scholarly journals Significance of the Gut Microbiota in Acute Kidney Injury

Toxins ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 369
Author(s):  
Taku Kobayashi ◽  
Yasunori Iwata ◽  
Yusuke Nakade ◽  
Takashi Wada
Keyword(s):  
Chronic Kidney Disease ◽  
Acute Kidney Injury ◽  
Kidney Disease ◽  
Gut Microbiota ◽  
Kidney Injury ◽  
Protective Effects ◽  
Diseased Condition ◽  
New Treatments ◽  
Established Treatment

Recent studies have revealed that the gut microbiota plays a crucial role in maintaining a healthy, as well as diseased condition. Various organs and systems, including the kidney, are affected by the gut microbiota. While the impacts of the gut microbiota have been reported mainly on chronic kidney disease, acute kidney injury (AKI) is also affected by the intestinal environment. In this review, we discussed the pathogenesis of AKI, highlighting the relation to the gut microbiota. Since there is no established treatment for AKI, new treatments for AKI are highly desired. Some kinds of gut bacteria and their metabolites reportedly have protective effects against AKI. Current studies provide new insights into the role of the gut microbiota in the pathogenesis of AKI.

scholarly journals Role of Parathyroid Hormone Assay and Bedside Ultrasound in the Emergency Department in Differentiating Acute Kidney Injury from Chronic Kidney Disease: A Systematic Review

2019 ◽  
Vol 2019 ◽  
pp. 1-9
Author(s):  
Deepali Junnarkar Roy ◽  
Shrikant Digambarrao Pande ◽  
Zhong Hong Liew ◽  
Debajyoti Roy
Keyword(s):  
Systematic Review ◽  
Chronic Kidney Disease ◽  
Emergency Department ◽  
Acute Kidney Injury ◽  
Parathyroid Hormone ◽  
Kidney Disease ◽  
Kidney Injury ◽  
Bedside Ultrasound ◽  
Ipth Level

Introduction. It is not uncommon for patients without preceding history of kidney disease to present to the Emergency department with renal failure. The absence of prior medical records or renal imaging presents a diagnostic challenge. Elevated parathyroid hormone levels or echogenic contracted kidneys on ultrasound are known to point to a diagnosis of chronic kidney disease. The literature in this regard is surprisingly limited. The objective of this study is to assess the role of intact parathyroid (iPTH) blood level and bedside ultrasound in differentiating acute kidney injury from chronic kidney disease. Methods. A systematic review which included a literature search of 3 databases, PubMed, Embase, and Cinahl (R) as also secondary sources, was done. The inclusion criteria evaluated studies which evaluated iPTH or bedside ultrasound in differentiating acute kidney injury from chronic kidney disease. We excluded studies which used other laboratory biomarkers like neutrophil gelatin associated lipocalin (NGAL) or carbamylated haemoglobin. A total of 2256 articles were identified. After screening, the relevant articles were reviewed, and an assessment of their methodological quality was made based on the CASP: Critical Appraisals Skill Programme. Results. Of the 2256 articles identified, after screening, only 5 were identified as relevant. Conclusions. An elevated parathyroid hormone level and echogenic contracted kidneys on bedside ultrasound in the Emergency department can help differentiate acute kidney injury from chronic kidney disease. This differentiation helps decide need for admission as well as further management. Although iPTH level may also rise in acute kidney injury, the value (2.5 times normal) can discriminate it from chronic kidney disease.

scholarly journals Role of SIK1 in the transition of acute kidney injury into chronic kidney disease

2021 ◽  
Vol 19 (1) ◽  
Author(s):  
Jinxiu Hu ◽  
Jiao Qiao ◽  
Qun Yu ◽  
Bing Liu ◽  
Junhui Zhen ◽  
...  
Keyword(s):  
Chronic Kidney Disease ◽  
Acute Kidney Injury ◽  
Transcription Factor ◽  
Kidney Disease ◽  
Kidney Injury ◽  
High Morbidity ◽  
Mesenchymal Transition ◽  
Immunohistochemistry Staining ◽  
Hk2 Cells

