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Printable Handouts
Navigable Slide Index
- Introduction
- Cancer-centric view
- Issues with the cancer-centric view
- THE CANCER IS SURROUNDED BY THE PATIENT
- The cancer patient
- Tumor Organismal Environment (TOE)
- Overview of the Tumor Microenvironment (TME)
- Plants and their immediate environment
- Differential effects of ECM proteins on actin and focal adhesions
- ECM proteins impact lung metastasis formation
- The in vivo environment accelerates tumorigenesis
- The Tumor Microenvironment (TME)
- Principles of intra-TME interactions
- Heraclitus
- Bidirectional crosstalk
- Principles of intra-TME interactions: Tumor progression
- Tumor progression and regression
- Tumor dormancy
- Principles of intra-TME interactions: Pro- or anti-malignancy functions
- Principles of intra-TME interactions: Hijacking physiological elements
- Tumor cells hijack physiological elements
- Principles of intra-TME interactions: Different tumor microenvironments
- Metastasis kills
- Site-specific metastasis
- Early observations on site-specific metastasis
- Stephen Paget
- The TME shapes the phenotype of the tumor
- The pre-metastatic niche
- Formation of the pre-metastatic niche
- Tumor-derived extracellular vesicles (EVs) and the pre-metastatic organ
- The metastatic cascade (1)
- Regulation of the metastatic cascade
- Epithelial to Mesenchymal Transition (EMT)
- The TME regulates the EMT
- The metastatic cascade (2)
- Intravasation
- Circulating cancer cells interact with platelets
- The role of platelets
- Extravasation
- Extravasation steps of cancer cells
- Selectins and tumor cell rolling
- The functional role of integrins in extravasation
- Integrins involved in the firm adhesion of tumor cells to the endothelium
- Chemokine receptor-mediated migration
- Targeted migration of chemokine receptor-expressing cancer cells
- The fate of tumor cells at metastatic organ sites
- Metastatic-promoting and metastatic-restraining factors
- Metastasis-restraining signals
- The short peptide of human HBB (Metox) inhibits tumor growth
- Metox inhibits neuroblastoma metastasis
- Interactions between tumors and their microenvironment
- Targeting tumor-TME interactions
- 2018 Nobel Prize laureates James Allison & Tasuku Honjo
- Immune checkpoint blocking enables TME-infiltrating T cells to kill tumor cells
- A history of exploring cancer in context
- A rephrased statement of Stephen Paget (IPW)
- Witz Team 2020-2021
- My sincere thanks
Topics Covered
- Tumor Organismal Environment (TOE) and Tumor Microenvironment (TME)
- Principles of intra-TME interactions
- Tumor progression and regression
- Site-specific metastasis
- The pre-metastatic niche
- The metastatic cascade
- Epithelial to Mesenchymal Transition (EMT)
- Targeting tumor-TME interactions
- Immune checkpoint blocking enables TME-infiltrating T cells to kill tumor cells
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Talk Citation
Witz, I.P. (2021, March 31). How tumor-microenvironment interactions drive or inhibit metastasis [Video file]. In The Biomedical & Life Sciences Collection, Henry Stewart Talks. Retrieved December 21, 2024, from https://doi.org/10.69645/TCZM2907.Export Citation (RIS)
Publication History
Financial Disclosures
- Prof. Isaac P. Witz has not informed HSTalks of any commercial/financial relationship that it is appropriate to disclose.
Other Talks in the Series: Periodic Reports: Advances in Clinical Interventions and Research Platforms
Transcript
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0:00
Hello, I'm Professor Isaac Witz,
head of the tumor microenvironment and metastasis research lab at
the Shmunis School of Biomedicine & Cancer Research at Tel Aviv University.
I am going to talk to you about the role of
the microenvironment in the progression of tumor cells towards metastasis.
The tumor microenvironment has become a very extensive research area.
Any single topic touched upon in this presentation would require a separate lecture.
Today's lecture will therefore only be an overview of this multi-disciplinary field.
0:38
To start, let me take you back to the 70s and 80s of the last century.
The cancer research field at that time,
was dominated by the concept that oncogenes and
tumor-suppressor genes are the only and exclusive causes of cancer.
Let me read you one sentence from a paper published in '83 by Michael Bishop,
who together with Harold Varmus was awarded the Nobel Prize for the discovery of oncogenes:
"A common set of cellular genes may help to mediate
the genesis of all tumors, whatever their cause".
Please judge for yourself to what extent you agree with this statement.
1:25
The cancer-centric view did not provide
a satisfactory mechanism for the progression towards metastasis.
Two leading cancer geneticists,
the late Ruth Sager and Bert Vogelstein, raised this important issue.