Formation of intracellular lumina in human prostate carcinoma (DU145) cells, maturation into signet cells, and the cribriform morphology of tumors
| Autor: | James M. Jamison, Omar Faour, Jacques Gilloteaux, Aneil Bhalla |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
Male Pathology medicine.medical_specialty Cellular differentiation Mice Nude Biology intracellular lumina Pathology and Forensic Medicine Glycocalyx 03 medical and health sciences Mice 0302 clinical medicine DU145 Microscopy Electron Transmission Structural Biology signet cell cribriform Cell Line Tumor medicine Animals Humans Cytoskeleton Endoplasm prostate Carcinoma Prostatic Neoplasms Cell Differentiation ultrastructure 030104 developmental biology 030220 oncology & carcinogenesis Cancer cell Cribriform Heterografts Intracellular |
| Zdroj: | Ultrastructural pathology. 40(4) |
| ISSN: | 1521-0758 |
| Popis: | The intracellular or intracytoplasmic lumen (IL) is an enigmatic histological structure that occurs in various tumor cells. A reassessment of diverse ILs fine-structure micrographs obtained out of previous studies encompassing the human prostate carcinoma (DU145) cell line and xenotransplanted carcinomas enabled us to propose aspects of ILs development in cancer cells: a combination of altered expressions in intercellular contacts and their cytoskeletal components would favor a disarray of self-apical polarity orientation; those defects, associated with a local, entwined enriched membranous structures growing as microvilli-like formations out of a disrupted endoplasm and trans-Golgi sorting, create ILs in cells’ perikarya. These misplaced intracytoplasmic domains can become enlarged through spaces made between the finger-like structures by accruing membranes of coalescent intracytoplasmic vesicles then adding microvilli and glycocalyx to constitute ILs. Cationic mucins added with or without a progressive or total loss of microvilli and content generate signet or ring cell, while ILs enlarge. Variable build-ups of these cells’ populations in carcinomas result in architectural mix-up of adjacent cells around these voids, misconstrued as new lumen, and establish a “cribriform” tumor pattern that often implies a poor cancer prognosis. Alternatively, cytotoxic changes caused by anticancer pro-oxidant treatment favor membrane alterations and exaggerate the ILs in xenotransplants into intracellular crypts that accompany other tumor degenerative changes. |
| Databáze: | OpenAIRE |
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