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Regulation of cAMP responses by ecto-ADA and CD73. Human gingival fibroblasts (5.0 × 105 cells/well) were incubated with or without Jurkat lysate for 30 min at 37°C and stimulated with 20 μM AMP for 5 min at 37°C in the presence or absence of 5 μM dCF. The data shown are the mean ± SD of 4 cAMP determinations and are representative of 3 separate experiments. *p < 0.05 compared with the lysate (-) dCF (-) group. **p < 0.05 compared with the lysate (+) dCF (-) group.
