20.500.12556/DKUM-87064 Morphological and immunocytochemical characterization of tumor spheroids in ascites from high-grade serous carcinoma Tumor spheroids in the ascites of high-grade serous carcinoma (HGSC) are poorly described. Our objective was to describe their morphological features, cellular composition, PD-1 and PD-L1 expression, and survival correlation of these parameters. The density and size of spheroids were assessed in Giemsa-stained smears; the cell composition of spheroids, including tumor cells, immune cells, capillaries, and myofibroblasts, as well as PD-1 and PD-L1 expression on tumor and immune cells was assessed in immunocytochemically stained cell block sections. Forty-seven patients with primary HGSC and malignant ascites were included. A cut-off value for a spheroid density of 10% was established, which significantly predicted overall survival. However, spheroid size did not correlate with survival outcomes. Spheroids were primarily composed of tumor cells, but the presence of lymphocytes and macrophages was also confirmed. Moreover, capillaries were present in the spheroids of three patients, but the presence of myofibroblasts was not confirmed. PD-1 was expressed on lymphocytes but not on tumor cells. PD-L1 expression was seen on both tumor and immune cells, assessed by 22C3 and SP263 antibody clones but not by the SP142 clone. Our results highlight the potential of routine cytopathological techniques to analyze spheroids in HGSC ascites as a valuable tool to investigate their potential as prognostic markers. ascites cell blocks high-grade serous carcinoma ovarian carcinoma spheroids spheroid-associated immune cells PD-1 PD-L1 maligne celice visokomaligni rak rak jajčnikov sferoidi imunske celice true false true MDPI Angleški jezik Slovenski jezik Znanstveno delo 2024-02-14 13:07:12 2024-02-14 13:53:31 2024-02-15 03:11:30 0000-00-00 00:00:00 2023 0 0 Str. 1-14 Št. 19, št. članka 2390 Letn. 12 2023 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2023-08-28 2023-09-28 2023-09-30 618.1 167619075 10.3390/cells12192390 2073-4409 Miceska-2023-Morphological_and_Immunocytochemi.pdf Miceska-2023-Morphological_and_Immunocytochemi.pdf 1 D4F84F83B9F6B650C9CB669B2AEDB598 eca48bf52883b134b66eba543482c408bd4d320c55dcd0a1f421fe56a3c2d033 5db8b73c-cb33-11ee-9f39-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=176144 https://doi.org/10.3390/cells12192390 0 963213c7-cb31-11ee-9f39-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=176142 Medicinska fakulteta 0 0 0