Objective To observe the influence of the orthosis combined with functional training on patients' walking ability. Methods In different rehabilitation training stages, 36 patients, 11 cases of lumbar enlargement spinal cord injury (SCI), 25 cases of cerebrovascular accident (CVA) and head injury (HI), received strengthened training with ankle-food orthoses (AFO) for 6 weeks. And then, scores of ASIA, FMA and walking function in limited time (including 6 minute walking measures and 10 meters walking time measures) were evaluated respectively at admision, before and after applying AFO for 6 weeks. Results There was a significant difference in patients' walking function scores between before and after AFO training (P<0.01). However, SCI patients' ASIA scores have no significant changes after applying AFO for 6 weeks (P>0.05). In additional, HI patients' walking function scores after applying AFO for 6 weeks were more different from the scores at admision (P<0.01), and before AFO training (P<0.05). Conclusion AFO combined with functional training can obviously recover lumbar enlargement SCI and HI patients' walking ability.

Objective　To avoid misdiagnosis and misapplied therapy of acoustic neuroma. Methods　92 cases of acoustic neuroma treated between 1983 and 1997 were retrospectively reviewed. Among them, 20 patients (21 ears, 21.7%) presented with sudden hearing loss as the starting symptoms. The diagnosis was based on audiological and radiologic examinations. Results　The clinical and audiological analysis demonstrated that 57.1% of the ears showed hearing loss over 71 dBHL, and all ears had deteriorated ABRs. Acoustic reflex was nonreactive in all 10 ears tested. Positive findings in CT scan were 88.89%. CT pneumoencephalography or MRI provided useful information of diagnosis in those with negative findings of plane CT scan. Conclusion　ABR should be used as a routine test for patients with sudden deafness. When ABR was abnormal, CT scan around the internal auditory meatus was needed.

VP1 gene encoded by the newly identified caprine enterovirus CEV-JL 14 was amplified and cloned to prokaryotic expression vector pGEX-4T-1.Recombinant GST-VP1 fusion protein was expressed,purified,emulsified with Freund's complete adjuvant and used to immunize the BALB/c mice following a standard procedure.The spleen cells from immunized mice were collected and fused with myeloma cells after its antibody titer reached over 104 times detected by indirect ELISA.Hybridoma cell clones secreting monoclonal antibodies against VP1 were screened and their stability and specificity were further determined.The identified hybridoma cells were injected to mice intraperitoneally and ascites were collected at 7 DPI.Isotypes of the monoclonal antibodies against the recombinant VP1 protein were characterized to be either IgG1 or IgG2b,which showed a high specificity for detection of caprine enterovirus antigens by immunoperoxidase monolayer assay,thus laying a solid basis for future study related to viral pathogenesis,detection and diagnostics for caprine enterovirus infection.

The non-contact life parameters detecting systems can detect many important life parameters such as heartbeat and breathing at certain distance. In practice, the self-dithering interference of the system is produced by some factors; it makes the signal-to-noise ratio (SNR) of the recorded signal lower. This paper is discussed an adaptive technology based on a variable step-size LMS algorithm, which is used to eliminate the self-dithering interference of the system and hence to raise the SNR of the detecting signal. A method to obtain the reference signal by vibration sensor is brought forward and the optimum parameters settings are discussed. The results show that the reference signal is an integral part of output signal of the vibration sensor and has a relationship with the setting direction of the sensor. The conclusion is that the method is effective and feasible; also the algorithm is well convergent.
Algorithms ; Data Interpretation, Statistical ; Electrophysiology ; methods ; Equipment Design ; Heart Rate ; physiology ; Models, Biological ; Reference Values ; Respiration ; Signal Processing, Computer-Assisted ; Software

Objective To provide experimental materials for exploring the function of breast cancer susceptibility gene 2(BRCA2) gene by establishing of an mouse immortalized mammary gland epithelial cell line as a cell model system.Methods In this study,the primary mouse mammary epithelial cells were isolated and purified by enzyme digestion and differential centrifugation.The resulting primary mouse mammary gland epithelial cells were transducted with lentivirus expressing human telomerase (hTERT) gene,and screened by hygromycin B.The surviving epithelial cells were further characterized by morphology observations and cytokeratin marker detection.Results Immortalized mouse mammary epithelial cells were obtained by infection of MMECs with lentivirus expressing human telomerase(hTERT) gene,screened by hygromycin B.Morphology observations and detection of the cytokeratin marker showed the immortalized MMECs had a typical morphology of luminal epithelial cells with strong expression of cytokeratin 14.Conclusion An immortalized mouse luminal epithelial cell line is successfully established with an uniform morphology,which provides a cell model system for the future exploration on BRCA2-related tumorigenesis.

