Objective: To study the effect of HSVtk/GCV system on ascites tumors. Methods: Using the methods of modified XTT assay, animal experiment, transmission electron microscopy (TEM ) and flow cytometric ( FCM) assay. Results: The sensitivity of P388tk cell was about 37-fold than that of their patental P388 cell. Furthermore we found P388tk cells exhibited potent bystander killing. In vivo , the growth of tumors, which were produced by injecting P388tk cells or a mixture of 50% P388tk cells and 50% P388 cells into DBA/2 mice, was inhibited , furthermore mice survival periods were prolonged contrasted to control groups. Conclusion: HSVtk/GCV suicide gene system could effectively killed the HSVtk-gene-positive P388tk cells and nearby HSVtk-gene-negative cells by the bystander effect in vitro and in vivo.

Adolescent ; Adult ; Cytarabine ; administration & dosage ; blood ; pharmacology ; Drug Interactions ; Female ; Humans ; Instillation, Drug ; Leukemia ; blood ; drug therapy ; Male ; Methotrexate ; administration & dosage ; blood ; pharmacology ; Middle Aged ; Young Adult

Stem cells refer to undifferentiated or inad equately differentiated cells that have the ability to become a variety of tissues,regenerate organs,and self expand.There is strong evidence that stem cells have abilities of self renewal differentiation,immune regulation,and a potential for targeted therapy,which all together support development of stem cell transplantation.Stem cell transplantation thera py has become a hot topic in recent years,and the basic theory and clinical application have made great progress.The a bilities of stem cells make their transplantation ideal to pro mote liver regeneration,inhibit liver fibrosis,and provide treatment for many diseases.This article will review the cur rent status and outlook of stem cell transplantation.

Objective To explore the relationship between pulse wave velocity(PWV)and blood pressure classification and cardiovascular risk factors stratification in patients with essential hypertension. Methods Totally,390 patients with essential hypertension were recruited in the study and their carotid- femoral PWVs were recorded by an automatic pulse wave velocity measurement system.The patients were stratified by their cardiovascular risk factors.PWVs were compared between patients with varied blood pressures or with and without cardiovascular risk factors.Results There was no significant difference in PWV between patients of phase 1 and phase 2 hypertension,[(10.8?1.7)m/s vs.(11.9?1.2)m/s,P =0.398].PWV in patients with more than one risk factor was significantly higher than that in those with hypertension alone,[(10.4?1.4)m/s vs.(11.7?1.4)m/s,P=0.018].Conclusions PWV in hypertensive patients with one or more than one other risk factors was significantly higher than that in those without other risk factors.Cardiovascular risk factor might play a more important role in arterial stiffness.

Background: Hepatocyte nuclear factor 4α (HNF4α) plays an important role in the development of liver,and studies demonstrate that it is correlated with the pathogenesis of hepatocellular carcinoma (HCC).However,the regulatory effect of HNF4α on expression of vascular endothelial growth factor (VEGF) in human HCC cell lines and tube formation of human umbilical vein endothelial cell (HUVEC) is not yet clear.Aims: To investigate the effect of HNF4α on expression of VEGF in human HCC cell lines and tube formation of HUVEC.Methods: Lentiviral vector overexpressed HNF4α was constructed,and then transfected into HepG2 and SMMC-7721 cells (experimental group),cells transfected with lentiviral blank vector and cells without transfection were served as negative control group and blank control group,respectively.The mRNA and protein expressions of HNF4α,VEGF were detected by qRT-PCR and Western blotting,respectively.The conditioned media of HepG2 and SMMC-7721 cells were co-cultured with HUVEC,and number of HUVEC tube formation was measured.Results: HepG2 and SMMC-7721 cells with stable overexpression of HNF4α were successfully established.Compared with negative control group and blank control group,mRNA and protein expressions of VEGF in experimental group were significantly decreased (P＜0.05),and number of HUVEC tube formation was significantly decreased (P＜0.05).Conclusions: HNF4α can significantly inhibit the expression of VEGF in HepG2 and SMMC-7721 cells and tube formation of HUVEC.

