Is idiopathic recurrent calcium urolithiasis in males a cellular disease? Laboratory findings in plasma, urine and erythrocytes, emphasizing the absence and presence of stones, oxidative and mineral metabolism: an observational study

2005 ◽  
Vol 43 (6) ◽  
Author(s):  
Paul Otto Schwille ◽  
Mahimaidos Manoharan ◽  
Angelika Schmiedl
Keyword(s):  
Ascorbic Acid ◽  
Uric Acid ◽  
Plasma Levels ◽  
Mineral Metabolism ◽  
Stone Formation ◽  
Healthy Controls ◽  
Laboratory Findings ◽  
Cross Sectional ◽  
Calcium Urolithiasis

AbstractBackground: The site of origin of idiopathic recurrent calcium urolithiasis (IRCU) – a disorder characterized by stones composed of calcium oxalate (CaOx) and/or calcium phosphate (CaPi) – is uncertain, because in urine such risk factors for stones as disturbed Ox, Ca and Pi are not regularly observed. Aims: To evaluate whether imbalance of antioxidants and oxidants might be present in IRCU patients that is then followed by abnormal urine, plasma and intracellular mineral homeostasis, and stones. Methods: Males were investigated in the laboratory under standardized conditions, and three trials were organized. Trial 1 was cross-sectional, comparing IRCU patients with (n=111) and without stones in situ (n=126), focussing on abnormalities of oxypurines and minerals in urine and plasma, and metabolic activity (MA) of the disease. Trial 2 was partly controlled (n=14 healthy subjects; n=53 IRCU patients), comparing the plasma levels of total antioxidant status (TAS) and uric acid, the major antioxidant in humans, using the subsets Low (n=26) and High (n=27) TAS among IRCU patients in terms of plasma levels of uric acid, ascorbic acid, albumin, α-tocopherol and minerals, urinary minerals, CaOx and CaPi (hydroxyapatite) supersaturation. Trial 3, comprising stone-free IRCU patients (n=8) and healthy controls (n=8), compared minerals and mineral ratios in plasma and red blood cells (RBCs). Established analytical methodologies were used throughout. Results: In trial 1, uricemia, hypoxanthinuria and proteinuria were elevated, fractional urinary clearance (FE) of uric acid was decreased in stone-bearing patients, and MA correlated positively with uricemia and urinary total protein excretion. In trial 2, TAS was significantly decreased in IRCU patients vs. healthy controls; low TAS coincided with low plasma uric acid and albumin, unchanged ascorbic acid, α-tocopherol and parathyroid hormone, but increased FE-uric acid and Pi excretion; the latter correlated negatively with TAS. In trial 3, plasma minerals were significantly decreased in IRCU patients vs. controls, and Ca/Pi, (Ca/Pi)/Mg and (Ca/Pi)/Na molar ratios increased; the latter ratio was also increased in RBCs, and correlated highly positively with the same ratio in plasma. Conclusions: In IRCU 1) renal stones in situ in combination with high fasting uricemia, high hypoxanthinuria and protein-uria, and high MA suggest that a systemic metabolic anomaly underlies stone formation; 2) antioxidant deficit is frequent, unrelated to the presence or absence of stones but apparently related to poor renal uric acid recycling, low uricemia and albuminemia, exaggerated urinary Pi excretion, and low MA; 3) the combination of low plasma TAS, disordered Ca/Pi and other mineral ratios in urine, plasma and RBCs, but unchanged urinary Ca salt supersaturation is compatible with the view that CaPi solid and Ca microlith formation start inside oxidatively damaged cells.

scholarly journals Association of serum uric acid levels with suicide risk in female patients with major depressive disorder: a comparative cross-sectional study

2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Jing-Xu Chen ◽  
Jun-Hui Feng ◽  
Li-Gang Zhang ◽  
Yan Liu ◽  
Fu-De Yang ◽  
...  
Keyword(s):  
Major Depressive Disorder ◽  
Uric Acid ◽  
Depressive Disorder ◽  
Suicide Risk ◽  
Serum Levels ◽  
Binary Logistic Regression Analysis ◽  
Healthy Controls ◽  
Major Depressive ◽  
Cross Sectional ◽  
Female Patients

