Predictive value of left ventricular ejection fraction reserve assessed by SPECT G-MPI for major adverse cardiovascular event in patients with coronary artery disease / 中华心血管病杂志

Objective: To evaluate the prognostic value of left ventricular ejection fraction (LVEF) reserve assessed by gated SPECT myocardial perfusion imaging (SPECT G-MPI) for major adverse cardiovascular event (MACE) in patients with coronary artery disease. Methods: This is a retrospective cohort study. From January 2017 to December 2019, patients with coronary artery disease and confirmed myocardial ischemia by stress and rest SPECT G-MPI, and underwent coronary angiography within 3 months were enrolled. The sum stress score (SSS) and sum resting score (SRS) were analyzed by the standard 17-segment model, and the sum difference score (SDS, SDS=SSS-SRS) was calculated. The LVEF at stress and rest were analyzed by 4DM software. The LVEF reserve (ΔLVEF) was calculated (ΔLVEF=stress LVEF-rest LVEF). The primary endpoint was MACE, which was obtained by reviewing the medical record system or by telephone follow-up once every twelve months. Patients were divided into MACE-free and MACE groups. Spearman correlation analysis was used to analyze the correlation between ΔLVEF and all MPI parameters. Cox regression analysis was used to analyze the independent factors of MACE, and the optimal SDS cutoff value for predicting MACE was determined by receiver operating characteristic curve (ROC). Kaplan-Meier survival curves were plotted to compare the difference in the incidence of MACE between different SDS groups and different ΔLVEF groups. Results: A total of 164 patients with coronary artery disease [120 male; age (58.6±10.7) years] were included. The average follow-up time was (26.5±10.4) months, and a total of 30 MACE were recorded during follow-up. Multivariate Cox regression analysis showed that SDS (HR=1.069, 95%CI: 1.005-1.137, P=0.035) and ΔLVEF (HR=0.935, 95%CI: 0.878-0.995, P=0.034) were independent predictors of MACE. According to ROC curve analysis, the optimal cut-off to predict MACE was a SDS of 5.5 with an area under the curve of 0.63 (P=0.022). Survival analysis showed that the incidence of MACE was significantly higher in the SDS≥5.5 group than in the SDS<5.5 group (27.6% vs. 13.2%, P=0.019), but the incidence of MACE was significantly lower in the ΔLVEF≥0 group than in theΔLVEF<0 group (11.0% vs. 25.6%, P=0.022). Conclusions: LVEF reserve (ΔLVEF) assessed by SPECT G-MPI serves as an independent protective factor for MACE, while SDS is an independent risk predictor in patients with coronary artery disease. SPECT G-MPI is valuable for risk stratification by assessing myocardial ischemia and LVEF.

Predictive value of the proportion of hibernating myocardium in total perfusion defect on reverse remodeling in patients with HFrEF underwent coronary artery bypass graft / 中华心血管病杂志

Objective: To evaluate the predictive value of the proportion of hibernating myocardium (HM) in total perfusion defect (TPD) on reverse left ventricle remodeling (RR) after coronary artery bypass graft (CABG) in patients with heart failure with reduced ejection fraction (HFrEF) by 99mTc-methoxyisobutylisonitrile (MIBI) single photon emission computed tomography (SPECT) myocardial perfusion imaging (MPI) combined with 18F-flurodeoxyglucose (FDG) gated myocardial imaging positron emission computed tomography (PET). Methods: Inpatients diagnosed with HFrEF at the Cardiac Surgery Center, Anzhen Hospital of Capital Medical University from January 2016 to January 2022 were prospectively recruited. MPI combined with 18F-FDG gated PET was performed before surgery for viability assessment and the patients received follow-up MPI and 18F-FDG gated PET at different stages (3-12 months) after surgery. Δ indicated changes (post-pre). Left ventricular end-systolic volume (ESV) reduced at least 10% was defined as RR, patients were divided into reverse remodeling (RR+) group and the non-reverse group (RR-). Binary logistic regression analysis was used to identify predictors of RR. Receiver operating characteristic (ROC) curve analysis was performed and the area under the curve (AUC) was calculated to assess the cut-off value for predicting RR. Additionally, we retrospectively enrolled inpatients with HFrEF at the Cardiac Surgery Center, Anzhen Hospital of Capital Medical University from January 2021 to January 2022 as the validation group, who underwent MPI and 18F-FDG gated PET before surgery. Echocardiography was performed before CABG and after CABG (3-12 months). In the validation group, the reliability of obtaining the cut-off value for the ROC curve was verified. Results: A total of 28 patients with HFrEF (26 males; age (56.9±8.7) years) were included in the prospective cohort. HM/TPD was significantly higher in the RR+ group than in the RR- group ((51.8%±17.9%) vs. (35.7%±13.9%), P=0.016). Binary logistic regression analysis revealed that HM/TPD was an independent predictor of RR (Odds ratio=1.073, 95% Confidence interval: 1.005-1.145, P=0.035). ROC curve analysis revealed that HM/TPD=38.3% yielded the highest sensitivity, specificity, and accuracy (all 75%) for predicting RR and the AUC was 0.786 (P=0.011). Meanwhile, a total of 100 patients with HFrEF (90 males; age (59.7±9.6) years) were included in the validation group. In the validation group, HM/TPD=38.3% predicted RR in HFrEF patients after CABG with the highest sensitivity, specificity and accuracy (82%, 60% and 73% respectively). Compared with the HFrEF patients in the HM/TPD<38.3% group (n=36), RR and cardiac function improved more significantly in the HM/TPD≥38.3% group (n=64) (all P<0.05). Conclusions: Preoperative HM/TPD ratio is an independent factor for predicting RR in patients with HFrEF after CABG, and HM/TPD≥38.3% can accurately predict RR and the improvement of cardiac function after CABG.

