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Fig. 4 | Cancer Cell International

Fig. 4

From: Napabucasin overcomes cisplatin resistance in ovarian germ cell tumor-derived cell line by inhibiting cancer stemness

Fig. 4

Comparison of morphology and some immunohistochemical characteristics of xenografts derived from parental and cisplatin-resistant NOY-1 cell line. a–d Hematoxylin and eosin staining showed that both xenografts contain extensive areas of necrosis. The viable tumor tissue focally shows glandular structures in the parental cell line, which are less apparent in the resistant cell line, which has a more solid growth pattern. The biggest difference between the lines is the more severe cyto-nuclear atypia in the resistant cell line, which mainly consists of larger cells, with larger nuclei, and more frequent monstrous nuclei and atypical mitotic figures (magnification: a, b 100x; c, d 400x). e, f OCT4 is negative in the parental and resistant cell lines. The brisk mitotic activity and the large number of atypical mitotic figures are present in resistant cells (magnification 400x). g, h Both lines strongly express cytokeratins (pankeratin; magnification 400x). i, j In the MIB-1 staining virtually all nuclei stain positive in the resistant line, whereas in the parental line up to 20% of the nuclei are negative (magnification 400x). k, l Glypican-3 is not convincingly expressed in the parental line, and focally strongly positive in resistant line (magnification 400x). m Only one cell was found unmistakably positive for AFP in the resistant line (magnification 400x), the parental line appears negative for AFP (not shown)

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