Astrocytes in Post-Stroke Depression: Roles in Inflammation, Neurotransmission, and Neurotrophin Signaling

Area of Science:

• Neuroscience
• Cell Biology
• Psychiatry

Background:

• Post-stroke depression (PSD) affects up to one-third of stroke survivors, representing a significant complication.
• The underlying pathophysiology of PSD is multifactorial, involving neurochemical, neuroinflammatory, neurotrophic, and neuroplastic alterations.
• Astrocytes, abundant glial cells in the central nervous system, are integral to modulating neurotransmission, inflammation, neurogenesis, and synaptic plasticity.

Purpose of the Study:

• To review current evidence on astrocyte involvement in the pathophysiology of post-stroke depression.
• To explore alterations in astrocyte markers and functions related to key mechanisms in PSD.
• To discuss the therapeutic potential of targeting astrocytes for PSD management.

Main Methods:

• Systematic review of human and animal studies investigating astrocyte roles in PSD.
• Analysis of astrocyte alterations concerning monoamine neurotransmitters, inflammatory cytokines, BDNF, and glutamate excitotoxicity.
• Synthesis of findings to identify therapeutic implications.

Main Results:

• Astrocytes exhibit significant alterations in markers and functions during PSD.
• These changes are linked to disruptions in neurotransmission, inflammation, neurotrophic support, and excitotoxicity.
• Evidence suggests astrocytes are critically involved in PSD development and progression.

Conclusions:

• Astrocytes are implicated in the complex pathophysiology of post-stroke depression.
• Targeting astrocyte homeostasis and function presents a promising therapeutic strategy for PSD.
• Astrocytes represent novel targets for the development of future antidepressant medications and interventions.