Objective To explore the effect of DNA methylation inhibitor 5-aza-2'-deoxycytidine (5-Aza-CdR) on proliferation and tumor suppressor gene PRDM1α expression in Burkitt's lymphoma cell line NAMALWA. Methods MTT was used to study the impact of DNA methylation inhibitor on proliferation in NAMALWA cells,and comparative real-time reverse transcription-polymerase chain reaction (RQ-PCR) with SYBR Green assay was used to detect PRDM1α gene expression. Results MTT results showed that 5-AzaCdR inhibited proliferation of NAMALWA cells in a dose-dependent manner.After treated with 5-Aza-CdR for 72 h at 0.01,0.0625,0.1,0.125,0.25,0.5,1,2 and 4 μmol/L,the inhibition rates were 21.93 ％,39.23 ％,47.69 ％,50.37 ％,53.54 ％,57.72 ％,62.31％,65.68 ％,67.87 ％,respectively,and the differences of absorbance among the groups were also statistically significant (all P＜ 0.01). Meanwhile, 5-Aza-CdR could induce the re-expression of PRDM1α, and △Ct of 0.5, 1, 2 μmol/L groups showed significant differences compared with control group (all P ＜ 0.05). Conclusion DNA methylation inhibitor 5-Aza-CdR can significantly inhibit the proliferation of Burkitt' s lymphoma cell line NAM ALWA,and the possible mechanism of this inhibition may be induction of demethylation and re-expression of PRDM 1α.

Objective:To explore the effect of different doses of lidocaine on recovery quality of patients with iodine-deficiency goiter after general anesthesia resection.Methods:Using a prospective design, 108 patients who underwent iodine-deficiency goiter resection in Yantai Yeda Hospital from April 2018 to April 2020 were selected as the research subjects. The patients were divided into control group (normal saline), lidocaine group A (1 mg/kg) and lidocaine group B (2 mg/kg) by random number table method, 36 cases in each group. The corresponding dose of lidocaine or the equivalent dose of normal saline was pumped into the vein after anesthesia induction and intubation for 30 minutes. The changes in the diastolic blood pressure (DBP), systolic blood pressure (SBP) and blood glucose (GLU) levels of the three groups were observed before administration, immediately after the operation, immediately after opening the eyes, immediately after extubation, and 10 minutes after extubation; at the same time, arousal and restlessness score (RS), sedation score (Ramsay), visual analogue score (VAS) and adverse reactions(coughing, nausea and vomiting, respiratory depression) occurrence were recorded.Results:At the moment of eye opening, immediately after extubation and 10 minutes after extubation, DBP (mmHg: 77.26 ± 4.85, 73.45 ± 4.37, 70.94 ± 4.45, 83.53 ± 6.19, 77.86 ± 5.33, 74.14 ± 5.20, 73.86 ± 5.73, 68.41 ± 5.16, 63.09 ± 5.24), SBP (mmHg: 129.17 ± 6.54, 121.25 ± 6.07, 116.24 ± 5.86, 137.48 ± 6.62, 129.53 ± 6.38, 123.07 ± 6.25, 125.65 ± 6.13, 117.48 ± 6.09, 108.17 ± 6.04), GLU level (mmol/L: 5.83 ± 0.36, 5.37 ± 0.29, 5.12 ± 0.26, 6.69 ± 0.34, 5.84 ± 0.30, 5.57 ± 0.27, 5.61 ± 0.32, 5.25 ± 0.31, 4.97 ± 0.28) of lidocaine group A and lidocaine group B were significantly lower than those of control group, the difference were statistically significant ( F=17.520, 25.755, 36.034, 41.028, 45.525, 74.330, 10.397, 49.756, 52.348, P < 0.05); among them, the DBP, SBP and GLU levels of lidocaine group A and lidocaine group B were lower than those of control group, and lidocaine group B was lower than lidocaine group A ( P < 0.05). The RS and VAS of lidocaine group A and lidocaine group B were significantly lower than those of control group, and Ramsay was higher than that of control group ( P < 0.05); and the RS and VAS of lidocaine group B were lower than those of lidocaine group A, the Ramsay was higher than that of lidocaine group A ( P < 0.05). The incidence of coughing, nausea and vomiting in lidocaine group A and lidocaine group B were lower than those in the control group ( P < 0.05); and there was no respiratory depression in the three groups. Conclusions:Thrity minutes after induction of anesthesia, continuous pumping of 2 mg/kg lidocaine can maintain blood pressure and GLU of patients undergoing general anesthesia for iodine-deficiency goiter, and effectively reduce restlessness, pain and adverse reactions during the recovery period. It is a satisfactory dose for thyroid surgery patients to wake up and comfortably.

