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HLA class II polymorphism in Egyptian children with lymphomas
Y Al-Tonbary1, N Abdel-Razek, H Zaghloul
1Hematology/Oncology Unit, Mansoura University Children's Hospital, Faculty of Medicine, Mansoura University, Mansoura, Egypt. elembaby64@hotmail.com
Hematology (Amsterdam, Netherlands)
|June 19, 2004
Summary
Specific human leukocyte antigen (HLA) class II alleles are linked to increased susceptibility to childhood lymphomas. Certain HLA alleles may also offer protection against non-Hodgkin
Area of Science:
- Immunogenetics
- Oncology
- Molecular Biology
Background:
- The Major Histocompatibility Complex (MHC) plays a crucial role in immune responses, including defense against infections and susceptibility to diseases.
- Human Leukocyte Antigen (HLA) class II proteins are key components of the MHC, involved in immune regulation and disease association.
- Genetic linkage between HLA class II and susceptibility to lymphomas suggests a role for these alleles in disease development.
Purpose of the Study:
- To investigate potential alterations in HLA class II (DR, DQ) alleles in pediatric lymphoma patients.
- To identify specific HLA class II alleles associated with susceptibility or protection in childhood lymphomas.
Main Methods:
- A study involving 30 children with lymphoma (19 non-Hodgkin's lymphoma, 11 Hodgkin's lymphoma) and control groups for HLA typing.
- HLA class II DRB1 and DQB1 alleles were analyzed using the INNO-LIPA reverse hybridization line probe assay.
- Comprehensive clinical assessments and laboratory investigations were performed on all participants.
Main Results:
- Specific HLA-DRB1 and HLA-DQB1 alleles (*0403, *1301, *0501, *0201, *0301) were significantly elevated in non-Hodgkin's lymphoma patients compared to controls.
- Conversely, HLA-DRB1 *1302 and HLA-DQB1 *0502, *0602 were decreased in non-Hodgkin's lymphoma patients.
- Hodgkin's lymphoma patients showed increased frequencies of HLA-DRB1 *0403, *1202 and HLA-DQB1 *0604, *0201, *0203.
Conclusions:
- Certain HLA-DRB1 and HLA-DQB1 alleles are associated with increased susceptibility to non-Hodgkin's lymphoma and Hodgkin's lymphoma in children.
- Specific HLA alleles, such as HLA-DRB1 *1302 and HLA-DQB1 *0502, *0602, may confer a protective effect against non-Hodgkin's lymphoma.
- Further research is warranted to elucidate the prognostic value of HLA associations in lymphoma and their potential impact on future treatment strategies.