Research on mixed teaching platform of pediatric clinical laboratory practice teaching based on the Laboratory Quality Management System / 中华医学教育探索杂志

Objective:To explore application of mixed teaching platform in the clinical practice teaching of the laboratory medicine in Children's hospitals.Methods:We constructed a mixed online and offline teaching platform based on the Laboratory Quality Management System (LQMS) in the Children's Hospital of Chongqing Medical University. The undergraduates from Batch 2016 ( n=15) and Batch 2018 ( n=12) of College of Laboratory Medicine of Chongqing Medical University were taken as control group and experimental group respectively. Traditional teaching method was adopted by the control group, and the mixed teaching method was adopted by the experimental group. The results of two groups' clinical practice assessment, rate of outstanding students (total score ≥ 90) and rate of satisfaction (score ≥ 90) were compared to evaluate the teaching effect. SPSS 17.0 was used to conduct t-test and Chi-square test. Results:The database of teaching platform includes 68 teaching cases, 198 pieces of courseware, 305 clinical cases and 3 036 atlases. The test bank has accumulated 4 657 tests, covering clinical laboratory, immunology, biochemistry, microbiology and blood transfusion. The results of students in experimental group were significantly better than those of the control group [the score of clinical practice assessment: (85.90±5.04) vs. (78.90±6.75)( P<0.05); rate of outstanding students: 33.3% (4/12) vs. 6.7% (1/15), P>0.05; rate of satisfaction: 86.7% (13/15) vs. 100.0% (12/12) ( P>0.05). Conclusion:The mixed online and offline teaching platform based on the LQMS is highly recognized by students and can significantly improve the effect of clinical practice teaching, which can provide typical medical case teaching at any time and make up for limited case type in children's hospital.

Clinical application of Neuroform Atlas stent-assisted coiling in the treatment of unruptured wide-neck intracranial aneurysms / 北京大学学报(医学版)

OBJECTIVE@#To assess the safety and efficacy of Neuroform Atlas stent used in treatment of unruptured wide-neck intracranial aneurysms.@*METHODS@#Clinical data of 62 patients with unruptured wide-neck intracranial aneurysms undergoing Neuroform Atlas stent-assisted coiling from August 2020 to September 2021 were retrospectively analyzed. There were 64 aneurysms in those 62 patients. Among them, 25 aneurysms were located at the bifurcation of M1 segment on middle cerebral artery, 16 at the anterior communicating artery, 10 at the C7 segment of internal carotid artery, 5 at the C6 segment of internal carotid artery, 4 at the apex of basilar artery, 3 at the A3 segment of anterior cerebral artery, and 1 at the M2 segment of middle cerebral artery. All the patients underwent Neuroform Atlas stent-assisted coiling, including 49 patients with single stent assisted coiling and 15 patients with dual stents assisted coiling (14"Y"style and 1"X"style). After the procedure, the immediate DSA was performed to evaluate the status of aneurysm occlusion and the parent artery patency. The clinical follow-up was performed 3 months after the operation and evaluated based on the modified Rankin Scale(mRS).DSA image was reviewed at 6 months after operation and Raymond grading scale was used to assess the status of aneurysm occlusion and the parent artery patency.@*RESULTS@#A total of 62 patients with 64 aneurysms were all achieved technical success(100%).The immediate post-procedural Raymond scale was assessed, including Raymond Ⅰ in 57 aneurysms(89.1%, 57/64), Raymond Ⅱ in 6 aneurysms(9.3%, 6/64) and Raymond Ⅲ in 1 aneurysm(1.6%, 1/64). The peri-procedural complications rate was 4.8%(3/62), 2 patients developed intraoperative thrombosis and 1 patient suffered from local subarachnoid hemorrhage. Among them, 55 patients obtained 3 months clinical follow-up after operation and all the patients had good outcomes (mRS≤2), 50 patients with 52 aneurysms were followed up with DSA 6 months after operation, including Raymond Ⅰ in 45 aneurysms(86.5%, 45/52), Raymond Ⅱ in 4 aneurysms(7.7%, 4/52) and Raymond Ⅲ in 3 aneurysms(5.8%, 3/52).@*CONCLUSION@#Neuroform Atlas stent for the treatment of unruptured wide-neck intracranial aneurysms has high safety and good efficacy, and has its advantages over other traditional stents.

