Static and Dynamic Characteristics of Functional Network Connectivity in Neurologically Asymptomatic Patients...

Area of Science:

• Neuroscience
• Radiology
• Nephrology

Background:

• Static functional network connectivity (sFNC) and dynamic FNC (dFNC) characteristics remain unknown in neurologically asymptomatic patients undergoing maintenance hemodialysis.
• Understanding these brain connectivity patterns may elucidate mechanisms of neuropathological damage in this population.

Purpose of the Study:

• To investigate the static and dynamic functional network connectivity (FNC) in neurologically asymptomatic patients on maintenance hemodialysis.
• To examine the associations between FNC parameters and neuropsychological scores, as well as blood biomarkers.

Main Methods:

• Retrospective study involving 23 hemodialysis patients and 25 healthy controls.
• 3.0T MRI/functional MRI and 3D-T1 structural imaging were used to assess sFNC and dFNC strengths and temporal parameters.
• Neuropsychological and blood biochemical tests were conducted.

Main Results:

• Significant differences in sFNC and dFNC strengths were observed between patient and control groups.
• sFNC strength correlated with global cognitive function (MoCA) and anxiety scores.
• Dynamic FNC parameters (mean dwell time, fractional window) showed positive correlations with cognitive task performance.

Conclusions:

• Patients undergoing maintenance hemodialysis demonstrate impaired sFNC and dFNC, even without neurological symptoms.
• These findings provide novel insights into the neuropathological damage mechanisms in patients on maintenance hemodialysis.