Abstract Background Individuals with major depressive disorder (MDD) have a high suicide risk. Some evidence suggests that uric acid (UA) may be involved in the pathophysiology of MDD. The purpose of this study was to evaluate whether serum UA levels were associated with suicide risk in MDD patients. Methods One hundred four female patients with MDD (52 patients with suicide risk and 52 patients without suicide risk) and 52 healthy individuals were included in this study. The suicide risk was evaluated by Mini International Neuropsychiatric Interview (M.I.N.I.). Fasting serum levels of UA, as well as glucose, lipid and renal function indicators were measured. Results Serum UA levels in MDD patients with suicide risk (245.01 ± 55.44 μmol/L) were significantly lower than those in MDD patients without suicide risk (274.17 ± 72.65 μmol/L) (p = 0.017) and healthy controls (271.42 ± 55.25 μmol/L) (p = 0.030). There was no difference in serum UA levels between the MDD patients without suicide risk and healthy controls (p = 0.821). Binary logistic regression analysis revealed a significant relationship between suicide risk and decreased serum UA levels (OR = 0.989, p = 0.010) in MDD patients. Conclusion Decreased serum UA levels were associated with suicide risk in MDD patients. Purinergic system dysfunction may be involved in the neurobiological basis of suicide risk in these patients.

scholarly journals Biochemical urinalysis of healthy kidney and stone-generating kidney in unilateral urolithiasis

2019 ◽  
Vol 8 (2) ◽  
pp. 151-156
Author(s):  
Feramarz Mohammadalibeigi ◽  
Majid Shirani ◽  
Hamed Seyed-Salehi ◽  
Lotfollah Afzali
Keyword(s):  
Uric Acid ◽  
Kidney Stone ◽  
Stone Formation ◽  
Urinary Stone ◽  
Metabolic Factors ◽  
Cross Sectional ◽  
Urinary Sample ◽  
The Mean ◽  
The Difference ◽  
Southwest Iran

Introduction: Oxalate, calcium, uric acid, and citrate are among the most widely known biochemical factors for urinary stone formation. In most cases, urolithiasis occurs as unilateral despite the role of systemic metabolic factors in kidney stone formation. Objectives: The present research aimed to compare these urinary biochemical factors in healthy and stone-generating kidneys in patients with unilateral urolithiasis. Patients and Methods: Forty patients with unilateral urolithiasis participated in this cross-sectional, descriptive-analytical study. The patients were hospitalized in kidney surgery and kidney urology ward of Kashani hospital of Shahrekord, southwest Iran. After the implementation of crushing stone using transurethral lithotripsy (TUL), 5-10 cc of urinary sample was collected from each kidney. An AutoAnalyzer (Mindray Company, Bs–360 model) and laboratory kits (Bionic Company) were used to measure calcium, uric acid, and creatinine. Moreover, a manual method and Darman Faraz Kave company kits were applied to measure the levels of oxalate and citrate. Results on the healthy and stone-generating kidneys of each patient were separately analyzed using the Stata 13 software. Results: The difference in the mean ratio of uric acid, oxalate, and citrate to creatinine in the healthy kidneys and stone-generating kidneys was not significant. However, the mean UCa/UCr ratio in the healthy kidneys was 0.27±0.07 and relatively greater than that in the stone-generating kidneys (0.11±0.04) (P=0.06). Conclusion: The studied topical factors and secretory disorders had not any significant relationship with unilateral urolithiasis. The cause of unilateral urolithiasis should be searched in other factors such as metabolic factors, main positions of individual during 24 hours and sleeping, and anatomic disorders of kidney stone, or multifactorial.

scholarly journals Association of serum uric acid levels with suicide risk in female patients with major depressive disorder: a comparative cross-sectional study

