SuperTAD-Fast: Accelerating Topologically Associating Domains Detection Through Discretization.

High-throughput chromosome conformation capture (Hi-C) technology captures spatial interactions of DNA sequences into matrices, and software tools are developed to identify topologically associating domains (TADs) from the Hi-C matrices. With structural information theory, SuperTAD adopted a dynamic programming approach to find the TAD hierarchy with minimal structural entropy. However, the algorithm suffers from high time complexity. To accelerate this algorithm, we design and implement an approximation algorithm with a theoretical performance guarantee. We implemented a package, SuperTAD-Fast. Using Hi-C matrices and simulated data, we demonstrated that SuperTAD-Fast achieved great runtime improvement compared with SuperTAD. SuperTAD-Fast shows high consistency and significant enrichment of structural proteins from Hi-C data of human cell lines in comparison with the existing six hierarchical TADs detecting methods.

Global trend of nondrug and nonsedativehypnotic treatment forinsomnia: a bibliometric study.

OBJECTIVE: To present a bibliometric analysis of global scientific publications on the nondrug and nonsedative hypnotic treatment of insomnia with regard to influential institutions, publications, countries, research hotspots, trends, and frontiers. METHODS: A literature review was conducted by searching the Web of Science Core Collection (WoSCC) and China National Knowledge Infrastructure (CNKI) databases to identify all publications related to the nondrug and nonsedative hypnotic treatment of insomnia from 2000 to 2021. Eligible publications were reviewed, including annual publication increments, citation analyses, international collaborations, and keyword analyses. The data were analysed using CiteSpace (vers5.8.R3, 6.1.R2 and 6.1.6, College of Computing and Informatics, Philadelphia, PA, USA) and virtualized by knowledge maps. RESULTS：In total, 9832 publications were included in this analysis. The results from the WoSCC showed that the United States of America (Count = 2268, 40.33%), Stanford University (Count = 141, 2.51%), and the United States Department of Health and Human Services were the leading country, institute, and funding agency regarding the number of publications, respectively. 'Cognitive-behavioural therapy" was the most popular research topic generated from the cocited reference. The most frequently co-occurring keywords were insomnia, cognitive behavioural therapy, disorder, depression, quality of life, Meta-analysis, older adult, sleep, prevalence and efficacy, while keywords including clinical practice guideline, guideline, and Tai Chi remained popular after 2021. Circadian rhythm was the strongest research frontier for 2000-2021. In China, Chengdu University of Traditional Chinese Medicine (Count = 69, 4.79%) was the most productive institute in this field. The most frequently co-occurring keywords from Chinese literature were sleep disorder, sleep quality, acupuncture and moxibustion, Parkinson's disease, transcranial magnetic stimulation, health education, music therapy, chronic insomnia, quality of life, and nonmotor symptoms. Traditional Chinese medicine was the strongest research frontier for 2019-2021. CONCLUSION: This bibliometric study provides an exhaustive mapping encompassing pertinent institute, publications, influential articles, researchers and topics of the global trend of nondrug and nonsedative hypnotic treatment for insomnia. The results show that the research trend has shifted from primary studies on the efficacy and safety of nondrug and nonsedative hypnotic treatment for insomnia to comorbidity studies. Clinical practice guidelines will potentially become the research frontier for this field post-2021. The findings are important for researchers, clinicians, journal editors, and policy-makers working in the field of nondrug and nonsedative hypnotic treatment for insomnia to understand the strengths and potentials in the current studies and guide future clinical practice, research, and science policy.

Cardiac-specific deletion of BRG1 ameliorates ventricular arrhythmia in mice with myocardial infarction.

