1.The value of MCV,MCH in the screening of thalassemia
Dongwei LIANG ; Rongchuan LI ; Jian HE ; Zhenhong ZHANG ; Weiming ZHENG
International Journal of Laboratory Medicine 2014;(8):960-961
Objective To evaluate the value of the tests of mean corpuscular volume (MCV ) ,mean corpuscular hemoglobin (MCH) in the screening of thalassemia .Methods 603 cases were performed MCV and MCH tests and gene detection of thalasse-mia .The results of gene detection were used as reference standard .The sensitivity ,specificity ,accuracy ,positive predictive value and negative predictive value of single or combined results of MCV ,MCH tests were calculated .Results The sensitivity and specificity of single MCV test were 91 .2% and 76 .1% ,single MCH test were 91 .2% and 70 .7% .The sensitivity and specificity of parallel combined tests of MCV and MCH were 94 .8% and 61 .4% ,serial combined tests of MCV and MCH were 88 .4% and 75 .6% .Con-clusion The sensitivity of single MCV or MCH test in the screening of thalassemia is high .Parallel combined tests of MCV and MCH can improve the sensitivity ,and will be widely used in the in the screening of thalassemia .
2.Left atrial function and left atrial-left ventricular coupling assessed by vector flow mapping and two-dimensional tissue tracking echocardiography in patients with type 2 diabetes mellitus
Yi WANG ; Rongchuan MA ; Geqi DING ; Mei ZHANG ; Lixue YIN
Chinese Journal of Ultrasonography 2017;26(2):103-109
Objective To detect left atrial (LA) function and left ventricular (LV)-LA coupling using vector flow mapping (VFM) and two-dimensional tissue tracking (2DTT) echocardiography in patients with diabetes.Methods A total of 51 patients with type 2 diabetes (DM group) and 38 healthy volunteers (control group) were studied.LA and LV strain were assessed by 2DTT.The energy loss (EL) of LA and LV during ventricular systole (ELs),early diastole (ELed),and atrial contraction (ELac) were measured by VFM.Results LVEL in DM group was significantly increased compared to that in control group (P<0.05).LAELs and LAELed in control group were higher than those in DM group (P<0.05);while LAELac decreased in control group (P<0.05).Multivariate regression analysis identified E and LVELed as independent predictors of LAELed;Peak torsion,LA peak systolic strain and LVELac were independent predictors of LAELac.Conclusions The reservoir and conduit function of LA are impaired in patients with DM,while the pump function increases as a compensation.Abnormal LA-LV coupling also appears in patients with DM.
3.Cryopreservation of rat liver in self-prepared PV solution: Compared with UW solution
Gang LUO ; Dilai LUO ; Xiaozheng LI ; Rongchuan ZHANG ; Dongliang ZHU
Chinese Journal of Tissue Engineering Research 2010;14(18):3235-3238
BACKGROUND: At present, many scholars make improvements to the UW solution composition, aiming to further explore the principle of organ preservation, improve preservation techniques and to extend the preservation time limit; simplified composition of UW solution can further meet the clinical transport, storage and ease of use; suitable alternatives should be found to reduce the cost of UW solution to satisfy the needs of the market.OBJECTIVE: To discuss the effectiveness of self-prepared PV solution for preserving rat's liver at a lower temperature, and to compare the results with UW solution.METHODS: A total of 90 Wistar rats were randomly divided into three groups: UW group, PV group and normal saline (NS) group. Rats in each group were prepared for non-circulated isolated perfused rat liver models, and preserved for 0, 6,12, 18, and 24 hours respectively, with 6 animals in each subgroup. The changes of hepatic enzymology (alanine aminotransferase, aspartate aminotransferase and lactate dehydrogenase) in corresponding time period, amount of metabolic production of oxyradicals from perfusion effluent liquid, and the bile secretion and changes in hepatic morphology under the microscope were observed. RESULTS AND CONCLUSION: Amounts of alanine aminotransferase, aspartate aminotransferase and lactate dehydrogenase and superoxide dismutase in perfusion effluent liquid were close between the PV group and UW group, and the difference was not significant (P > 0.05). After 6 hours of preservation, tumor necrosis factor a titre in the PV fluid group was greater than that in the UW group (P< 0.05); after 12 hours of preservation, amount of malonaldehyde in the UW group was evidently increased than that in the PV group (P < 0.05); after 18 hours of preservation, bile secretion in the PV group was lower than that in the UW group (P < 0.05); morphological changes of hepatic cells were similar in the two groups under the optical and electron microscope. The results demonstrated that PV solution and UW solution have a similar effect on protecting Wistar rat's liver function, and PV solution is superior to UW solution in antioxidation and scavenging oxygen free radicals.
