Human papillomavirus DNA testing with the urine sample is not yet available: the accuracy of two distinct kits

SUMMARY OBJECTIVE: The aim of this study was to assess the results and efficiency of two real-time polymerase chain reaction procedures for detecting human papillomavirus utilizing urine samples. METHODS: This study comprised 151 patients who had previously tested positive for human papillomavirus in their cervical samples. Two different commercial real-time polymerase chain reaction techniques were used for identification and genotyping human papillomavirus in urine specimens. The urine samples of 151 patients were evaluated via the Roche Cobas test, and the urine samples of 91 patients were also evaluated via the Qiagen test. RESULTS: The overall consistency of urine and cervical swab specimens for the identification of human papillomavirus in Roche Cobas and Qiagen tests were 44.8 and 44%, respectively. The rates of positive human papillomavirus results from urine samples were 57 and 70.3%, respectively. The overall concordance among Roche Cobas and Qiagen tests utilizing urine samples for human papillomavirus type 16/18 was 84.3% with a kappa value of 0.675, and for other high-risk-human papillomavirus, it was 75.60% with a kappa value of 0.535. Roche Cobas showed high concordance with Qiagen test. CONCLUSION: human papillomavirus positivity was not detected in all urine samples. It is still inappropriate to recommend the use of urine liquid biopsy for the accurate and reliable detection of human papillomavirus. Due to the lack of a standardized tool, the utilization of urine samples as a screening human papillomavirus test remains a challenge.

Prevalence and antimicrobial resistance profile of pathogens isolated from patients with urine tract infections admitted to a university hospital in a medium-sized Brazilian city

ABSTRACT This study aimed to determine the antibiotic profile of microorganisms isolated from urine samples of patients with community urine tract infections (UTI) admitted to the University Hospital of the Federal University of Sao Carlos to support an appropriate local empirical treatment. A retrospective cross-sectional study was conducted from October 2018 to October 2020. Data from 1,528 positive urine cultures for bacterial pathogens and antibiograms were tabulated. Bacterial species prevalence and their resistance profile were analyzed and compared by sex and age. For Gram-negative fermenting bacteria, resistance rates were compared between patients with previous hospitalization and the total of infections caused by this group. For comparisons, the Chi-square test was performed, using Fisher's exact test when necessary (BioEstat program, adopting p ≤ 0.05). A multivariate analysis was applied to assess the effect of the studied variables in predicting multidrug resistance. Infections were more prevalent in women and older adults. Gram-negative bacteria represented 90.44% of total cultures. In both sexes, E. coli prevalence was significantly higher in adults compared with older adults (p < 0.0001). For several antibiotics, resistance rates were higher in the older adults compared with other ages and in patients with Gram-negative fermenting infections and previous hospitalization compared with the total of infections by this group of bacteria. The closer to the hospitalization, the higher the number of antibiotics with superior resistance rates. Resistance rates for aminoglycosides, carbapenems, ceftazidime, nitrofurantoin, piperacillin+tazobactam, and fosfomycin were less than 20%, considered adequate for empirical treatment. Only hospitalization in the previous 90 days was statistically significant in predicting infections by multidrug-resistant bacteria.

Toxicity Attenuation Mechanism on Processing Method for Aconiti Lateralis Radix Praeparata in Guilingji Based on Urine Metabolomics / 中国实验方剂学杂志