The advantages of ulthera assisted resection of carotid body tumors / 中华普通外科杂志

Objective:To evaluate the use of ulthera in carotid body tumor resectionMethods:From Jun 2004 to Jun 2019 at the First Hospital of China Medical University. Forty-three shamblin grade Ⅱ or Ⅲ patients were retrospectively assigned to ulthera assisted carotid body tumor resection (26 cases) and traditional carotid body tumor resection (17 cases).Results:In ulthera assisted group, the average tumor diameter was (4.0±0.6) cm, compared to (3.9±0.9) cm in traditional carotid body tumor surgery group, P=0.875. The operation time of the two group was respectively (117.6±39.8) min and (149.4±55.0) min ( P=0.005), blood loss (145.7±70.6) ml vs. (194.1±80.7) ml ( P=0.006), hospital stay was (16.8±7.5) d vs. (22.7±13.0) d ( P=0.017), and following-up period was between 6 and 180 months. One patient relapsed in ulthera assisted group. The postoperative complications occurred in 8 and 7 cases respectively. Conclusion:Ulthera assisted carotid body tumor resection helps shorten operation time, hospital stay and decrease intraoperative blood loss.

Risk factors of intracranial hemorrhage with 125I seeds for the treatment of brain tumors / 中华内科杂志

Objective:To analyze the risk factors of intracranial hemorrhage after implanting 125-iodine seeds for brain tumors.Methods:A total of 234 patients with intracranial tumors receiving treatment of 125-iodine seeds from March, 2013 to November, 2020 were retrospectively analyzed. Patients were divided into bleeding group and non-bleeding group according to whether postoperative intracranial hemorrhage was reported. Univariate and multivariate analysis was performed by logistic regression to determine the independent risk factors of intracranial hemorrhage.Result:A total of 22 cases (9.4%) reported postoperative intracranial hemorrhage in 234 patients treated with 125-iodine seeds. Univariate analysis showed that the type of tumor and the history of anti-angiogenic drug within one month were possible risk factors ( P<0.1). Multivariate logistic regression analysis showed that anti-angiogenic drug within one month was the independent risk factor for intracranial hemorrhage ( P<0.05). Conclusions:The application of anti-angiogenic drugs within one month is the independent risk factor of intracranial hemorrhage with 125-iodine seeds for the treatment of brain tumors.

Construction of multi-epitope gene of periodic Brugia malayi and its expression in eukaryotic cells / 中华地方病学杂志

Objective:To construct a eukaryotic expression plasmid pcDNA3.1(+)-BmCPI502/BmGAPDH720 of periodic Brugia malayi cysteine protease inhibitor/glyceraldehyde 3-phosphate dehydrogenase (CPI502/GAPDH720) multi-epitope gene and observe its protein expression in Hela cells. Methods:Primers were designed according to the predicted gene sequences of T cell epitopes. The target gene fragment was amplified by reverse transcription (RT)-PCR using plasmid pGEM-T-CPI621 as template. The fragment was cloned into prokaryotic expression plasmid pET-28a(+) to construct prokaryotic expression plasmid pET28a(+)-BmCPI502. The BmCPI502 gene and BmGAPDH720 gene were amplified by RT-PCR, respectively. The gene fragments of pcDNA3.1(+), BmCPI502 and BmGAPDH720 were digested by double enzyme digestion and ligated with the target gene. The eukaryotic expression plasmid pcDNA3.1(+)-BmCPI502/BmGAPDH720 was constructed. The recombinant plasmid was transfected into Hela cells and verified by RT-PCR to obtain the desired target bands. The expression product was detected by sodium dodecyl sulfate polyacrylamide gelelectrophoresis (SDS-PAGE).Results:The recombinant plasmid pET28a(+)-BmCPI502 was obtained, and the 502 bp specific fragment was identified by enzyme digestion, which was in line with the expected value; the eukaryotic expression plasmid pcDNA3.1(+)-BmCPI502/BmGAPDH720 of the multi-epitope gene was successfully constructed, and the fragment size was in line with the expected value. The eukaryotic expression plasmid pcDNA3.1(+)-BmCPI502/BmGAPDH720 was transfected into Hela cells and the recombinant protein was stable expressed. SDS-PAGE analysis showed that the relative molecular weight ( Mr × 10 3) of the recombinant protein was about 50. Conclusions:The eukaryotic expression plasmid of pcDNA3.1(+)-BmCPI502/BmGAPDH720 of periodic Brugia malayi multi-epitope gene is successfully constructed, and the corresponding recombinant protein is obtained in eukaryotic cells. This study has laid a foundation for further study of the purification and biological activity of the recombinant protein.