Abstract Background Acute kidney injury (AKI), with a high morbidity and mortality, is recognized as a risk factor for chronic kidney disease (CKD). AKI-CKD transition has been regarded as one of the most pressing unmet needs in renal diseases. Recently, studies have showed that salt inducible kinase 1 (SIK1) plays a role in epithelial-mesenchymal transition (EMT) and inflammation, which are the hallmarks of AKI-CKD transition. However, whether SIK1 is involved in AKI-CKD transition and by what mechanism it regulates AKI-CKD transition remains unknown. Methods We firstly detected the expression of SIK1 in kidney tissues of AKI patients and AKI mice by immunohistochemistry staining, and then we established Aristolochic acid (AA)-induced AKI-CKD transition model in C57BL/6 mice and HK2 cells. Subsequently, we performed immunohistochemistry staining, ELISA, real-time PCR, Western blot, immunofluorescence staining and Transwell assay to explore the role and underlying mechanism of SIK1 on AKI-CKD transition. Results The expression of SIK1 was down-regulated in AKI patients, AKI mice, AA-induced AKI-CKD transition mice, and HK2 cells. Functional analysis revealed that overexpression of SIK1 alleviated AA-induced AKI-CKD transition and HK2 cells injury in vivo and in vitro. Mechanistically, we demonstrated that SIK1 mediated AA-induced AKI-CKD transition by regulating WNT/β-catenin signaling, the canonical pathway involved in EMT, inflammation and renal fibrosis. In addition, we discovered that inhibition of WNT/β-catenin pathway and its downstream transcription factor Twist1 ameliorated HK2 cells injury, delaying the progression of AKI-CKD transition. Conclusions Our study demonstrated, for the first time, a protective role of SIK1 in AKI-CKD transition by regulating WNT/β-catenin signaling pathway and its downstream transcription factor Twist1, which will provide novel insights into the prevention and treatment AKI-CKD transition in the future.

scholarly journals Toll-Like Receptors in Acute Kidney Injury

2021 ◽  
Vol 22 (2) ◽  
pp. 816
Author(s):  
Cristina Vázquez-Carballo ◽  
Melania Guerrero-Hue ◽  
Cristina García-Caballero ◽  
Sandra Rayego-Mateos ◽  
Lucas Opazo-Ríos ◽  
...  
Keyword(s):  
Chronic Kidney Disease ◽  
Acute Kidney Injury ◽  
Kidney Disease ◽  
Pathological Condition ◽  
Kidney Injury ◽  
Preclinical Studies ◽  
Toll Like Receptors ◽  
Middle Income ◽  
Increased Risk

Acute kidney injury (AKI) is an important health problem, affecting 13.3 million individuals/year. It is associated with increased mortality, mainly in low- and middle-income countries, where renal replacement therapy is limited. Moreover, survivors show adverse long-term outcomes, including increased risk of developing recurrent AKI bouts, cardiovascular events, and chronic kidney disease. However, there are no specific treatments to decrease the adverse consequences of AKI. Epidemiological and preclinical studies show the pathological role of inflammation in AKI, not only at the acute phase but also in the progression to chronic kidney disease. Toll-like receptors (TLRs) are key regulators of the inflammatory response and have been associated to many cellular processes activated during AKI. For that reason, a number of anti-inflammatory agents targeting TLRs have been analyzed in preclinical studies to decrease renal damage during AKI. In this review, we updated recent knowledge about the role of TLRs, mainly TLR4, in the initiation and development of AKI as well as novel compounds targeting these molecules to diminish kidney injury associated to this pathological condition.

scholarly journals Deprivation and kidney disease—a predictor of poor outcomes

2019 ◽  
Vol 13 (2) ◽  
pp. 128-132
Author(s):  
Greg D Guthrie ◽  
Samira Bell
Keyword(s):  
Chronic Kidney Disease ◽  
Acute Kidney Injury ◽  
Kidney Disease ◽  
Renal Disease ◽  
Kidney Injury ◽  
Renal Diseases ◽  
Confounding Factors ◽  
Growing Body ◽  
Poor Outcomes

Abstract There is a growing body of evidence for the role of deprivation in a broad spectrum of diseases including renal disease. Deprivation has been demonstrated to be associated with poorer outcomes across a range of renal diseases including acute kidney injury (AKI), chronic kidney disease and transplantation. In this issue of Clinical Kidney Journal, Hounkpatin et al. describe the association of socioeconomic deprivation with incidence, mortality and resolution of AKI in a large UK cohort. Investigating deprivation as a factor influencing either incidence or outcome of disease is challenging due to variations in measures of deprivation used and other confounding factors that may be contributing to the observed differences. In this editorial, we review the current literature examining the role of deprivation in renal disease.

scholarly journals The Cross-Link between Ferroptosis and Kidney Diseases

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Jingyu Wang ◽  
Yi Liu ◽  
Yaqing Wang ◽  
Li Sun
Keyword(s):  
Chronic Kidney Disease ◽  
Acute Kidney Injury ◽  
Cell Death ◽  
Kidney Disease ◽  
Metabolic Disorders ◽  
Kidney Diseases ◽  
Kidney Injury ◽  
Cross Link ◽  
Social Wealth

