The antagonistic effects of L-THP, Ver and Pap to contraction of isolated guinea pig trachea preparations induced by BaCl2 10-3mol/L ,KC1 3?10-2mol/L, 5-HT 2?10-5mol/L, Ach 2?10-5mol/L and His 2? 10-5mol/L were studied.The antagonistic effects of L-THP were different from Ver and Pap. The IC50 value of L-THP for contraction induced by BaCl2, KC1, 5-HT and His was 3 .5? 10-5mol/L , 4.5 ? 10-5mol/L , 2.5?10-3 mol/L and 8.9? 10-5mol/L respectively. It was showed that sensibility of several agonists to inhibition by L-THP was correlated with dependence of extracellular Ca2+. The potencies of L-THP on anti-KCl and anti-5-HT actions were similar. The results suggested that LTHP possesses anti-calcium and anti-5-HT action on guinea pig trachea.

Objective To observe the factors affecting inadequate ST-segment resolution in patients with acute ST-segment elevation myocardial infarction after emergency percutaneous coronary intervention (PCI). Methods The patients with acute ST-segment elevation myocardial infarction undergoing emergency PCI were enrolled for study. According to the ratio of ST-segment resolution, 186 cases were divided into inadequate ST-segment resolution group (54 cases) and relatively adequate ST-segment resolution (132 cases). Clinical data of two groups were compared. The single factor and multiple Logistic regression analysis were performed to determine the factors influencing inadequate ST-segment resolution. Results Pre-infarction angina was protective factor of inadequate ST-segment resolution after emergency PCI (OR=0.361, 95%CI 0.131-0.994, P<0.05). Anterior myocardial infarction, attack-to-balloon time, Killip classification and white blood cell counts were risk factors of inadequate ST-segment resolution (OR=2.389, 95%CI 1.194-4.781;OR=1.655, 95% CI 1.082-2.532; OR=1.319, 95% CI 1.026-1.695; OR=1.184, 95% CI 1.004-1.396, P<0.05). Conclusions Patients with pre-infarction angina could reduce the risk of inadequate ST-segment resolution after PCI. Patients with anterior myocardial infarction,long attack-to-balloon time, Killip classification≥2 and high blood cell counts could increase the risk of inadequate ST-segment resolution, and earlier and more active clinical intervention should be taken.

Objective To explore the dose-effect,time-effect and safety of alteplase in the treatment of acute cerebral infarction.Methods One hundred and ten patients with acute cerebral infarction were selected,among whom 50 patients whose time window ≤3.0 h were divided into group A and group B by random digits table method with 25 cases each,and 60 patients whose time window 3.1-4.5 h were divided into group C and group D by random digits table method with 30 cases each.The patients in group A and group C received alteplase 0.6 mg/kg (maximum dose 60 mg) intravenous thrombolysis;the patients in group B and group D received alteplase 0.9 mg/kg (maximum dose 90 mg) intravenous thrombolysis.The national institutes of health stroke scale (NIHSS) scores before treatment and 1 h,24 h,7 d,30 d and 90 d after treatment were observed in the 4 groups.The therapeutic effect,complication incidence and fatality rate were compared.The prognosis was estimated by modified Rankin scale (mRS) score 90 d after treatment.Results The NIHSS scores 1 h,24 h,7 d,30 d and 90 d after treatment were significantly lower than those before treatment in the 4 groups,and there were statistical differences (P ＜ 0.05).The NIHSS score decreased significantly with time.There were no statistical differences in NIHSS score between group A and group B,group C and group D.There were no statistical differences in complication incidence and fatality rate 90 d aftcr treatment in group A and group D compared with group B and group C (P＞ 0.05).The rate of eusemia in group A was 76.00％ (19/25),in group B was 64.00％ (16/25),in group C was 43.33％ (13/30),and in group D was 53.33％ (16/30).And there were no statistical differences between group A and group B (x2 =0.620,P ＞0.05),and between group C and group D (x2 =0.069,P＞ 0.05).Conclusions The low dose alteplase is also effective and safe to acute cerebral infarction patients at time window ≤ 3 h.It is also effective and safe to acute cerebral infarction patients at time window 3.0-4.5 h at standard dose.

