Decrease In Glomerular Filtration Rate Research Articles

Development of a Model of Tubulointerstitial Fibrosis Using Transient Unilateral Renal Ischemia and Delayed Contralateral Nephrectomy in Domesticated Cats.

Tubulointerstitial fibrosis is a classic histologic feature of chronic kidney disease (CKD) in cats and a final common pathway toward end-stage renal disease. Domesticated cats have been used in models of ischemia-induced renal fibrosis. The objective of this study was to evaluate the performance of 2 variations of a transient unilateral renal ischemia and delayed contralateral nephrectomy model of tubulointerstitial fibrosis in cats. Purpose-bred, young adult, domesticated cats underwent 90 min of surgically induced ischemia to the right kidney followed by delayed contralateral nephrectomy performed 21 d (RI-CN21d group; n = 10) or 90 d postischemia (RI-CN90d group; n = 12). Control cats underwent sham surgery followed by left nephrectomy 21 d after (sham-CN group; n = 3). Renal functional parameters, including glomerular filtration rate and serum creatinine concentration, were evaluated before and after surgeries. The right kidneys were harvested 120 d postischemia/ sham. Renal histology with lesion scoring and histomorphometry for quantification of smooth muscle actin immunolabeling and collagen staining were performed on harvested kidneys. Severe acute kidney injury prompted euthanasia after left nephrectomy in 5/10 (50.0%), 2/12 (16.7%), and 0/3 (0%) of cats in the RI-CN21d, RI-CN90d, and sham-CN groups, respectively. A significant decrease in glomerular filtration rate by day 120, relative to baseline, occurred in cats in the RI-CN21d group (P < 0.001) and RI-CN90d group (P < 0.001) but not the sham-CN group (P = 0.76). All but one cat in the ischemia groups were azotemic at the study end. Kidneys subjected to ischemia had higher interstitial inflammation, tubular atrophy, and fibrosis scores compared with sham-operated kidneys. There were significant increases in smooth muscle actin immunolabeling and collagen staining in these kidneys, relative to the contralateral kidneys. In summary, 90 min of unilateral renal ischemia and delayed contralateral nephrectomy induced histologic and biochemical changes consistent with CKD in cats. A 90-d period between ischemia and nephrectomy resulted in improved survivability of the model.

Effect of potential risk factors on renal functions in simultaneous bilateral total knee arthroplasty.

This retrospective study investigated the risk factors leading to a decrease in Renal glomerular filtration rate (eGFR) and the development of acute kidney injury (AKI) during the early postoperative period in patients undergoing simultaneous bilateral total knee arthroplasty (SBTKA). SBTKA was performed on 862 patients between 2014 and 2021 in a single center, by a single surgeon. The risk factors affecting the development of AKI were analyzed by monitoring the changes in pre-and postoperative serum creatinine (Scr) levels and eGFR values. RIFLE criteria were used to evaluate the kidney functions of the patients, who were followed up for an average of 6 months. While there was no decrease in eGFR or AKI in 818 patients postoperatively, eGFR decreased and AKI of different stages developed in 44 patients, according to the RIFLE criteria. Of the 44 patients with AKI, 31 had Risk, 9 had Injury, 3 had Failure, and one had Loss of kidney function. Two patients with American Society of Anaesthesiologists (ASA) class IV died due to deepening of postoperative renal dysfunction. We found that the direct risk factors in SBTKA in terms of eGFR decrease and AKI development include long operation time, increased need for blood transfusion, and diabetic nephropathy, while increased body mass index (BMI) is an indirect risk factor. When planning for a SBTKA, we presume that a thorough analysis of these factors will decrease AKI risk.

Do Parenteral Iron Therapies Preserve or Deteriorate Kidney Functions? "Iron Carboxy Maltose or Iron Sucrose?"

Treatment of end stage renal disease (ESRD) is based on preserving renal functions. Since renal anemia is frequently detected, we use parenteral iron treatments in patients with chronic kidney disease (CKD). However, there need to be more precise and sufficient studies on the effect of these treatments on the rate of decrease in the glomerular filtration rate (GFR). Therefore, we conducted a study comparing the rates of change in renal function in patients who had used parenteral iron for at least five years. Our study is a retrospective cohort study, and 180 patients with CKD (86 women, 94 men, mean age: 63.5 ± 11.4 years) who had been followed and treated in nephrology outpatient clinics for at least five years and met the study criteria were included in the study. Patients were divided into three groups for iron therapy: not receiving iron therapy, iron carboxy maltose (ICM), and iron sucrose (IS) parenterally. Each group consisted of 60 people. The first and last creatinine and GFR values were compared for a 5-year follow-up in each group. There was no significant difference between the two groups, those using and those not using iron, regarding creatinine increase and GFR decrease rate. Additionally, no significant difference was detected in the GFR decline rates of patients using ICM and IS. This study reduces the concerns that correcting anemia through parenteral iron therapy in patients with CKD may harm renal function.