Malignant ventricular arrhythmia (VA) after myocardial infarction (MI) is mainly caused by myocardial electrophysiological remodeling. Brahma-related gene 1 (BRG1) is an ATPase catalytic subunit that belongs to a family of chromatin remodeling complexes called Switch/Sucrose Non-Fermentable Chromatin (SWI/SNF). BRG1 has been reported as a molecular chaperone, interacting with various transcription factors or proteins to regulate transcription in cardiac diseases. In this study, we investigated the potential role of BRG1 in ion channel remodeling and VA after ischemic infarction. Myocardial infarction (MI) mice were established by ligating the left anterior descending (LAD) coronary artery, and electrocardiogram (ECG) was monitored. Epicardial conduction of MI mouse heart was characterized in Langendorff-perfused hearts using epicardial optical voltage mapping. Patch-clamping analysis was conducted in single ventricular cardiomyocytes isolated from the mice. We showed that BRG1 expression in the border zone was progressively increased in the first week following MI. Cardiac-specific deletion of BRG1 by tail vein injection of AAV9-BRG1-shRNA significantly ameliorated susceptibility to electrical-induced VA and shortened QTc intervals in MI mice. BRG1 knockdown significantly enhanced conduction velocity (CV) and reversed the prolonged action potential duration in MI mouse heart. Moreover, BRG1 knockdown improved the decreased densities of Na+ current (INa) and transient outward potassium current (Ito), as well as the expression of Nav1.5 and Kv4.3 in the border zone of MI mouse hearts and in hypoxia-treated neonatal mouse ventricular cardiomyocytes. We revealed that MI increased the binding among BRG1, T-cell factor 4 (TCF4) and ß-catenin, forming a transcription complex, which suppressed the transcription activity of SCN5A and KCND3, thereby influencing the incidence of VA post-MI.

Mxenes for membrane separation: from fabrication strategies to advanced applications.

Transition metal carbides/nitrides/carbonitrides, commonly referred to as MXenes, have gained widespread attention since their discovery in 2011 as a promising family of two-dimensional (2D) materials. Their impressive chemical, electrical, thermal, mechanical, and biological properties have fueled a surge in research focused on the synthesis and application of MXenes in various fields, including membrane-based separation. By engineering the materials and membrane structures, MXene-based membranes have demonstrated remarkable separation performance and added functionalities, such as antifouling and photocatalytic properties. In this review, we aim to have a timely and critical review of research on their fabrication strategy and performance in advanced molecular separation and ion exchange, beginning with a brief introduction of the preparation and physicochemical properties of MXenes. Finally, outlooks and future works are outlined with the aims to provide valuable insights and guidance for advancing membranes' applications in different separation domains.

Characteristics of abnormal coronary aorta origin in adults and cause analysis of missed diagnosis by transthoracic echocardiography / 医疗卫生装备

Objective To analyze the characteristics of adult anomalous aortic origin of coronary artery(AAOCA)and the causes of missed diagnosis by transthoracic echocardiography(TTE)so as to facilitate TTE in diagnosing adult AAOCA.Methods A total of 37 adult patients with AAOCA diagnosed by non-invasive coronary CT angiography(CCTA)and/or invasive coronary angiography(ICA)were selected as research samples at some hospital from January 2019 to December 2022,and their clinical symptoms and the findings of 12-lead electrocardiogram,cardiac enzymes and TTE were summarized;the patients were typed according to the site of origin of coronary artery anomalies,and the causes for the missed diagnosis of TTE were eplored.Chi-square test was used to compare the differences in TTE missed diagnoses.Results Of the 37 patients,31 ones had no or only mild symptoms;most ones had negative results in terms of 12-lead electrocardiography,cardiac enzymes,changes in the size of the cardiac chambers,segmental ventricular wall motion abnormalities and left ventricular systolic function.The patients with anomalous origin of the right coronary artery from left sinus(ARCA-L)gained the largest proportion of 59.45％(22/37);21 patients were diagnosed with anomalous origin of coronary artery arising from the opposite sinus(ACAOS)in the two examinations of TTE,of whom there were 19 cases of ARCA-L,and the detection rate of ACAOS by TTE was 87.5％;all the 13 patients origins in branches and high-grade openings were missed by TTE.The detection rate of ACAOS by TTE was significantly higher than that of coronary artery anomalies originating in branches and in high openings,and the difference was statistically significant(21/24 vs 0/13,P＜0.001).Conclusion Most adult AAOCA patients lack specificity in symptoms and related examination results.TTE has a high detection rate of ACAOS,while it is easy to miss the diagnosis of coronary artery anomalies originating from branches and high openings.Ultrasonographers have to identify false negative AAOCA by multi-section and multi-angle scanning and color Doppler flow imaging in order to reduce the rate of missed diagnosis.[Chinese Medical Equipment Journal,2024,45(1):71-75]

