Growing evidence indicates that hyperhomocysteinemia is not only a high risk factor for cerebrovascular diseases,but also closely correlated with neurodegenerative diseases and mental diseases,such as Alzheimer's disease,Parkinson's disease,dementia,cognitive impair- ment,depression and schizophrenia,The mechanisms of homocysteine neurotoxicity remains unclear,and it may include activating extracellular signal-regulated kinases,excessively activating glutamate receptors,participating in oxidative stress response,affecting methylation process and damaging DNA.

Acute Disease ; Adolescent ; Adult ; Aged ; Female ; Humans ; Male ; Middle Aged ; Toluene ; poisoning ; Xylenes ; poisoning ; Young Adult

Animals ; Apoptosis ; Caspase 3 ; metabolism ; Caspase 8 ; metabolism ; Cells, Cultured ; HSP70 Heat-Shock Proteins ; metabolism ; Heat Stress Disorders ; metabolism ; Myocytes, Cardiac ; metabolism ; Rats ; Rats, Wistar

BAcKGROUND:In recent years,the pedicle screws fixation technique,which is used in fixation for atlantoaxial instability associated with trauma,severe degeneration and tumorectomy,has been developed.However,this kind of technique easily causes several complications,including malpositional screws,vascular injuries,and even vertebral artery injury.Based on the biomechanical characteristics of memory alloy and determination of atlantoaxial data,a neotype shape memory alloy cervical hook was designed to treat atlantoaxial instability.OBJECTIVE:To investigate the biomechanieal characteristics of the neotype shape memory alloy cervical hook for atlantoaxial instability.DESIGN,TIME AND SETTING:Repeated measurement analysis of variance test was performed in the Laboratory of Clinical Anatomy and Medical Biomechanics,Southern Medical University between March and April 2008.MATERIALS:Eight fresh adult craniocervical specimens(C0-C4)were provided by Department of Clinical Anatomy,Southern Medical University.Atlantoaxial neotype shape memory alloy cervical hook(50.8%-51.8%nickel and the remaining part was titanium)was fabricated by Shanghai Xinchang Memory Alloy Co.,Ltd.METHODS:The included eight C0-C4 specimens were used to test three-dimension ranges of motion(ROM)by fixation and neotype shape memory alloy cervical hook fixation.Then,the positions of spine varying from no loading to the maximum loading status were scanned and analyzed using image processing software to determine the three-dimensional ROM under different statuses.MAIN OUTCOME MEASURES:Three-dimensional ROM of tested specimens.RESULTS:Neotype shape memory alloy cervical hook fixation and Germany AESCULAP SSE hanger fixation had similar flexion-extension range of motion(P=0.595).Lateral bending three-dimensional ROM was greater in the neotype shape memory alloy cervical hook fixation group than in the Germany AESCULAP AAE hanger fixation(P< 0.05).The rotatory three-dimensional ROM was smaller in the neotype shape memory alloy cervical hook fixation group than in the Germany AESCULAP AAE hanger fixation(P<0.05).CONCLUSION:Neotype shape memory alloy cervical hook fixation had comparative post-surgery immediate stability with the Germany AESCULAP AAE hanger fixation.Neotype shape memory alloy cervical hook fixation produced a little worse biomechanical lateral bending stability and a little better biomechanical rotatory stability than Germany AESCULAP AAE hanger fixation.

Acute Disease ; Atropine ; therapeutic use ; Cholinergic Antagonists ; therapeutic use ; Humans ; Organophosphate Poisoning ; Scopolamine Hydrobromide ; therapeutic use

Air ; analysis ; Air Pollutants, Occupational ; analysis ; Ethane ; analogs & derivatives ; analysis ; Nitroparaffins ; analysis ; Uncertainty ; Workplace

Animals ; Chromatography, High Pressure Liquid ; methods ; Methoxychlor ; blood ; metabolism ; Phenols ; blood ; Rabbits

Objective To study the physiological properties of a potassium channel in the basolateral membrane (BLM) of proximal tubule. Methods Nephrons were dissected from rat kidney under a stereoscopic microscope. The standard configuration for single channel tight seal patch clamp technique was used to record channel currents from the BLM. Results A kind of potassium channel with low conductance and inward rectification was easily recorded in the BLM of the proximal tubule. The channel current occurred spontaneously in 81% seals made on the BLM. In the patches, with no spontaneous channel activity, the channel current occurred when the pressure increased. In the inside out configuration, run down was present in channel activity. The open dwelling time constants of the potassium channel were 0.524 ms and 5.087 ms, while the closed dwelling time constants were 1.029 ms and 16.500 ms. Conclusion A type of potassium channels with low conductance, stretch sensibility and chemistry sensibility, presenting kinetic properties as two opening and two closing states, are widely distributed in the basolateral membrane of proximal tubule.

Objective To investigate the reasonable proposal of prophylactic antibiotics use in plastic surgery with type Ⅰ incision.Methods The data of 748 patients with plastic surgery in our hospital were collected and the operation number was 770.Using a retrospective case-control study,we analysed the clinical effect of different administration methods.Results Clinical effects were compared among the multiple days medication group,normative administration group and no medication groups,and there was no significant difference in the prevention of postoperative infection results.Conclusions Plastic surgery with type Ⅰ incision does not need the prophylactic application of antibiotics.In special circumstances we should take medicine in strict accordance with the Guiding Principles for Clinical Application of Antibiotics.

0.05) between the radiotherapy and control groups,and the coverage of vascular endothelial cell was incomplete in each group;8 weeks after surgery,the intimal thickness of radiotherapy group was statistically thinner than that of control group(P