Background:Recent studies have shown that long non-coding RNAs(lncRNAs)play important roles in carcinogenesis and cancer biology and the related context has attracted more and more attentions. PVT1,which encodes a lncRNA,is reported to be up-regulated and exhibit pro-oncogenic activity in a wide variety of human cancers. Aims:To investigate the expression of PVT1 in human pancreatic cancer cells and its effect on proliferation and apoptosis of HPAF-Ⅱ cells. Methods:One target siRNA against PVT1 was synthesized and transfected into HPAF-Ⅱ cells by using lipofactamine technique. PVT1 mRNA expression was detected by real-time PCR;capability of cell proliferation was examined by MTS and colony formation assays;cell cycle progression and apoptosis were measured by flow cytometry;and Western blotting was performed to determine the expressions of apoptosis-related proteins and proto-oncogene protein c-Myc. Results:The mRNA expression of PVT1 in several human pancreatic cancer cell lines,especially HPAF-Ⅱ cells was significantly higher than that in H6c7,a human immortalization normal pancreatic ductal epithelial cell line. Compared with HPAF-Ⅱ cells transfected with negative control siRNA or without transfection,silencing of PVT1 by siRNA-PVT1 resulted in remarkable reduction in cell proliferation,cell cycle G1 phase arrest,and notable apoptosis;meanwhile,the expressions of apoptosis-related proteins(cleaved-caspase-3 and cleaved-PARP)were up-regulated,the ratio for Bcl-2 / Bax was decreased,and the expression of c-Myc protein was down-regulated. Conclusions:LncRNA-PVT1 is highly expressed in human pancreatic cancer cell line HPAF-Ⅱ. It may affect the proliferation and apoptosis of HPAF-Ⅱ cells partially through regulating c-Myc expression.

Objective To investigate the results of follow-up visits of pregnancy course, delivery and infants of women who got clinically pregnant by assisted reproductive technique after gonadotropin-releasing hormone agonist (GnRH-a) added for luteal support, and to analyse the influence of adding GnRH-a in luteal support on the safety of mother and infant. Methods A retrospective analysis was carried out on the medical record from 215 patients who got clinically pregnant after luteal phase long regimen fresh-cycle transfer was operated. According to the differences in luteal support methods, the patients were assigned to Group A (124 patients, progesterone+dydrogesterone group), Group B (91 patients, GnRH-a added group). The patients′ pregnancy course, delivery time, and the growth and development of infants within 1-2 years were followed up. Results (1)There was no obvious difference between Group A and Group B in terms of the abortion ratio during the early pregnancy (8.1%, 12.1%), the rate of abortion villous deformity (50.0%, 9.1%), the rate of heterotopic pregnancy (10.5%, 5.5%) and rate of twin pregnancy (19.4%, 28.6%;all P>0.05).(2)Compared to group A, during the middle and late pregnancy of single or twin pregnancy in Group B , there was no obvious difference in the rate of fetal chromosomal abnormality, organ malformation incidence, late abortion rate and stillbirth rate (all P>0.05).(3)As to childbirth, in the case of twin pregnancy, there was a higher rate of premature delivery (60.0%, 39.1%;P=0.041), as well as rate of lower birth weight of newborn (56.0%, 34.8%; P=0.037) in group B.(4)The statistics on general growth and development as well as infantile common diseases within 2 years after birth indicated that there was no obvious difference between the two groups in single birth and twin birth subgroup (all P>0.05). Conclusion On the basis of controlling of implanted embryos and reducing the occurrence of twins, GnRH-a luteal support maybe relatively safe and effective.