Objective:To investigate the clinical features and influencing factors of early-onset gout.Methods:Male patients with gout admitted to Department of Endocrinology and Metabolism were recruited from 2015 to 2018. Patients with gout onset before age 30 were defined as the " early-onset" group, and those with onset at 30~60 years were defined as the "late-onset" group. Clinical characteristics were compared between two groups. Factors associated with early-onset gout were analyzed.Results:A total of 1 243 male patients were enrolled in this study; 480 individuals were in the early-onset, and 763 in the late-onset groups. Compared with the late-onset group, patients with early-onset gout had higher consumption rates of sugar-sweetened beverage(28.0% vs 15.0%, P=0.001), a higher homeostasis model assessment for insulin resistance level(3.78±2.93 vs 3.10±2.39, P<0.01), and larger proportions of family histories of diabetes(30.8% vs 20.4%, P<0.01)and hypertension(51.2% vs 42.6%, P=0.003). Logistic regression analysis showed that factors associated with early-onset gout were drinking sugar-sweetened beverage( P=0.012), family history of diabetes( P=0.037). Conclusion:Early-onset gout was associated with a family history of diabetes. Patients with family histories of diabetes are more likely to have early-onset gout, which may be associated with a common genetic basis.

Objective:To investigate the clinical features, treatment and prognosis of anti-γ-aminobutyric acid type B receptor (GABA B R) encephalitis. Methods:Retrospective analysis of five patients of anti-GABA BR encephalitis from the Department of Neurology, the University of Hong Kong-Shenzhen Hospital from September 2017 to June 2019 was carried out. Clinical manifestations, auxiliary examination, and treatment were analyzed. The patients were followed up for 3.5-23.0 months to assess their prognosis. Results:Five cases of anti-GABA BR encephalitis (19-81 years old) presented acute onset, with refractory epilepsy as the main clinical manifestation. There were hyperintensive signals on T 2/fluid attenuated inversion recovery in four patients′ temporal lobe and hippocampus. Electroencephalogram showed slow wave or epileptic discharge; Lung mass was found in four patients, and all were small cell lung cancer. Five cases had poor response to first-line immunotherapy (intravenous use of pulse methylprednisolone, high dose immunoglobulin or plasma exchange), then three patients received second-line immunotherapy (rituximab, cyclophosphamide), two of whom with tumor also received tumor chemotherapy. Patients who received second-line treatment and tumor chemotherapy showed better outcome than those who only received first-line treatment. Conclusions:Anti-GABA BR encephalitis present with limbic encephalitis syndromes characterized by refractory epilepsy. For patients with poor response to first-line immunotherapy, initiating second-line immunotherapy as soon as possible can improve the prognosis significantly.

Objective: To evaluate the role of necroptosis in hyperoxia-induced acute lung injury (ALI) in preadolescent rats. Methods: A total of 72 clean-grade healthy male Sprague-Dawley rats, aged 14 days, weighing 40-50 g, were divided into 3 groups (n=24 each) by using a random number table method: control group (group C), hyperoxia-induced ALI group (group ALI) and hyperoxia-induced ALI and necrostatin-1 group (group ALI+ N). The rats of group ALI+ N was intraperitoneally injected with necrostatin-1 1.0 mg/kg once a day for 3 consecutive days.The rats were intraperitoneally injected with dimethyl sulfoxide 0.2 ml/kg once a day for 3 consecutive days in C and ALI groups.The animals were sacrificed at 72 h after inhaling oxygen, and bronchoalveolar lavage fluid (BALF) was collected for determination of interleukin-6 (IL-6) and IL-8 concentrations (by enzyme-linked immunosorbent assay), superoxide dismutase (SOD) activity (by xanthine oxidase method), and malondialdehyde (MDA) concentration (by thiobarbituric acid method). Lung tissues were taken for measurement of wet/dry weight ratio (W/D ratio) and for examination of the pathological changes (with a light microscope) and ultrastructure of lung tissues (with an electron microscope). The injured alveolus rate (IAR) was calculated.The expression of receptor-interacting protein kinase 1 (RIPK1), RIPK3 and mixed-lineage kinase domain-like protein (MLKL) in lung tissues was detected by Western blot. Results: Compared with group C, the concentrations of IL-6, IL-8 and MDA in BALF were significantly increased, the activity of SOD in BALF was decreased, the W/D ratio and IAR of lung tissues were increased, the expression of RIPK1, RIPK3 and MLKL in lung tissues was up-regulated (P<0.05), and the pathological damage was accentuated in group ALI.Compared with group ALI, the concentrations of IL-6, IL-8 and MDA in BALF were significantly deceased, the activity of SOD in BALF was increased, the W/D ratio and IAR of lung tissues were decreased, the expression of RIPK1, RIPK3 and MLKL in lung tissues was down-regulated (P<0.05), and the pathological damage was significantly attenuated in group ALI+ N. Conclusion Necroptosis is involved in the pathophysiological process of hyperoxia-induced ALI in preadolescent rats.