ERYTHROPOIETIN SYNTESIS IN PATIENTS WITH CHRONIC HEART FAILURE DEPENDING ON COMORBID PATHOLOGY

Introduction. Decreased production of erythropoietin by the kidneys plays crucial role in the development of anemia in patients with chronic heart failure, especially on the background of comorbid diabetes mellitus type 2. In diabetic patients due to early damage of the kidney vessels and following erythropoietin deficiency anemia develops much earlier than clinically significant decrease of glomerular filtration rate.&#x0D; The aim of the study was to find out possible dependence of changes in the erythropoietinsynthesizing function of the kidneys on the degree of severity of anemic hypoxia in elderly and senile patients with chronic heart failure, including those with comorbid type 2 diabetes mellitus.&#x0D; Materials and methods. 120 patients with chronic heart failure of ischemic origin, type 2 diabetes mellitus and mild and moderate anemia were examined. Control group comprised 12 people with chronic heart failure without comorbid pathology. The examined groups were comparable in terms of gender and age, differing in the presence of comorbid diabetes mellitus and degree of severity of anemic syndrome. The level of erythropoietin in blood serum was determined by standard enzymelinked immunosorbent assay.&#x0D; Results. Type 2 diabetes mellitus in patients with chronic heart failure results in a significant decrease in erythropoietin production by 25 % compared to the control group (p&lt;0,05). Comorbid to heart failure anemia leads to an increase in the level of erythropoietin by 74,4 % (р&lt;0,05), and in the case of chronic heart failure and type 2 diabetes mellitus on the background of concomitant anemia – only by 39,5 % (р&lt;0,05). As the severity of anemia in patients with chronic heart failure without diabetes progresses, the severity of the compensatory response of the kidneys to chronic anemic hypoxia is significantly higher than in patients with heart failure and comorbid type 2 diabetes.&#x0D; Conclusions. Diabetic nephropathy in patients with chronic heart failure and comorbid anemia leads to a significant deterioration of the erythropoietin-synthesizing function of the kidneys, complicating the course of both main and comorbid diseases.

A model of hemodialysis after acute kidney injury in rats

BackgroundAcute kidney injury (AKI) is frequent among critically ill patients. Renal replacement therapy (RRT) is often required to deal with severe complications of AKI. This technique is however associated with side effects such as hemodynamic instability and delayed renal recovery. In this study, we aimed to describe a novel model of hemodialysis in rats with AKI and depict a dialysis membrane performance.MethodsEighteen Sprague–Dawley rats received 0.75% adenine-rich diet to induce AKI. After 2 weeks, nine underwent an arterio-venous extracorporeal circulation (ECC) (ECC group) for 2 h without a dialysis membrane on the circuit and nine received a hemodialysis session (HD group) for 2 h with an ECC circuit. All rats were hemodynamically monitored, and glomerular filtration rate (GFR) was measured by transcutaneous fluorescence after the injection of FITC-Sinistrin. Blood samples were collected at different time points to assess serum creatinine and serum urea concentrations and to determine the Kt/V. Sinistrin concentration was also quantified in both plasma and dialysis effluent.ResultsAfter 2 weeks of adenine-rich diet, rats exhibited a decrease in GFR. Both serum urea and serum creatinine concentrations increased in the ECC group but remained stable in the HD group. We found no significant difference in serum creatinine and serum urea concentrations between groups. At the end of experiments, mean serum urea was 36.7 mmol/l (95%CI 19.7–46.9 mmol/l) and 23.6 mmol/l (95%CI 15.2–33.5 mmol/l) in the ECC and HD groups, respectively (p = 0.15), and mean serum creatinine concentration was 158.0 µmol/l (95%CI 108.1–191.9 µmol/l) and 114.0 µmol/l (95%CI 90.2–140.9 µmol/l) in the ECC and HD groups, respectively (p = 0.11). The Kt/V of the model was estimated at 0.23. Sinistrin quantity in the ultrafiltrate raised steadily during the dialysis session. After 2 h, the median quantity was 149.2 µg (95% CI 99.7–250.3 µg).ConclusionsThis hemodialysis model is an acceptable compromise between the requirement of hemodynamic tolerance which implies reducing extracorporeal blood volume (using a small dialyzer) and the demonstration that diffusion of molecules through the membrane is achieved.