Effect of individual case management of COPD patients in respiratory nursing outpatient department / 中华健康管理学杂志

Objective:To explore the effect of case management of chronic obstructive pulmonary disease (COPD) in the nurse-led clinics.Methods:A total of 50 patients with COPD who met the selection criteria in the outpatient department of the respiratory department of Shantou Central Hospital were enrolled from March 2019 to March 2020. Case management was carried out by specialist nurses in the outpatient department. Body Mass Index (BMI), the forced expiratory volume in one second/predicted value ratio (FEV 1%pred), modified British medical research council (mMRC), 6-min walking distance (6MWD), COPD assessment test (CAT), and St.George Respiratory Questionnaire (SGRQ), basic activities of daily living (BADL) were compared before and after 6 months′ case management. The difference of medication compliance after case management was also analyzed. Results:There were statistically significant differences in the mMRC[(1.9±1.2) vs (1.4±1.1) points], 6MWD[(238.1±84.9) vs (284.1±113.8) m] and CAT scores [(19.7±6.6) vs (17.1±5.9) points], which suggested the improvement of dyspnea, self-conscious symptoms and exercise performance in these patients (all P<0.05). The BADL scores [(87.8±5.4) vs (90.00±7.5) points] and the total score of SGRQ [(48.0±7.3) vs (45.0±6.9) points] were significantly different (both P<0.01). These indicators were improved after the implementation of case management. Patients were followed up for 1 month, 3 months and 6 months, and the improvement of medication compliance score was statistically significant [(7.1±0.8) vs (7.4±0.8) vs (7.7±0.5) points] ( P<0.01). Conclusion:The implementation of respiratory nursing clinic can effectively manage COPD patients, improve medication compliance of patients, so as to improve the degree of dyspnea, self-conscious symptoms, self-care ability and exercise endurance of patients.

Value of autism screening checklists in the early identification of autism spectrum disorder / 中国当代儿科杂志

OBJECTIVE@#To evaluate the value of autism screening checklists in the early identification of autism spectrum disorder (ASD).@*METHODS@#A total of 2 571 children who attended the Children's Hospital of Chongqing Medical University and completed autism screening and diagnostic test were enrolled as subjects, among whom 2 074 were diagnosed with ASD, 261 were diagnosed with global developmental delay (GDD), 206 were diagnosed with developmental language disorder (DLD), and 30 had normal development. The sensitivity, specificity, and optimal threshold value of the Modified Checklist for Autism in Toddlers (M-CHAT) and the Autism Behavior Checklist (ABC) for the early identification of ASD were evaluated by the receiver operating characteristic (ROC) curve.@*RESULTS@#The M-CHAT had a high sensitivity of 88.3% but a low specificity of 36.0% for the identification of ASD. Its sensitivity decreased with age, and was maintained above 80% for children aged 16 to < 48 months. The ABC had a high specificity of 87.3% but a low sensitivity of 27.2%, with an optimal cut-off value of 47.5 based on the ROC curve analysis. The multivariate linear regression model based on a combination of the M-CHAT and ABC for screening of ASD showed a specificity of 85.8% and a sensitivity of 56.6%.@*CONCLUSIONS@#The M-CHAT has a high sensitivity and a low specificity in the identification of ASD, with a better effect in children aged 16 to < 48 months. The ABC has a high specificity and a low sensitivity. The multiple linear regression model method based on the combined M-CHAT and ABC to screen ASD appears to be effective.