2020 ◽  
Author(s):  
Jing-Xu Chen ◽  
Jun-Hui Feng ◽  
Li-Gang Zhang ◽  
Yan Liu ◽  
Fu-De Yang ◽  
...  
Keyword(s):  
Major Depressive Disorder ◽  
Uric Acid ◽  
Depressive Disorder ◽  
Suicide Risk ◽  
Serum Levels ◽  
Binary Logistic Regression Analysis ◽  
Healthy Controls ◽  
Major Depressive ◽  
Cross Sectional ◽  
Female Patients

Abstract Background: Individuals with major depressive disorder (MDD) have a high suicide risk. Some evidence suggests that uric acid (UA) may be involved in the pathophysiology of MDD. The purpose of this study was to evaluate whether serum UA levels were associated with suicide risk in MDD patients.Methods: One hundred four female patients with MDD (52 patients with suicide risk and 52 patients without suicide risk) and 52 healthy individuals were included in this study. The suicide risk was evaluated by Mini International Neuropsychiatric Interview (M.I.N.I.). Fasting serum levels of UA, as well as glucose, lipid and renal function indicators were measured.Results: Serum UA levels in MDD patients with suicide risk (245.01 ± 55.44 μmol/L) were significantly lower than those in MDD patients without suicide risk (274.17 ± 72.65 μmol/L) (p = 0.017) and healthy controls (271.42 ± 55.25 μmol/L) (p = 0.030). There was no difference in serum UA levels between the MDD patients without suicide risk and healthy controls (p = 0.821). Binary logistic regression analysis revealed a significant relationship between suicide risk and decreased serum UA levels (OR = 0.989, p = 0.010) in MDD patients.Conclusion: Decreased serum UA levels were associated with suicide risk in MDD patients. Purinergic system dysfunction may be involved in the neurobiological basis of suicide risk in these patients.

scholarly journals Association of serum uric acid levels with suicide risk in female patients with major depressive disorder: a comparative cross-sectional study

2020 ◽  
Author(s):  
Jing-Xu Chen ◽  
Jun-Hui Feng ◽  
Li-Gang Zhang ◽  
Yan Liu ◽  
Fu-De Yang ◽  
...  
Keyword(s):  
Major Depressive Disorder ◽  
Uric Acid ◽  
Depressive Disorder ◽  
Suicide Risk ◽  
Serum Levels ◽  
Binary Logistic Regression Analysis ◽  
Healthy Controls ◽  
Major Depressive ◽  
Cross Sectional ◽  
Female Patients

Abstract Background: Individuals with major depressive disorder (MDD) have a high suicide risk. Some evidence suggests that uric acid (UA) may be involved in the pathophysiology of MDD. The purpose of this study was to evaluate whether serum UA levels were associated with suicide risk in MDD patients.Methods: One hundred four female patients with MDD (52 patients with suicide risk and 52 patients without suicide risk) and 52 healthy individuals were included in this study. The suicide risk was evaluated by Mini International Neuropsychiatric Interview (M.I.N.I.). Fasting serum levels of UA, as well as glucose, lipid and renal function indicators were measured.Results: Serum UA levels in MDD patients with suicide risk (245.01 ± 55.44 μmol/L) were significantly lower than those in MDD patients without suicide risk (274.17 ± 72.65 μmol/L) (p = 0.017) and healthy controls (271.42 ± 55.25 μmol/L) (p = 0.030). There was no difference in serum UA levels between the MDD patients without suicide risk and healthy controls (p = 0.821). Binary logistic regression analysis revealed a significant relationship between suicide risk and decreased serum UA levels (OR = 0.989, p = 0.010) in MDD patients.Conclusion: Decreased serum UA levels were associated with suicide risk in MDD patients. Purinergic system dysfunction may be involved in the neurobiological basis of suicide risk in these patients.

scholarly journals The reliability and success of peritoneal dialysis during the COVID-19 pandemic