The clinical significance of the determination of urinary biomarkers of podocytic damage and fibroangiogenesis in patients with diabetes mellitus

Chronic kidney disease (CKD) in patients with diabetes mellitus (DM) remains a global medical and social problem of the 21st century and the leading cause of end-stage renal disease (ESRD). Kidney damage in diabetes is multifactorial, and diagnosis is often delayed, since structural changes in the glomeruli of the kidneys are detected before the appearance of significant albuminuria (AU) and a decrease in glomerular filtration rate. In this regard, the search for new, early informative biomarkers for the diagnosis of CKD in patients with DM is extremely relevant.Target: To establish the significance of biomarkers of podocyte dysfunction and fibro and angiogenesis excreted in the urine for early diagnosis and assessment of the risk of progression of kidney damage in patients with DM. Materials and Methods: in 74 patients with type 1 and type 2 diabetes (30 and 44, respectively), podocyte proteins and markers of fibro and angiogenesis were determined in the urine by enzyme immunoassay.Results: in patients with diabetes, compared to healthy people, there is increased urinary excretion of podocyte damage markers - nephrin, podocin, and fibroaniogenesis markers – type IV collagen, TGFβ-1, VEGF. Concentrations of nephrin in urine &gt;7.18 ng/U/Cr urine and collagen &gt;12.88 ng/U/Cr urine reliably indicate kidney damage. In patients with diabetes in the absence of traditional signs of CKD, diagnostically significant concentrations of nephrin were detected in 22% of cases, and collagen in 16.6%.Conclusion: determination of nephrin and/or type IV collagen in urine can be used both for early diagnosis and for monitoring kidney damage in diabetes.

Kidney damage in hypertension disease

Essential hypertension (EH) is the most common cardiovascular disease and the leading cause of chronic kidney disease (CKD) worldwide. The aim of the study was to investigate the frequency and nature of kidney damage in hypertension. 189 patients (69 men and 120 women) with hypertension (stages I, II, and III) aged 43 years and older were examined. The average age of the patients was 61.2 ± 8.7 years. Clinical and biochemical tests were conducted on all patients, including red blood cell indices, C-reactive protein (CRP), lipid profile, fibrinogen, electrolytes, glucose, uric acid, creatinine, and cystatin C. The duration of hypertension was also recorded for each patient. Kidney function was assessed using serum creatinine (CKD-EPI) and cystatin C (F. Houcke). Patients were categorized according to the degree of decrease in glomerular filtration rate (GFR) based on the recommendations of the Russian Nephrology Society. Patients with kidney damage were divided into two groups: Group 1 consisted of patients with hypertension without signs of CKD (GFR calculated by cystatin C ≥ 60 ml/min), while Group 2 consisted of patients with hypertension complicated by CKD. The results showed that hypertension was accompanied by target organ damage in 70.8% of cases. The prevalence of CKD among patients with hypertension was 28.5%. Proteinuria was mainly detected in patients with renal insufficiency. The frequency of GFR categories according to CKD-EPI and F. Houcke formulas was as follows: G1 — 54.4% and 13.7% (p &lt; 0.05); G2 — 35.9% and 57.6% (p &lt; 0.05); G3a — 5.2% and 19.5% (p &lt; 0.05); G3b — 3.1% and 5.2% (p &lt; 0.05); G4 — 0.5% and 3.1% (p &lt; 0.05) and G5 — 0.5% and 0.5%, respectively. There was a strong correlation between GFR and serum creatinine (r = –0.439; p &lt; 0.05) and cystatin C (r = –0.866; p &lt; 0.0001). Patients in Group 2 (hypertension with kidney damage) had significantly higher levels of CRP, low-density lipoprotein cholesterol, cystatin C, and longer duration of hypertension, but lower levels of total calcium than patients in Group 1. In conclusion, CKD was present in 28.5% of patients with hypertension, and proteinuria was mainly detected in patients with renal insufficiency. Serum cystatin C levels most accurately reflect kidney filtration function.

