Objective To observe the effects of mirtazapine to improve the life quality of malignant tumor patients with moderate or severe depres-sion. Methods Patients with mood disorders screened by the physician were then graded by the Hamilton Depression Scale(HAMD)under the tu-telage of ward psychological consultant. Fifty patients with moderate or severe depression were selected by psychological doctors and recruited for the study. After obtaining consent,the patients received 15-60 mg/d mirtazapine every night for 9 weeks. According to the Quality of Life Rating Scale (QOL),the scores of these patients were evaluated at the pretreatment,the 3rd week and the 9th week of the post-treatment. Then,the life quality conditions before and after treatment were revaluated. Results The scores of HAMD were 33.16±7.25,28.74±6.24,and 22.58±6.71 at the pretreat-ment,the 3rd week and the 9th week of the post-treatment,respectively. There were significantly different among the HAMD scores at the pretreat-ment,the 3rd week and the 9th week of the post-treatment.(F=30.99,P<0.01). The scores of HAMD were improved significantly between the pre-treatment and the 3rd week of the post-treatment(P<0.05). The scores of HAMD were also improved significantly between the 3rd week and the 9th week of the post-treatment(P<0.05). After treatment by mirtazapine,the appetite,spirit,sleep,fatigue,pain,the reorganization of cancer,the attitude towards treatment,the side effect of treatment and the facial expression were significantly improved(P<0.01). Conclusion Mirtazapine could improve the life quality of malignant tumor patients with moderate or severe depression.

Objective To identify the transcriptional start site and clone a novel transcript variant of MYCT1(Myc target 1)for further study of its structure and function. Methods Transcriptional start site was confirmed using MYCT1 conserved sequence by 5′-RACE method and a novel MYCT1 isoform was cloned by splicing with 3′-RACE PCR product. Then,the cDNA or amino acid sequence between MYCT1 and its isoform was compared using bioinformatics server. Finally,the expression profile of this novel transcript in different cell lines was detected through RT-PCR. Re-sults A 1 106 bp transcript named MYCT1-TV(Myc target 1 transcript variant 1)was successfully cloned,and its transcriptional start site was confirmed which located at 140 bp upstream of the ATG start codon of MYCT1-TV. MYCT1-TV shows no obviously structural difference with MYCT1 and is widely expressed in various cell lines. Conclusion The transcriptional start site analysis and MYCT1-TV cloning provide an experi-mental basis for the further exploration and understanding of the function and the transcriptional regulation mechanism of MYCT1.

Objective To evaluate microdeletion of DAZ gene on the Y chromosome in patients suffering from idiopathic azoospermia or severe oligozoospermia.Methods The four sites including SY154,SY155,SY254,SY255 and SRY regions of Y chromosome in 38 cases of idiopathic azoospermia and severe oligozoospermia were detected by STS-PCR.Results Six cases of microdeletion of DAZ genes were found in 38 patiens,microdeletion rate was 15.8%.Five cases from 30 patiens suffering from idiopathic azoospermia,microdeletion rate was 16.7%.One case from 8 patients suffering from severe oligozoospermia had microdeletion.The microdeletion rate was 12.5%.Conclusions The microdeletion of DAZ gene is a major cause of idiopathic azoospermia and severe oligozoospermia leading to male infertility.Therefore,DAZ gene should be detected and PGD should be done prior to ICSI for the patients suffering from idiopathic azoospermia and severe oligozoospermia.

