Figure 2. Qi Ling serum reversed the functional phenotype of TAMs in tumor milieu. (A and B) mRNA levels of M1 markers (iNOS and TNFα) and M2 markers (IL-10 and CCL22) in TAMs treated with Qi Ling or PBS were determined by qRT-PCR. (C and D) Protein levels of M1 markers (iNOS and TNFα) and M2 markers (IL-10 and CCL22) in TAMs treated with Qi Ling or PBS were measured by ELISA. The data represent the mean ± SD. **p < 0.01 determined by Student’s t-test.