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A modified chronic ocular hypertension rat model for retinal ganglion cell neuroprotection

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《医学前沿(英文)》 2013年 第7卷 第3期   页码 367-377 doi: 10.1007/s11684-013-0266-2

摘要:

This study aimed to modify a chronic ocular hypertension (OHT) rat model to screen for potential compounds to protect retinal ganglion cells (RGCs) from responding to increased intraocular pressure (IOP). A total of 266 rats were prepared and randomly grouped according to different time-points, namely, weeks 3, 8, 16, and 24. Rats were sedated and eye examination was performed to score as the corneal damage on a scale of 1 to 4. The OHT rat model was created via the injection of a hypertonic saline solution into the episcleral veins once weekly for two weeks. OHT was identified when the IOP at week 0 was≥6 mmHg than that at week -2 for the same eye. Viable RGCs were labeled by injecting 4% FluoroGold. Rats were sacrificed, and the eyes were enucleated and fixed. The fixed retinas were dissected to prepare flat whole-mounts. The viable RGCs were visualized and imaged. The IOP (meanβ±βSD) was calculated, and data were analyzed by the paired t-test and one-way ANOVA. The OHT model was created in 234 of 266 rats (87.97%), whereas 32 rats (12.03%) were removed from the study because of the absence of IOP elevation (11.28%) and/or corneal damage scores over 4 (0.75%). IOP was elevated by as much as 81.35% for 24 weeks. The average IOP was (16.68β±β0.98)βmmHg in non-OHT eyes (n = 234), but was (27.95±0.97)βmmHg in OHT eyes (n = 234). Viable RGCs in the OHT eyes were significantly decreased in a time-dependent manner by 29.41%, 38.24%, 55.32%, and 59.30% at weeks 3, 8, 16, and 24, respectively, as compared to viable RGCs in the non-OHT eyes (P<β0.05). The OHT model was successfully created in 88% of the rats. The IOP in the OHT eyes was elevated by approximately 81% for 24 weeks. The number of viable RGCs was decreased by 59% of the rats in a time-dependent manner. The modified OHT model may provide an effective and reliable method for screening drugs to protect RGCs from glaucoma.

关键词: chronic ocular hypertension     intraocular pressure     retinal ganglion cells     neuroprotection     glaucoma    

J-shaped association between dietary zinc intake and new-onset hypertension: a nationwide cohort study

《医学前沿(英文)》 2023年 第17卷 第1期   页码 156-164 doi: 10.1007/s11684-022-0932-3

摘要: We aimed to investigate the relationship of dietary zinc intake with new-onset hypertension among Chinese adults. A total of 12,177 participants who were free of hypertension at baseline from the China Health and Nutrition Survey were included. Dietary intake was assessed by three consecutive 24-h dietary recalls combined with a household food inventory. Participants with systolic blood pressure 140 mmHg or diastolic blood pressure 90 mmHg or diagnosed by a physician or under antihypertensive treatment during the follow-up were defined as having new-onset hypertension. During a median follow-up duration of 6.1 years, 4269 participants developed new-onset hypertension. Overall, the association between dietary zinc intake and new-onset hypertension followed a J-shape (P for non-linearity < 0.001). The risk of new-onset hypertension significantly decreased with the increment of dietary zinc intake (per mg/day: hazard ratio (HR) 0.93; 95% confidence interval (CI) 0.88–0.98) in participants with zinc intake < 10.9 mg/day, and increased with the increment of zinc intake (per mg/day: HR 1.14; 95% CI 1.11–1.16) in participants with zinc intake 10.9 mg/day. In conclusion, there was a J-shaped association between dietary zinc intake and new-onset hypertension in general Chinese adults, with an inflection point at about 10.9 mg/day.

关键词: dietary zinc intake     new-onset hypertension     general population     CHNS    

Metabolic hypertension: concept and practice

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《医学前沿(英文)》 2013年 第7卷 第2期   页码 201-206 doi: 10.1007/s11684-013-0264-4

摘要:

Hypertension is a serious public health problem worldwide. More than 60% of the risk factors for hypertension are associated with metabolic disturbances. Metabolic abnormalities increase the risk for hypertension and cause high blood pressure. Improving metabolic disturbances is beneficial for hypertension treatment. Due to the importance of metabolic abnormalities in the pathogenesis of hypertension, we propose a concept of metabolic hypertension. In this review, we discuss and review the clinical types, pathogenesis, risk evaluation and management of metabolic hypertension. Elucidation of the mechanism of metabolic hypertension should facilitate the design of novel pharmacotherapeutics and dedicated antihypertensive manipulations.