ObjectiveMetabolomics was used to reveal the mechanism of Aconiti Lateralis Radix Praeparata（ALRP） in attenuating toxicity by processing from the aspects of amino acid metabolism， oxidative stress and energy metabolism by analyzing multiple metabolic pathways. MethodTwenty-four rats were randomly divided into control group， raw group and processed group， 8 rats in each group. The raw and processed group were given with 0.64 g·kg-1 of raw ALRP and processed ALRP respectively every day， the control group was given with an equal amount of normal saline once a day. After continuous administration for 7 days， the urine， serum and heart tissue of rats were collected. Pathological examination of the heart was carried out using hematoxylin-eosin（HE） staining， and the activities of lactate dehydrogenase（LDH） and creatine kinase-MB（CK-MB） in serum and cardiac tissues were detected by microplate assay and immunoinhibition assay. The effects of ALRP on rat heart before and after processing were compared and analyzed. Ultra performance liquid chromatography-quadrupole-time-of-flight mass spectrometry（UPLC-Q-TOF-MS） was used to perform urine metabolomics analysis， and multivariate statistical analysis was used to screen for differential metabolites related to ALRP in attenuating toxicity by processing， and pathway enrichment analysis was carried out to explore the processing mechanism. ResultHE staining showed that no obvious pathological changes were observed in the heart tissue of the control group， while obvious infiltration of inflammatory cells such as plasma cells and granulocytes was observed in the heart tissue of the raw group， indicating that the raw ALRP had strong cardiotoxicity. There was no significant difference in HE staining of heart tissue between the processed group and the control group， indicating that the toxicity of ALRP was significantly reduced after processing. Compared with the control group， the activities of LDH and CK-MB were significantly increased in serum and heart tissue of the raw group， and those were significantly decreased in serum and heart tissue of the processed group， suggesting that the myocardial toxicity of processed ALRP was reduced. A total of 108 endogenous differential metabolites associated with the raw ALRP were screened using multivariate statistical analysis in positive and negative modes， of which 51 differential metabolites were back-regulated by the processed ALRP. Biological analysis of the key regulatory pathways and associated network changes showed that the pathways related to toxicity of ALRP mainly included tryptophan metabolism， arginine and proline metabolism， phenylalanine metabolism， aminoacyl-tRNA biosynthesis， alanine， aspartate and glutamate metabolism， etc. The metabolic pathways related to the attenuation of processed ALRP mainly included aminoacyl-tRNA biosynthesis， tryptophan metabolism， phenylalanine， tyrosine and tryptophan biosynthesis， phenylalanine metabolism and caffeine metabolism. ConclusionThe processing technology of ALRP in Guilingji can significantly attenuate the cardiotoxicity of raw products， the mechanism mainly involves amino acid metabolism， oxidative stress and energy metabolism， which can provide experimental bases for the research related to the mechanism of toxicity reduction of ALRP by processing and its clinical safety applications.

Utilidad del citoquímico urinario en cuidados intensivos, una herramienta olvidada / The usefulness of urinary sediment in intensive care, a forgotten tool

El sedimento urinario es una herramienta utilizada hace tantos años para caracterizar manifestaciones renales de enfermedades primarias y secundarias, que es necesario realizar una estandarización y aprender a interpretar el mismo. En los pacientes ingresados a la unidad de cuidados intensivos, muchas veces no se realiza, o hay que tener en cuenta varios factores para su interpretación debido al estado hemodinámico del paciente a la filtración glomerular, la excreción tubular, la reabsorción de agua y los solutos además del equilibrio acido-base, los cuales pueden variar significativamente en pacientes en estado crítico con diferentes condiciones fisiopatológicas. Se presenta una revisión de las condiciones para la interpretación del urianálisis.

A urinary sediment is a tool used for years to characterize renal manifestations of primary and secondary diseases, which requires standardization and learning to interpret it. In patients admitted to the intensive care unit, it is often not performed, or several factors must be taken into account for its interpretation due to the patient's hemodynamic status, glomerular filtration, tubular excretion, water reabsorption, and solutes. In addition to the acid-base balance, which can vary significantly in critically ill patients with different pathophysiological conditions? A review of the conditions for the interpretation of urinalysis is presented.

Utilidad del citoquímico urinario en cuidados intensivos, una herramienta olvidada

El sedimento urinario es una herramienta utilizada hace tantos años para caracterizar manifestaciones renales de enfermedades primarias y secundarias, que es necesario realizar una estandarización y aprender a interpretar el mismo. En los pacientes ingresados a la unidad de cuidados intensivos, muchas veces no se realiza, o hay que tener en cuenta varios factores para su interpretación debido al estado hemodinámico del paciente a la filtración glomerular, la excreción tubular, la reabsorción de agua y los solutos además del equilibrio acido-base, los cuales pueden variar significativamente en pacientes en estado crítico con diferentes condiciones fisiopatológicas. Se presenta una revisión de las condiciones para la interpretación del urianálisis.

A urinary sediment is a tool used for years to characterize renal manifestations of primary and secondary diseases, which requires standardization and learning to interpret it. In patients admitted to the intensive care unit, it is often not performed, or several factors must be taken into account for its interpretation due to the patient's hemodynamic status, glomerular filtration, tubular excretion, water reabsorption, and solutes. In addition to the acid-base balance, which can vary significantly in critically ill patients with different pathophysiological conditions? A review of the conditions for the interpretation of urinalysis is presented.

