We sequenced the lymphotoxin alpha (LTA) promoter and identified LTA10G>A in strong linkage with LTA252G>A and LTA723C>A. Stimulated cells from LTA723AA: LTA252GG:LTA10AA individuals had significantly higher LTA mRNA levels than LTA723CC:LTA252AA:LTA10GG and LTA723AA:LTA252AG:LTA10GA individuals, suggesting that this diplotype may contain a functional polymorphism explaining the observed disease associations with LTA252G>A.
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