Association between brain glucose metabolism and cardiac dysfunction in patients with ischemic heart disease undergoing (18)F-FDG PET/CT imaging / 中华心血管病杂志

Objective: To evaluate the relationship between the brain glucose metabolism and left ventricular function parameters, and to explore the cerebral glucose metabolism reduction regions in patients with ischemic heart disease (IHD). Methods: A total of 110 consecutive IHD patients who underwent gated (99)Tc(m)-sestamibi (MIBI) SPECT/CT myocardial perfusion imaging, gated (18)F-fluorodeoxyglucose (FDG) PET/CT myocardial and brain glucose metabolic imaging within three days in Beijing Anzhen Hospital from April 2016 to October 2017, were enrolled in this study. Left ventricular functional parameters of SPECT/CT and PET/CT including end-diastolic volume (EDV), end-systolic volume (ESV) and left ventricular ejection fraction (LVEF) were analyzed by QGS software. Viable myocardium and myocardial infarction region were determined by 17-segment and 5 score system, and the ratio of viable myocardium and scar myocardium was calculated. According to the range of viable myocardium, the patients were divided into viable myocardium<10% group (n=44), viable myocardium 10%-<20% group (n=36) and viable myocardium≥20% group (n=30). Pearson correlation analysis was used to analyze the correlation between the range of viable myocardium and scar myocardium and the level of cerebral glucose metabolism. Brain glucose metabolism determined by the mean of standardized uptake value (SUV(mean)) was analyzed by SPM. The ratio of SUV(mean) in whole brain and SUV(mean) in cerebellum were calculated, namely taget/background ratio (TBR). Differences in cerebral glucose metabolism among various groups were analyzed by SPM. Results: There were 101 males, and age was (57±10) years in this cohort. The extent of viable myocardium and the extent of scar, LVEF evaluated by SPECT/CT and PET/CT were significantly correlated with TBR (r=0.280, r=-0.329, r=0.188, r=0.215 respectively,all P<0.05). TBR value was significantly lower in viable myocardium<10% group, compared with viable myocardium 10%-<20% group (1.25±0.97 vs. 1.32±0.17, P<0.05) and viable myocardium≥20% group (1.25±0.97 vs. 1.34±0.16, P<0.05). Furthermore, in comparison with viable myocardium≥20% group, the hypo-metabolic regions of viable myocardium<10% group were located in the precuneus, frontal lobe, postcentral gyrus, parietal lobe, temporal lobe, and so on. Conclusions: There is a correlation between impaired left ventricular function and brain glucose metabolism in IHD patients. In IHD patients with low myocardial viability, the level of glucose metabolism in the whole brain is decreased, especially in the brain functional areas related to cognitive function.

Therapeutic observation of acupuncture plus navel acupuncture for urinary retention after radical hysterectomy for cervical cancer / 针灸推拿医学（英文版）

Objective: To observe the clinical efficacy of acupuncture plus navel acupuncture for patients with urinary retention after radical hysterectomy for cervical cancer. Methods: A total of 64 patients with urinary retention after radical hysterectomy for cervical cancer was divided into a navel acupuncture group (22 cases), an acupuncture group (18 cases) and an acupuncture plus navel acupuncture group (24 cases). All three groups received bladder function training and neuromuscular electrical stimulation. In addition, navel points were combined in the navel acupuncture group. Electroacupuncture was conducted to Qihai (CV 6), Zhongji (CV 3), Dahe (KI 12), Shuidao (ST 28), Ciliao (BL 32) and Huiyang (BL 35) in the acupuncture group. The acupuncture plus navel acupuncture group received both treatments. The catheter was removed after 3 d of treatment. Spontaneous urination, residual urine volume, urinary catheter dependence and recurrence after 3 d, 6 d and 9 d of treatment in each group were observed, respectively. Results: In the acupuncture plus navel acupuncture group, the markedly effective rates after 3 d, 6 d and 9 d of treatment were significantly higher than those in the navel acupuncture group and the acupuncture group; the urinary catheter dependence was lower than that of the other two groups, and the differences were statistically significant (P<0.05, P<0.01); the spontaneous urination time was shorter than that of the navel acupuncture group and the acupuncture group, and the differences were statistically significant (P<0.05, P<0.01); the residual urine volume was significantly less than that of the navel acupuncture group and the acupuncture group, and the differences were statistically significant (both P<0.01). After the catheter was removed, recurrence was observed from the next day after spontaneous urination was resumed. There were 2 cases of recurrence in the navel acupuncture group, 2 cases in the acupuncture group and 1 case in the acupuncture plus navel acupuncture group. The recurrence rate of the acupuncture plus navel acupuncture group was significantly lower than that of the navel acupuncture group and the acupuncture group (both P<0.01). Conclusion: Acupuncture plus navel acupuncture has satisfactory efficacy for urinary retention after radical hysterectomy for cervical cancer. It can significantly shorten the urinary retention time, reduce the patient's dependence on urinary catheter, and reduce the residual urine volume.

