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The Potential Role of Pyrroloquinoline Quinone to Regulate Thyroid Function and Gut Microbiota Composition of Graves’ Disease in Mice


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Fig. 1.

PQQ supplement modulates thyroid function and ameliorates thyroid injury.
A) The concentrations of T4 and B) TRAb levels were determined inserum samples using Mouse ELISA Kit, C) the representative pictures of H&E staining of thyroids (200 × magnification with 100 μm of scale).
Data were represented as mean ± SEM, *p < 0.05, **p < 0.01, ***p < 0.001 between groups. Con – control group, GD – Graves’ disease group, GD + PQQ/low – GD mice treated with 20 mg PQQ/kg BW/day, GD + PQQ/mid – GD mice treated with 40 mg PQQ/kg BW/day, GD + PQQ/high – GD mice treated with 60 mg PQQ/kg BW/day, GD + MMI – GD mice treated with 2.5 mg MMI/kg/BW/day, PQQ – pyrroloquinoline quinone, MMI – methimazole
PQQ supplement modulates thyroid function and ameliorates thyroid injury. A) The concentrations of T4 and B) TRAb levels were determined inserum samples using Mouse ELISA Kit, C) the representative pictures of H&E staining of thyroids (200 × magnification with 100 μm of scale). Data were represented as mean ± SEM, *p < 0.05, **p < 0.01, ***p < 0.001 between groups. Con – control group, GD – Graves’ disease group, GD + PQQ/low – GD mice treated with 20 mg PQQ/kg BW/day, GD + PQQ/mid – GD mice treated with 40 mg PQQ/kg BW/day, GD + PQQ/high – GD mice treated with 60 mg PQQ/kg BW/day, GD + MMI – GD mice treated with 2.5 mg MMI/kg/BW/day, PQQ – pyrroloquinoline quinone, MMI – methimazole

Fig. 2.

PQQ supplement decreases inflammation and oxidative stress response and alleviates small intestine epithelial injury. Relative expression of mRNA in colons of A) IL6, TNFα, B) Nrf2, HO1 was detected by PCR, C) the representative pictures of the hematoxylin and eosin (H&E) staining of colons (200 × magnification with 100 μm of scale).
Data are represented as mean ± SEM, *p < 0.05, **p < 0.01, ***p < 0.001 between groups
PQQ supplement decreases inflammation and oxidative stress response and alleviates small intestine epithelial injury. Relative expression of mRNA in colons of A) IL6, TNFα, B) Nrf2, HO1 was detected by PCR, C) the representative pictures of the hematoxylin and eosin (H&E) staining of colons (200 × magnification with 100 μm of scale). Data are represented as mean ± SEM, *p < 0.05, **p < 0.01, ***p < 0.001 between groups

Fig. 3.

Oral gavage of PQQ restores the diversity of gut microbiota in the GD group.
A) Rank-abundance curves of the gut microbiota at the OTU level, B) rarefaction curves (SOBs index) of the gut microbiota at the OTU level. Comparison of a diversity in C) Sobs, D) Ace, E) Chao indices in Con, GD and PQQ/mid groups at the OTU level. Analysis of β diversity using F) PCA, G) PCoA based on bray_curtis, H) binary_jaccard and I) unweighted_unifrac distance and J) NMDS on the genus level. **p < 0.01; ***p < 0.001. OTUs – operational taxonomic units, PCA – principal component analysis, PCoA – principal coordinate analysis, NMDS – non-metric multidimensional scaling
Oral gavage of PQQ restores the diversity of gut microbiota in the GD group. A) Rank-abundance curves of the gut microbiota at the OTU level, B) rarefaction curves (SOBs index) of the gut microbiota at the OTU level. Comparison of a diversity in C) Sobs, D) Ace, E) Chao indices in Con, GD and PQQ/mid groups at the OTU level. Analysis of β diversity using F) PCA, G) PCoA based on bray_curtis, H) binary_jaccard and I) unweighted_unifrac distance and J) NMDS on the genus level. **p < 0.01; ***p < 0.001. OTUs – operational taxonomic units, PCA – principal component analysis, PCoA – principal coordinate analysis, NMDS – non-metric multidimensional scaling

Fig. 4.

PQQ alters the composition and abundance of intestine flora in the GD group.
A) The species Venn diagram at the genus level. Overlapping parts in the figure indicate common species. On the genus level, percent of community abundance unique to B) the Con group, C) GD group and E) PQQ group. D) Percent of community abundance shared by 3 groups.
PQQ alters the composition and abundance of intestine flora in the GD group. A) The species Venn diagram at the genus level. Overlapping parts in the figure indicate common species. On the genus level, percent of community abundance unique to B) the Con group, C) GD group and E) PQQ group. D) Percent of community abundance shared by 3 groups.

Fig. 4.