Molecular genetic analysis and identification of novel alleles of ABO subtypes / 中国输血杂志

【Objective】 To study the molecular mechanism of 95 samples of serological ABO subtypes. 【Methods】 A total of 95 samples with discrepancy between forward and reverse blood grouping were subjected to serological confirmation, and genotyped by polymerase chain reaction with sequence-specific primers (PCR-SSP). For those subtype alleles could not be detected by PCR-SSP, ABO gene exon 1-7 sequencing and gene single strand sequencing were performed successively to determine the mutation site and the gene location. 【Results】 A total of 34 ABO alleles were detected in 95 samples. Five common ABO alleles (ABO*A1.01, ABO*A1.02, ABO*B.01, ABO*O.01.01 and ABO*O.01.02) and 29 rare ABO alleles were identified, including 16 named alleles by ISBT (ABO*A2.01, ABO*A2.05, ABO*A2.13, ABO*A3.07, ABO*AW.37, ABO*AEL.05, ABO*B3.01, ABO*B3.05, ABO*BW.03, ABO*BW.07, ABO*BW.27, ABO*BEL.03, ABO*cisAB.01, ABO*cisAB.05, ABO*BA.02, ABO*BA.04) and 5 named alleles by dbRBC(A223, B309, Bw37, Bel09, Bw40)and eight unnamed alleles [ABO*B.01+ 978C>A, ABO*A1.02+ 248A>T, ABO*B.01+ 125dupT, ABO*B.01+ (98+ 1G>A), ABO*A1.02/ABO*B.01+ 1A>G, ABO*A1.02/ABO*O.01.01+ 28G>T, ABO*A1.02/ABO*B.01+ 538C>T, ABO*A1.02/ABO*O.01.01+ 797insT] .The last four samples could not be verified by single strand because of insufficient samples. In 95 samples, 76 samples (21 named alleles of ISBT and dbRBC) were identified by PCR-SSP, and the remaining 19 samples were identified by exon 1-7 sequencing of ABO gene, of which 8 were identified as unnamed alleles, and the remaining 11 samples were not identified as subtype alleles. 【Conclusion】 The molecular genetic mechanism of 95 serological ABO subtypes was revealed, and 8 rare novel alleles were identified. The detection of ambiguous blood groups is influenced by factors such as patient pathology and physiology, therefore the combination of serological testing and genetic testing is suggested for the identification of ABO subtype.

Discussion of factors influencing preclinical studies based on fecal bacteria transplantation in mice / 中国实验动物学报

Fecal microbiota transplantation(FMT)is a therapeutic approach that targets intestinal microorganisms by transplanting fecal microorganisms from healthy individuals into the gastrointestinal tract of diseased individuals,thus restoring the recipient's disordered gastrointestinal microbiota by restructuring the intestinal flora.However,the mechanism of action and adverse effects of FMT in different diseases have not yet been clarified,thus limiting its wide clinical application.Its use still relies on in-depth preclinical studies;however,highly inconsistent or incomplete experimental details provided in current reports,coupled with a lack of authoritative standards and recommendations,seriously affect the interpretation of the study findings and replication of the experimental procedures,as well as hindering the clinical translation of the result.We therefore review and discuss the key steps of recipient selection and graft sample collection,storage,graft material preparation,and grafting route,with the aim of improving the utilization of experimental animals,consumables,and labor,and providing method ological recommendations and references to achieve replicability and standardization of preclinical FMT studies.