关键词: hypertension     cardiometabolic risk factors     metabolic abnormalities    

Perioperative management for parturients with pulmonary hypertension: experience with 30 consecutive

null

《医学前沿(英文)》 2013年 第7卷 第3期   页码 395-395 doi: 10.1007/s11684-013-0289-8

Effectiveness of lifestyle intervention for hypertension in Shanghai communities: Results from the ShanghaiHypertension Detail Management Program

Xin-Jian LI MD, Min-Na CHENG MPH, Yu-Heng WANG MD, Sun MIAO MPH, Zong-Qi ZHANG PhD, Yi-Sheng CHEN MD, Wei LU PhD,

《医学前沿(英文)》 2010年 第4卷 第1期   页码 67-70 doi: 10.1007/s11684-010-0023-8

摘要: A community-based multi-center randomized controlled trial was conducted to evaluate the effectiveness of blood pressure control for hypertension patients in communities in urban Shanghai by integrated intervention. At present, patients (=1395) from four communities have completed follow-up for one year, including the intervention group (=921) and usual care group (=474). The intervention programs included disease management by a care manager. Blood pressure of each patient was measured regularly. Compared with the control group, the net change of mean systolic blood pressure (SBP) was −6.75 (95% CI: −7.79 to −5.71, <0.001) mmHg, mean diastolic blood pressure (DBP) was −4.29 (95% CI: −5.08 to −3.49, <0.001) mmHg, and mean pulse pressure (PP) was −2.46 (95% CI: −3.50 to −1.43, <0.001) mmHg in the intervention group. The net change extent was larger in patients with regular pharmacological treatment than in those with irregular pharmacological treatment or non-pharmacological treatment. The measures of integrated intervention for hypertension patients in communities can lower significantly not only SBP and DBP, but also PP. It is suggested that measures of integrated intervention can decrease the risk of cardiovascular diseases in hypertension patients.

关键词: hypertension     community     pharmacological adherence     control of blood pressure    

New perspective on the natural course of chronic HBV infection

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《医学前沿(英文)》 2014年 第8卷 第2期   页码 129-134 doi: 10.1007/s11684-014-0339-x

摘要:

Chronic hepatitis B virus (HBV) infection is a significant threat to public health and an enormous burden on society. Mechanisms responsible for chronic HBV infection remain poorly understood. A better understanding of the natural course of chronic HBV infection may shed new light on the mechanisms underlying this disease and help in designing new antiviral strategies. Natural course of chronic HBV infection is conventionally viewed as an uninterrupted process that is usually marked by HBV e antigen (HBeAg) seroconversion or characterized by different phases associated with assumed host responses to HBV infection. However, none of these descriptions captures or highlights the core events that determine the natural course of chronic HBV infection. In this review, we briefly present the current knowledge on this subject and explain the significance and implication of events that occur during infection. A pre-core mutant becomes predominant in the viral population following elimination of the wild-type virus in duck hepatitis B virus-chronically infected animals. The coupled events in which first there is viral clearance that clears wild-type virus and then there is the reinfection of wild-type virus cleared livers with mutant virus are highly relevant to understanding of the natural course of chronic HBV infection under both treated and untreated conditions. In our new perspective, a general natural course of chronic HBV infection comprises cycles of viral clearance and reinfection, and such cycles prolong the chronic HBV infection course. Reviewing published data on the natural course of chronic HBV infection can reduce the possibility of missing important points in the initial data interpretation.