Objective To construct the eukaryotic expression vector of pcDNA3.1-PEA-15 and express it in the human esophageal cancer (EC-109) cells,and to explore the effect of PEA-15 on EC-109 cells.Methods The PEA-15 gene was amplified from EC-109 by reverse transcriptase polymerase chain reaction (RT-PCR) and ligated to eukaryotic expression vector pcDNA3.1.After confirmation of recombinant plasmid was correctly by endonuc]eases digestion and DNA sequencing,the construct was transfected it into EC-109 through liposome inducing.The expression of PEA-15 in transfected EC-109 was detected by RT-PCR and Western blot.The cell growth inhibition ratio was evaluated by MTT assay.Results RT-PCR indicated that PEA-15 was highly expressed in EC-109 cells.The amplified fragment by RT-PCR was coincident with hypothesis enzyme digestion analysis and DNA sequencing confirmed that the pcDNA3.1-PEA-15 was constructed successfully.The expression of PEA-15 gene was increased obviously in the transfected EC-109 detected by RT-PCR and Western blot respectively (t =4.078,5.269,P ＜ 0.05).The cell growth inhibition ratio in the group which transfected pcDNA3.1-PEA-15 was significantly lower compared with the pcDNA3.1 transfect group after 72 hours (t =6.163,P ＜ 0.05).Conclusions The recombinant eukaryotic expression vector pcDNA3.1-PEA-15 is constructed successfully,and it can be expressed in EC-109.It also shows that PEA-15 has the function on cell growth which suggests that PEA-15 can inhibit the apoptosis of EC-109 cells and its expression involved in esophageal cancer development.

Objective:To study the incidence, clinical features, diagnosis, and treatment of angioimmunoblastic T-cell Lymphoma (AITL). Methods:We retrospectively analyzed the clinical data of 31 patients with AITL treated in the tumor hospital of Harbin Medical University between January 1995 and January 2008. We also analyzed the incidence, clinical features, diagnosis, and treatment of AITL. Results:The complete response rate and partial response rate of the entire group were 54.8%and 16.1%, respectively. The overall response rate was 70.9%, and the median survival time was 27.3 months. The five-year survival rate of the entire group was 35%. The response rate was 76.5%in the CHOP group and 75%in the COP group. No significant differences were detected between two groups (P>0.05). Con-clusion:The symptoms and signs of ATIL differ in different sites. The COP and CHOP regimens have similar efficacy and tolerable side effects.

ObjectiveTo explore the reliability and validity of WHO ICF-Clinical Checklist for patients with spinal cord injuries.MethodsClinical testing, case records and check had been implemented for 50 patients with spinal cord injuries with ICF-Clinical Checklist, ADL and ASIA.Results and ConclusionThere were high test-retest reliability and validity in WHO ICF-Checklist for patients with spinal cord injuries.

目的探讨《国际功能、残疾和健康分类》(ICF)临床检查表(中文版)与美国脊柱损伤协会(ASIA)损伤分级和日常生活活动(ADL)在脊髓损伤患者评定中的相关性。方法采用临床测评方法,运用ICF临床检查表、ADL评定和ASIA损伤分级评定法,对50例脊髓损伤患者进行综合评定。结果受试者ICF得分与ADL总分和ASIA分级分之间呈明显负相关(P<0.05—0.01)。结论ICF临床检查表指标较ADL和ASIA更全面。

Objective To study the changes of gonadotropin releasing hormone agonist (GnRH-a) in pinopodes during luteal phase and to explore the possible mechanism of GnRH-a in luteal phase support of assisted reproductive technology (ART).Methods Totally 40 primary infertility women who were treated with ART due to male factors were enrolled,according to the order of the group they were randomly divided into experimental group and control group.On the 7th day after ovulation,the experimental group received a subcutaneous injection of 0.1 mg of GnRH-a,while the control group received a subcutaneous injection of placebo only (0.9％ salinc 2 ml),3 days later they came to the clinic again.Serum estradiol and progesterone levels were measured before and after treatment in each group.Pinopodes were collected for electron microscopic examination.Levels of ER and PR were detected by western blot.Results (1) There was no significant difference between the experimental group and the control group in the estrogen level before and after the treatment (all P＞0.05).The level of progesterone in the experimental group after treatment [(66.8± 14.9) nmol/L] was significantly higher than that before treatment(P＜0.05);also significantly higher than the same period of the control group (P＜0.05).(2) There was no significant difference in the expression of ER protein in the experimental group before and after treatment (P＞0.05).The expression of PR in the experimental group after treatment was significantly lower than that before treatment (P＜0.05);also lower than the same period of the control group (P＜0.05).(3) Expression amount of pinopodes in the experimental group after treatment was significantly higher than that before treatment [65％ (13/20) versus 25％ (5/20),P＜ 0.05],and the development trend was more mature [the percentage of maturation:75％ (15/20) versus 35％ (7/ 20),P＜0.05].Expression amount of pinopodes after treatment and the percentage of maturation in the experimental group were significantly higher than those in the same period of control group (P＜0.05).Conclusion GnRH-a in luteal phase support may play a role through the corpus luteum,which may promote the secretion of progesterone,downregulation of PR expression,promote the growth of pinopodes,and improve the endometrial receptivity.

