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Table 1 Summary of T cell populations’ alterations found in PD, AD, and MS patients’ blood

From: The Trojan horse - neuroinflammatory impact of T cells in neurodegenerative diseases

T cell population PD AD MS
CD4: CD8 ratio Reduced [12,13,14,15] Increased [38] Reduced [46]
Th1 cells Reduced [17] No differences [41] Increased [47]
Th17 cells Increased [18] Increased [41] Increased [47]
Comparable [17]   
Treg cells Comparable [25] Increased [25] Reduced [48]
Impaired function [12]