Objective To investigate the correlation between Gab2 expression and platinum drugs chemotherapy resistance by detecting the expression of Gab2 in ovarian cancer.Methods Immunohistochemical and Western blotting techniques were used to detect the expression of Gab2 in 107 specimens of serous ovarian tumor tissue and 12 specimens of normal ovarian tissues resected during bladder cancer radical operation in the department of gynaecology of our hospital from January 2011 to June 2015.The correlation between Gab2 expression with clinical stage and effect of combined chemotherapy based on platinum drugs was analyzed.Results The Gab2 expression level in ovarian cancer tissue was significantly higher than that in normal ovarian tissue,moreover had a relation with the FIGO clinical stage,the expression level of Gab2 increased with the increase of clinical stage,the difference was statistically significant (P<0.05);61 cases were sensitive to chemotherapy,46 cases were resistant to chemotherapy,the Gab2 expression level in the patients with chemotherapy resistance was significantly higher than that in the patients with chemotherapy sensitivity,the difference was statistically significant (P<0.05).Conclusion Gab2 may become one of effective indexes for predicting platinum drugs chemotherapy sensitivity.

Adult ; Air Pollution, Indoor ; adverse effects ; Benzene ; adverse effects ; Control Groups ; Female ; Humans ; Leukocyte Count ; Male ; Middle Aged ; Occupational Exposure ; adverse effects ; Paint

Arterio-Arterial Fistula ; complications ; Coronary Aneurysm ; complications ; Heart Ventricles ; Humans ; Male ; Middle Aged

Objective It has been shown that adult brain is still capable of neurogenesis which can beinhibited by activation of NMDA receptor.Since lidocaine can inhibit NMDA-mediated excitatoryueurotransmission,we aimed to investigate the interaction between lidocaine and NMDA on the proliferation ofpheochromocytoma cells which are used as a model for central neuronal cells.Methods The PC 12 ceils culturedin vitro were divided into 6 groups:(1)control group,cultured in normal DMEM complete nutrient liquidmedium;(2)NMDA group,cultured in DMEM containing 400 ?mol?L~(-1) NMDA;(3)-(6)lidocaine group,cultured in DMEM medium containing 400 ?mol L~(-1) NMDA and 10,10~2,10~3 or 10~4 ?mol?L~(-1) lidocaine.After 5day incubation,the cell cycle progression was analysed using a flow cytometer.The percentage of cells in S-phase(S-phase fraction,SPF)was determined and proliferation activity(cells in S+G_2 phase/cells in M-phase)wascalculated.Results NMDA 400 ?mol?L~(-1) significantly decreased the SPF of PC12 cells in group 2 compared tocontrol group,and proliferation activity(S+G_2 phase/M-phase)was also significantly reduced(P0.05).The SPF of PC12 cell ingroup 3 and 6(10 and 10~4 ?mol?L~(-1) lidocaine)was also significantly higher than that in NMDA group butsignificantly lower than that in control group.Conclusion NMDA inhibits proliferation of PC12 cells whilelidocaine can antagonize the inhibitory effect of NMDA and promotes proliferation and differentiation of centralneuronal cells.

Objective To investigate the therapeutic effect of intracerebral transplantation of mesenchymal stem cells(MSCs) derived from human umbilical cord blood(UCB) on hypoxic-ischemic brain damage(HIBD) in neonatal rat.Methods Twenty samples of human UCB were collected from healthy full-term newborns.MSCs were isolated from human UCB by density gradient centrifugation and purified by adhere cell selection method.For transplantation,P3 human UCB-derived MSCs were labeled by the 5-bromo-2-deoxyuridine (BrdU).Thirty SD rats of 7 d were built for neonatal HIBD model.One rat died and others were divided into transplant group(n=18) and control group(n=11).At the third day after building models,human UCB-derived MSCs were injected into left cortex in transplant group,while PBS of the same volume was injected into the same site in control group at the same time.The seventh day after transplantation,6 rats of transplant group were sacrificed to prepare brain tissue sections.The survival,migration and differentiation of the transplanted cells were investigated by brain tissue immunohistochemical analysis,and nervous function of 2 groups were evaluated by modified neurological severity score(mNSS) on the first,7th,14th,21th and 28th day after transplantation.Results MSCs were isolated from 5 of 20 human UCB samples.Immunocytochemical analysis of brain tissue showed that the transplanted human UCB-derived MSCs could survive and migrate around by the center of transplant site.There were (12.67?2.73)% of MSCs differentiated into astrocyte-like cells.mNSS showed that the score of transplant group was lower than that of control group on the first,7th,14th,21th and 28th day,and the differences of score points between 2 groups on the 14th,21th and 28thday were statistically significant(Pa

