BACKGROUND:It is a mature technology to culture MC3T3-E1 cels in the self-assembling peptide hydrogel, RADA16-NBD. Moreover, it is confirmed that a variety of metal ions, such as Fe, Cu, Zn, Mn, are involved in normal bone metabolism.
OBJECTIVE:To observe the effect of Cu2+and Fe3+ on the proliferation and differentiation of MC3T3-E1 cels cultured in the self-assembling peptide hydrogel, RADA16-NBD.
METHODS: Osteoblasts cultured with RADA16-NBD were divided into three groups and respectively cultured in culture medium containing Cu2+, Fe3+ or serum-free medium (control group), respectively. After 24, 48 and 72 hours, cel proliferation was detected by cel counting kit-8. After 1, 3, 5 days, alkaline phosphatase activity was detected. At 21 days, formation of calcified nodules was observed. Cel migration ability of cels was observed at 24 hours of Transwil chamber culture.
RESULTS AND CONCLUSION:Compared with the control group, the proliferative ability of cels cultured in the Cu2+, Fe3+ groups was significantly higher (P < 0.05,P < 0.01). At 72 hours of culture, there was no difference in the cel proliferation among the three groups. At 1, 3, 5 days of culture, the alkaline phosphatase activity in the Cu2+, Fe3+ groups was significantly higher than that in the control group (P < 0.05); while at 3 and 5 days of culture, the alkaline phosphatase activity in the Cu2+ group was significantly higher than that in the Fe3+ group (P < 0.05). In addition, the number of migrated cels was higher in the Cu2+ group than the Fe3+ group (P < 0.05). These findings indicate that both Cu2+ and Fe3+, especialy the former one, can promote MC3T3-E1 cel proliferation, differentiation and migration.

OBJECTIVE To study the value of the application of the neutrophil volume distribution width(NDW) in diagnosing acute bacterial infection generated by Coulter LH750 hematology analyzer.METHODS To do whole blood cell analysis of 80 blood samples of the bacteremic patients.Observed the white blood cell counts(WBC),the percentages of neutrophils,the value of the NDW and microscopic examination,to compare them with 50 controls.RESULTS A significant increase in the NDW was observed in the bacteremic patients compared with the controls(P

Acupuncture Points ; Acupuncture Therapy ; instrumentation ; Adult ; Combined Modality Therapy ; Female ; Humans ; Middle Aged ; Moxibustion ; Needles ; Postoperative Complications ; etiology ; physiopathology ; therapy ; Scalp ; Treatment Outcome ; Urinary Retention ; etiology ; physiopathology ; therapy ; Urination ; Uterine Cervical Neoplasms ; surgery

The current difference between male and female rabbit ventricular myocytes was investigated for elucidating the mechanism of longer QT interval and higher incidence of drug-associated torsade de pointes in female rabbits than in male rabbits. Whole cell patch clamp technique was used to record APD, Ito, IK,tail, IK1 and ICa,L of myocytes from left ventricular apex. There was no difference in the membrane capacitance between male and female rabbit myocytes. APD90 was longer in female rabbits (560.4+/-26.5 ms, n=15) than in male ones (489.0+/-20.7 ms, n = 14), P<0. 05. In female rabbit myocytes, IKtail, Ito, IK1 and ICa,L were 0.71+/-0.05 pA/pF (n=17), 8.28+/-1.03 pA/pF (n=18), 24.5+/-3.6 pA/pF (n=12) and 9.0+/-2.3 pA/pF (n=15) respectively. In male rabbit myocytes, they were 0.84+/-0.07 pA/pF (n=18), 8.60+/-1.20 pA/pF (n=18), 25.9+/-4.5 pA/pF (n=14) and 9.3+2.6 pA/pF (n=16) respectively. IK,tail in female rabbits was significantly lower than that of male rabbits (P<0.05), but there was no difference in Ito,IK1 and ICa.L between male rabbits and female rabbits (P>0.05). The lower IK.tail of female rabbit myocytes may contribute to the longer repolarization and the higher incidence of drug-associated torsade de pointes.
Action Potentials/physiology ; Heart Ventricles/*physiology ; Myocytes, Cardiac/*physiology ; Patch-Clamp Techniques ; Potassium Channels/physiology ; Sex Characteristics ; Torsades de Pointes/chemically induced

