The effects of maternal exposure to MCP230 on the pulmonary T cell populations in postnatal life of offspring. Lung samples were obtained from infant mice at six days, three weeks and six weeks of postnatal age. Lung cells were isolated, stimulated with PMA and ionomycin, and stained with surface antibodies and intracellular antibodies. T cells subsets were then quantified using flow cytometry. Data were expressed as means ± SEM (n =5-8/group). *p < 0.05, NS vs. MCP230.