TY - JOUR
T1 - Beta B1-crystallin
T2 - Identification of a candidate ciliary body uveitis antigen
AU - Stempel, David
AU - Sandusky, Hallie
AU - Lampi, Kirsten
AU - Cilluffo, Marianne
AU - Horwitz, Joe
AU - Braun, Jonathan
AU - Goodglick, Lee
AU - Gordon, Lynn K.
PY - 2003/1/1
Y1 - 2003/1/1
N2 - PURPOSE. Perineuclear anti-neutrophil cytoplasmic antibody (pANCA), a marker antibody present in 12% of patients with anterior uveitis, recognizes cytoplasmic antigens in the nonpigmented ciliary body epithelium, a probable site of immunologic reactivity in this inflammatory disease. In this study, a recombinantly isolated pANCA monoclonal antibody was used to identify the corresponding antigenic target(s) in the ciliary body. METHODS. Proteins from microdissected eye bank ocular ciliary body tissue were used to identify the corresponding ANCA antigen. Parallel two-dimensional protein gels were used for simultaneous identification of candidate antigenic protein spots by Western blot analysis and as a source of material for proteomic analysis. Multiple independent methods including Western blot analysis, confocal microscopy, and RT-PCR were used to provide additional characterization of the candidate protein. RESULTS. Proteomic analysis suggested that beta B1 (βB1)-crystallin is the primary ciliary body antigen. The presence of βB1-crystallin in the human ciliary body was confirmed by Western blot with a βB1 specific anti-peptide antibody. Confocal microscopy revealed colocalization of the antigenic reactivity of both anti-βB1 antibody and monoclonal pANCA. RT-PCR confirmed the presence of βB1-crystallin RNA in the ciliary body tissues. CONCLUSIONS. This study identified βB1-crystallin as a new cytoplasmic ciliary body antigenic target of a marker autoantibody associated with uveitis. This characterization of βB1-crystallin outside the lens raises questions about its extralenticular expression, intracellular role, and potential target of inflammation in uveitis.
AB - PURPOSE. Perineuclear anti-neutrophil cytoplasmic antibody (pANCA), a marker antibody present in 12% of patients with anterior uveitis, recognizes cytoplasmic antigens in the nonpigmented ciliary body epithelium, a probable site of immunologic reactivity in this inflammatory disease. In this study, a recombinantly isolated pANCA monoclonal antibody was used to identify the corresponding antigenic target(s) in the ciliary body. METHODS. Proteins from microdissected eye bank ocular ciliary body tissue were used to identify the corresponding ANCA antigen. Parallel two-dimensional protein gels were used for simultaneous identification of candidate antigenic protein spots by Western blot analysis and as a source of material for proteomic analysis. Multiple independent methods including Western blot analysis, confocal microscopy, and RT-PCR were used to provide additional characterization of the candidate protein. RESULTS. Proteomic analysis suggested that beta B1 (βB1)-crystallin is the primary ciliary body antigen. The presence of βB1-crystallin in the human ciliary body was confirmed by Western blot with a βB1 specific anti-peptide antibody. Confocal microscopy revealed colocalization of the antigenic reactivity of both anti-βB1 antibody and monoclonal pANCA. RT-PCR confirmed the presence of βB1-crystallin RNA in the ciliary body tissues. CONCLUSIONS. This study identified βB1-crystallin as a new cytoplasmic ciliary body antigenic target of a marker autoantibody associated with uveitis. This characterization of βB1-crystallin outside the lens raises questions about its extralenticular expression, intracellular role, and potential target of inflammation in uveitis.
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U2 - 10.1167/iovs.01-1261
DO - 10.1167/iovs.01-1261
M3 - Article
C2 - 12506076
AN - SCOPUS:0037207478
SN - 0146-0404
VL - 44
SP - 203
EP - 209
JO - Investigative Ophthalmology and Visual Science
JF - Investigative Ophthalmology and Visual Science
IS - 1
ER -