Research progress of proteomics related to diabetic foot / 中国糖尿病杂志

Diabetic foot(DF)is one of the most severe chronic complications of diabetes mellitus(DM),and it is an important cause of disability and mortality inpatients with DM.Changes in proteins in the tissues,organs and circulation of organisms can serve as microscopic reflections of the disease development process.Proteomics is an important technologyto explore the pathogenesis and treatment mechanism of dis-ease,and to find potential therapeutic targets and prognostic biomarkers of diseases.This article reviews the progress of proteomics research in DF.

Correlation Analysis between the Common Clinical Indexes and Diabetic Foot Ulcer / 昆明医科大学学报

Objective To analyze the relationship between the common clinical indicators and diabetic foot ulcer(DFU)in type 2 diabetes mellitus(T2DM)patients by using the cross-sectional study and to provide the reference indicators for clinical DFU monitoring and prognosis evaluation.Methods A total of 115 T2DM patients admitted to the Department of Endocrinology,the Second Affiliated Hospital of Kunming Medical University from June 2021 to June 2023 were selected as the study objects and were divided into group A(with DFU)and group B(without DFU)according to whether they had DFU.Those in group A were then divided into group A1(Wagner0-1),group A2(Wagner2-3)and group A3(Wagner4)according to Wagner classification.The differences of general data,blood pressure,blood glucose,blood lipids and other common clinical indicators among all of the groups were compared,and the correlation between DFU and the above indicators was explored.Results Diabetes duration,D-dimer(DD),systolic blood pressure and other indexes in group A were higher than those in group B and there was a statistically significant difference(P<0.05).DD was the main risk factor for DFU in T2DM patients.Diabetic course in patients with DFU was positively correlated with the age(r>0,P<0.05),and negatively correlated with fasting blood glucose(FPG)level and 2hPG level at 2 hours after meals(r<0,P<0.05).The levels of interleukin-6(IL-6)and C-reactive protein(CRP)in A1 and A2 groups were lower than those in A3 group,the levels of neutrophils and leukocytes in A1 group were lower than those in A3 group,and the high density lipoprotein cholesterol(HDL-C)in A1 group was higher than that in A2 group and there was a statistically significant difference(P<0.05).Conclusion DD and systolic blood pressure are the main risk factors for DFU,and DD is closely related to DFU.The older the patients with T2DM,the later the onset of DFU.The worse the blood glucose control,the earlier the onset of DFU.HDL-C is a protective factor for peripheral vascular disease in T2DM patients.

Influence of NIC X-FILE and DENCO Pre-Shaper nickel-titanium instruments on the shaping of simulated curved canals / 中国组织工程研究

BACKGROUND:Root canal preparation is a key step in root canal therapy.In recent years,with the rapid development of new nickel-titanium instruments,the results of root canal shaping ability have been significantly improved.However,the shaping abilities of different nickel-titanium instruments are also different.At present,there are few reports about the influence of the shaping ability of R-phase heat treatment NIC X-FILE and DENCO Pre-Shaper in simulated curved canals. OBJECTIVE:To compare the shaping effect of NIC X-FILE and DENCO Pre-Shaper nickel-titanium instruments in preparation for simulated curved canals. METHODS:Fifty simulated resin-curved canals were selected and randomly divided into two groups(n=25).NIC X-FILE and DENCO Pre-Shaper nickel-titanium files were used for root canal preparation.The root canal preparation time was recorded.Images of pre-and post-root canal preparation were taken.Image processing and analysis software were used to measure the amount of resin removed from the inner and outer walls of the root canal at each observation point.Statistical software was used to compare the root canal preparation time and centering ability of two kinds of mechanical nickel-titanium files. RESULTS AND CONCLUSION:(1)The average root canal preparation time was(1.58±0.02)minutes in the DENCO Pre-Shaper group and(2.22±0.03)minutes in the NIC X-FILE group.There was a significant difference between the two groups(P<0.05).(2)The amount of resin removed from the inner walls of the root canal of the DENCO Pre-Shaper group at 4,5,7,8,9,and 10 mm from the apical foramen was higher than that of the NIC X-FILE group(P<0.05).The amount of resin removed from the outer walls of the root canal of the DENCO Pre-Shaper group at 3,5,6,7,and 8 mm from the apical foramen was lower than that of the NIC X-FILE group(P<0.05).(3)At 2,4,5,6,7,8,and 9 mm away from apical foramen,the centering ability of the NIC X-FILE group was better than that of the DENCO Pre-Shaper group(P<0.05),and the centering ability of the NIC X-FILE group was the best at 4 mm away from apical foramen.(4)The results show that DENCO Pre-Shaper has higher mechanical efficiency than NIC X-FILE nickel-titanium root canal files.However,the centering ability of DENCO Pre-Shaper is inferior to NIC X-FILE nickel-titanium root canal files.