Albumin-to-protein ratio in spot urine samples for analysis of proteinuria selectivity in chronic kidney disease / Razão albumina/proteína em amostras isoladas de urina para análise da seletividade de proteinúria na doença renal crônica

ABSTRACT Introduction: The albumin-to-creatinine ratio and total protein-to-creatinine ratio in spot urine samples have already been validated as surrogates for 24-hour albuminuria and proteinuria measurements. Thus, we hypothesized that the type of proteinuria, detected by the electrophoretic pattern of 24-hour urine, could be predicted by the simple proportion of albumin in the total urine protein content, using the albumin-to-protein ratio (APR). Our study sought to validate the use of APR as a cheaper substitute for urinary protein electrophoresis (UPE). Methods: Using different mathematical models, we compared, the albumin fraction in 24-hour urine samples by electrophoresis and the APR ratio in spot samples from 42 outpatients with chronic kidney disease (CKD). Results: A strong log-order correlation r = 0.84 (0.75-0.92; 95% CI, p = 0.001) was observed between APR and the albumin fraction in the UPE. Conclusion: The APR can substitute electrophoresis in CKD outpatients.

Resumo Introdução: A utilização da razão albumina/creatinina e da razão proteína total/creatinina em amostras isoladas de urina já foram validadas como substitutos para a albuminúria e proteinúria em 24 horas. Assim, nossa hipótese é que o tipo de proteinúria, dado pelo padrão eletroforético da urina de 24 horas, poderia ser previsto pela simples proporção de albumina no conteúdo total de proteínas na urina, utilizando a razão albumina/proteína (RAP). O presente estudo procurou validar o uso da RAP como um substituto mais prático e de menor custo da eletroforese de proteínas urinárias (EPU). Métodos: Foram utilizados diferentes modelos matemáticos a fim de comparar a fração de albumina pela eletroforese em amostras de urina de 24 horas e a RAP em amostras isoladas em 42 pacientes ambulatoriais com doença renal crônica. Resultados: Foi observada uma forte correlação logarítmica r = 0,84 (0,75-0,92; 95% CI, p = 0,001) entre a RAP e a fração de albumina pela EPU. Conclusão: A RAP pode substituir a eletroforese urinária em pacientes renais crônicos ambulatoriais.

Assessment of serum magnesium and correlation with glycemic control and complication in type 2 diabetes mellitus – A cross-sectional study in a tertiary care hospital in eastern zone of India

Background: Diabetes mellitus (DM) is an expanding global health problem. Type 2 DM (T2DM) patients account about 90% of total DM patients. Magnesium is important for different physiological mechanism. Hypomagnesemia is common in T2DM patient. Magnitude of hypomagnesemia is related with glycemic control and is associated with complications of T2DM. Aims and Objectives: Our aim of the study was to assess the prevalence of hypomagnesemia in patients of T2DM patients and to find their correlation with glycemic control and complications of T2DM patients in rural population of eastern zone of India. Materials and Methods: The hospital-based cross-sectional study includes 99 male and female DM patients between 15 and 60 years age. Fasting blood sugar, postprandial blood sugar, HbA1c, serum total magnesium, and urine albumin creatinine ratio were measured. Data were entered into Microsoft Excel spreadsheet and then analyzed by SPSS (version 25.0; SPSS Inc.) and GraphPad Prism (version 5.0). P < 0.05 was considered statistically significant. Results: From our study, we observed that hypomagnesemia is common in T2DM patients. The magnitude of hypomagnesemia is correlated with glycemic control (P < 0.0001). Moreover, hypomagnesemia is associated with diabetic kidney diseases (P < 0.05). Conclusion: It can be concluded that serum magnesium should be monitored in all T2DM patients and should be managed appropriately because hypomagnesemia may induce complications in T2DM patients.

