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Objective:To observe the clinical features of retinopathy of prematurity (ROP) in multiple fetuses.Methods:Retrospective clinical study. From December 2009 to June 2018, 758 premature or low-weight multiple fetuses (multiple fetuses group) and 2363 simultaneous single fetuses (single fetuses group) who were admitted to the Department of Ophthalmology and Neonatal Department of Dongguan People’s Hospital and underwent ROP screening were included in the study. Among the multiple pregnancy group, there were 735 twins and 23 triplets; 441 males and 317 females. The mean gestational age was 32.22±2.14 weeks, and the mean body weight was 1.69±0.43 kg. There were 202 of natural births and 556 of cesarean sections. A total of 750 cases have a history of oxygen. Among the singleton group, 1421 were males and 942 were females. The mean gestational age was 32.06±2.52 weeks, and the mean body weight was 1.70±0.46 kg. There were 1146 of natural births and 1217 of cesarean sections. A total of 2333 cases have a history of oxygen. The detection rate of multiple ROP, gestational age, birth weight, sex composition ratio, mode of birth, time of first ROP diagnosis, and severity of ROP were observed. χ2 test was used to compare the rate between groups, and t test was used to compare the mean between groups. Results:Among the multiple pregnancy group, there were 68 cases (8.97%) of ROP. Among them, 64 twins (8.71%, 64/735), 4 triplets (17.39%, 4/23). Among the singleton group, there were 187 cases (7.91%) of ROP. With the increase of fetal number, the detection rate of ROP increased, but there was no significant difference ( χ2=3.097, P=0.213). There was no significant difference in the detection rate of ROP between multiple fetuses and single fetuses ( χ2=0.855, P=0.355). There was no significant difference in sex ratio ( χ2=0.069), mode of production ( χ2=1.900), birth weight ( t=0.139), gestational age ( t=-0.478), and time of first ROP diagnosis ( t=0.371) between ROP cases of multiple fetuses and single fetuses ( P=0.793, 0.168, 0.889, 0.633, 0.371). There was no significant difference in the constituent ratio of severity of ROP lesions between multiple fetuses and single fetuses ( χ2=3.003, P=0.223). Conclusion:There is no significant difference in ROP incidence, gestational age, birth weight, diagnosis time and severity of ROP between multiple fetuses and single fetuses under the same conditions.
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Objective:To investigate the effects of miRNA-499a-5p targeting CD38 on cardiomyocyte injury induced by hydrogen peroxide (H 2O 2) and the possible mechanism. Methods:H9c2 cardiomyocytes were cultured in vitro and induced with H 2O 2 to establish the cardiomyocyte injury model. Four groups including control, H 2O 2, H 2O 2+ negative control (NC) and H 2O 2+ miRNA-499a-5p groups were set up. Real-time quantitative PCR (RT-qPCR) and Western blot were used to detect the expression of miRNA-499a-5p and CD38 in cardiomyocytes, respectively. MTT assay was used to measure the survival rates of cardiomyocytes. The levels of reactive oxygen species (ROS) and the activity of lactate dehydrogenase (LDH) were analyzed with test kits. Annexin V-FITC/PI double staining method was used to detect the apoptosis rates of cardiomyocytes. Western blot was used to detect the expression of B-cell lymphoma/leukemia-2 (Bcl-2), Bcl-2-related X protein (Bax), phosphoinositide 3-kinase (PI3K), phosphorylated PI3K (p-PI3K), protein kinase B (Akt) and phosphorylated Akt (p-Akt). Dual luciferase reporter assay was used to detect the targeting relationship between miRNA-499a-5p and CD38. Results:Compared with the control group, the expression of miRNA-499a-5p, Bcl-2, p-PI3K and p-Akt and the survival rate of cardiomyocytes were significantly reduced in the H 2O 2 group ( P<0.05), while the expression of CD38 and Bax, ROS level, LDH activity and the apoptosis rate were significantly increased ( P<0.05). Compared with the H 2O 2 group, the expression of miRNA-499a-5p, Bcl-2, p-PI3K and p-Akt and the survival rate of cardiomyocytes were significantly increased in the H 2O 2+ miRNA-499a-5p group ( P<0.05), while the expression of CD38 and Bax, ROS level, LDH activity and the apoptosis rate were significantly decreased ( P<0.05). Dual luciferase reporter assay confirmed that CD38 was a target gene of miRNA-499a-5p. Conclusions:miRNA-499a-5p could alleviate H 2O 2-induced cardiomyocyte injury by inhibiting the expression of CD38 and the PI3K/Akt signaling pathway might be involved.
