scholarly journals Dynamic R2' Imaging can Be a Biomarker for Diagnosing and Staging Early Acute Kidney Injury in Animals

2021 ◽  
Vol 8 ◽  
Author(s):  
Bihui Zhang ◽  
Ziping Yao ◽  
Weizheng Gao ◽  
Chengyan Wang ◽  
Hanjing Kong ◽  
...  
Keyword(s):  
Acute Kidney Injury ◽  
Animal Models ◽  
Spin Echo ◽  
Transarterial Embolization ◽  
Kidney Injury ◽  
Clinical Settings ◽  
Spin Echo Sequence ◽  
The Difference ◽  
Asymmetric Spin Echo ◽  
And Control

Background: Early diagnosis of acute kidney injury (AKI) is essential in clinical settings. None of the current biomarkers are widely applied. The combination of pulse-shifting multi-echo asymmetric spin-echo sequence (psMASE) and a modified hemodynamic response imaging (HRI) technique is promising. The purpose of this study was to evaluate the feasibility of psMASE combined with HRI in detecting early ischemic AKI in animal models of different severities.Methods: Twenty rabbits were divided into four groups (mild, moderate, and severe AKI and control groups). Transarterial embolization with different doses of microspheres was performed to establish AKI animal models of different severities. The 3T psMASE and HRI scans of kidneys were conducted. The R2*, R2, and R2' during room air and gas stimulation were acquired and the difference of R2' (dR2') was evaluated in different AKI groups.Results: The values were not different in R2* and R2 during room air and in R2* and R2, and R2' during gas stimulation. The value of R2' was significantly different during room air (P = 0.014), but the difference was only found between control and moderate/severe AKI groups (P = 0.032 and 0.022). The values of dR2' were different among groups (P < 0.0001) and differences between every two groups except comparison of moderate and severe AKI groups were significant (P < 0.01).Conclusion: The dR2' imaging acquired by a combination of renal psMASE and HRI technique can serve as a potential quantitative biomarker for early detection and staging of AKI.

CIRP Secretion during Cardiopulmonary Bypass Is Associated with Increased Risk of Postoperative Acute Kidney Injury

2021 ◽  
Author(s):  
Wenyan Liu ◽  
Yang Yan ◽  
Dan Han ◽  
Yongxin Li ◽  
Qian Wang ◽  
...  
Keyword(s):  
Acute Kidney Injury ◽  
Cardiac Surgery ◽  
Cardiopulmonary Bypass ◽  
Rna Binding ◽  
Multivariable Analysis ◽  
Kidney Injury ◽  
Proinflammatory Response ◽  
Increased Risk ◽  
Before And After ◽  
The Difference

Abstract Background Systemic inflammation contributes to cardiac surgery–associated acute kidney injury (AKI). Cardiomyocytes and other organs experience hypothermia and hypoxia during cardiopulmonary bypass (CPB), which induces the secretion of cold-inducible RNA-binding protein (CIRP). Extracellular CIRP may induce a proinflammatory response. Materials and Methods The serum CIRP levels in 76 patients before and after cardiac surgery were determined to analyze the correlation between CIRP levels and CPB time. The risk factors for AKI after cardiac surgery and the in-hospital outcomes were also analyzed. Results The difference in the levels of CIRP (ΔCIRP) after and before surgery in patients who experienced cardioplegic arrest (CA) was 26-fold higher than those who did not, and 2.7-fold of those who experienced CPB without CA. The ΔCIRP levels were positively correlated with CPB time (r = 0.574, p < 0.001) and cross-clamp time (r = 0.54, p < 0.001). Multivariable analysis indicated that ΔCIRP (odds ratio: 1.003; 95% confidence interval: 1.000–1.006; p = 0.027) was an independent risk factor for postoperative AKI. Patients who underwent aortic dissection surgery had higher levels of CIRP and higher incidence of AKI than other patients. The incidence of AKI and duration of mechanical ventilation in patients whose serum CIRP levels more than 405 pg/mL were significantly higher than those less than 405 pg/mL (65.8 vs. 42.1%, p = 0.038; 23.1 ± 18.2 vs. 13.8 ± 9.2 hours, p = 0.007). Conclusion A large amount of CIRP was released during cardiac surgery. The secreted CIRP was associated with the increased risk of AKI after cardiac surgery.

scholarly journals 2669. Evaluation of Post-Operative Acute Kidney Injury with Piperacillin–Tazobactam Combined with Vancomycin for Lung Transplant Prophylaxis

2019 ◽  
Vol 6 (Supplement_2) ◽  
pp. S936-S936
Author(s):  
Natasha N Pettit ◽  
Cynthia T Nguyen ◽  
Lisa Potter ◽  
Jennifer Pisano
Keyword(s):  
Acute Kidney Injury ◽  
Antibiotic Prophylaxis ◽  
Lung Transplant ◽  
Statistical Significance ◽  
Prophylactic Antibiotic ◽  
Kidney Injury ◽  
Hospital Length ◽  
Hospital Length Of Stay ◽  
Transplant Patients ◽  
The Difference

