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. 2020 Oct 22;18:151. doi: 10.1186/s12951-020-00710-6

Fig. 2.

Fig. 2

Higher level of Sr-exosomal PD-L1 in OS patients with pulmonary metastasis compared to ones without metastasis. ad Radiological images of four OS patients with and without pulmonary metastasis. e Western blot analysis revealing significant difference for Sr-exosomal PD-L1 level in serum exosomes derived from patients with and without pulmonary metastasis; f ELISA analysis showing higher level of exosomal PD-L1 in serum of pulmonary metastasis patients compared to ones without metastasis