肌抑制素与慢性阻塞性肺疾病患者的营养不良

目的 调查慢性阻塞性肺疾病(COPD)稳定期患者的营养状况,通过检测外周血清中肌抑制素的水平,探讨肌抑制素与COPD患者营养不良的关系.方法 选71例COPD稳定期患者和60例老年健康对照者,参照营养不良多参数评分(MNI)对所有受试者的营养状况进行总体评价;采用酶联免疫吸附法检测受试者血清中肌抑制素、TNFα、C反应蛋白(CRP)水平.结果 COPD患者MNI显著升高,其中MNI≥5分者55例(77%),MNI＜5分者16例.MNI≥5分者血清中肌抑制素水平为(12.18±4.76)μg/L,较MNI＜5分者[(9.73±2.85)μg/L]和健康对照者[(7.93±2.35)μg/L]显著升高(P＜0.001).COPD患者TNFα显著升高,与健康对照者比差异有统计学意义(P＜0.05).COPD患者血清肌抑制素水平与MNI、TNFα水平呈正相关(r=0.438,P=0.000;r=0.234,P=0.041).结论 COPD患者普遍存在较严重的营养不良,血清肌抑制素水平明显升高,营养不良与血清肌抑制素升高密切相关.

Abstract：

Objective To investigate the prevalence and severity of malnutrition in patients with stable chronic obstructive pulmonary disease (COPD) , analyze serum levels of myostatin, tumor necrosis factor alpha (TNFα) and C reactive protein (CRP) , and investigate the relationship between serum myostatin and malnutrition in COPD. Methods Seventy-one patients with stable COPD and 60 age-matched healthy volunteers were recruited in this study. Pulmonary function was tested in all of the subjects and the severity of malnutrition was evaluated by a multiple-parameter malnutritional index (MNI). Based on the MNI scores, patients with COPD were divided into group Ⅰ (MNI≥5 score) and group Ⅱ (MNI ＜ 5 score) , the former represents the patients with severe or very severe malnutrition while the latter represents the patients with mild or without malnutrition. Serum concentration of myostatin, TNFα and CRP were measured by enzyme-linked immunosorbent assay. Results The MNI score was significantly elevated in patients with COPD [(7. 75 ±3. 86)score] compared with the controls [(1. 13 ±0. 96)score; P＜0.001],and 55 patients (77%) in COPD group Ⅰ showed MNI ≥ 5 (9. 30 ± 3. 01) score. Serum myostatin concentration was significantly elevated in COPD group Ⅰ [(12. 18 ±4. 76)μg/L] than in COPD group Ⅱ [(9. 73 ±2.85) μgL] and controls [(7.93 ±2.35) μg/L], with each P ＜ 0.001. Serum TNFα concentration was also significantly elevated in patients with COPD compared with the controls (P ＜ 0. 001).Pearson correlation analysis showed that serum myostatin levels were significantly correlated with MNI scores (r = 0. 438, P - 0. 000) and TNFa levels (r = 0. 234, P = 0. 041) in COPD group (combined group I and Ⅱ) while MNI scores were correlated inversely with BMI in COPD group (r = - 0. 530, P = 0. 000) . After stratified with subgroups, the correlation between myostatin levels and MNI scores was more significant and the correlation coefficient was higher (r =0.464, P =0.000) in COPD group I patients. Moreover,myostatin levels were inversely correlated with BMI (r = - 0. 287, P = 0. 034) and forced expiratory volume in one second of the predicted value (r = - 0. 264, P = 0. 049) in COPD group I patients. Conclusions Malnutrition commonly and substantially exists in patients with COPD; serum myostatin concentration is significantly elevated and is correlated with the severity of malnutrition in the patients. The elevation of serum myostatin may contribute to malnutrition in COPD patients.     

Porcine model characterizing various parameters assessing the outcome after acetaminophen intoxication induced acute liver failure

AIM To investigate the changes of hemodynamic and laboratory parameters during the course of acute liver failure following acetaminophen overdose.METHODS Eight pigs underwent a midline laparotomy following jejunal catheter placement for further acetaminophen intoxication and positioning of a portal vein Doppler flow-probe. Acute liver failure was realized by intrajejunal acetaminophen administration in six animals, two animals were sham operated. All animals were invasively monitored and received standardized intensive care support throughout the study. Portal blood flow, hemodynamic and ventilation parameters were continuously recorded. Laboratory parameters were analysed every eight hours. Liver biopsies were sampled every 24 h following intoxication and upon autopsy.RESULTS Acute liver failure (ALF) occurred after 28 ± 5 h resulted in multiple organ failure and death despite maximal support after further 21 ± 1 h (study end). Portal blood flow (baseline 1100 ± 156 m L/min) increased to a maximum flow of 1873 ± 175 m L/min at manifestation of ALF, which was significantly elevated(P 0.01). Immediately after peaking, portal flow declined rapidly to 283 ± 135 m L/min at study end. Thrombocyte values (baseline 307 × 103/μL± 34 × 103/μL) of intoxicated animals declined slowly to values of 145 × 103/μL± 46 × 103/μL when liver failure occurred. Subsequent appearance of severe thrombocytopenia in liver failure resulted in values of 11 × 103/μL± 3 × 103/μL preceding fatality within few hours which was significant(P 0.01).CONCLUSION Declining portal blood flow and subsequent severe thrombocytopenia after acetaminophen intoxication precede fatality in a porcine acute liver failure model.     

椎动脉支架置入术后sICAM-1、hs-CRP和TNF-α血清浓度的变化及其临床意义

目的 观察椎动脉支架置入术后血清炎性细胞因子的动态变化并探讨其临床意义.方法 纳入48例椎动脉支架置入术患者,以48例单纯接受脑血管造影的患者作为对照组,在支架置入(血管造影)前以及支架置入后24 h、48 h、3 d、1周和3周时检测血清可溶性细胞间黏附分子-1(soluble intercellular adhension molecule-1,sICAM-1)、高敏C-反应蛋白(high-sensitivity C-reactive protein,hs-CRP)和肿瘤坏死因子-α(tumor necrosis factor-α,TNF-α)水平.结果 与支架置入前相比,支架置入组支架置入后24 h时血清ks-CRP[(4.85 4±0.53)mg/L对(2.57±0.36)mg/L,P＜0.05]、TNF-α[(2.42±0.34)μg/L对(1.08±0.37)μg/L,P＜0.05]和sICAM-1[(449.43±47.16)μg/L对(269.15±37.46)μg/L,P＜0.05]水平均显著增高.hs-CRP水平在支架置入后48 h时达高峰[(6.24±0.59)mg/L],3周时[(2.51±0.29)mg/L]恢复至支架置入前水平[(2.57±0.36)mg/L];TNF-α水平支架置入后3 d时[(2.30±0.25)μg/L]达高峰,3周时[(1.89±0.13)μg/L]仍维持在较高水平;sICAM-1水平则持续升高至3周时[(296.95±59.72)μg/L].支架置入组支架置入后24 h血清hs-CRP、TNF-α和sICAM-1水平分别显著高于对照组造影后24 h时的(3.25±0.40)mg/L、(1.184±0.19)μg/L和(336.57±50.18)μg/L(P均＜0.05).结论 椎动脉支架置入术后血清hs-CRP、TNF-α和sICAM-1水平显著增高,提示支架置入引起了持续时间较长的炎症反应.

