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Biomedical subjects

E Vadot

Publications and source records attributed to E Vadot.

At least 37 records · Page 2Linked to original sources
PubMed1984

[Identification of the so-called 48 K protein that interacts with illuminated rhodopsin in retinal rods, and the retinal S antigen, inductor of experimental autoimmune uveoretinitis].

In Vertebrate retinal rod outer segments, a soluble "48 K" protein binds to disk membranes upon illumination in presence of ATP or GTP (H. Kühn, Biochemistry, 17, 1978, p. 4389). Its binding to photoexcited rhodopsin implies a probable role of the "48 K" protein in the ATP dependent regulation of the photoinduced enzymatic cascade which controls the hydrolysis of cGMP. The "retinal S antigen" is also a soluble protein located in photoreceptor cells which is known to be an organ-specific auto-antigen inducing experimental autoimmune uveoretinitis. Using extracts of purified cattle and frog rod outer segments, purified bovine S antigen, and monoclonal antibodies against S antigen, we found that both proteins exhibit identical characteristics with respect to: their migration in SD S-gel electrophoresis; their binding to rod disc membranes upon illumination in presence of ATP or GTP; their immunological reactivity with monoclonal antibodies.

Animals↗
PubMed1981

Macular sparing investigated by means of Haidinger brushes.

Haidinger brushes, an entoptic phenomenon perceived only through the most central macular retina, have been used in addition to kinetic and static perimetry with the Tubingen perimeter for determining macular sparing and splitting in hemianopic patients. Seven patients were examined: 2 with a bitemporal hemianopia resulting from traumatic damage to the optic chiasma, and 5 with a homonymous hemianopia resulting from extensive lesions of the optic radiations and/or the occipital cortex (including 2 cases of hemidecortication). On perimetric examination some exceptions could be observed in the correspondence of macular splitting and sparing respectively with pre- and postgeniculate lesions, but this was not the case when Haidinger brushes were used. Half of the figure was then perceived by the patients with lesions of the chiasma and the entire figure by all the patients with geniculostriate lesions. We consider that results obtained by this simple method are more reliable than those obtained by perimetry and that Haidinger brushes should be used for macular field examination in neuro-ophthalmic practice.

Adolescent↗