This paper reviews the progress in biochemical design and modification for the surfaces of titanium implants in recent years, the emphasis being laid on the introduction of the surface molecular construction, self-assembly technique and its application in biomedical materials.
Biocompatible Materials ; chemistry ; Prostheses and Implants ; Surface Properties ; Titanium ; chemistry

OBJECTIVETo analyze the results of the first-stage toxicological evaluation of 1 502 pesticide samples.

METHODSThe classification of the 1 502 pesticide samples was analyzed, and the experimental results of the samples in different years were compared.

RESULTSMost of the 1 502 pesticide samples were insecticides, accounting for 52.5% of all, followed by bactericides and herbicides. In the 5 years, the proportion of biogenic insecticides showed a significant rising trend (χ² = 11.426, P < 0.05). The proportion of single pesticides was 65.8%; mixed pesticides accounted for 32.7%; original pesticides accounted for only 1.5%. From 2008 to 2012, most pesticides had low toxicity, regardless of the exposure route (via the mouth, skin, or respiratory tract). Acute oral and dermal toxicity tests showed that pesticides with moderate toxicity declined year by year (oral exposure χ² = 18.036, P < 0.01; dermal exposure χ² = 40.482, P < 0.01). There was a small proportion of pesticides with high toxicity. We did not detect any pesticide with extreme toxicity. Acute skin irritation and eye irritation test showed an upward trend in proportion of non-irritating pesticides (χ² = 77.110, P < 0.01; χ² = 12.693, P < 0.05), while the proportion of medium-irritation pesticides decreased significantly (χ² = 18.941, P < 0.01; χ² = 13.129, P < 0.05). Sensitization test showed that all samples were weak sensitizers.

CONCLUSIONThe major type of investigated pesticides was insecticide. Most samples were single pesticides, and there was a certain proportion of mixed pesticides. Novel pesticides such as bio-pesticides are the development tendency. The tested pesticides were mainly low-toxicity pesticides, with a certain proportion of medium- and high-toxicity pesticides. Personal protection should be strengthened during production and use of pesticides.

Objective To evaluate the prevalence of full thickness rotator cuff tear in patients with proximal humeral fractures,and the relationships between different risk factors.Methods Data of 113 patients with proximal humeral fractures from January 2014 to January 2016 who underwent surgical treatment were retrospectively analyzed.The general characteristics of patients (age,sex,cause of injury) were recorded and the rotator cuff was evaluated preoperatively on MRI and explored intra-operatively.We calculated and compared the incidence rate of age,sex in patients with and without rotator cuff tear.And the incidence rate of rotator cuff tear in different types of fracture according to Neer classification was calculated.Results The full thickness ro tator cuff tear were indentified in 28 patients (24.8％),and 21 of them had been confirmed by MRI preoperatively.Statistical significant difference was found between patients with rotator cuff tear group (average of 75.11± 10.89 years old) and without rotator cuff tear group (64.68± 13.43) for the age of the patient.Full thickness rotator cuff tear was most common in Neer 3 GT fracture (33.3％,8/54),followed by Neer 2 GT (26.67％,4/15) and Neer 2 SN (17.65,6/34),however,no full thickness rotator was found in Neer 4 type fracture.There were 4 patients with total rotator cuff tear who had symptom of shoulder before the operation.The other 24 patients had no symptom of shoulder.Conclusion Patient age was found as a risk factor for full thickness rotator cuff tear in humeral proximal fractures with the rate of 24.8％.Full thickness rotator cuff tear was most common in Neer 3 GT fracture.