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Mitochondrial DNA haplogroup R in the Han population and recovery from septic encephalopathy

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Abstract

Purpose

To determine whether the main mitochondrial DNA (mtDNA) haplogroups of the Han people are associated with neurological recovery from septic encephalopathy.

Methods

We studied 137 individuals with septic encephalopathy who were sequentially admitted to the intensive care unit or the emergency intensive care unit at the First Affiliated Hospital, College of Medicine, Zhejiang University, and the People’s Hospital of Zhejiang Province. Demographic and clinical data were recorded along with clinical outcome over 28 days. The Glasgow coma scale (GCS) score was calculated daily until it reached 15 or until the patient died during the 28-day period. Follow-up was completed for all study participants. We then determined the mtDNA haplogroups of the patients by analyzing sequences of hypervariable mtDNA segments and testing diagnostic polymorphisms in the mtDNA coding region with DNA probes.

Results

MtDNA haplogroup R, one of the main mtDNA haplogroups of the Han people, was a strong independent predictor of outcome following septic encephalopathy, conferring a 4.053-fold (95% CI 1.803–9.110, p = 0.001) increased chance of neurological recovery within 28 days compared with those with a non-R mtDNA haplogroup.

Conclusion

In the Han population, mtDNA haplogroup R is a strong independent predictor of the outcome of septic encephalopathy, conferring an increased chance of neurological recovery compared with individuals with a non-R haplogroup. Our results provide potential insights into the mechanisms involved in septic encephalopathy, and reveal that the mtDNA haplogroup R is an independent predictor of the outcome of septic encephalopathy.

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Acknowledgments

This project was funded by the National Natural Science Foundation of China (81000827) and Social Development Projects in Important Science and Technology Research of the Science and Technology Department of Zhejiang Province (2007C13055).

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Authors and Affiliations

  1. Kidney Disease Center, The First Affiliated Hospital, College of Medicine, Zhejiang University, 79 Qingchun road, Hangzhou, 310003, China

    Yi Yang, Ping Zhang, Rong Lv, Qiang He, Yiling Zhu & Jianghua Chen

  2. Intensive Care Unit, The People’s Hospital of Zhejiang Province, 158 Shangtang road, Hangzhou, 310014, China

    Xianghong Yang

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  1. Yi Yang
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  2. Ping Zhang
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  4. Qiang He
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  5. Yiling Zhu
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  7. Jianghua Chen
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Correspondence to Jianghua Chen.

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Yang, Y., Zhang, P., Lv, R. et al. Mitochondrial DNA haplogroup R in the Han population and recovery from septic encephalopathy. Intensive Care Med 37, 1613–1619 (2011). https://doi.org/10.1007/s00134-011-2319-9

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  • DOI: https://doi.org/10.1007/s00134-011-2319-9

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