Lectin histochemical study of lipopigments with special regard to neuronal ceroid-lipofuscinosis. Results with concanavalin A.

Histochemistry
M Elleder

Abstract

Concanavalin A (ConA) binding to lipopigments (LPs) of the lipofuscin type was proved to be due to the high content of mannose. The nature of the mannose bearing compound was twofold. One part was soluble in modified chloroform-methanol-water mixture (10:10:3) corresponding possibly to the oligosaccharyl diphosphodolichol (oligo-PP-Dol) described to be increased in LPs especially of inherited types. The second part, most probably a glycoprotein (GP), was entirely resistant to various extraction procedures. The ratio of the two components varied. The deposition of the typical lipofuscin (age pigment) was dominated by the GP component. Its amount was greatest in neurolipofuscin (especially in the olivary nucleus) and in the myocardium but very little in hepatocytic lipofuscin. In human neuronal ceroid lipofuscinoses (of early juvenile, and juvenile types) both components were found in large quantities in the storage granules of the affected neurons. The "protein type variant" of the storage material (Elleder 1978) displayed the highest degree of lipid-bound mannose accumulation, the GP component being extremely low or entirely absent. In the late infantile, infantile and Kufs variants studied in paraffin sections only, the GP com...Continue Reading

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Citations

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Batten Disease

Batten Disease is a group of nervous system disorders known as neuronal ceroid lipofuscinosis. This feed focuses on neurobiological and neuropathological aspects of this disease.