Objective To observe the effect of porphyra yezoensis polysaccharide (PYP) on cerebrum tissue of diabetic rats and apoptosis. Methods 60 Wistar rats were randomly divided into normal control group, diabetic model group, and treated groups respectively with PYP (0.25 g/kg × d), PYP (0.5 g/kg × d), and PYP (1 g/kg × d). The cerebrum pathologic changes were observed by HE staining method, and the number of apoptotic cells was observed by electrophoresis and the mRNA expression of p53 and bcl-2 was confirmed by RT-PCR. Results PYP improved the cerebrum pathologic changes of diabetic rats. With comparison to the diabetic model group, the cerebrum pathologic change in the treated groups also improved. And the number of apoptotic cells, the expression of p53 in cerebrum tissue decreased and expressions of bcl-2 rose. Conclusion PYP can decrease the expression of p53 in cerebrum tissue and rise expressions of bcl-2 so as to protect brain tissues from cerebral ischemia.

目的探讨出院指导对脑卒中偏瘫患者日常生活活动能力(ADL)恢复的影响。方法 60例住院的脑卒中偏瘫患者在出院前随机分成指导组与对照组,出院后前者除对症服药治疗外,还给予出院后的康复训练指导,后者只给予对症服药治疗。在出院前2—3d及出院3个月后对两组患者进行ADL评定。结果指导组患者的ADL评分高于对照组(P<0.05)。结论出院康复指导对脑卒中偏瘫患者ADL的恢复有良好作用。

Objective To introduce the clinical experience and investigate the significance and safety of harmonic scalpel combined with meticulous capsular dissection technique in thyroidectomy.Methods A retrospective analysis was performed on 275 patients who underwent thyroidectomy among which 135 patients were treated by capsular dissection technique and harmonic scalpel (harmonic scalpel group),the other 140 patients were treated by electric knife and traditional ligation (traditional group).The thyroidectomy operative time,intraoperative bleeding volume,postoperative drainage volume and surgical complications were compared between two groups.Results In harmonic scalpel group,the thyroidectomy operative time of total thyroidectomy and subtotal thyroidectomy was significantly shorter than that in traditional group [(50.0±6.9) min vs.(82.0± 14.4) min,(39.9±6.6) min vs.(73.1 ± 14.5) min](P＜0.01).The intraoperative bleeding volume of total thyroidectomy and subtotal thyroidectomy in harmonic scalpel group was significantly lower than that in traditional group [(18.7 ± 10.9) ml vs.(41.9 ± 15.6) ml,(17.7 ± 9.3) ml vs.(42.2 ± 14.6) ml] (P ＜ 0.01).The postoperative drainage volume of total thyroidectomy and subtotal thyroidectomy in harmonic scalpel group was significantly lower than that in traditional group [(40.7 ± 11.7) ml vs.(53.9 ± 17.5) ml,(42.7 ± 14.5) ml vs.(61.8 ±22.9) ml](P＜0.01).The rate of temporary hypoparathyroidism and temporary recurrent laryngeal nerve palsy had no significant difference between two groups (P ＞ 0.05).Conclusions Application of harmonic scalpel combined with meticulous capsular dissection technique in thyroidectomy can significantly reduce thyroidectomy operative time,intraoperative bleeding volume,postoperative drainage volume and surgical complications.Harmonic scalpel combined with meticulous capsular dissection technique in thyroidectomy should be widely used.

OBJECTIVE:To study the possible mechanism of Bushenshengsui I(BSSS I),a kind of compound Chinese herbs,in treatment of aplastic anaemiaMETHODS:The animal model of mice with aplastic anaemia was established by 60Co irradiationThe therapeutic effects of BSSS I on aplastic anaemia were observed with the changes of peripheral blood cell count,bone marrow GM-CFU-c and activities of blood IL-1,IL-2 and IL-6RESULTS:After treatment with BSSS I,the peripheral blood cell count,amount of bone marrow karyocyte and GM-CFU-c of bone marrow of the aplastic anaemia mice elevated markedly,and the blood IL-1 and IL-6 activities increased obviouslyThe levels of IL-6 increased to the level of normal and showed positive relationship with IL-1(r=0904)The levels of IL-2 of the treatment group showed a decrease but with no significant differencesCONCLUSION:The results showed that BSSS I may improve the function of hematopoiesis by elevating the peripheral blood cells and the amount of bone marrow karyocytes,accelerating GM-CFU-c of bone marrow,and through moderating the activities of IL-1,IL-2,IL-6