Acute and chronic kidney injuries result from structural dysfunction and metabolic disorders of the kidney in various etiologies, which significantly affect human survival and social wealth. Nephropathies are often accompanied by various forms of cell death and complex microenvironments. In recent decades, the study of kidney diseases and the traditional forms of cell death have improved. Nontraditional forms of cell death, represented by ferroptosis and necroptosis, have been discovered in the field of kidney diseases, which have reshuffled the role of traditional cell death in nephropathies. Although interactions between ferroptosis and acute kidney injury (AKI) have been continuously explored, studies on ferroptosis and chronic kidney disease (CKD) remain limited. Here, we have reviewed the therapeutic significance of ferroptosis in AKI and anticipated the curative potential of ferroptosis for CKD in the hope of providing insights into ferroptosis and CKD.

scholarly journals A Link between Chronic Kidney Disease and Gut Microbiota in Immunological and Nutritional Aspects

Nutrients ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 3637
Author(s):  
Paulina Mertowska ◽  
Sebastian Mertowski ◽  
Julia Wojnicka ◽  
Izabela Korona-Głowniak ◽  
Ewelina Grywalska ◽  
...  
Keyword(s):  
Chronic Kidney Disease ◽  
Immune System ◽  
Kidney Disease ◽  
Gut Microbiota ◽  
Intestinal Microbiota ◽  
Kidney Diseases ◽  
Disease Onset ◽  
Kidney Injury ◽  
Dietary Factors

Chronic kidney disease (CKD) is generally progressive and irreversible, structural or functional renal impairment for 3 or more months affecting multiple metabolic pathways. Recently, the composition, dynamics, and stability of a patient’s microbiota has been noted to play a significant role during disease onset or progression. Increasing urea concentration during CKD can lead to an acceleration of the process of kidney injury leading to alterations in the intestinal microbiota that can increase the production of gut-derived toxins and alter the intestinal epithelial barrier. A detailed analysis of the relationship between the role of intestinal microbiota and the development of inflammation within the symbiotic and dysbiotic intestinal microbiota showed significant changes in kidney dysfunction. Several recent studies have determined that dietary factors can significantly influence the activation of immune cells and their mediators. Moreover, dietary changes can profoundly affect the balance of gut microbiota. The aim of this review is to present the importance and factors influencing the differentiation of the human microbiota in the progression of kidney diseases, such as CKD, IgA nephropathy, idiopatic nephropathy, and diabetic kidney disease, with particular emphasis on the role of the immune system. Moreover, the effects of nutrients, bioactive compounds on the immune system in development of chronic kidney disease were reviewed.

scholarly journals Epigenetic Modification Drives Acute Kidney Injury-to-Chronic Kidney Disease Progression

Nephron ◽  
2021 ◽  
pp. 1-11
Author(s):  
Zhenzhen Li ◽  
Ningning Li
Keyword(s):  
Chronic Kidney Disease ◽  
Acute Kidney Injury ◽  
Kidney Disease ◽  
Structural Damage ◽  
Epigenetic Modification ◽  
Kidney Injury ◽  
Epigenetic Modifications ◽  
High Morbidity ◽  
Inflammatory Factor

Acute kidney injury (AKI) is a common clinical critical disease. Due to its high morbidity, increasing risk of complications, high mortality rate, and high medical costs, it has become a global concern for human health problems. Initially, researchers believed that kidneys have a strong ability to regenerate and repair, but studies over the past 20 years have found that kidneys damaged by AKI are often incomplete or even unable to repair. Even when serum creatinine returns to baseline levels, renal structural damage persists for a long time, leading to the development of chronic kidney disease (CKD). The mechanism of AKI-to-CKD transition has not been fully elucidated. As an important regulator of gene expression, epigenetic modifications, such as histone modification, DNA methylation, and noncoding RNAs, may play an important role in this process. Alterations in epigenetic modification are induced by hypoxia, thus promoting the expression of inflammatory factor-related genes and collagen secretion. This review elaborated the role of epigenetic modifications in AKI-to-CKD progression, the diagnostic value of epigenetic modifications biomarkers in AKI chronic outcome, and the potential role of targeting epigenetic modifications in the prevention and treatment of AKI to CKD, in order to provide ideas for the subsequent establishment of targeted therapeutic strategies to prevent the progression of renal tubular-interstitial fibrosis.

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