Objective To evaluate the clinical application of computer-aided electromagnetic imaging navigation in nasal endoscopic surgery.Methods Twenty-two cases of nasal endoscopic surgery with intraoperative imaging navigation were retrospectively reviewed,including 16 cases of sinusitis with or without polyp;5 cases of nasal inverting papilloma; 1 case of maxillary capillary hemangioma.All cases were operated with computer-aided electromagentic imaging navigation and nasal endoscope.Results The preoperative preparing time would take 4-10 minutes.In 22 cases,the localization accuracy between 3-D image landmarks of navigation system and actual anatomical landmarks was less than 1 mm.The optic nerve and other anatomical landmarks could be orientated accurately in intraoperative procedures.No complication occurred.Conclusions Nasal endoscope combined with computer-aided electromagnetic imaging navigation provides accurate anatomical localization of nasal cavity,sinuses and anterior skull base.It could improve the effectiveness and decrease surgical complications,especially in complicated cases.

Objective To explore the relationship between ULI43 sequence variability and clini-cal disease. Methods UL143 from samples obtained from suspected congenitally human cytomegalovirus (HCMV) infected symptomatic infants were PCR amplified and sequenced. Results There were not too much sequence variability of UL143 compared with Toledo. But no one was completely identical to Toledo, and all UL143 ORFs were shorter than Toledo for frame-shift. Conclusion HCMV-UL143 existed in moat of low passage isolates and sequences were variable. No obvious linkage was observed between UL143 poly-morphisms and outcome of suspected congenital HCMV infection.

BACKGROUND:Ligustrazine has been shown to restore the function of the femoral headviathe revascularization, increased blood flow, theabsorption ofnecroticbone, and bone regeneration. OBJECTIVE:To study the effects of ligustrazine on remodeling of periodontal tissues and the expression of osteoprotegerin in the maintenance phase in rats with orthodontic tooth movement. METHODS:Thirty-two healthy male Wistar rats were included and equaly randomized into four groups. Maxilary left first molar mesialization was performed through traction of 50 g force for 21 days to establish the rat model of tooth movement. 5, 10, 15 mg/L ligustrazine (50 μL) were localy injected into the first molar periosteum in model rats on the day before removing the orthodontic forcing device. Same volume of saline was injected in the control group. The injection was administered every other day. At 1 and 4 weeks after injection, the distance of tooth movement, the recurrence distances and percentage were determined and calculated. The pathological changes in periodontal tissues were observed by immunohistochemistry and hematoxylin-eosin staining. The width ofthe parodontium and number of osteoblasts were observed under an optical microscope. RESULTS AND CONCLUSION:The recurrence distance inthecontrol group was increased compared withtheexperimental group, while the number of osteoblasts and osteoprotegerin immunoreactivity were decreased. Good width of the parodontium and smal recurrence trend were found in 10mg/L ligustrazine group. These findings indicate that ligustrazine promotes the proliferation of osteoblasts and enhances the expression of osteoprotegerin, which is beneficial to the retention of teeth after orthodontic surgery.

Objective To investigate the factors affecting the survival and prognosis of patients with stage Ⅲ～ Ⅳgastric cancers.Methods A total of 156 cases of Ⅲ ～ Ⅳ gastric cancer was studied retrospectively from September 1,2006 to December 31,2012.Kaplan-Meier analysis,Log-rank univariate analysis,Cox proportional hazards model analysis were used to analyze survival and prognostic factors.Results Twelve cases were lost,to the end of the follow-up,22 cases were alive.The median survival time was 29.3 months.1-year,3-year,and 5-year overall survival rates were 83.3％,37.8％,and 21.2％,respectively.Univariate analysis showed that tumor size,tumor node metastasis (TNM) staging,curative resection,hyperthermic intraperitoneal perfusion chemotherapy (HIPEC),and postoperative chemotherapy were correlated with prognosis (P ＜0.05 for all).Multivariate analysis showed that TNM staging,curative resection,HIPEC,and postoperative chemotherapy were independent prognostic factors (P ＜ 0.01 for all).Conclusions TNM staging,curative resection,hyperthermic intraperitoneal perfusion chemotherapy and postoperative chemotherapy are the independent factors affecting the prognosis of stage Ⅲ～ Ⅳ gastric cancer after resection.Hyperthermic intraperitoneal perfusion chemotherapy and postoperative chemotherapy can improve their survival.

