Validating genetic variants in innate immunity linked to infectious events in acute myeloid leukemia post-induction
Ulf Schnetzke1, Mike Fischer2, Christoph Röllig3
1Klinik für Innere Medizin II, Abteilung für Hämatologie und Internistische Onkologie, Comprehensive Cancer Center Central Germany - Campus Jena, Universitätsklinikum Jena, Jena, Germany. ulf.schnetzke@med.uni-jena.de.
Abstract:
Infectious events, such as sepsis and invasive fungal disease (IFD), pose significant risks in patients with acute myeloid leukemia (AML). Previous studies, including our own, have suggested a potential role of single nucleotide polymorphisms (SNPs) within the innate immune system in influencing individual infection susceptibility. However, many of these associations lack validation in independent cohorts. This study sought to validate the impact of 11 candidate SNPs across 6 genes (TLR2, TLR4, Dectin-1, DC-SIGN, PTX3, L-Ficolin) in an independent cohort of patients. Two cohorts with newly diagnosed AML patients receiving intensive induction chemotherapy were analyzed: a stratification cohort comprising 186 patients and a validation cohort consisting of 138 patients. Multiple SNPs in each cohort were found to be associated to infectious complications, notably the DC-SIGN SNP rs4804800 demonstrated a significant association with sepsis in both cohorts. SNPs within the PTX3 and Dectin-1 genes were linked to IFD development in one cohort each. This study represents the first validation study of candidate genes associated with infectious events in AML patients after intensive induction chemotherapy. Identifying genetic predispositions to infections could significantly impact the management of antimicrobial prophylaxis and treatment in AML patients.
Insights
Genetic variations in innate immune genes influence infection risk in acute myeloid leukemia (AML) patients. This study validates specific single nucleotide polymorphisms (SNPs) associated with sepsis and invasive fungal disease (IFD) in AML.
Area of Science:
- Immunology
- Genetics
- Hematology
Background:
- Infectious complications like sepsis and invasive fungal disease (IFD) are major risks for acute myeloid leukemia (AML) patients undergoing chemotherapy.
- Single nucleotide polymorphisms (SNPs) in innate immune genes may influence individual susceptibility to infections, but require validation.
Purpose of the Study:
- To validate the association of 11 candidate SNPs in 6 innate immune genes with infectious complications in a new cohort of AML patients.
- To confirm findings from previous studies in an independent patient group.
Main Methods:
- Analysis of two independent cohorts of newly diagnosed AML patients (stratification: 186 patients, validation: 138 patients).
- Genotyping of 11 candidate SNPs in TLR2, TLR4, Dectin-1, DC-SIGN, PTX3, and L-Ficolin genes.
- Statistical analysis to assess the association between SNPs and infectious complications (sepsis, IFD).
Main Results:
- Multiple SNPs were associated with infectious complications in both AML cohorts.
- The DC-SIGN SNP rs4804800 showed a significant association with sepsis in both cohorts.
- SNPs in PTX3 and Dectin-1 genes were linked to IFD development in separate cohorts.
Conclusions:
- This study provides the first validation of candidate genes associated with infectious events in AML patients receiving intensive induction chemotherapy.
- Identifying genetic predispositions can inform antimicrobial prophylaxis and treatment strategies for AML patients.
- Genetic factors play a role in infection susceptibility in AML, impacting clinical management.