Abstract：

Objective To observe the dynamic changes of serum inflammatory factors after vertebral artery stenting and to investigate its clinical significance. Methods A total of 48 patients treated with vertebral artery stenting were included, and 48 patients only received cerebral angiography were used as a control group. The levels of soluble intercellular adhesion molecule-1 (sICAM-1), high-sensitivity C-reactive protein (hs-CRP) and tumor-necrosis factor-α (TNF-α) were detected before procedure (angiography), at 24 h, 48 h, 3 d, and 1 and 3 weeks after procedure (angiography). Results The serum levels of hs-CRP (4. 85 ± 0. 53 mg/L vs. 2. 57 ±0. 36 mg/L,P＜0. 05), TNF-α (2.42 ±0. 34 μg/L vs. 1. 08 ±0. 37 μg/L,P ＜0. 05) and sICAM-1 (449.43 ± 47. 16 μg/L vs. 269. 15 ± 37. 46 μg/L, P ＜ 0. 05) at 24 hours after procedure in the stenting group were significantly elevated compared with those before procedure. The Hs-CRP level (6.24 ± 0.59 mg/L) reached the peak at 48 hours after procedure. At week 3 (2. 51 ±0.29 mg/L), it returned to the level before procedure (2. 57 ±0. 36 mg/L); TNF-α level reached the peak at day 3 (2.30 ± 0.25 μg/L), and it remained higher level at week 3 (1. 89 ±0. 13 μg/L); the sICAM-1 level continued to rise at week 3 (296. 95 ± 59. 72 μg/L). The serum hs-CRP, TNF-α and sICAM-1 levels at 24 hours after procedure in the stenting group were significantly higher than those (3. 25 ±0.40 mg/L、J. 18 ±0. 19 μg/L and 336. 57 ± 50. 18μg/L) in the control group (all P＜0.05). Conclusions The serum hs-CRP, TNF-α, sICAM-1 levels were significantly elevated after vertebral artery stenting. It was suggested that the stenting caused a longer duration of inflammatory response.     

Effectiveness and safety of continuous wound infiltration for postoperative pain management after open gastrectomy

AIM: To prospectively evaluate the effectiveness and safety of continuous wound infiltration(CWI) for pain management after open gastrectomy. METHODS: Seventy-five adult patients with American Society of Anesthesiologists(ASA) Physical Status Classification System(ASA) grade 1-3 undergoing open gastrectomy were randomized to three groups. Group 1 patients received CWI with 0.3% ropivacaine(group CWI). Group 2 patients received 0.5 mg/m L morphine intravenously by a patient-controlled analgesia pump(PCIA)(group PCIA). Group 3 patients received epidural analgesia(EA) with 0.12% ropivacaine and 20 μg/m L morphine with an infusion at 6-8 m L/h for 48 h(group EA). A standard general anesthetic technique was used for all three groups. Rescue analgesia(2 mg bolus of morphine, intravenous) was given when the visual analogue scale(VAS) score was ≥ 4. The outcomes measured over 48 h after the operation were VAS scores both at rest and during mobilization, total morphine consumption, relative side effects, and basic vital signs. Further results including time to extubation, recovery of bowel function, surgical wound healing,mean length of hospitalization after surgery, and the patient's satisfaction were also recorded.RESULTS: All three groups had similar VAS scores during the first 48 h after surgery. Group CWI and group EA, compared with group PCIA, had lower morphine consumption(P 0.001), less postoperative nausea and vomiting(1.20 ± 0.41 vs 1.96 ± 0.67, 1.32 ± 0.56 vs 1.96 ± 0.67, respectively, P 0.001), earlier extubation(16.56 ± 5.24 min vs 19.76 ± 5.75 min, P 0.05, 15.48 ± 4.59 min vs 19.76 ± 5.75 min, P 0.01), and earlier recovery of bowel function(2.96 ± 1.17 d vs 3.60 ± 1.04 d, 2.80 ± 1.38 d vs 3.60 ± 1.04 d, respectively, P 0.05). The mean length of hospitalization after surgery was reduced in groups CWI(8.20 ± 2.58 d vs 10.08 ± 3.15 d, P 0.05) and EA(7.96 ± 2.30 d vs 10.08 ± 3.15 d, P 0.01) compared with group PCIA. All three groups had similar patient satisfaction and wound healing, but group PCIA was prone to higher sedation scores when compared with groups CWI and EA, especially during the first 12 h after surgery. Group EA had a lower mean arterial pressure within the first postoperative 12 h compared with the other two groups.CONCLUSION : CWI with ropivacaine yields a satisfactory analgesic effect within the first 48 h after open gastrectomy, with lower morphine consumption and accelerated recovery.     

二氧化碳气腹时间对老年腹腔镜胆囊切除术患者凝血-纤溶和血管内皮细胞活性的影响

目的 观察二氧化碳(CO2)气腹时间对老年人腹腔镜胆囊切除术(LC)患者凝血-纤溶和血管内皮细胞活性的影响.方法 胆石症择期行LC患者45例,年龄＞60岁,术后根据气腹持续时间分组:气腹时间≤60 min组21例;气腹时间＞60 min组24例.于入院检查时(术前)、术毕、术后第1、2、3天抽取静脉血检测凝血酶原时间(PT)、激活部分凝血活酶时间(APTT)、凝血酶原片段1+2(F1+2)浓度、抗凝血酶-Ⅲ(AT-Ⅲ)活性、纤维蛋白原(Fib)浓度、组织纤溶酶原激活物(t-PA)浓度、纤溶酶原激活物抑制物-1(PAI-1)浓度、D-二聚体(D-D)浓度、血管性血友病因子(vWF)活性.结果 (1)凝血指标:术后第3天,＞60 min组的,F1+2为 (1.60±0.26) μg/L,高于≤60 min组的(1.32±0.24) μg/L(P＜0.05);AT-Ⅲ为(84.82±20.21)%,低于≤60 min组的(97.49±16.87)%(P＜0.05);术后第2、3天的Fib分别为(3.87±0.62)、(3.98±0.77)g/L,高于≤60 min组的 (3.42±0.72)、(3.42±0.63)g/L(P＜0.05).(2)纤溶-抗纤溶指标:＞60 min组术后第2 、3天的PAI-1为(33.93±10.42)、(32.90±11.25) μg/L高于≤60 min组的(26.69±9.49)、(26.31±7.06)μg/L(P＜0.05).(3)血管内皮细胞活性指标:＞60 min组术后第2 、3天的vWF为(174.53±44.03)%、(176.31±47.6)%,高于≤60 min组的(134.37±37.74)%、(131.21±36.34)% (P＜0.05).结论 老年LC患者,术后有明显的凝血-纤溶激活和血管内膜损伤;随气腹时间延长,凝血激活和纤溶抑制程度高,凝血-纤溶相对不平衡,血管内膜损伤更明显,可能增加血栓形成风险.

