Publications by authors named "Guohui Yan"

Background: Gestational diabetes mellitus (GDM) can lead to various adverse pregnancy outcomes for both mothers and infants, including gestational hypertension, premature rupture of membranes, preterm birth, macrosomia, large for gestational age (LGA) infants, and neonatal hypoglycemia. Previous studies have mainly focused on the overall risk of GDM for adverse maternal and neonatal outcomes, but there has been limited research specifically investigating the relationship between different patterns of abnormal oral glucose tolerance test (OGTT) results and adverse maternal and neonatal outcomes.

Objective: The study aimed to analyze the maternal and neonatal outcomes among GDM women with different OGTT patterns and to explore a new classification method capable of stratifying GDM into high-risk (GDM-HR) and low-risk subtypes based on OGTT results.

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Article Synopsis
  • The study aimed to evaluate how different MRI acquisition factors affect fetal brain measurements across multiple sites, focusing on structural measurements and developmental patterns.
  • A total of 340 MRI scans from 218 healthy fetuses were analyzed to identify the influence of field strength, manufacturer, resolution, and slice thickness on brain volume and morphology.
  • The results indicated that lower field strength and resolution led to measurement overestimations, but using the ComBat-GAM method effectively harmonized the data, allowing for accurate developmental assessment.
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Background: The fetal neurodevelopmental microstructural alterations of intrauterine exposure to preeclampsia (PE) or gestational hypertension (GH) remain unknown.

Purpose: To evaluate the differences in diffusion-weighted imaging (DWI) of the fetal brain between normotensive pregnancies and PE/GH pregnancies, with a focus on PE/GH pregnancies with fetal growth restriction (FGR).

Study Type: Retrospective matched case-control study.

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Objective: To investigate the role of MRI in the diagnosis and classification of fetal microtia.

Methods: Ninety-five fetuses with suspected microtia based on ultrasound and MRI performed within 1 week were enrolled in this study. The diagnosis based on MRI was compared with postnatal diagnosis.

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It is necessary to detect cadmium ions in seawater with high sensitivity because the pollution of cadmium ions seriously endangers the health and life of human beings. Nano-FeO/MoS/Nafion modified glassy carbon electrode was prepared by a drop coating method. The electrocatalytic properties of Nano-FeO/MoS/Nafion were measured by Cyclic Voltammetry (CV).

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Diffusion magnetic resonance imaging (dMRI) is an important tool in characterizing tissue microstructure based on biophysical models, which are typically multi-compartmental models with mathematically complex and highly non-linear forms. Resolving microstructures from these models with conventional optimization techniques is prone to estimation errors and requires dense sampling in the q-space with a long scan time. Deep learning based approaches have been proposed to overcome these limitations.

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Human activities have considerably increased nitrogen intake into waterways, resulting in the deterioration of water quality. The state of surface water requires special consideration in light of the water crisis caused by nitrogen pollution. In this study, the natural abundance of the nitrogen stable isotope ( N) is measured and sampled in sediments and compared with the total dissolved nitrogen (DN) in four main Chinese tributaries of Hun River upper reach, including the Dasuhe, Beisanjia, Beikouqian, and Nanzamu tributaries.

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Backgrounds: At present, there is no consensus on the induction methods in term pregnancy with borderline oligohydramnios. This study aimed to compare the effectiveness and pregnancy outcomes of labor induction with dinoprostone or single-balloon catheter (SBC) in term nulliparous women with borderline oligohydramnios.

Methods: We conducted a retrospective cohort study from January 2016 to November 2018.

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This study aimed to investigate the effect and mechanism of miR-26a-5p on cardiomyocyte injury induced by hypoxia/reoxygenation (H/R).After construction of an H/R model in rat cardiomyocyte H9c2 cells, miR-26a-5p in the cells was interfered with (cells transfected with miR-26a-5p inhibitor) or overexpressed (cells transfected with a miR-26a-5p mimics). The viability and the apoptosis rate of cells in each group were detected using CCK-8 and flow cytometry; the relationship between miR-26a-5p and WNT5A was verified by a dual-luciferase reporter assay; the expression of miR-26a-5p, WNT5A, cleavedcaspase3 and Wnt/β-catenin signaling pathway-related proteins in each group was detected using qRT-PCR or Western blot; LDH release, SOD, and GSH-PX activities in each group were detected by kit.

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Article Synopsis
  • Fetal growth restriction (FGR) is linked to a high fetal brain volume/liver volume (FBV/FLV) ratio, prompting the use of MRI for more reliable measurement than ultrasound.
  • The study examined 147 singleton pregnancies, comparing FBV/FLV ratios in normal fetuses and those with FGR, highlighting that FBV/FLV ratios decreased in normal fetuses as gestational age (GA) increased.
  • Results showed strong agreement among observers measuring FBV/FLV, with the ratio being significantly higher in FGR fetuses, achieving a high diagnostic value (ROC curve of 0.978) for identifying high-risk cases.
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Background: Prenatal diagnosis of placenta accreta spectrum (PAS) disorders is difficult. Magnetic resonance imaging (MRI) has been shown to be a useful supplementary method to ultrasound.

Purpose: To investigate diffusion MRI (dMRI) based tractography as a tool for detecting PAS disorders, and to evaluate its performance compared with anatomical MRI.

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An increasing body of evidence indicates the involvement of microRNAs (miRNAs/miRs) in the initiation and progression of colorectal cancer (CRC). miR-296-5p was recently identified as a tumor suppressor in a variety of human cancer types; however, its function in CRC remains largely unknown. The present study demonstrated that the expression of miR-296-5p was significantly downregulated in CRC tissues and cell lines.

