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Capítulo 38

Câncer

O que é o Câncer?
O que é o Câncer?
Cells and tissues must meticulously coordinate their activities for the normal functioning of the human body. Therefore, they exhibit socially ...
Os cânceres se originam de mutações somáticas em uma única célula
Os cânceres se originam de mutações somáticas em uma única célula
Cancer arises from mutations in the critical genes that allow healthy cells to escape cell cycle regulation and acquire the ability to proliferate ...
Progressão Tumoral
Progressão Tumoral
Tumor progression is a phenomenon where the pre-formed tumor acquires successive mutations to become clinically more aggressive and malignant. In the ...
Mecanismos Adaptativos em Células de Câncer
Mecanismos Adaptativos em Células de Câncer
Cancer cells accumulate genetic changes at an abnormally rapid rate due to the defects in the DNA repair mechanisms. From an evolutionary perspective, ...
O Microambiente Tumoral
O Microambiente Tumoral
Every normal cell or tissue is embedded in a complex local environment called stroma, consisting of different cell types, a basal membrane, and blood ...
Metástase
Metástase
Metastasis is the spread of cancer cells from the original site to distant locations in the body. Cancer cells can spread via blood vessels (hematogenous) ...
Genes críticos para o câncer I: Proto-oncogenes
Genes críticos para o câncer I: Proto-oncogenes
Genes usually encode proteins necessary for the proper functioning of a healthy cell. Mutations can often cause changes to the gene expression pattern, ...
Genes críticos para o câncer II: Genes Supressores de Tumor
Genes críticos para o câncer II: Genes Supressores de Tumor
Genes usually encode proteins necessary for the proper functioning of a healthy cell. Mutations can often cause changes to the gene expression pattern, ...
Perda das Funções de Gene Supressor Tumoral
Perda das Funções de Gene Supressor Tumoral
Tumor suppressor genes are normal genes that can slow down cell division, repair DNA mistakes, or program the cells for apoptosis in case of irreparable ...
O Gene Retinoblastoma
O Gene Retinoblastoma
Tumor suppressor genes are normal genes that can slow down cell division, repair DNA mistakes, or program the cells for apoptosis in case of irreparable ...
Mecanismos de cânceres induzidos por retrovírus
Mecanismos de cânceres induzidos por retrovírus
Retroviruses are RNA viruses that have been shown to cause cancers in diverse species, including chickens, mice, cats, and monkeys. The RNA genomes of ...
Vírus do sarcoma de Rous (RSV) e Câncer
Vírus do sarcoma de Rous (RSV) e Câncer
Rous Sarcoma virus or RSV was discovered by F. Peyton Rous in the year 1911 as a filterable transmissible agent that could cause tumors in chickens. He ...
O Gene Ras
O Gene Ras
The Ras-gene-encoded proteins are regulators of signaling pathways controlling cell proliferation, differentiation, or cell survival. The Ras-gene family ...
Via de Sinalização mTOR e Progressão do Câncer
Via de Sinalização mTOR e Progressão do Câncer
The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a ...
Células Tronco Tumorais e Manutenção Tumoral
Células Tronco Tumorais e Manutenção Tumoral
Early diagnosis and treatment can often cure cancer. However, even with treatment, residual cells called cancer stem cells (CSC) might remain, often ...
Modelos Murinos para Estudo do Câncer
Modelos Murinos para Estudo do Câncer
Mice have long served as models for studying human biology and pathology because of their phylogenetic and physiological similarity with humans. They are ...
Prevenção do Câncer
Prevenção do Câncer
Several factors can increase the risk of cancer in an individual. About 50% of cancer cases can be prevented by adopting a healthy lifestyle, regular ...
Terapias para o Câncer
Terapias para o Câncer
Cancer therapies are various modes of treatment, such as surgery, radiation therapy, and chemotherapy that are administered to cancer patients. However, ...
Terapias direcionadas para tratamento do Câncer
Terapias direcionadas para tratamento do Câncer
The targeted cancer therapies, also known as “molecular targeted therapies,” take advantage of the molecular and genetic differences between ...
Tratamento para Cânceres Resistentes
Tratamento para Cânceres Resistentes
Cancer is the second leading cause of death in the United States. A cancer cell is genetically unstable and hence can mutate faster. They can also modify ...
Terapias Combinadas e Medicina Personalizada
Terapias Combinadas e Medicina Personalizada
Combining two or more treatment methods increases the life span of cancer patients while reducing damage to vital organs or tissue from the overuse of a ...
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