Abstract：

Objective To observe the effect of duration of carbon dioxide pneumoperitoneum on coagulation, fibrinolysis and endothelial activation in elderly patients undergoing laparoscopic cholecystectomy (LC). Methods The 45 elderly patients with cholelithiasis scheduled for LC, aged over 60 yeas, were placed in different groups respectively after surgery according to the duration of pneumoperitoneum. The duration of pneumoperitoneum was ≤60 minutes in group A (n=21),and more than 60 minutes in group B (n=24). Venous blood samples were taken on admission (baseline), at the end of surgery, the 1st, 2nd and 3rd day after surgery for determination of prothrombin time (PT), activated partial thromboplastin time (APTT), prothrombin fragment F1+2 (F1+2), antithrombin 3 (AT-Ⅲ activity), fibrinogen (Fib), tissue plasminogen activator (t-PA), plasminogen activator inhibitor type-1 (PAI-1), D-dimer (D-D), von Willebrand factor (vWF activity). Results Concerning the coagulation activation, at the 3rd postoperative day, the level of F1+2 was significantly higher in group B than in group A [(1.60±0.26) μg/L vs. (1.32±0.24) μg/L, P＜0.05]; AT-III was significantly higher in group B than in group A [(84.82%±20.21%) vs. (97.49%±16.87%), P＜0.05]. At the 2nd and 3rd postoperative day, the levels of Fib were significantly higher in group B than in group A [(3.87±0.62) g/L vs. (3.42±0.72) g/L, (3.98±0.77) g/L vs. (3.42±0.63) g/L, respectively, P＜0.05]. Concerning fibrinolysis, But at the 2nd and 3rd postoperative day, the level of PAI-1 was significantly higher in group B than in group A [(33.93±10.42) μg/L vs. (26.69±9.49) μg/L, (32.90±11.25) μg/L vs. (26.31±7.06) μg/L respectively, P＜0.05]. Concerning endothelial activation, at the 2nd and 3rd postoperative day, vWF was significantly higher in group B than in group A [(174.53%±44.03%) vs. (134.37%±37.74%), (176.31%±47.6%) vs. (131.21%±36.34%), respectively, P＜0.05]. Conclusions Marked activations of coagulation-fibrinolysis and endothelial activation are observed postoperatively in elderly patients undergoing laparoscopic cholecystectomy. Along with prolonged duration of pneumoperitoneum, more pronounced alterations of increased coagulation, reduced fibrinolysis and endothelial activation are observed, which could constitute an imbalanced situation of coagulation-fibrinolysis and increases the risk of venous thrombosis.     

血浆甘露聚糖结合凝集素与类风湿关节炎肾损害的相关性研究

目的 检测类风湿关节炎(RA)相关性肾损害患者甘露聚糖结合凝集素(MBL)的血浆水平,探讨MBL在RA相关肾损害中可能的作用机制.方法 用酶联免疫吸附试验(ELISA)法检测19例RA相关肾损害患者、49例RA不伴肾损害患者及40名健康对照者的血浆MBL水平,并收集RA患者临床资料及相关实验室检查资料进行对比分析.采用x2检验、t检验和Spearman相关分析进行统计学处理.结果 较无肾损害组比,RA相关肾损害组患者肿胀压痛关节数增多[(15±9)和(9±11)个],晨僵时间延长[(2.9±1.3)和(2.3±1.6)h],其他(除肾脏)关节外伴随症状发生率明显升高[(42.1%和16.3%),P＜0.01或P＜0.05];但二组间RA病程、关节畸形的发生率差异无统计学意义(P＞0.05);RA相关肾损害组血小板(PLT)[(376±155)×109/L和(304±121)×109/L]、循环免疫复合物(CIC)[(4.3±3.0)和(2.9±3.3)g/L]、红细胞沉降率(ESR)[(79±46)和(53±31)mm/1 h]、类风湿因子(RF)[(77±42)和(52±49)U/ml]、C反应蛋白(CRP)[(32±28)和(23±18)mg/L]、免疫球蛋白IgG[(11.7±2.6)和(8.4±2.4)g/L]、补体C3[(1.18±0.53)和(0.94±0.21)g/L]高于RA无肾损害组(P＜0.01或P＜0.05),血浆白蛋白(Alb)[(26±13)比(30±9)g/L]低于无肾损害组(P＜0.05);二组RA患者血浆MBL水平均较对照组血浆MBL水平[(3.1±0.5)mg/L]显著下降(P＜0.01),RA相关肾损害组MBL水平[(1.7±1.2)mg/L]较无肾损害组MBL水平[(1.4±1.3)mg/L]升高(P＜0.05);RA相关肾损害组MBL与IgG、C3、CRP、尿蛋白定量(24 h)呈正相关(r分别为0.6,0.6,0.47,0.57;P＜0.05).结论 RA相关肾损害与免疫复合物相关;RA相关肾损害患者血浆MBL水平是升高的,血浆中高水平MBL可能是RA相关肾损害的发病机制之一.