Objective To evaluate the effects of dexmedetomidine on the hemodynamics and the heart rate variability(HRV)in patients under-going lower limbs operations with application of tourniquet. Methods Forty patients undergoing lower limbs operations with application of tourni-quet were randomized assigned to dexmedetomidine group(group D,n=20)or control group(group C,n=20). After combined spinal-epidural anesthesia,group D received a continuous infusion of dexmedetomidine(0.5μg/kg for 10 min for loading dose and followed by 0.2μg·kg-1·h-1) until tourniquet deflation. The control group received normal saline instead. Mean arterial pressure(MAP),heart rate(HR),saturation of pulse ox-imetry(SpO2),low frequency power(LF),high frequency power(HF)and LF to HF ratio(LF/HF)were recorded at regular time points:imme-diately before loading dose(T0),before tourniquet inflation(T1),15 min after tourniquet inflation(T2),30 min after tourniquet inflation(T3),45 min after tourniquet inflation(T4),60 min after tourniquet inflation(T5),1 min after tourniquet deflation(T6),5 min after tourniquet deflation (T7)and 10 min after tourniquet deflation(T8). Results Compared with T0,the MAP of group D significantly decreased at T6-T8(P<0.05). Compared with T0 and T1,the MAP of group C increased at T2-T5(P>0.05). Compared with T2-T5,the MAP of group C significantly decreased at T6(P<0.05). Compared with group C,the MAP of group D significantly decreased at T6 and T7(P<0.05). Compared with T0,the HR of group D significantly decreased at T1-T8(P<0.05). Compared with T0,the HR of group C had no significant change at T1-T5(P<0.05). Compared with T1-T5,the HR of group D and group C significantly increased at T6(P<0.05). Compared with group C,the HR of group D significantly decreased at T1-T4 and T6(P<0.05). Compared with T0,the SpO2 of group D and group C significantly decreased at T6(P<0.05). Compared with group C,the SpO2 of group D significantly decreased at T1-T3(P<0.05). Compared with T6,LF of group D and group C significantly increased at T7(P<0.05). LF were comparable between groups D and C(P>0.05). Compared with T0,the HF of group D significantly increased and the LF/HF of group D significantly decreased at T1-T4(P<0.05). Compared with group C,the HF of group D significantly increased and the LF/HF of group D significantly decreased at T1-T4(P<0.05). Conclusion The appropriate dose of dexmedetomidine(loading dose 0.5μg/kg and maintenance dose 0.2μg · kg-1 · h-1)can significantly increase vagal tone and improve cardiac sympathetic and parasympathetic balance during tourniquet appli-cation.

Objective To observe the clinical effects of anti-vascular endothelial growth factor (VEGF) agent for retinopathy of prematurity (ROP) in different zones.Methods Retrospective analysis was performed on 24 ROP patients (46 eyes) who received intravitreal injection of anti-VEGF agent in our hospital from April 2013 to April 2014,including 15 patients (28 eyes) with Zone Ⅰ ROP and 9 patients (18 eyes) with Zone Ⅱ ROP.All the patients receive intravitreal injection of anti-VEGF agent Ranibizumab.The patients were observed for postoperative progression of fundus conditions,and the recovery rate and progression rate following initial injection were compared statistically between two groups.Results There was no statistically significant difference between the two groups in gestational age at birth or birth weight (both P ＞0.05);And statistically significant difference was found between two groups in gestational age at surgical correction (P =0.001).Following initial injection,the recovery rates were 32.14％ and 66.67％,and the progression rates were 67.86％ and 33.34％ in Zone Ⅰ ROP group and Zone Ⅱ ROP group,respectively,there was statistically significant difference between the two groups in recovery rate (x2 =5.263,P =0.022).The progression rate in Zone Ⅰ ROP group was higher than that in Zone Ⅱ ROP group,there was statistically significant difference (x2 =-2.269,P =0.023).During follow-up,no complications of intravitreal injection as cataract,endophthalmitis or retinal tears was observed;Only 2 patients experienced corneal edema,and 4 patients experienced subconjunctival hemorrhage.Conclusion Intravitreal injection of anti-VEGF agent is effective for both Zone Ⅰ and Zone Ⅱ ROP.While for Zone Ⅰ ROP,the surgery success rate is low and the reoperation rate is high,such treatment can provide favorable time and conditions for reoperation.

Objective To investigate the prenatal diagnosis and prognosis of fetuses with mild ventriculomegaly in order to provide evidence for clinical consultation and treatment.Methods The data of 116 mothers with fetal ventriculomegaly who received prenatal care in Peking University First Hospital between January 1,2013 and May 31,2015 were retrospectively analyzed.All cases of fetal ventriculomegaly were found by ultrasound screening,and were subsequently diagnosed by ultrasound consultation as mild ventriculomegaly.The results of fetal cerebral MRI and invasive prenatal diagnosis were analyzed and the growth and development of babies were followed up by telephone using the Gesell developmental scale.All data was analyzed by descriptive statistics.Results Of the 88 cases of solitary ventriculomegaly,48 (54.5％) received karyotype analysis or screening,and only one case was found to be abnormal,which was an unbalanced translocation.Of the 83 mothers with normal delivery,only one infant (1.2％) showed retardation of intelligence and motor development.Of the 28 cases of non-solitary ventriculomegaly,17 (60.7％) received karyotype analysis or screening,and no abnormalities were found.Of the 18 mothers with normal delivery,only one infant showed retardation of growth and development,and was found to have brain hypoplasia before delivery by MRI with normal karyotype.Conclusions The rate of abnormal karyotype in mild vetriculomegaly is very low in this study.The width of the lateral ventricles is stable during pregnancy and the prognosis of infants is good.Thus,whether invasive prenatal diagnosis is necessary for all the fetuses with isolated mild ventriculomegaly remains to be confirmed.

