Human FDC express PrPcinvivoandinvitro

Author:

Thielen Caroline1,Antoine Nadine1,Mélot France1,Cesbron Jean-Yves2,Heinen Ernst1,Tsunoda Rikiya3

Affiliation:

1. lnstitute of Human Histology, University of Liège, rue de Pitteurs, 20 Bat. L3, Liège B-4020, Belgium

2. Neurodegenerative Infectous Disease, Dept. of Physiopathology, Institut Pasteur of Lille, France

3. Dept. of Histology, School of Medicine, Fukushima Medical University, I-Hikarigaoka, Fukushima 960-1295, Japan

Abstract

Prion diseases are fatal neurodegenerative disorders caused by accumulation of abnormal prion protein (protease-resistant prion, PrPres). PrPres accumulation is also detected in lymphoid organs after peripheral infection. Several studies suggest that follicular dendritic cells (FDC) could be the site of PrPres retention and amplification.Here we show that human follicular dendritic cells can express normal cellular prion protein (PrPc) bothinsituandinvitro. When tonsillar cryosections were treated with anti-PrP antibody, the label was found on some very delicate cell extensions inside the lymphoid follicles, especially in the germinal centres. These extensions react with DRC1 antibody, used frequently to label FDC. Other structures labelled with anti-PrP antibody were the keratinocytes.To confirm the ability of FDC to synthesise PrPc, we isolated FDC by a non-enzymatic procedure and cultured them. By cytochemistry and flow cytometry it was clearly shown that FDC do produce PrPc.

Funder

Fonds pour la Recherche Industrielle et Agricole

Publisher

Hindawi Limited

Subject

Developmental Biology,Immunology

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