Tumor necrosis factor-alpha promotor polymorphisms and endometriosis

Area of Science:

• Genetics
• Reproductive Medicine
• Immunology

Background:

• Endometriosis is a complex gynecological condition with potential genetic underpinnings.
• Tumor necrosis factor-alpha (TNF-alpha) plays a role in inflammation and immune responses, making its gene promoter region a candidate for genetic association studies.
• Specific polymorphisms in the TNF-alpha gene promoter, such as G-308A (TNF2) and G-238A (TNFA-A), have been investigated for their potential link to various diseases.

Purpose of the Study:

• To investigate whether the presence of mutant tumor necrosis factor (TNF)2 (G-308*A) and TNFA-A (G-238*A) alleles in the TNF-alpha gene promoter region is more prevalent in women with endometriosis.
• To determine the genotype and allele frequencies of these TNF-alpha promoter polymorphisms in women with and without endometriosis.

Main Methods:

• A retrospective case-control study was conducted.
• Polymerase chain reaction (PCR) was used to identify G-308A and G-238A promoter polymorphisms.
• The study included 92 women with confirmed endometriosis and 69 healthy controls.

Main Results:

• Allele frequencies for the TNF2 polymorphism were 0.13 in endometriosis patients and 0.16 in controls.
• Allele frequencies for the TNFA-A polymorphism were 0.04 in endometriosis patients and 0.05 in controls.
• No statistically significant differences in allele or genotype frequencies were observed between the endometriosis and control groups for either polymorphism. Homozygous TNF2 (TNF(2/2)) was found in 4.3% of cases and 2.9% of controls (P=.7). No TNFA-A homozygotes were detected.

Conclusions:

• The G-308A TNF-alpha and G-238A TNF-alpha polymorphisms are not associated with endometriosis in the studied white population.
• These specific TNF-alpha promoter gene variants do not appear to be risk factors for developing endometriosis.