Identification of microRNAs targeting vitamin D receptor and their effect on parathyroid hormone secretion in secondary hyperparathyroidism / 南方医科大学学报

OBJECTIVE@#To identify the miRNAs targeting vitamin D receptor (VDR) gene and their effect on parathyroid hormone (PTH) secretion in secondary hyperparathyroidism.@*METHODS@#Primary parathyroid cells with secondary hyperparathyroidism were isolated by collagenase digestion and cultured. The miRNAs targeting VDR were screened by bioinformatics methods and full transcriptome sequencing, and dual-luciferase reporter assay was used to verify the targeting relationship between VDR and the screened miRNA. The effects of overexpression or inhibition of the candidate miRNA on VDR mRNA and protein expressions and PTH secretion were evaluated using qRT-PCR and Western blotting. The expression levels of the candidate miRNAs and VDR mRNA in clinical specimens of parathyroid tissues were verified by qRT-PCR, and the expression of VDR protein was detected by immunohistochemistry.@*RESULTS@#We successfully isolated primary parathyroid cells. Dual-luciferase reporter assay verified the targeting relationship of hsa-miR-149-5p, hsa-miR-221-5p, hsa-miR-222-3p, hsa-miR-29a-5p, hsa-miR-301a-5p, hsa-miR-873-5p, hsa-miR-93-3p with VDR, and among them, the overexpression of hsa-miR-149-5p and hsa-miR-301a-5p significantly increased PTH secretion in the parathyroid cells. In patients with secondary hyperparathyroidism, hsa-miR-149-5p was highly expressed in the parathyroid tissues (P=0.046), where the expressions of VDR mRNA (P=0.0267) and protein were both decreased.@*CONCLUSION@#The two miRNAs, hsa-miR-149-5p and hsa-miR-301a-5p, may promote the secretion of PTH in patients with secondary hyperparathyroidism by down-regulating the expression of VDR gene.

Free anterolateral thigh flap with superficial temporal vessels as recipient vessels for reconstruction of defect after maxillectomy in malignant tumor / 中华耳鼻咽喉头颈外科杂志

