Tumor suppressor interactions with microtubules: keeping cell polarity and cell division on track

Paula Hernandez1, Jennifer S Tirnauer

  • 1Center for Molecular Medicine and Neag Comprehensive Cancer Center, University of Connecticut Health Center, Farmington, CT 06030-3101, USA.

Insights

Tumor suppressor proteins stabilize microtubules, preventing cancer. Their disruption contributes to tumor development, but how they influence cell fate and chemotherapy response needs further study.

Area of Science:

  • Cell Biology
  • Cancer Biology
  • Molecular Oncology

Background:

  • Tumor suppressor proteins are crucial for preventing malignant transformation.
  • Many tumor suppressors interact with the cellular microtubule cytoskeleton.
  • Disruption of microtubule functions is implicated in cancer progression.

Purpose of the Study:

  • To review interactions between tumor suppressors and microtubules.
  • To explore the role of microtubule-dependent processes in cancer.
  • To speculate on the implications of these interactions for tumorigenesis.

Main Methods:

  • Literature review and synthesis of existing research.
  • Focus on specific tumor suppressor proteins and their microtubule interactions.
  • Speculative analysis of functional consequences.

Main Results:

  • Several tumor suppressors stabilize microtubules.
  • These proteins organize microtubule arrays.
  • These functions are likely critical for preventing cancer.

Conclusions:

  • Tumor suppressors play a vital role in maintaining microtubule stability, crucial for preventing cancer.
  • The precise mechanisms linking tumor suppressors, microtubule stability, and cell fate require further investigation.
  • Understanding these interactions could inform cancer therapy, particularly anti-microtubule drug responses.

Related Concept Videos

Abnormal Proliferation02:23

Abnormal Proliferation

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 daughter...
Drugs that Stabilize Microtubules01:15

Drugs that Stabilize Microtubules

Microtubules are dynamic structures that undergo cycles of catastrophe and rescue. The microtubules play a central role in cell division by forming the spindle apparatus for segregating the chromosomes. This makes them ideal targets for regulating dividing cells in tumors and malignant cancer cells. Microtubule stabilizing drugs help stabilize the microtubule formation and promote its polymerization. Paclitaxel was the first microtubule stabilizing agent used as anticancer drug in chemotherapy...
Microtubule Instability02:17

Microtubule Instability

Microtubules are hollow cylindrical filaments having a diameter of approximately 25 nm and a length that varies from 200 nm to 25 μm. GTP-bound tubulin subunits form αβ-heterodimers for microtubule assembly. These core building blocks interact longitudinally, polymerizing into protofilaments. The protofilaments then interact with one another through lateral bonding forces to form stable cylindrical microtubules. These cylindrical filaments are dynamic as they undergo repeated assembly and...
Microtubule Instability02:17

Microtubule Instability

Microtubules are hollow cylindrical filaments having a diameter of approximately 25 nm and a length that varies from 200 nm to 25 μm. GTP-bound tubulin subunits form αβ-heterodimers for microtubule assembly. These core building blocks interact longitudinally, polymerizing into protofilaments. The protofilaments then interact with one another through lateral bonding forces to form stable cylindrical microtubules. These cylindrical filaments are dynamic as they undergo repeated assembly and...
Loss of Tumor Suppressor Gene Functions01:12

Loss of Tumor Suppressor Gene Functions

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...
Loss of Tumor Suppressor Gene Functions01:12

Loss of Tumor Suppressor Gene Functions

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...