Objective To explore the prognostic value of pre-chemotherapy serum cystatin C (Cys C) in patients with castration-resistant prostate cancer (CRPC).Methods The medical records of 48 patients with CRPC were reviewed.These patients were diagnosed and underwent docetaxel-based chemotherapy in Xinjiang Military Command General Hospital between January 2009 and January 2015.Statistical analysis was performed to identify the clinical and prognosis value of Cys C.Results Of 48 patients with CRPC,the expression of serum Cys C before chemotherapy was related with Gleason score (x2 =4.218,P =0.040) and distant metastasis(x2 =4.090,P =0.043).23 patients was in high group (Cys C ＞ 1.61 mg/L),25 in low (Cys C ≤ 1.61 mg/L).The median survival time of high group and low group were 15.6 and 25.3 months,respectively (x2 =13.876,P ＜ 0.001).Univariate analysis showed that TNM stage (x2 =6.934,P =0.018),Gleason score (x2 =7.933,P =0.005),baseline prostate specific antigen (PSA) (x2 =9.038,P =0.003),number of chemotherapy cycles (x2 =5.024,P =0.028),distant metastases (x2 =6.963,P =0.013) and serum Cys C before chemotherapy (x2 =6.976,P =0.012) were associated with overall survival of patients with CRPC.COX multivariate analysis showed that baseline PSA at diagnosis (x2 =4.257,P =0.039),number of chemotherapy cycles (x2 =6.245,P =0.017),distant metastases (x2 =5.122,P =0.028) and serum Cys C before chemotherapy (x2 =8.172,P =0.004) were independent risk factors of overall survival of patients with CRPC,especially serum Cys C before chemotherapy (HR =2.394).Conclusion The patients with high Cys C level have poor prognosis,and the pre-chemotherapy Cys C is an independent risk factor for prognosis of CRPC patients treated with docetaxel-based chemotherapy which can be used as an effective indicator to assess the prognosis of CRPC.

Objective To investigate the clinical efficacy of percutaneous transhepatic insertion of biliary stent (PTIBS) combined with radioactive seed implantation in treating malignant biliary obstruction. Methods A total of 38 patients with malignant biliary obstruction were enrolled in this study. Radioactive 125I seed was used, and each 125I seed was 4.5 mm in length and 0.8 mm in diameter. The 125I seeds were placed in a catheter to prepare the 125I seed- strip. PTCD was carried out first, then percutaneous catheterization was performed and a guide- wire was inserted through the catheter until it passed the obstructed biliary segment. The obstructed segment was dilated by a balloon - catheter, which was followed by PTIBS. An 8 - 10 F drainage - catheter was placed into the biliary duct through the stent. Finally, guided by fluoroscopy the catheter with the 125I seed- strip was inserted via the drainage- catheter to the area that was planned to be radiated. The external drainage- catheter was wrapped and fixed to the skin, or was imbedded under the skin. Results Of the 38 patients with malignant biliary obstruction, successful PTIBS combined with radioactive seed implantation was accomplished in 36 patients. After the treatment, the serum bilirubin level fell to normal or near normal range in all patients (P < 0.05). No obvious side effects were observed. Conclusion For the treatment of malignant biliary obstruction, percutaneous transhepatic insertion of biliary stent combined with radioactive 125I seed - strip implantation is a safe and effective method.

OBJECTIVE: To discuss the efficacy and safety of simultaneous bilateral endoscopic surgery (SBES) for bilateral upper urinary tract calculi, and to summarize the initial experience. METHODS: Patients diagnosed with bilateral upper urinary tract calculi who underwent SBES in the Department of Urology, Beijing Chao-Yang Hospital from January 2019 to January 2020 were enrolled retrospectively. The demographic and clinical data of the patients were recorded, and the operation status, stone free rate (SFR) and peri-operative complications were analyzed. The primary end point was SFR, and second end point was peri-operative complications. RESULTS: A total of 23 patients underwent SBES, of which SBES was completed in 19 patients (12 males, and 7 females). The mean age was (41.3±12.0) years. Fourteen patients underwent modified supine position surgery and 4 patients in prone split-leg position. There was no statistical difference in the demographic and baseline clinical data of the patients in different positions. One patient underwent right percutaneous nephrolithotomy (PCNL) and left endoscopic combined intra-renal surgery (ECIRS) in the prone split-leg position, while 18 patients received simul-taneous surgery with PCNL and contralateral retrograde intra-renal surgery (RIRS). The mean anesthesia and operation time was (128.7±26.5) min and (70.7±20.3) min, respectively, which was significantly longer in the patients with prone split-leg position than in the patients with modified supine position, anesthesia time in the patients with prone split-leg position and modified supine position: (148.4±20.4) min vs. (121.6±25.3) min, respectively, t=－2.121, P=0.049, while the operation time in the patients with prone split-leg position and modified supine position: (86.4±21.1) min vs. (65.1±17.4) min, respectively, t=－2.222, P=0.040. There was no significant difference between the two groups in indwelling of nephrostomy [prone split-leg position and modified supine position: (2.6±0.9) d vs. (2.1±1.0) d, respectively; t=－0.880, P=0.391] and the length of hospital stay [prone split-leg position and modified supine position: (6.0±2.7) d vs. (5.2±1.8) d, respectively; t=－0.731, P=0.475]. One month after the operation, the SFR was 78.9%, and 3 patients had minor peri-operative complications (Clavien-Dindo grades Ⅰ/Ⅱ) without any serious complications (Clavien-Dindo grades Ⅲ/Ⅳ/Ⅴ). CONCLUSION The simultaneous bilateral endoscopic surgery would decrease the operation time and anesthesia exposure under the premise of ensuring the SFR, which is helpful to reduce the risk of peri-operative complications, especially to the patients who can not tolerate the second-stage or long-time operation.
Adult ; Calcinosis/surgery* ; Endoscopy ; Female ; Humans ; Kidney Calculi ; Male ; Middle Aged ; Nephrolithotomy, Percutaneous ; Nephrostomy, Percutaneous ; Retrospective Studies ; Treatment Outcome ; Urologic Diseases/surgery*