Objective: To study the effects of superficial temporal artery and vein as recipient vessels for the free anterolateral thigh flap on the appearance and functions after maxillectomy. Methods: Clinical data of 21 patients with malignant maxillary tumors in Department of Oral and Maxillofacial Surgery, the Second Xiangya Hospital of Central South University from January 2014 to November 2019, who were treated by free anterolateral thigh flap with temporal superficial vessels as the recipient vessels were analyzed retrospectively. There were 18 males and 3 females, with the age ranging from 29 to 73 years old, including 19 cases of squamous carcinoma, 1 case of adenoid cystic carcinoma and 1 case of osteosarcoma. Of those 7 patients underwent primary surgery, 14 patients received resurgery, and 6 patients had a history of postoperative radiotherapy and chemotherapy. Among 14 patients with resurgery, 13 had recurrent ipsilateral second site tumor and 1 had recurrent tumor, and all of them received the maxillectomy and reconstructive surgery with the free anterolateral thigh flap. Patients were evaluated with water swallow test and speech intelligibility score in 1, 3 and 6 months after operation. The data were statistically analyzed with SPSS 22.0 statistical software. Water swallow test results before and after operation were compared using the Wilcoxon rank sum test. The mean speech intelligibility scores before and after operation were compared by the paired t test. Results: Patients were followed up for 10-60 months. All free flaps survived after operation. No diplopia occurred. Breathing, swallowing and speaking functions were normal. No movement disorders caused by the donor of thigh flap. Water swallow test showed no phenomenon of water flowing into the nasal cavity or oral and nasal leakage with level Ⅰ for 4 cases, level Ⅱ for 13 cases, level Ⅲ for 3 cases and level Ⅳ for 1 case. The mean speech intelligibility scores before surgery and 1, 3 and 6 months after surgery were 4.31±0.13, 1.46±0.21, 2.15±0.45 and 2.87±0.76 respectively. There was statistically significant difference in the mean speech intelligibility scores between 1 and 6 months after surgery (F=78.456, P<0.05). Conclusion: It is safe and reliable to use the superficial temporal vessels as recipient vessels for free anterolateral thigh flap in the reconstruction of defect after maxillectomy in malignant tumors, with good outcomes of functions and a satisfactory restoration of outward appearance.

Anti-sepsis effect and mechanism of Apocynum leavesbased on network pharmacology / 西安交通大学学报(医学版)

【Objective】 To study the mechanism of Apocynum leaves in the treatment of sepsis by network pharmacology method in order to explore the multi-dimensional research method of Xinjiang ethnic medicine treatment of infectious diseases and provide scientific theoretical basis for clinical medication. 【Methods】 TCMSP and literature collection were used to screen the main active components of Apocynum venetum leaf, and target prediction analysis was conducted by SwissTarget Prediction database. We used Genecards database to screen relevant targets for sepsis, used Omicshare to calculate Venn figure of the intersection targets, constructed the protein-protein interaction network diagram in the STRING database, used Ensembl for name conversion of protein targets, then entered Omicshare server for Go function and KEGG pathway enrichment of dynamic analysis. Last we used Cytoscape3.6.0 software to construct "Apocynum venetum leaf-the active ingredients-targets-Go-KEGG-sepsis" network to explore the mechanism of action of Apocynum’s resistance to sepsis. 【Results】 Kaferol, luteolin, proanthocyanidin B1 and phytosterol in Apocynum venetum leaves may treat sepsis by controlling signal transduction, regulating hormone level and anti-infection through predictive biological targets such as Akt1, VEGFA, MAPK3, EGFR, Src and PTGS2. They can play an important role through VEGF, EGFR, erbB, HIF-1, RAS and other enrichment pathways. 【Conclusion】 The active components of Apocynum venetum leaves can fight against sepsis through multiple targets and multiple pathways.

Progress of Research on Forkhead Box Q1 Gene in Digestive Tract Tumors / 胃肠病学

Transcription factor forkhead box Q1 (FOXQ1) is a member of forkhead box (FOX) superfamily, which exists widely in a variety of tissues and organs of human body. FOXQ1 protein affects the genesis, progression, invasion and metastasis of tumor by promoting epithelial-mesenchymal transition (EMT) and activating multiple cell signal transduction pathways. In recent years, studies have found that FOXQ1 is abnormally expressed in a variety of digestive tract tumors. In-depth study on the expression and mechanism of FOXQ1 in digestive tract tumor is of great significance for early diagnosis and specific molecular therapy of digestive tract tumors. This article reviewed the latest literatures related to FOXQ1 and digestive tract tumors, and expounding its mechanism in the progression of different digestive tract tumors, in order to provide theoretical basis and reference for the research and development of new chemotherapy drugs.

