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Table 4 Correlation analysis of the study population performed for CD56dim and CD56bright cells (age vs. the analyzed parameters)

From: CD56bright cells respond to stimulation until very advanced age revealing increased expression of cellular protective proteins SIRT1, HSP70 and SOD2

Compared parameter
Parameter Stimulation type SOD2 SIRT1 HSP70intr HSP70surf TNF IFN-γ
CD56dim
 Age none −0.229 0.289 0.295 ns 0.451 ns
IL-2 ns ns ns ns 0.499 ns
LPS ns 0.409 0.399 ns 0.534 ns
PMA/ion 0.219 0.263 ns 0.470 0.324 ns
CD56bright
 Age none −0.228 0.281 0.226 0.239 0.554 ns
IL-2 ns ns ns ns 0.518 0.241
LPS ns 0.417 0.391 0.277 0.621 ns
PMA/ion ns 0.235 0.345 0.421 0.439 0.355
  1. All values are presented as statistically significant (p < 0.05) Spearman’s correlation coefficients (R). ‘ns’ denotes statistically not significant
  2. 'HSP70intr' intracellular HSP70, 'HSP70surf' surface HSP70, 'PMA/ion' PMA + ionomycin