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. 2022 Aug 5;12:894279. doi: 10.3389/fonc.2022.894279

Figure 1.

Figure 1

Morphological and phenotypic features of tumor cells from newly established myeloma PDX. MM.1S cells and mononuclear cells isolated from BM and pleural effusion samples of MM patient were inoculated subcutaneously in NDG mice. When tumors reached 6-8 mm in diameter, tumors were removed and prepared for HE staining, IHC staining, and single-cell suspensions. (A) Representative image of myeloma MM.1S and PDX models. (B)The morphology of tumor cells from myeloma MM.1S and PDX models by Giemsa staining. Scale bar: 5 μm. (C) Representative IHC stainings of tumor tissues. Scale bar: 100 μm. (D) The single-cell suspensions were analyzed by flow cytometry. The doublet or aggregated events were gated out according to side scatter area (SSC-A) and side scatter width (SSC-W). 7-AAD staining was used to gate out dead cells. The expression levels of CD138, CD38, kappa, and lambda were analyzed in mouse CD45- cells. Myeloma cell line MM.1S was used as a positive myeloma cell control. The left panels of flow charts were isotype controls. PDX, patient-derived xenograft; HE, hematoxylin-eosin; IHC, immunohistochemical.