Combined Modality Therapy ; High-Frequency Ventilation ; Humans ; Liquid Ventilation ; Nitric Oxide ; therapeutic use ; Pulmonary Surfactants ; therapeutic use ; Respiration, Artificial ; Respiratory Insufficiency ; therapy

Background Perineural invasion is an important biological character for adenoid cystic carcinoma (ACC) of lacrimal gland,which is different from those of other lacrimal gland tumors.As the important part of neurotrophic factors,glial-derived neurotrophic factor (GDNF) plays an important role in perineural invasion for ACC of salivary gland.GDNF regulation in the ACC cell biology function needs to be further explored.Objective This study was to investigate the effect of GDNF on proliferation and migration of ACC cells,and to explore the mechanism of neural invasion in ACC of lacrimal gland.Methods ACC-2 cell line was cultured and passaged in RPMI 1640 medium with 10％ fetal bovine serum,100 U/ml penicillin and 0.1 g/L streptomycin.Single-cell suspension was prepared with the density of 2×104/ml using logarithmic phase of cells and then incubated to 96-well plate.GDNF with the final concentration of 20,60,80,100 and 120 μg/L was added into the medium respectively in the experimental groups,and the cells were cultured in the medium without GDNF as the control group.The expression of GDNF in ACC-2 cells was detected by immunohistochemistry.MTT assay was employed to assay the absorbance value at the wavelength of 570 nm (A570) for the evaluation of proliferation of ACC-2 cells after cultured by different concentrations of GDNF for different time points.Meanwhile,transwell chamber was used to examine the cell migrated number.Results Immunochemistry assay exhibited that ACC-2 cells showed the positive response for GDNF with the brown staining in the cytoplasm.In 48 hours after culture,the A570 value was elevated with the increase of GDNF concentration,showing a significant difference among various groups (F =3.336,P =0.026),and the A570 value in various concentrations of GDNF groups was higher than that of 0 μg/L GDNF group (all P＜0.05).After action of 80 μg/L GDNF,the A570 value of the cells was gradually increased with the prolong of culture time (Ftime =39.979,P=0.000).In 30 minutes after GDNF cultured,the number of migrated cells increased with the increase of GDNF concentration (F=144.886,P=0.000).ACC-2 cells were cultured by 100 μg/L GDNF for 24,30 and 40 hours,the number of migrated cells were more as the time lapse,and more migrated cells were seen in GDNF group at various time points (Ftime =46.747,P =0.000 ; Fgroup =63.786,P =0.000).Conclusions GDNF can stimulate the proliferation and migration of ACC-2 cells in a dose-and time-dependent manner.

Objective To investigate the cause of severe complications after arterial perfusion for esophageal cancer and the methods of prevention. Methods 368 cases of esophageal cancer were treated with arterial perfusion of drugs for chemotherapy. The treatment numbers were 909 including 215 males and 153 females with the age ranging from 39 to 86. These patients were verified as esophageal cancers histopathologically. Selective angiography of the relevant esophageal segments and drugs for perfusion chemotherapy were undertaken. Results The complications included one case of paralysis due to spinal cord injury, two cases with esophageal perforation and three cases of necrotic esophagitis. The case of paralysis died of original disease one month after the treatment. Of the cases of esophageal perforation, one formed the esophgus-trachea fistula and survived for eight months after being esophageal stent implantation and the other formed esophagus-mediastinum fistula and died of massive hemorrhage after six weeks. Three cases of necrotic esophagitis occurred at the normal segments of the esophagus and formed esophgeal perforation. Of these three cases, one formed esophago-broncheal fistula and survived up to now after creating drainage stoma of stomach. Two cases of the esophgus-mediastinum and esophgus-bronchius fistula died of severe infection. Conclusions Severe complications of esophageal arterial catheterization with drugs for chemotherapy are rare. Less harmful, non-ionization contrast medium, low cellular toxicity drugs for chemotherapy with proper doses and concentrations should be selected together with optimal speed of infusion. Esophageal internal stent placement drainage stoma creation of stomach should be the useful adjunct for severe complications.

