Superantigens are potent activators of T cells,causing rapid and massive proliferation of T cells and superantigen-dependent-cell-mediated cytotoxicity with extremely low doses.However such antitumor effects lack selectivity.Thus with the methods including monoclonal antibody targeting or binding superantigens to the surface of tumor cells as well as genetic engineering,scientists have done lots of work on targeted therapy of malignancies with superantigen.

Objective To investigate the effect of chest physiotherapy (CPT) on patients undergoing mechanical ventilation (MV).Methods A prospective randomized controlled trial (RCT) was conducted. Sixty-eight adult patients undergoing invasive MV over 48 hours admitted to intensive care unit (ICU) of Affiliated Hospital of Zunyi Medical College from December 2014 to October 2016 were enrolled, and they were divided into CPT group (n = 37) and control group (n = 31) by random number table. The patients in control group received routine physical therapy; while those in the CPT group received comprehensive CPT including manual lung inflation, vibration expectoration and early functional exercise etc. on the basis of the treatment in control group. Acute physiology and chronic health evaluation Ⅱ (APACHE Ⅱ) score and oxygenation index (PaO2/FiO2) before and after the treatment in both two groups were observed as well as the respiratory function and vital signs before and after CPT. The laboratory indicators after treatment, incidence of complications, duration of MV and the length of ICU stay in the two groups were recorded.Results The incidence of ventilator associated pneumonia (VAP) in the CPT group was significantly lower than that of control group (5.4% vs. 25.8%,P < 0.05), the patients in control group also had atelectasis, deep vein thrombosis and other complications, while no such complications were found in the CPT group. The duration of MV (hours: 77.4±41.0 vs. 133.9±117.2) and the length of ICU stay (hours: 134.4±71.4 vs. 207.4±177.7) in CPT group were significantly shorter than those of the control group (bothP < 0.05). There was no significant difference in APACHE Ⅱ score and PaO2/FiO2 before treatment between the two groups. After treatment for 2 days, the APACHE Ⅱ score in both groups was gradually decreased, and that in CPT group was more significantly, it was significantly lower than that of control group after treatment for 4 days (8.6±3.9 vs. 12.5±5.3,P < 0.05). The PaO2/FiO2 in the two groups was gradually increased after treatment. PaO2/FiO2 in CPT group was significantly increased at 3 days after treatment as compared with that before treatment [mmHg (1 mmHg = 0.133 kPa): 278.1±79.0 vs. 224.2±98.9], while PaO2/FiO2 in the control group did not appear significantly increased until after 4-day treatment (mmHg: 302.3±93.1 vs. 232.3±116.7, both P < 0.05). There was no significant difference in vital signs andrespiratory function parameters including tidal volume (VT), respiratory rate (RR), peak airway pressure (Ppeak) and mean airway pressure (Pmean) before and after treatment in CPT group excepting pulse oxygen saturation (SpO2) was significantly higher than that before treatment (0.985±0.016 vs. 0.978±0.018,P < 0.05), indicating that CPT treatment did not cause fluctuations in respiratory function and vital signs. Blood lactate in CPT group was significantly lower than that of control group (mmol/L: 1.10±0.79 vs. 1.32±1.09, P < 0.05), indicating that CPT treatment, especially early functional exercise, could improve the oxygen supply and limb circulation.Conclusion CPT treatment has some effect on prevention of VAP and other complications in patients undergoing MV, which could shorten the duration of MV and the length of ICU stay, and promote the recovery of patients.

Based on avian leukosis virus ( ALV) p19 gene terminal nucleotide sequence, a 82 bp double-stranded DNA fragment was chemically synthesized and cloned into the expression vector pGEMEX-1. The sequencing result indicated th at the cloned fragment was a correct version of the one designed both in nucleot ide sequence and in its open reading frame. The recombinant was used to transfor m E.coli BL21 (DE3). The cloned fragment was expressed as a fused protein wi th T7 gene 10 leader peptide and was shown to be 34 kD in size on SDS-PAGE gel when induced with 1 mmol/L IPTG. The expression product was able to bind immunol ogically to rabbit anti-ALV serum in Western-blot assay and is being tested to differentiate exogenous from endogenous ALV.

This review introduces the mechanism and advantages of laser acupuncture and moxibustion, the biological effect of low-level laser, the characteristics of acupuncture point area and the experimental laws of biological effect.On this basis, the existing problems in clinical application of laser acupuncture and laser acupuncture apparatus are pointed out.The combination therapy method with various wavelength are also discussed, and future development directions in the study are prospected.