STUDY ON CARDIAC MANIFESTATIONS IN CKD PATIENTS IN A TEACHING HOSPITAL

Introduction: An independent risk factor for the development of cardiovascular abnormalities may be a little decrease in glomerular filtration rate, since chronic kidney disease (CKD) has a strong correlation with cardiac illnesses. In addition to hastening the course of vascular disease, the combination of risk factors is linked to an increased incidence of ventricular hypertrophy, myocardial fibrosis, valvopathy, arrhythmia, ischemia, and sudden death. When circulatory abnormalities in CKD are identified early, morbidity and mortality can be decreased, and quality of life can be raised. Aims: The aim of the study was to study cardiac manifestations in CKD. Methods: The study involved 140 instances of CKD that were admitted to the general medicine department of Al Ameen Medical College in Bijapur, Karnataka. Results: According to our study, there were 31.4% (44/140) instances of left ventricular hypertrophy (LVH), 13.5% (19/140) of LAD, 18.1% (20/140) of conduction abnormalities, 15.7% (22/140) of ischemia, 2.1% (3/140) of arrhythmias, 2.8% (4/140) of P-mitrale, and 21.4% (30/140) of normal cases. Conclusion: Echocardiography is a non-invasive, secure, user-friendly, and precise method for evaluating heart function in patients with chronic renal disease. When it comes to identifying LVH, echocardiography is more accurate. When it comes to CKD patients, cardiovascular problems are the main cause of morbidity and death.

Identification of ferroptosis-related genes in acute kidney injury by bioinformatic analysis

ABSTRACT Background: Acute kidney injury (AKI) is a rapid decline in renal function characterized by a decrease in glomerular filtration rate in a short period. Ferroptosis affects the development of various kidney diseases. Therefore, searching for genes related to ferroptosis is crucial for understanding the occurrence and development of AKI. Methods: We obtained data from 18 samples (8 with acute kidney injury and 10 non-pathological tissue) in GSE53769 and 48 samples (39 with acute kidney injury and 9 non-pathological tissue) in GSE139061. We obtained differentially expressed genes (DEGs) of AKI/Control samples from both two datasets and intersected them with known ferroptosis-related genes (FRGs) to obtain ferroptosis-related DEGs (FRDEGs). GO annotation, KEGG pathway analysis, and GSEA analysis were conducted on the FRDEGs to understand their enriched biological functions and pathways. Next, we constructed the protein-protein interaction (PPI) network. Results: A total of 312 genes were obtained, which were abnormally expressed in both two datasets. After intersecting with known FRGs, 14 FRDEGs were obtained, namely ACSF2, ADIPOR1, ARF6, ATF3, ATF6, DPEP1, FH, GLRX5, MIOX, NAP1L1, NDRG1, PPARA, SPHK1, YY1AP1. The results of the immune infiltration analysis showed that multiple gene expressions among 14 genes are correlated with immune cell infiltration. Conclusion: Fourteen ferroptosis genes (ACSF2, ADIPOR1, ARF6, ATF3, ATF6, DPEP1, FH, GLRX5, MIOX, NAP1L1, NDRG1, PPARA, SPHK1, YY1AP1) are involved in the occurrence and development of AKI, among which NDRG1 might be the core functional gene, and PPARA is expected to become the most effective therapeutic target gene.

Acute kidney injury as the onset of cystic fibrosis in a child of 1 year of age

Early diagnosis of the cystic fibrosis remains an urgent problem, despite ongoing nationwide neonatal screening. The uniqueness of the presented clinical case lies in the atypical onset of cystic fibrosis in a young child with clinical manifestations of acute kidney injury. The suddenly developed severe general condition in a child was due to manifestations of acute renal injury of the third stage (severe lethargy, anuria for 14 hours, an increase in blood creatinine to 121 µmol/L, a decrease in glomerular filtration rate to 17.4 mL/min), decompensated metabolic alkalosis with hypokalemia, hyponatremia, hypocalcemia (pH 7.6, K+ 2.6 mmol/L, Na+ 118 mmol/L, Ca2+ 0.96 mmol/L, HCO3 – 35.5 mmol/L). The observed disturbances in acid-base status and electrolyte metabolism were manifestations of the pseudo-Bartter syndrome. For the prevention of acute kidney injury in a patient with cystic fibrosis, timely electrolyte and fluid management is important to prevent the development of pseudo-Bartter’s syndrome, exsicosis and hypovolemia.

Changes in renal volume post Percutaneous nephrolithotomy based on ultrasonography and its correlation with glomerular filtration rate (GFR).

