ObjectiveThe aim of this study was to investigate the variations of endogenous metabolites in the urine and plasma of 2，4，6-trinitro benzene sulfonic acid （TNBS）-induced colitis model rats on the base of untargeted and targeted metabolomics techniques. MethodsA total of 16 male SD rats were randomly and equally divided into control group and model group. The rats in the model group were treated with TNBS enema to establish experimental colitis rat model. The urinary metabolites of rats in the both two groups were detected by employing ¹H nuclear magnetic resonance （¹H NMR）. The levels of amino acids in urine and plasma of above rats were investigated by hydrophilic interaction ultra-high-performance liquid chromatography-tandem mass spectrometry （HILIC-UPLC-MS/MS）. Multivariate statistical analysis was combined to analyze the metabolic profile additionally. ResultsCompared with the control group， the ¹H NMR results showed that the metabolic profile of urine in the model rats was significantly changed， including increased levels of pyruvate， formate， methylamine and citrate， decreased levels of trimethylamine oxide and malonate （all P < 0.05）. Meanwhile， the HILIC-UPLC-MS/MS results indicated that the levels of phenylalanine and histidine were significantly increased in the urine of model rats， the contents of lysine， arginine， phenylalanine， leucine， glycine， tryptophan， proline， histidine and tyrosine were markedly elevated while glutamine， valine， alanine and isoleucine were notably reduced in the plasma of model rats （all P < 0.05）. ConclusionsThe metabolic pathways including energy metabolism， amine metabolism and amino acid metabolism were interfered in colitis rats induced by TNBS. The multivariate metabolomics methods based on ¹H NMR and HILIC-UPLC-MS/MS revealed the metabolic alterations of urine and plasma in the colitis rats， providing new perspective for the mechanism research of inflammatory bowel disease （IBD） and the exploration of related biomarkers.

OBJECTIVETo investigate the current status of the application of H-magnetic resonance spectroscopy (H-MRS) in neonates with hypoxic-ischemic encephalopathy (HIE), and to describe the trend of research in the field.

METHODSPubMed, EMBASE, and Web of Science were searched for English articles published up to January 10, 2018, with the combination of key words and MeSH terms. The articles were screened according to inclusion and exclusion criteria. Excel 2016, Bicomb 2.0, and VOSviewer1.6.6 were used to analyze the key words, to perform a cluster analysis of hot words, and to plot the knowledge map.

RESULTSA total of 66 articles were included, and 27 high-frequency key words were extracted. The results showed that H-MRS was mainly used in four directions of the clinical practice and scientific research on HIE. In clinical practice, H-MRS attracted wide attention as a clinical examination for HIE and a tool for prognostic evaluation; in scientific research, H-MRS was used in animal experiments and studies associated with mild hypothermia therapy.

CONCLUSIONSAs an auxiliary means of magnetic resonance imaging, H-MRS plays an important role in investigating the pathogenesis of neonatal HIE, improving existing therapies, and evaluating the prognosis of neonates with HIE.

Female ; Humans ; Hypoxia-Ischemia, Brain ; diagnosis ; diagnostic imaging ; Infant, Newborn ; Infant, Newborn, Diseases ; diagnosis ; diagnostic imaging ; Magnetic Resonance Imaging ; methods ; Male

OBJECTIVETo study the effect of astrocyte exosomes on hypoxic-ischemic neurons.

METHODSRat astrocytes were cultured in vitro, and differential centrifugation was used to obtain the exosomes from the cell supernatant. Transmission electron microscopy, Nanosight, and Western blot were used for the identification of exosomes. BCA method was used to measure the concentration of exosomes. Rat neurons were cultured in vitro and then divided into control group, exosome group, oxygen glucose deprivation (OGD) group, and OGD+exosome group (n=3 each). The OGD and OGD+exosome groups were cultured in glucose-free medium under the hypoxic condition. The exosome and OGD+exosome groups were treated with exosomes at a final concentration of 22 μg/mL. The control and OGD groups were given an equal volume of phosphate-buffered saline. ELISA was used to measure the level of lactate dehydrogenase (LDH) in neurons. The terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling was used to measure the apoptotic index of neurons.

RESULTSThe identification of exosomes showed that the exosomes extracted by differential centrifugation had the features of exosomes. Compared with the control and exosome groups, the OGD group had significant increases in LDH level and apoptotic index (P<0.05). Compared with the OGD group, the OGD+exosome group had significant reductions in LDH level and apoptotic index (P<0.05).

CONCLUSIONSThe exosomes from astrocytes have a protective effect on neurons with hypoxic-ischemic injury.