Hemodynamic study of L-THP in anaesthetized rats showed that 6 mg/kg iv decreased only blood pressure (BP) significantly, and decreased left ventricular pressure ( LVP ) temporarily. At the dose of 18 mg/kg, L-THP lowered the BP, LVP, ? ( dP/dt ) max, ( dP/dt ) P-1 and HR. But the degrees o?diminutions of BP were greater than that of cardiac contractility. The inhibitory percentage of L-THP on DAP was greater than that of SAP. In addition, the extent of decrease of DAP was shown dose dependently. The results suggest that L-THP reduces the peripheral vessel resistance, and it inhibits the cardiac contractibility in high dosage.

Objective:To investigate the role of heme oxygenase-1(HO-1) in molecular mechanism of experimental allergic encephalomyelitis (EAE). Methods: Seventy-eight healthy female Wistar rats were randomly divided into 3 groups(n=26): rats in control group received no treatment; rats in EAE group were induced with complete Freund's adjuvant and Guinea pig spinal cord homogenate(CFA-GPSCH); and rats in pyrrolidine-dithiocharbamate (PDTC) group received PDTC (100 mg/kg), a specific inhibitor of NF-kB, 1 h before and after(once a day for 7 d) CFA-GPSCH treatment. HO-1 mRNA expression were analyzed with reverse transcription polymerase chain reaction(RT-PCR) on 1 d,7 d,14 d,and 21 d after EAE induction, respectively. The relationship between HO-1 and symptoms of EAE was also investigated. Results: The expression of HO-1 mRNA was very low in the brains of the control group (0.27?0.05), whereas enhanced gradually with onset and development of EAE in EAE group, peaked on d 7 (1.11?0.12), kept at a high level till d 14(1.06?0.18) and decreased on d 21 (0.37?0.1). HO-1 mRNA expression change was in parallel with severities of EAE. In PDTC group,the EAE symptoms were mitigated markedly and the expression of HO-1 mRNA reduced noticeably compared with that of EAE group. Conclusion: Brain HO-1 mRNA expression may play an important role in the pathogenesis of EAE,and application of some inhibitors of NF-kB may be one of the potential therapies for prevention and treatment of EAE.

OBJECTIVEThe purpose of this study is to assess the height and width of mandibular cross-sections and the thickness of cortical bone for young females in different vertical skeletal pattern by cone beam CT (CBCT) and determine the characteristics and differences of mandible among different vertical skeletal patterns.

METHODSA total of 64 females, aged from 19 to 40 years old, were enrolled from Department of Orthodontics of School of Stomatology of Shandong University. After examination with CBCT scan, they were divided into 3 groups according to the vertical skeletal patterns (14 in low-angle group, 31 in average-angle group and 19 in high-angle group). The mandibular morphology was evaluated according to the height and width of the mandibular cross-sections and the thickness of cortices. SPSS 16.0 was used to analyze the characteristics and differences of mandible among different vertical skeletal patterns.

RESULTSThe height of symphysis in the high-angle group was higher than that in the low-angle group, but the height of molars in the low-angle group was higher than that in the high-angle group (P<0.05). In the regions of anterior teeth and premolars, the width of upper one third of the mandibular cross-sections in the low-angle group was significantly larger than those in the high-angle group, while in the symphysis and lateral incisors regions, the width of lower one third of the mandibular cross-sections in the low-angle group was larger than those in the high-angle group (P<0.05). Except of the region of premolars, the cortical thickness of base in the low-angle group was significant thicker than those in the high-angle group (P<0.05). In the regions of canine, premolar and molar, the cortical thickness of buccal upper one third in the low-group was thicker than those in the high-angle group, but in the regions of canine and the second molar, the cortical thickness of buccal lower one third in the low-angle group was thi- cker than those in the high-angle group (P<0.05). In the regions of the symphysis, the cortical thickness of lingual lower one third in the low-angle group was thicker than those in the high-angle group (P<0.05), but in the regions of premolar and molar of lingual upper one third in the low-angle group was thicker than those in the high-angle group (P<0.05).