Effect of follicle-stimulating hormone and luteinizing hormone on apoptosis, autophagy, and the release and reception of some steroid hormones in yak granulosa cells through miR-23a/ASK1 axis.

Follicle-stimulating hormone (FSH), luteinizing hormone (LH), miR-23a, apoptosis signal-regulating kinase 1(ASK1)/c-Jun N-terminal kinase (JNK), autophagy and apoptosis play crucial roles in follicular development. However, their role in yak granulosa cells (GCs) remains unknown. Therefore, we examined the effect of miR-23a, ASK1, FSH, and LH on apoptosis, autophagy, and the release and reception of some steroid hormones in these cells. Our results showed that miR-23a overexpression significantly increased the abundance of Beclin1, the LC3II/I ratio, and the number of Ad-mRFP-GFP-LC3-labeled autophagosomes, and decreased p62 abundance. Additionally, Bax abundance and the number of terminal deoxynucleotidyl transferase deoxynucleotide triphosphate nick end labeling-positive cells were reduced, while Bcl2 expression was increased. Overexpression of miR-23a also significantly increased the abundance of estradiol receptor α (ER-α) and ß (ER-ß) and the concentrations of estradiol (E2), progesterone (P4) in yak GCs. Here, treating yak GCs with miR-23a decreased ASK1 expression, which regulates ASK1/JNK-mediated apoptosis, autophagy, E2 and P4 levels, and ER-α/ß abundance. In contrast, treatment of yak GCs with FSH (10 µg/mL) and LH (100 µg/mL) increased miR-23a abundance, regulating the subsequent effect on ASK1/JNK-mediated apoptosis, autophagy, ER-α/ß abundance, and E2 and P4 concentrations. In conclusion, miR-23a enhances autophagy in yak GCs, attenuates apoptosis, and increases ER-α/ß abundance and E2 and P4 concentrations by downregulating ASK1. Additionally, FSH and LH can regulate these effects of miR-23a by altering its expression. These results provide important insights that can inform the development of strategies to reduce abnormal follicular atresia and improve the reproductive rate of yaks.

Pangenome obtained by long-read sequencing of 11 genomes reveal hidden functional structural variants in pigs.

Long-read sequencing (LRS) facilitates both the genome assembly and the discovery of structural variants (SVs). Here, we built a graph-based pig pangenome by incorporating 11 LRS genomes with an average of 94.01% BUSCO completeness score, revealing 206-Mb novel sequences. We discovered 183,352 nonredundant SVs (63% novel), representing 12.12% of the reference genome. By genotyping SVs in an additional 196 short-read sequencing samples, we identified thousands of population stratified SVs. Particularly, we detected 7,568 Tibetan specific SVs, some of which demonstrate significant population differentiation between Tibetan and low-altitude pigs, which might be associated with the high-altitude hypoxia adaptation in Tibetan pigs. Further integrating functional genomic data, the most promising candidate genes within the SVs that might contribute to the high-altitude hypoxia adaptation were discovered. Overall, our study generates a benchmark pangenome resource for illustrating the important roles of SVs in adaptive evolution, domestication, and genetic improvement of agronomic traits in pigs.