Animals ; Apoptosis ; Astrocytes ; physiology ; Cell Hypoxia ; Cells, Cultured ; Exosomes ; physiology ; Glucose ; deficiency ; Hydro-Lyases ; analysis ; Neuroprotection ; Rats ; Rats, Sprague-Dawley

OBJECTIVE: To reveal the current research status on stem cell transplantation in the treatment of neonates with hypoxic-ischemic encephalopathy (HIE), and to summarize the recent hotspots of the research in this field. METHODS: Using the key words of "stem cells" and "HIE", a computerized search was performed for the articles in English published before June 1, 2018 in PubMed, EMBASE, and Web of Science. Microsoft Office Excel 2013 was used for the statistical analysis of key words. Bicomb 2.0 and VOSviewer 1.6.6 were used for the cluster analysis of hot words and plotting of knowledge maps, respectively. RESULTS: A total of 106 articles were included and 43 high-frequency key words were extracted. The words of "cell transplantation" and "hypoxia-ischemia" were in the core position of the co-word map. The cluster analysis showed that the studies of stem cell transplantation in the treatment of neonatal HIE mainly focused on umbilical cord blood cell transplantation (32.6%), mesenchymal stem cells and neural stem cells (29.5%), perinatal brain injury (28.1%), and other topics (9.8%). CONCLUSIONS In the current studies of stem cell transplantation in the treatment of neonatal HIE, umbilical cord blood cell transplantation, mesenchymal stem cells, neural stem cells, and perinatal brain injury are popular research topics at different levels.
Humans ; Hypoxia-Ischemia, Brain ; Infant, Newborn ; Mesenchymal Stem Cells ; Neural Stem Cells ; Stem Cell Transplantation

Hypoxic-ischemic encephalopathy (HIE) in neonates is the brain injury caused by perinatal asphyxia or hypoxia and is a major cause of death in neonates and nervous system dysfunction in infants and young children. Although to a certain degree, mild hypothermia therapy reduces the mortality of infants with moderate to severe HIE, it cannot achieve the expected improvements in nervous system dysfunction. Hence, it is of vital importance to search for effective therapeutic methods for HIE. The search for more therapies and better preventive measures based on the pathogenesis of HIE has resulted in much research. As an important link in the course of HIE, energy failure greatly affects the development and progression of HIE. This article reviews the research advances in the treatment and prevention of energy failure in the course of HIE.
Energy Metabolism ; Humans ; Hypothermia, Induced ; Hypoxia-Ischemia, Brain ; prevention & control ; therapy ; Infant, Newborn ; Infant, Newborn, Diseases ; prevention & control

BACKGROUNDAlthough previous reports had reported the use of temporary internal distraction as an aid to correct severe scoliosis, two-stage surgery strategy (less invasive internal distraction followed by posterior correction and instrumentation) has never been reported in the treatment of patients with severe spinal deformity. This study aimed to report the results of the surgical treatment of severe scoliosis and kyphoscoliosis by two-stage and analyse the safety and efficacy of this surgical strategy in the treatment of severe spinal deformities.

METHODSA total of 15 patients with severe scoliosis, kyphoscoliosis or kyphosis who underwent two-stage surgeries (less invasive internal distraction followed by posterior correction and instrumentation) were studied based on hospital records. Pretreatment radiographs and radiographs taken after first surgery (internal distraction by two small incisions), before second surgery (posterior correction, instrumentation and fusion), one week after second surgery and final follow-up were measured. Subjects were analyzed by age, gender, major coronal curve magnitude, flexibility of major curve, major sagittal curve magnitude before first surgery, after first surgery, before second surgery, after second surgery and at final follow-up. Complications related to two-stage surgeries were noted in each case.

RESULTSThe average major curve magnitude was 129.4° (range, 95° to 175°), reduced 58.9° or 45.4% after first stage surgery and reduced 30.6° or 24.6% after second stage surgery. The loss of correction during the interval between two surgeries was 7.1%. The total major coronal curve correction was 81.4° or 62.9%. At the final follow up, the average loss of correction of major coronal curve was 3.9° and the final average correction rate was 59.7%. The average major sagittal curve magnitude was 80.3° (range, 30° to 170°), and the total major sagittal curve correction was 48.2°. Loss of correction averaged 4.0° for major sagittal curve and the final correction averaged 42.2°. Clinical complications were noted in the peri-operative and long-term periods.

CONCLUSIONSTwo-stage surgery was a safe and effective surgical strategy in this difficult population. Using two-small-incision technique, the first stage surgery was less invasive. No permanent neurologic deficit was noted in this series.

