Melanoma Associated Retinopathy (MAR) is a paraneoplastic visual syndrome associated with cutaneous malignant melanoma in which patients typically experience a sudden decrease in night vision and sensations of shimmering lights. Electroretinogram (ERG) recordings from MAR patients are characterized by a """"""""negative"""""""" waveform in which the a-wave, arising from photoreceptor transduction, is normal, but the b-wave, arising primarily from ON-bipolar cell activation, is absent or reduced. Significantly, serum from MAR patients has been shown to label retinal bipolar cells. The proposed research tests the hypothesis that autoantibodies in MAR patient serum are generated against proteins expressed in metastatic malignant melanocytes, but then target a protein complex functional in bipolar cells.
The aims of the research are to identify the retinal antigens in MAR, to elucidate the role of these proteins in normal bipolar cell physiology, and determine how these functions are perturbed in MAR.
The aims will be addressed with a multidisciplinary approach combining immunohistochemistry, cell biology, biochemistry, and electrophysiology. The results will generate new insights into cellular processes fundamental to vision and will contribute to our understanding of the link between cancer and autoimmune retinopathy.
The proposed research will provide new insights into fundamental visual processes in the normal retina, and reveal how they are altered in autoimmune retinopathy. Identification of the retinal antigens in melanoma associated retinopathy will have applications in the clinic in the treatment of patients at risk for cancer associated autoimmune visual disease and in early diagnosis of tumor metastasis.
| Duvoisin, Robert M; Haley, Tammie L; Ren, Gaoying et al. (2017) Autoantibodies in Melanoma-Associated Retinopathy Recognize an Epitope Conserved Between TRPM1 and TRPM3. Invest Ophthalmol Vis Sci 58:2732-2738 |
| Fox, Austin R; Gordon, Lynn K; Heckenlively, John R et al. (2016) Reply. Am J Ophthalmol 170:242-243 |
| Fox, Austin R; Gordon, Lynn K; Heckenlively, John R et al. (2016) Consensus on the Diagnosis and Management of Nonparaneoplastic Autoimmune Retinopathy Using a Modified Delphi Approach. Am J Ophthalmol 168:183-190 |
| Guimarães-Souza, E M; Perche, O; Morgans, C W et al. (2016) Fragile X Mental Retardation Protein expression in the retina is regulated by light. Exp Eye Res 146:72-82 |
| Xiong, Wei-Hong; Pang, Ji-Jie; Pennesi, Mark E et al. (2015) The Effect of PKC? on the Light Response of Rod Bipolar Cells in the Mouse Retina. Invest Ophthalmol Vis Sci 56:4961-74 |
| Brown, R Lane; Xiong, Wei-Hong; Peters, James H et al. (2015) TRPM3 expression in mouse retina. PLoS One 10:e0117615 |
| Xiong, Wei-Hong; Brown, R Lane; Reed, Brian et al. (2015) Voriconazole, an antifungal triazol that causes visual side effects, is an inhibitor of TRPM1 and TRPM3 channels. Invest Ophthalmol Vis Sci 56:1367-73 |
| Morgans, Catherine W (2015) All ON pathways are not alike. J Physiol 593:1527-8 |
| Neuillé, Marion; Morgans, Catherine W; Cao, Yan et al. (2015) LRIT3 is essential to localize TRPM1 to the dendritic tips of depolarizing bipolar cells and may play a role in cone synapse formation. Eur J Neurosci 42:1966-75 |
| Xiong, Wei-Hong; Duvoisin, Robert M; Adamus, Grazyna et al. (2013) Serum TRPM1 autoantibodies from melanoma associated retinopathy patients enter retinal on-bipolar cells and attenuate the electroretinogram in mice. PLoS One 8:e69506 |
Showing the most recent 10 out of 11 publications
