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Renal transplantation improves brain default mode network (DMN) connectivity. Functional connections recover faster than structural ones within one month, correlating with better cognitive function and hematocrit levels.

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Area of Science:

  • Neuroimaging
  • Nephrology
  • Neurology

Background:

  • End-stage renal disease (ESRD) can cause neurological complications.
  • The default mode network (DMN) is crucial for cognitive functions.
  • Brain alterations in ESRD patients undergoing renal transplantation are not fully understood.

Purpose of the Study:

  • To investigate structural and functional changes in the DMN after renal transplantation in ESRD patients.
  • To utilize diffusion-tensor imaging (DTI) and resting-state functional MR imaging (rs-fMRI) for this investigation.

Main Methods:

  • Prospective study including 21 ESRD patients and 21 healthy controls.
  • DTI and rs-fMRI scans performed before and 1 month after transplantation in patients.
  • Quantitative comparison of DMN structural (mean diffusivity, fractional anisotropy) and functional (temporal correlation) connectivity.

Main Results:

  • Decreased mean diffusivity in specific DMN fiber bundles post-transplantation.
  • Functional connectivity in patients approached control levels one month after transplantation.
  • Structural and functional changes correlated with improved hematocrit and cognitive test scores.

Conclusions:

  • Functional DMN connectivity may recover earlier than structural connectivity post-renal transplantation.
  • Improvements in DMN connectivity are associated with enhanced hematocrit and cognitive function.