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Updated: Jun 11, 2026

Spectrophotometric Screening for Potential Inhibitors of Cytosolic Glutathione S-Transferases
Published on: October 10, 2020
Transglutaminase 2: a multi-tasking protein in the complex circuitry of inflammation and cancer
Kapil Mehta1, Aupam Kumar, Hong Im Kim
1Department of Experimental Therapeutics, The University of Texas M. D. Anderson Cancer Center, Houston, TX 77030, USA. kmehta@mdanderson.org
Abstract:
Metastasis of primary tumors to distant sites and their inherent or acquired resistance to currently available therapies pose major clinical challenge to the successful treatment of cancer. The identification of tumor-coded genes and how they contribute to the progression of cancer is required to improve patient outcomes. Recently, cells that have undergone the epithelial-mesenchymal transition (EMT), which share characteristics with cancer stem cells (CSC) have been implicated to play a role in drug resistance and metastasis of several types of cancer. In this review, we discuss the relationship among transglutaminase 2 (TG2), the EMT, and CSCs in inflammation and cancer. TG2 is a structurally and functionally complex protein implicated in such diverse processes as tissue fibrosis, wound healing, apoptosis, neurodegenerative disorders, celiac disease, atherosclerosis and cancer. Depending on the cellular context, TG2 can either promote or inhibit cell death. Increased expression of TG2 in several types of cancer cells has been associated with increased cell invasiveness, cell survival and decreased survival of patients with cancer. Down-regulation of TG2 by small interfering RNA (siRNA) or its inhibition by small molecule inhibitors has been shown to significantly enhances the therapeutic efficacy of anticancer drugs and inhibit metastatic spread. In addition, TG2-regulated pathways are involved in promoting or protecting normal and tumor cells from death-induced signaling. We discuss the contribution of TG2-regulated pathways to the development of drug resistance and progression to metastatic disease and the therapeutic potential of TG2 for treating advanced-stage cancer.
Insights
Transglutaminase 2 (TG2) plays a key role in cancer progression, drug resistance, and metastasis. Inhibiting TG2 can enhance cancer therapy effectiveness and reduce cancer spread.
Area of Science:
- Oncology
- Molecular Biology
- Biochemistry
Background:
- Cancer metastasis and drug resistance are significant clinical challenges.
- Epithelial-mesenchymal transition (EMT) and cancer stem cells (CSCs) are linked to metastasis and drug resistance.
- Transglutaminase 2 (TG2) is a multifunctional protein involved in various cellular processes, including cancer.
Purpose of the Study:
- To review the relationship between TG2, EMT, and CSCs in cancer.
- To discuss the role of TG2 in inflammation and cancer progression.
- To explore the therapeutic potential of targeting TG2 in advanced-stage cancer.
Main Methods:
- Literature review focusing on TG2, EMT, CSCs, inflammation, and cancer.
- Analysis of studies investigating TG2 expression and its association with cancer invasiveness and patient survival.
- Examination of research on TG2 inhibition (siRNA, small molecule inhibitors) and its effects on therapeutic efficacy and metastasis.
Main Results:
- Increased TG2 expression correlates with enhanced cancer cell invasiveness, survival, and reduced patient survival.
- Down-regulation or inhibition of TG2 improves the efficacy of anticancer drugs and inhibits metastatic spread.
- TG2-regulated pathways influence cell death signaling, contributing to drug resistance and metastatic progression.
Conclusions:
- TG2 is a critical mediator in cancer progression, drug resistance, and metastasis.
- Targeting TG2 presents a promising therapeutic strategy for advanced-stage cancers.
- Understanding TG2's role in EMT and CSCs is crucial for developing effective cancer treatments.
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