Study on the Relationship between Unexplained Recurrent Abortion and HLA-DQ Gene Polymorphism

Area of Science:

• Immunogenetics
• Reproductive Medicine

Background:

• Recurrent miscarriage (RM) affects couples, and genetic factors like human leukocyte antigen (HLA) genes are implicated.
• Understanding the role of specific HLA-DQB1 variants in RM is crucial for diagnosis and potential interventions.

Purpose of the Study:

• To investigate the association between human leukocyte antigen (HLA-DQB1) gene polymorphisms and recurrent miscarriage in a Chinese population.
• To identify specific HLA-DQB1 alleles that may confer susceptibility or protection against RM.

Main Methods:

• Case-control study involving 50 couples with recurrent miscarriage and 30 control couples with normal births.
• Human leukocyte antigen (HLA)-DQB1 gene polymorphisms were analyzed using sequence-specific primer-guided polymerase chain reaction (PCR-SSP).

Main Results:

• The frequency of the HLA-DQB1*0303 allele was significantly higher in couples with recurrent miscarriage (21.50%) compared to controls (11.67%) (P=0.0260).
• Conversely, the HLA-DQB1*0302 allele was less frequent in the recurrent miscarriage group (4.00%) than in controls (10.00%) (P=0.0318), suggesting a protective role.
• No significant differences were observed in the frequencies of sharing one or two HLA-DQB1 alleles between the recurrent miscarriage and control groups.

Conclusions:

• The HLA-DQB1*0303 allele may act as a susceptibility gene for recurrent miscarriage in the Zhejiang population.
• The HLA-DQB1*0302 allele might offer a protective effect against recurrent miscarriage, especially for women.