2020 ◽  
Author(s):  
Hasan Haci Yeter ◽  
Ebru Gok Oguz ◽  
Omer Faruk Akcay ◽  
Refika Karaer ◽  
Emre Yasar ◽  
...  
Keyword(s):  
Peritoneal Dialysis ◽  
Parathyroid Hormone ◽  
Clinical Assessment ◽  
Mineral Metabolism ◽  
Severe Depression ◽  
Depression And Anxiety ◽  
Automated Peritoneal Dialysis ◽  
Laboratory Findings ◽  
Cross Sectional ◽  
Total Study Population

Abstract Aim: This study aimed to evaluate the symptoms, changes in laboratory findings during the COVID-19 pandemic, and the effect of depression on symptoms associated with end-stage kidney disease in patients with peritoneal dialysis (PD).Methods: This was an observational and cross-sectional study. The patients underwent three different PD modalities, including continuous ambulatory PD, automated peritoneal dialysis, and remote monitoring automated peritoneal dialysis (RM-APD). All patients were asked to complete the clinical assessment form and Beck depression and anxiety inventory. Additionally, the last two laboratory evaluations during this period were examined.Results: A total of 123 patients undergoing PD were included. None of the patients were diagnosed with COVID-19 infection. Serum ferritin, creatinine, phosphorus, albumin and parathyroid hormone levels were significantly elevated in the total study population (p=0.03, p=0.01, p=0.02, p=0.02 and p=0.05, respectively). While calcium, phosphorus, and parathyroid hormone tended to increase in patients with APD or CAPD, they remained stable in patients performing RM-APD. Most of the patients did not experience dyspnea, pitting edema, difficulty in blood pressure control, palpitation, bone muscle pain, or peritonitis. Moderate to severe depression was associated with dyspnea, weight gain, fatigue, palpitation, and increased anxiety.Conclusion: PD is a reliable and successful form of dialysis and can be safely administered even if hospital access is restricted. PD is a safe method of renal replacement therapy to protect patients from COVID-19 infection. Additionally, RM-APD may be a better choice because it provides more stable bone mineral metabolism. Moreover, evaluating depression and anxiety at phone visits may be necessary for accurate clinical assessment.

scholarly journals Simultaneous Recognition of Dopamine and Uric Acid in the Presence of Ascorbic Acid via an Intercalated MXene/PPy Nanocomposite

Sensors ◽  
2021 ◽  
Vol 21 (9) ◽  
pp. 3069
Author(s):  
Qiannan You ◽  
Zhongyang Guo ◽  
Rui Zhang ◽  
Zhimin Chang ◽  
Mingfeng Ge ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Uric Acid ◽  
Single Layer ◽  
Chemical Oxidation ◽  
High Concentration ◽  
Forming Process ◽  
Selective Determination ◽  
Preparation Strategy

Two-dimensional (2D) MXenes have shown a great potential for chemical sensing due to their electric properties. In this work, a Ti3C2Tx/polypyrrole (MXene/PPy) nanocomposite has been synthesized and immobilized into a glassy carbon electrode to enable the simultaneous recognition of dopamine (DA) and uric acid (UA) under the interference of ascorbic acid (AA). The multilayer Ti3C2Tx MXene was prepared via the aqueous acid etching method and delaminated to a single layer nanosheet, benefiting the in-situ growth of PPy nanowires. The controllable preparation strategy and the compounding of PPy material remain great challenges for further practical application. A facile chemical oxidation method was proposed to regulate magnitude and density during the forming process of PPy nanowire, which promotes the conductivity and the electrochemical active site of this as-prepared nanomaterial. The MXene/PPy nanocomposite-modified electrode exhibited the selective determination of DA and UA in the presence of a high concentration of AA, as well as a wide linear range (DA: 12.5–125 μM, UA: 50–500 μM) and a low detection limit (DA: 0.37 μM, UA: 0.15 μM). More importantly, the simultaneous sensing for the co-existence of DA and UA was successfully achieved via the as-prepared sensor.