Self-Measured Blood Pressure and Target Organ Damage in Newly Detected Hypertension in South Gujarat, India

Introduction: Blood pressure transient spikes have been considered to be noise and only a hindrance to a proper assessment of typical blood pressure, which is defined as the actual underlying average blood pres-sure over a long period of time. The current study aimed to see if the highest Self measured Systolic blood Pressure could be utilized to forecast the occurrence of Target organ damage and evaluate the independent association between the maximum Self measured Systolic blood Pressure and Target organ damage in indi-viduals with untreated hypertension. Method: We evaluated the urine albumin/creatinine ratio (UACR) and carotid intima-media thickness (IMT) using ultrasonography in 462 hypertensive individuals who had never taken treatment for their hypertension. Residential blood pressure was recorded. Result: The maximal Self measured Systolic blood Pressure had considerably higher association coefficients with left ventricular mass index (LVMI) and carotid intima-media thickness than the mean Self measured Sys-tolic blood Pressure. Irrespective of the mean Self measured Blood pressure level, multivariate regression studies showed that the maximal Self measured Systolic blood Pressure was independently related with left ventricular mass index and carotid intima-media thickness. Conclusion: Transiently high blood pressure measurements recorded at Self measured shouldn't be dis-missed as noise but rather taken seriously as significant warning signs of hypertensive Target organ damage in the heart and arteries.

The levels of urine interleukin-8 in elderly patients with non-small cell lung cancer and its relationship with prognosis / 中国医师进修杂志

Objective:To investigate the prognostic value of urinary interleukin(IL)-8 in elderly patients with non-small cell lung cancer (NSCLC).Methods:The clinical data of 110 elderly patients with NSCLC treated in Beijing Hepingli Hospital from January 2018 to January 2019 were collected, and the relationship between urinary IL-8 and clinicopathological characteristics were analyzed. The best cut-off value was determined by receiver operating characteristic (ROC) curve. The factors affecting the survival and prognosis of elderly patients with NSCLC were determined by univariable and multivariable Cox proportional hazards regression models.Results:The best cut-off value of urine interleukin-8 for predicting prognostic of elderly patients with NSCLC was 26.08 ng/L, the specificity was 80.00%, the sensitivity was 84.60%. The level of urine IL-8 was related to neutrophil cell count, clinical stage and serum IL-8 level ( P<0.05). The results of Cox multivariate analysis showed that the age ( HR = 4.810, P = 0.000), serum soluble fragment of cytokeratin 19(CYFRA211) ( HR = 2.728, P = 0.017), clinical stage ( HR = 2.090, P = 0.014), urine IL-8 ( HR = 4.451, P = 0.000) were independent risk factors for survival of elderly patients with NSCLC. Conclusions:Urine IL-8 is an independent prognostic risk factor of survival of elderly patients with NSCLC, it can be used as one of the indicators to evaluate the survival prognosis of patients.

The application of bladder stimulation technique in clean-catch urine collection of late newborns / 中国新生儿科杂志

Objective:To study the clinical value of bladder stimulation technique (BST) for clean-catch urine collection in late newborns.Methods:From November 2020 to March 2022, relatively stable late newborns hospitalized in the Department of Neonatology of our hospital were enrolled in the prospective randomized controlled trial. The newborns were assigned into BST group and control group. In BST group, urine was collected using BST (suprapubic tapping alternating with lumbosacral massage for 5 min) 20~30 min after feeding and specimen were collected using urine bag before and after BST. In the control group, urine was collected using urine bag method. The urine collection was considered successful if >1 ml of urine not contaminated by faeces were collected within 60 min. The t-test and χ 2 test were used for data analysis. Results:A total of 231 late newborns were included with 117 cases in BST group and 114 in control group. The rate of successful urine collection in BST group was higher than control group (65.8% vs. 39.4%).The time needed for successful urine collection [(30.2±8.5) min vs. (40.7±12.9) min], the incidences of faeces contamination (2.5% vs. 21.1%) and urine contamination (11.7% vs. 26.7%) in BST group were all significantly lower than control group(all P<0.05). Male and female newborns in BST group had similar success rates of urine collection (65.6% vs. 66.0%). Male newborns in BST group had similar urine contamination rate with control group (9.5% vs. 11.5%) and female newborns in BST group had significantly lower urine contamination rate than control group (14.3% vs. 47.4%, P<0.05). Urine was successfully collected in 71 newborns in BST group with median duration of BST for 81 (61,132) s. No adverse effects were observed except for transient consolable crying. Conclusions:Compared with urine bag collection method, BST improves successful urine collection rates and reduces the time needed for urine collection and urine contamination rates (especially for females).

