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Erschienen in: Documenta Ophthalmologica 2/2010

01.10.2010 | Original research article

Cone ERG responses in patients with Smith-Lemli-Opitz Syndrome (SLOS)

verfasst von: Deirdre Garry, Ronald M. Hansen, Anne Moskowitz, Ellen R. Elias, Mira Irons, Anne B. Fulton

Erschienen in: Documenta Ophthalmologica | Ausgabe 2/2010

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Abstract

Purpose

To evaluate cone and cone-driven retinal function in patients with Smith-Lemli-Opitz syndrome (SLOS), a condition characterized by low cholesterol. Rod and rod-driven function in patients with SLOS are known to be abnormal.

Methods

Electroretinographic (ERG) responses to full-field stimuli presented on a steady, rod suppressing background were recorded in 13 patients who had received long-term cholesterol supplementation. Cone photoresponse sensitivity (S CONE) and saturated amplitude (R CONE) parameters were estimated using a model of the activation of phototransduction, and post-receptor b-wave and 30 Hz flicker responses were analyzed. The responses of the patients were compared to those of control subjects (N = 13).

Results

Although average values of both S CONE and R CONE were lower than in controls, the differences were not statistically significant. Post-receptor b-wave amplitude and implicit time and flicker responses were normal.

Conclusions

The normal cone function contrasts with the significant abnormalities in rod function that were found previously in these same patients. Possibly, cholesterol supplementation has a greater protective effect on cones than on rods as has been demonstrated in the rat model of SLOS.
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Metadaten
Titel
Cone ERG responses in patients with Smith-Lemli-Opitz Syndrome (SLOS)
verfasst von
Deirdre Garry
Ronald M. Hansen
Anne Moskowitz
Ellen R. Elias
Mira Irons
Anne B. Fulton
Publikationsdatum
01.10.2010
Verlag
Springer-Verlag
Erschienen in
Documenta Ophthalmologica / Ausgabe 2/2010
Print ISSN: 0012-4486
Elektronische ISSN: 1573-2622
DOI
https://doi.org/10.1007/s10633-010-9232-3

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