Objective To investigate the early neurotoxicity of rotenone on dopaminergic neurons and explore an ideal tissue model. Methods A long-term midbrain slice culture system of SD pup was established according to the interface tissue culture method.After rotenone was added for some time,its toxic effects on the whole slices and the dopaminergic neurons were identified through the measurements of lactate dehydrogenase(LDH) released into the medium from the slices and dopamine(DA) content from the cultured tissue,as well as the observations of immunohistochemistry for tyrosine hydroxylase(TH). Results In those cultures exposed to rotenone for 24 h,the level of DA in tissue dramatically decreased with the concentrations rising.The processes of TH-positive neurons in slices demonstrated some morphological changes,such as appearance of string of beads,reduce of numbers and even disappearance.The content of dopamine in tissue was dominantly decreased with 5 nmol/L rotenone for 14 days,although its cellular morphology was not seen to change.Conclusion Long-time stable midbrain slice culture system has been set up successfully.The neurotoxicity of rotenone on the whole slices and dopaminergic neurons shows a dose-dependent manner.The functional damages on the neurons may be earlier than their morphological changes,of which the injury in the processes of neurons seems to be an early characteristic.

Stathmin is a novel member of microtubule-destabilizing proteins that play a critical role in the regulation of the dynamic equilibrium of microtubules during different phases of the cell cycle.The overexpression of stathmin was found in different type of cancer.Inhibition of stathmin expression in malignant cells may interfere with their orderly progression through the cell cycle.Overexpression of stathmin can affect the action of antimicrotuble drugs by markedly decreasing binding of paclitaxel,and increasing binding of Vinca alkaloids.In addition,stathmin provides an attractive molecular target for cancer therapy.It may be possible to combine adenovirus-mediated anti-stathmin ribozyme therapy with a chemotherapeutic agent such as taxol to obtain a more potent antiproliferative and antitumor effect.

Objective To investigate the effect of different antiplatelet or anticoagulation therapy on postoperative pocket hematoma after electrophysiological devices placements (EPD). Methods The clinic data of 410 patients who took anti-platelet or anticoagulation therapy and needed to be implanted EPD from February 2012 to February 2015 were selected. According to the type of therapy, patients were divided into 4 groups:dual anti-platelet drug (DAP) treatment group (DAP group, 114 cases), low-molecular-weight heparin (LMWH) bridging treatment group (LMWH group, 98 cases), aspirin (ASA) alone group (ASA group, 94 cases) and warfarin group (104 cases). The incidence of pocket hematoma after electrophysiological devices placements was observed. The risk factors of pocket hematoma were analyzed. Results The incidence of pocket hematoma was higher in LMWH group than that in the other 3 groups: 18.4% (18/98) vs. 4.4% (5/114), 3.2% (3/94) and 2.9% (3/104), and there was statistical difference (P<0.05). But there were no significant differences in the incidence of pocket hematoma among DAP group, ASA group and warfarin group (P>0.05). The multiple Logistic regression analysis revealed that LMWH bridging therapy was an independent risk factor for the development of pocket hematoma (OR=7.105, 95%CI 1.872-17.283). Conclusions LMWH bridging therapy can increase the risk of development of pocket hematomas after electrophysiological devices placement.

The tumor microenvironment is closely related to the occurrence and development of tumor. Hypoxia is considered to be one of the most important factors in tumor microenvironment.Formation of hypoxic microenvironment can be found in most of malignant tumors,which can inhibit the anti-tumor immune response. Recent studies have indicated that immunosuppressive cells,tumor stem cells and circulating tumor cells in hypoxic tumor microenvironment can mediate immune suppression and immune tolerance,and then promote development of tumor.The new immune therapy will focus on normalizing tumor vasculature,reconstructing the tumor microenvironment,avoiding immune suppression and averting tumor immune tolerance.

Objective To investigate the role of NFIC on the stimulation effects of cAMP-induced differentiation of stem cells from the apical papilla ( SCAPs) in vitro. Methods SCAPs isolated from dental papilla of human imma-ture third molars were cultured by enzyme digestion. SCAPs were transfected with lentivirus that overexpressed NF-IC gene ( ov-NFIC) or an empty vector ( LV-empty) and co-treatment with Forskolin. Mineralized nodule formation of each group was measured by alizarin red staining. Quantitative real-time reverse-transcription polymerase chain reaction was performed to test the expressions of RUNX2,ALP,OCN mRNA. Results Forskolin increased the ex-pression of Runx2, ALP, OCN mRNA as well as matrix mineralization in SCAPs, and the stimulation effects of For-skolin were enhanced by overexpressing NFIC gene. Conclusion The results indicate that NFIC can promote cAMP-induced differentiation of SCAPs.

