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Interleukin 6 and complement serum level study in Parkinson’s disease

  • Neurology and Preclinical Neurological Studies - Original Article
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Abstract

The objective of this study is to assess whether elevation of serum inflammatory markers levels may indicate the progression of clinical impairment in Parkinson’s disease (PD) patients. In 47 PD patients, the serum levels of the C3 and C4 part of the complement and Interleukin-6 (IL-6) were measured. The results at baseline and after 2 years were correlated with scales measuring memory, depression, motor symptoms, and quality of life. Patients with higher levels of C3 and C4 at baseline had decreased quality of life, verbal ability, and memory. Patients with higher IL-6 at baseline showed worse depression scores at 2 years. Patients with persistently higher levels of C3 and C4 at 2 years had worse quality of life and memory ability. Uncorrected p values are reported due to the exploratory nature of the study. The results indicate an impact of inflammation on non-motor signs and quality of life in PD. The increase of levels of serum inflammatory biomarkers may indicate the progression of non-motor impairment in PD.

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Abbreviations

ACE:

Addenbrooke’s cognitive examination

ADL:

Activity of Daily Living Scale

BI:

Barthel Index

BVRT:

Benton visual retention test

CDT:

Clock drawing test

CSF:

Cerebrospinal fluid

ECLIA:

Electrochemiluminescence immunoassay

H–Y:

Hoehn–Yahr Scale

IL-6:

Interleukin 6

MADRS:

Montgomery Asberg Depression Rating Scale

MMSE:

Mini-mental state examination

PD:

Parkinson’s disease

UPDRS:

Unified Parkinson’s Disease Rating Scale

VFT:

Verbal fluency test

WMS:

Wechsler Memory Scale

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Acknowledgements

We would like to thank to Prof. Egon Kurča, M.D., Ph.D., FESO, Prof. Peter Valkovič, M.D., Ph.D., and Ján Necpal, M.D., for kindly referring their patients for participation in this study and to Anne Johnson for grammatical assistance.

Funding

The study was supported by the Ministry of Education, Youth and Sports of the Czech Republic under the Project CEITEC 2020 (LQ1601).

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Authors

Contributions

BV: research project: conception, organization, execution; statistical analysis: review and critique; manuscript: writing of the first draft. MD: research project: execution; manuscript: review and critique. VT: research project: execution; manuscript: review and critique. EK: statistical analysis: design, execution, review and critique. MB: research project: execution. SK: research project: execution. TH: research project: execution. IR: research project: conception, organization, execution; statistical analysis: design; manuscript: review and critique.

Corresponding author

Correspondence to Ivan Rektor.

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None of the authors report any conflict of interest or financial disclosure.

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Veselý, B., Dufek, M., Thon, V. et al. Interleukin 6 and complement serum level study in Parkinson’s disease. J Neural Transm 125, 875–881 (2018). https://doi.org/10.1007/s00702-018-1857-5

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  • DOI: https://doi.org/10.1007/s00702-018-1857-5

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