Related Experiment Video
Updated: Jan 10, 2026
Author Spotlight: Unveiling Transmembrane Protein Family-Related Markers in Gastric Cancer and Implications for Targeted Therapies
Published on: September 15, 2023
Discovery of PAK2 as a Key Regulator of Cancer Stem Cell in Head and Neck Squamous Cell Carcinoma Using Multi-Omic
Puyu Wang1, Shengshan Xu2, Qian Guo1
1Department of Otolaryngology Head and Neck Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China.
Abstract:
Head and neck squamous cell carcinoma (HNSC) is an aggressive malignancy whose progression is closely associated with dysregulation of programed cell death (PCD) pathways and cancer stem cell (CSC) characteristics. To systematically screen for key pathogenic genes, this study performed single-cell analysis on the GSE150321 dataset. The identified cell-specific genes were intersected with PCD- and CSC-related genes, yielding 24 candidate genes for preliminary screening. Further refinement using multiple machine learning (ML) algorithms identified PAK2 as the most central gene among these candidates. Analysis of TCGA and external datasets confirmed that PAK2 is significantly overexpressed in HNSC tissues, demonstrating good diagnostic value and strong association with poor patient prognosis. Functional studies revealed that PAK2 overexpression positively correlates with malignant phenotypes such as metabolic reprograming and tumor metastasis. Notably, PAK2 expression showed a significant negative correlation with antitumor immune status and negatively regulated the infiltration of multiple immune cell types. Spatial transcriptomics and single-cell sequencing analyses revealed PAK2's specific expression patterns within the tumor microenvironment, confirming its influence on the activity of immune-related molecules and immunomodulators. Finally, through Connectivity Map (cMAP) screening and molecular docking, we identified the small molecule compound butein as an effective agent capable of reversing PAK2-mediated procancer molecular features. Butein exhibits stable binding to the PAK2 protein, suggesting its potential as a targeted therapeutic agent. In summary, through multi-omics integration analysis, this study first reveals that PAK2 plays a central role in the pathogenesis of HNSC by regulating PCD, tumor stem cell properties, and the immune microenvironment, and provides a candidate drug for its targeted therapy.
Insights
This study identifies PAK2 as a key gene in head and neck squamous cell carcinoma (HNSC) progression, linking it to cell death, stemness, and immune evasion. Butein emerges as a potential therapeutic agent targeting PAK2 in HNSC.
Area of Science:
- Oncology
- Molecular Biology
- Immunology
Background:
- Head and neck squamous cell carcinoma (HNSC) is aggressive, with progression linked to disrupted programmed cell death (PCD) and cancer stem cell (CSC) traits.
- Identifying key genes driving HNSC pathogenesis is crucial for developing targeted therapies.
Purpose of the Study:
- To systematically screen for pathogenic genes in HNSC using single-cell analysis.
- To identify PAK2 as a central gene involved in HNSC progression and its association with PCD and CSC characteristics.
- To investigate the role of PAK2 in the tumor microenvironment and identify potential therapeutic agents.
Main Methods:
- Single-cell RNA sequencing analysis of HNSC datasets (GSE150321).
- Machine learning algorithms for gene prioritization.
- TCGA and external dataset analysis for gene expression and prognostic value.
- Functional assays for malignant phenotypes, immune infiltration, and spatial transcriptomics.
- Connectivity Map (cMAP) screening and molecular docking for drug discovery.
Main Results:
- PAK2 was identified as a central pathogenic gene in HNSC, significantly overexpressed and associated with poor prognosis.
- PAK2 overexpression correlated with metabolic reprogramming, tumor metastasis, and suppressed antitumor immunity.
- PAK2 influences immune cell infiltration and activity within the tumor microenvironment.
- Butein was identified as a potential therapeutic agent targeting PAK2, showing stable binding and reversing pro-cancer features.
Conclusions:
- PAK2 plays a critical role in HNSC pathogenesis by regulating PCD, CSC properties, and the immune microenvironment.
- PAK2 overexpression is a potential diagnostic and prognostic biomarker for HNSC.
- Butein represents a promising candidate for targeted therapy against PAK2 in HNSC.
More Related Videos
11:28Isolation and Characterization of a Head and Neck Squamous Cell Carcinoma Subpopulation Having Stem Cell Characteristics
Published on: May 11, 2016
11:32Identification of Transcription Factor Regulators using Medium-Throughput Screening of Arrayed Libraries and a Dual-Luciferase-Based Reporter
Published on: March 27, 2020
Related Concept Videos
03:03mTOR Signaling and Cancer Progression
The mTOR pathway or the...
02:23Abnormal Proliferation
02:53Adaptive Mechanisms in Cancer Cells
Some of the advantages that cancer cells have on normal cells include - enhanced ability to divide without terminally differentiating, induce new blood vessel formation,...
02:40Cancer Stem Cells and Tumor Maintenance
Cancer stem cells are thought to originate from tissue-specific normal stem cells or progenitor cells. The normal stem cells usually reside in...
01:19Interactions Between Signaling Pathways
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
01:05Cancer-Critical Genes II: Tumor Suppressor Genes
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...