Mechanisms linking connexin mutations to human diseases

Area of Science:

• Molecular biology
• Genetics
• Cell biology

Background:

• Connexins are transmembrane proteins forming intercellular channels.
• Connexins share structural similarities with pannexins and CALHM1 but lack sequence homology.
• Unlike pannexins and CALHM1, connexin gene mutations are linked to inherited human diseases.

Purpose of the Study:

• To review the molecular mechanisms by which connexin gene mutations cause inherited diseases.
• To highlight the diverse range of defects, including oligomerization, folding, and function, resulting from connexin mutations.
• To discuss emerging therapeutic strategies for connexin-linked diseases.

Main Methods:

• Literature review of connexin gene mutations and associated diseases.
• Analysis of molecular mechanisms underlying connexin-related pathologies.
• Exploration of current and future therapeutic approaches.

Main Results:

• Inherited human diseases are exclusively associated with connexin gene mutations.
• Connexin mutations lead to various molecular defects, including impaired protein processing and altered channel function.
• These defects manifest as developmental abnormalities or organ failure, such as hearing loss.

Conclusions:

• Connexin gene mutations are the sole cause of inherited diseases among connexin, pannexin, and CALHM1 channel families.
• Understanding the molecular basis of connexin-linked diseases is crucial for developing effective treatments.
• Advancements in connexin research offer promising therapeutic avenues for patients.