One case report of patient with repeated kidney stone and urine crystal was cured after strengthening calcium supplementation / 中华内分泌外科杂志

The lifetime prevalence of nephrolithiasis is 15% for men, with a 5-year recurrence rate of 35% to 50% after an initial event. Although it was initially recommended to limit calcium intake in these patients, a number of studies have reported association between lower total dietary calcium intake and increased risk of incident kidney stones, and that increased calcium intake might reduce the risk of incident kidney stones. We report a 35-year-old male who presented recurrent 8-years of nephrolithiasis and urine crystal with calcium intake restriction, and had no recurrence after 5 years of follow-up after intensive calcium and vitamin D supplementation.

Analysis of urine Alzheimer-associated neuronal thread protein level and related factors of middle-aged and elderly people in Mianyang / 四川精神卫生

ObjectiveTo investigate the Alzheimer-associated neurofilament protein （AD7c-NTP） in urine of middle-aged and elderly people and its correlation between common metabolites. MethodsA total of 1 150 middle-aged and elderly people who did their physical exmanination in the health examination center of the Sichuan Science City Hospital and the Third Hopital of Mianyang were recruited from March 2017 to March 2020. The level of urine AD7c-NTP were measured by enzyme-linked immunosorbent assay （ELISA）， and common metabolites in blood were measured by biochemical analyzer. Based on urine AD7c-NTP level ≤1.5 ng/mL， the objects was divided into normal group （n=956） and elevated group （n=194）. Thier demographic data and blood biochemical indicators were collected. ResultsThe urine AD7c-NTP level in middle-aged and elderly people was 0.60（0.30~1.20） ng/mL. The urine AD7c-NTP level was higher in women than that in men ［1.04（0.40~1.30） ng/mL vs. 0.84（0.30~1.00） ng/mL， Z=4.202， P˂0.01］. And the urine AD7c-NTP level was lower in the normal group than that in the elevated group ［0.50（0.30~0.90） ng/mL vs. 2.10（1.70~2.10） ng/mL， Z=22.035， P˂0.01］. The results of the univariate comparison showed that， the differences between the two groups in age （Z=6.545）， fasting glucose （Z=3.506）， blood uric acid （Z=2.574）， urea nitrogen （Z=2.891）， creatinine （Z=2.243）， total bilirubin （Z=3.936）， glutathione （Z=0.969）， total cholesterol （t=3.956） and low density lipoprotein （Z=-5.678） were were statistically significant （P˂0.05 or 0.01）. Spearman correlation analysis showed that， the urine AD7c-NTP level was positively correlated with age and the levels of urea nitrogen， glucose， total cholesterol and low density lipoprotein （r=0.177， 0.178， 0.171， 0.109， 0.149， P˂0.01）， and negatively correlated with the level of total bilirubin （r=-0.172， P˂0.01）. Conclusionthe urine AD7c-NTP level in middle-aged and elderly females was signifitcantly higher than in middle-aged and elderly males.The urine AD7c-NTP level of middle-aged and elderly people was positively correlated with age， urea nitrogen， glucose， total cholesterol and low density lipoprotein， and negatively correlated with total bilirubin.

Determination of methylmercury in urine by direct mercury analyzer / 中华劳动卫生职业病杂志

Objective: To develop asolvent extraction-direct mercury analyzer method for determination of methylmercury in urine. Methods: After the urinehydrolyzesd by hydrobromic acid, methylmercury was extracted by tolueneand reverse-extracted from L-cysteine solution, it was then detectedbydirect mercuryanalyzer. Results: The linear range was 0.2-50.0 μg/L, and the related coefficient was 0.9999. The relative standard deviations (RSD) within the group were 5.04%-6.64%, and the RSD between the group were 5.65%-8.11 %. The average recovery efficiencies were 85.4%-95.5%. The detection limitation was 0.0482 μg/L and the quantification concentrations was 0.1607 μg/L. Conclusion: The method, which has low detection limit, high sensitivity, easy to operate, is stability for the determination of methylmercury in urine.