Abstract Background Several studies have identified that the addition of vancomycin (VAN) to piperacillin–tazobactam (PT) is associated with a higher incidence of nephrotoxicity when compared with other antibiotic regimens. Beginning in June 2017, our lung transplant antibiotic prophylaxis regimen was modified from PT monotherapy to VAN and PT. Methods All adult lung transplant patients between January 1, 2015 and November 10, 2018 were included. Patients were excluded if acute kidney injury (AKI) was present prior to transplant. Rates of AKI within 7 days of transplant were compared between those who received prophylaxis with PT and VAN vs. those receiving alternative regimens (AR). Patients receiving less than 1 dose of vancomycin or less than 3 doses PT (less than 24hours) were deemed to be in the alternative regimen group. AKI was defined as either an increase in serum creatinine (SCr) by ≥0.3 mg/dL within 48 hours or increase in SCr to ≥1.5 times baseline (within 7 days post-transplant). Secondary outcomes included duration of initial prophylactic antibiotic regimens, hospital length of stay (LOS), and all-cause inpatient mortality. Results Eighty-six patients were included, 44 (51%) patients received PT/VAN. Baseline characteristics and results shown in Table 1. Of those receiving PT/VAN for prophylaxis, 24 (54%) developed AKI within 7 days of transplant while 15 (36%) of 42 patients receiving AR developed AKI (P = 0.08). Conclusion A larger proportion of patients that received PT/VAN for transplant antibiotic prophylaxis experienced AKI within 7 days. Although the difference did not reach statistical significance, a 19% higher incidence of AKI warrants need for further investigation. Disclosures All authors: No reported disclosures.

Definitions, classification, epidemiology, and risk factors of acute kidney injury

2018 ◽  
Author(s):  
Eric A. J. Hoste ◽  
John A. Kellum ◽  
Norbert Lameire
Keyword(s):  
Acute Kidney Injury ◽  
Medical Literature ◽  
Kidney Injury ◽  
Staging System ◽  
Acute Kidney Injury Network ◽  
Classification Systems ◽  
Clinical Settings ◽  
Binary Descriptor ◽  
Staging Systems ◽  
Definition Of

The lack of a precise biochemical definition of acute kidney injury (AKI) resulted in at least 35 definitions in the medical literature, which gave rise to a wide variation in reported incidence and clinical significance of AKI, impeded a meaningful comparison of studies.The first part of this chapter describes and discusses different definitions and classification systems of AKI. Patient outcome and the need for renal replacement therapy are directly related to the severity of AKI, an observation that supports the use of a categorical staging system rather than a simple binary descriptor. The severity of AKI is commonly characterized using the relative changes in serum creatinine and urine output. Recently introduced staging systems including the RIFLE classification and the Acute Kidney Injury Network (AKIN) use these relatively simple and readily available parameters allowing the assignment of individual patients to different AKI stages. More recently, a Kidney Disease: Improving Global Outcomes (KDIGO) workgroup developed a consensus-based AKI staging system drawing elements of both RIFLE and AKIN. The potential pitfalls and limitations of the proposed definitions and classifications are briefly described.The second part of the chapter describes the epidemiology of AKI in different clinical settings; the intensive care unit (ICU), the hospitalized population, and the community. The different spectrum of AKI in the emerging countries is discussed and the most important causes and aetiologies of the major clinical types of AKI, prerenal, renal, and post-renal are summarized in table form. Finally the patient survival and renal functional outcome of AKI are briefly discussed

scholarly journals Comparison of 99mTc-DMSA renal scintigraphy with biochemical and histopathological findings in animal models of acute kidney injury

2017 ◽  
Vol 434 (1-2) ◽  
pp. 163-169 ◽  
Author(s):  
Hossein Fatemikia ◽  
Mohammad Seyedabadi ◽  
Zynab Karimi ◽  
Kiarash Tanha ◽  
Majid Assadi ◽  
...  
Keyword(s):  
Acute Kidney Injury ◽  
Animal Models ◽  
Kidney Injury ◽  
Renal Scintigraphy ◽  
Histopathological Findings

scholarly journals Cul4a attenuates LPS-induced acute kidney injury via blocking NF-κB signaling pathway in sepsis

2021 ◽  
Author(s):  
Jing Zhao ◽  
Qiuxia Duan ◽  
Cuihong Dong ◽  
Jing Cui
Keyword(s):  
Oxidative Stress ◽  
Acute Kidney Injury ◽  
Animal Models ◽  
Protective Factor ◽  
Kidney Injury ◽  
Inflammatory Factors ◽  
Common Disease ◽  
Protective Function ◽  
Apoptosis And Inflammation ◽  
End Stage