scholarly journals Association of serum uric acid levels with suicide risk in female patients with major depressive disorder: a comparative cross-sectional study

2020 ◽  
Author(s):  
Jing-Xu Chen ◽  
Jun-Hui Feng ◽  
Li-Gang Zhang ◽  
Yan Liu ◽  
Fu-De Yang ◽  
...  
Keyword(s):  
Major Depressive Disorder ◽  
Uric Acid ◽  
Depressive Disorder ◽  
Suicide Risk ◽  
Serum Levels ◽  
Binary Logistic Regression Analysis ◽  
Healthy Controls ◽  
Major Depressive ◽  
Cross Sectional ◽  
Female Patients

Abstract Background: Individuals with major depressive disorder (MDD) have a high suicide risk. Some evidence suggests that uric acid (UA) may be involved in the pathophysiology of MDD. The purpose of this study was to evaluate whether serum UA levels were associated with suicide risk in MDD patients.Methods: One hundred four female patients with MDD (52 patients with suicide risk and 52 patients without suicide risk) and 52 healthy individuals were included in this study. The suicide risk was evaluated by Mini International Neuropsychiatric Interview (M.I.N.I.). Fasting serum levels of UA, as well as glucose, lipid and renal function indicators were measured.Results: Serum UA levels in MDD patients with suicide risk (245.01 ± 55.44 μmol/L) were significantly lower than those in MDD patients without suicide risk (274.17 ± 72.65 μmol/L) (p = 0.017) and healthy controls (271.42 ± 55.25 μmol/L) (p = 0.030). There was no difference in serum UA levels between the MDD patients without suicide risk and healthy controls (p = 0.821). Binary logistic regression analysis revealed a significant relationship between suicide risk and decreased serum UA levels (OR = 0.989, p = 0.010) in MDD patients.Conclusion: Decreased serum UA levels were associated with suicide risk in MDD patients. Purinergic system dysfunction may be involved in the neurobiological basis of suicide risk in these patients.

scholarly journals Correlation of serum uric acid with severity of airflow limitation in the patients of chronic obstructive pulmonary disease

2020 ◽  
Vol 7 (4) ◽  
pp. 634
Author(s):  
Sujit Kumar ◽  
Vimal Kumar Nishad ◽  
Amitabh Das Shukla ◽  
Santosh Kumar Chaudhary
Keyword(s):  
Uric Acid ◽  
Serum Uric Acid ◽  
Cross Sectional Study ◽  
Airflow Limitation ◽  
Chronic Obstructive ◽  
Healthy Controls ◽  
Cross Sectional ◽  
Obstructive Pulmonary Disease ◽  
Copd Patients ◽  
Exacerbation Risk

Background: Serum uric acid (sUA) levels were previously found to be correlated with hypoxic states. We aimed to determine the levels of sUA in COPD patients and to evaluate whether sUA level can be used as predictors of exacerbation risk and disease severity.Methods: This cross-sectional study included COPD patients and healthy controls. The sUA levels in each group were evaluated and their correlations with the study parameters were investigated. ROC analyses for exacerbation risk were reported.Results: The study included 106 COPD patients and 110 healthy controls. The mean sUA levels were significantly higher in patients with COPD compared to healthy controls (p<0.05). Mean sUA levels were compared with different stages of COPD according to GOLD criteria. Stage 4 COPD subjects had highest sUA levels compared to other stages. Statistically significant trend was observed for GOLD staging of disease (p<0.05). Surprisingly non-smokers were having higher uric acid level than smokers (p<0.05). The ROC analyses indicated that sUA levels can be useful in predicting exacerbation risk (AUC, 0.412) especially at higher cut-off values, but with low specificity.Conclusions: Study suggested that sUA levels increased in patients with COPD compared to healthy controls. At higher cut-off values sUA levels might be useful in predicting COPD exacerbation risk and disease severity. However, more prospective cohort studies with large number of participants are needed to further analyse the possible different prognostic roles of hyperuricemia.

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