Nanopore-related cellular death through cytoskeleton depolymerization by drug-induced ROS.

Area of Science:

• Oncology
• Nanotechnology
• Cell Biology

Background:

• Prostate cancer (PCa) is a prevalent malignancy with ongoing research into drug efficacy and mechanisms.
• Current treatment strategies require further exploration of drug-cell interactions at the molecular level.

Purpose of the Study:

• To investigate the anti-cancer mechanisms of paclitaxel (PTX) on prostate cancer cells using atomic force microscopy (AFM).
• To explore the role of reactive oxygen species (ROS) in PTX-induced cellular damage and membrane alterations.

Main Methods:

• Utilized AFM to visualize morphological changes on PC3M cell membranes after PTX treatment.
• Quantified pore formation in terms of diameter, depth, and number in a concentration- and time-dependent manner.
• Investigated the involvement of ROS by using a ROS scavenger and assessing its effect on pore formation.

Main Results:

• AFM revealed the formation of pore-like structures on PC3M cell membranes following paclitaxel treatment.
• Pore formation exhibited a concentration- and time-dependent relationship with PTX exposure.
• Reactive oxygen species were identified as key mediators in depolymerizing the actin cytoskeleton, leading to membrane damage and pore induction.
• Pretreatment with a ROS scavenger effectively inhibited paclitaxel-induced pore formation.

Conclusions:

• AFM provides a novel nanoscale imaging method for evaluating drug effects on cancer cells.
• Paclitaxel induces cell membrane damage through ROS-mediated mechanisms, involving actin cytoskeleton depolymerization.
• This research offers a new perspective on drug-targeted therapy evaluation for prostate cancer.