Correlation between ERα gene polymorphism and multiple sclerosis and neuromyelitis optica

Area of Science:

• Genetics
• Neuroimmunology
• Molecular Biology

Background:

• Multiple Sclerosis (MS) and Neuromyelitis Optica (NMO) are debilitating neurological autoimmune diseases.
• The Estrogen Receptor alpha (ER α) gene plays a role in immune responses and has been investigated in various autoimmune conditions.

Purpose of the Study:

• To investigate the distribution of Estrogen Receptor alpha (ER α) gene polymorphisms.
• To determine the association between ER α gene polymorphisms and susceptibility to MS and NMO.
• To explore the correlation of these polymorphisms with clinical characteristics such as age of onset, disease duration, and gender.

Main Methods:

• Polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) analysis was used to examine ER α gene polymorphisms (Pvu II and Xba I sites).
• Genotyping was performed on 46 patients diagnosed with MS or NMO and 58 healthy controls.
• Clinical data including age of onset, disease course, and gender were collected and analyzed.

Main Results:

• No significant difference in Pvu II (PP, Pp, pp) genotype distribution was observed between patients and controls.
• A statistically significant difference in Xba I (XX, Xx, xx) genotype distribution was found between MS/NMO patients and controls (P = .021).
• The Xx genotype showed a significant association with MS/NMO (P = .001, OR = 4.622). This polymorphism also correlated with disease duration (P = .006) and gender (P = .047), particularly in women.

Conclusions:

• Xba I gene polymorphisms in the ER α gene are associated with MS and NMO, suggesting it as a potential risk factor.
• Women with the Xx genotype appear to be more susceptible to MS and NMO.
• ER α Xba I gene polymorphisms may influence the disease duration in MS and NMO patients, with the Xx genotype potentially leading to longer disease courses.