BACKGROUND:Cord tissues,which immune system is relatively non-development with low expression of MHC,rely on the protection of the mother's immune system.Accordingly,studies underlying biological characteristics of umbilical cord mesenchymal stem cells (MSCs) arouse more and more attention.OBJECTIVE:To isolate,separate,and culture MSCs from the tissues of umbilical cord,and to explore the ability of multi-directional differentiation.DESIGN,TIME AND SETTING:The in vitro cytology experiment was performed at the Laboratory of Tissue Engineering of Sichuan University from October 2006 to May 2007.MATERIALS:The umbilical cord of healthy neonate with 37-40 weeks gestational age was obtained from delivery room of the Second West China Hospital,Sichuan University.METHODS:Pieces of umbilical cord were dissected along its long axis,vessel was pulled away,then cord was tied together with a suture creating "loops",then it was placed into collagenase solution,after 6-8 hours,suspended cells obtained from the loops suspension were centrifuged and cultured with adherent method,pass,aged when single cell-derived colonies were appeared.Finally,the 5th generation of cells was induced differentiation towards osteoblasts and lipoblasts.MAIN OUTCOME MEASURES:Morphology,growth,surface antigen expression,as well as the multiple differentiation potential of umbilical cord MSCs.RESULTS:The adherent cells obtained from umbilical cord after removal vessels showed short rod-like or fusiform shape,which can be proliferated and form single cell-derived colonies.Cells isolated from the umbilical cord high expressed integrin markers (CD29,CD51,CD71) but not hematopoietic lineage markers (CD34,CD45 and HLA-DR).These colonies can differentiate into osteoblasts that produce mineralized matrices,stained by alizarin red and alkaline phosphatase,and differentiate adipocytes that accumulate lipid vacuoles and are demonstrated by morphology,stained by oil red.CONCLUSION:Umbilical cord tissue contains a high number of MSC-like elements forming colonies that may be successfully expanded in culture.The proliferation colonies present matrix ceil immunophenotypes,and can differentiate into osteobiasts and adipocytes.

The clinical data of 3 cases of Ramsay-Hunt syndrome concurrent with ipsilateral vocal cord paralysis were retrospectively analyzed, and the relevant literatures were also reviewed. Ramsay-Hunt syndrome is a kind of disease characterized by heavy ear pain, herpes zoster oticus and inner ear neurologic symptoms, which can also affect the vocal cords and give rise to vocal cords paralysis. Ramsay-Hunt syndrome can cause multiple in flammation of cranial nerves. The viral infection can also involve the 3rd and 10th cranial nerves. It mainly damage the facial nerve, followed by the involvement of vestibulocochlear nerve. The vagus nerve damage is rare, so the relevant clinical reports are less. It is important to take the objective data as well as subjective symptoms of the patients into consideration to make a definite diagnosis, so that we can treat it as soon as possible to achieve better curative effect.
Adult ; Aged ; Female ; Herpes Zoster Oticus ; complications ; Humans ; Male ; Middle Aged ; Vocal Cord Paralysis ; complications

Objective To compare the biomechanical properties between the two-level fixation by im- plantation of pedicle-screws into the adjacent upper and lower vertebrae of the fractured vertebra and the three-level fixation by implantation of pedicle screws into the fractured vertebra and its adjacent upper and lower vertebrae in the treatment of thoracolumbar burst fractures.Methods Eight fresh frozen calf spines were used in this study.Each specimen was tested in four models:intact model as the control,L1 burst fracture model,two-level fixation model, and three-level fixation model.The L1 burst fracture model was created on a biaxial material testing machine (MTS858 Bionix test system,America).During the experiment,the flexion,extension,bilateral bending and axial rotation loadings were applied to the specimens and the range of motion(ROM)was measured with a three-dimensional laser analysis apparatus and the stiffness was calculated subsequently.One-way statistical analysis was used.Results The ROMs under six different loadings in the fracture model became larger obviously(P＜0.05)and the stiffness decreased(P＜0.05).The ROMs in both fixation models were smaller than those in the other models(P＜0.01)and the stiffness increased distinctly(P＜0.05).There were no significant differences in ROMs and stiffness between the two-level fixation and three-level fixation models(P＞0.05).Conclusion Two-level fixation provides similar biomechanical stability as three-level fixation does in the reconstruction of unstable thoracolumbar fractures.

