• Sung-Nan Pei, Ming-Chun Ma, Huey-Ling You, Hung-Chun Fu, Ching-Yuan Kuo, Kun-Ming Rau, Ming-Chung Wang, and Chien-Te Lee.
• 1. Division of Hema-Oncology, Department of Internal Medicine, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan ; 2. Chang Gung University College of Medicine, Taoyuan, Taiwan ; 3. Graduate Institute of Clinical Medical Sciences, Chang Gung University College of Medicine, Taoyuan, Taiwan.
• Int J Med Sci. 2014 Jan 1; 11 (6): 614-9.

BackgroundGenome-wide-association studies have identified the TMPRSS6 polymorphism rs855791 has the strongest association with red blood cell indices or iron parameters in general population. Whether this genetic variant influences the susceptibility of iron deficiency anemia (IDA) in women with menstruation has not been well studied.MethodsIn this case-control study, we enrolled 67 women with IDA and 107 healthy volunteers, and analyzed their complete blood counts, rs855791 genotypes, and menstrual amounts. Menstrual blood loss was evaluated with a pictorial blood-loss assessment chart.ResultsThere were significantly fewer rs855791 C homozygotes in the IDA group than in the healthy group (11.9% vs. 25.2%, p = 0.03). The odds ratio (OR) of C homozygotes having IDA versus non-CC subjects having IDA was 0.4 (95% CI, 0.17 - 0.95, p = 0.04). When the analysis was confined to study subjects with menorrhagia, this difference became more prominent (9.6% vs. 28.6%, p = 0.01; OR, 0.27, 95% CI, 0.09 - 0.77, p = 0.01). For women with non-CC genotypes, there was an inverse correlation between hemoglobin levels and menstrual loss (p < 0.001); however, this association was not found for those with genotypes CC (p = 0.15).ConclusionsOur study suggests homozygosity for TMPRSS6 rs855791 C genotype has a protective role against IDA in women at reproductive age, especially in those with menorrhagia.

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