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The kidney performs important functions in the human body and can inflict either acute kidney injury (AKI) or chronic kidney disease (CKD). AKI can be induced by kidney ischemia, drugs such as cisplatin, and heavy metals such as cadmium and arsenic. CKD can be induced by drugs, heavy metals, hypertension, and diabetes, as well as cancer. Importantly, nearly all kidney disorders have been shown to involve redox imbalance, reductive stress, oxidative stress, and mitochondrial abnormalities such as impaired mitochondrial homeostasis, including disrupted mitophagy and deranged mitochondrial unfolded protein responses. Understanding how these redox-related dysregulated pathways operate may give us new insights into how to design novel approaches to fighting kidney disease. This Special Issue of Biomolecules entitled “Redox imbalance and mitochondrial abnormalities in kidney disease” covers a variety of topics focusing on oxidative stress, mitochondrial dysfunction, and antioxidation enhancement implicated in kidney disease or kidney transplantation.

diabetic kidney disease --- caloric restriction --- NADH/NAD+ --- redox imbalance --- mitochondrial homeostasis --- mitophagy --- oxidative stress --- kidney allograft --- kidney rejection --- ischemia --- acute kidney injury (AKI) --- chronic kidney disease (CKD) --- tricarboxylic acid (TCA) cycle --- mitochondrial metabolism --- mitochondrial redox signaling --- mitochondrial proteins --- oxidative phosphorylation (OXPHOS) --- fatty acid (FA) β-oxidation --- mitochondrial dynamics --- biogenesis --- diabetes --- kidney --- mitochondria --- Oryza sativa --- rice husk --- TCA cycle metabolites --- kidney diseases --- renalase --- chronic kidney disease --- major adverse cardiovascular outcomes --- cadmium --- kidney injury --- renal toxicity --- oxidative damage --- proximal tubule --- controlled oxygenated rewarming --- mitochondrial uncoupling --- rewarming injury --- temperature paradox --- redox --- mitochondrial dysfunction --- SGLT2 --- mitochondrial reactive oxygen species --- Warburg effect --- podocytopathies --- mitochondrial oxidative stress --- reactive oxygen species (ROS) --- antioxidant defense --- cell death --- n/a

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Acute kidney injury (AKI) is still associated with high morbidity and mortality incidence rates, and also bears an elevated risk of subsequent chronic kidney disease. Although the kidney has a remarkable capacity for regeneration after injury and may recover completely depending on the type of renal lesions, the options for clinical intervention are restricted to fluid management and extracorporeal kidney support. The development of novel therapies to prevent AKI, to improve renal regeneration capacity after AKI, and to preserve renal function is urgently needed. The Special Issue covers research articles that investigated the molecular mechanisms of inflammation and injury during different renal pathologies, renal regeneration, diagnostics using new biomarkers, and the effects of different stimuli like medication or bacterial components on isolated renal cells or in vivo models. The Special Issue contains important reviews that consider the current knowledge of cell death and regeneration, inflammation, and the molecular mechanisms of kidney diseases. In addition, the potential of cell-based therapy approaches that use mesenchymal stromal/stem cells or their derivates is summarized. This edition is complemented by reviews that deal with the current data situation on other specific topics like diabetes and diabetic nephropathy or new therapeutic targets.

microRNAs --- n/a --- transcription --- ischemia/reperfusion injury --- DSS-colitis --- kidney inflammation --- therapeutics targets --- CXCL13 --- glomerulus --- interleukin-6 --- rhabdomyolysis --- IgA nephropathy --- CREB Regulated Transcriptional Coactivators (CRTC) --- slit diaphragm --- injury --- xanthine oxidase --- Salt Inducible Kinase (SIK) --- acute and chronic kidney disease --- therapeutic target --- KIT-IgA score --- G-protein-coupled bile acid receptor (TGR5) --- lysophosphatidic acid --- glomerular injury --- IL-18 --- mesenchymal stem cells --- Taiwan --- acute kidney injury --- renal ischemia-reperfusion --- long non-coding RNA --- fibrosis --- acute kidney failure --- diabetic kidney diseases --- chronic kidney disease --- lncRNA --- LPS-binding protein --- endotoxemia-induced oliguric kidney injury --- dapagliflozin --- cPLA2 and COX-2 --- NLRP3 inflammasome --- CmklR1 --- haem --- chronic kidney injury --- omega-3 fatty acid --- noninvasive --- inflammation --- regulated necrosis --- GLP-1 receptor agonists --- miRNA --- AKI --- SGLT2 inhibitors --- diabetic kidney disease --- extracellular vesicles --- podocin --- type IV collagen --- epithelial cells --- nephrin --- 2-kidney-1-clip --- renal fibrosis --- papilla --- diagnostics --- necrosis --- non-coding RNAs --- podocyte --- Thy1.1 nephritis --- KIT assay --- oxidative stress --- conditioned medium --- C-reactive protein --- pericyte --- myofibroblast --- Nuclear Factor kappa-light-chain-enhancer of activated B cells (NF-?B) --- endotoxemia --- modifier gene --- polymorphism --- renal stem cells --- kidney --- polyploidization --- Class IIa Histone Deacetylases (HDAC) --- 2k1c --- molecular signaling --- proximal tubule --- arachidonic acid --- empagliflozin --- tubular injury --- signaling cascade --- signal transduction --- inflammatory maker --- niches --- biomarkers --- renal progenitors --- type V collagen --- cyclooxygenase --- focal segmental glomerulosclerosis --- inflammatory bowel disease (IBD) --- chronic kidney disease (CKD) --- allograft rejection --- renovascular hypertension --- genotype --- molecular mechanisms --- ROS --- prediction --- glomerular filtration barrier (GFB) --- alport syndrome --- scattered tubular cells --- long non-coding RNAs --- renal inflammation --- lysophosphatidic acid receptor --- cAMP Regulatory Element Binding Protein (CREB) --- Farnesiferol B --- differentiation --- mesenchymal stromal cells --- modified-MSCs --- kidney transplantation --- polyunsaturated fatty acids --- apoptosis --- type I collagen --- diabetes mellitus --- natural products --- lipoxygenase --- stem cell --- T cell-mediated rejection --- exosomes --- renal injury --- obese kidney fibrosis --- kidney injury --- cytotoxicity --- mesenchymal stem cell --- pigment nephropathy --- mesodermal stem cell --- ischemia-reperfusion --- cytochrome P450 --- renal cell carcinoma --- hematuria --- B-cell attracting chemokine --- microRNA --- chemerin --- glomerular basement membrane --- glomerular damage --- renal tubular cells --- kidney proximal tubule --- exosome --- hypertension --- diabetic nephropathy