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. 1996 Jul 23;93(15):7460–7463. doi: 10.1073/pnas.93.15.7460

In vivo tissue distribution of CD4 lymphocytes in mice determined by radioimmunoscintigraphy with an 111In-labeled anti-CD4 monoclonal antibody.

R H Rubin 1, D Baltimore 1, B K Chen 1, R A Wilkinson 1, A J Fischman 1
PMCID: PMC38766  PMID: 8755495

Abstract

The tissue distribution of CD4 lymphocytes in normal C57/BL mice and CD4 knockout mice was determined by biodistribution measurements and gamma camera imaging with an 111In-labeled rat IgG2b monoclonal antibody directed against the murine CD-4 antigen. In normal mice high concentrations of antibody accumulated in the spleen and lymph nodes. At 45 hr after injection, the concentration of radiolabel in the spleen and lymph nodes of normal mice were 10- to 20-fold greater than in the corresponding tissue of the CD4 knockout mice and nonlymphoid tissues of both types of mice. At 24 and 45 hr, gamma camera images showed high concentrations of radiolabeled antibody in lymph node and spleen of normal but not knockout mice. These results indicate that radioimmunoscintigraphy with 111In-anti-CD4 is an excellent method for studying tissue distribution of CD lymphocytes in mice. Using an equivalent anti-human CD antibody, this method might be useful for studying the pathophysiology of conditions in which these cells play a critical role and for monitoring therapies for these disorders.

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