Laurence Beral1,2, Marc Romana2,3, Nathalie Lemonne4, Yoann Garnier2,3, Marie Billaud4, Malik Acomat1, Coralie Zorobabel1, Maryse Etienne-Julan4, Thierry David1,5, Philippe Connes6,7,8,9. 1. Service d'ophtalmologie, CHU de Pointe-à-Pitre/ Abymes, r de Chauvel, Pointe-à-Pitre, Guadeloupe, France. 2. UMR Inserm 1134, Biologie Intégrée du Globule Rouge, INSERM/Université Paris Diderot-Université Sorbonne Paris Cité/INTS/Université des Antilles, Guadeloupe, France. 3. Laboratoire d'Excellence GR-Ex « The red cell: from genesis to death », PRES Sorbonne Paris Cité, Paris, France. 4. Unité transversale de la Drépanocytose, CHU de Pointe-à-Pitre/ Abymes, r de Chauvel, Pointe-à-Pitre, Guadeloupe, France. 5. Université des Antilles, Guadeloupe (FWI), France. 6. UMR Inserm 1134, Biologie Intégrée du Globule Rouge, INSERM/Université Paris Diderot-Université Sorbonne Paris Cité/INTS/Université des Antilles, Guadeloupe, France. pconnes@yahoo.fr. 7. Laboratoire d'Excellence GR-Ex « The red cell: from genesis to death », PRES Sorbonne Paris Cité, Paris, France. pconnes@yahoo.fr. 8. Laboratoire Interuniversitaire de Biologie de la Motricité (LIBM), EA7424, Equipe Biologie Vasculaire et du Globule Rouge, Université Claude Bernard Lyon 1, COMUE Lyon, Villeurbanne, France. pconnes@yahoo.fr. 9. Institut Universitaire de France, Paris, France. pconnes@yahoo.fr.
Abstract
BACKGROUND: The aim of the present work was to describe and compare multifocal electroretinogram findings (mfERG) between patients with sickle cell disease (SCD) without clinical sign of maculopathy and controls (HbAA). METHODS: Both HbSS (homozygous SCD) and HbSC (compound heterozygous SCD) patients, the two most frequent SCD genotypes, were included. All individuals underwent a full ophthalmologic examination (with a fundoscopy), a spectral domain ocular coherence tomography (SD-OCT) and a mfERG. RESULTS: A total of 86 subjects were included: 54 SCD patients (107 eyes) with 32 HbSS (63 eyes) and 22 HbSC (44 eyes) and 32 controls (64 eyes). None of the eyes showed retinal clinical abnormalities. SD-OCT analysis showed that macular thickness was statistically lower in SCD eyes than in controls. mfERG analysis demonstrated a significant reduction of N1 (initial-negative deflection), and P1 (positive peak) response amplitude densities of HbSS eyes compared to HbAA eyes from the centre (<2°) and to the periphery (>15°). Implicit time response was also reduced in the centre (<2°). N1 and P1 response amplitude densities of HbSC eyes were significantly lower than those of HbAA eyes from the centre (<2°) to the periphery (>15°). N1 implicit time was statistically reduced in HbSS compared to HbSC eyes. CONCLUSION: Our study is the first one to describe macular electrophysiological dysfunction in SCD patients. Moreover, we confirm that SCD maculopathy is equally frequent in HbSS and HbSC.
BACKGROUND: The aim of the present work was to describe and compare multifocal electroretinogram findings (mfERG) between patients with sickle cell disease (SCD) without clinical sign of maculopathy and controls (HbAA). METHODS: Both HbSS (homozygous SCD) and HbSC (compound heterozygous SCD) patients, the two most frequent SCD genotypes, were included. All individuals underwent a full ophthalmologic examination (with a fundoscopy), a spectral domain ocular coherence tomography (SD-OCT) and a mfERG. RESULTS: A total of 86 subjects were included: 54 SCDpatients (107 eyes) with 32 HbSS (63 eyes) and 22 HbSC (44 eyes) and 32 controls (64 eyes). None of the eyes showed retinal clinical abnormalities. SD-OCT analysis showed that macular thickness was statistically lower in SCD eyes than in controls. mfERG analysis demonstrated a significant reduction of N1 (initial-negative deflection), and P1 (positive peak) response amplitude densities of HbSS eyes compared to HbAA eyes from the centre (<2°) and to the periphery (>15°). Implicit time response was also reduced in the centre (<2°). N1 and P1 response amplitude densities of HbSC eyes were significantly lower than those of HbAA eyes from the centre (<2°) to the periphery (>15°). N1 implicit time was statistically reduced in HbSS compared to HbSC eyes. CONCLUSION: Our study is the first one to describe macular electrophysiological dysfunction in SCDpatients. Moreover, we confirm that SCD maculopathy is equally frequent in HbSS and HbSC.
Authors: Xuejing Chen; Ehsan Rahimy; Robert C Sergott; Renata P Nunes; Eduardo C Souza; Netan Choudhry; Nathan E Cutler; Samuel K S Houston; Marion R Munk; Amani A Fawzi; Sonia Mehta; Jean-Pierre Hubschman; Allen C Ho; David Sarraf Journal: Am J Ophthalmol Date: 2015-04-04 Impact factor: 5.258