scholarly journals SAT-302 INHIBITION OF COMPLEMENT C5A/C5A RECEPTOR 1 DECREASES RENAL INJURY IN DIABETIC KIDNEY DISEASE VIA METABOLIC REPROGRAMMING

2019 ◽  
Vol 4 (7) ◽  
pp. S134-S135
Author(s):  
S.M. TAN ◽  
M. Ziemann ◽  
E. Ekinci ◽  
P. Meikle ◽  
M. Cooper ◽  
...  
Diabetes ◽  
2019 ◽  
Vol 69 (1) ◽  
pp. 83-98 ◽  
Author(s):  
Sih Min Tan ◽  
Mark Ziemann ◽  
Vicki Thallas-Bonke ◽  
Matthew Snelson ◽  
Vinod Kumar ◽  
...  

Author(s):  
Vicki Thallas-Bonke ◽  
Sih Min Tan ◽  
Runa S Lindblom ◽  
Matthew Snelson ◽  
Cesare Granata ◽  
...  

Abstract Background The NADPH oxidase isoform, Nox4, mediates reactive oxygen species (ROS) production and renal fibrosis in diabetic kidney disease at the level of the podocyte. However, the mitochondrial localization of Nox4 and its role as a mitochondrial bioenergetic sensor has recently been reported. Whether Nox4 drives pathology in diabetic kidney disease within the proximal tubular compartment, which is densely packed with mitochondria, is not yet known. Methods We generated a proximal tubular specific Nox4 knockout mouse model by breeding Nox4flox/flox mice with mice expressing Cre recombinase under the control of the Sglt2 promoter. Subsets of Nox4ptKO mice and their Nox4flox/flox littermates were injected with streptozotocin (STZ) to induce diabetes. Mice were followed for 20 weeks and renal injury was assessed. Results Genetic ablation of proximal tubular Nox4 (Nox4ptKO) resulted in no change in renal function and histology. Nox4ptKO mice and Nox4flox/flox littermates injected with STZ exhibited the hallmarks of diabetic kidney disease including hyperfiltration, albuminuria, renal fibrosis and glomerulosclerosis. Surprisingly, diabetes-induced renal injury was not improved in Nox4ptKOSTZ mice compared to Nox4flox/flox STZ mice. Although diabetes conferred ROS overproduction and increased mitochondrial oxygen consumption rate, proximal tubular deletion of Nox4 did not normalize oxidative stress or mitochondrial bioenergetics. Conclusion Taken together, these results demonstrate that genetic deletion of Nox4 from the proximal tubules does not influence diabetic kidney disease development, indicating that Nox4 localization within this highly energetic compartment is dispensable for chronic kidney disease pathogenesis in the setting of diabetes.


2019 ◽  
Vol 9 (3) ◽  
pp. 100-104
Author(s):  
Munna Lal Patel ◽  
Rekha Sachan ◽  
Durgesh Pushkar ◽  
Shyam Chand Chaudhary ◽  
Kamlesh Kumar Gupta

2021 ◽  
Vol 12 ◽  
Author(s):  
James Shaffner ◽  
Bohan Chen ◽  
Deepak K. Malhotra ◽  
Lance D. Dworkin ◽  
Rujun Gong

As the prevalence of diabetic kidney disease (DKD) continues to rise, so does the need for a novel therapeutic modality that can control and slow its progression to end-stage renal disease. The advent of sodium-glucose cotransporter-2 (SGLT2) inhibitors has provided a major advancement for the treatment of DKD. However, there still remains insufficient understanding of the mechanism of action and effectiveness of this drug, and as a result, its use has been very limited. Burgeoning evidence suggests that the SGLT2 inhibitors possess renal protective activities that are able to lower glycemic levels, improve blood pressure/hemodynamics, cause bodyweight loss, mitigate oxidative stress, exert anti-inflammatory and anti-fibrotic effects, reduce urinary albumin excretion, lower uric acid levels, diminish the activity of intrarenal renin-angiotensin-aldosterone system, and reduce natriuretic peptide levels. SGLT2 inhibitors have been shown to be safe and beneficial for use in patients with a GFR ≥30mL/min/1.73m2, associated with a constellation of signs of metabolic reprogramming, including enhanced ketogenesis, which may be responsible for the correction of metabolic reprogramming that underlies DKD. This article aims to provide a comprehensive overview and better understanding of the SGLT2 inhibitor and its benefits as it pertains to renal pathophysiology. It summarizes our recent understanding on the mechanisms of action of SGLT2 inhibitors, discusses the effects of SGLT2 inhibitors on diabetes and DKD, and presents future research directions and therapeutic potential.


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