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Open Access Utility of AntiPax5 in the Diagnosis of Lymphoproliferative Disorders and Neoplasia in Mice

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CD45R/B220 antigen (B220) is a common mouse panB-cell marker used for paraffin-embedded tissues. However, antiB220 has limited specificity in diagnostic pathology because the B220 antigen is expressed on subsets of cytotoxic T lymphocytes and natural killer cells, on plasmacytic dendritic cells, and on T lymphocytes of mice with the lymphoproliferative disorder associated with Fas (lymphoproliferative mutant mouse, B6.MRL-Faslpr/J) or Fas ligand (generalized lymphoproliferative disease mutant mouse, C3H/HeJ-Faslgld/J or B6Smn.C3-Faslgld/J). In addition, mouse B lymphocytes vary in the amount of B220 expressed, and some subsets of mouse B lymphocytes do not express B220 at all. In comparison, Pax5 expression (detected by immunohistochemistry using antiPax5) offers greater specificity and sensitivity because of its earlier expression during B-cell differentiation, its ability to detect all committed B cells, and its restriction to the B-cell lineage. Here we describe the use of an antibody to human Pax5 in diagnostic pathology with formalin-fixed, paraffin-embedded mouse tissue.

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Document Type: Research Article

Publication date: 01 June 2008

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  • Comparative Medicine (CM), an international journal of comparative and experimental medicine, is the leading English-language publication in the field and is ranked by the Science Citation Index in the upper third of all scientific journals. The mission of CM is to disseminate high-quality, peer-reviewed information that expands biomedical knowledge and promotes human and animal health through the study of laboratory animal disease, animal models of disease, and basic biologic mechanisms related to disease in people and animals.

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