CONCLUSIONThe height and width of the cross-sections of the body of mandible differed more than thickness of cortical bone among the three different vertical skeletal patterns. The height of cross-sections decreases gradually from the anterior region to the posterior region in three groups. The width of cross-sections in the low-group is thicker than those in other two groups. The thickness of cortical bones decreases successively from low, average to high angle group.

Objective:To investigate the risk factors for delirium after intertrochanteric fracture surgery in the elderly.Methods:The data of 423 elderly patients with femoral intertrochanteric fracture were retrospectively analyzed who had been treated by closed reduction and internal fixation with proximal femoral nail antirotation (PFNA) at Department of Orthopedics, The Second Central Hospital of Baoding from December 2010 to April 2018. They were 205 males and 218 females, aged from 70 to 98 years (mean, 78.6 years). By AO classification, 239 fractures were type 31-A1, 141 ones type 31-A2, and 43 ones type 31-A3. Of them, 362 were complicated with disease of internal medicine. The interval from injury to surgery ranged from 4 to 72 hours with an average of 46.6 hours. The incidence of postoperative delirium was recorded. The risk factors were screened by univariate analysis from the hidden blood loss, gender, age, body mass index, complications, anesthesia method, preoperative preparation time and electrolyte disturbance; multivariate logistic regression analysis was used to determine the independent risk factors from the factors with P< 0.05. Results:Post-operative delirium occurred in 49 of the 423 patients (11.58%) (29 cases on the first postoperative day and 20 ones on the second postoperative day). It was not observed in the other 374 (88.42%) patients. Univariate analysis showed significant differences in the interval from injury to surgery, hidden blood loss and electrolyte disturbance between the patients with and without postoperative delirium ( P<0.05). Multivariate logistic regression analysis showed that the interval from injury to surgery >48 hours ( OR=3.386, 95% CI: 1.362 to 6.638), hidden blood loss>600 mL ( OR=10.292, 95% CI: 1.244 to 35.091) and electrolyte disturbance ( OR=4.157, 95% CI: 1.595 to 7.626) were the independent risk factors for postoperative delirium in elderly patients with intertrochanteric fracture. Conclusion:Long preoperative preparation, a large amount of hidden blood loss and postoperative electrolyte disturbance may be the risk factors for post-operative delirium in elderly patients with intertrochanteric fracture afterinternal fixation.

Objective To investigate the influencing factors of adverse pregnancy outcomes in patients with preeclampsia and the predictive value of serum trace elements in the second trimester.Methods A total of 98 patients with preeclampsia admitted to Qujing First People's Hospital from January 2019 to June 2022 were enrolled in the study.Patients were divided into poor outcome group and good outcome group according to whether they had adverse pregnancy outcomes.The clinical data of all patients enrolled in the study were col-lected and the serum levels of trace elements calcium,copper,zinc and iron were detected in the second trimes-ter.Univariate analysis and multivariate Logistic regression were used to analyze the influencing factors of ad-verse pregnancy outcomes in patients with preeclampsia.The levels of serum trace elements in the second tri-mester of pregnancy were compared between the poor outcome group and the good outcome group.The re-ceiver operating characteristic(ROC)curve was used to evaluate the predictive value of serum trace elements calcium,copper,zinc and iron for adverse pregnancy outcomes in patients with preeclampsia.Results Univari-ate analysis showed that compared with the good outcome group,the poor outcome group had significantly higher systolic blood pressure,24 h urinary protein quantitation,and D-dimer level(P＜0.05)and significantly less gestational age and platelet count at admission(P＜0.05).Multivariate Logistic regression analysis showed that 24 h urinary protein quantification,D-dimer and platelet count were the influencing factors of ad-verse pregnancy outcomes in patients with preeclampsia(P＜0.05).The levels of serum trace elements calci-um,copper,and zinc in the poor outcome group were significantly lower than those in the good outcome group(P＜0.05),and the level of iron was significantly higher than that in the good outcome group(P＜0.05).ROC curve analysis showed that the areas under the curves(AUCs)of serum calcium,copper,zinc,and iron in the second trimester of pregnancy for predicting adverse pregnancy outcomes in preeclampsia patients were 0.830(95％CI:0.780-0.880),0.855(95％CI:0.805-0.905),0.847(0.797-0.897)and 0.861(95％CI:0.811-0.911),respectively.Conclusion Adverse pregnancy outcomes in patients with preeclampsia are re-lated to 24 h urine protein,D-dimer and platelet count.The levels of serum trace elements calcium,copper,zinc and iron in the second trimester of pregnancy change significantly in patients with adverse pregnancy out-comes,which may become predictive markers of adverse pregnancy outcomes.

