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Related Concept Videos

Loss of Tumor Suppressor Gene Functions01:12

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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.
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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.
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Such genes that act...
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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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Tumor Progression02:07

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Tumor progression is a phenomenon where the pre-formed tumor acquires successive mutations to become clinically more aggressive and malignant. In the 1950s, Foulds first described the stepwise progression of cancer cells through successive stages.
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Every normal cell or tissue is embedded in a complex local environment called stroma, consisting of different cell types, a basal membrane, and blood vessels. As normal cells mutate and develop into cancer cells, their local environment also changes to allow cancer progression. The tumor microenvironment (TME) consists of a complex cellular matrix of stromal cells and the developing tumor. The cross-talk between cancer cells and surrounding stromal cells is critical to disrupt normal tissue...
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Early diagnosis and treatment can often cure cancer. However, even with treatment, residual cells called cancer stem cells (CSC) might remain, often causing tumor recurrence. These cancer stem cells possess the potential for self-renewal and multi-lineage differentiation and are often responsible for the therapeutic resistance displayed in most cancers.
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Updated: Jan 30, 2026

Non-Invasive Ultrasound Assessment of Endometrial Cancer Progression in Pax8-Directed Deletion of the Tumor Suppressors Arid1a and Pten in Mice
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The Tumor Suppressor PALB2: Inside Out.

Mandy Ducy1, Laura Sesma-Sanz2, Laure Guitton-Sert2

  • 1CHU de Québec Research Center, Oncology Division, 9 McMahon, Québec City, QC, G1R 3S3, Canada; CHU de Québec Research Center, Endocrinology and Nephrology Division, 2705 Bld Laurier, Québec City, QC, G1V 4G2, Canada; Department of Molecular Biology, Medical Biochemistry and Pathology, Laval University Cancer Research Center, Québec City, QC, G1V 0A6, Canada.

Trends in Biochemical Sciences
|January 15, 2019
PubMed
Summary
This summary is machine-generated.

Partner and Localizer of BRCA2 (PALB2) is crucial for genome stability. Mutations in PALB2 cause Fanconi anemia and increase risks for breast and pancreatic cancers, highlighting its tumor suppressor role.

Keywords:
DNA double-strand break repairFanconi anemiacancerhomologous recombinationtumor suppressor

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Area of Science:

  • Molecular Biology
  • Genetics
  • Cancer Research

Background:

  • Partner and Localizer of BRCA2 (PALB2) is vital for maintaining genome integrity.
  • Biallelic PALB2 mutations lead to Fanconi anemia subtype FA-N.
  • Monoallelic PALB2 mutations are linked to hereditary breast and pancreatic cancers.

Purpose of the Study:

  • To review recent advancements in understanding the regulatory mechanisms of the tumor suppressor PALB2.
  • To elucidate the functional domains of PALB2.
  • To analyze PALB2-associated cancer mutations through functional assays.

Main Methods:

  • Review of recent literature on PALB2 regulation.
  • Analysis of PALB2 functional domains.
  • Functional assays for PALB2-associated cancer mutations.

Main Results:

  • PALB2 regulation involves homodimerization, phosphorylation, and ubiquitylation.
  • Specific functional domains of PALB2 are critical for its tumor suppressor activity.
  • Detailed molecular analysis of cancer-associated PALB2 mutations.

Conclusions:

  • PALB2 is a versatile player in DNA damage response and repair.
  • Dysregulation of PALB2 contributes to cancer development.
  • Understanding PALB2 regulation and mutations is key for cancer therapy.