Background Left ventricular hypertrophy(LVH) is a cardiovascular risk factor independent of the blood pressure. JAK/STAT pathway has been confirmed to participate in cardiac hypertrophy and hyperplasia. Our previous reports have shown that sodium tanshinone ⅡA sulfonate(STS) reversed LVH,inhibited the myocardial cells Ca2+ influx,lowered left ventricular myocardial tumor necrosis factor-?(TNF-?)and the proto-oncogene c-fos,Bcl-2,and p53 protein expression. Objective To study the effect of sodium tanshinone ⅡA sulfonate(STS) on JAK/STAT pathway in left ventricular hypertrophy(LVH) induced by abdominal aorta stenosis in rats. Methods Twenty-four 9-weeks-old rats submitted to abdominal aorta constriction,were randomized to receive STS 10 mg/(kg?d)(n=8)or sterilized distilled water (1 mL/d)(n=8),or valsartan 10 mg/(kg?d) by gavage(n=8),with age and sex matched sham operated rats(n=8) as control. HE,VG and immunohistonchemical staining were used to evaluate the myocardial fiber dimension(MFD). Expressions of JAK1 and STAT3 were assessed by using Western blot. Results Compared with the control group,pressure loaded rats had higher SBP[(117.3?8.3) vs LVH: (186.5?13.5)mmHg,P

Posterior capsular opacification (PCO) is the most common complication that leads to loss of vision after cataract surgery.Neodymium doped:Yttrium-Aluminum-Garnet (Nd:Yag) laser capsulotomy is a common treatment for PCO, but still associated with several complications.In the past decades, the prevention and treatment of PCO have always been a hot spot of research in ophthalmology.This review will address the advances in the prevention and treatment of PCO in the aspects of surgical techniques and types of intraocular lens (IOL).

BACKGROUND:Demineralized bone can be used as the scaffolds of osteoblasts,and body tissue developed immunologic rejection to demineralized bone.OBJECTIVE:To investigate the histological changes of cyclosporin A(CSA) effect on ossification of demineralized bone,in addition,to explore the feasibility of demineralized bone served as ideal available bone substitute material.DESIGN,TIME AND SETTING:The randomized control experiment of animals was performed at the Experimental Center of Second Hospital of Dalian Medical University between March 2007 and April 2008.MATERIALS:Sixteen New Zealand rabbits were divided into the control and experimental group of homogenic decalcified bone,control and experimental group of heterogenous decalcified bone.CSA was produced by Beijing Novartis Pharmaceutical Co.,Ltd.METHODS:Decalcified bone prepared from rabbits was served as homogenic decalcified bone,and decalcified bone prepared from dogs were served as heterogenous decalcified bone.Sixteen rabbits were randomly divided into 4 groups:the control and experimental group of homogenic decalcified bone,control and experimental group of heterogenous decalcified bone,with 4 rabbits in each group.Each rabbit was implanted with homogenic or heterogenous decalcified bone,respectively,2 samples per side.2 mg/kg CSA or 2 mg/kg placebo was intramuscular injected in the experimental or control groups for 4 weeks.Samples were examined by hematoxylin-eosin staining and light microscope.MAIN OUTCOME MEASURES:The histological observation of decalcified bone in each group.RESULTS:Homogenic allogeneic bone induced formation in all implants.CSA did not induce morphological changes of homogenic allogeneic bone.In the heterogenous decalcified bone treated group,at 4 weeks,there was no bone formation or chondrocytes production in the control group,but there was cartilage and bone formation in the experimental group.CONCLUSION:CSA did not alter the morphology of bone induction by homogenic allogeneic bone.Immunologic reactions may inhibit bone induction by heterogenous decalcified bone,which can be counteracted by treatment with CSA.CSA can increase the rate of nonunion or bone defect using heterogenous decalcified bone.

Objective To analyse the tongue characteristics of cancer patients during chemotherapy ,in order to guide the TCM treatment. Methods 42 patients' tongue figure was collected respectively before and after chemotherapy by Canon digital camera, then to analyse the characteristics. Results Purple tongue was the most common in tongue color, account for 38.10%;meanwhile the tongue with stasis patch or with toothmark were common in tongue shape, account for respectively 26.19% and 21.43%;white thick or greasy tongue fur was the most common, especially in the central of tongue. Conclusion Deficience of Qi and blood stasis syndrome is common in cancer patients after chemotherapy, it is helpful to provide tasis for treatment of tonifying Qi and activating blood during chemotherapy.

Objective:To study the direct effects of gradient concentration inteiferon-a(IFN-a) on lymphoma cells line Daudi and Jur-kat and a group of 15 cases refractory lymphoma. Methods: The effects of IFN-a on the growth of tumor cells were assayed by MTT, apoptosis were measured by flow cytometty, TUNEL and electron-microscope, 15 refractory lymphoma cases were treated by local injection of IFN-a combination chemotherapy.Results: Low-dose IFN-a did not have any significant effects on growth of Daudi and Jurkat cells, high-dose IFN-a (10 000U/ml) not only have significant anti-proliferative effects with dependence of time and dosage but also can induce apoptosis on both Daudi and Jurkat cells. 5 patients achieved a complete remission and 7 patients achieved a partial remission, the overall response rate was 80% .Conclusion:IFN-a( 10 000 U/ml) had significant anti-proliferative effects and inducing apoptosis on lymphoma cells.Local injection of IFN-a is one of effective therapy on refractory lymphoma.