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Related Concept Videos

Cancer-Critical Genes II: Tumor Suppressor Genes01:05

Cancer-Critical Genes II: Tumor Suppressor Genes

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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.
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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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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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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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Synaptopodin-2: a potential tumor suppressor.

Zequn Zheng1,2, Yongfei Song3,4,5

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Synaptopodin 2 (SYNPO2) acts as a tumor suppressor in many cancers, influencing autophagy and signaling pathways. Its expression levels and modifications are linked to cancer progression and patient outcomes.

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Area of Science:

  • Oncology
  • Molecular Biology
  • Cell Biology

Background:

  • Synaptopodin 2 (SYNPO2) was initially identified as an actin-binding protein with a PZD domain, primarily found in muscular tissues.
  • Emerging research indicates SYNPO2 has diverse roles in cancer beyond its structural function, often acting as a tumor suppressor.

Purpose of the Study:

  • To review the multifaceted roles of SYNPO2 in cancer.
  • To explore SYNPO2's involvement in cancer generation, epigenetic modifications, subcellular localization, and biological functions.

Main Methods:

  • Literature review of studies on SYNPO2 in various cancers.
  • Analysis of SYNPO2's impact on cellular processes like autophagy and signaling pathways.
  • Examination of SYNPO2's correlation with clinical outcomes, including prognosis and diagnosis.

Main Results:

  • High SYNPO2 expression generally correlates with a good prognosis in most cancers.
  • SYNPO2 influences autophagy (mitophagy, chaperone-mediated autophagy) and activates PI3K/AKT/mTOR and Hippo signaling pathways.
  • SYNPO2's subcellular localization, promoter methylation, and SNPs are associated with cancer progression.

Conclusions:

  • SYNPO2 is a significant tumor suppressor with diverse functions in cancer.
  • SYNPO2's expression, modifications, and localization offer potential as diagnostic and prognostic biomarkers.