OBJECTIVETo study the function of keratinocyte growth factor (KGF) on apoptosis of oral mucosal epithelial cells and to provide a basis for further investigation of the role of KGF in the occurrence and development of oral mucosal diseases.

METHODSDifferent concentrations of KGF (control group, 0 ng x mL(-1); experiment 1 group, 5 ng x mL(-1); experimental 2 group, 25 ng x mL(-1); experiment 3 group, 50 ng x mL(-1)) were added in oral mucosa epithelial cells cultured in vitro. After training for 12, 24, and 48 h, cell morphology was observed under an inverted microscope. Apoptosis was detected by using a flow cytometry instrument, and mRNA expression of apoptosis-related genes Bcl-2 and Bax was detected by using Real-Time fluorescent quantitative detection.

RESULTSCell adherence of the experimental group was more obvious than that of the control group, and the cell nucleolus of the experiment 3 group was obviously cultured at 48 h. After culturing for 48 h, the apoptosis rate and Bcl-2 and Bax mRNA expression among the four groups were statistically significant. The increase of KGF concentration, apoptosis rate, and Bax mRNA expression gradually reduced, whereas Bcl-2 mRNA expression increased (P < 0.05).

CONCLUSIONKGF may inhibit epithelial cell apoptosis through upregulation of Bcl-2 mRNA and downregulation of Bax mRNA.

Objective:To evaluate the short-term efficacy of left colonic artery preservation in laparoscopic-assisted radical resection in elderly patients with rectal cancer.Methods:168 patients aged 65 and over who had undergonelaparoscopic-assisted radical resection of rectal cancer in the gastrointestinal surgery department of Beijing Hospital from December 2017 to December 2020 were retrospectively analyzed.According to different surgical methods, they were divided into the observation group with 90 subjects(the LCA group)and the control group with 78 subjects(the non-LCA group).Basic data, intraoperative, postoperative and clinicopathological data of the two groups were compared and analyzed.Results:There were no statistically significant differences between the two groups in operative time[(172.3±35.5)min vs.(155.5±28.7)min, t=2.182, P=0.103], intraoperative blood loss[(72.6±22.5)ml vs.(67.3±18.4)ml, t=1.473, P=0.128], number of group 253 lymph nodes dissected[(3.8±1.5) vs.(4.2±1.6), t=0.785, P=0.221], and total number of lymph nodes dissected[(14.1±4.3) vs.(15.8±5.0), t=1.652, P=0.113].There was no significant difference in the incidence of anastomotic hemorrhage[4.4%(4/90) vs.3.8%(3/78), χ2=1.182, P=0.133]and the incidence of urinary retention[4.4%(4/90) vs.6.4%(5/78), χ2=1.785, P=0.148].The time to first postoperative flatus[(52.4±23.2)h vs.(68.3±29.3)h, t=2.652, P=0.023]and length of postoperative hospital stay[(9.07±3.56)d vs.(10.68±4.94)d, t=2.785, P=0.017]in the LCA group were shorter than those in the non-LCA group.The incidences of anastomotic leakage in the LCA group and the non-LAC group were 2.2%(2/90)and 5.1%(4/78), respectively, and the difference was statistically significant( t=3.575, P=0.001). Conclusions:LCA preservation in laparoscopic-assisted radical resection of rectal cancer in elderly patients with rectal cancer is safe and feasible, reduces the incidence of anastomotic leakage, and shorten the time to first postoperative flatus and length of postoperative hospital stay.It has good practical clinical value.