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Nesprin-1 impact on tumorigenic cell phenotypes.

Ilknur Sur-Erdem1,2,3,4, Muhammed Sajid Hussain5,6,7, Maria Asif5,6,7

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Nesprin-1 overexpression can reverse malignant phenotypes in human liver cancer cells. Restoring Nesprin-1 levels corrects nuclear shape, protein localization, and DNA damage, suggesting potential therapeutic applications for liver cancer.

Keywords:
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Area of Science:

  • Cell biology
  • Molecular biology
  • Cancer research

Background:

  • Nesprin-1 is the largest nuclear envelope protein, crucial for NE structure and function.
  • Reduced Nesprin-1 levels, due to SYNE1 gene mutations, are linked to age-related diseases and cancer.
  • Huh7 cells exhibit malignant phenotypes, including altered nuclear shape and genome instability, linked to low Nesprin-1.

Purpose of the Study:

  • To investigate if Nesprin-1 overexpression can reverse the malignant phenotype of Huh7 human liver cancer cells.
  • To assess the impact of Nesprin-1 restoration on nuclear shape, NE component localization, centrosome positioning, and genome stability.

Main Methods:

  • Ectopic expression of a mini-Nesprin-1 construct in Huh7 cells.
  • Analysis of nuclear shape, NE protein localization, and centrosome positioning.
  • Evaluation of DNA damage response network alterations and cellular senescence.

Main Results:

  • Nesprin-1 overexpression improved nuclear shape and corrected mislocalization of nuclear envelope proteins.
  • Restored Nesprin-1 normalized centrosome positioning and DNA damage response alterations.
  • Nesprin-1 expression significantly impacted cellular senescence.

Conclusions:

  • Nesprin-1 plays a critical role in maintaining nuclear envelope integrity and genome stability.
  • Nesprin-1 overexpression demonstrates potential for correcting tumorigenic phenotypes in human liver cancer.
  • Targeting Nesprin-1 may offer a novel therapeutic strategy for liver cancer treatment.