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Published on: June 6, 2025
Change in Programmed Death-1 and Inducible Costimulator Expression in Patients whit Acute Myeloid Leukemia Following
Mahdiyar Iravani Saadi1,2, Maryam Ahmadyan2, Heeva Jalali3
1Pediatric Cell and Gene Therapy Research Center, Gene, Cell and TissueResearch Institute,Tehran University of Medical Sciences, Tehran, Iran.
Background:
Programmed death-1 (PD-1) and inducible costimulator (ICOS) are immune checkpoint receptors participating in tumor immune evasion, which counters the activation signal provided through the T-cell receptor ligation. This study aimed to investigate the relationship between the expression of PD-1 and ICOS on mononuclear cells (MNCs) isolated from the peripheral blood of acute myeloid leukemia (AML) patients and their response to induction chemotherapy.
Materials And Methods:
Peripheral blood samples (5 cc) were collected from 56 AML patients at first diagnosis before and after the induction therapy regimen for AML. PD-1 and ICOS expression were analyzed in all patients before and after the standard induction therapy regimen.
Results:
The expression of PD-1 and ICOS significantly decreased (66.7 and 16.3 fold, respectively) in AML patients following chemotherapy compared to its baseline value (P=0.01 and P=0.001, respectively). The expressions of PD-1 and ICOS were significantly different between favorable and poor risk groups.
Conclusions:
Lower PD-1 and ICOS expressions on the surface of MNCs before induction therapy were associated with a better response to treatments. In addition, PD-1 and ICOS expression on MNCs decreased after induction therapy.
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