Influence of genetic polymorphisms in drug metabolism enzymes and transporters on pharmacokinetics of different fluvastatin formulations / 中国药理学与毒理学杂志

OBJECTIVE The purpose of the present study was to investigate the impact of fluvas-tatin formulation on the pharmacokinetics-genetic polymorphis relationship. METHODS We compared the difference between the pharmacokinetics of fluvastatin as an extended-release (ER) 80 mg tablet and an immediate-release(IR)40 mg capsule in terms of drug metabolism enzyme and transporter ge-netic polymorphisms. In this open-label, randomized, two-period, two-treatment, crossover study, ef-fects of BCRP, SLCO1B1, MDR1, CYP2C9, and CYP3A5 polymorphisms on the pharmacokinetics of fluvastatin were analyzed in 24 healthy individuals.Each treatment duration was 7 days with a washout period of 7 days between the crossover.Serum concentration of fluvastatin was evaluated using high-performance liquid chromatography-tandem mass spectrometry. RESULTS The SLCO1B1 T521C genotype had no statistically significant effect on IR 40 mg capsule of fluvastatinafter single or repeated doses.However,for the ER 80 mg tablet,the SLCO1B1 T521C genotype correlated with the AUC0-24of repeat doses (P=0.01). The CYP2C9*3 genotype correlated with the AUC0- 24after the first dose IR 40 mg capsule (P<0.05); however, the difference between CYP2C9*1/*1 and CYP2C9*1/*3 was not statistically significant after repeated doses. CONCLUSION The effect of SLCO1B1 T521C on fluvas-tatin exposure was observed and was more profound in ER and repeated dose administration than in IR and single dose administration.We recommend that formulation should be incorporated into future pharmacogenomics studies and clinical implication guidelines.

Risk factors for female pelvic organ prolapse and urinary incontinence / 中南大学学报(医学版)

To explore the risk factors for and the pathogenic mechanisms of pelvic organ prolapse and urinary incontinence.
 Methods: A total of 2 668 females who completed pelvic floor functional detection from July 2014 to October 2015 in the Physical Examination Center of the Third Xiangya Hospital of Central South University. The patients were divide into 4 groups: an urinary incontinence group, an organ prolapse group, an organ prolapse with urinary incontinence group, and a normal group. We compared the age, BMI, menopause, gravidity and parity, delivery pattern, the coordination of pelvic floor and abdominal muscles among the 4 groups.
 Results: There were statistical differences in age and BMI values among the 4 groups (P0.05). In the mode of delivery, there were statistical difference among the normal group and the other 3 groups (P0.05). Among the 4 groups, the normal group was the best one in coordination between pelvic floor and abdominal muscles, following by the organ prolapse group, the pelvic organ prolapse group and the urinary incontinence group.
 Conclusion: Aging, menopause, number of pregnancies and delivery, BMI, and mode of delivery all affect the occurrence of pelvic organ prolapse and urinary incontinence. Females with urinary incontinence or organ prolapse are not good in coordination between the pelvic floor and abdominal muscles.

Effect of ginsenoside Rg1 on senescence characteristics of leukemic stem cells / 局解手术学杂志

Objective To explore the effect of ginsenoside Rg1 on leukemia stem cells through comparing the biological senescence characteristics of HSCs in the patients with leukemia and healthy people,and provide new ideas and methods for leukemia prevention and treatment.Methods Fifteen cases of normal bone marrow in normal group and sixteen cases of chronic myeloid leukemia in leukemia group were divided into control group and Rg1 group,respectively.The control group used the conventional culture.The Rg1 group used the culture system with 10 μg/mL ginsenoside Rg1,other conditions were the same as control group.The bone marrow mononuclear cell of all groups were extracted after 2 days,and the CD34 +/CD38-cells population was isolated and purified by immunomagnetic adsorption cell sorting(MACS).The purity of the cells and cell cycles phase were detected by flow cytometry.Cell viability was detected by trypan blue staining.The percentage of positive cells was detected by SA-β-gal staining.CCK-8 detected the CD34 +/CD38-proliferation ability of each group.Results The ratio of CD34 +/CD38-cell population was (1.76 ± 0.34) ％ in every 1 × 106 BMNCs before sorting;the proportion of CD34 +/CD38-cell population per 1 × 106 cells after immunomagnetic sorting was (91.15 ± 2.41)％.The positive rate of SA-β-gal staining in human bone marrow CD34 +/CD38-cells of leukemia Rg1 group was significantly higher than that in leukemia control group,the difference was not significant (P ＞ 0.05);meanwhile there was no significant difference between normal control group and normal Rg1 group,but higher than that in leukemia control group,the difference was significant(P ＜ 0.05).CCK-8 results showed that the proliferation of CD34 +/CD38-cells was significantly increased in leukemia control group than those in the other groups.The survival rate of CD34 +/CD38-cells in human bone marrow was 99.1％ in all groups.Cell cycle phase results showed that the G1 arrest of CD34 +/CD38-cells in leukemia control group was significantly lower than those in the other three groups.Conclusion CD34 +/CD38-cells in chronic myeloid leukemia patients may be caused by some chronic myeloid leukemia.Ginsenoside Rg1 can effectively delay the process of aging.

