Lecture

Sustained Proliferation: Signaling Pathways and Cancer Genes

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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 introduces the core hallmark capability of sustaining proliferation in cancer cells, focusing on growth factors, receptor tyrosine kinases, and signal transduction pathways. It covers the discovery of growth factors, autocrine signaling in cancer cells, and the role of viral oncogenes. The lecture explores different modes of growth factor signaling, the similarities between growth factor receptors and viral oncoproteins, and the therapeutic opportunities targeting receptor tyrosine kinases. It also delves into the mechanisms of RTK phosphorylation, the recruitment of partner proteins, and the activation of Ras. Additionally, it discusses genetic screening for RTK signal transduction components and the implications of oncogenic mutations in the Ras pathway.

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: Cell signaling, Cancer

Related concepts (31)

Cell signaling

In biology, cell signaling (cell signalling in British English) or cell communication is the ability of a cell to receive, process, and transmit signals with its environment and with itself. Cell signaling is a fundamental property of all cellular life in prokaryotes and eukaryotes. Signals that originate from outside a cell (or extracellular signals) can be physical agents like mechanical pressure, voltage, temperature, light, or chemical signals (e.g., small molecules, peptides, or gas).

Autocrine signaling

Autocrine signaling is a form of cell signaling in which a cell secretes a hormone or chemical messenger (called the autocrine agent) that binds to autocrine receptors on that same cell, leading to changes in the cell. This can be contrasted with paracrine signaling, intracrine signaling, or classical endocrine signaling. An example of an autocrine agent is the cytokine interleukin-1 in monocytes. When interleukin-1 is produced in response to external stimuli, it can bind to cell-surface receptors on the same cell that produced it.

Cancer research

Cancer research is research into cancer to identify causes and develop strategies for prevention, diagnosis, treatment, and cure. Cancer research ranges from epidemiology, molecular bioscience to the performance of clinical trials to evaluate and compare applications of the various cancer treatments. These applications include surgery, radiation therapy, chemotherapy, hormone therapy, immunotherapy and combined treatment modalities such as chemo-radiotherapy.

Cancer epigenetics

Cancer epigenetics is the study of epigenetic modifications to the DNA of cancer cells that do not involve a change in the nucleotide sequence, but instead involve a change in the way the genetic code is expressed. Epigenetic mechanisms are necessary to maintain normal sequences of tissue specific gene expression and are crucial for normal development. They may be just as important, if not even more important, than genetic mutations in a cell's transformation to cancer.

Wnt signaling pathway

The Wnt signaling pathways are a group of signal transduction pathways which begin with proteins that pass signals into a cell through cell surface receptors. The name Wnt is a portmanteau created from the names Wingless and Int-1. Wnt signaling pathways use either nearby cell-cell communication (paracrine) or same-cell communication (autocrine). They are highly evolutionarily conserved in animals, which means they are similar across animal species from fruit flies to humans.

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