Objective To investigate the role of central and peripheral sensitization in remifentanil-induced hyperalgesia in a rat model of inflammatory pain. Methods Twenty-one male SD rats weighing 200-300 g were used in this study. Inflammatory pain was induced by intraplantar injection of 1 % carrageenan 100 fd in the left hindpaw in all animals. The animals were then randomly divided into 3 groups ( n = 7 each): control group (group C) and two remifentanil groups (group R1 , R2) . In R1 and R2 groups remifentanil was infused iv at a rate of 10 and 30 μg-kg-1·min-2 respectively starting from 5 min before till 25 min after carrageenan injection, while in group C normal saline was infused iv instead of remifentanil. Bilateral paw withdrawal threshold to mechanical stimulation with von Frey filament (PWT) was measured before (baseline) and at 1 h, 3 h and 1-7 d after carrageenan injection. Bilateral paw withdrawal latency to noxious thermal stimuli (PWL) was measured before and at 2 h, 4 h and 1-7 d after carrageenan injection. The thickness of the plantar surface of left hindpaw was measured before and at 1 h, 4 h and 1-7 d after carrageenan injection. Results Bilateral PWT was significantly lower at day 1 after carrageenan injection in R, and R2 groups than in group C. The right PWT was significantly lower at 2 d and 4-7 d after carrageenan injection in group R2 than in group R, . There was no significant difference in PWL and thickness of the plantar surface of left hindpaw among the 3 groups. Conclusion Central sensitization is involved in developing and maintaining the remifentanil-induced hyperalgesia in a rat model of inflammatory pain, while peripheral sensitization is not.

Objective:To explore the role and mechanism of 4-1BBL and B7-1 molecules in the activation and proliferation of human peripheral blood T lymphocyte. Methods:T lymphocyte was purified by magnetic beads negative selecting. The proliferation of T cells in primary allogenic MLR was evaluated by using 3H-TdR incorporation; The immunophenotype of T cells was analyzed by FACS and the quantitative measurement of IL-2 in culture supernatant were performed by ELISA.Results:After negative selection, the purity of CD3+ T cells was over 90%; 4-1BBL and B7-1 molecules stably expressed on XG cells after 4-1BBL and B7-1 cDNA transfection; 4-1BBL or B7-1 gene transfected XG cells could more effectively mediate the activation, proliferation and IL-2 secretion of T cells than XG cells did, and the results also showed that the costimulatory molecules had a co-activating effect on T cells.Conclusion:Human multiple myeloma cells failed to induced antitumor immunoresponse because of the lack or weak expression of costimulatory molecules. The costimulatory molecules of 4-1BBL and B7-1 has a synthetic effect on endowing myeloma cells with enhancing the activation、proliferation and IL-2 secretion of T cells in vitro. [

Objective To explore the characteristics and influential factors of resilience in empty-nest elderly with mild cognitive impairment(MCI) living in the poor area.Methods A total of 1 188 empty-nest elderly in the poor area of Hunan was sampled,analysis of covariance (ANCOVA),path analysis was used to analyze the data which were investigated by the two questionnaires including Index of SRQS.Results The prevalence of MCI in these 1 188 empty-nest elderly in rural area was 37.6％.The empty nest elderly in MCI group reported low resilience scores than those in cognitive normal group((58.84t 11.53) vs (63.58± 11.62) ; P＜0.001).ANCOVA and path analysis indicated that direct influences of income (β=3.324),education level (β=2.041),MoCA score (β=0.281) while age had indirect influences on it(β=-0.173).Conclusion Resilience in empty-nest elderly with MCI is low.Cognitive function,income and education are the direct influencing factor for resilience of the empty-nest elderly in the rural area.

OBJECTIVE:To prepare and establish quality control for the compo und metronidazole hollow suppository.METHODS:The compound metronidazole hollow suppository was prepared with semisynthesis fatty acid glyceride as ground substance;The contents of metronidazole and ofloxacin were determined by dual-wave length K-ratio method and equivalent absorption dual-wave length method.RESULTS:The detecting concentration linear range of metronidazole and ofloxacin were6.0～18.0?g/ml and3.0～9.0?g/ml respectively,the average recovery were100.98%and99.56%(n=5)respectively,RSD were0.82%?0.80%respectively.CONCLUSION:This method is convenient,accurate and reproducible,which can be used for the quality control of compound metronidazole suppository.