Percutaneous nephrolithotomy (PCNL) is considered to be the gold standard management for renal calculi. The purpose of this study is to comprehend the overall alterations in renal volume occurring after PCNL. The changes in the kidney's total volume in individual patients will be examined by ultrasonography pre and postoperatively, and it will be correlated with GFR. It was a prospective observational study performed over 70 participants, conducted at the department of Urology of a tertiary care hospital in Eastern India. Each patients were evaluated with pre and post PCNL USG for kidney volume and GFR. The data was statistically evaluated by SPSS software. The preoperative and post operative calculated mean GFR was 96.030 ± 18.922 ml and 86.681 ± 16.938 ml,volume was 127.258 ± 25.705 and 123,678 ± 26.357 respectively . There was statistically significant decrease in GFR and volume following PCNL. It also shows that patients who underwent single puncture PCNL had significantly less decrease in GFR and kidney volume compared to multiple puncture PCNL. Moreover, the calculated mean change in GFR and volume were significantly less seen in single puncture-one step dilatation and single puncture-serial dilatation as compared to multiple puncture-one step dilatation and multiple puncture-serial dilatation. Our study showed that there was significant changes in the renal volume and GFR following PCNL . So, a sonographic estimation of renal dimensions and GFR calculation after PCNL will help in the prognosis and further follow up of patients. A Single puncture had a better operative outcome and less adverse consequences with respect to GFR, volume change and for renal function as compared to multiple puncture.

Effect of finerenone in patients with chronic kidney disease and type 2 diabetes by baseline anaemia status: a FIDELITY analysis

Abstract Introduction Anaemia is a common complication affecting ∼42% patients with chronic kidney disease (CKD) stages 3–5 at 1 year after diagnosis and ∼67% at 5 years, with prevalence increasing as estimated glomerular filtration rate (eGFR) decreases. Despite the fact that anaemia is associated with CKD progression, adverse cardiovascular (CV) events and premature mortality in patients with CKD, management of these patients remains suboptimal. The nonsteroidal mineralocorticoid receptor antagonist finerenone demonstrated significant cardiorenal benefits in patients with CKD and type 2 diabetes (T2D) in FIDELITY (a prespecified pooled analysis of the phase III FIDELIO-DKD and FIGARO-DKD trials). However, the effect of anaemia on CV and kidney outcomes in patients receiving finerenone has not been established. Purpose This post hoc analysis investigated the treatment effects and safety of finerenone vs placebo in patients categorised by baseline anaemia status. Methods Eligible patients with CKD (urine albumin-to-creatinine ratio [UACR] ≥30–&amp;lt;300 mg/g and eGFR ≥25–≤90 ml/min/1.73 m² or UACR ≥300–≤5000 mg/g and eGFR ≥25 ml/min/1.73 m²) and T2D, and on optimised renin–angiotensin system inhibitor were randomised 1:1 to finerenone or placebo. Anaemia was defined using the World Health Organization criteria: serum haemoglobin levels &amp;lt;13 g/dl (male) or &amp;lt;12 g/dl (female) or treatment with an erythropoiesis-stimulating agent at baseline. Key outcomes analysed by baseline anaemia status included a CV composite (CV death, nonfatal myocardial infarction, nonfatal stroke, or hospitalisation for heart failure [HHF]) and kidney composite (kidney failure, sustained eGFR decrease ≥57%, or kidney-related death), HHF, and all-cause mortality. Safety outcomes were assessed by treatment-emergent adverse events. Results Of 13,007 patients, 4293 (33.0%) had anaemia at baseline. The risk reduction on the CV composite outcome was nominally significant with finerenone vs placebo in patients with anaemia at baseline but not in those without (p-value for interaction=0.04; Figure 1). Finerenone also reduced the risk of the kidney composite outcome vs placebo, with no heterogeneity between the treatment groups and across the anaemia subgroups (Figure 1). In addition, finerenone was associated with a reduced risk of all-cause mortality and HHF outcomes vs placebo, irrespective of baseline anaemia status (Figure 1). Incidence of treatment emergent hyperkalaemia was higher in patients with anaemia at baseline in both treatment arms (21.2% finerenone vs 11.5% placebo) compared to those without anaemia (10.5% finerenone vs 4.6% placebo). Conclusions In patients with CKD and T2D, anaemia was found to be a modifier to the effect of finerenone on the CV composite outcome. There was no heterogeneity of treatment effects with finerenone vs placebo, by anaemia at baseline, on kidney composite outcome, all-cause mortality and HHF.