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Objective@#To investigate the effects of miR-27b targeting ten-eleven translocation methylcytosine dioxygenase 2 (TET2) on oxidized low-density lipoprotein (ox-LDL) induced inflammatory responses and apoptosis in endothelial cells.@*Methods@#Double luciferase reporter gene analysis verified the targeting effect of miR-27b on TET2. Human umbilical vein endothelial cells (HUVECs) were induced by ox-LDL in vitro. Eight groups were set up including control group, ox-LDL group, ox-LDL+ anti-miR-con group, ox-LDL+ anti-miR-27b group, ox-LDL+ pcDNA group, ox-LDL+ pcDNA-TET2 group, anti-miR-27b+ si-con group and anti-miR-27b+ si-TET2 group. qRT-PCR was used to detect the expression of miR-27b and TET2 at mRNA level. Cell viability was detected by MTT assay. Cell apoptosis rate was detected by flow cytometry. Western blot was used to detect the expression of TET2, Cyclin D1 and caspase-3 at protein level.@*Results@#TET2 was the target gene of miR-27b. TET2 expression could be negatively regulated by miR-27b. ox-LDL increased the expression of miR-27b and reduced the expression of TET2 in HUVECs. The secretion of inflammatory factors and apoptosis rates of HUVECs in the control, ox-LDL+ anti-miR-27b, ox-LDL+ pcDNA-TET2 and anti-miR-27b+ si-con groups were significantly lower than those in the ox-LDL, ox-LDL+ anti-miR-con, ox-LDL+ pcDNA and anti-miR-27b+ si-TET2 groups, respectively (P<0.05).@*Conclusions@#miR-27b promoted ox-LDL-induced inflammatory responses and apoptosis in endothelial cells through down-regulating the expression of TET2.
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Objective To study the cognitive tendencies in recognizing negative emotional faces.Methods The experiment used the traditional flanker paradigm for reference.Forty-eight university students (19 males,29 females) finished the flanker tasks deigned by E-Prime, and their accuracy rate and reaction time were recorded in the study.Results ANOVA revealed that,in all cases,the accuracy rate of anger was significant higher than fear and sadness (96.60% ,94.50% ,94.40% ) (P＜0.05).And when the flanking stimuli were fear faces or there were no flanking stimuli, the reaction time of anger was much shorter than fear and sadness ( respectively,fear(801.27 ± 140.99) ms,anger(723.94 ± 151.37 ) ms, sadness(812.21 ± 148.85 ) ms; fear(788.17 ±148.81 ) ms, anger ( 694.28 ± 111.99 ) ms, sadness (763.57 ± 133.91 ) ms, P ＜ 0.05 ).When the flanking stimuli were anger or sadness faces, the reaction time of anger was significant shorter than fear( respectively, fear( 824.09 ± 164.42) ms, anger (721.48 ± 124.06 ) ms, sadness ( 760.50 ± 131.12 ) ms; fear ( 798.95 ± 146.40) ms, anger (702.55 ± 136.07 ) ms, sadness (750.48 ± 133.86) ms, P ＜ 0.05).Conclusion There are no flanker effects in recognizing different negative emotional faces, but there are anger superiority effects of face recognition and cognitive tendencies, which is helpful for clinical diagnosis and treatment of some diseases associated with emotional disorders.
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Objective To observe the changes of VEGF and Ang-2 expression in streptozotocin(STZ)-induced diabetic rat retina after insulin therapy and explore possible roles of insulin in the development of diabetic retinopathy. Methods Diabetes was induced in 8-week-old male wistar rats by a single intraperitoneal injection of STZ. After three weeks,animals were randomly divided into four groups:(1)diabetic rats received intensive insulin therapy for 20 days;(2)diabetic rats received unregular insulin therapy,which caused the abrupt fluctuation of glycemic level;(3)diabetic control rats; and (4)normal control rats. After treatment,the animals were sacrificed with an overdose of anesthesia,and the eyes were enucleated and fixed in 4% paraformaldehyde immediately. Paraffin sections of retina were prepared.Expression of VEGF and Ang-2 was assessed by immunofluorescence stain and images analysis. Results Quantitative analysis showed VEGF and Ang-2 protein expression was increased by 2.38-fold and 2.41-fold in diabetic rats retinas as compared to non-diabetic rats retinas respectively (P0.05). Conclusion Intensive insulin therapy could decrease VEGF and Ang-2 expression in retina and has protective effect on diabetic retinopathy in STZ-diabetic rats.