Objective To investigate the protection of panax notoginseng saponins(PNS) against ischemia reperfusion injury by liver graft in rats.Method The experimental rat model of orthotopic liver transplantation was set up according to Kamada's technique and the rats were randomly divided into three groups: normal saline control group(group N),PNS preconditioning group(group P) and sham-operated groups(group S).The expression levels of NF-?B and intercellular adhesion molecule-1(ICAM-1) were detected by immunohistochemistry and the filtration of polymorphonuclear neutrophils(PMNs) was measured with myeloperoxidase(MPO) enzyme method in 2h,6h and 24h after ischemia reperfusion respectively.The activities of alanine aminotransferase(ALT) and aspartate aminotransferase(AST) in the serum were also detected.Result The activation of NF-?B in group N increased significantly at 2h after reperfusion and then decreased.The expression level of ICAM-1 increased significantly at 2h after reperfusion,and reached its peak level at 6h in group N.The expression level of ICAM-1 was significantly lower in group P than that in group N(P

Objective To explore the diagnostic value of serum miRNA-182 in colorectal cancer(CRC).Methods A total of 53 CRC patients were enrolled in this study,serum miRNA-182 was detected by quantitative real time polymerase chain reaction(qRT-PCR).The results were compared with those of patients with benign intestinal diseases and healthy controls.Results The content of serum miRNA-182 in CRC patients was significantly higher than those in patients with benign intestinal diseases and healthy group(P<0.05).The ROC curve showed that the area under the curve of serum miRNA-182 was 0.846,the confidence interval was 0.768-0.925,the diagnostic sensitivity was 77.1%,and the specificity was 81.1%.Serum miRNA-182 levels were correlated with TNM stage(P=0.011) and distant metastasis(P=0.002) in patients with CRC,but no significant correlation with other clinical parameters(P>0.05).Serum miRNA-182 level in CRC patients after surgery was significantly lower than that before operation(P<0.01),and which was significantly higher in patients with recurrence/metastasis after surgery(P=0.019).Conclusion Serum miRNA-182 level increased significantly in CRC patients,and which was closely related to the disease and malignant progression,serum miRNA-182 could be used as a potential marker for clinical diagnosis and disease evaluation of CRC.

Objective To investigate the effectiveness of Ender nail fixation in the management of pediatric femoral shaft fractures. Methods A total of 24 children with femoral shaft fracture underwent small incision Ender nail internal fixation followed by 4 weeks of monolateral hip spica-cast immobilization. Results Follow-up observations for 6~24 months revealed no non-union or delayed union. The affected limbs were found within 1 cm shorter or longer than the contralateral in 4 cases. None became lame, and the functions of lower limbs were completely recovered. Conclusions So far as indications and contra-indications of Ender nail fixation are strictly followed, this treatment for femoral shaft fractures in children of age 5~10 years gives characters of small incision, anatomic reduction, unimpaired periosteum, short hospital stay, and quick functional recovery.

Objective To examine the effects of nitroglycerin tolerance on the following myocardial ischemia reperfusion injury (MI/R). Methods Male Sprague-Dawley rats were rardomly subjected to either one of the following treatments: GTN 600 ?g/(kg/h) or saline infusion for 12 h. GTN tolerance was determined with the measurement of mean arterial blood pressure (MABP) and isolated arterial tension. All the GTN-tolerated and the control rats were subjected to 40 min of ischemia followed by 4 h of reperfusion. Myocardial apoptosis (TUNEL analysis), myocardial infarction size (Evans blue-TTC stain), plasma creatine kinase (CK) and lactate dehydrogenase (LDH) activity were determined. Results Nitrate tolerance aggravated MI/R injury as evidenced by increased myocyte apoptosis and infarction size and plasma CK, LDH activity. However, sole GTN tolerance without MI/R injury failed to show any deleterious effect on rat heart. Conclusion GTN tolerance may exert a “potential" deleterious effect on the ischemic hearts.