Correlation between Neutrophil-Lymphocyte Ratio and Urea Serum in Hemodialysis Patients at Dr. Doris Sylvanus Hospital

Chronic Kidney Disease (CKD) is a condition characterized by kidney damage for &gt; 3 months, as well as structural or functional abnormalities with or without a decrease in Glomerular Filtration Rate (GFR) &lt; 60 mL/minute/1.73. This damage leads to increased urea levels in the blood, also known as uremia, which can increase the risk of inflammation in CKD patients undergoing hemodialysis (HD). Previous studies revealed that increased urea and Neutrophil-Lymphocyte Ratio (NLR) can be used as inflammatory biomarkers to replace CRP, IL-6, and other indicators. This study aimed to determine the correlation between NLR and serum urea levels in pre- and post-HD CKD patients at Dr. Doris Sylvanus Hospital. An analytical survey method was used with a retrospective design.The process started by taking medical records of patients currently undergoing HD who were selected as respondents. The sample population consisted of 50 (70.4%) males and 21 (29.6%) females. Based on the age group, 43.7% of patients were aged 51-60. The results showed that the average NLR pre- and post-HD were 5.24±4.88 and 10.41±12.31, respectively. The average urea pre- and post-HD were 195.97±77.88 and 120.97±47.4, respectively. The bivariate analysis showed a significant weak correlation between NLR and serum urea level pre-HD (p=0.004 with r =0.338) and post-HD (p=0.039 with r =0.246) in patients.

Association between intestinal microflora and renal function in patients with chronic renal failure: A case-control analysis.

To identify the association between the changes in intestinal microflora and renal function in patients with chronic renal failure (CRF). This retrospective case-control study included 50 patients with CRF (study group), admitted to the Clinical Laboratory Department of Shenzhen People's Hospital from March 2021 to May 2022, and 50 healthy individuals (control group). The association between the distribution of intestinal microflora and the glomerular filtration rate (GFR), levels of serum creatinine (SCr), blood urea nitrogen (BUN), and serum cystatin C (CysC) were analyzed. Intestinal microflora of CRF patients had significantly higher levels of Enterococci compared to the control group (p-Value <0.05), while the levels of Bifidobacterium spp. and Escherichia coli were lower in the study group (p-Value <0.05). GFR was lower, and the levels of BUN, SCr, and CysC were higher in the study group compared to the control group (all p-Value <0.05). GFR, BUN, SCr and CysC levels in the study group negatively correlated with the levels of Bifidobacterium spp. and Lactobacillus spp. (r<0, P<0.05), and positively correlated with the abundance of Enterococcus spp. and Escherichia coli (r>0, P<0.05) in the intestinal microflora. Changes in intestinal microbiota are associated with a significant decrease in GFR and a marked increase in serum levels of renal function indicators, and alterations in the balance of intestinal microbiota may lead to further aggravation of the renal function damage in patients with CRF.

Renal function during long-term therapy with rituximab in patients with systemic sclerosis

In systemic sclersis (SSc), different types of renal involvement occur. Their severity can range from asymptomatic deterioration of renal function to life-threatening damage, which is a complex therapeutic problem. Rituximab (RTM) has been used in the treatment of SSc and other autoimmune diseases with promising results, but its effect on renal function has not been adequately studied. Objective: to evaluate the renal function during complex therapy, including RTM, in patients with SSc over a long-term follow-up (at least 1 year). Material and methods. The study included 90 patients with SSc who were examined at least twice – before and 1–3.5 years after initiation of RTM treatment. Renal function was assessed by glomerular filtration rate (GFR) calculated according to the CKD-EPI formula. The stages of chronic kidney disease (CKD), blood pressure, daily proteinuria, skin score, activity, and indicators of lung function – forced vital capacity and diffusing capacity of the lungs – were also determined. Results and discussion. Against the background of complex therapy with RTM, there was a statistically significant decrease in GFR in the entire group of patients at the end of observation. On the other hand, renal function remained stable in the majority of patients with initially preserved GFR and there was a 25 % decrease – from 20 to 15 patients – in the number of patients with CKD. In more than half of the patients who initially had CKD, GFR increased (n = 11) or stabilized (n = 2) after therapy, and it decreased in a statistically insignificant manner in only 7 patients, whereas the development of a more advanced stage of CKD was observed in only 2 cases. The results of the treatment of 2 patients who had previously experienced scleroderma renal crisis (SRC) are reviewed in detail. Conclusion. In this study, there was no significant effect of RTM treatment on GFR and grade of CKD. Most patients had stable renal function; patients with an initial low grade of CKD showed a tendency toward stabilization of renal function. A significant decrease in GFR during long-term therapy noted in the entire patient group appears to be explained by an increase in renal insufficiency in patients with initially severe scleroderma renal damage, particularly due to SRC. Further studies on the effects of RTM therapy on renal function in patients with SSc are needed.

