A panel of markers for identification of malignant and non-malignant cells in culture from effusions

Abstract

The aim of the present study was to identify cell types in primary culture from malignant and non-malignant effusions. Effusion samples were subjected to cytology and culture. Immunocytochemistry was performed in cytological slides to evaluate malignancy (positivity for malignancy markers) and in culture slides for identification of cell types in growth. A total of 143 effusion samples (pleural n=76; peritoneal n=37; pericardial n=4; and peritoneal lavage n=26) were analyzed. Cell growth was observed in 34.9% of all samples and immunocytochemistry for identification of cell types in culture slides was conclusive in 90% of them. In non-malignant samples (n=28), growth of mesothelial cells, macrophages and of both cell types was identified in 82.14, 10.71 and 7.14%, respectively. In malignant samples (n=17, all carcinomas), growth of malignant epithelial cells and of both malignant epithelial and mesothelial cells was identified in 41.17 and 23.52%, respectively. In the remaining 35.29% of malignant samples, the only cells in growth were mesothelial and/or macrophages instead of malignant epithelial cells. In conclusion, in culture of malignant effusions, mesothelial cells may be simultaneously identified with malignant epithelial cells. Besides, mesothelial cells and macrophages may be the only cells identified in malignant effusion culture. Therefore, a broad panel of cell markers should be used for unmistakable identification of cells in studies of effusion primary culture. The ideal malignant effusion sample to obtain culture of neoplastic cells should be that without the presence of mesothelial cells and macrophages.

Identification and implication of tissue-enriched ligands in epithelial–endothelial crosstalk during pancreas development

“…Finally, two populations of endocrine cells (clusters 2 and 3) contained high levels of Pax4, insulin and glucagon transcripts, respectively 31,32 . Mesenchymal cells (clusters 4-6) expressed the marker Col1a1 33 , and two subpopulations out of the three identified expressed the mesothelial markers Wt1 and Upk3b 34,35 . We also found two immune subpopulations (clusters 8 and 9), and neuronal (cluster 10) and erythrocyte (cluster 11) progenitors, as already observed in mouse at later stages and in human 23,36,37 .…”

Identification and implication of tissue-enriched ligands in epithelial-endothelial crosstalk during pancreas development

“…Finally, two populations of endocrine cells (clusters 2 and 3) contained high levels of Pax4 , insulin and glucagon transcripts, respectively[26,27]. Mesenchymal cells (clusters 4-6) expressed the marker Col1a1 [28], and two subpopulations out of the three identified expressed the mesothelial markers Wt1 and Upk3b [29,30]. We also found two immune subpopulations (clusters 8 and 9), and neuronal (cluster 10) and erythrocyte (cluster 11) progenitors, as already observed in mouse at later stages and in human[18,31,32].…”

Using patient-derived organoids to predict locally advanced or metastatic lung cancer tumor response: A real-world study

“… 50 However, an MSE consists primarily of tumor cells rather than non-malignant epithelial or mesothelial cells and can be obtained by a relatively minimally invasive manner. 51 Therefore, LCOs derived from MSE tend to be purer tumor organoids, allowing these models to be excellent candidates for DST. LCOs derived from either tissue or MSE samples faithfully reflected the pathological and molecular characteristics of the original tumor, and these results provided a reliable basis for the subsequent DST.…”