关键词: hepatitis B virus     chronic HBV infection     natural course     hepatitis B     seroconversion    

Effect of renal function and hemodialysis on the serum tumor markers in patients with chronic kidney

YU Xiaofang, XU Xialian, YE Zhibin

《医学前沿(英文)》 2007年 第1卷 第3期   页码 308-311 doi: 10.1007/s11684-007-0059-6

摘要: In patients with chronic renal failure, whether they have had hemodialysis or not, the specificity of some of the serum tumor markers for the diagnosis of the corresponding tumors is decreased while others remain as valuable as they are in patients with normal kidney function. The detection of tumor markers is extensively used for the diagnosis of corresponding tumors. It has been recently shown that some tumor markers are higher in patients with chronic kidney disease (CKD) than in the normal population. The effects of renal function and hemodialysis were examined on serum levels of some of the tumor markers including CEA, CA, CA, AFP, CA, CA, CYFRA, NSE, SCC-Ag, PSA, and fPSA. The 232 non-dialysis patients with CKD and 37 chronic uremic patients treated with maintenance hemodialysis were enrolled in this study. The 232 non-dialysis patients were divided into three groups according to their Ccr. In group 1, Ccr was ≤25 mL/min. In group 2, Ccr was between 25 and 50 mL/min. In group 3, Ccr was ≥50 mL/min. The male patients were also divided into three groups to compare the serum levels of PSA and fPSA among the three groups. Nine tumor markers in 37 uremic patients were tested. For comparison, 37 non-dialysis patients with similar Ccr of the same age and gender served as controls. There existed significant differences in serum levels of CEA, CA, CYFRA, NSE, and SCC-Ag among different Ccr groups and the markers bore a negative correlation with Ccr. There were no significant differences among the three groups in the serum concentrations of CA, AFP, CA, CA, PSA and fPSA. The serum levels of CA and NSE were significantly higher (199, CYFRA, NSE, CA and SCC-Ag for the diagnosis of the corresponding tumors was decreased while serum AFP, CA, CA, PSA and fPSA were as valuable as they were in patients with normal kidney function. Hemodialysis further increased the serum level of CA and NSE.

关键词: CKD     non-dialysis     valuable     detection     chronic    

Acupuncture is ineffective for chronic low back pain? A critical analysis and rethinking

Xuqiang Wei, Baoyan Liu

《医学前沿(英文)》 2021年 第15卷 第5期   页码 767-775 doi: 10.1007/s11684-020-0785-6

摘要: Acupuncture is a promising treatment for relieving pain and improving lower back function in clinical practice. However, evidence from randomized clinical trials (RCTs) remains controversial. Most RCTs conclude that acupuncture procedures for chronic low back pain (CLBP) had no significant difference in efficacy and belonged to placebo. We carefully reviewed and analyzed the methodology and implementation of sham acupuncture in RCTs. Controversial evidence of acupuncture for CLBP is only a microcosm of the evaluation methodological limitation of acupuncture. Inappropriate selection of sham acupuncture controls, rigorous RCT research models, and incorrect interpretation of results may contribute to negative evidence. Evaluating and disregarding the holistic efficacy of acupuncture with an explanatory RCT model based on evaluation drugs may be unwise. Moreover, sham acupuncture is often proven to be non-inert, unreasonable, and with low fidelity. Pitfalls of the explanatory RCT model and sham acupuncture design should be avoided. Establishing a new evaluation system that is in line with the clinical characteristics of acupuncture and obtaining high-quality evidence are difficult but promising tasks.

关键词: chronic low back pain     sham acupuncture     acupuncture     methodology     therapeutic evaluation    

Vaccine therapies for chronic hepatitis B: can we go further?

null

《医学前沿(英文)》 2014年 第8卷 第1期   页码 17-23 doi: 10.1007/s11684-014-0313-7

摘要:

Chronic hepatitis B is a major health burden worldwide. In addition to the recent progress in antiviral treatment, therapeutic vaccination is a promising new strategy for the control of chronic hepatitis B. On the basis of the major specific and non-specific immune dysregulations and defects in chronic hepatitis B patients, this paper presents the peptide and protein-based, DNA-based, cell-based, and antigen-antibody-based therapeutic vaccines, which have undergone clinical trials. The advantages, disadvantages, and future perspectives for these therapeutic vaccines are discussed.

