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Lecture

Genetic Instability: De Palma

In course

BIO-392: Oncology

This course provides a comprehensive overview of the biology of cancer, including common mechanisms that cancer cells use to grow and disseminate in humans and in animal models. ...

Description

This lecture covers genetic instability in cancer, discussing the multi-step progression in various cancer types, the role of mutagens, and the repair mechanisms of mutated DNA. It also explores the impact of genetic instability on tumor progression and the identification of cancer stem cells.

Instructors (2)

Daniel Constam

Daniel Constam received his doctoral degree in Natural Sciences from ETH Zürich in the neuroimmunology group of Adriano Fontana (1993). For postdoctoral studies, he joined the laboratory of Elizabeth Robertson as an EMBO fellow at Harvard University to characterize proprotein convertase (PC) functions in mouse models of early embryogenesis (1994-1999). As an ISREC group leader (>2000) and Associate Professor at EPFL (>2007), he initially continued to study pluripotency and lineage differentiation during development and found that several secreted PCs jointly regulate cell-cell adhesion and TGFβ signaling pathways at the cross-roads of stem cell and cancer biology. To map the proteolytic activity of PCs and their relative distribution in exocytic or endocytic vesicles, his lab developed PC-specific FRET sensors for high resolution live imaging in normal cells and in tumour-host interactions. His studies on TGFβ signaling also identified the RNA-binding protein Bicc1 and its self-polymerization in membrane-less organelles as regulators of mRNA translation and cell metabolism that cooperate with primary cilia to prevent cystic growth in renal tubules and in pancreatic and bile ducts.

Michele De Palma

Official source

Ontological neighbourhood

Biology

Cell biology: Cancer

Related concepts (32)

DNA repair

DNA repair is a collection of processes by which a cell identifies and corrects damage to the DNA molecules that encode its genome. In human cells, both normal metabolic activities and environmental factors such as radiation can cause DNA damage, resulting in tens of thousands of individual molecular lesions per cell per day. Many of these lesions cause structural damage to the DNA molecule and can alter or eliminate the cell's ability to transcribe the gene that the affected DNA encodes.

Cancer stem cell

Cancer stem cells (CSCs) are cancer cells (found within tumors or hematological cancers) that possess characteristics associated with normal stem cells, specifically the ability to give rise to all cell types found in a particular cancer sample. CSCs are therefore tumorigenic (tumor-forming), perhaps in contrast to other non-tumorigenic cancer cells. CSCs may generate tumors through the stem cell processes of self-renewal and differentiation into multiple cell types.

Cancer

Cancer is a group of diseases involving abnormal cell growth with the potential to invade or spread to other parts of the body. These contrast with benign tumors, which do not spread. Possible signs and symptoms include a lump, abnormal bleeding, prolonged cough, unexplained weight loss, and a change in bowel movements. While these symptoms may indicate cancer, they can also have other causes. Over 100 types of cancers affect humans. Tobacco use is the cause of about 22% of cancer deaths.

Stem cell

In multicellular organisms, stem cells are undifferentiated or partially differentiated cells that can differentiate into various types of cells and proliferate indefinitely to produce more of the same stem cell. They are the earliest type of cell in a cell lineage. They are found in both embryonic and adult organisms, but they have slightly different properties in each. They are usually distinguished from progenitor cells, which cannot divide indefinitely, and precursor or blast cells, which are usually committed to differentiating into one cell type.

Adult stem cell

Adult stem cells are undifferentiated cells, found throughout the body after development, that multiply by cell division to replenish dying cells and regenerate damaged tissues. Also known as somatic stem cells (from Greek σωματικóς, meaning of the body), they can be found in juvenile, adult animals, and humans, unlike embryonic stem cells. Scientific interest in adult stem cells is centered around two main characteristics.

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