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Related Concept Videos

Abnormal Proliferation02:23

Abnormal Proliferation

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Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the...
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Cancer-Critical Genes II: Tumor Suppressor Genes01:05

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Genes usually encode proteins necessary for the proper functioning of a healthy cell. Mutations can often cause changes to the gene expression pattern, thereby altering the phenotype.
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
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Loss of Tumor Suppressor Gene Functions01:12

Loss of Tumor Suppressor Gene Functions

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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 damage. Hence, they play an essential role in preventing the proliferation of damaged cells.
When the tumor suppressor genes develop mutations or are lost, cells start growing out of control, leading to cancer. However, a single functional copy of the tumor suppressor gene is enough for the cells to maintain their normal functions and cell...
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Tumor Immunotherapy01:27

Tumor Immunotherapy

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Immunotherapy is a treatment that boosts or manipulates the immune system to fight diseases, including cancer. For instance, by stimulating an immune response through vaccinations against viruses that cause cancers, like hepatitis B virus and human papillomavirus, these diseases can be prevented. Nonetheless, some cancer cells can avoid the immune system due to their rapid mutation and division. The immune response to many cancers involves three phases: elimination, equilibrium, and escape.
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Targeted Cancer Therapies02:57

Targeted Cancer Therapies

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The targeted cancer therapies, also known as “molecular targeted therapies,” take advantage of the molecular and genetic differences between the cancer cells and the normal cells. It needs a thorough understanding of the cancer cells to develop drugs that can target specific molecular aspects that drive the growth, progression, and spread of cancer cells without affecting the growth and survival of other normal cells in the body.
There are several types of targeted therapies against...
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T Cell Types and Functions01:24

T Cell Types and Functions

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When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
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Preparation of Myeloid Derived Suppressor Cells MDSC from Naive and Pancreatic Tumor-bearing Mice using Flow Cytometry and Automated Magnetic Activated Cell Sorting AutoMACS
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Myeloid suppressors decrease melanoma survival by abating tumor-fighting T cells.

Rolf Kiessling1, Yumeng Mao, Yago Pico de Coaña

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Clinical Cancer Research : an Official Journal of the American Association for Cancer Research
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PubMed
Summary
This summary is machine-generated.

Understanding how tumor-specific T cells are inhibited in advanced melanoma is crucial. This knowledge may lead to biomarkers for developing new therapies for this poor-prognosis cancer.

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Area of Science:

  • Oncology
  • Immunology
  • Cancer Research

Background:

  • Disseminated malignant melanoma presents a significant therapeutic challenge with a generally poor prognosis.
  • Current immunotherapies, including cytokine therapy and checkpoint inhibitors, offer prolonged benefits for a subset of patients.
  • Identifying the mechanisms that suppress anti-tumor immune responses is critical for advancing treatment strategies.

Purpose of the Study:

  • To investigate the inhibitory mechanisms targeting tumor-specific T cells in disseminated malignant melanoma.
  • To identify potential biomarkers that can inform the development of more effective therapies for melanoma patients.

Main Methods:

  • The study focused on understanding the molecular and cellular processes that lead to T cell dysfunction in the context of melanoma.
  • Analysis involved evaluating the tumor microenvironment and immune cell interactions.

Main Results:

  • The research elucidated key pathways responsible for inhibiting the activity of T cells crucial for fighting melanoma.
  • Specific molecular signals contributing to immune evasion in melanoma were identified.

Conclusions:

  • Understanding T cell inhibition mechanisms is essential for improving immunotherapy outcomes in melanoma.
  • The findings pave the way for developing novel biomarkers to guide personalized therapeutic approaches for disseminated malignant melanoma.