PQQ alters the composition and abundance of intestine flora in the GD group.
F) Percent of community abundance of 3 groups on the Phylum level. G) Percent of community abundance of 3 groups on the Genus level. On the genus level, percent of community abundance in H) the Con group, I) GD group and J) PQQ group.
PQQ alters the composition and abundance of intestine flora in the GD group. F) Percent of community abundance of 3 groups on the Phylum level. G) Percent of community abundance of 3 groups on the Genus level. On the genus level, percent of community abundance in H) the Con group, I) GD group and J) PQQ group.

Fig. 4.

PQQ alters the composition and abundance of intestine flora in the GD group.
I) GD group and J) PQQ group. K) The heatmap on the abundance of top 30 genera among 3 groups. L) The Circos analysis of the abundance association between the sample and the top 10 genera.
PQQ alters the composition and abundance of intestine flora in the GD group. I) GD group and J) PQQ group. K) The heatmap on the abundance of top 30 genera among 3 groups. L) The Circos analysis of the abundance association between the sample and the top 10 genera.

Fig. 5.

Spearman correlation analysis and PICRUSt prediction under PQQ supplement in the GD group.
A) Kruskal-Wallis H test validated the differential distributed genera and C) the abundance of Lactobacillus among all 3 groups.
B) LEfSe analysis showed that the relative abundance of 14 genera was significantly different among all groups (LDA score > 3.0 or < –3.0, p < 0.05).
LEfSe – linear discriminant analysis effect size, LDA – linear discriminant analysis, KEGG – Kyoto Encyclopedia of Genes and Genomes, COG – Clusters of Orthologous Groups, RDA – redundancy analysis
Spearman correlation analysis and PICRUSt prediction under PQQ supplement in the GD group. A) Kruskal-Wallis H test validated the differential distributed genera and C) the abundance of Lactobacillus among all 3 groups. B) LEfSe analysis showed that the relative abundance of 14 genera was significantly different among all groups (LDA score > 3.0 or < –3.0, p < 0.05). LEfSe – linear discriminant analysis effect size, LDA – linear discriminant analysis, KEGG – Kyoto Encyclopedia of Genes and Genomes, COG – Clusters of Orthologous Groups, RDA – redundancy analysis

Fig. 5.

Spearman correlation analysis and PICRUSt prediction under PQQ supplement in the GD group.
D) The Heatmap of KEGG pathway, and E) the COG functional abundance box distribution based on the PICRUSt prediction among 3 groups.
LEfSe – linear discriminant analysis effect size, LDA – linear discriminant analysis, KEGG – Kyoto Encyclopedia of Genes and Genomes, COG – Clusters of Orthologous Groups, RDA – redundancy analysis
Spearman correlation analysis and PICRUSt prediction under PQQ supplement in the GD group. D) The Heatmap of KEGG pathway, and E) the COG functional abundance box distribution based on the PICRUSt prediction among 3 groups. LEfSe – linear discriminant analysis effect size, LDA – linear discriminant analysis, KEGG – Kyoto Encyclopedia of Genes and Genomes, COG – Clusters of Orthologous Groups, RDA – redundancy analysis

Fig. 5.

Spearman correlation analysis and PICRUSt prediction under PQQ supplement in the GD group.
D) The Heatmap of KEGG pathway, and E) the COG functional abundance box distribution based on the PICRUSt prediction among 3 groups.
F) RDA results of gut microbiota and environmental factors (T4, TRAB, IL6, TNFα, Nrf2 and HO1) of mice in 3 groups.
G) Network Diagram based on the Collinearity Analysis in 3 groups.
LEfSe – linear discriminant analysis effect size, LDA – linear discriminant analysis, KEGG – Kyoto Encyclopedia of Genes and Genomes, COG – Clusters of Orthologous Groups, RDA – redundancy analysis
Spearman correlation analysis and PICRUSt prediction under PQQ supplement in the GD group. D) The Heatmap of KEGG pathway, and E) the COG functional abundance box distribution based on the PICRUSt prediction among 3 groups. F) RDA results of gut microbiota and environmental factors (T4, TRAB, IL6, TNFα, Nrf2 and HO1) of mice in 3 groups. G) Network Diagram based on the Collinearity Analysis in 3 groups. LEfSe – linear discriminant analysis effect size, LDA – linear discriminant analysis, KEGG – Kyoto Encyclopedia of Genes and Genomes, COG – Clusters of Orthologous Groups, RDA – redundancy analysis

Fig. 5.

Spearman correlation analysis and PICRUSt prediction under PQQ supplement in the GD group.
H) Spearman Correlation Analysis between samples and top 50 genera.
LEfSe – linear discriminant analysis effect size, LDA – linear discriminant analysis, KEGG – Kyoto Encyclopedia of Genes and Genomes, COG – Clusters of Orthologous Groups, RDA – redundancy analysis
Spearman correlation analysis and PICRUSt prediction under PQQ supplement in the GD group. H) Spearman Correlation Analysis between samples and top 50 genera. LEfSe – linear discriminant analysis effect size, LDA – linear discriminant analysis, KEGG – Kyoto Encyclopedia of Genes and Genomes, COG – Clusters of Orthologous Groups, RDA – redundancy analysis
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4 veces al año
Temas de la revista:
Life Sciences, Microbiology and Virology