Effect of sitagliptin on cardiomyocyte pyroptosis induced by type 2 diabe-tes mellitus and underlying mechanism / 中国病理生理杂志

AIM:To explore the effect of sitagliptin (SLT) on cardiomyocyte pyroptosis induced by type 2 dia-betes mellitus (T2DM) and the underlying mechanism. METHODS:The T2DM rat model was established by high-fat diet and intraperitoneal injection of streptozotocin (35 mg/kg). The model rats were treated with SLT at 3, 10 and 30 mg/kg and nicotinamide [NAM; an non-specific inhibitor of sirtuin (SIRT) family] at 500 mg/kg for 4 weeks. Fasting blood glu-cose was measured, and the tissue proteins were determined by the methods of Western blot and immunochemistry. RE-SULTS:Compared with control group, the pyroptosis of cardiomyocytes and NLRP3 expression were significantly induced, while the protein level of SIRT3 was downregulated by T2DM (P<0.05). SLT inhibited the pyrpotosis of diabetic rat car-diomyocytes, downregulated the expression of NLRP3, and upregulated the expression of SIRT3 in a dose-dependent man-ner (P<0.05). All the function of SLT (30 mg/kg) was reversed by the treatment with NAM (500 mg/kg). Compared with control group, the pyroptosis of cardiomyocytes and NLRP3 expression were significantly induced, while the protein level of SIRT3 was not regulated by NAM (500 mg/kg). CONCLUSION:SLT exerts the inhibitory effect on the pyropto-sis of cardiomyocytes induced by diabetes, and the mechanism is related to the SIRT3/NLRP3 signaling pathway.

Review of development about european clinical pharmacy and analysis of quality assessment system / 中国药学杂志

OBJECTIVE: To review the development of clinical pharmacy in Europe, analyze the quality assessment system and provide a reference for China. METHODS: By reviewing the literature of European hospital pharmacy or clinical pharmacy services from 1960 to 2013, sum up the development process of clinical pharmacy in Europe and analysis existing quality assessment system. RESULTS: European clinical pharmacy development can be divided into four parts; initial stage ("clinical pharmacy" introduced to hospital), exploring stage ("ward pharmacy service" mode), developing stage ("patient-centered" work system) and mature stage (improving "clinical pharmacists" evaluation system) ; It has formed quality assessment system of pharmacy service structure, process and outcome, but has not yet established a comprehensive system of evaluation criteria. CONCLUSION: Through analyzing and comparing the development progress and quality assessment system of European clinical pharmacy, it is useful to determine a clear direction of Chinese hospital pharmacy and to promote the establishment and improvement of Chinese quality evaluation system.

Risk factors of biliary complications after liver transplantation from donation after cardiac death / 浙江大学学报·医学版

<p><b>OBJECTIVE</b>To analyze the risk factors for biliary complications of liver transplantation from donation after cardiac death (DCD).</p><p><b>METHODS</b>Clinical data of 109 patients undergoing liver transplantation from DCD in First Affiliated Hospital of Zhejiang University School of Medicine from October 2010 to October 2013 were studied retrospectively. The risk factors of biliary complications following DCD liver transplantation were analyzed.</p><p><b>RESULTS</b>Twenty-four (22%) patients developed biliary complications after DCD liver transplantation. Univariate analysis showed that biliary complications were associated with warm ischemia time (P<0.001) and length of ICU stay (P=0.013), but not associated with ABO blood types match (P>0.05). Administration of inotropic agents and fatty liver increased the trend of biliary complications. Multivariate analysis demonstrated that warm ischemia time and length of ICU stay were independent risk factors for predicting biliary complications.</p><p><b>CONCLUSION</b>Warm ischemia time and days of ICU stay are independent risk factors for predicting biliary complications after DCD liver transplantation.</p>

The trabecular heterogeneity of femoral head in male osteoporotic fracture / 中华放射学杂志