Determination of cobalt and tungsten in human urine by inductively coupled plasma mass spectrometry / 中华劳动卫生职业病杂志

Objective: To establish a inductively coupled plasma mass spectrometry method for the determination of trace cobalt and tungsten in human urine. Methods: The authors used 1% nitric acid solution as diluent in October-December 2021, the sample dilution factor and internal standard element were optimized by single factor rotation experiment, and the difference between the working curve and the standard curve was compared. Results: The method uses working curve to determine cobalt and tungsten in urine, the linear range of this method was 0.0~10.0 μg/L, the correlation coefficient was 0.999 9, the detection limits respectively were 0.005 μg/L (cobalt) and 0.09 μg/L (tungsten), the recoveries of samples respectively were 87.0%~100.2% (cobalt) and 89.4%~104.8% (tungsten), the relative standard deviations respectively were 0.4%~4.4% (cobalt) and 0.6%~3.8% (tungsten) . Conclusion: A simple and rapid method for determination of cobalt and tungsten in urine has been established. This method has the advantages of simple operation, high sensitivity, low detection limit and good stability. It is suitable for determination of cobalt and tungsten in urine of all kinds of people.

Establishment and evaluation of a method for extracting exogenous short DNA fragments of Schistosoma japonicum from urine samples / 中国血吸虫病防治杂志

Objective To establish the method for extracting exogenous short DNA fragments of Schistosoma japonicum from urine samples, and to evaluate the efficiency of this method for extraction from urine samples treated with various methods. Methods The S. japonicum SjG28 gene fragment was selected as a target sequence, and the 81 bp short DNA fragment was amplified on the target sequence using PCR assay. Following characterization using sequencing, the short DNA fragment was added into the urine samples as an exogenous short DNA fragment. Primers and probes were designed with SjG28 as a target gene, to establish the real-time fluorescent quantitative PCR (qPCR) assay. The sensitivity of this qPCR assay was evaluated with exogenous short DNA fragments that were diluted at a 1:10 dilution ratio as the DNA template, and the specificity of the qPCR assay was evaluated with the genomic DNA of S. mansoni, S. haematobium, Babesia, Ancyiostoma duodenaie, Cionorchis sinensis, and Paragonimus westermani as DNA templates. Exogenous short DNA fragments were added into artificial and healthy volunteers’ urine samples, followed by pH adjustment, centrifugation and concentration, and the efficiency of extracting exogenous short DNA fragments from urine samples was compared with the QIAmp Viral RNA Mini Kit (Qiagen kit) and BIOG cfDNA easy kit (BIOG kit). Results An 81 bp small DNA fragment of S. japonicum was successfully prepared, and the lowest detection limit of the established qPCR assay was 100 copies/μL of the 81 bp small DNA fragment of S. japonicum. If the genomic DNA of S. japonicum, S. mansoni, S. haematobium, Babesia, A. duodenaie, C. sinensis, and P. westermani served as DNA templates, the qPCR assay only detected fluorescent signals with S. japonicum genomic DNA as the DNA template. If the pH values of artificial urine samples were adjusted to 5, 6, 7 and 8, the recovery rates were (49.12 ± 2.09)%, (84.52 ± 4.96)%, (89.38 ± 3.32)% and (87.82 ± 3.90)% for extracting the exogenous short DNA fragment of S. japonicum with the Qiagen kit, and were (2.30 ± 0.07)%, (8.11% ± 0.26)%, (13.35 ± 0.61)% and (20.82 ± 0.68)% with the BIOG kit, respectively (t = 38.702, 26.955, 39.042 and 29.571; all P values < 0.01). If the Qiagen kit was used for extracting the exogenous short DNA fragment from artificial urine samples, the lowest recovery rate was seen from urine samples with a pH value of 5 (all P values < 0.05), and there were no significant differences in the recovery rate from urine samples with pH values of 6, 7 and 8 (all P values > 0.05). Following centrifugation of artificial [(64.30 ± 1.00)% vs. (58.87 ± 0.26)%; t = 12.033, P < 0.05] and healthy volunteers’ urine samples [(31 165 ± 1 017) copies/μL vs. (28 471 ± 818) copies/μL; t = 23.164, P < 0.05]. In addition, concentration of artificial urine samples with the 10 kDa Centrifugal Filter and concentration of healthy volunteers’ urine samples with the 100 kDa Centrifugal Filter were both effective to increase the recovery of the Qiagen kit for extracting the exogenous short DNA fragment of S. japonicum (both P values < 0.01). Conclusions A method for extracting exogenous short DNA fragments of S. japonicum from urine samples has been successfully established, and the Qiagen kit has a high extraction efficiency. Adjustment of urine pH to 6 to 8 and concentration of healthy volunteers’ urine samples with the 100 kDa Centrifugal Filter are both effective to increase the efficiency of extracting exogenous short DNA fragments of S. japonicum.