Application of medical magnifying loupes in diagnosis of oral mucosal diseases / 浙江大学学报·医学版

: To evaluate the application of medical magnifying loupes in diagnosis of oral mucosal diseases. Twenty-four patients with plaque-type oral lichen planus or homogeneous oral leukoplakia were inspected by naked eyes or assistance with magnifying loupes. Histopathological results were used as the gold standard to evaluate the sensitivity, specificity and accuracy of the two methods in clinical diagnosis. Questionnaires were used to evaluate the subjective effect of magnifying loupes on the diagnosis efficiency of oral mucosal diseases and to explore the most suitable parameters for application. The sensitivity, specificity and accuracy of medical magnifying loupes for the identification of plaque-type oral lichen planus and homogeneous oral leukoplakia were 94.74%, 100.00% and 95.83%, respectively, which were significantly higher than those of naked eye inspection (89.47%, 80.00% and 87.50%). The effective rate of magnifying loupes assisted diagnosis was 91.76% according to physicians' subjective evaluation. The most suitable parameters were 3.5 times magnification and working distance. The medical magnifying loupes can effectively improve the efficiency of the inspection and diagnosis of oral mucosal diseases, and have the characteristics of convenience and real-time. The recommended clinical parameters are 3.5 times magnification and working distance.

Hypoxia-mediated mirnas affect glucose metabolism: New recognition of preventing and controlling glucose metabolism / 中国组织工程研究

BACKGROUND: MiRNAs have been shown to be closely related to obesity and diabetes, which can be potential biomarkers for the diagnosis and prognosis of diabetes. OBJECTIVE: To review the roles of miRNAs in promoting insulin sensitivity, controlling insulin synthesis and regulating insulin resistance in hypoxic exercise, and to explore the mechanism of hypoxic exercise-mediated miRNAs in regulating glucose metabolism. METHODS: Relevant studies on hypoxic exercise glucose metabolism and miRNAs in PubMed, CNKI, WanFang databases were searched. The keywords were “miRNAs, low oxygen movement, hypoxic exercise, hypoxia-mediated, sugar metabolism, glucose metabolism” in English and Chinese, respectively. Relevant literatures published from 2007 to 2019 were searched and screened according to inclusion and exclusion criteria. RESULTS AND CONCLUSION: MiRNAs have the potential to regulate the expression of major protein cascades in the insulin signaling pathway by regulating the expression of target genes and thereby affecting the homeostasis of glucose metabolism. miRNAs can also be used as single molecules or in combination therapy. There is an urgent need to integrate miRNAs into insulin signaling pathways and develop new miRNAs-related diagnostic and therapeutic approaches in hopes of addressing type 2 diabetes in the future. Studying the mechanism of the effects of miRNAs on glucose metabolism in hypoxic exercise can not only provide a theoretical basis for scientific hypoglycemic and body mass control, but also can be used as an intervention for the prevention and control of diseases related to glucose metabolism disorders. Diseases caused by abnormal glucose metabolism provide new therapeutic approaches.

Human β-defensin 3 gene modification promotes the osteogenic differentiation of human periodontal ligament cells and bone repair in periodontitis / 国际口腔科学杂志·英文版

Efforts to control inflammation and achieve better tissue repair in the treatment of periodontitis have been ongoing for years. Human β-defensin 3, a broad-spectrum antimicrobial peptide has been proven to have a variety of biological functions in periodontitis; however, relatively few reports have addressed the effects of human periodontal ligament cells (hPDLCs) on osteogenic differentiation. In this study, we evaluated the osteogenic effects of hPDLCs with an adenoviral vector encoding human β-defensin 3 in an inflammatory microenvironment. Then human β-defensin 3 gene-modified rat periodontal ligament cells were transplanted into rats with experimental periodontitis to observe their effects on periodontal bone repair. We found that the human β-defensin 3 gene-modified hPDLCs presented with high levels of osteogenesis-related gene expression and calcium deposition. Furthermore, the p38 MAPK pathway was activated in this process. In vivo, human β-defensin 3 gene-transfected rat PDLCs promoted bone repair in SD rats with periodontitis, and the p38 mitogen-activated protein kinase (MAPK) pathway might also have been involved. These findings demonstrate that human β-defensin 3 accelerates osteogenesis and that human β-defensin 3 gene modification may offer a potential approach to promote bone repair in patients with periodontitis.