Objective The aim of this study was to investigate the femoral head trabecular heterogeneity in Chinese male patients with osteoporotic fracture and their effects on osteoporotie fracture.Methods Human femoral heads were obtained from 11 male osteoporotie fracture (OP) patients ranged from 51 to 82 years old [average age (65±9 ) years old], and 7 male trauma ( TM ) patients ranged from 46 to 75 years old [average age (61±11 ) years old] who underwent total hip arthroplasty within two hours after either osteoporotic or trauma hip fracture.The OP was defined as having a fragility fracture.After laying femoral head as living body position and locating mark, nine trabecular specimens were obtained from femoral heads, each of 6 mm × 6 mm× 7 mm.The cortical shell was not included in each specimen.One cube was selected as the primary compressive trabecular region and the other 8 specimens as non-primary compressive trabecular region.These cubes were scanned using high-resolution microcomputed tomography scanner (μCT).After scanning, the data of total cubes, primary compressive trabecular region and noncompressive trabecular region were used for analysis by t test.Results In OP group volumetric bone mineral deosity(vBMD) [( 182.15±66.00) mg/mm3 vs (223.97±70.92) mg/mm3, t =3.041], tissue bone mineral density (tBMD) [(538.76±64.72) mg/mm3 vs (580.01±63.86 ) mg/mm3, t = 3.160],bone volume fraction (TV/BV) [(0.22 ± 0.06) % vs (0.26 ± 0.07 ) %, t = 2.821], trabecular thickness (Tb.Th.) [( 161.07 ±42.75 ) μm vs ( 205.47 ± 74.44 ) μm, t = 3.233] were significantly decreased while bone surface/bone volume ( BS/BV ) [( 13.75 ± 2.55 ) mm-1 vs ( 12.28 ± 2.70 ) mm-1, t =-2.777] was significantly increased in the non-primary compressive trabecular region than that in the primary compressive trabecular region ( P < 0.05 ).vBMD [( 182.15 ± 66.00) mg/mm3 vs ( 248.05 ±105.48) mg/mm3, t = - 3.598], tBMD [(538.76 ± 64.72) mg/mm3 vs ( 570.54 ± 100.32) mg/mm3,t=-2.108],TV/BV [(0.22±0.06) % vs (0.28±0.12) %, t= -3.466], Tb.Th.[(161.07±42.75) μm vs (200.31 ±96.63) μm, t= -2.866], trabecular number (Tb.N.)[(1.46±0.23)/mm3 vs ( 1.57 ± 0.29)/mm3, t = - 2.396] were significantly decreased while trabecular separation ( Tb.Sp.) [(780.82 ± 144.85 )μm vs ( 653.09 ± 119.64) μm, t = 5.470], degree of anisotropy (DA) ( 1.57±0.20 vs 1.47±0.18, t = 2.930 ) were significantly increased in OP than in TM in the non-compressive trabecular region( P < 0.05 ).No significant differents were found between OP and TM for any of the parameters measured in the primary compressive trabecular region.Tb.Th.[(199.37±68.22)μm vs (176.33 ±71.21 )μm, t = 2.060,P < 0.05] were significantly increased in the primary compressive trabecular region than that in the non-primary compressive trabecular region and no significant differences were found in the other parameters in the all 18 specimens.Conclusions The femoral head trabeculae had a heterogenic distribution in OP.Bone loss in OP primarily takes place in non-compressive trabecular region.Femoral neck fracture cannot be prevented though the bone microstructure do not loss in the primary compressive trabecular region.Tb.Th.in the femoral head could be an interesting parameter which is closely related to the femoral neck fracture.

Apoptosis induced by DNA primase inhibitor 3,3'-diethyl-9-methylthia-carbocyanine iodide in human leukemia HL-60 cells / 药学学报

<p><b>AIM</b>To investigate apoptosis induced by 3,3'-diethyl-9-methylthia-carbocyanine iodide (DMTCCI), an inhibitor of DNA primase found in our previous study, and the mechanism of DMTCCI in human myelogenous leukemia HL-60 cells.</p><p><b>METHODS</b>HL-60 cells were cultured in RPMI-1640 medium and treated with different concentrations of DMTCCI. MTT assay was used to detect growth inhibition. Flow cytometry and DNA ladders were used to detect apoptosis. Western blotting was used to observe the expression of survivin, Bcl-xL, Bad, Bax, Bcl-2, caspase-9, caspase-3, caspase-6, PARP, DFF45 and lamin B protein. Caspase-3 activity was measured by ApoAlert Caspase-3 Assay Kit.</p><p><b>RESULTS</b>DMTCCI inhibited proliferation of human leukemia HL-60 cells with IC50 value of 0.24 micromol x L(-1). The results of flow cytometry and DNA ladders showed that DMTCCI could induce apoptosis of HL-60 cells. The expression levels of protein survivin and Bcl-xL were down-regulated, Bad and Bax were up-regulated, while Bcl-2 protein had no change in response to DMTCCI treatment in HL-60 cells. Treatment of HL-60 cells with DMTCCI induced the proteolytic cleavage of caspase-9, caspase-3, caspase-6, PARP, DFF45 and lamin B protein. Caspase-3 activity apparently increased at 3 h and reached a peak at 12 h after exposure to 1 micromol x L(-1) of DMTCCI in HL-60 cells.</p><p><b>CONCLUSION</b>DMTCCI inhibited proliferation and induced apoptosis of human leukemia HL-60 cells. Bcl-2 family proteins, survivin and caspases family proteins might play a role in the apoptosis process induced by DMTCCI.</p>

Advances in Isobaric Tags for Relative and Absolute Quantitation Techniques Research / 中国生物工程杂志

Quantitative proteomics is a novel subject of proteomics research. There are several new techniques employed for the protein quantitative study. Isobaric tags for relative and absolute quantitation (iTRAQ) technology for protein quantitation using mass spectrometry is a recent powerful means of determining relative and absolute protein levels in up to four samples simultaneously. The iTRAQ reagent produced high quality, reproducible result in enriched complexes, organelles, and whole cell lysates. The status of the recent promising techniques and their possible future evolution were reviewed.