Objective To explore how neutrophil-lymphocyte ratio (NLR) is related with inflammation and atherosclerosis,and the role of NLR in hospitalization in maintenance hemodialysis (MHD) patients.Methods MHD patients treated in hemodialysis center of Sichuan Provincial People's Hospital from June till November 2013 were enrolled.Patients with severe infection,cardiovascular events and malignant carcinoma were excluded.NLR was determined from complete blood count differential.Clinical parameters such as serum albumin,lipids,intact parathormone,ferritin,C-reactive protein (CRP),25-(OH) vitamin D,interleukin-6 (IL-6) and alkaline phosphatase (ALP) were collected.Pulse wave velocity (PWV) and ankle-brachial index (ABI) were used to evaluate the arterial stiffness.Spearman analysis was used to evaluate the relationship between NLR and these parameters.All patients were divided into low NLR group (NLR≤3.25) and high NLR group (NLR ＞3.25) on the median NLR,and their differences in these indexes were analyzed.During the one-year follow-up,the reasons and rates of hospitalization and survival were analyzed.Results One hundred and thirteen MHD patients including 58 males and 55 females were enrolled with (69±49) dialysis age and (54± 15) average age.(1) The NLR was significantly correlated with whole blood count (WBC,r=0.538,P＜ 0.001),ABIL (r=0.201,P=0.033),ABIR (r=0.235,P=0.012) and total cholesterol (TC,r=-0.414,P＜ 0.001) and low-density lipoprotein cholesterol (LDL-C,r=-0.378,P ＜ 0.001).(2) Low NLR patients had increased TC,LDL-C and IL-6 as compare with high NLR patients,however decreased ABIL and ABIR (all P ＜ 0.05).(3) Forty one patients were hospitalized 63 times during the follow-up period.Annual hospitalization rate was 558/1000 and the mortality rate was 17.7/1000.(4)NLR in patients at least hospitalized once a year was significantly lower than in patients without hospitalization,while ALP was higher (all P ＜ 0.05).Compared with those in other patients,NLR and hemoglobin (Hb) were significantly lower in patients with hospitalization due to infection,while ALP was higher (all P ＜ 0.05).Conclusions NLR is related with WBC,ABI,TC and LDL-C in MHDpatients.Lower NLR may indicate high risk for cardiovascular,atherosclerosis and hospitalization,probably different form non-MHD patients,which needs more studies to verify.

BACKGROUND:Bone tissue transplantation or osteogenic material fil ing is after used for bone defect repair. To remove autologous bone tissues can lead to additional damage and secondary deformity, therefore, it is extremely urgent to search for a new osteogenic material. OBJECTIVE:To construct the porousβ-tricalcium phosphate (β-TCP)/col agen scaffold modified with human bone morphogenetic protein 2 (hBMP2) gene, and to observe its effects on differentiation of MC3T3-E1 cel lines. METHODS:The porousβ-TCP/col agen scaffold modified with hBMP2 gene was prepared. Then in vitro culture system of MC3T3-E1 cel lines with composite scaffold was established. There were scaffold and plate groups, and each group was divided into two subgroups according to the different concentrations of plasmid. Samples were col ected and observed morphological y by scanning electron microscope and light microscope after complex culture. After 1, 3, 7 and 14 days of induction, calcium nodules were observed through alizarin red staining, the cel cycle was detected by real-time PCR, and expressions ofαI-chain col agen type I gene, Osterix and bone sialoprotein were observed. RESULTS AND CONCLUSION:The number of cel s adhered, differentated and distributed on the composite scaffold was significantly higher than that of the single scaffold (P<0.05). Alizarin red staining and real-time PCR detection showed that the osteogenesis ability of MC3T3-E1 cel lines in the scaffold group was stronger than that in the plate group. To conclude, the porousβ-TCP/col agen scaffold modified with hBMP2 gene is an appropriate candidate for bone defect repair.