Cross-reactivity of anti-human chemokine receptor and anti-TNF family antibodies with common marmoset (Callithrix jacchus) leukocytes

The common marmoset (Callithrix jacchus) is a New World primate species frequently employed for immunological models of human disease. We used flow cytometry to screen a panel of new anti-human antibodies from the HLDA8 workshop to establish cross-reactivity with marmoset peripheral blood mononuclear cells. Seventy-seven antibodies were screened of which nine antibodies showed binding. Cross-reactivity of anti-human monoclonal antibodies with CC and CXC chemokine receptors CCR3, CCR6, CCR7, and CCR8 was demonstrated on untreated marmoset mononuclear cells. Stimulation of marmoset mononuclear cells with ConA and/or PMA-ionomycin resulted in an up-regulated expression of CXCR1, CXCR3, and CXCR4. The expression of TNF-family related molecules TACI and APRIL on marmoset mononuclear cells was also identified. These studies extend the range of cross-reactive antibodies to now include anti-chemokine and anti-TNF family antibodies for this important pre-clinical model species and should provide useful tools for investigation of immunological processes in marmoset monkey models.