The value of antimitochondrial antibody and its subtypes in the diagnosis of primary biliary cirrhosis / 中华肝脏病杂志

<p><b>OBJECTIVE</b>A study on the value of antimitochondrial antibody (AMA) and its subtypes anti-M2, anti-M4, and anti-M9 in diagnosing primary biliary cirrhosis (PBC).</p><p><b>METHODS</b>Antimitochondrial antibody was detected by indirect immunofluorescence and anti-M2, anti-M4 and anti-M9 by Western blotting. AMA and anti-M2 of 78 PBC patients, of 35 non-PBC hepato-biliary disease patients and 20 healthy controls were studied and anti-M2, anti-M4 and anti-M9 were studied in 30 of the 78 PBC patients.</p><p><b>RESULTS</b>96.2% (75/78) of PBC patients were AMA positive and 94.9% (74/78) of PBC patients were anti-M2 positive. Only three among the 35 non-PBC patients were positive for AMA (one with very low titre). None of the 35 non-PBC patients was anti-M2 positive. AMA and anti-M2 were negative in all the healthy controls. Among the 30 anti-M2 positive patients, 16 patients were anti-M4 positive (16/30, 53.3%) and 4 patients were anti-M9 positive (4/30, 13.3%).</p><p><b>CONCLUSION</b>AMA and its subtypes (special anti-M2) are important sero-immunological markers for the diagnosis of PBC.</p>

Diisopropylamine dichloroacetate in the treatment of nonalcoholic fatty liver disease: a multicenter random double-blind controlled trial / 中华肝脏病杂志

<p><b>OBJECTIVE</b>To investigate the efficacy and safety of diisopropylamine dichloroacetate in the treatment of nonalcoholic fatty liver diseases (NAFLD).</p><p><b>METHODS</b>A randomized, double-blind, dose-paralleled control trial was carried out with NAFLD patients. The patients were randomly assigned to 2 groups treated with either a high dosage (120 mg/d) or a low dosage (60 mg/d) of diisopropylamine dichloroacetate for 8 weeks and the efficacy and safety of the drug were examined.</p><p><b>RESULTS</b>127 cases were recruited for the trial, 63 in the high dosage group, and 64 in the low dosage group. No case dropped out in the trial but four cases were eliminated (4/127, 3.1%). The final number in this trial was 123, with 61 in the high dosage group and 62 in the low dosage group. After 8 weeks of treatment, the overall improvement of clinical symptoms in the high dosage and in the low dosage group was 87.8% and 79.6%, respectively. ALT normalization was found in 55.7% and 69.4% of the cases in the two groups, serum lipids were lowered in 67.2% and 67.7% and ultrasound grading of the liver alteration severity was lowered in 51.7% and 43.5% in the two groups. The differences found between the two groups were of no statistical significance. One case from each group was found having an adverse drug reaction of dryness of the mouth (1.6%). No severe adverse drug reactions were found.</p><p><b>CONCLUSION</b>Diisopropylamine dichloroacetate could be used as a safe and effective drug in the treatment of nonalcoholic fatty liver diseases.</p>

Study on the prevalence rate of chronic obstructive pulmonary disease in northern part of Guangdong province / 中华流行病学杂志

<p><b>OBJECTIVE</b>To investigate the prevalence of chronic obstructive pulmonary disease (COPD) and its risk factors in population over 40 years old in northern part of Guangdong province.</p><p><b>METHODS</b>Using uniform scheme, procedures and questionnaire, a cluster-randomized-sampling survey for the population aged over 40 years in a rural area of Shaoguan in the northern part of Guangdong province was performed. Spirometry was performed for every participant, followed by a bronchodilatation test when bronchial obstruction was present.</p><p><b>RESULTS</b>There were 1468 cases with complete data from 1498 people aged >or= 40 years including 640 males, 828 females with an average age of 54.3 years old. The total prevalence of COPD was 12.0%. The prevalence of COPD in males was significantly higher than that in females (18.3% vs. 7.1%, P < 0.01). Only 80.7% of the patients with COPD presented one or more symptoms as cough, phlegm, or dyspnoea. Underdiagnosis of COPD would be quite serious. Only 26.1% of the cases was previously diagnosed to have chronic bronchitis, emphysema, or COPD. Smoking was an important risk factor to COPD and 78.4% of the patients with COPD were smokers. However, relation of biomass and COPD called for further investigation.</p><p><b>CONCLUSION</b>Prevalence of COPD was much higher than expected in the northern part of Guangdong while smoking was an most important risk factor of COPD. Lung function test seemed to be of great importance to COPD diagnosis, especially in the earlier period of COPD.</p>