Abstract：

Objective To detect the serum level of mannose binding lectin (MBL) in patients with renal injury induced by rheumatoid arthritis (RA), and to investigate the role of MBL in the pathogenesis of renal injury in RA. Methods ELISA was used to measure the serum MBL level of 19 RA patients with renal injury, 49 RA patients without renal injury and 40 healthy individuals. The clinical features and laboratory markers were compared and analyzed by chi-square test, two independent samples t-test and Spearman's correlation analysis. Results Compared with RA patients without renal injury, the number of tender and swollen joints [(15±9) vs (9±11)], duration of morning stiffness [(2.9±1.3) vs (2.3±1.6) h] and extraarticular manifestations (42.1％ vs 16.3％) in RA patients with renal injury were significantly higher (P＜0.05or P＜0.01). There was no significant difference between the two groups in RA disease duration and jointdeformity(P＞0.05). In patients with renal injury, the level of platelet count [(376±155)×109/L vs (304±121)×109/L], CIC[(4.3±3.0) vs (2.9±3.3) g/L], ESR[(79±46) vs (53±31) mm/1 h], RF[(77±42) vs (52±49)U/ml], CRP[(32±28)vs (23±18)mg/L], IgG[(11.7±2.6)vs (8.4±2.4)g/L], C3[(1.18±0.53)vs (0.94±0.21) g/L] were higher than those in RA patients without renal injury (P＜0.01 or P＜0.05); the level of Alb [(26±13) vs (30±9) g/L] was lower than that in RA patients without renal injury (P＜0.05). The level of serum MBL in the two groups of RA patients was significantly lower than that in the healthy group [(3.1±0.5)mg/L](P＜0.01), and the level of serum MBL in RA patients with renal injury [(1.7±1.2) mg/L] was higher than that in RA patients without renal injury [(1.4±1.3) mg/L](P＜0.05). The level of serum MBL in RA patients with renal injury showed a positive correlation with IgG, C3, CRP and 24 h urine protein level (r=0.6, 0.6, 0.47, 0.57; P＜0.05). Conclusion Renal injury in RA patients is immune complex dependent. The serum level of MBL is higher in patients with renal injury, therefore, high-concentration MBL may be one of a potential causes of renal injury in RA patients.     

Expression of type Ⅰ interferon in monocyte-derived dendritic cells after Toll like receptor 3 triggered in patients with chronic hepatitis B

Objective To detect the expression of type Ⅰ interferon in monocyte-derived dendritic cells(MoDCs)after Toll like receptor(TLR)3 triggered in patients with chronic hepatitis B(CHB),and to evaluate immune responses of CHB patients and its roles in the mechanisms of persistent infection of hepatitis B virus(HBV)and chronicity of hepatitis.Methods Peripheral blood mononuclear cells(PBMCs)were isolated and purified using magnetic beads(plasma was saved simultaneously)from 26 CHB patients and 18 healthy volunteers(HV).Dendritic cells(DCs)were induced and proliferated in a culture medium with recombinant human granulocyte macrophage colony stimulating factor(rhGM-CSF)and recombinant human interleukin(rhIL-4).EX3s were stimulated with Poly Ⅰ:C and the supernatants were collected at 0 h and 24 h after stimulation.Type Ⅰ interferon(IFN-α and IFN-β)in plasma and supernatants were examined by enzyme linked immunosorbent assay (ELISA).Results The levels of type Ⅰ interferon in plasma were not significantly different in groups of HV and CH B.IFN-α and IFN-β expressions in supernatants before Poly Ⅰ:C stimulation were(80.00±16.15)ng/L,(36.39±13.90)ng/L in CHB group and(76.76±15.90)ng/L,(37.14±13.68)ng/L in HV group,respectively.And there were no statistical differences between two groups(t=1.651,t=0.178;both P＞0.05).IFN-α expressions in supernatants at 24 h after stimulation in two groups were both higher than those before stimulation(at 0 h),but there were no statistical differences(t=1.534,t=1.243;both P＞0.05).IFN-β expressions in supernatants at 24 h after stimulation in HV group was(54.57±16.80)ng/L,which was significantly higher than that at 0 h(37.14±13.68)ng/L(t=4.061,P＜0.05).However,there was no significant difference at 24 h than tht at 0 h in CHB group(t=1.796,P＞0.05).At 24 h after stimulation.IFN-β level was(54.57±16.80)ng/L in HV group,which was significantly higher than that[(41.64±12.57)ng/L]in CHB group(t=2.921,P＜0.05).Conclusions Functions of MoDCs from CHB patients are impaired and MoDCs could not express type Ⅰ interferon normally.Expression of type Ⅰ interferon after TLR3 triggered in CHB patients is mainly IFN-β.     

Expression of type Ⅰ interferon in monocyte-derived dendritic cells after Toll like receptor 3 triggered in patients with chronic hepatitis B

Objective To detect the expression of type Ⅰ interferon in monocyte-derived dendritic cells(MoDCs)after Toll like receptor(TLR)3 triggered in patients with chronic hepatitis B(CHB),and to evaluate immune responses of CHB patients and its roles in the mechanisms of persistent infection of hepatitis B virus(HBV)and chronicity of hepatitis.Methods Peripheral blood mononuclear cells(PBMCs)were isolated and purified using magnetic beads(plasma was saved simultaneously)from 26 CHB patients and 18 healthy volunteers(HV).Dendritic cells(DCs)were induced and proliferated in a culture medium with recombinant human granulocyte macrophage colony stimulating factor(rhGM-CSF)and recombinant human interleukin(rhIL-4).EX3s were stimulated with Poly Ⅰ:C and the supernatants were collected at 0 h and 24 h after stimulation.Type Ⅰ interferon(IFN-α and IFN-β)in plasma and supernatants were examined by enzyme linked immunosorbent assay (ELISA).Results The levels of type Ⅰ interferon in plasma were not significantly different in groups of HV and CH B.IFN-α and IFN-β expressions in supernatants before Poly Ⅰ:C stimulation were(80.00±16.15)ng/L,(36.39±13.90)ng/L in CHB group and(76.76±15.90)ng/L,(37.14±13.68)ng/L in HV group,respectively.And there were no statistical differences between two groups(t=1.651,t=0.178;both P＞0.05).IFN-α expressions in supernatants at 24 h after stimulation in two groups were both higher than those before stimulation(at 0 h),but there were no statistical differences(t=1.534,t=1.243;both P＞0.05).IFN-β expressions in supernatants at 24 h after stimulation in HV group was(54.57±16.80)ng/L,which was significantly higher than that at 0 h(37.14±13.68)ng/L(t=4.061,P＜0.05).However,there was no significant difference at 24 h than tht at 0 h in CHB group(t=1.796,P＞0.05).At 24 h after stimulation.IFN-β level was(54.57±16.80)ng/L in HV group,which was significantly higher than that[(41.64±12.57)ng/L]in CHB group(t=2.921,P＜0.05).Conclusions Functions of MoDCs from CHB patients are impaired and MoDCs could not express type Ⅰ interferon normally.Expression of type Ⅰ interferon after TLR3 triggered in CHB patients is mainly IFN-β.     

