GSE159882: Targeting methylglyoxal in diabetic kidney disease using the novel mitochondria-targeted compound MitoGamide

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GROUP CONDITION SAMPLES
renal cortex
GSM4849303 GSM4849304 GSM4849305 GSM4849306 GSM4849307
GSM4849293 GSM4849294 GSM4849295 GSM4849296 GSM4849297
GSM4849283 GSM4849284 GSM4849285 GSM4849286 GSM4849287
GSM4849278 GSM4849279 GSM4849280 GSM4849281 GSM4849282
GSM4849298 GSM4849299 GSM4849300 GSM4849301 GSM4849302
GSM4849273 GSM4849274 GSM4849275 GSM4849276 GSM4849277
GSM4849288 GSM4849289 GSM4849290 GSM4849291 GSM4849292
GSM4849268 GSM4849269 GSM4849270 GSM4849271 GSM4849272
Description

Submission Date: Oct 22, 2020

Summary: Diabetic kidney disease (DKD) remains the number one cause of end-stage renal disease in the western world. Currently there is no treatment to cure diabetes or deal effectively with its complications. In experimental diabetes, mitochondrial dysfunction in the kidney has been widely reported with changes in mitochondrial bioenergetics preceding the development of the renal lesion. Glucose-derived molecules generated during diabetes, known as dicarbonyls, such as methylglyoxal, are thought to impair mitochondrial function and may contribute to the pathogenesis of DKD. Here, we sought to target methylglyoxal within the mitochondria using MitoGamide, the novel mitochondria-targeted dicarbonyl scavenger, in an experimental model of diabetes. Male 6-week-old heterozygous Akita mice (C57BL/6-Ins2-Akita/J) or wildtype littermates were randomized to receive MitoGamide (10mg/kg/day) or vehicle by oral gavage for 16 weeks. MitoGamide did not alter blood glucose control or body composition. Akita mice exhibited hallmarks of DKD including albuminuria, hyperfiltration, glomerulosclerosis and renal fibrosis, however, after 16 weeks of treatment, MitoGamide did not substantially improve the renal phenotype. Complex-I-linked mitochondrial respiration was increased in the kidney of Akita mice which was unaffected by MitoGamide. Exploratory studies using transcriptomics identified that MitoGamide induced changes to olfactory signalling, immune system, respiratory electron transport and post-translational protein modification pathways. These findings indicate that targeting methylglyoxal within the mitochondria using MitoGamide is not a valid therapeutic approach for DKD and that other mitochondrial targets or processes upstream should be the focus of therapy.

GEO Accession ID: GSE159882

PMID: 33922959

Description

Submission Date: Oct 22, 2020

Summary: Diabetic kidney disease (DKD) remains the number one cause of end-stage renal disease in the western world. Currently there is no treatment to cure diabetes or deal effectively with its complications. In experimental diabetes, mitochondrial dysfunction in the kidney has been widely reported with changes in mitochondrial bioenergetics preceding the development of the renal lesion. Glucose-derived molecules generated during diabetes, known as dicarbonyls, such as methylglyoxal, are thought to impair mitochondrial function and may contribute to the pathogenesis of DKD. Here, we sought to target methylglyoxal within the mitochondria using MitoGamide, the novel mitochondria-targeted dicarbonyl scavenger, in an experimental model of diabetes. Male 6-week-old heterozygous Akita mice (C57BL/6-Ins2-Akita/J) or wildtype littermates were randomized to receive MitoGamide (10mg/kg/day) or vehicle by oral gavage for 16 weeks. MitoGamide did not alter blood glucose control or body composition. Akita mice exhibited hallmarks of DKD including albuminuria, hyperfiltration, glomerulosclerosis and renal fibrosis, however, after 16 weeks of treatment, MitoGamide did not substantially improve the renal phenotype. Complex-I-linked mitochondrial respiration was increased in the kidney of Akita mice which was unaffected by MitoGamide. Exploratory studies using transcriptomics identified that MitoGamide induced changes to olfactory signalling, immune system, respiratory electron transport and post-translational protein modification pathways. These findings indicate that targeting methylglyoxal within the mitochondria using MitoGamide is not a valid therapeutic approach for DKD and that other mitochondrial targets or processes upstream should be the focus of therapy.

GEO Accession ID: GSE159882

PMID: 33922959

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