[Relationship between surface HLA-DR expression and NBT reduction in monocytes in patients with colorectal cancer].
The expression of HLA-DR antigens and their capacity to reduce nitroblue tetrazolium (NBT) have been evaluated in monocytes (Mo) from 28 patients with colorectal carcinoma (CCa) before antineoplastic treatment as well as in 29 normal control (NC). Simultaneously, circulating immune complexes (CIC) levels were studied in both groups. The results were expressed as the media of percentages. They show a decrease of Mo bearing HLA-DR (p less than 0.001 vs NC) and increase of MO with capacity to reduce NBT (p less than 0.001 vs NC). An increase of CIC levels in CCa compared to the NC (p less than 0.001) was also observed. We can postulate that the decrease in HLA-DR expression could be caused by the increase of toxic oxygen intermediates whose production was induced by CIC or tumoral antigens adherence.
Novellino
P S
PS
Instituto de Biología y Medicina Experimental, Buenos Aires Hospital Zonal de Agudos I. Iriarte, Argentina.
Trejo
Y G
YG
Fernández
O
O
Bordenave
H
H
Rumi
L S
LS
D000936:Antigen-Antibody Complex / Q000032:analysis; D015179:Colorectal Neoplasms / Q000097:blood / Q000276:immunology*; D006684:HLA-DR Antigens / Q000032:analysis*; D006801:Humans; D009000:Monocytes / Q000378:metabolism*; D009580:Nitroblue Tetrazolium / Q000378:metabolism*; D010084:Oxidation-Reduction
D000936:Antigen-Antibody Complex; D006684:HLA-DR Antigens; D009580:Nitroblue Tetrazolium
Relación entre expresión de HLA-DR de superficie y reducción del NBT en monocitos de pacientes con cáncer colorrectal.