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BIBTEX RIS

Optic nerve histopathology in a case of Wolfram Syndrome: A mitochondrial pattern of axonal loss

2013; Elsevier BV; Volume: 13; Issue: 6 Linguagem: Inglês

10.1016/j.mito.2013.05.013

1872-8278

Fred N. Ross‐Cisneros, Billy X. Pan, Ruwan A. Silva, Neil R. Miller, Thomas A. Albini, Lisbeth Tranebjærg, Nanna Dahl Rendtorff, Marianne Lodahl, Milton N. Moraes-Filho, Milton Moraes, Solange Rios Salomão, Adriana Berezovsky, Rubens Belfort, Valério Carelli, Alfredo A. Sadun,

ATP Synthase and ATPases Research

Mitochondrial dysfunction in Wolfram Syndrome (WS) is controversial and optic neuropathy, a cardinal clinical manifestation, is poorly characterized. We here describe the histopathological features in postmortem retinas and optic nerves (ONs) from one patient with WS, testing the hypothesis that mitochondrial dysfunction underlies the pathology. Eyes and retrobulbar ONs were obtained at autopsy from a WS patient, and compared with those of a Leber hereditary optic neuropathy (LHON) patient and one healthy control. Retinas were stained with hematoxylin & eosin for general morphology and ONs were immunostained for myelin basic protein (MBP). Immunostained ONs were examined in four "quadrants": superior, inferior, nasal, and temporal. The WS retinas displayed a severe loss of retinal ganglion cells in the macular region similar to the LHON retina, but not in the control. The WS ONs, immunostained for MBP, revealed a zone of degeneration in the temporal and inferior quadrants. This pattern was similar to that seen in the LHON ONs but not in the control. Thus, the WS patient displayed a distinct pattern of optic atrophy observed bilaterally in the temporal and inferior quadrants of the ONs. This arrangement of axonal degeneration, involving primarily the papillomacular bundle, closely resembled LHON and other mitochondrial optic neuropathies, supporting that mitochondrial dysfunction underlies its pathogenesis.