CD151

Fibrosarcoma cells expressing CD151

CD151 is a protein that in humans is encoded by the CD151 gene. It is a member of the tetraspanin family, which are cell surface proteins involved in the regulation of cell development, activation, growth, and motility. CD151 is also known as the cluster of differentiation 151.

Structure

CD151 is a transmembrane protein that spans the cell membrane four times, characteristic of the tetraspanin family. It has two extracellular loops, a small intracellular loop, and short cytoplasmic tails. The large extracellular loop is involved in protein-protein interactions, which are crucial for its function in cell adhesion and signaling.

Function

CD151 plays a significant role in cell adhesion, migration, and signaling. It is known to associate with integrins, particularly integrin alpha3 and integrin alpha6, forming complexes that are important for the stabilization of cell-cell and cell-matrix interactions. These interactions are critical in processes such as angiogenesis, tumor metastasis, and wound healing.

Clinical Significance

CD151 has been implicated in various pathological conditions, including cancer. It is often overexpressed in carcinomas and is associated with poor prognosis in several types of cancer, such as breast cancer, prostate cancer, and melanoma. CD151 promotes cancer cell migration and invasion, contributing to metastasis.

In addition to its role in cancer, CD151 is involved in kidney disease. Mutations in the CD151 gene can lead to nephropathy and hearing loss, as seen in some genetic syndromes.

Research

Research on CD151 is ongoing to better understand its role in disease and its potential as a therapeutic target. Inhibiting CD151 function has been proposed as a strategy to prevent cancer metastasis. Studies are also exploring its role in angiogenesis and its potential impact on cardiovascular disease.

Related pages

• Tetraspanin
• Integrin
• Cell adhesion
• Cancer metastasis