Objective To observe the effect of the rivaroxaban and low molecular weight heparin calcium to prevent deep vein thrombosis (DVT) after artificial joint replacement. Methods 167 patients included 114 cases for total hip arthroplasty and 53 cases for total knee replacement from Novermber, 2009 to October, 2010 were divided into two groups: observation group (n=84) was treated with rivaroxaban tablets, 6 h after surgery, 10 mg/d, 2 weeks for knee arthroplasty, 5 weeks for total hip arthroplasty; and control group (n=83) was treated with low molecular weight heparin calcium 2500 IU 2 h before and after surgery for 5 d. Ultrasonography was used to detect the deep vein lumen size change and DVT rate of bilateral lower extremities in all patients before and after surgery. Activated partial thromboplastin time (APTT) was tested before surgery, and 2 d, 5 d, 7 d, 14 d, 35 d after surgery. Results ① Incidence of DVT showed that there were 9 cases (10.7%) with DVT in the observation group; there were 15 cases with DVT (18.1%) in the control group. ② Lower limb deep vein lumen size change comparison: there were 23 cases (27.4%) with superficial femoral vein stenosis more than 2 mm in the observation group while 38 cases (45.8%) in the control group, there were 27 cases (32.1%) with popliteal veins stenosis more than 2 mm in the observation group and 47 cases (56.6%) in the control group (P<0.01). ③APTT: APTT prolonged >10 s was 0 in the observation group while 23 cases (27.7%) in the control group (P<0.01). Conclusion Trivaroxaban may prevent DVT after artificial joint replacement and be better than low molecular weight heparins calcium.

Objective To observe the clinical effect of mouse nerve growth factor on protrusion of the lumbar intervertebral disc (LDP) treated with operation. Methods 60 cases with LDP received posterior lamina resection nucleus pulposus decompression excise pedicle screws fixation, in which 30 cases (the treatment group) accepted mouse nerve growth factor for 30 d. Their symptoms and signs, visual analogue score (VAS) for pain, and the electromyogram were recorded before and after treatment. Results The VAS in the treatment group improved more than in control group (P<0.05). the incidence of cure and improvement (76.7%) was higher than in the control group (50.0%)(P<0.05). The nerve conduction velocity and action potential of main muscle group also improved more in the treatment group (P<0.05).Conclusion Mouse nerve growth factor can improve the recovery of pain as well as the neural function in patients after operation for LDP.

Objective To evaluate the role of 5-HT1A receptors in distal cerebrospinal fluid (CSF)-contacting neurons in neuropathic pain (NP) in rats. Methods Forty male SD rats weighing 230-270 g were randomly divided into 4 groups (n = 8 each): sham operation group (group S); NP group; dimethyl sulfoxide (DMSO) group and 8-OH-DPAT (a specific 5-HT1A receptor agonist) group. NP was induced by chronic constrictive injury (CCI) in groups NP, DMSO and 8-OH-DPAT. Four silk ligatures were placed on the sciatic nerve at 1 mm intervals . In group S, the sciatic nerve was exposed but not ligated. 8-OH-DPAT and DMSO 1 μl were injected into the region where most of CSF-contacting neurons are present over 5 min on 7th day after CCI in groups 8-OH-DPAT and DMSO respectively. Paw withdrawal latency (PWL) and paw withdrawal threshold (PWT) were measured before CCI, on 7th day after CCI, and at 3 and 6 h after administration. The rats were sacrificed 6 h after administration, and the brain tissues removed for determination of the expression of 5-HT1A receptors in the distal CSF-contacting neurons by immunofluorescence. Results Compared with group S, PWL was significantly shorten and PWT decreased at T, in groups NP, DMSO and 8-OH- DPAT (P ＜ 0.01) . Compared with group DMSO, PWL was significantly prolonged and PWT increased at T2 and T3 in group 8-OH-DPAT ( P ＜ 0.01). The 5-HT1A receptor expression was significantly down-regulated in groups NP and DMSO compared with group S, while up-regulated in group 8-OH-DPAT compared with groups NP and DMSO ( P ＜ 0.01). There was no significant difference in 5-HT1A receptor expression between groups NP and DMSO ( P ＞ 0.05). Conclusion 5-HT1A receptors in distal CSF-contacting neurons are involved in the regulation of NP in rats.

