Progress in the pathogenesis and genotype-phenotype of Angelman syndrome / 中华实用儿科临床杂志

Angelman syndrome (AS) is a neurodevelopmental disorder characterized by severe developmental delay, intellectual disability, exuberant behavior with happy demeanor, speech impairment, and epileptic seizures.The loss of UBE3A allele on maternal chromosome 15q11-13 is the main cause of AS.However, the pathogenesis and genotype-phenotype of AS is not yet clear.This study aims to review the research progress of AS.

A survey in compassion fatigue and the related factors of ICU nurses in Beijing′s two tertiary hospitals / 中国实用护理杂志

Objective To investigate the compassion fatigue status and its related factors of ICU nurses in two tertiary hospitals in Beijing, providing a theoretical basis for further intervention. Methods This survey was conducted on 294 ICU nurses in two tertiary hospitals in Beijing using general information questionnaire and compassion fatigue scale. Results Nearly 62.86％(176/280) of ICU nurses had compassion fatigue, and the overall average score was 2.68. Among all the dimensions, the higher were 2.77 ± 0.72 of "loss of enthusiasm", 2.77 ± 0.52 of "feeling indifference" and 2.75 ± 0.67 of"ability doubt". The education degree, marital status and post were the main influencing factors of compassion fatigue. And the pressure from patients and their families were the main reasons of compassion fatigue of the nurses. Conclusions There is compassion fatigue among ICU nurses in two hospitals in Beijing, it is suggested that nursing managers should avoid the impact of sympathetic factors from the management point of view, reducing ICU nurses sympathy fatigue.

Research progress of Middle East Respiratory Syndrome-Coronavirus (MERS-CoV) / 中国人兽共患病学报

Middle East Respiratory Syndrome-Coronavirus (MERS-CoV) is a novel coronavirus which can cause severe acute respiratory illness with a high mortality rate .There is no proven medication or vaccine for MERS-CoV .Currently MERS-CoV has spread from the main epidemic area ,the Middle East area ,to many other countries including United States of America and has the potential of global endemic .It has raised global public health concerns regarding the current situation and its future evolution .This review will mainly focus on the research progress of MERS-CoV about the animal reservoir and transmission , infection mechanisms and development of anti-viral drugs or vaccine .The goal is to provide with useful references to the devel-opment of specific drug and vaccine and an effective control and prevention of M ERS-CoV infection .

Comparison of ATP and thrombin-induced Ca2+ entry in vascular endothelial cells / 中国药理学与毒理学杂志

The effects of drugs on intracellular calcium concentration(［Ca2+］i) were investigated with fura-2 fluorescence technique to investigate ATP and thrombin-induced Ca2+ entry in bovine aortic endothelial cells(BAEC). It was found that application of ATP and thrombin gave rise to biphasic ［Ca2+］i elevation. ATP or thrombin only triggered a fraction of cyclopiazonic acid(CPA)-sensitive Ca2+ store, which was enough to activate Ca2+ entry. The Ca2+ release induced by thrombin resulted from the activation of phospholipase C(PLC), whereas the PLC-independent mechanism was involved in ATP-induced Ca2+ release. Nifedipine had no effect on ATP and thrombin- induced Ca2+ entry. SK&F 96365 and ginsenoside-2A inhibited both ATP and CPA-induced Ca2+ entry, however no effect of them on thrombin-induced Ca2+ entry was found. The inhibitory effects of SK&F 96365 and ginsenoside-2A on CPA-induced Ca2+ entry were less than that on ATP-induced Ca2+ entry. The Ca2+ influx sensitive to SK&F 96365 was not the same as that to ginsenoside-2A. These observations suggest that both ATP and thrombin evoke Ca2+ release and Ca2+ influx by activation of different receptor. However their mechanisms appear different.

Effects of chloride channels blockers on Ca~(2+)influx induced by adrenoline in A10 cells / 中国临床药理学与治疗学

AIM: To investigate the relationship between chloride channels and the Ca 2+influx induced by adrendine(Adr). METHODS: The effects of drugs on Adr-induced Ca 2+influx were investigated with Fura-2 fluorescence technique. RESULTS: Adr-induced Ca 2+influx was inhibited by nifedipine,SK&F96365,NFA and furosemide in a concentration manner respectively; Ca 2+influx could be further inhibited by NFA or furosemide after the maximal inhibition by SK&F96365;SK&F96365 also could further inhibit the Ca 2+influx which had been inhibited by NFA or furosemide. Genistein and vanadate could reduce or increase the Ca 2+influx respectively. CONCLUSION: Ca 2+influx induced by Adr is related to VDC and ROC, and chloride channels involves in the processes.The levels of tyrosine phosphoralation affect the Ca 2+influx.

Effect of captopril and betaloc on the changes in expression of MHC of left ventricle in hypertensive rats / 中国病理生理杂志

AIM:To investigate myosin heavy chain(MHC)gene expression and the effects of captopril and betaloc at an early stage of hypertension. METHODS:Model of hypertension was made by partly narrowing two bilateral renal arteries(2K2C). The rats were divided into four groups at random. (1) control group; (2)2K2C group;(3)captopril group;(4)betaloc group.Levels of ?-MHC and ?-MHC mRNA were determined by dot-blot. RESULTS:?-MHC mRNA expression were gradual1y reduced in 2K2C group,while ?-MHC mRNA expression were increased,and the marked changes were observed at 72h postoperation. Captopril could inhibit the changes in MHC gene expression; but betaloc could not. CONCLUSION: The expression of MHC gene has changed at an early stage of renal hypertensive rat,and renin-angiotensin system may play an important role in this change.

Effects of Cl~-channels blockers on Ca~(2+) influx induced by ?_1-adrenoceptor subtypes / 中国药理学通报

AIM To investigate the roles of Cl- channels in Ca2+ influx induced by activaion of al- adrenoceptor subtypes in transfected-CHO cells. METHODS The effects of drugs on ?1A、?1B and ?1D- AR-induced Ca2+ influx were investigated with Fura2 fluorescence technique. RESULTS The ?1A-AR- induced Ca2+ influx was inhibited by furosemide(2 .5 ~ 10 M?mol?L- 1 )and SK&F96365(5- 15 ?mol?L- 1 ) in a concentration- dependent manner respectively; The ?1B-AR-induced Ca2+ influx could also be inhibit inhibited by NFA(2. 5 ~ 10 ?mol? L-1 ), whereas the alD AR-induced Ca2+ influx was only suppressed by NFA. In ?1B-CHO cells, Adr-triggered Ca2+ influx could be further inhibited by NFA or furosemide after the maximal inhibition by SK&F96365;SK&F96365 could further inhibit Ca2+ influx which had been inhibited by NFA or furosemide. In ?1A-CHO cells, Adr-triggered Ca2+ influx could be further inhibited by SK&F96365 after had been inhibited by furosemide; furosemide could not further inhibite Ca2+ influx which had been inhibited by S&F96365. CONCLUSION There are different characteristics of CI- channels related to ?1A、 ?1B and ?1D-AR-induced Ca2+ influx.