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Immune Signaling Kinases in Amyotrophic Lateral Sclerosis (ALS) and Frontotemporal Dementia (FTD)

Journal

Publisher

MDPI
DOI: 10.3390/ijms222413280

Keywords

amyotrophic lateral sclerosis (ALS); frontotemporal dementia (FTD); kinase; neuroinflammation; immune; signaling; neurodegeneration; inhibitor; therapy; drug

Funding

  1. Spanish Ministry of Economy [RTI2018098432-B-I00]
  2. Fundacion 'Ramon Areces' [CIVP19A5938]
  3. Andalusian Regional Government-FEDER [US-1265227]
  4. I+D PAIDI [PY20_01097]
  5. 'Programa Ramon y Cajal' of the Spanish Ministry of Economy [RYC-2017-23127]

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ALS and FTD are the most common neurodegenerative diseases in adults, sharing clinical, genetic, and pathological similarities, characterized by progressive neuronal loss and chronic inflammation mediated by immune signaling kinases. The role of immune signaling kinases in determining neuroprotective or neurodegenerative states in ALS and FTD is crucial for understanding the underlying mechanisms of these disorders.
Amyotrophic lateral sclerosis (ALS) is the most common neurodegenerative disorder of motor neurons in adults, with a median survival of 3-5 years after appearance of symptoms, and with no curative treatment currently available. Frontotemporal dementia (FTD) is also an adult-onset neurodegenerative disease, displaying not only clinical overlap with ALS, but also significant similarities at genetic and pathologic levels. Apart from the progressive loss of neurons and the accumulation of protein inclusions in certain cells and tissues, both disorders are characterized by chronic inflammation mediated by activated microglia and astrocytes, with an early and critical impact of neurodegeneration along the disease course. Despite the progress made in the last two decades in our knowledge around these disorders, the underlying molecular mechanisms of such non-cell autonomous neuronal loss still need to be clarified. In particular, immune signaling kinases are currently thought to have a key role in determining the neuroprotective or neurodegenerative nature of the central and peripheral immune states in health and disease. This review provides a comprehensive and updated view of the proposed mechanisms, therapeutic potential, and ongoing clinical trials of immune-related kinases that have been linked to ALS and/or FTD, by covering the more established TBK1, RIPK1/3, RACK I, and EPHA4 kinases, as well as other emerging players in ALS and FTD immune signaling.

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