Rapid determination of four herbicides in urine with ultra-high performance liquid chromatography-triple quadrupole tandem mass spectrometry / 预防医学

Objective@#To establish a ultra-high performance liquid chromatography-tandem triple quadrupole mass spectrometry method for rapid simultaneous determination of quinclorac, acetochlor, butachlor and metolachlor in urine.@*Methods@#Urine samples were diluted 10 times, prepared into the mixed standard solution, and subjected to gradient elution on the ACQUITY UPLC BEH C18 column (100 mm×2.1 mm, 1.7 μm) with 0.1% formic acid and acetonitrile as the mobile phase. The quinclorac, acetochlor, metolachlor and butachlor levels were determined using electrospray ionization-positive ultra-high performance liquid chromatography-tandem triple quadrupole mass spectrometry with the multiple reaction monitoring mode.@*Results@#Four herbicides were effectively separated on the ACQUITY UPLC BEH C18 column (100 mm× 2.1 mm, 1.7 μm), and good linear relationships were observed for quinclorac, acetochlor and butachlor at 1 to 25 μg/L and for metolachlor at 0.2 to 25 μg/L, with all linear correlation coefficients of >0.999. The detection limts of quinclorac, acetochlor, butachlor and metolachlor were 0.10, 0.10, 0.20 and 0.01 μg/L, respectively. The recovery rates of quinclorac, acetochlor and butachlor were 107.42%, 93.94% and 90.27% from urine samples at a spiked level of 5 µg/L, with relative standard deviations of 4.82%, 3.84% and 6.76%, and the recovery rate of metolachlor was 89.51% at a spiked level of 0.5 µg/L, with a relative standard deviation of 8.98%.@*Conclusion@#The chromatography and mass spectrometry conditions are optimized in this ultra-high performance liquid chromatography-tandem mass spectrometry, which is effective for rapid simultaneous determination of quinclorac, acetochlor, metolachlor and butachlor in urine samples.

Research Progress on Biological Matrix Reference Materials in Forensic Toxicology / 法医学杂志

Biological matrix reference material is a reference material that combines the target material with the biological matrix. The biological matrix reference material has higher consistency with the authentic specimens in forensic toxicology, and its application has a positive effect on improving the accuracy of test results. This paper reviews the research on the matrix reference materials corresponding to three common biological test materials (blood, urine and hair). In order to provide reference for the development and application of biological matrix reference materials in forensic toxicology, this paper mainly introduces the research progress of preparation technology of biological matrix reference materials and some existing products and their parameters evaluation.

Correlation between urine vitamin D -binding protein and early -stage renal damage in Type 2 diabetes / 中南大学学报(医学版)

OBJECTIVES@#The excretion of urinary vitamin D-binding protein (uVDBP) is related to the occurrence and development of early-stage renal damage in patients with Type 2 diabetes (T2DM). This study aims to explore the significance of detecting uVDBP in T2DM patients and its relationship with renal tubules, and to provide a new direction for the early diagnosis of T2DM renal damage.@*METHODS@#A total of 105 patients with T2DM, who met the inclusion criteria, were included as a patient group, and recruited 30 individuals as a normal control group. The general information and blood and urine biochemical indicators of all subjects were collected; the levels of uVDBP, and a marker of tubular injury [urine kidney injury molecule 1 (uKIM-1), urine neutrophil gelatinase-associated lipocalin (uNGAL) and urine retinol-binding protein (uRBP)] were detected by enzyme-linked immunosorbent assay. The results were corrected by urinary creatinine (Cr) to uVDBP/Cr, uKIM-1/Cr, uNGAL/Cr and uRBP/Cr. The Pearson's and Spearman's correlation tests were used to analyze the correlation between uVDBP/Cr and urine albumin-to-creatinine ratio (UACR), estimated glomerular filtration rate (eGFR) and markers of tubular injury, and multivariate linear regression and receiver operating characteristic curve were used to analyze the correlation between uVDBP/Cr and UACR or eGFR.@*RESULTS@#Compared with the normal control group, the uVDBP/Cr level in the patient group was increased (P<0.05), and which was positively correlated with UACR (r=0.774, P<0.01), and negatively correlated with eGFR (r=-0.397, P<0.01). There were differences in the levels of uKIM-1/Cr, uNGAL/Cr, and uRBP/Cr between the 2 groups (all P<0.01). The uVDBP/Cr was positively correlated with uKIM-1/Cr (r=0.752, P<0.01), uNGAL/Cr (r=0.644, P<0.01) and uRBP/Cr (r=0.812, P<0.01). The sensitivity was 90.0% and the specificity was 82.9% (UACR>30 mg/g) for evaluation of uVDBP/Cr on T2DM patients with early-stage renal damage, while the sensitivity was 75.0% and the specificity was 72.6% for evaluation of eGFR on T2DM patients with early-stage renal damage.@*CONCLUSIONS@#The uVDBP/Cr can be used as a biomarker in early-stage renal damage in T2DM patients.