Influencing factors for overweight and obesity in children with type 1 diabetes mellitus / 中华实用儿科临床杂志

Type 1 diabetes mellitus (T1DM) in children used to be manifested as emaciation, and overweight and obese children with T1DM are less observed.Therefore, these special population has not been concerned.However, in recent years, with the increase in the prevalence of T1DM in children, the rates of overweight and obese children with T1DM have on the rise.Overweight and obesity not only affect the growth and development of children, but also increases the risk of complications of T1DM that negatively affect the prognosis.Therefore, overweight and obesity have become a new problem in the long-term management of T1DM.This review aims to summarize the influencing factors for overweight and obesity in children with T1DM during follow-up, thus highlighting the management of the special population.This review provides reference for the monitoring of risk population of children with T1DM, timely performing clinical management and optimizing the therapeutic strategy of T1DM.

Clinical and genetic analyses of Joubert syndrome in children / 中国当代儿科杂志

OBJECTIVES@#To study the clinical and genetic features of Joubert syndrome (JS) in children.@*METHODS@#A retrospective analysis was performed on the clinical data, genetic data, and follow-up data of 20 children who were diagnosed with JS in the Department of Children's Rehabilitation, the Third Affiliated Hospital of Zhengzhou University, from January 2017 to July 2022.@*RESULTS@#Among the 20 children with JS, there were 11 boys and 9 girls. The common clinical manifestations were developmental delay (20 children, 100%), abnormal eye movement (19 children, 95%), and hypotonia (16 children, 80%), followed by abnormal respiratory rhythm in 5 children (25%) and unusual facies (including prominent forehead, low-set ears, and triangular mouth) in 3 children (15%), and no limb deformity was observed. All 20 children (100%) had the typical "molar tooth sign" and "midline cleft syndrome" on head images, and 6 children (30%) had abnormal eye examination results. Genetic testing was performed on 7 children and revealed 6 pathogenic genes, i.e., the CPLANE1, RPGRIP1L, MKS1, CC2D2A, CEP120, and AHI1 genes.@*CONCLUSIONS@#For children with developmental delay, especially those with abnormal eye movement and hypotonia, it is recommended to perform a head imaging examination to determine the presence or absence of "molar tooth sign" and "midline cleft syndrome", so as to screen for JS to avoid missed diagnosis and misdiagnosis. There are many pathogenic genes for JS, and whole-exome sequencing can assist in the diagnosis of JS.

Effect of a Novel Dihydroartemisinin Dimer Containing Nitrogen Atoms SM 1044 on Apoptosis of Human Leukemia Cell Line NB4-R1 / 中国实验血液学杂志

OBJECTIVE@#To investigate the effect of a water-soluble novel dihydroartemisinin dimer containing nitrogen atoms SM 1044 on the apoptosis of all-trans retinoic acid (ATRA) resistant acute promyelocytic leukemia (APL) NB4-R1 cells and its potential mechanism.@*METHODS@#The effects of SM 1044 on cell apoptosis, mitochondrial transmembrane potential, and the level of reactive oxygen species (ROS) were assessed by flow cytometry. Expressions of apoptosis-related proteins were determined by Western blot. The effects of SM 1044 on MAPK (ERK, JNK) signaling pathway, PML/RARα fusion protein, and expressions of apoptosis-related proteins were detected by Western blot.@*RESULTS@#SM 1044 could significantly induce apoptosis and the loss of mitochondrial transmembrane potential in NB4-R1 cells, and activate apoptosis-related proteins caspase-3, caspase-8, caspase-9 and poly (ADP-ribose) polymerase (PARP). SM 1044 could also induce NB4-R1 cells to produce ROS. Western blot showed that SM 1044 activated the phosphorylation of MAPK (ERK, JNK) signaling pathway and down-regulated the expression of PML/RARα fusion protein.@*CONCLUSION@#SM 1044 can induce apoptosis of ATRA resistant APL NB4-R1 cells, which may be related to ROS/ERK and ROS/JNK signaling pathway, and can also induce by down-regulating PML/RARα fusion protein.

