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. 2023 Jul 17;14(7):442. doi: 10.1038/s41419-023-05947-1

Fig. 3. PTAQP4+ modulated RAS and ferroptosis play a pathophysiologic role in PT microenvironment of DKD.

Fig. 3

A WGCNA analysis of transcriptome of PT subtypes of mice. Each leaf (vertical line) in the dendrogram corresponds to a gene. B Module-trait relationship based on WGCNA analysis of PT subtypes of mice. C The network of module 1 of the WGCNA analysis. D Violin plot of AGT in PT subtypes of db/m and db/db mice. E The kidneys of db/m mice and db/db mice were collected and staining by CODEX Multiplexed Tissue Staining. PT (AQP1, green), PTAQP4+ (AQP4, yellow), AGT (pink), DAPI (blue). Scale bars, 180 μm. ▲ (triple stain of AQP1, AQP4 and AGT). F KEGG pathway analysis of module 1 of the WGCNA analysis. G Violin plot of CP in PT subtypes of db/m and db/db mice. H Urinary CP/Cr levels in db/m (n = 6) and db/db mice (n = 6). I The relationship between urinary CP/Cr and albuminuria, NGAL/Cr and Kim-1/Cr in mice. The level of CP, NGAL and Kim-1 in the urine measured using ELISA. Levels of urinary albumin and Cr assessed using the immunoturbidimetric assay and the enzymatic method respectively. J KEGG pathway analysis of module 6 of the WGCNA analysis. K The kidneys of db/m mice and db/db mice were collected and staining by CODEX multiplexed tissue staining. PT (AQP1, red), GPX4 (yellow), and DAPI (blue). Scale bars, 120 μm. L The kidneys of a normal individual and a type 2 diabetes (T2D) patient were collected and staining by Immunohistochemistry (IHC) stain. PT (AQP1, green) and GPX4 (brown). Scale bars, 50 μm. ▲ (double stain of GPX4 and AQP1). The bar graph represents the mean ± S.E.M. *p < 0.05, **p < 0.01, ***p < 0.001 by Student’s t test, and p-value of correlation was analyzed by Spearman analysis.