The deubiquitinating enzyme ubiquitin specific peptidase 15 (USP15) is regarded as a regulator of TGFβ signaling pathway. This process depends on Smad7, the inhibitory factor of the TGFβ signal, and type I TGFβ receptor (TβR-I), one of the receptors of TGFβ. The expression level of USP15 seems to play vital roles in the pathogenesis of many neoplasms, but so far there has been no report about USP15 in psoriasis. In this study, immunohistochemical staining of USP15, TβR-I and Smad7 was performed in 30 paraffin-embedded psoriasis specimens and 10 normal specimens to investigate the expression of USP15, TβR-I and Smad7 in psoriasis and to explore the relevance among them. And USP15 small interfering RNA (USP15 siRNA) was used to transfect Hacat cells to detect the mRNA expression of TβR-I and Smad7. Of 30 cases of psoriasis in active stage, 28, 24 and 26 cases were positive for USP15, TβR-I and Smad7 staining, respectively. The positive rates of USP15 and Smad7 were significantly higher in psoriasis specimens than in normal skin specimens (44.1%±26.0% vs. 6.1%±6.6%, 47.2%±27.1% vs. 6.6%±7.1%), and positive rate of TβR-I (20.3%±22.2%) in psoriasis was lower than that in normal skin specimens (46.7%±18.2%). There was a significant positive correlation between USP15 and Smad7 expression, and significant negative correlations between USP15 and TβR-expression, an I d between TβR- and Smad7 expression I in psoriasis. After transfection of USP15 siRNA in Hacat cells, the expression of TβR-mRNA was up I -regulated and that of Smad7 was down-regulated. It is concluded that USP15 may play a role in the pathogenesis of psoriasis through regulating the TβR-I/Smad7 pathway and there may be other cell signaling pathways interacting with USP15 to take part in the development of psoriasis.

Objective To investigate the effect of the calmodulin kinase Ⅱ Inhibitor KN-93 on L-typecalcium current(ICa,L)and intracellular calcium concentration([Ca2+]i)in hypertrophic cardiac myocytes.Methods Forty-eight female New Zealand white rabbits were randomized(random number)into four groups(12 animals in each group):the sham operation group(sham group),the left ventricular hypertrophy group(LVH group),the myocardial hypertrophy + KN-93 group(KN-93 group),and the myocardial hypertrophy + KN-92 group(KN-92 group).Myocardial hypertrophy in the rabbits was established by coarctation of the abdominal aorta.In the sham group,the abdominal aorta was dissociated without coarctation.Eight weeks after coarctation,single ventricular myocytes were isolated by enzymaticdissociation,and ICa,L was recorded using perforated-patch recording(PPR)techniques.[Ca2+]i was measured using single-cell calcium imaging with the fluorescence calcium indicator dye fura-2/AM.Results Cardiac hypertrophy was successfully established after 8 weeks of coarctation of the abdominal aorta.The peak ICa,L in the LVH group and the sham group was(1.38 ± 0.3)nA and(0.87 ± 0.1)nA at 0 mV,respectively(P ＜0.01,n =12).There was no significant difference in Ica,L density between the LVH group and the sham group[(6.7 ±1.0)pA/pF vs.(6.3±0.7)pA/pF; P≥0.05,n=12].The addition of either KN-92(0.5 μmol/L)or KN-93(0.5 μmol/L)to the perfusing solution caused a modest steady-state inhibition of peak ICaL(9.4％ ±2.8％,KN-92; 10.5％ ±3％,KN-93)(P≥0.05,n =12)at 0 mV.However,at a higher concentration(1 μmol/L),KN-93 more potently inhibited peak ICa,L(40％±4.9％)compared to KN-92(13.4％ ± 3.7％ ; P ＜ 0.01,n =12).Resting[Ca2+]i levels in fura-2-loaded myocytes isolated from the sham,LVH,KN-92,and KN-93 groups were(98 ± 12.3)nmol/L,(154 ± 26.2)nmol/L,(147 ± 29.6)nmol/L,and(108 ± 21.2)nmol/L,respectively.Conclusions The CaMK Ⅱ specific inhibitor,KN-93,can effectively block ICa,L and reduce intracellular calcium overload in hypertrophic cardiac myocytes.This action may account for the antiarrhythmic effect of KN-93 in hypertrophic ventricular myocardium.