Expression of type Ⅰ interferon in monocyte-derived dendritic cells after Toll like receptor 3 triggered in patients with chronic hepatitis B

Objective To detect the expression of type Ⅰ interferon in monocyte-derived dendritic cells(MoDCs)after Toll like receptor(TLR)3 triggered in patients with chronic hepatitis B(CHB),and to evaluate immune responses of CHB patients and its roles in the mechanisms of persistent infection of hepatitis B virus(HBV)and chronicity of hepatitis.Methods Peripheral blood mononuclear cells(PBMCs)were isolated and purified using magnetic beads(plasma was saved simultaneously)from 26 CHB patients and 18 healthy volunteers(HV).Dendritic cells(DCs)were induced and proliferated in a culture medium with recombinant human granulocyte macrophage colony stimulating factor(rhGM-CSF)and recombinant human interleukin(rhIL-4).EX3s were stimulated with Poly Ⅰ:C and the supernatants were collected at 0 h and 24 h after stimulation.Type Ⅰ interferon(IFN-α and IFN-β)in plasma and supernatants were examined by enzyme linked immunosorbent assay (ELISA).Results The levels of type Ⅰ interferon in plasma were not significantly different in groups of HV and CH B.IFN-α and IFN-β expressions in supernatants before Poly Ⅰ:C stimulation were(80.00±16.15)ng/L,(36.39±13.90)ng/L in CHB group and(76.76±15.90)ng/L,(37.14±13.68)ng/L in HV group,respectively.And there were no statistical differences between two groups(t=1.651,t=0.178;both P＞0.05).IFN-α expressions in supernatants at 24 h after stimulation in two groups were both higher than those before stimulation(at 0 h),but there were no statistical differences(t=1.534,t=1.243;both P＞0.05).IFN-β expressions in supernatants at 24 h after stimulation in HV group was(54.57±16.80)ng/L,which was significantly higher than that at 0 h(37.14±13.68)ng/L(t=4.061,P＜0.05).However,there was no significant difference at 24 h than tht at 0 h in CHB group(t=1.796,P＞0.05).At 24 h after stimulation.IFN-β level was(54.57±16.80)ng/L in HV group,which was significantly higher than that[(41.64±12.57)ng/L]in CHB group(t=2.921,P＜0.05).Conclusions Functions of MoDCs from CHB patients are impaired and MoDCs could not express type Ⅰ interferon normally.Expression of type Ⅰ interferon after TLR3 triggered in CHB patients is mainly IFN-β.     

Expression of type Ⅰ interferon in monocyte-derived dendritic cells after Toll like receptor 3 triggered in patients with chronic hepatitis B

Objective To detect the expression of type Ⅰ interferon in monocyte-derived dendritic cells(MoDCs)after Toll like receptor(TLR)3 triggered in patients with chronic hepatitis B(CHB),and to evaluate immune responses of CHB patients and its roles in the mechanisms of persistent infection of hepatitis B virus(HBV)and chronicity of hepatitis.Methods Peripheral blood mononuclear cells(PBMCs)were isolated and purified using magnetic beads(plasma was saved simultaneously)from 26 CHB patients and 18 healthy volunteers(HV).Dendritic cells(DCs)were induced and proliferated in a culture medium with recombinant human granulocyte macrophage colony stimulating factor(rhGM-CSF)and recombinant human interleukin(rhIL-4).EX3s were stimulated with Poly Ⅰ:C and the supernatants were collected at 0 h and 24 h after stimulation.Type Ⅰ interferon(IFN-α and IFN-β)in plasma and supernatants were examined by enzyme linked immunosorbent assay (ELISA).Results The levels of type Ⅰ interferon in plasma were not significantly different in groups of HV and CH B.IFN-α and IFN-β expressions in supernatants before Poly Ⅰ:C stimulation were(80.00±16.15)ng/L,(36.39±13.90)ng/L in CHB group and(76.76±15.90)ng/L,(37.14±13.68)ng/L in HV group,respectively.And there were no statistical differences between two groups(t=1.651,t=0.178;both P＞0.05).IFN-α expressions in supernatants at 24 h after stimulation in two groups were both higher than those before stimulation(at 0 h),but there were no statistical differences(t=1.534,t=1.243;both P＞0.05).IFN-β expressions in supernatants at 24 h after stimulation in HV group was(54.57±16.80)ng/L,which was significantly higher than that at 0 h(37.14±13.68)ng/L(t=4.061,P＜0.05).However,there was no significant difference at 24 h than tht at 0 h in CHB group(t=1.796,P＞0.05).At 24 h after stimulation.IFN-β level was(54.57±16.80)ng/L in HV group,which was significantly higher than that[(41.64±12.57)ng/L]in CHB group(t=2.921,P＜0.05).Conclusions Functions of MoDCs from CHB patients are impaired and MoDCs could not express type Ⅰ interferon normally.Expression of type Ⅰ interferon after TLR3 triggered in CHB patients is mainly IFN-β.     

缬沙坦联合氨氯地平或氢氯噻嗪对老年高血压患者血压变异性的影响

目的 比较缬沙坦联合氨氯地平或氢氯噻嗪对老年高血压患者血压变异性及一氧化氮、内皮素的影响.方法选取61例2、3级老年高血压患者,随机分为两组,分别给予缬沙坦+氨氯地平或缬沙坦+氢氯噻嗪行降压治疗,观察入选时、治疗第8周和第16周各种相关指示的变化.人选时检测血脂、空腹血糖、血尿酸,试验各个阶段监测24 h动态血压,检测血浆一氧化氮、内皮素水平.结果在患者入选时、治疗第8周和第16周三个时间点,缬沙坦+氨氯地平组和缬沙坦+氢氯噻嗪组24 h血压及白昼血压比较差异无统计学意义.治疗第16周,缬沙坦+氨氯地平组晨峰收缩压较缬沙坦+氢氯嚷嗪组明显降低[(22.6±8.8)mm Hg(1 mm Hg=0.133 kPa)比(26.3±13.7)mm Hg,P＜0.05];缬沙坦+氨氯地平组及缬沙坦+氢氯噻嗪组24 h收缩压变异性(SBPV)进行性降低[缬沙坦+氨氯地平组:(12.5±2.8)mm Hg比(10.2 ±2.2)mm Hg比(8.8±1.6)mm Hg,P＜0.01;缬沙坦±氢氯噻嗪组:(12.5±2.5)mmHg比(10.7±2.2)mm Hg比(9.6±2.0)mmHg,P＜0.01],缬沙坦+氨氯地平组及缬沙坦+氢氯噻嗪组白昼SBPV明显降低[缬沙坦+氨氯地平组:(12.2±3.0)mm Hg比(10.1±2.3)mm Hg比(8.4±1.9)mm Hg,P＜0.01;缬沙坦+氢氯噻嗪组:(11.8±2.7)mm Hg比(10.4±1.9)mm Hg比(9.6±2.2)mm Hg,P＜0.01],缬沙坦+氨氯地平组24 h舒张压变异性(DBPV)显著降低[(15.5±3.4)mm Hg比(13.0±3.5)mm Hg比(12.3±2.5)mm Hg,P＜0.01],缬沙坦+氢氯噻嗪组24 h DBPV无显著性变化;缬沙坦+氨氯地平组第16周白昼SBPV低于缬沙坦+氢氯噻嗪组[(8.4±1.9)mm Hg比(9.6 ±2.2)mm Hg,p＜0.05],缬沙坦+氨氯地平第8周、第16周的24 h DBPV、白昼DBPV低于缬沙坦+氢氯噻嗪组(P ＜0.01～0.05);缬沙坦+氨氯地平组一氧化氮进行性升高[(27.3±13.6)μmol/L比(47.2±16.3)μmol/L比(69.5±18.9)μmol/L,P＜0.01]、内皮素进行性降低[(45.3±8.0)ng/L比(37.4±3.9)ng/L比(34.2±4.4)ng/L,P＜0.01];缬沙坦+氢氯噻嗪组一氧化氮进行性升高[(33.5±13.9)μmol/L 比(49.7±21.9)μmol/L比(66.7 ±24.7)μmol/L,P＜0.01]、内皮素显著降低[(46.6±10.4)ng/L比(37.0±5.4)ng/L比(36.1±8.2)ng/L,P＜0.01].治疗第8周,缬沙坦+氨氯地平组收缩压变异性的降幅与一氧化氮的升幅有相关性(r =0.401,P=0.025).结论缬沙坦联合氨氯地平或氢氯噻嗪均能降低老年高血压患者血压变异性、改善血管内皮功能,缬沙坦联合氨氯地平可能更适合于老年高血压患者.     