Objective • To determine the effect of recombinant human amelogenin (rhAm)-loaded PCLA-PEG-PCLA hydrogels on cell proliferation, immigration, attachment and osteogenic differentiation of human periodontal ligament fibroblasts (HPDLFs). Methods • HPDLFs were obtained by tissue block method in vitro from extracted premolars and the 3rd-5th passages of HPDLFs were treated with DMEM medium (control group), 20 μg/mL rhAm (rhAm group) or rhAm-loaded PCLA-PEG-PCLA hydrogels (rhAm-loaded hydrogel group). Proliferation activity was measured by CCK-8, while cell migration was assayed both by wound-healing experiment in vitro and Transwell experiment. Cell attachment was measured by hemocytometer and observed by scanning electron microscope. Osteogenic differentiation was measured by real-time PCR, with ALP, Runx2, CEMP1 and CAP as the target genes. Results • RhAm-loaded PCLA-PEG-PCLA hydrogels had no significant effect on cell growth curve of HPDLFs, but promoted cell proliferation after 3 days (P<0.05). RhAm accelerated cell migration mostly both in wound-healing experiment and Transwell experiment, with rhAm-loaded hydrogels in the second place. RhAm-loaded hydrogels promoted cell attachment, and in the 4th hour the promotion was of statistic significance (P<0.05). Meanwhile cells of rhAm group and rhAm-loaded hydrogel group had a better stretch condition than control group under the scanning electron microscope. After culture with rhAm-loaded hydrogels, ALP, Runx2, CEMP1, and CAP mRNA were upregulated in different time points. Conclusion • Recombinant human amelogenin-loaded PCLA-PEG-PCLA hydrogels can significantly improve proliferation, attachment and osteogenic differentiation of HPDLFs, but has no effect on cell migration on a statistical scale.

Objective To explore the clinical outcome of improved technique of Gamma nail in the treatment of intertrochanteric hip fracture of the elderly patients. Methods From March 2002 to October 2006.39 patients with intertrochanteric hip fracture were operated by improved technique of Gam-ma nail.There were 18 males and 21 females at average age of75.7 years(67_98 years).There were 6 patients with type A1 fracture,24 with type A2 fracture and 9 with type A3 fracture according to AO/ASIF classification.Of all.36 patients(92.3%)had osteoporosis.The operation improvements included the following points:(1)The patients were placed at the lateral decubitus position with the fractured limb on the uppermost,with flexion of knee and hip of 60°.The normal hip and knee were flexed as possible.(2)One-off indirect traction reduction was used after general anesthesia. no requirement of continuous mechanical traction.(3)C-arm image intensifier was employed to obtain normal and lateral projections.Results Of all,35 patients were followed up for a mean period of3 years and 2 months, ranging from 6 months to 5 years and 2 months.Operation data showed incision length of(4.3±1.2)cm,mean opera-tion time of(46±10)minutes,intraoperative bleeding volume of(65±26)ml and intraoperative X-ray exposure of(3.0±2.1)times.Postoperative recovery data showed survival in one-year follow up,with ambulation time of(10.5±3.6)days and fracture union time of(10.9±2.1)weeks.Mean Parker's score wag(6.9±3.2)points 6 months after operation. Conclusions Improved technique of Gamma nail can shorten operation duration,reduce operative trauma and bleeding,reduce X-ray exposure and im-prove success rate of surgery.as facilitates early pest-operative recovery and reduces the perioperative mortality rate of the elderly.