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Fetal brain MRI has become an important tool for in utero assessment of brain development and disorders. However, quantitative analysis of fetal brain MRI remains difficult, partially due to the limited tools for automated preprocessing and the lack of normative brain templates. In this paper, we proposed an automated pipeline for fetal brain extraction, super-resolution reconstruction, and fetal brain atlasing to quantitatively map in utero fetal brain development during mid-to-late gestation in a Chinese population.

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Background: Prenatal diagnosis and classification of hypospadias are difficult and of value for management during perinatal and neonatal periods. The conventional approach for prenatal diagnosis of hypospadias is ultrasound; however, this technique may be inconclusive in certain cases, which prompts for further exploration with magnetic resonance imaging (MRI).

Purpose: To investigate the role of MRI in the prenatal diagnosis and classification of fetuses with hypospadias.

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The purpose of this study was to evaluate the effect of diode laser irradiation on Enterococcus faecalis (E. faecalis) and its lipoteichoic acid (LTA). Ninety-six freshly extracted single-rooted teeth were divided into six groups, n = 8 per group.

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MRI-based brain age prediction has been widely used to characterize normal brain development, and deviations from the typical developmental trajectory are indications of brain abnormalities. Age prediction of the fetal brain remains unexplored, although it can be of broad interest to prenatal examination given the limited diagnostic tools available for assessment of the fetal brain. In this work, we built an attention-based deep residual network based on routine clinical T2-weighted MR images of 659 fetal brains, which achieved an overall mean absolute error of 0.

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Background: A large number of studies have shown that diode laser can effectively kill Enterococcus faecalis (E. faecalis). However, to our knowledge there has been little information regarding high-level analysis of sterilization mechanism on E.

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Background: Coronary microcirculation reserve is an important field in the research of coronary artery disease, but it is difficult to identify clinically. Currently it is widely accepted that myocardial contrast echocardiography (MCE) is a safe, inexpensive method and has comparatively high image resolution. The present study used quantitative low-dose adenosine stress real-time (RT)-MCE to estimate myocardial perfusion and the coronary stenosis.

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Background: Fragmented QRS (fQRS) complexes on a routine 12-lead electrocardiogram were associated with adverse cardiac events, including sudden death in patients with coronary artery disease (CAD).

Objective: To investigate the relationship between the fQRS complex and global and regional left ventricular (LV) functions in patients with CAD.

Methods: The study consisted of 176 patients (68 ± 9 years; 145 [82%] men) with CAD with narrow QRS duration and preserved LV ejection fraction (>45%).

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Background: Left ventricular (LV) mechanical dyssynchrony can lead to impairment of LV function and is associated with adverse clinical outcomes in coronary artery disease (CAD) patients. The impact of LV dyssynchrony on exercise capacity (EC) in patients with CAD was investigated.

Methods And Results: An echocardiographic examination with tissue Doppler imaging and exercise treadmill testing in 151 CAD patients with normal LV ejection fraction was performed.

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Background: Patients with type 2 diabetes mellitus (DM) have increased risk of endothelial dysfunction and arterial stiffness. Levels of circulating endothelial progenitor cells (EPCs) are also reduced in hyperglycemic states. However, the relationships between glycemic control, levels of EPCs and arterial stiffness are unknown.

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Introduction: Coronary artery disease (CAD) is associated with increased dispersion of repolarization and sudden cardiac death. We sought to investigate whether ventricular dyssynchrony is associated with proarrhythmic repolarization dispersion as measured by T-wave alternans (TWA) in patients with CAD.

Methods And Results: We evaluated 154 patients (67 ± 9 years, 123 men) with documented CAD, who underwent exercise treadmill testing and echocardiographic examination.

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Aims: To study the effects of right low atrial septum (AS) and right atrial appendage (RAA) pacing on atrial mechanical function and dyssynchrony in patients with sinus node disease (SND) and paroxysmal atrial fibrillation (AF).

Methods And Results: Detailed echocardiographic examination was performed on 30 patients with SND and paroxysmal AF and a dual-chamber, dual sensing, dual response pacemaker with atrial lead implantation at AS(n= 15) or RAA(n= 15). Peak atrial velocities were recorded by pulsed tissue Doppler spectrum.

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Article Synopsis
  • The study examined the relationship between endothelial progenitor cells (EPCs) and pulmonary artery systolic pressure (PASP) in 174 patients with coronary artery disease, revealing that smokers had lower levels of specific EPCs compared to non-smokers.
  • Smokers showed a significantly higher prevalence of elevated PASP and related complications, such as increased pulmonary vascular resistance and impaired right ventricular function.
  • The findings suggest that smoking contributes to the depletion of circulating EPCs, which may be linked to pulmonary vascular dysfunction in patients with coronary artery disease.
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Aims: We sought to determine whether inter- or intra-ventricular systolic dyssynchrony contributes to the occurrence of elevated pulmonary artery systolic pressure (PASP) in patients with coronary artery disease (CAD).

Methods And Results: One hundred and fifty-three consecutive CAD patients with preserved left ventricular ejection fraction (LVEF >40%) were enrolled. Detailed echocardiography was performed to measure PASP, inter-ventricular dyssynchrony (Ts-RL: time difference between lateral and right free wall), and intra-ventricular dyssynchrony (Ts-SD, standard deviation of time to peak systolic velocity of 12 LV segments; Ts-12, maximal difference in Ts between any 2 of 12 LV segments; Ts-6-basal, maximal difference in Ts between any 2 of 6 basal LV segments).

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