Effects of butorphanol pretreatment on dexamethasone-induced discomfort symptoms / 中国医师进修杂志

Objective:To investigate the effect of pretreatment with butorphanol on perineal discomfort caused by intravenous injection of dexamethasone sodium phosphate.Methods:Using the method of prospective study, ninety patients undergoing elective gynecological surgery in Dalian Women And Children′s Medical Group from June to December 2021 were randomly divided into three groups: butorphanol 0.5 mg pretreatment group (group B1), butorphanol 1.0 mg pretreatment group (group B2) and normal saline control group (group C), with 30 cases in each group. Patients in groups B1 and B2 were given butorphanol 0.5 mg and 1.0 mg intravenously, respectively, prior to induction of anesthesia, while those in group C were given 0.9% sodium chloride injection. 3 minutes later, all patients in the three groups were given dexamethasone sodium phosphate injection 10 mg, and the incidence, grade and adverse reactions of their perineal discomfort symptoms were recorded.Results:The incidence of perineal discomfort and moderate perineal discomfort of patients in group B1 and group B2 was lower than that in group C: 20.00%(6/30)and 10.00%(3/30)vs. 60.00%(18/30), 3.33%(1/30)and 3.33(1/30)vs. 30.00%(10/30), with a statistically significant differences ( P<0.05). The incidence of adverse reactions such as dizziness was increased in the group B2:26.67%(8/30)and 10.00%(3/30)vs. 40.00%(12/30), with a statistically significant difference ( χ2 = 7.13, P = 0.028). Conclusions:Butorphanol 0.5 mg and 1.0 mg pretreatments are touted as effective in inhibiting perineal discomfort caused by intravenous injection of dexamethasone sodium phosphate. However, the butorphanol 0.5 mg pretreatment group have fewer adverse reactions.

Accuracy of Mean Value of Central Venous Pressure from Monitor Digital Display: Influence of Amplitude of Central Venous Pressure during Respiration / 中国医学科学杂志(英文版)

Background A simple measurement of central venous pressure (CVP)-mean by the digital monitor display has become increasingly popular. However, the agreement between CVP-mean and CVP-end (a standard method of CVP measurement by analyzing the waveform at end-expiration) is not well determined. This study was designed to identify the relationship between CVP-mean and CVP-end in critically ill patients and to introduce a new parameter of CVP amplitude (ΔCVP= CVPmax - CVPmin) during the respiratory period to identify the agreement/disagreement between CVP-mean and CVP-end.Methods In total, 291 patients were included in the study. CVP-mean and CVP-end were obtained simultaneously from each patient. CVP measurement difference (|CVP-mean - CVP-end|) was defined as the difference between CVP-mean and CVP-end. The ΔCVP was calculated as the difference between the peak (CVPmax) and the nadir value (CVPmin) during the respiratory cycle, which was automatically recorded on the monitor screen. Subjects with |CVP-mean - CVP-end|≥ 2 mmHg were divided into the inconsistent group, while subjects with |CVP-mean - CVP-end| < 2 mmHg were divided into the consistent group.Results ΔCVP was significantly higher in the inconsistent group [7.17(2.77) vs.5.24(2.18), P<0.001] than that in the consistent group. There was a significantly positive relationship between ΔCVP and |CVP-mean - CVP-end| (r=0.283, P <0.0001). Bland-Altman plot showed the bias was -0.61 mmHg with a wide 95% limit of agreement (-3.34, 2.10) of CVP-end and CVP-mean. The area under the receiver operating characteristic curves (AUC) of ΔCVP for predicting |CVP-mean - CVP-end| ≥ 2 mmHg was 0.709. With a high diagnostic specificity, using ΔCVP<3 to detect |CVP-mean - CVP-end| lower than 2mmHg (consistent measurement) resulted in a sensitivity of 22.37% and a specificity of 93.06%. Using ΔCVP>8 to detect |CVP-mean - CVP-end| >8 mmHg (inconsistent measurement) resulted in a sensitivity of 31.94% and a specificity of 91.32%.Conclusions CVP-end and CVP-mean have statistical discrepancies in specific clinical scenarios. ΔCVP during the respiratory period is related to the variation of the two CVP methods. A high ΔCVP indicates a poor agreement between these two methods, whereas a low ΔCVP indicates a good agreement between these two methods.