Objective To study the characteristics of MRI Lesions in posterior circulation cerebral infarction and the correlation of the syndrome types of traditional Chinese medicine.Methods 82 patients with posterior circulation cerebral infarction from May 2012 to May 2015 were recruited, two observers estimated cranial MRI infarct size, location, and TCM syndrome type in the hospital medical records of the patients separately.Results Of all patients with posterior circulation cerebral infarction, patients with meridians involved infarction in the distant part of posterior circulation is far more than other parts of the posterior circulation(21 patient,P=0.006), nevertheless,patients with apoplexy involving Zang-fu organs,cerebral infarction volume is larger (14.78 ± 5.68 mlvs. 9.12 ± 6.67 ml,P=0.001).Conclusion Of all patients with posterior cerebral infarction, patients with meridians be involved, infarction in the distant part of posterior circulation is far more than other parts of the posterior circulation, nevertheless, in patients with apoplexy involving Zang-fu Organs, cerebral infarction volume is larger.

Adult ; Chromium ; adverse effects ; Electroplating ; Female ; Humans ; Male ; Middle Aged ; Nose ; drug effects ; Occupational Exposure ; adverse effects

Cerebrospinal Fluid Rhinorrhea ; surgery ; Craniotomy ; methods ; Endoscopy ; Frontal Sinus ; surgery ; Humans ; Male ; Nose ; surgery ; Reconstructive Surgical Procedures ; methods ; Young Adult

Adult ; Barotrauma ; diagnosis ; surgery ; Hand Injuries ; diagnosis ; surgery ; Humans ; Male ; Middle Aged ; Paint

Animals ; Arrhythmias, Cardiac ; chemically induced ; prevention & control ; Cats ; Endothelin-1 ; adverse effects ; Medulla Oblongata ; drug effects ; Metoprolol ; pharmacology ; gamma-Aminobutyric Acid ; pharmacology

0.05),and the expression of HoxB5 in the model group tapered after the 7th day,but the expression of HoxB5 increased and reached the peak on the 7th day and expressed in a stable level in the control group and were significantly higher than those of model group(Pa

Objective To investigate the effect of propofol post-conditioning on RNA2 (ADAR2)-α-amino-3-hydroxy-5-methyliso xazole-4-propionic acid (AMPA) receptor subunit glutamate 2 (GluR2) pathway in hippocampal neurons of fetal rats subjected to oxygen-glucose deprivation (OGD).Methods The hippocampal neurons were isolated from the fetal rats obtained from Wistar rats at 16-18 days of gestation and primarily cultured for 7 days.The primarily cultured neurons were randomly divided into 3 groups (n =6 each):control group (group C) ; OGD group (group O) ; propofol post-conditioning group (group P).The cells were subjected to OGD for 1 h followed by restoration of O2-glucose supply in group O.In group P,the cells were subjected to OGD for 1 h followed by restoration of O2-glucose supply and then 1.2 μg/ml propofol was added and the cells were cultured for 2 h and then the culture medium was replaced with plain culture medium.At 24 h of incubation,the cells were collected for assessement of the survival rates of the hippocampal neurons and for determination of the expression of ADAR2 mRNA (by RT-PCR),the total ADAR2 protein (tADAR2) and ADAR2 protein in the nucleus of cells (nADAR2) (by Western bolt).The editing percentage of GluR mRNA at the Q/R site was analyzed by nest RT-PCR and BbV1.Results There was no significant difference in the expression of ADAR2 mRNA and tADAR2 among the three groups.Compared with group C,the survival rates of the hippocampal neurons were significantly decreased,the expression of nADAR2 was down-regulated,the ratio of nADAR2/tADAR2 was decreased,and the editing percentage of GluR mRNA at the Q/R site was decreased in group O.Compared with group O,the survival rates of the hippocampal neurons were significantly increased,the expression of nADAR2 was up-regulated,the ratio of nADAR2/tADAR2 was increased,and the editing percentage of GluR mRNA at the Q/R site was increased in group P.Conclusion Propofol post-conditioning reduces OGD-induced damage to hippocampal neurons of fetal rats through activating ADAR2-AMPA receptor GluR2 pathway.