Objective To compare the anesthesia and analgesic effect of ropivacaine to lidocaine during and after inguinal hernia repair field.Methods The study was designed as a single-centre,double blind,controlled trial,randomized with two parallel groups.One hundred males scheduled for inguinal hernia repair as day surgery under field block would be eligible to participate and then be randomized to receive field block using 0.75% ropivacaine 30 mL or 1%lidoeaine 40 mL.During the first 24 hours after the start of infiltration,assessments of the time from study drus administration to the first request of additional analgesics,wound pain at rest and on mobilization using NRS,as well as an evaluation of patients'ability to perform day-to-day activities were made.Wound healing would be judged by the assessor as normal or abnormal on day 7 after surgery.Results Median time from study drug administration to the first request of additional analgesics waft,22.4 hours in ropivaeaine group and 15.1 hours in lidocaine group respectively.Although there was no statistically significant treatment difference between groups(P>0.05),clinically relevant differences could be seen in favour of ropivacaine.The HRs(hazard rato) for this variable using Cox regression model showed a tendency favoring ropivacaine in increasing the time from study drug administration to the first request of additional analgesics when comparing ropivacaine group and lidocaine group,with an HR of 0.888(95%CI:0.521-1.514;P>0.05),corresponding to a risk reduction of 11.2%.Postoperative wound pain scores at rest at 2nd hour was lower in ropivacaine group than lidocaine group(P<0.05).Pestoperative wound pain scores upon mobilization in 4th hour and the total scores of day-to-day activity questionnaire in 4th hour were lower in ropivacaine group than that of lidocaine group(P<0.05).No any adverse effects were found in the two groups,and wound healing was normal in all patients in the two groups 7 days after surgery.Conclusion Ropivacaine provides effective peroperative anesthesia and postoperative pain relief for inguinal hernia repair in Chjnese patients.

Objective:To compare the effects of repetitive transcranial magnetic stimulation (TMS) at three different relatively high frequencies on neuropathic pain so as to find the best frequency.Methods:One hundred Sprague-Dawley rats were randomly divided into a sham operation group, a model group, a TMS group and a control stimulation group. The TMS group was further divided into a 5Hz group, a 10Hz group, and a 20Hz group. The rats in the model, control stimulation and TMS groups received constriction injury of the sciatic nerve, while the rats in the sham group were given a sham version of the operation. On the third day after the operation the rats in the TMS group and the control stimulation group began to receive TMS treatment. Neuropatic pain was evaluated on the day before the operation, and on the 3rd, 5th, 7th, 10th and 12th days after the operation. The evaluations included the paw withdrawal thermal latency (PWTL) and the paw withdrawal mechanical threshold (PWMT).Results:The average PWTLs and PWMTs in all of the TMS groups increased with the TMS treatment. Those of the 10Hz and 20Hz groups were significantly higher than the 5Hz group′s average, while there were no significant differences between the 10Hz group and 20Hz group.Conclusions:High-frequency TMS at different frequencies has different effects on neuropathic pain, at least in rats. The treatment efficacy at 10 and 20Hz is superior to that at 5Hz.

Objective To investigate the effect of Roux-en-Y gastric bypass surgery on renal gluconeogenesis, and to explore the mechanism of improving glucose control and insulin sensitivity in obese rats.Methods Rats were randomly divided into the obese group (n=30) consumed high-fat diet (HFD) and control group (NC group, n=8).Top 24 of animals fed HFD by change in body mass were subdivided into three groups: obese control group (OB group, n=8), obese under RYGB group (RYGB group, n=8) or sham-operation (sham group, n=8).Intraperitoneal glucose tolerance tests (IPGTT) were performed meanwhile the AUC of blood glucose concentration-time after surgery.Fasting glucose, insulin and lipid were measured respectively and HOMA-IR were calculated.The mRNA level and protein level of the key enzymes (G6P and PEPCK) of renal gluconeogenesis were examined with RT-PCR and Western blot respectively.Results Compared with OB group and Sham group, the body mass, lipid, blood glucose, insulin, HOMA-IR and AUG were significantly decreased (P<0.05), the expression of G6P and PEPCK mRNA and protein were significantly reduced(P<0.05) in RYGBgroup.Conclusions Roux-en-Y gastric bypass surgery can improve glucose control and insulin resistance, which may be related to the decreased level of mRNA, protein of G6P and PEPCK, reduced gluconeogenesis and glucose output in renal cortex.