健侧半球间歇θ脉冲刺激和低频重复经颅磁刺激治疗卒中后视空间忽略的效果比较

目的 对比间歇θ脉冲刺激(iTBS)刺激健侧半球前额叶背外侧(DLPFC)与1 Hz重复经颅磁刺激(rTMS)刺激健侧半球顶后皮质(PPC)治疗卒中后视空间忽略的疗效.方法 前瞻性连续纳入2019年4月至2021年3月入诊首都医科大学宣武医院康复医学科的33例卒中后视空间忽略患者,采用随机信封法将所有患者随机分为3组[...     

刺激导管连续三合一股神经阻滞技术用于老年患者单侧全膝关节置换术后自控区域镇痛

目的 探讨刺激导管连续"三合一"股神经阻滞技术用于老年患者单侧全膝关节置换术后自控区域镇痛的临床效果.方法 按美国麻醉工程师协会(ASA)分级Ⅰ～Ⅱ级的30例老年患者随机分为2组,刺激导管连续三合一殷神经阻滞技术进行术后镇痛(FB组)和舒芬太尼(Ⅳ组),每组15例.所有患者均采用静脉复合全身麻醉.FB组术后镇痛采用"三合一"股神经阻滞方法,PCA镇痛泵配方为0.2%罗哌卡因和舒芬太尼0.1μg/ml,持续背景剂量5 ml/h,单次注入剂量1.0 ml/次,锁定时间15 min.Ⅳ组术后镇痛采用静脉舒芬太尼,患者自控镇痛泵(PCA)配方为1 μg/ml舒芬太尼和0.04 mg/ml盐酸托烷司琼,持续背景剂量2 ml/h,单次注入剂量0.5 ml/次,锁定时间15min.两组镇痛维持时间48 h.结果 FB组术后4、8、12、24、48 h静息状态下视觉模拟评分(VAS)评分(1.3±1.1、1.2±1.0、1.1±0.9、1.1±1.0、1.0±0.9)分和术后z4、48 h主动功能锻炼时VAS评分(3.0±1.4和2.3±1.3)分与Ⅳ组(4.0±1.6、3.5±1.6、3.2±1.4、3.0±1.3、2.5±1.2、4.7±1.5、3.3±1.5)分相比差异有统计学意义(t分别为5.358、4.707、4.852、3.784、3.743、3.254、1.932,P<0.01或P<0.05).Ⅳ组恶心的发生率明显高于FB组(P=0.0022).FB组术后满意度明显高于Ⅳ组(χ2=41.1,P<0.01),术后48 h内吗啡追加用量显著低于Ⅳ组(U=2.412,P<0.01).结论 刺激导管连续"三合一"股神经阻滞技术用于老年患者单侧全膝关节置换术后,镇痛效果确切,无恶心、呕吐、瘙痒及嗜睡等不良反应,患者满意度高.     

肠内免疫微生态营养对重症急性胰腺炎模型猪肠道屏障功能的影响

目的 观察肠内免疫微生态营养(EIN)对重症急性胰腺炎(SAP)模型猪肠道屏障功能的影响.方法 家养猪20头注入5%牛磺胆酸钠和胰蛋白酶建立SAP模型.24 h后将18头成功造模猪均分为肠外营养(PN)组、肠内要素营养(EEN)组和EIN组,分别进行相应营养支持8 d.分别于造模前、后各时间点检测各组血淀粉酶、外周血内毒素及肠道通透性.8 d后处死动物取外周静脉血、胰、脾、肝、肺和肠系膜淋巴结进行细菌定性及定量检测,同时观察回肠末端黏膜形态及胰腺组织病理学改变并作病理评分.结果 各组血淀粉酶均明显升高,但组间比较差异无统计学意义(P＞0.05).营养8 d后EIN组外周血内毒素为(1.50±0.18)EU/L,肠道通透性为(42.8±20.0)×10-3,明显低于EEN组[(1.98±0.20)EU/L,(67.4±23.0)×10-3]和PN组[(3.96±0.40)EU/L,(197.2±47.4)×10-3](P值均＜0.05).EIN组胰腺和远隔脏器细菌数及细菌移位率亦明显低于PN组和EEN组(P＜0.05);三组间胰腺病理评分差异无统计学意义(P＞0.05).EIN组小肠绒毛高度、隐窝深度、黏膜厚度和绒毛形态正常率分别为(398.27±52.93)μm、(269.72±41.66)μm、(681.98±58.33)μm和79%,EEN组分别为(305.70±42.72)μm、(1 92.52±38.17)μm、(507.31±68.23)μm和47%,PN组分别为(218.32±35.81)μm、(145.76±23.34)μm、(376.20±48.23)μm和13V0,EIN组以上指标值均高于EEN组和PN组(P值均＜0.05).结论 EIN能保护SAP猪肠道屏障功能,降低肠道通透性,减少细菌及内毒素移位.     