关键词: chronic hepatitis B     therapeutic     antigen-antibody complexes     DNA     vaccine    

Perceived resource support for chronic illnesses among diabetics in north-western China

null

《医学前沿(英文)》 2016年 第10卷 第2期   页码 219-227 doi: 10.1007/s11684-016-0441-3

摘要:

A high level of social support can improve long-term diabetes self-management. Support from a single source has been evaluated. This study aims to analyze support from multiple and multilevel sources for diabetic patients by using the Chronic Illness Resources Survey (CIRS). Factors influencing the utilization of the CIRS were also evaluated. A total of 297 patients with diabetes were investigated using the CIRS and Perceived Diabetes Self-management Scale in Shihezi City, China. Descriptive statistics were used to explain demographic variables and scores of the scales. Factors affecting the utilization of chronic illness resources were determined through univariate analysis and then examined by multivariate logistic regression analysis. Of the 297 diabetic patients surveyed, 67% failed to reach the standard (more than 3 points) of utilizing chronic illness resources. Moreover, utilization of chronic illness resources was positively moderately correlated with self-management of diabetes (r = 0.75, <0.05). According to the multivariate logistic regression analysis, age (OR, 3.42; 95%CI, 1.19–9.84) and monthly income (OR, 5.27; 95%CI, 1.86–14.90) were significantly positively associated with the CIRS score. Individuals with high school (OR, 2.61; 95%CI, 1.13–6.05) and college (OR, 3.02; 95%CI, 1.13–8.04) degrees obtained higher scores in the survey than those with elementary school education. Results indicated that utilization of resources and support for chronic illness self-management, particularly personal adjustment and organization, were not ideal among diabetics in the communities of north-western China. Improved utilization of chronic illness resources was conducive for proper diabetes self-management. Furthermore, the level of utilization of chronic illness resources increased with age, literacy level, and monthly income.

关键词: chronic illness resources survey     diabetes     community     north-western China    

Clinical characteristics of pulmonary hypertension in bronchiectasis

null

《医学前沿(英文)》 2016年 第10卷 第3期   页码 336-344 doi: 10.1007/s11684-016-0461-z

摘要:

Pulmonary hypertension (PH), as a complication of bronchiectasis, is associated with increased mortality. However, hemodynamic characteristics and the efficacy of pulmonary arterial hypertension (PAH) therapies in patients with bronchiectasis and PH remain unknown. Patients with bilateral bronchiectasis and concurrent PH were included in the study. Patient characteristics at baseline and during follow-up, as well as survival, were analyzed. This observational study was conducted in 36 patients with a mean age of 51.5 years (range, 17?74 years). The 6 min walking distance was 300.8±93.3 m. The mean pulmonary arterial pressure (PAP) was 41.5±11.7 mmHg, cardiac output was 5.2±1.4 L/min, and pulmonary vascular resistance was 561.5±281.5 dyn·s·cm5. The mean PAP was>35 mmHg in 75% of the cases. Mean PAP was inversely correlated with arterial oxygen saturation values (r = −0.45, P = 0.02). In 24 patients who received oral PAH therapy, systolic PAP was reduced from 82.4±27.0 mmHg to 65.5±20.9 mmHg (P = 0.025) on echocardiography after a median of 6 months of follow-up. The overall probability of survival was 97.1% at 1 year, 83.4% at 3 years, and 64.5% at 5 years. Given the results, we conclude that PH with severe hemodynamic impairment can occur in patients with bilateral bronchiectasis, and PAH therapy might improve hemodynamics in such patients. Prospective clinical trials focusing on this patient population are warranted.

关键词: bronchiectasis     hemodynamics     pulmonary hypertension    

Fast removal of ocular artifacts from electroencephalogram signals using spatial constraint independent