4.Protective effect of metoprolol on ischemia-reperfusion induced myocardial tissue injury in mice
Haiyan CHEN ; Houxiang HU ; Jiqian XU ; Lei XU ; Shuang ZHANG ; Huan WANG ; Rongyi ZHANG ; Rongchuan YUE ; Tao LUO
Chongqing Medicine 2016;(3):317-319
Objective To investigate the possible mechanism of metoprolol on protecting against ischemia‐reperfusion in‐duced injury .Methods A total of 32 healthy 3-4 months male C57BL/6 mice were divided into four groups(n=8)as following :Sham‐operating group(control group);metoprolol group;ischemia‐reperfusion group(I/R group);metoprolol + I/R group .Myo‐cardial injury ,apoptosis ,cytochrome c release ,Caspase‐3 activity and calpain activity were determined in these groups .Results Al‐though there was no obvious changes in the regions at risk between I/R group and metoprolol + I/R group ,metoprolol pretreat‐ment significantly reduced the ratio of the infarct to risk regions(P<0 .05) .In the I/R group ,the rate of cardiomyocyte apoptosis , cytochrome c release ,as well as the activity of Caspase‐3 and calpain significantly increased compared to the control group(P<0 .01) .However ,these effects of I/R injury were alleviated by pretreatment with metoprolol .Conclusion metoprolol might protect against ischemia‐reperfusion induced injury by preventing calpain activation .
5. Salvianolate protects H9c2 cells from hypoxia/reoxygenation injury-induced apoptosis by attenuating mitochondrial DNA oxidative damage
Rongchuan YUE ; Xiaoli YANG ; Rongyi ZHANG ; Si LIU ; Jie LIU ; Jing ZENG ; Hao LIANG ; Wei WANG ; Houxiang HU ; Chunyu ZENG
Chinese Journal of Cardiology 2017;45(1):57-63
Objective:
To investigate the possible mechanism related to the protective effects of salvianolate in H9c2 cells underwent hypoxia/reoxygenation (H/R)-injury.
Methods:
H9c2 cells were divided into four groups: control group, salvianolate group (S group), H/R group, and salvianolate+ H/R group(S+ H/R group), in which the H9c2 cells were pretreated with salvianolate before H/R-treatment.Apoptotic cells were detected by Tunel assays and AnnexinⅤ-FITC apoptosis detection kit.The intracellular ATP level, the change of mitochondrial membrane potential and the mitochondrial DNA oxidative damage were also determined in these groups.
Results:
(1) The apoptosis rate of H/R group(26.36±5.14)% was significantly higher compared to control group(2.71±1.66)%(
6. The effects and related mechanism of salvianolate on rats with myocardial ischemia-reperfusion injury
Rongchuan YUE ; Xiaoli YANG ; Rongyi ZHANG ; Si LIU ; Jie LIU ; Jing ZENG ; Hao LIANG ; Wei WANG ; Houxiang HU ; Chunyu ZENG
Chinese Journal of Cardiology 2017;45(12):1072-1077
Objective:
To investigate the effect and related mechanism of salvianolate on myocardial ischemia-reperfusion (I/R) injury in rats.
Methods:
Thirty-six adult Sprague-Dawley rats were divided into three groups (