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August 23, 2026Turkish Journal of BiochemistryOpen Access

Investigation of SREBP-1 and C/EBPβ expression during global ischemia/reperfusion-induced oxidative stress in rat brain cortex and cerebellum

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Authors

MDMelih DağdevirenMIMesude IscanPKPelin Kelicen‐Uğur

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Overview

Animal experiment reveals timed increases in SREBP-1, C/EBPβ, and oxidative stress markers in rat brains following ischemia/reperfusion, indicating phase-specific roles in neurodegeneration.

Key Points

  • To investigate the temporal expression profiles of transcription factors SREBP-1 and C/EBPβ alongside oxidative stress markers in rat brain cortex and cerebellum following global ischemia/reperfusion injury.
  • Adult male rats underwent 10 minutes of carotid artery occlusion and hypotension (or sham operation), followed by reperfusion periods of 24 hours, 1 week, 2 weeks, or 4 weeks.
  • Quantified SREBP-1 and C/EBPβ protein levels in cytosolic and nuclear fractions using Western blotting.
  • Measured oxidative stress parameters, including TBARS and total thiol levels alongside SOD and GST enzymatic activities.
  • C/EBPβ expression increased significantly in cortical cytosolic (1.19- to 1.58-fold) and nuclear (1.73- to 1.81-fold) extracts at 24 hours and 1 week, and in cerebellar extracts at 1 week (1.63-fold cytosolic, 1.35-fold nuclear).
  • SREBP-1 expression peaked at 1 week post-reperfusion across cortical (2.07-fold cytosolic, 1.41-fold nuclear) and cerebellar (2.15-fold cytosolic, 1.79-fold nuclear) fractions.
  • TBARS levels and SOD activities rose significantly by 43.16% and 47.30%, respectively, at 24 hours post-reperfusion.

Cite This Study

Dağdeviren et al. (2026) studied this question.

synapsesocial.com/papers/6a8aadf37677a341144467f2https://doi.org/10.1515/tjb-2025-0362
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