Objective To study the clinical effect of orthopedic-orthodontic treatment in crossbite in deciduous dentition through cephalmetric analysis. Methods 12 children with crossbite in deciduous dentition were enrolled in treatment group. Control group included 8 patients with normal deciduous dentition. Modified reverse headgear was used in each patient in the treatment group. Orthodontic force was a-bout 2. 94-4. 90 N (300-500 g) , and the direction of force was under occlusion plane for 37 degree. Each patient wore reverse headgear for 10 hour per day. Orthodontic treatment lasted for 6 months, and then orthodontic treatment began at once. Orthodontic treatment was not over until crossbite was corrected. The cephalmetric change was compared between two groups before treatment (T1) , after orthopedic treatment (T2)and after orthodontic treatment (T3). The effect of orthopedic-orthodontic treatment was analyzed in two group. Results Crossbite was corrected successfully in all patients in the treatment group. After treatment, A point moved forward by 2. 8mm, Is-FHp increased 8. 38 mm, ＜SNA increased 2. 65, incisors in mandible moved backward a little bit. All these changes were statistical different as compared with those in the control group. Conclusion Skeletal and dental deformity are improved progressively after combined orthopedic-orthodontic treatment. It is recommended to perform orthopedic-orthodontic therapy in skeletal crossbite in deciduous dentition.

Objective To evaluate the role of spinal κ-opioid receptors in remifentanil-induced postoperative central sensitization in a rat model of incisional pain by in vivo electrophysiology.Methods Sixty adult male Sprague-Dawley rats in which intrathecal catheters were successfully implanted,weighing 230-270 g,were divided into 5 groups (n=12 each) using a random number table:control group (group C),incisional pain group (group I),remifentanil group (group R),remifentanil plus incisional pain group (group R+I),and κ-opioid receptor agonist U50488H group (group U).A 1 cm longitudinal incision was made through skin,fascia and muscle of the plantar aspect of the right hind paw in isofiurane-anesthetized rats to establish the model of incisional pain.Remifentanil was intravenously infused for 1 h at a rate of 10 μg · kg 1 · min-1 in group R.In group R+I,remifentanil was intravenously infused for 1 h at a rate of 10 μg · kg-1 · min 1,and the model of incisional pain was established at the same time.In group U,U50488H 10 μg/10μl was injected intrathecally,30 min later remifentanil was intravenously infused for 1 h at a rate of 10 μg · kg-1 · min-1,and the model of incisional pain was established.Six rats in each group were randomly selected,the mechanical pain threshold (MPT) was measured in bilateral hind paws before implanting intrathecal catheter (T0),before operation (T1),and at 1 h,4 h and 1,2 and 3 clays after operation (T2-6).Six rats in each group were randomly selected to record the C fiber-evoked filed potentials in the spinal dorsal horn from 60 min before administration or operation to 180 min after administration or operation,the long-term potentiation (LTP) induced was also recorded,and the area under the curve (AUC) of C-fiber-evoked field potentials was calculated.Results No LTP was recorded in C,I and U groups,and the LTP was recorded in R and R+I groups.Compared with group C,the MPT in bilateral hind paws at T5,6 was significantly decreased in group R,the MPT in ipsilateral hind paws at T2 6 was decreased in group I,the MPT in ipsilateral hind paws at T2-6 and in contralateral hind paws at T5,6 was decreased in group R+I,the MPT in ipsilateral hind paws at T2-4 was decreased in group U,and the AUC of C-fiber-evoked field potentials was increased in R and R+I groups (P＜0.05).Compared with group Ⅰ,the MPT in ipsilateral hind paws at T4-6 and in contralateral hind paws at T5,6 was significantly decreased,and the AUC of C-fiber-evoked field potentials was increased in group R+I (P＜0.05).Compared with group R+ I,the MPT in ipsilateral hind paws at T2-6 and in contralateral hind paws at T5,6 was significantly increased,and the AUC of C-fiber-evoked field potentials was decreased in group U (P＜0.05).Conclusion The results of in vivo electrophysiology confirm that inhibition of spinal κ-opioid receptor function mav be involved in the mechanism by which remifentanil induces postoperative central sensitization in a rat model of incisional pain.

OBJECTIVE:To systematically evaluate the efficacy and safety of glutathione (GSH) in preventing oxaliplatin-in-duced peripheral neurotoxicity(OIPN),and to provide evidence-based reference in the clinic. METHODS:Randomized controlled trials (RCTs) about therapeutic efficacy of GSH vs. placebo/no any measures (called placbo group) or other drug in preventing OIPN were retrieved from PubMed,EMBase,Cochrane library,CJFD,Wanfang database and VIP. Meta-analysis was performed with Rev Man 5.3 statistical software after data extraction and quality evaluation with Jadad scale. RESULTS:18 RCTs were in-cluded,involving 1200 patients. The results of Meta-analysis showed that:total incidence of oxaliplatin-induced chronic peripheral neurotoxicity (OICPN)[RR=0.71,95%CI(0.59,0.87),P<0.001] and the incidence of severe OICPN [RR=0.50,95%CI(0.42, 0.60),P<0.001] in GSH group were significantly lower than placebo group,with statistical significance;there was statistical signif-icance in the incidence of oxaliplatin-induced acute peripheral neurotoxicity(OIAPN)[RR=0.89,95%CI(0.72,1.09),P=0.25]. The incidence of severe OICPN in GSH group was significantly higher than mecobalamine group,with statistical significance [RR=2.06,95%CI(1.07,3.99),P=0.03]. There was no statistical significance in the incidence of OICPN[RR=1.38,95%CI(0.83,2.31), P=0.21] and severe OICPN [RR=1.91,95%CI(0.85,4.30),P=0.12] between GSH group and Ca+Mg mixture group. CONCLU-SIONS:GSH can effectively prevent the occurrence of OICPN,however,its therapeutic efficacy is equivalent to Ca+Mg mixture and inferior to mecobalamine in preventing severe OICPN.