Predictive value of fragmented QRS wave for prognosis in patients with acute no ST elevation myocardi‐al infarction／ / 心血管康复医学杂志

To explore predictive value of fragmented QRS wave (fQRS) for prognosis in patients with a‐cute no ST elevation myocardial infarction (NSTEMI).Methods : According to ECG measure result , 120 NSTEMI patients treated in our hospital from Jan 2015 to Feb 2017 were divided into fQRS group (n＝73) and no fQRS group (n＝47).Both groups received same treatment .General information and incidence of MACE during one‐year fol‐low‐up were compared between two groups .Results : There were no significant difference in heart rate ,percentage of dyslipidemia ,hypertension and diabetes mellitus between two groups ( P＞ 0. 05 all).Compared with no fQRS group ,there were significant reduction in left ventricular ejection fraction [(63. 81 ± 5.67)% vs.(52. 18 ± 5. 81)%, P＝0. 001] , and significant rise in percentage of previous myocardial infarction (21.28% vs.39. 73%, P＝0.035) and more than three coronary stenosis greater than or equal to 50%(36.17% vs.54.79%, P＝ 0.046) in fQRS group .Compared with no fQRS group ,incidence of MACE of fQRS group was higher (25. 53% vs.45.21%, P＝0.030).Conclusion :Cardiac function of NSTEMI patients with fQRS is significantly poorer than that of patients without fQRS ,so patients with fQRS predicts their state of an illness is serious and prognosis is poor .

MicroRNA-663 facilitates the growth, migration and invasion of ovarian cancer cell by inhibiting TUSC2

BACKGROUND: MicroRNAs (miRNAs) have emerged as the critical modulators of the tumorigenesis and tumor progression. METHODS: The levels of miR-663 in ovarian cancer cell lines and clinical tissues were detected using qRT-PCR assays. The Transwell invasion and wound healing assay were conducted to assess the roles of miR-663 in the migration and invasion of ovarian cancer cell in vitro. Rescue assays were carried out to confirm the contribution of tumor suppressor candidate 2 (TUSC2) in the aggressiveness of cancer cell which was regulated by miR-663. RESULTS: The levels of miR-663 were up-regulated in ovarian cancer tissues in comparison with the corresponding normal tissues. Up-regulation of miR-663 increased the proliferation, colony formation, migration and invasion of ovarian cancer SKOV3 cell. Additional, over-expression of miR-663 increased the tumor growth of SKOV3 in xenograft model. Bioinformatics analysis and luciferase reporter assay identified that miR-663 decreased the level of TUSC2 via binding to the 3'-UTR of TUSC2 gene. Finally, the expression of TUSC2 was inversely associated with the level of miR-663 in ovarian carcinoma tissue and over-expression of TUSC2 inhibited the migration and invasion abilities of SKOV3 that was promoted by miR-663. CONCLUSION: Altogether, these results indicate that miR-663 acts as a potential tumor-promoting miRNA through targeting TUSC2 in ovarian cancer.

Effect of Kangai injection combined with GP chemotherapy in the treatment of patients with advanced non-small cell lung cancer and its influence on quality of life / 中国基层医药