Association between cardiometabolic diseases and quality of life and the mediation effect of perceived stress / 中华心血管病杂志

Objective: To explore the association between cardiometabolic diseases (CMD) and quality of life, the association between CMD and perceived stress, and the mediation effect of perceived stress on the association between CMD and quality of life, and to provide evidence for the prevention and treatment of CMD and the improvement of quality of life in these patients. Methods: This is a cross-sectional study. Data were collected by the employees' physical examination of a company in Xi'an in 2021. Multiple linear regression models were used to analyze the association between the status of CMD (divided into three categories: no CMD, presence of one kind of CMD, and with≥2 kinds of CMD (≥2 kinds of CMD were defined as cardiometabolic multimorbidity (CMM)), quality of life, and perceived stress. Mediation analysis with a multi-categorical independent variable was conducted to determine the mediation effect of perceived stress on the association between CMD and quality of life. Results: Among all 4 272 participants, 1 457 (34.1%) participants had one kind of CMD and 677 (15.8%) participants had CMM. The average scores for quality of life and perceived stress were (57.5±15.7) and (16.9±7.9), respectively. Compared with participants without CMD, after adjusting for demographic and lifestyle factors, no statistically significant associations were observed between one kind of CMD and perceived stress or quality of life (both P>0.05). Perceived stress did not mediate the association between one kind of CMD and quality of life. However, participants with CMM had lower quality of life and higher perceived stress than participants without CMD. The relative total effect coefficient c (95%CI) and the relative direct effect coefficient c' (95%CI) between CMM and quality of life were -3.71 (-5.04--2.37) and -2.52 (-3.81--1.24) (both P<0.05), respectively. The relative indirect effect coefficient a2b (95%CI) of perceived stress on the association between CMM and quality of life was -1.18 (-1.62--0.77) (P<0.05). The mediation effect size was 31.8%. Conclusions: CMM is negatively associated with quality of life and positively associated with perceived stress. Perceived stress partially mediates the association between CMM and quality of life. Our results suggest that, in addition to preventing and treating CMM actively, efforts should be taken to relieve the perceived stress of people with CMM to improve their quality of life.

Recent research advances in the pathogenesis of cognitive dysfunction in diabetes mellitus / 中华老年医学杂志

Diabetic cognitive dysfunction, which refers to diabetes-induced impairment in language, visual memory, speed of information processing, and executive function, has been identified as a common complication of diabetes.It is highly prevalent in elderly diabetic patients.Therefore, it is necessary to understand the pathological structural changes and pathogenesis of diabetic cognitive dysfunction to help with early prevention and treatment of patients with clinical diabetic cognitive dysfunction.

Prenatal diagnosis of Pallister-Killian syndrome: a report of two cases / 中华围产医学杂志

This article reported two fetuses diagnosed with Pallister-Killian syndrome (PKS). Amniotic fluid samples of one pregnant woman (case 1), with an abnormal result of non-invasive prenatal test, were analyzed by karyotyping and copy number variation-sequencing (CNV-seq), and samples of the other one (case 2), with a prenatal ultrasound of a lowered spinal conus and an enhanced echo of the renal cortex, were tested for CNV-seq. The chromosome karyotype of case 1 showed 47,XN,+mar[30]/46, XN[10]. CNV-seq results revealed three to four copies of repetition of the p13.33p11.1 segment of chromosome 12, suggesting 12p tetrasomy chimerism in both fetuses. The diagnosis of fetal PKS was confirmed through the combination of multiple technologies (ultrasound, chromosomal karyotype analysis, and CNV-seq). The two pregnancies were terminated after genetic counseling.