Table 2 The systematic review of the level changes for inflammatory markers on PD motor symptoms.

From: A systematic review and meta-analysis of inflammatory biomarkers in Parkinson’s disease

No.

Author

Year

Sample source

Assay type

Sample size

Age

Markers

Scale

Summary

UPDRS scores

1

Mueller, T.

1998

CSF

ELISA

22

61 (1.5)

IL-6

UPDRS III

Significant inverse correlation.

2

Rentzos, M.

2007

Serum

ELISA

41

67.5 (8.1)

CCL5

UPDRS III

Strong and significant positive correlation.

3

Dufek, M.

2009

serum

CLIA

29

68.2 (5.5)

TNF-α

UPDRS III

No significant associations.

4

Rentzos, M.

2009

Serum

ELISA

41

65.8 (11.2)

IL-10, IL-12

UPDRS III

No significant associations.

5

Scalzo, P.

2010

Serum

ELISA

44

NA

IL-6

UPDRS III

No significant associations.

6

Hassin-Baer, S.

2011

Plasma

CLIA

73

68.8 (11.5)

CRP

UPDRS III

No significant associations.

7

Lee, H. W.

2011

Plasma

ELISA

66

65.8 (8.8)

PTX3

UPDRS III

Significant positive correlation.

8

Scalzo, P.

2011

Serum

ELISA

47

61.8 (10.7)

chemokines

UPDRS III

No significant associations.

9

Zhao, X. Q.

2012

Serum

ELISA

40

67.3 (9.4)

TNF-α, STNFR1, STNFR2

UPDRS III

No significant associations.

10

Tang, P.

2014

Serum

ELISA

78

76.3 (5.0)

CCL5

UPDRS III

No significant associations.

11

Jiang, Q. W.

2015

Plasma

ELISA

59

64.4 (8.1)

CCL3, CCL4

UPDRS III

No significant associations.

12

Martín de Pablos, A.

2015

CSF

ELISA

37

63.4 (0.9)

TGF-β1

UPDRS III

Positive correlation was found.

13

Umemura, A.

2015

Serum

NA

375

69.3

CRP

UPDRS III

Plasma CRP levels were associated with motor deterioration and predicted motor prognosis in patients with PD.

14

Hall, S.

2016

CSF

ELISA

63

64.7 (9.4)

YKL-40

UPDRS III

No significant associations.

15

Williams-Gray, C. H.

2016

Serum

V-PLEX

230

66.4 (9.5)

IFN-γ, IL, TNF-α, CRP

UPDRS III

IL-6 was associated with higher UPDRS-III motor scores, while TNF-α and CRP were correlated with faster rates of motor decline, and IL-13 with slower rate of motor decline.

16

Delgado-Alvarado, M.

2017

CSF/Plasma

Luminex Xmap

39

71.3 (6.2)

TNF-α, IL, IFN-γ

UPDRS III

Plasma IL-6 levels were positively correlated in PD patients with UPDRS III.

17

Kim, R.

2018

Serum

MSD

58

62.4 (8.1)

IL, TNF-α, CRP

UPDRS III

No significant associations.

18

Moghaddam, H. S.

2018

CSF

NA

109

69.7 (6.5)

CRP

UPDRS III

A significant correlation was observed.

19

Ahmadi Rastegar, D.

2019

Serum

Multiplex

65

NA

7 cytokines

UPDRS III

IL-5, IL-8, G-CSF, CCL2, IL-10, IFN-γ and IL-15 positively correlated with the fold change in UPDRS III.

20

Álvarez-Luquín, D. D.

2019

Plasma

ELISA

32

60.8 (10.2)

IL, IFN-γ, TNF-α, GM-CSF, TGF-β, IL-35

UPDRS III

The plasmatic levels of IL-17 positively correlated with the UPDRS III scores.

21

Green, H. F.

2019

Plasma

SIMOA

63

69.9 (8.1)

IL-6, IL-17A, TNF-α, TGF-β

UPDRS III

IL-6, TNF-α, IL-17A and TGF-β were correlated with UPDRS-III.

22

King, E.

2019

Serum

MSD

112

69.5 (6.7)

TNF‐α, IL, IFN‐γ, CRP

UPDRS III

Negative correlations between UPDRS III and IL‐2 and IL‐4.

23

Perner, C.

