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Molecular Medicine Volume 10

Articles from this Volume

Ying Yu, Jill Wylie-Sears, Elisa Boscolo, John B Mulliken, and Joyce Bischoff

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Posted by MolMed Editor on Dec 3, 2004 12:00 AM CST
Cristina Morelli, Federica Barbisan, Laura Iaccheri, and Mauro Tognon
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Posted by MolMed Editor on Dec 2, 2004 12:00 AM CST
Mourad Tayebi, Perry Enever, Zahid Sattar, John Collinge, and Simon Hawke

Prion diseases such as Creutzfeldt-Jakob disease are believed to result from the misfolding of a widely expressed normal cellular prion protein, PrPc. The resulting disease-associated isoforms, PrPSc, have much higher β-sheet content, are insoluble in detergents, and acquire relative resistance to proteases. Although known to be highly aggregated and to form amyloid fibrils, the molecular architecture of PrPSc is poorly understood. To date, it has been impossible to elicit antibodies to native PrPSc that are capable of recognizing PrPSc without denaturation, even in Prn-Pº/º mice that are intolerant of it. Here we demonstrate that antibodies for native PrPc and PrPSc can be produced by immunization of Prn-Pº/º mice with partially purified PrPc and PrPSc adsorbed to immunomagnetic particles using high-affinity anti-PrP monoclonal antibodies (mAbs). Interestingly, the polyclonal response to PrPSc was predominantly of the immunoglobulin M (IgM) isotype, unlike the immunoglobulin G (IgG) responses elicited by PrPc or by recombinant PrP adsorbed or not to immunomagnetic particles, presumably reflecting the polymeric structure of disease-associated prion protein. Although heat-denatured PrPSc elicited more diverse antibodies with the revelation of C-terminal epitopes, remarkably, these were also predominantly IgM suggesting that the increasing immunogenicity, acquisition of protease sensitivity, and reduction in infectivity induced by heat are not associated with dissociation of the PrP molecules in the diseased-associated protein. Adsorbing native proteins to immunomagnetic particles may have general applicability for raising polyclonal or monoclonal antibodies to any native protein, without attempting laborious purification steps that might affect protein conformation. Online address: 

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Posted by MolMed Editor on Dec 1, 2004 12:00 AM CST
Davorka Messmer, Gloria Telusma, Tarun Wasil, Bradley T Messmer, Steven Allen, Kanti R Rai, and Nicholas Chiorazzi

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Posted by MolMed Editor on Nov 1, 2004 12:00 AM CST
Kostas Stamatopoulos, Chrysoula Belessi, Theodora Papadaki, Evangelia Kalagiakou, Niki Stavroyianni, Vassiliki Douka, Stavroula Afendaki, Riad Saloum, Aikaterini Parasi, Dimitra Anagnostou, Nikolaos Laoutaris, Athanasios Fassas, and Achilles Anagnostopoulos

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Posted by MolMed Editor on Oct 1, 2004 12:00 AM CDT
Posted by MolMed Editor on Sep 1, 2004 12:00 AM CDT
Aleksandar M Babic, Hong-Wei Wang, Margaret J Lai, Thomas G Daniels, Thomas W Felbinger, Peter C Burger, Alain Stricker-Krongrad, and Denisa D Wagner

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Posted by MolMed Editor on Aug 1, 2004 12:00 AM CDT
Louise Chang, Shian-Huey Chiang, and Alan L Saltiel

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Posted by MolMed Editor on Jul 1, 2004 12:00 AM CDT