姜黄素对糖尿病大鼠肾脏保护作用的实验研究

目的观察姜黄素（Cur）对糖尿病大鼠肾脏的保护作用。方法链脲佐菌素诱导糖尿病大鼠模型,随机分为DM组和DM＋Cur组,另设一正常对照（NC）组,每组10只。DM＋Cur组给予姜黄素200mg·kg^-1·d^-1灌胃,为期8周。然后进行肾脏形态学和生化指标观察。结果DM组大鼠血TC、TG、LDL—C、Ccr、UAER、UAlb／Cr、肾小球平均截面积（MGA）和肾小球平均体积（MGV）均显著高于NC组（P〈0．01或P〈0．05）,而HDL-C低于NC组（P〈0．05）。DM组大鼠肾小球明显增大,基底膜节段性增厚,部分足细胞足突融合。DM＋Cur组上述异常均明显减轻。结论姜黄素可明显减轻糖尿病大鼠肾脏肥大,降低尿白蛋白,其肾脏保护作用可能与降脂作用有关。     

早期神经功能恶化急性卒中患者的颈动脉粥样硬化超声特征

目的 探讨早期神经功能恶化(early neurological deterioration,END)急性卒中患者的颈动脉粥样硬化超声特征.方法 END定义为人院第7天时国立卫生研究院卒中量表评分较入院时至少增加2分.128例入院24 h内接受颈动脉超声检奁的急性缺血性卒中患者中,38例出现END的患者作为END组,40例危险因素相匹配的非END患者作为非END组.比较两组颈动脉粥样硬化超声特征.结果 END组斑块积分[(16.7±4.4)mm对(13.3±3.5)mm,t=2.673,P=0.009)、内膜-中膜横截面积[(26.4±8.5)mm2对(20.5±6.8)mm2,t=3.394,P=0.001]、动脉僵硬指数(28.94±4.29对21.22±5.85,t=6.618,P:0.000)以及小稳定斑块(66.7%对43.3%,χ2=9.164,P=0.003)、偏心性斑块(62.8%对45.6%,χ2=5.008,P=0.025)、狭窄≥50%(71.1%对37.5%,χ2=8.828,P=0.003)和负性重构(28.9%对7.5%,χ2=6.087,P=0.014)的构成比均显著高于非END组,而扩张系数[(14.74±8.66)×10-6/Pa对(19.16±9.35)×10-6/Pa,t=2.163,P=0.034]和顺应系数[(0.49±0.13)×10-4mm2/Pa对(0.58±0.11)×10-4 mm2/Pa,t=3.307,P:0.001]均显著低于END组.结论 斑块积分、内膜-中膜横截面积、动脉僵硬度、不稳定斑块、偏心性斑块、狭窄≥50%、负性重构、扩张性和顺应性等超声特征可能有助于预测急性卒中的END.     

帕瑞昔布用于老年患者腹腔镜胆囊切除术后镇痛效果观察

目的 观察围术期应用帕瑞昔布对老年患者腹腔镜胆囊切除术后镇痛效果的影响.方法 前瞻性、随机、双盲、安慰剂对照、平行分组研究,选择美国麻醉医师协会(ASA)病情评估分级标准Ⅰ或Ⅱ级的择期全麻下行腹腔镜胆囊切除手术患者40例,年龄60～80岁,随机分为帕瑞昔布组和安慰剂组,每组20例,帕瑞昔布组于手术前l0 min、手术后12 h和24 h分别静脉注射帕瑞昔布40 mg,安慰剂组于手术前10 min、手术后12 h和24 h分别静脉注射生理盐水5 ml,用视觉模拟评分法(VAS)观察术后2 h、4 h、6 h、12 h、24 h的疼痛强度和患者对镇痛的满意度.结果 与安慰剂组比较,帕瑞昔布组的术后2 h、4 h、6 h、12 h和24 h的VAS评分明显降低(均P＜0.05).帕瑞昔布组24 h镇痛满意度(8.1±1.2)分,高于安慰剂组(5.2±0.9)分,差异有统计学意义(t=7.402,P＜0.05).结论 静脉注射帕瑞昔布用于老年患者腹腔镜胆囊切除手术,能有效缓解术后疼痛,提高患者术后镇痛质量.

Abstract：

Objective To observe the postoperative analgesic effects of perioperative intravenous parecoxib in gerontal patients undergoing laparoscopic cholecystectomy. Methods A prospective,randomized, double-blind, placebo-controlled, parallel group study was performed. The 40 American Society of Anesthesiologists (ASA) Ⅰ or Ⅱ patients (aged 60-80 years) undergoing elective laparoscopic cholecystectomy under general anesthesia were randomly allocated to 2 groups (n = 20,each): the parecoxib group received intravenous parecoxib 40 mg at 10 minutes before incision and 12 hours and 24 hours after incision; however, the placebo group received 5 ml normal saline instead of parecoxib at the same time. The intensity of algesia was measured using visual analogue scale (VAS)scores (1-10, 0 = no pain, 10 = worst pain), and was recorded at 2, 4, 6, 12, 24 hours after operation. The patients' global evaluation of postoperative analgesia was recorded and compared between the two groups. Results The VAS scores at the different time points were significantly less in parecoxib group than in placebo group (all P＜ 0.05). The patients' global evaluation of postoperative analgesia was higher in parecoxib group than in placebo group [(8. 1 ± 1.2) scores vs.(5.2± 0. 9 ) scores, t = 7. 402, P ＜ 0. 05]. Conclusions Intravenous parecoxib can effectively relieve postoperative algesia and improve postoperative analgesia after laparoscopic cholecystectomy.     

巴曲酶对血管性认知障碍的疗效观察

目的探讨巴曲酶治疗血管性认知障碍（VCI）的安全性和疗效。方法选择缺血性脑血管病所致、有认知功能障碍，但未达到痴呆标准的VCI患者80例，随机分为巴曲酶组和对照组，每组40例。巴曲酶组分别于入院后第1、8和第12周隔日给予巴曲酶静脉滴注（5U巴曲酶加入250ml等渗盐水），1次／d，4次／周。所有患者常规使用阿司匹林。采用简易精神状态量表（MMSE）和13常生活能力量表（ADL）评价认知功能及日常生活能力；并检测治疗前、后纤维蛋白原（FIB）水平，评估药物安全性。结果①巴曲酶组在治疗前及治疗后第8周，MMSE和ADL评分与对照组差异无统计学意义（P〉0．05）；在第12周，MMSE和ADL评分较治疗前，差异有统计学意义（P〈0．05），但较对照组差异无统计学意义（P〉0．05）；在第16周，MMSE和ADL评分较治疗前和对照组均有明显改善（P〈0．05）。而对照组在第8、12及16周，MMSE和ADL评分较治疗前变化不明显（P〉0．05）。②巴曲酶组第1周治疗前、后FIB分别为（3．50±0．59）、（1．95±0．43）g／L、第8周治疗前、后分别为（3．22±0．54）、（2．18±0．46）g／L，第12周治疗前、后分别为（2．75±O．41）、（2．40±0．41）g／L，治疗前、后差异均有统计学意义（P〈0．01）。对照组第1、8、12周FIB分别为（3．39±O．61）、（3．30±0．59）、（3．24±0．56）g／L，差异无统计学意义（P〉0．05）。③巴曲酶组有1例、对照组有2例出现脑梗死复发（P〉0．05）。巴曲酶组未发生药物过敏，颅内、消化道出血等不良事件。结论巴曲酶有助于改善VCI患者的认知功能，提高患者的日常生活能力，药物安全性良好。     