Adult ; Aged ; Angiomyolipoma ; diagnosis ; diagnostic imaging ; Carcinoma, Renal Cell ; diagnosis ; diagnostic imaging ; Diagnosis, Differential ; Female ; Fibroma ; diagnosis ; diagnostic imaging ; Humans ; Kidney Neoplasms ; diagnosis ; diagnostic imaging ; Leiomyosarcoma ; diagnosis ; diagnostic imaging ; Male ; Mesenchymoma ; diagnosis ; diagnostic imaging ; Middle Aged ; Tomography, Spiral Computed ; methods

Aim To investigate glutamate-induced [ Ca2 + ] i changes in cultured rat neonatal cortical astrocytes after hypoxia/reoxygenation, H2O2 or high concentration of L-glutamate injury. In the meantime, the effects of Gingko biloba extract (GbE) were examined. Methods [ Ca2+ ]i changes in astrocytes were monitored by laser scanning confocal microscopy with the Ca2+ sensitive fluorescent probe [ Ca2 + ] i, but decrease by ( 3.3 ± 1.6) %, (81 ± 11 ) % and ( 81 ± 7 ) %, respectively. Pretreatment with H2O2 or high concentration of L-glutamate injury were ( 135 ± 98 ) %, ( 117 ± 93 ) % and ( 89 ± 36) %,different injury. Conclusion Hypoxia/reoxygenation, H2O2 and high concentration of L-glutamate impaired astrocytes' response to exogenous L-glutamate, and then bidirectional communication between astrocytes and neurons could not take place. GbE could improve the abnormal responses and maintain the normal function of astroglical network. These effects support that GbE has potential beneficial actions against brain injury.

Medical imaging involves not only the multidisciplinary knowledge,but also the concurrent updating of the knowledge system related to the imaging technology development.In this case,it's an important issue how to guarantee the teaching quality of the medical imaging postgraduate education effectively and cultivate the professsionals with higher comprehensive quality in the limited teaching time available.Thus the implementation as well as the teaching effects of the reading report in the promotion of medical imaging postgraduates' research ability and comprehensive quality is needed to be discussed from the accumulation and update of knowledge system.

Objective To explore the corresponding relationship between isolated Q waves in lead Ⅲ on the electrocardiography(ECG) and echocardiographie segmental diagnosis of myocardial infarction(MI).Methods The shape magnitude of Q waves of 27 patients with MI and the relationship with eehocardiographie features were investigated. Results Twenty-four patients with inferior wall myocardial infarction had close relationship with isolated Q waves in lead Ⅲ on the ECG. Conclusions There is definite corresponding relation between isolated Q waves in lead Ⅲ and inferior wall myocardial infarction.

This study is to investigate the effects of ubenimex on tumor cell invasion and apoptosis, dose relationship and mechanism. Immunofluorescence staining was performed to detect the expression of CD13 in HT-1080 cells. MTT assay was used to analyze the effect of ubenimex on cell proliferation. Annexin V-EGFP/PI was used to detect apoptotic cells by flow cytometry. Cell cycle was analyzed using flow cytometry. Ala-pNA was used as substrate to evaluate the effect of ubenimex on the aminopeptidase activity. Transwell assay was used to analyze the effect of ubenimex on cell invasion and migration ability. Western blotting was used to detect the expression level of CD13. MMP activity was analyzed using gelatin zymography. The results showed that ubenimex at high concentration inhibited the proliferation of HT-1080 cells (IC50: 3.8 mg x mL(-1)), and induced cell apoptosis. Cell cycle was blocked at G1 phase. Ubenimex at low concentration inhibited the aminopeptidase activity of HT-1080 cells (IC50: 8.3 microg x mL(-1)) and inhibited cell invasion, but it had no effects on the cell migration and proliferation. Ubenimex had no effects on CD13 expression and MMP activity. In conclusion, ubenimex at low concentration can inhibit the invasion ability of tumor cells by directly inhibiting the aminopeptidase activity; ubenimex at high concentration can inhibit the proliferation of tumor cells and induce cell apoptosis by a CD13-independent pathway.

Objective To investigate the influence of fixation of both lower limbs with negative pressure vacuum cushion and fixation of both ankles with self-made foam mat on setup errors in radiotherapy for rectal cancer.Methods A total of 12 patients with rectal cancer were enrolled in 2014 and randomly divided into group A (using negative pressure vacuum cushion) and group B (using self-made foam mat).An offline registration analysis was performed for the images of 108 times (A,B group of 54 times) of kilovoltage cone-beam CT (CBCT) before and after treatment.Grey scale translation error registration was used,and the results of registration were analyzed.The setup errors in x-axis (left-right direction),y-axis (cranial-caudal direction),and z-axis (anterior-posterior direction) were compared between the two groups.Results There was no significant difference in the absolute setup error in the y-axis between the two groups (2.13±0.64 mm vs.2.61±1.17 mm,P=0.399),while group A showed significantly lower absolute setup errors in the x-axis and z-axis than group B (x-axis:1.51±0.28 mm vs.2.70±1.05 mm,P=0.039;with an error rate of 7.41％ vs.42.59％;z-axis:1.10±0.29 mm vs.2.37±0.71 mm,P=0.002;with an error rate of 1.85％ vs.35.19％).Conclusions In the radiotherapy positioning for rectal cancer,fixation of both lower limbs with negative pressure vacuum cushion effectively avoids the translation and rotation of both lower limbs,reduces absolute setup errors,and has higher accuracy than fixation of both ankles with self-made foam mat.