Effects of ribozyme targeting platelet-derived growth factor receptor beta subunit gene on the proliferation and apoptosis of hepatic stellate cells in vitro / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>Activation and proliferation of hepatic stellate cells (HSC) is essentially involved in the development and progression of hepatic fibrosis. The most potent growth factor for HSC is platelet-derived growth factor receptor (PDGF) and PDGF receptor beta subunit (PDGFR-beta) is the predominant signal transduction pathway of PDGF which is overexpressed in activated HSC. This study investigated the cleavage activity of hammerhead ribozyme targeting PDGFR-beta mRNA in HSC and the effect on biological characteristics of HSC.</p><p><b>METHODS</b>Expression vector of anti-PDGFR-beta ribozyme was constructed and transfected into rat activated HSC with lipofectamin. The positive cell clones were gained by G418 selection. The expression of PDGFR-beta, alpha-smooth muscle actin, and typeI and type III collagen were detected by using Northern blot, Western blot and immunocytochemical staining, respectively. The cell proliferation was determined with MTT colorimetric assay. The cell apoptosis was analyzed by using flow cytometry, acridine orange fluorescence vital staining and transmission electron microscopy.</p><p><b>RESULTS</b>The expression of PDGFR-beta at mRNA and protein level was markedly reduced in ribozyme-transfected HSC by 49% - 57% (P < 0.05 - 0.01). The proliferation and alpha-smooth muscle actin expression of ribozyme-transfected HSC were significantly decreased (P < 0.05 - 0.01), and the type I and type III collagen synthesis were also reduced (P < 0.01). In addition, the proliferative response of ribozyme-transfected HSC to PDGF BB was significantly inhibited. Otherwise, the apoptotic cells were significantly increased in ribozyme-transfected HSC (P < 0.01), and typical apoptotic cells could be found under transmission electron microscopy.</p><p><b>CONCLUSIONS</b>The anti-PDGFR-beta ribozyme effectively cleaved the target RNA and significantly inhibited its expression, which blocked the signal transduction of PDGF at receptor level, inhibited HSC proliferation and collagen synthesis, and induced HSC apoptosis. These results suggest that inhibiting PDGFR-beta expression of HSC may be a new target for the therapy of liver fibrogenesis, and ribozyme may be a useful tool for inhibiting PDGFR-beta expression.</p>

Inhibition of proliferation of hepatic stellate cells by taurine is mediated via regulating cell cycle proteins / 中华肝脏病杂志

<p><b>OBJECTIVE</b>To explore the possible mechanism(s) of taurine-inhibiting the proliferation of hepatic stellate cells (HSC), this study investigated the effect of taurine on the HSC cell cycle and its regulatory protein expression.</p><p><b>METHODS</b>Cell proliferation was assessed by MTT assay. Cell cycle was analyzed by flow cytometry. Cell cycle regulatory protein Cyclin D1 and P21waf1 expression were determined by immunocytochemistry and image-analysis system, and real-time quantitative PCR.</p><p><b>RESULTS</b>HSC proliferation was markedly inhibited when HSC were treated with taurine at concentrations of 5, 10, 20, 30, 40 and 50 mmol/L for 48 hours, and the inhibition rates were 6.7%, 14.4%, 23.3%, 32.2%, 36.7% and 45.6% respectively (P < 0.05-0.01). In the flow cytometry analysis, it was found that taurine could block HSC in the G0/G1 phase from entering the S phase, resulting in more cells in the G0/G1 phase and fewer in the S phase. The percentage of the cells in the G0/G1 phase and the S phase at the dosage of 40 mmol/L were 68.2%+/-1.4% and 26.2+/-1.3% respectively, which was significantly different in comparison to the controls (56.2%+/-1.7% and 38.5%+/-0.8% respectively, P < 0.01). HSC expressed cyclin D1 and P21waf1. Taurine inhibited cyclin D1 expression and induced P21waf1 expression. The cyclin D1 protein and mRNA in the HSC treated with 40 mmol/L taurine were significantly reduced compared with the controls [protein (optical density value): 0.13+/-0.02 versus 0.18+/-0.02, P < 0.01; mRNA: 5776.7+/-3345.0 versus 18,400.6+/-1374.8 copies/10(6) GAPDH, P < 0.01]; and the P21waf1 protein and mRNA were markedly increased compared with the controls [protein (optical density value): 0.19+/-0.02 versus 0.14+/-0.01, P < 0.01; mRNA: 44,866.7+/-3910.7 versus 16,933.3+/-960.9 copies/10(6) GAPDH, P less than 0.05].</p><p><b>CONCLUSIONS</b>Cyclin D1 and P21waf1 were cell cycle regulatory proteins in HSC, and taurine can inhibit the HSC cyclin D1 expression and stimulate P21waf1 expression, facilitate arresting cells in G0/G1 phase, and suppress cell proliferation.</p>