Postpartum progression of chronic kidney disease in patients with chronic glomerulonephritis

Background: In the recent years, pregnancy outcomes in women with primary chronic glomerulonephritis (CGN) have been encouraging despite increased incidence of complications and preterm birth. However, the impact of pregnancy on CKD progression in glomerulonephritis remains understudied.&#x0D; Aim: To evaluate the effect of pregnancy on CKD progression in the postpartum period in patients with primary CGN.&#x0D; Materials and methods: This was an observational longitudinal study. The study group included 40 patients with CGN and CKD G1G3b, who had 40 deliveries from January 2009 to November 2022. The control group included 35 patients with CGN who had no pregnancies after CKD was diagnosed. Serum creatinine and estimated glomerular filtration rate (GFR) were assessed during the follow up, recording the development of CKD G5.&#x0D; Results: The annual rate of GFR decline in the study group was -4.6 [-8.0; -2.5] ml/min/1.73 m2, and in the control group -1.8 [-5.8; +1.5] ml/min/1.73 m2 (p = 0.056). After complicated pregnancy (preeclampsia, placental insufficiency, increase in proteinuria, worsening of arterial hypertension, acute kidney injury), the annual rate of GFR decline was -6.4 [-13.4; -3.5] ml/min/1.73 m2, which was higher than in the controls (p = 0.042). There were no significant differences in survival without GFR decrease by 30%, 50% and without CKD G5 between the study and the control groups. However, CKD G5-free survival in the patients with complicated pregnancy was lower than that in the controls (p = 0.022) and in those with uncomplicated pregnancies (p = 0.009).&#x0D; Eleven (11) of 40 patients in the main group and 3/35 in the control group reached CKD G5. The time from delivery to CKD G5 was 4.83 [2.08; 7.07] years. Among women who reached end-stage renal failure after childbirth, there were significantly more patients with CKD G3, proteinuria 1 g/day during pregnancy, arterial hypertension at baseline and during pregnancy, preeclampsia, acute kidney injury, delivery at less than 37 weeks of gestation, with neonates requiring treatment at intensive care unit, and unfavorable pregnancy outcomes.&#x0D; Conclusion: Renal survival in the women with primary CGN who had been pregnant was not significantly different from that in the women who did not have pregnancies; however, complicated pregnancy increased the rate of kidney function decline.

Prospective validation of an equation based on plasma cystatin C for monitoring the glomerular filtration rate in children treated with cisplatin or ifosfamide for cancer.

We recently proposed an equation to estimate the glomerular filtration rate (GFR) in children with cancer based on plasma cystatin C and serum creatinine levels together with body weight (the "CysPed equation"). The current clinical study reports a prospective evaluation of this equation in 18 children treated by nephrotoxic chemotherapy. The CysPed equation resulted in less bias and greater precision compared to two equations previously proposed equations by Schwartz, with or without plasma cystatin C. Moreover, the decrease in GFR due to chemotherapy was clearly identified by the CysPed equation. This equation may be used to monitor the renal function in childhood cancer units.

Renal function in very old critically ill patients.

Current demographic change leads to higher number of elderly patients admitted to an ICU. Among other organs also the kidneys show age-related changes, which are associated with a decline in various aspects of renal function. The purpose of this review is to provide an overview of structural and functional changes in elderly and also to specifically address the increased risk of acute kidney injury (AKI) in this population. Ageing in the kidneys is affected by many different factors, such as low grade chronic inflammation, called inflammageing, and various comorbidities. Nevertheless, a decrease of glomerular filtration rate (GFR) occurs independent of the presence of comorbidities and a steady decline of GFR has been reported in both healthy men and women. Pharmacodynamic of many drugs is altered by these changes. Additionally the rate of diuretic resistance appears to be increased. The cause of AKI occurrence in older age is, multifactorial and includes preventable triggers (hypovolemia, hypotension, nephrotoxins) as well as changes associated with aging. Age-related alterations of the kidneys were found at microscopic and macroscopic levels of the cell. These changes lead to a reduced renal reserve and subsequently to an increased vulnerability of aged kidneys when an additional stressor is added. Age is an independent risk factor for developing AKI. Physicians should take into account the altered renal function in elderly patients and take renal protective measures at an early stage.