Bang-hua YANG,Liang-fei HE,Lin LIN,Qian WANG

《信息与电子工程前沿(英文)》 2015年 第16卷 第6期   页码 486-496 doi: 10.1631/FITEE.1400299

摘要: Ocular artifacts cause the main interfering signals within electroencephalogram (EEG) signal measurements. An adaptive filter based on reference signals from an electrooculogram (EOG) can reduce ocular interference, but collecting EOG signals during a long-term EEG recording is inconvenient and uncomfortable for the subject. To remove ocular artifacts from EEG in brain-computer interfaces (BCIs), a method named spatial constraint independent component analysis based recursive least squares (SCICA-RLS) is proposed. The method consists of two stages. In the first stage, independent component analysis (ICA) is used to decompose multiple EEG channels into an equal number of independent components (ICs). Ocular ICs are identified by an automatic artifact detection method based on kurtosis. Then empirical mode decomposition (EMD) is employed to remove any cerebral activity from the identified ocular ICs to obtain exact artifact ICs. In the second stage, first, SCICA applies exact artifact ICs obtained in the first stage as a constraint to extract artifact ICs from the given EEG signal. These extracted ICs are called spatial constraint ICs (SC-ICs). Then the RLS based adaptive filter uses SC-ICs as reference signals to reduce interference, which avoids the need for parallel EOG recordings. In addition, the proposed method has the ability of fast computation as it is not necessary for SCICA to identify all ICs like ICA. Based on the EEG data recorded from seven subjects, the new approach can lead to average classification accuracies of 3.3% and 12.6% higher than those of the standard ICA and raw EEG, respectively. In addition, the proposed method has 83.5% and 83.8% reduction in time-consumption compared with the standard ICA and ICA-RLS, respectively, which demonstrates a better and faster OA reduction.

关键词: Ocular artifacts     Electroencephalogram (EEG)     Electrooculogram (EOG)     Brain-computer interface (BCI)     Spatial constraint independent component analysis based recursive least squares (SCICA-RLS)    

Obesity and overweight prevalence and its association with undiagnosed hypertension in Shanghai population

null

《医学前沿(英文)》 2012年 第6卷 第3期   页码 322-328 doi: 10.1007/s11684-012-0204-8

摘要:

The aim of this study was to determine the prevalence of overweight and obese subjects in the Shanghai population of China and its association with undiagnosed hypertension, by taking age, gender and place of residence (urban or suburban) into account. A cross-sectional population-based survey was conducted in 2007. The sample included 13 359 participants aged 15–69 years. Weight, height, and blood pressure were recorded, and information about gender, age and place of residence was obtained. Overweight and obesity prevalence were calculated by the body mass index (BMI) definition recommended by Working Group on Obesity in China (normal weight, 18.5–23.9 kg/m2; overweight, 24–27.9 kg/m2; obesity,≥28 kg/m2). Undiagnosed hypertension was defined by China criteria in accord with that of WHO-ISH (subjects with systolic pressure≥140 mmHg, and/or diastolic pressure≥90 mmHg). Multiple logistic regression analyses were used to assess the association of overweight or obesity with undiagnosed hypertension by adjusting for age, gender and place of residence. The overall overweight, obesity, and undiagnosed hypertension prevalence were 27.6% (95% CI: 26.8–28.4), 6.6% (95% CI: 6.2–7.0), and 15.5% (95% CI: 14.9–16.1), respectively. Compared to normal weight subjects, the odds ratios (OR) for subjects who were overweight and had hypertension was 2.33 (95% CI: 2.10–2.59); that for obesity and hypertension was 4.27 (95% CI: 3.66–4.99). These data suggest that overweight and obesity prevalence and their association with undiagnosed hypertension are high in our study population.

关键词: overweight     obesity     undiagnosed hypertension     prevalence     association    

Improved control of hypertension following laparoscopic fundoplication for gastroesophageal reflux disease

null

《医学前沿(英文)》 2017年 第11卷 第1期   页码 68-73 doi: 10.1007/s11684-016-0490-7

摘要:

This study aims to determine whether successful laparoscopic fundoplication for gastroesophageal reflux disease (GERD) can improve the control of hypertension. We conducted an observational study of GERD patients with hypertension. The esophageal and gastroesophageal symptoms of these patients were successfully treated with laparoscopic fundoplication, as measured by the reduced GERD symptoms and proton pump inhibitor consumption. A hypertension control scale was used to classify the use of antihypertensive medications and the quality of blood pressure control before and after anti-reflux surgery. Wilcoxon signed-ranks test was used for the statistical analyses. Seventy GERD patients were included in the analysis and followed up for a mean period of 3.5±1.4 years. Prior to surgery, all participating patients were taking at least one class of antihypertensive medication, and 56 patients (80%) had intermittently high blood pressure. After surgery, the mean number of antihypertensive medication classes per patient was significantly reduced from 1.61±0.77 pre-procedure to 1.27±0.88 post-procedure (P?<?0.001). The blood pressure of 48 of the 56 cases (86%) with preoperative intermittent high blood pressure returned to normal post procedure. A total of 50 patients (71%) recorded improvements on the hypertension control scale, with the overall mean score decreasing from 3.1±1.0 pre-procedure to 1.4±1.0 post-procedure (P?<?0.001). Therefore, successful laparoscopic fundoplication may result in better blood pressure control in some hypertensive GERD patients. This result suggests a possible connection between gastroesophageal reflux and hypertension.