Objective To construct the eukaryotic expression vector for mouse microRNA miR-21 and identification its expression activ-ity in 293 cells. Methods The genomic sequence containing pre-miR-21 was amplified from mouse genomic DNA by PCR and cloned into the pRC/CMV plasmid. The constructed recombinant plasmid pRC/CMV-mmu-miR-21 was transfected to 293 cells by lipofectamine 2000, and the stably transfected cells were screened with G418,from which total RNA was extracted for detecting the expression of mature miR-21 by northern blot. In the meantime,a luciferase report plasmid examing the activity of miR-21 named pmiR-21-Luc reporter was also construc-ted,and luciferase activity analysis indicated the product of pRC/CMV-mmu-miR-21 indeed had biological activity. Results Both restriction enzyme digestion analysis and sequencing proved the recombinant plasmids were constructed correctly. The miR-21 was highly expressed in the screened clones of 293 cells and it had good biological activity. Conclusion The eukaryotic expression plasmid of mouse miR-21 was successfully constructed,which laid the foundation of further investigation of the role of miR-21 during skin wound healing.

Objective To evaluate the coronary lesions with two-dimensional strain echocardiography. Methods Sixty-seven patients with suspected coronary heart diseases who underwent coronary angiography were divided into two groups. Forty-two of them with coronary stenosis ≥70% were considered as patient group, and the other 25 with coronary stenosis ＜50% were regarded as control group. Two-dimensional strain was performed in all patients within 24 h before coronary angiography. Longitudinal systolic strain rate (SRs), early (SRe) and late (SRa) diastolic strain rate, systolic strain (Ss), and time to SRe (T-SRe) were measured and compared. Results Ss, SRs, SRe and SRe/SRa decreased significantly in regions controlled by coronary artery with ≥70% stenosis in patient group compared with those controlled by coronary artery with ＜50% stenosis in control group. SRs and SRe were the independent predictive factors of coronary stenosis ≥70%, and the sensitivity and specificity of SRe ＜0.91 to identify coronary stenosis ≥70% was 72.46% and 89.65%, respectively. Conclusion Two-dimensional strain echocardiography may accurately evaluate the coronary lesions by detecting regional myocardial diastolic function.

Objective To investigate the expression of stromal cell-derived factor-1(SDF-1)and its clinical significance in blood plasma of patients with breast tumor.Methods The level of SDF-1 protein was examined by enzyme linked immunosorbent assay(ELISA)in blood plasma of 26 patients with breast benign tumor and 52 patients with breast cancer.Results The SDF-1 protein in blood plasma was detected in both breast benign tumor patients and breast cancer ones.The level of SDF-1 protein in patients with breast cancer was higher than that in ones with breast benign tumor,and there was a statistical difference between them(P=0.000).In patients with breast cancer,the level of SDF-1 protein in axillary lymph node(ALN)metastasis positive patients was significantly higher than that in ALN metastasis negative ones(P=0.036).Conclusion The level of SDF-1 protein in blood plasma may be a specific tumor marker.Its level is correlated with lymph node involvement in breast cancer.

Objective To investigate the infection status of human papillomavirus (HPV) of females in Chongqing city ,in or‐der to provide scientific references for prevention of HPV infection and control of early cervical lesions .Methods The detection re‐sults of cervical cytology screening for 19 860 females in the University‐Town Hospital of Chongqing Medical University ,the First Affiliated Hospital of Chongqing Medical University and a county‐level hospital in Chongqing from January 2012 to January 2015 were collected ,and the HPV typing data were analysed .Results Among the 19 860 females ,5 681 females were infected with HPV ,the infection rate was 28 .61% .Due to the presence of multiple infection ,the actual infection frequency of HPV subtypes in 5 681 females was 8 906 .The infection frequency of high‐risk subtypes ,including multiple infections ,was 6 166 (accounted for 69 .23% ) .According to the probability of infection ,the top eight rate of subtype infection was HPV 52 ,16 ,58 ,6 ,CP8304(81) ,33 , 53 and 18 .The positive rate of single HPV infection was 19 .38% ,the positive rate of multiple infection was 8 .74% ,in which doub‐le infection was the main infection model .The infection rate of females aged 20 years old or less(43 .89% ) was the highest ,while have the infection rate of females aged 36-50 years old was the lowest(27 .26% ) .Conclusion The HPV infection rate of females in Chongqing is high ,the most of females infected by high‐risk subtype HPV .It is necessary to lay emphasis on preventing HPV 52 , 16 ,58 ,33 ,18 infection for females in Chongqing city .