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Soluble molecule present in PIOL but not in normal ocular microenvironment is able to abrogate in vitro effect of CpG-ODNs in a dose-dependent manner. 104 cells were stimulated for 72 hours with CpG or control ODNs at 30 μg/mL and in the presence of several diluted doses of control supernatant (PIE) or PIOL supernatant (1X, 1/20, 1/35, 1/50, 1/75, 1/100, 1/200, 1/500). The incorporation of the [3H] thymidine was measured by a scintillation counter. *P < 0.05; **P < 0.01.