HIV抗体阴性结核性脑膜炎患者治疗前后外周血CD细胞水平的变化情况

目的: 分析HIV抗体阴性结核性脑膜炎(tuberculous meningitis,TBM)患者抗结核治疗前后外周血CD细胞水平的变化及临床意义。方法: 采用前瞻性研究的方法,选取2016年3月至2020年2月于新疆医科大学第八附属医院就诊且符合入组标准的102例TBM患者作为研究对象,其中,临床分期Ⅰ期22例、Ⅱ期37例、Ⅲ期43例。于研究对象抗结核治疗前及治疗2周后,检测其外周血CD3⁺、CD4⁺、CD8⁺T细胞计数及CD4⁺/CD8⁺T细胞比值。分析研究对象治疗前后外周血CD细胞水平变化情况,及其与TBM临床分期和患者治疗转归的相关性。结果: 抗结核治疗2周后,研究对象CD3⁺、CD4⁺ T细胞计数和CD4⁺/CD8⁺ T细胞比值[分别为(808.27±183.25)×10⁶个/μl、(413.09±134.53)×10⁶个/μl和1.23±0.29]均明显高于治疗前[分别为(631.38±150.14)×10⁶个/μl、(366.78±98.03)×10⁶个/μl和0.99±0.23],差异均有统计学意义(t=7.541,P=0.000;t=2.809,P=0.005;t=6.548,P=0.000)。抗结核治疗2周后,Ⅲ期TBM患者的CD3⁺、CD4⁺T细胞计数与CD4⁺/CD8⁺T细胞比值[分别为(613.23±140.29)×10⁶个/μl、(342.53±98.36)×10⁶个/μl、0.95±0.18]明显低于Ⅱ期患者[分别为(753.33±153.47)×10⁶个/μl、(399.57±112.26)×10⁶个/μl、1.22±0.21]和Ⅰ期患者[分别为(989.23±194.35)×10⁶个/μl、(501.11±139.25)×10⁶个/μl、1.42±0.31],差异均有统计学意义(F值分别为40.875、13.372、32.151,P值均为0.000)。抗结核治疗2周后,病情好转患者的CD3⁺、CD4⁺ T细胞计数与CD4⁺/CD8⁺T细胞比值[分别为(941.25±204.17)×10⁶个/μl、(487.35±134.25)×10⁶个/μl、1.36±0.31]明显高于病情恶化者[分别为(683.43±155.76)×10⁶个/μl、(389.64±120.38)×10⁶个/μl、1.02±0.19],差异均有统计学意义(t=4.206,P=0.000;t=2.394,P=0.018;t=3.698,P=0.000)。结论: TBM患者抗结核治疗2周后,免疫功能明显改善,且病情好转患者免疫功能改善程度好于病情恶化者。TBM患者临床分期越高,免疫功能受损越严重,对调整治疗方案的需求越高。     

胆囊收缩素对豚鼠近端结肠平滑肌的作用及其机制

目的 通过记录胆囊收缩素(CCK)对近端结肠平滑肌条和平滑肌细胞膜离子通道电流的影响,研究其对结肠动力的影响及其在肠易激综合征(IBS)发病中可能存在的病理机制.方法 成年豚鼠(200～250 g)实验前禁食12 h,不禁水.处死动物取近端结肠约6 cm,记录离体近端结肠肌条在浓度为1×10-7、5×10-7、1×10-6mol/L的胆囊收缩素八肽(CCK-8)作用下的张力和收缩频率变化;用EPC-10膜片钳和图像分析软件系统检测1×10-7、5×10-7、1×10-6 mol/L CCK-8及经尼非地平预处理的1×10-6mol/L CCK-8对近端结肠平滑肌细胞钙依赖钾通道电流(1BKca)的影响.结果 结肠平滑肌肌条实验中,分别加入1×10-7、5×10-7、1×10-6mol/L CCK-8后正常的收缩活动明显增强,与加药前[(0.68±0.12)g]相比,收缩幅度分别增加(15.0±1.5)%、(28.0±1.4)%和(36.0±1.6)%(n=7,P值分别=0.023、0.005和0.001),但频率变化不明显.膜片钳实验中,当越阶刺激为+60 mV时加入1×10-7、5×10-7、1×10-6mol/LCCK-8,此时IBKCa电流分别为对照组的(117.45±3.60)%、(125.42±5.30)%和(136.98±6.80)%(n=7,P值均＜0.01).预先加入尼非地平后,1×10-6mol/L CCK-8组+60 mV时IBKca为对照组的(102.23±5.60)%(n=7,P=1.491).结论 CCK通过促进Ca2+内流,增加Ibkca,进而增强结肠平滑肌的运动,主要表现为收缩幅度的加快.

Abstract：

Objective To investigate the effect of cholecystokinin (CCK) on colon motility and its mechanism in development of irritable bowel syndrome via recording ionic channels currents and contraction of guinea-pig proximal colon. Methods The guinea-pigs (body weight ranged from 200 g to 250 g) were deprived of food, but not water, for 12 hours before experiment. The animal was sacrificed and 6 cm of proximal colon was obtained. The contractile activity of isolated proximal colon in 1 × 10-7 ,5 × 10-7 or 1 × 10-6 mol/L of CCK-8 solution was recorded. The impact of 1 × 10-7 , 5 × 10-7 and 1 × 10-6 mol/L of CCK-8 and 1 × 10-6 mol/L CCK-8 nifidipin on current of calcium activated potassium channel (IBKac) was detected with an EPC-10 amplifier and an image analysis software.Results In comparison with blank [(0. 68 ±0. 12) g], the amplitude of colon contraction in 1 × 10-7 ,5×10-7 and 1×10-6 mol/L of CCK-8 was increased by (15. 0±1.5)%,(28. 0±1.4)%, and (36.0±1.6) %, respectively ( n = 7, P = 0. 023,0. 005 and 0. 01 ), but there was no significant change of frequency. When exogenous stimulation at +60 mV, the current of IBKac was enhanced to (117. 45 ± 3.60)%, (125.42± 5. 30)% or (136. 98±6. 80)% in 10-7 ,5 × 10-7 or 10-6 mol/L of CCK-8,respectively, compared with controls (n= 7, P＜0.01 ). However, after adding nifidipin, the current of IBKca was reduced to (102.23±5.60)% in 10-6mol/L of CCK-8 at +60 mV when compared with controls (n=7, P= 1. 491 ). Conclusion CCK enhances proximal colonic motility by increasing Ca2+ influx and IBKac current, which is characterized by enhancement of amplitude of contraction.