim is to determine how a decrease of pattern vision in young animals governs the development of synaptic pathways and visual function in retina. A final goal is to characterize how visual deprivation, produced by dark rearing, affects the development of inhibitory pathways and the functional structure of ganglion cell receptive fields. It has been commonly assumed that development of retina is not affected by visual deprivation. The profound refinements of visual function and neuronal connectivity observed in higher centers of the visual system were thought to originate in these higher regions. Now, given that visual deprivation can influence retinal function, these concepts will have to be reevaluated. These studies will be performed in mouse retina. The mouse is becoming a well-characterized and much utilized model system for development in mammals. In addition, because of the relative ease in creating transgenically engineered mice, there has been a rapid expansion in the availability of cellular markers and specific molecular deletion in these species. Even more important, however, is that the retina, being one of the best studied and well characterized areas of the visual system, affords us a chance to investigate more easily the cellular mechanisms that control development and plasticity. ? ?

National Institute of Health (NIH)
National Eye Institute (NEI)
Research Project (R01)
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Biology and Diseases of the Posterior Eye Study Section (BDPE)
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Mariani, Andrew P
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University of California San Francisco
Schools of Medicine
San Francisco
United States
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Delwig, Anton; Chaney, Shawnta Y; Bertke, Andrea S et al. (2018) Melanopsin expression in the cornea. Vis Neurosci 35:E004
Delwig, Anton; Larsen, DeLaine D; Yasumura, Douglas et al. (2016) Retinofugal Projections from Melanopsin-Expressing Retinal Ganglion Cells Revealed by Intraocular Injections of Cre-Dependent Virus. PLoS One 11:e0149501
Rao, Sujata; Chun, Christina; Fan, Jieqing et al. (2013) A direct and melanopsin-dependent fetal light response regulates mouse eye development. Nature 494:243-6
Delwig, Anton; Majumdar, Sriparna; Ahern, Kelly et al. (2013) Glutamatergic neurotransmission from melanopsin retinal ganglion cells is required for neonatal photoaversion but not adult pupillary light reflex. PLoS One 8:e83974
Delwig, Anton; Logan, Anne M; Copenhagen, David R et al. (2012) Light evokes melanopsin-dependent vocalization and neural activation associated with aversive experience in neonatal mice. PLoS One 7:e43787
Chen, Albert I; Nguyen, Cindy N; Copenhagen, David R et al. (2011) TrkB (tropomyosin-related kinase B) controls the assembly and maintenance of GABAergic synapses in the cerebellar cortex. J Neurosci 31:2769-80
Yoshida, Miho; Feng, Liang; Grimbert, Francois et al. (2011) Overexpression of neurotrophin-3 stimulates a second wave of dopaminergic amacrine cell genesis after birth in the mouse retina. J Neurosci 31:12663-73
Johnson, Juliette; Wu, Vincent; Donovan, Michael et al. (2010) Melanopsin-dependent light avoidance in neonatal mice. Proc Natl Acad Sci U S A 107:17374-8
Liu, Xiaorong; Robinson, Michael L; Schreiber, Ann Marie et al. (2009) Regulation of neonatal development of retinal ganglion cell dendrites by neurotrophin-3 overexpression. J Comp Neurol 514:449-58
Blankenship, Aaron G; Ford, Kevin J; Johnson, Juliette et al. (2009) Synaptic and extrasynaptic factors governing glutamatergic retinal waves. Neuron 62:230-41

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