AHR protein identified as brake on nerve fibre regeneration in mouse injury models

Scientists have published findings identifying the aryl hydrocarbon receptor (AHR) as a protein that suppresses the nervous system's capacity to repair damaged connections. The work, reported via ScienceDaily, describes how blocking AHR activity allowed injured nerve fibres to regrow and led to measurable improvements in movement and sensation in mouse models of peripheral nerve injury and spinal cord injury.

The researchers describe AHR as acting like a molecular brake, keeping injured neurons in a survival mode rather than switching them into an active regeneration programme. Removing that brake, in their models, shifted the cellular response towards rebuilding.

The study adds to a body of preclinical research seeking to understand why the mammalian nervous system has limited regenerative capacity compared with some other tissues. The findings are at an early, animal-model stage; the source report does not identify the publishing institution or journal directly, and the summary is based on the ScienceDaily digest. Researchers and educators working in neuroscience and molecular genetics may find the AHR mechanism of interest; the work is not directly related to inherited genetic disease but touches on gene-regulated cellular responses to injury.