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. 2020 Jan 2;9(1):124.
doi: 10.3390/jcm9010124.

Association between Circulation Indole-3-Acetic Acid Levels and Stem Cell Factor in Maintenance Hemodialysis Patients: A Cross-Sectional Study

Ping-Hsun Wu  1   2   3   4 , Yi-Ting Lin  1   2   4   5 , Pei-Yu Wu  1   3   6 , Hei-Hwa Lee  6 , Su-Chu Lee  3 , Szu-Chun Hung  7 , Szu-Chia Chen  1   2   3   8 , Mei-Chuan Kuo  2   3   9 , Yi-Wen Chiu  2   3   9
Affiliations

Association between Circulation Indole-3-Acetic Acid Levels and Stem Cell Factor in Maintenance Hemodialysis Patients: A Cross-Sectional Study

Ping-Hsun Wu et al. J Clin Med. .

Abstract

: Protein-bound uremic toxin is a cardiovascular (CV) risk factor for patients with end-stage renal disease. Indole-3-acetic acid (IAA) was found to be associated with CV disease but the detailed pathophysiology remains unknown. Moreover, mitogen-activated protein kinase (MAPK) signaling cascades play an important role in the pathogenesis of CV disease. Thus, we explored the association between circulating IAA levels and forty MAPK cascade associated proteins in patients undergoing hemodialysis (HD). Circulating total form IAA was quantified by mass spectrometry and forty MAPK cascade associated proteins by a proximity extension assay in 331 prevalent HD patients. Accounting for multiple testing, and in multivariable-adjusted linear regression models, circulating total form IAA levels were positively associated with stem cell factor (β coefficient 0.13, 95% confidence interval 0.04 to 0.21, p = 0.004). A bioinformatics approach using the search tool for interactions of chemicals (STITCH) tool provided information that IAA may be involved in the regulation of cell proliferation, hematopoietic cells, and the Janus kinase (JAK)-signal transducer and activator of transcription (STAT) signaling pathway. The knowledge gained here can be generalized, thereby impacting the non-traditional CV risk factors in patients with kidney disease. Further in vitro work is necessary to validate the translation of the mechanistic pathways.

Keywords: hemodialysis; indole-3-acetic acid; mitogen-activated protein kinase cascade proteins; proteomics; uremic toxins.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Study design.
Figure 2
Figure 2
The association between Indole-3-acetic acid and 40 mitogen-activated protein kinase cascade associated proteins in linear regression models with age and sex adjustment.
Figure 3
Figure 3
Volcano plot of the p-value and β coefficient for Indole-3-acetic acid and 40 MAPK cascade associated proteins association with false discovery rate <5% multiple testing control.
Figure 4
Figure 4
Network analysis results using the Search Tool for Interactions of Chemicals (STITCH) tool to explore the link between indole-3-acetic acid and stem cell factor.
See this image and copyright information in PMC

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