Objective@#To study the effect of Kangai injection combined with GP chemotherapy in the treatment of patients with advanced non-small cell lung cancer(NSCLC) and its influence on quality of life (QOL).@*Methods@#Eighty-five patients with advanced NSCLC were selected, and they were divided into control group(42 cases) and observation group (43 cases) according to the digital table.All patients were under the control of basic diseases and routine care.The control group was treated with GP regimen: gemcitabine combined with cisplatin, 21d as a course of treatment, continuous treatment for 4 courses.The observation group was treated with Kangai injection on the basis of the control group, and synchronized with chemotherapy.The immune function, QOL, curative effect and adverse reactions were compared between the two groups before and after treatment.@*Results@#After treatment, the CD3+ , CD4+ , NK and CD4+ /CD8+ of the control group decreased, the CD8+ increased, and the CD3+ , CD4+ , NK and CD4+ /CD8+ of the observation group increased, the CD8+ decreased, the differences were statistically significant(t=6.704, 7.340, 11.080, 13.832, 5.033, all P<0.05). After treatment, the QOL scores of the observation group were higher than those of the control group(t=4.100, 6.698, 8.217, 4.146, 5.790, all P<0.05). The effective rate of the control group was 28.57%, which of the observation group was 41.86%, there was no statistically significant difference(χ2=1.643, P=0.200). The clinical control rate of the control group was 66.67%, which was lower than 86.05% of the observation group, the difference was statistically significant(χ2=4.435, P<0.05). The main side effects were myelosuppression and gastrointestinal reactions, and the incidence rates of WBC, thrombocytopenia and nausea and vomiting in the control group were higher than those in the observation group, the differences were statistically significant(χ2=8.880, 4.170, 0.553, 5.409, all P<0.05).@*Conclusion@#Kangai injection combined with GP chemotherapy in the treatment of patients with advanced NSCLC can improve the clinical control rate, QOL and immune function of patients, reduce the toxic and side effects, and it is worthy of promotion.

Application of ureteral access sheath with vacullm suction during fexible ureteroscopy lithotripsy in treatment of renal stones / 中国内镜杂志

Objective To investigate the safety and efficacy of ureteral access sheath (UAS) with vacullm suction during flexible ureteroscopy lithotripsy in treatment of renal stones. Methods 96 cases of renal stones patients who received flexible ureteroscopy lithotripsy were retrospectively analyzed and divided into two groups:control group with 50 cases and treatment group with 46 cases. The stones free rate, operation time, intrapelvic pressure, renal colic, formation of steinstrasse, SIRS, Calcitonin Zymogen, leukocyte count, hospitalization time, hospitalization costs and treatment efficiency were evaluated after one month. Results The average, maximum and minimum intrapelvic pressure of treatment group was much lower than that of control group (P < 0.05); After one month, the treatment efficiency and stones free rate of control group was 70.0% and 82.0%, lower than that of treatment group (P < 0.05); The operation time of control group and treatment group was(108.6 ± 3.5) min, (86.3 ± 5.2) min (P < 0.05); The cases of renal colic, steinstrasse and SIRS of control group after treatment was 13 cases, 11 cases, 10 cases which was more than that of treatment group with 2 cases respectively (P < 0.05); The hospitalization time, hospitalization costs of control group and treatment group was (8.8 ± 1.1) d, (23 067.5 ± 392.8) RMB and (7.7 ± 1.2) d, (21 957.3 ± 378.6) RMB (P < 0.05); The Calcitonin Zymogen, leukocyte count of control group and treatment group was (1.5 ± 0.3) and (0.3 ± 0.1) ng/ml, (14.6 ± 0.5)×109/L and (6.4 ± 0.6)×109/L (P < 0.05). Conclusion The application of ureteral access sheath with vacullm suction during flexible ureteroscopy lithotripsy in treatment of renal stones was simple, safe and effective, and can shorten the operation time, improve the rate of clearing stone and treatment efficiency, reduce the incidence of adverse reactions. The application can be extended.