Adolescent ; Child ; Female ; Humans ; Kyphosis ; diagnostic imaging ; surgery ; Male ; Radiography ; Scoliosis ; diagnostic imaging ; surgery ; Treatment Outcome

Adolescent ; Child ; Child, Preschool ; Female ; Humans ; Infant ; Logistic Models ; Lung Diseases, Interstitial ; diagnostic imaging ; Male ; Radiography, Thoracic ; methods ; Tomography, X-Ray Computed ; methods

OBJECTIVETo investigate the pathogens of acute respiratory infection (ARI) in Guangzhou from 2006 to 2009.

METHODSA total of 1554 cases of ARI patients in Second Affiliated Hospital of Guangzhou Medical College from September 2006 to September 2009, were recruited in the survey. The sample of throat and pharyngeal swab were collected from each patient.11 types of virus including influenza A (FluA), influenza B (FluB), adenovirus (ADV), human rhinovirus (HRV), respiratory syncytial virus (RSV), parainfluenza virus type 1, type 2, type 3 (HPIV1, HPIV2, HPIV3), human metapneumovirus (MPV) and human coronavirus (HCoV) type 229E, type OC43 were detected by Fluorescence Quota PCR method. The epidemic feature and clinical characteristic of each virus were then analyzed.

RESULTSVirus were found in 1024 samples in total, accounting for 65.9% (1024/1554). RSV was the most common virus, which was found in 261 samples (16.8%); and followed by HRV as 13.9% (216/1554), FluA as 11.6% (181/1554), MPV as 6.5% (101/1554), FluB as 6.4% (99/1554), HPIV as 4.9% (76/1554), ADV as 3.5% (55/1554) and HCoV as 2.3% (35/1554). HPIV and HCoV shared a similar infection ratio among different age groups. The infection ratio of FluA and FluB was highest among 15-24 years old group, accounting for 16.5% (29/176) and 7.4% (13/176) respectively. MPV, RSV and HRV were the main pathogens caused infection among children under 4 years old, accounting for 9.7% (49/503), 21.7% (109/503) and 18.9% (95/503). The infection ratio of ADV was 6.0% (19/318), which was the most common pathogen among 5-14 years old patients. The incidence rate of HPIV and HRV showed no obvious seasonal features; while the prevalence of FluA, FluB, RSV, ADV, MPV and HCoV changed significantly in different seasons.22.2% (227/1024) ARI patients co-infected other respiratory virus.90.1% (163/181) FluA patients, 88.9% (88/99) FluB patients and 92.7% (51/55) ADV patients had high fever symptoms.

CONCLUSIONRSV was the main pathogen of ARI, and the new-found virus MPV was also another crucial pathogen. Some pathogens' incidence rate were related to the season and patient's age. Co-infections of other respiratory virus were also detected in parts of ARI patients.

Acute Disease ; Adolescent ; Adult ; Aged ; Child ; Child, Preschool ; China ; epidemiology ; Humans ; Infant ; Infant, Newborn ; Metapneumovirus ; isolation & purification ; Middle Aged ; Respiratory Syncytial Viruses ; isolation & purification ; Respiratory Tract Infections ; epidemiology ; virology ; Young Adult

OBJECTIVETo evaluate the biomechanical changes of balloon inflating and cement filling in avascular necrosis of the femoral head using finite-element analysis.

METHODSThe procedure of percutaneous balloon inflating and cement filling was simulated in fresh specimen of human femoral head. CT scan and three-dimensional reconstruction were used to establish the three-dimensional model of the femoral head. The physiological load was analyzed using three-dimensional finite element model to simulate the load and calculate stress on the hip during walking. Finite element analysis was performed on the avascular necrosis model and balloon inflating and bone cement filling model to measure the Von-Mises force at the top, neck and weight-bearing area of the femoral head. Another 8 fresh specimens of femoral head necrosis of human were obtained to stimulate balloon inflating and bone cement filling procedures, and the displacement of the femoral head under different loads was recorded before and after the procedures.

RESULTSAfter bone cement filling in the necrosis area, the load reduced significantly in the weight-bearing area of the femoral head, and the load distribution became more uniform at the femoral neck and the top of the head. The anti-deformation ability of the necrosis femoral head increased after bone cement filling. The infinite-element analysis and specimen biomedical test showed similar results.

CONCLUSIONPercutaneous balloon inflating and bone cement filling in the necrosis area can change the biomechanics mechanism of the femoral head and neck, improve the supporting capacity under load, and prevent the progression of head collapse.

Biomechanical Phenomena ; Bone Cements ; therapeutic use ; Computer Simulation ; Femur Head Necrosis ; therapy ; Finite Element Analysis ; Humans ; Imaging, Three-Dimensional ; Models, Biological ; Orthopedics ; methods ; Tomography, Spiral Computed ; Weight-Bearing ; physiology

Humans ; Osteotomy ; adverse effects ; methods ; Scoliosis ; surgery