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Enhanced myostatin expression and signalling promote tubulointerstitial inflammation in diabetic nephropathy.

ABSTRACT: Myostatin (MSTN), a family member of the transforming growth factor (TGF)-? super family, has been detected in the tubuli of pig kidney, but its role in the human kidney is not known. In this study we observed upregulation of MSTN mRNA (~8 to 10-fold increase) both in the glomeruli and tubulointerstitium in diabetic nephropathy (DN). In DN, immunoreactive MSTN was mainly localized in the tubuli and interstitium (?4-8 fold increase), where it colocalized in CD45⁺ cells. MSTN was also upregulated in the glomeruli and the arterial vessels. Tubulointerstitial MSTN expression was directly related to interstitial fibrosis (r?=?0.54, p?

SUBMITTER: Verzola D

PROVIDER: S-EPMC7156449 | biostudies-literature | 2020 Apr

REPOSITORIES: biostudies-literature

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Enhanced myostatin expression and signalling promote tubulointerstitial inflammation in diabetic nephropathy.

Verzola Daniela D Milanesi Samantha S Viazzi Francesca F Ansaldo Francesca F Saio Michela M Garibaldi Silvano S Carta Annalisa A Costigliolo Francesca F Salvidio Gennaro G Barisione Chiara C Esposito Pasquale P Garibotto Giacomo G Picciotto Daniela D

Scientific reports 20200414 1

Myostatin (MSTN), a family member of the transforming growth factor (TGF)-β super family, has been detected in the tubuli of pig kidney, but its role in the human kidney is not known. In this study we observed upregulation of MSTN mRNA (~8 to 10-fold increase) both in the glomeruli and tubulointerstitium in diabetic nephropathy (DN). In DN, immunoreactive MSTN was mainly localized in the tubuli and interstitium (∼4-8 fold increase), where it colocalized in CD45<sup>+</sup> cells. MSTN was also u ...[more]

PMID: 32286342

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Project description:Several studies have provided compelling evidence implicating the Wnt signalling pathway in the pathogenesis of diabetic nephropathy. Gene expression profiles associated with renal fibrosis have been attenuated through Wnt pathway modulation in model systems implicating Wnt pathway members as potential therapeutic targets for the treatment of diabetic nephropathy. We assessed tag and potentially functional single nucleotide polymorphisms (SNPs; n?=?31) in four key Wnt pathway genes (CTNNB1, AXIN2, LRP5 and LRP6) for association with diabetic nephropathy using a case-control design.SNPs were genotyped using Sequenom or Taqman technologies in 1351 individuals with type 1 diabetes (651 cases with nephropathy and 700 controls without nephropathy). Cases and controls were white and recruited from the UK and Ireland. Association analyses were performed using PLINK, to compare allele and haplotype frequencies in cases and controls. Adjustment for multiple testing was performed by permutation testing.Following logistic regression analysis adjusted by collection centre, duration of T1D, and average HbA1c as covariates, a single SNP in LRP6 (rs1337791) was significantly associated with DN (OR?=?0.74; CI: 0.57-0.97; P?=?0.028), although this was not maintained following correction for multiple testing. Three additional SNPs (rs2075241 in LRP6; rs3736228 and rs491347 both in LRP5) were marginally associated with diabetic nephropathy, but none of the associations were replicated in an independent dataset. Haplotype and subgroup analysis (according to duration of diabetes, and end-stage renal disease) also failed to reveal an association with diabetic nephropathy.Our results suggest that analysed common variants in CTNNB1, AXIN2, LRP5 and LRP6 are not strongly associated with diabetic nephropathy in type 1 diabetes among white individuals. Our findings, however, cannot entirely exclude these genes or other members of the Wnt pathway, from involvement in the pathogenesis of diabetic nephropathy as our study had limited power to detect variants with small effect size.

Dataset Information

Enhanced myostatin expression and signalling promote tubulointerstitial inflammation in diabetic nephropathy.

Publications

Enhanced myostatin expression and signalling promote tubulointerstitial inflammation in diabetic nephropathy.

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