ObjectiveTo investigate the clinical effect of pendulum and straight wire technology in patients with fully erupted second molar.MethodsPatients with Angle class Ⅱ malocclusion were chosen.Control group included patients without erupted second molar.Experimental group included patients with completely erupted second molar.Pendulums were used in two groups to distalize maxillary molars.Then straight wire orthodontic treatment had been performed until treatment was over.Cephalograms of each stage were analyzed.ResultsIn the experimental group,mesiobuccal cusp of first molar was distalized for 4.62 mm,geometric center was distalized for 3.75 mm,about 81 percent of the movement of mesiobuccal cusp.In control group,mesiobuccal cusp of first molar was dis talized for 5.78 mm,geometric center was distalized for 3.20 mm,about 55 percent of the movement of mesiobuccal cusp.It turned out first molar was distalized in both groups,but more rotation took place in control group than that in the experimental group.ConclusionsPendulum can distalize maxillary first and second molars in patients with completely erupted second molar.The pendulum and straight wire technology can treat these patients successfully.

Objective We evaluate if supplementary grading system can refine patient selection and accurately predict neurological outcome in BAVM. Methods We retrospectively study 221 BAVM patients who were treated micro?surgically by our hospital. The score of pre and post operation mRS and relative clinical, radiology data were collected. Two different logistic models (Spetzler-Martin, Supplementary Spetzler-Martin grading model) were constructed to com?pare the area under ROC. Results Some factors are significant different between worse outcome patients and good out?come patients:Non-hemorrhagic presentations prior surgery, AVM bigger than 3cm, diffuse shape of AVM and the elder patients. Predictive accuracy was higher for the supplementary model (ROC area, 0.91), than the Spetzler-Martin model (ROC area, 0.774). So the predictive accuracy of supplementary model was significantly better than that of the Spet?zler-Martin model (P=0.0362). Conclusions Supplementary Spetzler-Martin model can improve preoperative risk pre?diction and subgroup the patients more efficiently. When the score less than 5(including 5) in supplementary Spet?zler-Martin patients seem to have lower risk relative to surgery.

Objective To evaluate long term effect and related factors in patients with menorrhagia treated by microwave endometrial ablation(MEA).Methods Total of 334 women with menorrhagla were treated hy MEA,the range of age was from 29 to 59 years old.Among them,59 cases were complicated by adenomyosis.All the patients were followed up on the change of menstrual cycle.the amount of flow,improvement of anaemia and complication.Fifty-three women underwent outpatient diagnostic hysteroscopy,the biopsy tissue was taken from the endometrium for histopathological examination.The mean duration of follow-up was 64.7 months (3-96 months).Results The overall curative rate wag 91.3%(305/334),of which amenorrhea rate was 49.7%(166/334),menstruation reduction rate was 41.6%(139/334):71.1%(140/197) of the cases who previously had dysmenorrhea had relieved their pelvic pain and the satisfactory rate was 91.9%(307/334).Among patients＞40 years,92.9%(196/211) of operation effective rate,93.8% (198/211) of satisfactory rate and 64.9% (137/211) of amenorrhea rate were obtained.while patients≤40 years,88.6%(109/123) of operation effective rate,88.6%(109/123) of satisfactory rate and 23.6%(29/123) of amenorrhea rate were obtained.There was significant difierence in rate of operation effectiveness,satisfaction and amenorrhea (P＜0.05).Forty-two cases required subsequent treatment due to recurrence,of which 9 cases were given by secondary MEA and 33 cases (9.9%、33/334) underwent hysterectomy indicated by frequent menorrhagla,adenomyosis or leiomyoma.A completely destroyed endometrium was observed by hysteroscopy after MEA,pathologic characteristics of MEA showed two zones of necrotic tissue:the inner zone was coagulation necrosis and the outer zone of necrosis was hypocellular hyalinized myometrium.Conclusions MEA is the safe and efficacious management to treat menorrhagia.Incomplete removal of endometrium was the major reason resulting in postoperative recurrence.Young age and complicated with adenomysis were the main factors influencing long term clinical effect of MEA.