Polyamidoamine-polyethylene glycol (PAMAM-PEG) copolymers were synthesized using IPDI as coupling reagent by two-step method. The copolymers were characterized by IR spectrum and 1H NMR spectrum, and the PEG conjugating ratios of the copolymers were calculated equal to 10% and 30% separately. MTT assay indicated that after PEGylation a lower cytotoxicity of the copolymers could be found, and with increasing PEG conjugating ratio the cytotoxicity decreased obviously. Agarose gel retardation assay demonstrated that PAMAM-PEG copolymers could be combined with DNA and PAMAM-PEG/DNA complexes were prepared by self-assembly. DLS measurement showed that when N/P > or = 50, the particle size of copolymer/ gene complexes was in a range of 150-200 nm, and the zeta potential was in a range of 10-25 mV. In vitro gene transfection illustrated that when N/P < or = 50, the gene transfection efficiency of PAMAM-PEG copolymers was a little less than that of PAMAM-G5, but the transfection efficiency can be raised by increasing N/P ratio or transfection time. Considering both cytotoxicity and transfection efficiency aspects PAMAM-PEG-13 was more effect than PAMAM-PEG-39 in PEGylation.

The source impedance of the power circuit in the x-ray machine is analyzed in the paper and based on the voltage drop generated by the impedance, the cross-sectional area of the cable is calculated. In the end, the cross-sectional areas of the cables, corresponding to their respective distances between the transformers and the switchboards are given.
Electric Power Supplies ; Radiography ; instrumentation

OBJECTIVETo explore clinical characteristics and treatment of posterior Pilon fracture.

METHODSFrom January 2011 to January 2013,18 patients with posterior Pilon fracures were treated. Among them, 13 were male and 5 were female, aged from 22 to 63 years old, with an average age of 46. All the patients were closed fractures. Open reduction and internal fixation were performed after swelling subsided, lateral malleolous and posterior Pilon fracture were exposured through lateral approach on healthy side, plates were used to fixed,screws or small plates were used to fix the posterior prominence of medial malleolus after changed to supine position. AOFAS scoring were applied to evaulate clinical effects.

RESULTSAll patients were followed up with an average of 22(ranged, 12 to 48)months. All patients obtained satisfactory reset except one patient. All factures were recovered well with an average healing of 11 weeks. According to AOFAS score at the final following up, 7 cases were excellent,2 cases were moderate, and the total score was 86.8±9.2.

CONCLUSIONPosterior Pilon fracture is not rare in clinical, its mechanism of injury, traumatic anatomy, surgical procedure and prognosis are different from that of classical ankle fracture and Pilon fracture.

Adult ; Ankle Injuries ; surgery ; Female ; Fracture Fixation, Internal ; Humans ; Male ; Middle Aged ; Retrospective Studies ; Tibial Fractures ; surgery ; Treatment Outcome ; Young Adult