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Published on: June 10, 2014
Impact of PSMD2 on Gastric Cancer Tissue Stiffness Investigated via Motor-Piezoceramic Coupled Atomic Force
Yixiao Xia1,2, Junkai Jia3, Hongying Ma3
1State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, China.
Abstract:
Gastric cancer is one of the deadliest malignant tumors of the digestive tract, and its development and metastasis are regulated by various factors. Some studies have shown that PSMD2 is involved in cancer development by regulating the tumor microenvironment stiffness. However, the exact mechanism is unclear, and effective means to quantify the effect of PSMD2 on gastric cancer tissue hardness are lacking. Herein, we revealed the mechanical heterogeneity of tumor tissues in gastric cancer patients using a large-scale AFM-based in situ method. Gastric cancer cryosections were probed by this method under aqueous condition. The in situ fluorescence images were measured to correlate tissue stiffness with PSMD2 expression. Experimental results clearly revealed the specific distribution of mechanics in gastric cancer tissues under differences in PSMD2 expression. The study unveils the effect of PSMD2 expression levels on cancer invasion and increased matrix stiffness, providing a novel insight into gastric cancer research.
Insights
This study quantifies how PSMD2 affects gastric cancer tissue hardness using AFM. Higher PSMD2 expression correlates with increased matrix stiffness and potential cancer invasion.
Area of Science:
- Oncology
- Biophysics
- Materials Science
Background:
- Gastric cancer is a lethal digestive tract malignancy with complex development and metastasis.
- PSMD2's role in cancer is linked to tumor microenvironment stiffness, but mechanisms remain unclear.
- Quantifying PSMD2's effect on gastric cancer tissue hardness is needed.
Purpose of the Study:
- To reveal the mechanical heterogeneity of gastric cancer tissues.
- To investigate the correlation between PSMD2 expression and tissue stiffness.
- To understand the impact of PSMD2 on gastric cancer invasion and matrix stiffness.
Main Methods:
- Employed a large-scale Atomic Force Microscopy (AFM)-based in situ method.
- Probed gastric cancer cryosections under aqueous conditions.
- Correlated in situ fluorescence images of tissue stiffness with PSMD2 expression levels.
Main Results:
- Demonstrated distinct mechanical distributions within gastric cancer tissues based on PSMD2 expression.
- Showcased the ability to quantify PSMD2's effect on tissue hardness.
- Identified specific mechanical variations linked to differing PSMD2 expression levels.
Conclusions:
- PSMD2 expression significantly influences the mechanical properties of gastric cancer tissues.
- Elevated PSMD2 levels are associated with increased matrix stiffness and potential cancer invasion.
- Provides novel insights into the mechanical regulation of gastric cancer progression.