关键词: gastroesophageal reflux disease     hypertension     blood pressure     laparoscopic fundoplication    

Correlation between viral load and liver cirrhosis in chronic hepatitis B patients

Lili LIU MM , Jiyao WANG MD , Weimin SHE MM ,

《医学前沿(英文)》 2009年 第3卷 第3期   页码 271-276 doi: 10.1007/s11684-009-0054-1

摘要: The aim of this paper is to investigate the relationship between hepatitis B virus (HBV) DNA levels during the course and the progression to cirrhosis with chronic hepatitis B. A total of 239 chronic hepatitis B patients confirmed by liver biopsy between 2001 and 2007 were followed up for a median of 28 months. Compared with the patients without cirrhosis, the patients progressed to cirrhosis were older and with higher HBV-DNA levels at end point. However, there was no significant difference in cirrhosis progression between different HBV-DNA groups at baseline ( = 0.531). Kaplan-Meier analysis showed higher HBV-DNA level at endpoint had increasing risk of cirrhosis ( = 0.019). The results of Cox model indicated that HBV-DNA levels at endpoint, stage of fibrosis, negative hepatitis B e antigen, and γ-glutamyl transpeptidase at baseline were independent risk factors of cirrhosis. The relative risk ratios were 1.898, 1.918, 8.976, and 1.006, respectively. Progression to cirrhosis in chronic hepatitis B patients is correlated with HBV-DNA levels during follow-up.

关键词: hepatitis B     chronic     viral load     liver cirrhosis    

标题 作者 时间 类型 操作

A modified chronic ocular hypertension rat model for retinal ganglion cell neuroprotection

null

期刊论文

J-shaped association between dietary zinc intake and new-onset hypertension: a nationwide cohort study

期刊论文

Metabolic hypertension: concept and practice

null

期刊论文

Perioperative management for parturients with pulmonary hypertension: experience with 30 consecutive

null

期刊论文

Effectiveness of lifestyle intervention for hypertension in Shanghai communities: Results from the ShanghaiHypertension Detail Management Program

Xin-Jian LI MD, Min-Na CHENG MPH, Yu-Heng WANG MD, Sun MIAO MPH, Zong-Qi ZHANG PhD, Yi-Sheng CHEN MD, Wei LU PhD,

期刊论文

New perspective on the natural course of chronic HBV infection

null

期刊论文

Effect of renal function and hemodialysis on the serum tumor markers in patients with chronic kidney

YU Xiaofang, XU Xialian, YE Zhibin

期刊论文

Acupuncture is ineffective for chronic low back pain? A critical analysis and rethinking

Xuqiang Wei, Baoyan Liu

期刊论文

Vaccine therapies for chronic hepatitis B: can we go further?

null

期刊论文

Perceived resource support for chronic illnesses among diabetics in north-western China

null

期刊论文

Clinical characteristics of pulmonary hypertension in bronchiectasis

null

期刊论文

Fast removal of ocular artifacts from electroencephalogram signals using spatial constraint independent

Bang-hua YANG,Liang-fei HE,Lin LIN,Qian WANG

期刊论文

Obesity and overweight prevalence and its association with undiagnosed hypertension in Shanghai population

null

期刊论文

Improved control of hypertension following laparoscopic fundoplication for gastroesophageal reflux disease

null

期刊论文

Correlation between viral load and liver cirrhosis in chronic hepatitis B patients

Lili LIU MM , Jiyao WANG MD , Weimin SHE MM ,

期刊论文