Effects of SAHA on Twist and HDAC1 expression in renal tissues of dia-betic rats / 中国病理生理杂志

AIM:To observe the effects of suberoylanilide hydroxamic acid(SAHA )on the expression of Twist,histone deacetylase 1(HDAC1),and the factors associated with epithelial-mesenchymal transition and extracellular matrix in diabetic rat renal tissues and its possible mechanism.METHODS:The rat model of diabetes mellitus(DM)was established by injection of streptozotocin.The rats were randomly divided into normal control(NC)group,DM group and SAHA group.When the model was successfully established for 8 weeks ,the rats in SAHA group were intragastrically trea-ted with SAHA at dose of 25 mg· kg-1 · d-1.After 8 weeks of treatment ,the rats were sacrificed.The biochemical pa-rameters and renal index were measured ,and the pathomorphological changes of the renal tissues were observed by HE and Masson staining.In addition ,the expression of Twist in renal tubular epithelial cells was evaluated by immunohistochemis -try.The protein levels of Twist,HDAC1,E-cadherin,α-SMA and collagen type Ⅳ(Col-Ⅳ)were determined by Western blot.The mRNA expression of Twist was detected by real-time PCR.RESULTS:The blood glucose ,24 h urine protein and kidney index in DM group were all obviously higher than those in NC group ,while kidney index was reduced in SAHA group as compared with DM group(P<0.05),but the blood glucose and 24 h urine protein markedly wasn't influenced by SAHA treatment.Compared with NC group,the mRNA and protein levels of Twist and protein levels of HDAC 1,α-SMA and Col-Ⅳwere increased in DM group(P<0.05),while they decreased in SAHA group as compared with DM group(P<0.05).The protein level of E-cadherin in NC group was higher than that in DM group ,and that was increased in SAHA group as compared with DM group(P<0.05).The correlation analysis showed that the Twist protein level was positively correlated with the HDAC1 protein level(P<0.05).CONCLUSION:SAHA decreases the expression of Twist and attenuates renal tubule fibrosis in DM rats by inhibiting the expression of HDAC 1 and Twist,thus promoting the tran-scription of E-cadherin.

Comparison of methods for extraction of short RNA-DNA hybrids / 军事医学

Objective To compare the effects of three different methods for extracting short RNA-DNA hybrids, including the TRI reagent method , the phenol saturated with water method and the phenol saturated with Tris buffer method in order to facilitate studies on the biological function of RNA-DNA hybrids .Methods Short RNA fragments modifiedwith FAM at the 5′end and those modified with Cy 5 at the 5′end were synthesized .RNA and DNA fragments were annealed to form RNA-DNA hybrids.They were extracted with the above-mentioned 3 methods respectively .The extracted products were analyzed with electrophoresis .Results and Conclusion Short RNA-DNA hybrids can be extracted by the phenol saturated with water method and by the phenol saturated with Tris buffer method .The results can help study the function of short RNA-DNA hybrids .

Cloning,expression and biological activity of m6A binding protein YTHDF2 / 军事医学

Objective To construct the recombinant plasmid of YTH domain family 2(YTHDF2)and express it in E.coli in order to obtain YTHDF2 fusion protein that was capable of binding m 6A-modified RNA.Methods The coding region of YTHDF2 gene was amplified by RT-PCR.The recombinant plasmid pET-28a-YTHDF2 was constructed and expressed in E.coli.The fusion protein was purified by Ni2+-NTA resin affinity chromatography, while the fusion protein activity was analyzed by Ni2+-NTA magnetic spheres.Results and Conclusion The recombinant YTHDF2 protein was expressed in E.coli BL21(DE3)and purified.YTHDF2 fusion protein was capable of binding RNA with m 6A-modification. The preparation of YTHDF2 fusion protein provides an essential tool to study the biological function of RNA with m6A-modification.

Establishment of biology reference interval of PCT in children in Chongqing / 国际检验医学杂志

Objective To establish the biological reference interval of procalcitonin(PCT) applicable for children in Chongqing.Methods Serum PCT level were detected in 120 healthy children with age from 0 to 16 years, including 73 cases of male and 47cases of female children, by using by Maglumi2000 plus PCT analysis system.All data was evaluated according to EP28-A3c document to establish the biological reference interval.Results Data of PCT levels were with non-normal distribution, and without statistical difference between children of different ages and genders(P>0.05).The biological reference interval of PCT was less than or equal to 0.038 μg/L.Conclusion It might be important to establish a usefully biological reference interval in different laboratories with relative detection system, especially for children.