Hypoxia-driven changes in nuclear morphology as a determinant of cell migration

Area of Science:

• Oncology
• Biophysics
• Cell Biology

Background:

• Metastatic pancreatic cancer exhibits severe hypoxia and resistance to therapies.
• Novel treatment strategies are urgently needed to combat pancreatic cancer progression.

Purpose of the Study:

• To investigate how hypoxia-mimetic conditions influence pancreatic cancer cell invasion by altering cellular and nuclear mechanics.
• To identify potential therapeutic targets by understanding the biophysical adaptations of cancer cells under hypoxia.

Main Methods:

• Microscopic imaging, atomic force microscopy, and mass spectrometry were employed.
• Analysis of cellular morphology, nuclear attributes (size, stiffness), and molecular changes (lamin A, lipidome, proteome) under hypoxia-mimetic conditions.

Main Results:

• Hypoxia reduced cell spread area, increased filopodia, and decreased actin anisotropy, enhancing migration.
• Nuclear size and stiffness decreased, with reduced lamin A expression, increasing deformability.
• Nuclear envelope wrinkling, altered nuclear lipidome/proteome, and decreased LINC proteins were observed, correlating with mechanical changes.

Conclusions:

• Hypoxia induces a mechanoadaptive response in pancreatic cancer cells, linking biophysical remodeling to metastatic potential.
• Targeting mechanical properties presents a novel therapeutic avenue to inhibit pancreatic cancer cell migration and reduce metastasis.