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Tumor suppressor role of protein 4.1B/DAL-1
1Molecular Biology Research Center, School of Life Sciences, Central South University, 110 Xiangya Road, Changsha, 410078, China.
Abstract:
Protein 4.1B/DAL-1 is a membrane skeletal protein that belongs to the protein 4.1 family. Protein 4.1B/DAL-1 is localized to sites of cell-cell contact and functions as an adapter protein, linking the plasma membrane to the cytoskeleton or associated cytoplasmic signaling effectors and facilitating their activities in various pathways. Protein 4.1B/DAL-1 is involved in various cytoskeleton-associated processes, such as cell motility and adhesion. Moreover, protein 4.1B/DAL-1 also plays a regulatory role in cell growth, differentiation, and the establishment of epithelial-like cell structures. Protein 4.1B/DAL-1 is normally expressed in multiple human tissues, but loss of its expression or prominent down-regulation of its expression is frequently observed in corresponding tumor tissues and tumor cell lines, suggesting that protein 4.1B/DAL-1 is involved in the molecular pathogenesis of these tumors and acts as a potential tumor suppressor. This review will focus on the structure of protein 4.1B/DAL-1, 4.1B/DAL-1-interacting molecules, 4.1B/DAL-1 inactivation and tumor progression, and anti-tumor activity of the 4.1B/DAL-1.
Insights
Protein 4.1B/DAL-1, a tumor suppressor, links cell membranes to the cytoskeleton and regulates cell growth. Its loss is linked to tumor progression, highlighting its anti-tumor potential.
Area of Science:
- Molecular Biology
- Cell Biology
- Cancer Research
Background:
- Protein 4.1B/DAL-1 is a membrane skeletal protein crucial for cell-cell contact.
- It acts as an adapter, connecting the plasma membrane to the cytoskeleton and signaling pathways.
- It regulates cell motility, adhesion, growth, and differentiation.
Purpose of the Study:
- To review the structure and function of Protein 4.1B/DAL-1.
- To explore its role in cell-cell adhesion and cytoskeleton organization.
- To investigate its tumor suppressor activity and implications in cancer pathogenesis.
Main Methods:
- Literature review focusing on Protein 4.1B/DAL-1 structure and interactions.
- Analysis of studies on Protein 4.1B/DAL-1 expression in normal and tumor tissues.
- Examination of research on the functional consequences of Protein 4.1B/DAL-1 inactivation.
Main Results:
- Protein 4.1B/DAL-1 is essential for establishing epithelial-like structures.
- Loss or down-regulation of Protein 4.1B/DAL-1 expression is common in various tumors.
- This down-regulation correlates with tumor progression and suggests a tumor suppressor role.
Conclusions:
- Protein 4.1B/DAL-1 is a key regulator of cell structure and adhesion.
- Its inactivation contributes to tumor development, making it a target for cancer therapy.
- Further research into Protein 4.1B/DAL-1's anti-tumor activities is warranted.
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