Background: Acute kidney injury (AKI) is a common disease that can develop into end-stage kidney disease. Sepsis is one of the main causes of AKI. Currently, there is no satisfactory way to treat septic AKI. Therefore, we have shown the protective function of Cul4a in septic AKI and its molecular mechanism. Methods: The cellular and animal models of septic AKI were established by using lipopolysaccharide (LPS). Western blot (WB) was employed to analyze Cul4a expression. RT-qPCR was employed to test the expression of Cul4a, SOD1, SOD2, GPX1, CAT, IL-6, TNF-α, Bcl-2, IL-1β, Bax and KIM-1 mRNA. ELISA was performed to detect the contents of inflammatory factors and LDH. CCK-8 was utilized to detect the cell viability. Flow cytometry was utilized to analyze the apoptosis. DHE-ROS kit was used to detect the content of ROS. Results: Cul4a was down-regulated in cellular and animal models of septic AKI. Oxidative stress is obviously induced by LPS, as well as apoptosis and inflammation. However, these can be significantly inhibited by up-regulating Cul4a. Moreover, LPS induced the activation of the NF-κB pathway, which could also be inhibited by overexpression of Cul4a. Conclusion: Cul4a was found to be a protective factor in septic AKI, which could inhibit LPS-induced oxidative stress, apoptosis and inflammation of HK-2 cells by inhibiting NF-κB pathway.

Acute kidney injury in the tropics

2015 ◽  
Author(s):  
Vivekanand Jha
Keyword(s):  
Public Health ◽  
Acute Kidney Injury ◽  
Kidney Injury ◽  
Tropical Climate ◽  
Public Health Importance ◽  
Productivity Improvement ◽  
Tropical Zone ◽  
Effective Interventions ◽  
The Difference ◽  
The Tropics

The spectrum of acute kidney injury (AKI) encountered in the hospitals of the tropical zone countries is different from that seen in the non-tropical climate countries, most of which are high-income countries. The difference is explained in large part by the influence of environment on the epidemiology of human disease. The key features of geographic regions falling in the tropical zones are climatic, that is, high temperatures and absence of winter frost, and economic, that is, lower levels of income. The causes and presentation of tropical AKI reflect these prevailing cultural, socioeconomic, climatic, and eco-biological characteristics.Peculiarities of tropical climate support the propagation of several infectious organisms that can cause AKI and the disease-transmitting vectors. In contrast to the developed world, where AKI usually develops in already hospitalized patients with multiorgan problems and iatrogenic factors play a major role, tropical AKI is acquired in the community due to issues of public health importance such as safe water, sanitation, infection control, and good obstetric practices. Infections such as malaria, leptospirosis, typhus, HIV, and diarrhoeal diseases; envenomation by animals or insects; ingestion of toxic herbs or chemicals; intravascular haemolysis; poisoning; and obstetric complications form the bulk of AKI in the tropics. Poor access to modern medical facilities and practices such as seeking treatment from traditional faith-healers contribute to poor outcomes.AKI extracts macro- and microeconomic costs from the affected population and reduces productivity. Improvement in the outcomes of tropical AKI requires improvement in basic public health through effective interventions, and accessibility to effective medical care.

scholarly journals Large animal models for translational research in acute kidney injury

Renal Failure ◽  
2020 ◽  
Vol 42 (1) ◽  
pp. 1042-1058
Author(s):  
Balamurugan Packialakshmi ◽  
Ian J. Stewart ◽  
David M. Burmeister ◽  
Kevin K. Chung ◽  
Xiaoming Zhou
Keyword(s):  
Acute Kidney Injury ◽  
Animal Models ◽  
Translational Research ◽  
Kidney Injury ◽  
Large Animal ◽  
Large Animal Models

scholarly journals Fluctuations in Serum Chloride and Acute Kidney Injury among Critically Ill Patients: A Retrospective Association Study

2019 ◽  
Vol 8 (4) ◽  
pp. 447 ◽  
Author(s):  
Tak Kyu Oh ◽  
In-Ae Song ◽  
Young-Tae Jeon ◽  
You Hwan Jo
Keyword(s):  
Acute Kidney Injury ◽  
Confidence Interval ◽  
Critically Ill ◽  
Critically Ill Patients ◽  
Odds Ratio ◽  
Kidney Injury ◽  
Icu Admission ◽  
Serum Chloride ◽  
Increased Risk ◽  
The Difference

Exposure to dyschloremia among critically ill patients is associated with an increased risk of acute kidney injury (AKI). We aimed to investigate how fluctuations in serum chloride (Cl−) are associated with the development of AKI in critically ill patients. We retrospectively analyzed medical records of adult patients admitted to the intensive care unit (ICU) between January 2012 and December 2017. Positive and negative fluctuations in Cl− were defined as the difference between the baseline Cl- and maximum Cl- levels and the difference between the baseline Cl− and minimum Cl− levels measured within 72 h after ICU admission, respectively. In total, 19,707 patients were included. The odds of developing AKI increased 1.06-fold for every 1 mmol L−1 increase in the positive fluctuations in Cl− (odds ratio: 1.06; 95% confidence interval: 1.04 to 1.08; p < 0.001) and 1.04-fold for every 1 mmol L−1 increase in the negative fluctuations in Cl− (odds ratio: 1.04; 95% confidence interval: 1.02 to 1.06; p < 0.001). Increases in both the positive and negative fluctuations in Cl- after ICU admission were associated with an increased risk of AKI. Furthermore, these associations differed based on the functional status of the kidneys at ICU admission or postoperative ICU admission.

Sign in / Sign up

Export Citation Format

Share Document