Fig. 6

In vivo exposure to QDs caused dysfunctions of immune cells in BALB/c mice. A Representative FACS pictures describing the subsets of spleen lymphocytes from untreated or treated mice. a–c control; d–f QDs. B Statistical analysis of T lymphocytes (CD3ɛ⁺), B lymphocytes (CD19⁺) and NK lymphocytes (CD49b⁺) (n = 5). C Cell viability of spleen lymphocytes from QDs-treated mice on Day 42 (n = 4). D Cytokines release of spleen lymphocytes from QDs-treated or untreated mice (n = 4). E Activation ability of lymphocytes from QDs-treated or untreated mice in response to foreign stimulus LPS and ConA for 48 h (n = 4). The values are the mean ± SD, *P < 0.05 vs. control, **P < 0.01 vs. control