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Neurocognitive Decline Following Radiotherapy: Mechanisms and Therapeutic Implications

1
Laboratory of Biomedical Technologies, ENEA CR-Casaccia, Via Anguillarese 301, 00123 Rome, Italy
2
Department of Radiation Physics Guglielmo Marconi University, Via Plinio 44, 00193 Rome, Italy
*
Authors to whom correspondence should be addressed.
Cancers 2020, 12(1), 146; https://doi.org/10.3390/cancers12010146
Received: 22 November 2019 / Revised: 2 January 2020 / Accepted: 6 January 2020 / Published: 8 January 2020
(This article belongs to the Special Issue Animal Models for Radiotherapy Research)
The brain undergoes ionizing radiation (IR) exposure in many clinical situations, particularly during radiotherapy for malignant brain tumors. Cranial radiation therapy is related with the hazard of long-term neurocognitive decline. The detrimental ionizing radiation effects on the brain closely correlate with age at treatment, and younger age associates with harsher deficiencies. Radiation has been shown to induce damage in several cell populations of the mouse brain. Indeed, brain exposure causes a dysfunction of the neurogenic niche due to alterations in the neuronal and supporting cell progenitor signaling environment, particularly in the hippocampus—a region of the brain critical to memory and cognition. Consequent deficiencies in rates of generation of new neurons, neural differentiation and apoptotic cell death, lead to neuronal deterioration and lasting repercussions on neurocognitive functions. Besides neural stem cells, mature neural cells and glial cells are recognized IR targets. We will review the current knowledge about radiation-induced damage in stem cells of the brain and discuss potential treatment interventions and therapy methods to prevent and mitigate radiation related cognitive decline.
Keywords: neural stem cells; neurogenesis; ionizing radiation; neurocognitive effects neural stem cells; neurogenesis; ionizing radiation; neurocognitive effects
MDPI and ACS Style

Pazzaglia, S.; Briganti, G.; Mancuso, M.; Saran, A. Neurocognitive Decline Following Radiotherapy: Mechanisms and Therapeutic Implications. Cancers 2020, 12, 146.

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