Comparative significancea of the main indicators of basic neurobiological processes across the three stages analyzed (Younger, Elder, and MCI groups)

FunctionalityYoungerElderMCI
NTRKs signaling8.976.680
GDNF/RET signaling1.4902.76
Neuroinflammatory response2.955.390
Cellular response to stress3.404.090
Regulation of stress response2.432.960
MAPK cascade6.953.232.57
Stress-activated MAPK cascade1.841.770
Response to hypoxia6.955.190
Response to oxidative stress1.972.790
Cellular response to Abeta peptide5.306.975
Positive amyloid fibril formation2.013.350
ER stress & response to unfolded proteins03.080
Intrinsic apoptosis in ER stress04.690
Osmotic stress01.840
Response to glucocorticoids1.706.590
MeCP2 transcriptional regulation6.395.32 3.79
DREAM pathway4.612.350
Transcription regulation by NPAS45.472.740
Sumoylation of intracellular receptors2.302.960
CNS development12.5213.320
Pattern specification (GO: 0007389)1.834.830
Gliogenesis5.659.161.37
Astrocyte projection3.531.840
Astrocyte activation2.544.841.46
Neurogenesis (positive regulation)3.924.503.04
Neurogenesis (negative regulation)2.572.260
Cell fate commitment03.440
Dendrite development7.596.590
Dendrite spine organization7.2731.37
Axonogenesis11.999.481.37
Collateral sprouting4.274.151.60
Response to axon injury1.772.771.33
CA3-pyramidal cell dendrites1.4501.86
Hippocampal mossy fibers (DG-CA3)3.051.630
CA1-Schaffer collateral synapses2.621.843.45
Fear response4.872.541.60
Rhythm process4.466.12 1.76

a The significance is expressed as –log10 (FDR), where FDR is the false discovery rate. ER: endoplasmic reticulum; NTRKs: neurotrophic tropomyosin-receptor kinases; NPAS4: neuronal PAS domain protein 4; CA: cornu ammonis; DG: dentate gyrus. Note that a zero value denotes a non-significant functionality, as FDR = 1 (For details of the genes involved see Tables S1S3)