Объем интраоперационной кровопотери и функциональное состояние почек при различных способах хирургического лечения крупных и сложных камней почек.

Introduction. Despite the development of minimally invasive technological methods for the treatment of urolithiasis, improving the functional state of the kidneys in the postoperative period does not lose its importance at the present time. The decrease and loss of renal function after surgical treatment of complex forms of nephrolithiasis in various ways creates the problem of choosing one or another surgical technique in order to avoid negative results of surgical treatment. modern urology. Purpose of the work: to assess the correlation between the volume of intraoperative blood loss and dynamic changes in glomerular filtration rate (GFR) in the postoperative period with various methods of surgical treatment of large and complex kidney stones. Purpose: to assess the correlation between the volume of intraoperative blood loss and dynamic changes in the GFR in the postoperative period with various methods of surgical treatment of large and complex kidney stones. Materials and methods. The study selected data from 97 patients with urolithiasis, large and complex kidney stones of the urological department of the city hospital No 2 of the city of Nur-Sultan of the Republic of Kazakhstan. The median age was 52 (23–73) years. The average area of a kidney stone was 428.3±36.1 mm2, its average density according to Hounsfield was 1042.9±34.8 HU. All patients were divided into 3 cohort comparison groups according to the method of surgical treatment: percutaneous nephrolithotripsy (PCNL) on prone position (1 group) – 44 patients (45.4%), PCNL on the supine position (2 group) – 29 patients (29.9%), laparoscopic pyelolithotomy (3 group)– 24 patients (24.7%). The median baseline GFR in the 1 group was 91 ml/min/1.73 m2, in the 2 group 95 ml/min/1.73 m2, in the 3 group 101 ml/min/1.73 m2. The average duration of surgical intervention for 1 group was 92.8±6.8 min, for 2 group – 119.6±10.9 min, for 3 group-146.9 ± 6.1 min. The mean blood loss in 1 group was 144.5±9.1 ml, in 2 group 235.3±19.1 ml, in 3 group 43.1±5.2 ml. Results. A decrease in GFR below 60 (ml/min/1.73 m2), corresponding to stage III of chronic kidney disease (CKD), was most pronounced in the 2 group: from 3 (3.1%) cases before surgery to 7 (7.2%) cases in postoperative period. A decrease in GFR below 30 (ml/min/1.73 m2), which corresponds to stage IV CKD, also had negative dynamics in the group of patients with 2 group: from 2 (2.1%) to 3 (3.1%) cases respectively. In the rest of the studied groups, there was no negative dynamics of GFR. A correlation was found between GFR in the postoperative period and intraoperative blood loss (r = 0.410, p&lt;0.001). Conclusions. Surgical treatment of urolithiasis of the kidneys is associated with risks of intraoperative blood loss, the volume of which directly correlates with the deterioration of the functional state of the kidneys in the postoperative period. Reducing the volume of intraoperative blood loss in various surgical methods for the treatment of urolithiasis helps to minimize the risk of developing acute kidney injury in the postoperative period.

Association Between Monocyte-to-High-Density Lipoprotein (HDL) Cholesterol Ratio and Proteinuria in Patients With Type 2 Diabetes Mellitus: A Prospective Observational Study.

Background Diabetes mellitus (DM) refers to a group of metabolic disorders that share the phenotype of hyperglycemia. "Diabetic nephropathy (DN)" is a microvascular complication of DM, and it is the leading cause of end-stage renal failure. Increased urinary albumin excretion (UAE) and a decrease in glomerular filtration rate (GFR) are associated with DN along with elevated blood pressure and end-stage renal disease (ESRD). The purpose of this study is to analyze the prognostic significance of the monocyte-to-high-density lipoprotein (HDL) cholesterol ratio (MHR) in DN patients. Materials and methods This prospective observational study was carried out over a period of 1.5 years, with patients being followed up for three months. One hundred twenty participants were enrolled and allotted into groups based on the measure of urine albumin-to-creatinine ratio (UACR). The participants were categorized into healthy individuals, normoalbuminuric diabetic patients, microalbuminuric diabetic patients, and macroalbuminuric diabetic patients group. The MHR, neutrophil-to-lymphocyte ratio (NLR), and platelet-to-lymphocyte ratio (PLR) were estimated and compared between the baseline measurements. Conclusion The MHR, NLR, and PLR showed a positive correlation with UACR levels which could serve as an inflammatory marker and be used as an inexpensive and accessible prognostic marker in DN patients.