Objective:To investigate the relationship between the mechanism of ulinastatin reducing perioperative myocardial injury and ferroptosis in peripheral blood mononuclear cells (PBMCs) in pediatric patients undergoing heart surgery under cardiopulmonary bypass (CPB).Methods:A total of 60 pediatric patients of either sex, aged 4-8 yr, of American Association of Anesthesiologists physical status Ⅱ or Ⅲ, undergoing elective repair of ventricular septal defect under CPB, were divided into 2 groups by a random number table method: control group (C group) and ulinastatin group (UTI group), with 30 cases in each group.Combined intravenous-inhalational anesthesia was used.In UTI group, ulinastatin 20 000 U/kg was diluted to 100 ml in normal saline, 50 ml was infused through the central vein over 15 min starting from 20 min before skin incision, and the remaining 50 ml was instilled through the CPB pipeline over 15 min starting from 10 min of CPB.The equal volume of normal saline was given instead in C group.Blood samples from the internal jugular vein were collected after anesthesia induction and before skin incision (T 1), at 30 min after start of CPB (T 2), immediately after termination of CPB (T 3) and at 24 h after termination of CPB (T 4) for determination of the levels of amino-terminal B-type pro-brain natriuretic peptide (NT-proBNP), cardiac troponin I (cTnI) and creatine kinase isoenzymes (CK-MB) in plasma by enzyme-linked immunosorbent assay.PBMCs were extracted by modified Ficoll density gradient centrifugation method for determination of the concentrations of Fe 2+ and malondialdehyde (MDA) and activity of superoxide dismutase (SOD) in PBMCs (by colorimetric method) and expression of long-chain acyl-CoA synthase 4 (ACSL4) and glutathione peroxidase 4 (GPX4) in PBMCs (by Western blot). Results:Compared with the baseline at T 1, the levels of NT-proBNP, cTnI and CK-MB in plasma were significantly increased, the concentrations of Fe 2+ and MDA in PBMCs were increased, the expression of ACSL4 in PBMCs was up-regulated, and the activity of SOD was decreased, and the expression of GPX4 was down-regulated at T 2-4 in two groups ( P<0.05). Compared with C group, the plasma levels of NT-proBNP, cTnI and CK-MB were significantly decreased, the concentrations of Fe 2+ and MDA in PBMCs were decreased, the expression of ACSL4 in PBMCs was down-regulated, the activity of SOD was increased, and the expression of GPX4 was up-regulated at T 2-4 in UTI group ( P<0.05). Conclusion:The mechanism by which ulinastatin reduces perioperative myocardial injury may be related to inhibition of ferroptosis in PBMCs in the pediatric patients undergoing open heart surgery under CPB.

Objective To evaluate the role of necroptosis in hyperoxia-induced acute lung injury(ALI)in preadolescent rats.Methods A total of 72 clean-grade healthy male Sprague-Dawley rats,aged 14 days,weighing 40-50 g,were divided into 3 groups(n＝24 each)by using a random number table method: control group(group C),hyperoxia-induced ALI group(group ALI)and hyperoxia-induced ALI and necrostatin-1 group(group ALI+N).The rats of group ALI+N was intraperitoneally injected with ne-crostatin-1 1.0 mg/kg once a day for 3 consecutive days.The rats were intraperitoneally injected with dime-thyl sulfoxide 0.2 ml/kg once a day for 3 consecutive days in C and ALI groups.The animals were sacrificed at 72 h after inhaling oxygen,and bronchoalveolar lavage fluid(BALF)was collected for determination of interleukin-6(IL-6)and IL-8 concentrations(by enzyme-linked immunosorbent assay),superoxide dis-mutase(SOD)activity(by xanthine oxidase method),and malondialdehyde(MDA)concentration(by thiobarbituric acid method).Lung tissues were taken for measurement of wet/dry weight ratio(W/D ratio)and for examination of the pathological changes(with a light microscope)and ultrastructure of lung tissues(with an electron microscope).The injured alveolus rate(IAR)was calculated.The expression of recep-tor-interacting protein kinase 1(RIPK1),RIPK3 and mixed-lineage kinase domain-like protein(MLKL)in lung tissues was detected by Western blot.Results Compared with group C,the concentrations of IL-6,IL-8 and MDA in BALF were significantly increased,the activity of SOD in BALF was decreased,the W/D ratio and IAR of lung tissues were increased,the expression of RIPK1,RIPK3 and MLKL in lung tis-sues was up-regulated(P＜0.05),and the pathological damage was accentuated in group ALI.Compared with group ALI,the concentrations of IL-6,IL-8 and MDA in BALF were significantly deceased,the ac-tivity of SOD in BALF was increased,the W/D ratio and IAR of lung tissues were decreased,the expres-sion of RIPK1,RIPK3 and MLKL in lung tissues was down-regulated(P＜0.05),and the pathological damage was significantly attenuated in group ALI+N.Conclusion Necroptosis is involved in the patho-physiological process of hyperoxia-induced ALI in preadolescent rats.