Table 1.

Human TAN and PMN-MDSC protumor and antitumor functions

TANs/PMN-MDSCsReferenceT-cell suppression confirmed in humans
TANsPMN-MDSCs
Protumor     
 T/NK cell suppression     
  Arginase 1 TANs, PMN-MDSCs 59  74,82,-84,91  Yes 
  ROS TANs, PMN-MDSCs 92  84,85  No 
  STAT3 PMN-MDSCs  93  Yes 
  STAT/IRF-8 PMN-MDSCs  78  No 
  LOX-1 PMN-MDSCs  89,90  Yes 
  mPR3 TANs 61   N/A 
  MPO/hydrogen peroxide TANs 62,63   N/A 
 Angiogenesis/metastasis     
  VEGF TANs, PMN-MDSCs 94  83  Yes 
  MMP9 TANs, PMN-MDSCs 34,95  88  Yes 
  NAMPT/STAT3 TANs 36   N/A 
  Oncostatin M TANs 45,46   N/A 
  NETs TANs 38   N/A 
  TNF-α TANs 55   N/A 
  IL-8 TANs 43,44,59   N/A 
  Elastase TANs 37   N/A 
 Immune cell recruitment     
  CCL17 TANs 39,40   N/A 
  CCL2 TANs 39   N/A 
Antitumor     
 Tumor cytotoxicity     
  ROS TAN 30,96   N/A 
  Granzyme B TAN 97   N/A 
  MET signaling TAN 32   N/A 
  Trogoptosis TAN 52   N/A 
  TNF-α TAN 32,53   N/A 
 T-cell activation/priming     
  Mechanism unknown TAN 48,98   N/A 
  NETs TAN 49   N/A 
TANs/PMN-MDSCsReferenceT-cell suppression confirmed in humans
TANsPMN-MDSCs
Protumor     
 T/NK cell suppression     
  Arginase 1 TANs, PMN-MDSCs 59  74,82,-84,91  Yes 
  ROS TANs, PMN-MDSCs 92  84,85  No 
  STAT3 PMN-MDSCs  93  Yes 
  STAT/IRF-8 PMN-MDSCs  78  No 
  LOX-1 PMN-MDSCs  89,90  Yes 
  mPR3 TANs 61   N/A 
  MPO/hydrogen peroxide TANs 62,63   N/A 
 Angiogenesis/metastasis     
  VEGF TANs, PMN-MDSCs 94  83  Yes 
  MMP9 TANs, PMN-MDSCs 34,95  88  Yes 
  NAMPT/STAT3 TANs 36   N/A 
  Oncostatin M TANs 45,46   N/A 
  NETs TANs 38   N/A 
  TNF-α TANs 55   N/A 
  IL-8 TANs 43,44,59   N/A 
  Elastase TANs 37   N/A 
 Immune cell recruitment     
  CCL17 TANs 39,40   N/A 
  CCL2 TANs 39   N/A 
Antitumor     
 Tumor cytotoxicity     
  ROS TAN 30,96   N/A 
  Granzyme B TAN 97   N/A 
  MET signaling TAN 32   N/A 
  Trogoptosis TAN 52   N/A 
  TNF-α TAN 32,53   N/A 
 T-cell activation/priming     
  Mechanism unknown TAN 48,98   N/A 
  NETs TAN 49   N/A 

LOX-1, low-density lipoprotein receptor-1; mPR3, membrane-associated proteinase 3; N/A, not applicable; NAMPT, nicotinamide phosphoribosyltransferase; NET, neutrophil extracellular trap; STAT3, signal transducer and activator of transcription 3; TNF-α, tumor necrosis factor α; VEGF, vascular endothelial growth factor.

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