Age-related changes for the predictors of benign prostatic hyperplasia in Chinese men aged 40 years or older / 亚洲男科学杂志(英文版)

A cross-sectional study was conducted to estimate the age-stratified normal levels and age-related changes in the risk predictors of benign prostatic hyperplasia (BPH) progression. A total of 4706 male participants aged 40 years or older in Zhengzhou (China) were enrolled. The values of the International Prostate Symptom Score (IPSS), prostate-specific antigen (PSA), prostate volume (PV), and postvoid residual urine volume (PVR) significantly increased with age. Nonlinear relationships between age and IPSS scores ≥8 (P for nonlinearity = 0.046), PSA level ≥1.6 ng ml-1, PV ≥31 ml, or PVR ≥39 ml (all P for nonlinearity <0.001) were observed. After the age of 61 years, the risk indicators related to BPH progression were positively correlated with age (odds ratio [OR] >1), regardless of the predictors of the IPSS score, PSA level, PV, or PVR; and the OR values increased gradually. Therefore, after the age of 61 years, the risk predictors related to BPH progression were positively correlated with age.

Analysis on health status and influencing factors of 1353 mercury workers in Xinjiang / 中华劳动卫生职业病杂志

Objective: To investigate the health status of workers exposed to occupational mercury, and to provide the theoretical basis for formulating reasonable health monitoring and targeted protection measures. Methods: In November 2021, 1353 mercury-exposed workers who underwent occupational health examination in a hospital in Xinjiang Uygur Autonomous Region from 2018 to 2021 were collected as research subjects. By analyzing their blood pressure, electrocardiogram, blood routine, liver function and urine β2-microglobulin and urinary mercury in different gender, age, length of service, industry and enterprise scale, and the health status. And the influencing factors of urinary mercury were evaluated. Results: Among 1353 workers exposed to mercury, there were 1002 males (74.1%), the average age was (37.2±9.8) years old, and the length of service was 3.1 (2.0, 8.0) years. The abnormal rates of physical examination, blood pressure, electrocardiogram, blood routine, liver function, urinary β2-microglobulin and urinary mercury were 73.9% (1000/1353), 12.3% (166/1353), 30.2% (408/1353), 59.9% (810/1353), 32.5% (440/1353), 15.2% (205/1353) and 2.2% (30/1353), respectively. The abnormal rates of blood pressure, blood routine, liver function, urinary β2-microglobulin and urinary mercury in male workers were higher than those in female workers (P<0.05). The abnormal rates of workers' blood pressure and physical examination results increased with the increase of age and length of service, while the abnormal rate of electrocardiogram results were opposite (P<0.05). There were statistically significant differences in the abnormal rates of blood pressure, blood routine, urinary β2-microglobulin and physical examination results among workers of different enterprises and different industries (P<0.05). Multivariate logistic regression analysis showed that the workers with age ≥30 years old, microminiature enterprises, abnormal physical examination results and urinary β2-microglobulin were the susceptible population with abnormal urinary mercury (P<0.05) . Conclusion: The occupational health status of mercury workers in Xinjiang Uygur Autonomous Region is not optimistic, and the health monitoring of microminiature enterprises and older workers should be improved to effectively protect the physical and mental health of workers.