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1.
Bull Cancer ; 105(1): 25-34, 2018 Jan.
Artigo em Francês | MEDLINE | ID: mdl-29224886

RESUMO

The recognition that solid tumors are complex entities composed of the tumor cell mass itself and a stromal micro-environnement providing a variety of cells from the host (fibroblasts, endothelial cells, immune cells) led to recognize that this heterogeneity could not be recapitulated in vitro by conventional bidimensional (2-D) cultures. This justified numerous attempts to develop tridimensional (3-D) cultures that provided better tools for approaching tumor complexity and more convincing drug testing systems. Among various 3-D technologies, tumor spheroids are more likely suited to provide in vitro platforms for apprehending specific aspects of different processes specifically defining each tumor category as well as testing drug delivery systems. This review summarizes current features of multicellular tumor spheroids and their suitability for studying different aspects of cancer cell biology, patient-specific therapies and drug treatment.


Assuntos
Neoplasias/patologia , Esferoides Celulares/patologia , Microambiente Tumoral , Antineoplásicos/uso terapêutico , Movimento Celular , Proliferação de Células , Humanos , Neoplasias/irrigação sanguínea , Neoplasias/tratamento farmacológico , Neoplasias/imunologia , Neovascularização Patológica
12.
Bull Cancer ; 100(7-8): 697-713, 2013.
Artigo em Francês | MEDLINE | ID: mdl-23747694

RESUMO

The second half of the 20th century has been dominated by genetic models of tumors that provided conceptual tools explaining tumor genesis and its evolution. Other domains--epigenetics, cell metabolism--appeared that generated a more complex landscape of tumor physiopathology. Moreover, the discovery of tumor stem cells and intratumoral heterogeneity are likely to explain recurrence. A major difficulty is that every tumor behaves as an organ that evolves in function of its microenvironment. By integrating all the new data in more and more sophisticated models, the major goals may emerge from the characterisation of new markers for diagnosis and prognosis and from the selection of pertinent and efficient new therapeutic targets.


Assuntos
Modelos Genéticos , Neoplasias/genética , Epigênese Genética/genética , Predisposição Genética para Doença/genética , Genoma Humano/genética , Histonas/genética , Histonas/metabolismo , Humanos , Mutação/genética , Recidiva Local de Neoplasia/patologia , Neoplasias/patologia , Células-Tronco Neoplásicas , Medicina de Precisão , RNA não Traduzido/genética , Microambiente Tumoral
13.
Bull Cancer ; 100(6): 555-60, 2013 Jun.
Artigo em Francês | MEDLINE | ID: mdl-23719507

RESUMO

From the second part of the 20th century, our knowledge of tumor biology widely benefited of tremendous progress in genetics (oncogenes, tumor suppressor genes, chromosomal abnormalities, etc), then in complex epigenetic process that regulates gene expression. Other players have entered the field of oncology and are now considered for their potential therapeutic interest: energetic metabolism, cancer stem cells as sources of tumor recurrence, microenvironment and above all intratumor heterogeneity. A better understanding of these domains of fundamental oncology should not mask the notion that a tumor is a living entity, which obeys the rules of Darwinian evolution.


Assuntos
Neoplasias , Transformação Celular Neoplásica/genética , Metabolismo Energético/fisiologia , Epigênese Genética/genética , Regulação Neoplásica da Expressão Gênica/genética , Humanos , Neoplasias/genética , Neoplasias/metabolismo , Neoplasias/patologia , Neoplasias/terapia , Células-Tronco Neoplásicas/patologia , Microambiente Tumoral/fisiologia
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