2019

Plasma

ELISA

33

69.6 (10.4)

sVCAM-1

UPDRS III

No significant associations.

24

Chatterjee, K.

2020

Serum

ELISA

27

62.5 (7.7)

IL-1β, NLRP3

UPDRS III

No significant associations.

25

Fan, Z

2020

Plasma

MSD

43

58.4 (1.4)

IL-1β

UPDRS III

A positive correlation was found between UPDRS III scores and plasma levels of IL-1β.

26

Peng, G.

2020

CSF/Plasma

ELISA

55

59.8 (8.9)

sTREM2

UPDRS III

No significant associations.

27

Santaella, A.

2020

CSF

ELISA

46

57.5 (10.0)

CCL2

UPDRS III

No significant associations.

28

Galper, J.

2021

Plasma

Bio-Plex

75

62.4 (1.2)

IL, TNF-α, chemokines, PDGF

UPDRS III

The UPDRS III score positively correlated to IL-4, IL-8, CCL2, TNF-α, and CCL3.

29

Li, S. Y.

2021

Serum

Nephelometry

148

63.8 (11.1)

CRP

UPDRS III

No significant associations.

30

Mo, M. S.

2021

CSF

ELISA

80

63.6 (8.5)

sTREM2

UPDRS III

No significant associations.

31

Zhu, Y.

2021

Serum

ELISA

46

69.5 (9.6)

IL-6, TNF-α, sLAG3

UPDRS III

TNF-α positively correlated with UPDRS III in PD patients.

32

Diaz, K.

2022

Serum

Milliplex

26

72.8 (7.1)

TNF-α, IFN-γ, IL, GM-CSF

UPDRS II&III

Higher levels of IL-4 and lower levels of IFN-γ significantly predicted more severe tremor in persons with PD.

33

Gupta, M.

2022

Serum

ELISA

21

57.9 (9.3)

CX3CL1

UPDRS III

Gradually falling CX3CL1 levels correlated with increasing motor aberrations in PD patients.

34

Imarisio, A.

2022

Plasma

Elecsys

71

65.1 (10.5)

IL-6, CRP

UPDRS III

IL-6 correlated with UPDRS-III.

35

Kaminska, M.

2022

serum

Multiplex

66

64.6 (9.8)

IL, TNF-α, BDNF

UPDRS III

IL-6 was associated with the UPDRS III.

36

Lerche, S.

2022

CSF

Multiplex

68

NA

ICAM-1, IL, CCL2, TNF-α

UPDRS III

Higher CSF levels of IL-8 and lower CSF levels of IL-18 were associated higher UPDRS-III scores.

FOG

1

Santos-Garcia, D.

2019

Blood

ELISA

153

60.3 (6.1)

CRP

FOG-Q

CRP was significantly higher in PD patients with FOG, but it was not significant in the model after adjusting to covariates.

2

Hatcher-Martin, J. M.

2021

CSF

Milliplex

19

70.4 (10.1)

CX3CL1

NFOG-Q

CX3CL1 was significantly decreased in PD-FOG.

3

Liu, J.

2022

Plasma

Nephelometric

145

64.9 (11.0)

CRP

FOG-Q

The plasma CRP is a potential biomarker of FOG.

  1. BDNF brain-derived neurotrophic factor, CCL chemokine (C-C motif) ligand, CLIA chemiluminescence immunoassay, CRP C-reactive protein, CSF cerebrospinal fluid, CX3CL CX3 chemokine ligand, ELISA enzyme-linked immunosorbent assay, FOG freezing of gait, G-CSF granulocyte colony-stimulating factor, GM-CSF granulocyte macrophage-colony stimulating factor, IFN interferon, IL interleukin, MSD Meso scale discovery, NLRP3 NOD-like receptor thermal protein domain associated protein 3, PD Parkinson’s disease, PDGF platelet-derived growth factor, PTX3 pentraxin 3, UPDRS Unified Parkinson’s Disease Rating Scale, SIMOA single molecular array, sLAG3 soluble lymphocyte-activation gene 3, STNFR soluble tumour necrosis factor receptor, sTREM2 soluble triggering receptor expressed on myeloid cells 2, sVCAM-1 soluble vascular cell adhesion molecule-1, TGF transforming growth factor, TNF tumour necrosis factor, YKL-40 chitinase protein 40.