C-X-C Motif Chemokine Ligand 14 is a Unique Multifunctional Regulator of Tumor Progression
Xiao-Yan Yang1,2,3, Shigeyuki Ozawa4,5, Yasumasa Kato6
1Oral Health Science Research Center, Graduate School of Kanagawa Dental University, Yokosuka 238-8580, Japan. yang@kdu.ac.jp.
Abstract:
Cancer is a leading cause of death and disease worldwide, with a tremendous financial impact. Thus, the development of cost-effective novel approaches for suppressing tumor growth and progression is essential. In an attempt to identify the mechanisms responsible for tumor suppression, we screened for molecules downregulated in a cancer progression model and found that the chemokine CXCL14, also called BRAK, was the most significantly downregulated. Increasing the production of CXCL14 protein by transfecting tumor cells with a CXCL14 expression vector and transplanting the cells into the back skin of immunodeficient mice suppressed tumor cell growth compared with that of parental tumor cells, suggesting that CXCL14 suppressed tumor growth in vivo. However, some studies have reported that over-expression of CXCL14, especially in stromal cells, stimulated the progression of tumor formation. Transgenic mice expressing 10-fold more CXCL14 protein than wild-type C57BL/6 mice showed reduced rates of chemical carcinogenesis, transplanted tumor growth, and metastasis without apparent side effects. CXCL14 also acts as an antimicrobial molecule. In this review, we highlight recent studies involving the identification and characterization of CXCL14 in cancer progression and discuss the reasons for the context-dependent effects of CXCL14 on tumor formation.
Insights
Chemokine CXCL14 (BRAK) shows potential for cancer suppression by inhibiting tumor growth. Its context-dependent effects on tumor formation warrant further investigation for novel therapeutic strategies.
Area of Science:
- Oncology
- Immunology
- Molecular Biology
Background:
- Cancer poses a significant global health and economic burden, necessitating innovative tumor suppression strategies.
- Identifying molecular mechanisms underlying tumor suppression is crucial for developing effective treatments.
- Chemokines play diverse roles in biological processes, including cancer progression.
Purpose of the Study:
- To investigate the role of chemokine CXCL14 (BRAK) in cancer progression.
- To explore the context-dependent effects of CXCL14 on tumor growth and metastasis.
- To identify potential therapeutic applications of CXCL14 in cancer treatment.
Main Methods:
- Screening for downregulated molecules in a cancer progression model.
- Overexpression of CXCL14 in tumor cells and subsequent transplantation in immunodeficient mice.
- Analysis of tumor growth, metastasis, and chemical carcinogenesis in transgenic mice with altered CXCL14 levels.
- Review of existing literature on CXCL14 in cancer progression.
Main Results:
- CXCL14 was significantly downregulated during cancer progression.
- Increased CXCL14 production suppressed tumor cell growth in vivo.
- Transgenic mice overexpressing CXCL14 exhibited reduced tumor growth, metastasis, and chemical carcinogenesis.
- CXCL14 also demonstrated antimicrobial properties.
Conclusions:
- CXCL14 exhibits context-dependent roles in cancer, acting as a suppressor in some settings and potentially a promoter in others.
- Further research into the mechanisms underlying CXCL14's dual role is essential for its therapeutic application.
- CXCL14 represents a promising target for novel cancer therapies, particularly given its potential for tumor suppression and antimicrobial activity.
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