PMID- 9389401 OWN - NLM STAT- MEDLINE DCOM- 19980127 LR - 20191210 IS - 0166-0934 (Print) IS - 0166-0934 (Linking) VI - 68 IP - 2 DP - 1997 Nov TI - Extraction and purification of active IgG from SSPE and MS brain. PG - 119-25 AB - Immunoglobulin (Ig) G was purified from soluble and membrane fractions of postmortem subacute sclerosing panencephalitis (SSPE) brain, multiple sclerosis (MS) brain plaque-periplaque white matter, and normal human brain (NHB) white matter. After homogenization in 0.32 M sucrose and removal of cell debris and nuclei by low-speed centrifugation, soluble and crude membrane fractions were separated by ultracentrifugation. After removal of sucrose by dialysis, IgG was isolated from the soluble fraction by protein A affinity chromatography. IgG was obtained from the membrane fraction by elution at low pH and purification from the eluate by protein A chromatography. Whereas very little IgG was in NHB white matter, significant levels of IgG were recovered from both SSPE and MS brain. Both immunocytochemical staining of measles virus-infected cells in tissue culture and protein immunoblotting of virus-infected cell lysates showed that the IgG from SSPE brain contained activity specific for measles virus protein. The abundance, purity and functional activity of IgG extracted from SSPE and MS brain indicate that IgG extracted from the brain of humans with an inflammatory disease of unknown etiology can be used to identify its corresponding antigen. FAU - Owens, G P AU - Owens GP AD - Department of Neurology, University of Colorado Health Sciences Center, Denver 80262, USA. gregory.owens@UCHSC.edu FAU - Burgoon, M P AU - Burgoon MP FAU - Devlin, M E AU - Devlin ME FAU - Gilden, D H AU - Gilden DH LA - eng GR - NS 07321/NS/NINDS NIH HHS/United States GR - NS 32308/NS/NINDS NIH HHS/United States PT - Journal Article PT - Research Support, U.S. Gov't, P.H.S. PL - Netherlands TA - J Virol Methods JT - Journal of virological methods JID - 8005839 RN - 0 (Antibodies, Viral) RN - 0 (Immunoglobulin G) RN - 0 (Nucleocapsid Proteins) RN - 9004-70-0 (Collodion) SB - IM MH - Animals MH - Antibodies, Viral/*isolation & purification/metabolism MH - Brain Chemistry/*immunology MH - Cell Line MH - Cell Membrane/immunology MH - Chlorocebus aethiops MH - Collodion MH - Electrophoresis, Polyacrylamide Gel MH - Humans MH - Immunoblotting MH - Immunoglobulin G/*isolation & purification/metabolism MH - Isoelectric Focusing MH - Kidney/cytology MH - Measles virus/immunology MH - Multiple Sclerosis/*immunology MH - Nucleocapsid Proteins/immunology MH - Protein Denaturation MH - Solubility MH - Subacute Sclerosing Panencephalitis/*immunology EDAT- 1997/12/06 00:00 MHDA- 1997/12/06 00:01 CRDT- 1997/12/06 00:00 PHST- 1997/12/06 00:00 [pubmed] PHST- 1997/12/06 00:01 [medline] PHST- 1997/12/06 00:00 [entrez] AID - S0166-0934(97)00118-3 [pii] AID - 10.1016/s0166-0934(97)00118-3 [doi] PST - ppublish SO - J Virol Methods. 1997 Nov;68(2):119-25. doi: 10.1016/s0166-0934(97)00118-3.