Objective To compare the strength of oxidative stress from different concentrations of oxygen administered by the accumulation of hydroxyl radicals during early reperfusion after global brain ischemia.Methods Sixteen adult male Mongolian gerbils with microdialysis probes implanted in the hippocampal CA1 were divided randomly (random number)into two groups (n =8 in each).All gerbils of both groups were subjected to 10 min bilateral carotid artery occlusion (BCAO).Then the following intervention:(a) immediate 30% O2 (near normoxia,NO group ) and (b ) immediate 100% O2 (hyperoxia,HO group).The accumulation of hydroxyl radicals (·OH)in hippocampus during reperfusion was estimated by measuring 2,3-dihydroxybenzoic acid (DHBA ) and 2,5-DHBA in microdialysis perfusate.Results Immediately after the onset of reperfusion,two groups showed markedly elevated DHBA,which returned to baseline gradually.Compared with the NO group,the HO group showed significantly higher peak DHBA and slower recovery.Conclusions Hydroxyl radical accumulation was more sensitive to inhalation of high concentration O2 during early reperfusion of global cerebral ischemia.

Humans ; Salivary Glands

Immobilization is a usual method to treat the injury of skeletal muscle system and plays an important role in rehabilitation of diseases. But immobilization also displays some negative effects, of all, muscle system is affected significantly. The mechanism is explored in the article from immobilization-induced skeletal muscle atrophy, the dropping of muscle power, reduction of vessels density in muscle and metabolic disturbance of muscle. The authors of the article advances that shortening the period of immobilization as possible and performing early rehabilitation are important to remove the negative influence of immobilization, but all treatments should obey the medical rules.

urine.Conclusion The metabolism of MAP in animals tissues and body fluids is related to the time elapsed after guinea pigs death.

While the field of ATP synthase research has a long history filled with landmark discoveries, recent structural works provide us with important insights into the mechanisms that links the proton movement with the rotation of the Fo motor. Here, we propose a mechanism of unidirectional rotation of the Fo complex, which is in agreement with these new structural insights as well as our more general ΔΨ-driving hypothesis of membrane proteins: A proton path in the rotor-stator interface is formed dynamically in concert with the rotation of the Fo rotor. The trajectory of the proton viewed in the reference system of the rotor (R-path) must lag behind that of the stator (S-path). The proton moves from a higher energy site to a lower site following both trajectories simultaneously. The two trajectories meet each other at the transient proton-binding site, resulting in a relative rotation between the rotor and stator. The kinetic energy of protons gained from ΔΨ is transferred to the c-ring as the protons are captured sequentially by the binding sites along the proton path, thus driving the unidirectional rotation of the c-ring. Our ΔΨ-driving hypothesis on Fo motor is an attempt to unveil the robust mechanism of energy conversion in the highly conserved, ubiquitously expressed rotary ATP synthases.
Membrane Potentials ; physiology ; Membrane Proteins ; chemistry ; metabolism ; Mitochondrial Proton-Translocating ATPases ; chemistry ; metabolism ; Protein Conformation

Objective To investigate the feasibility of laparoscopic repair for ingunal hernia after peritoneal dialysis. Methods Laparoscopic repair of inguinal hernia was conducted in 26 patients with chronic renal insufficiency who had received peritoneal dialysis for a long time. For indirect inguinal hernia, a piece of mesh was placed in the abdominal cavity and the internal ring was sutured and ligated under laparoscope. For direct inguinal hernia, the hernia sac was high suspended and then the mesh onlay was placed under laparoscope. Results The laparoscopy was successfully performed in all the 26 patients, without conversions to open surgery. No postoperative hematoma of scrotum or refractory neuralgia was observed. Follow-up examinations for 6~12 months (mean, 9 months) showed no recurrence. Conclusions Laparoscopic herniorrhaphy for inguinal hernia after peritoneal dialysis is feasible, effective, and safe.

Objective To stuey effects of coloprotectomy under colonoscopy combined with laparoscope on exfoliated tumor cells in abdominal cavity.Methods 42 cases of colorectal cancer proved by pathologic histology were devided into two groups randomly: Laparoscope Group(laparoscopic surgery) and Combined Group(colonoscopy combined with laparoscope surgery).Operation time,the positive rate of exfoliated tumor cells in abdominal cavity after and before operation,the positive rate of residual tumor cells in resection of operation specimen and postoperative complications between 2 groups were compared.Results Operation time of the Combined Group was shorter than that of the Laparoscope Group [(160.5?12.6) min vs.(201.2?18.4) min,t=-8.363,P=0.000].The positive rate of exfoliated cells in abdominal cavity before operation had no significant difference between the 2 groups[9.5%(2/21) vs.19.0%(4/21),?2=0.194,P=0.659],but the postoperative positive rate of exfoliated cells in the Combined Group was significantly lower than that in the Laparoscope Group[14.3%(3/21) vs.42.9%(9/21),?2=4.200,P=0.040].There were no residual tumor cells in resection of operation specimen of 2 groups.No infection of incisional wound and lung occurred.A follow-up for 6-24 months in the Laparoscope Group showed abdominal metastasis in 1 case.Conclusions Coloprotectomy for colorectal cancer under colonoscopy combined with laparoscope can decrease exfoliated tumor cells in abdominal cavity and shorten operation time.

OBJECTIVE: To establish miniSTR fluorescent detection system with all detected fragments below 150 bp and to enhance the efficiency of detecting the degraded DNA samples. METHODS: All candidate primers were designed by Primer Premier 5 and screened by FastPCR 6.0. The miniSTR multiplex system was established by these selected loci labeling by four fluorescent dye. The parameters of PCR and primer concentrations were subsequently optimized. The electrophoresis was fulfilled under POP4 on 3100-Avant and the typing data was validated by standard DNA 9947A and 007. Fresh blood samples and difficult degraded DNA samples were tested to evaluate the usefulness of the system. RESULTS: All amplicons in the established miniSTR fluorescent detection system (D12ATA63, D2S1776, D1GATA113, D4S2408, D17S974, D20S482, D3S3053, Amelogenin, D6S474, D9S1122) were less than 150bp. The profile showed a balanced peak height without extra stutter by optimal protocol. Allele frequencies showed no deviations from Hardy-Weinberg equilibrium. The system showed accumulated probability of discrimination 0.999 999 983 and accumulated triplet excluding probability of paternity 0.996 8. It could detect corrupt muscle tissue, low copy number DNA samples and human tissues fixed by 40% formaldehyde solution for 12 days. CONCLUSION The miniSTR fluorescent detection system could be solely used for personal identification of degraded DNA samples or complementally used for paternity tests. And the system could enhance the ability of detecting the trace and degraded DNA.
DNA/chemistry* ; DNA Fingerprinting ; DNA Primers/genetics* ; Electrophoresis, Agar Gel ; Forensic Genetics ; Gene Frequency/genetics* ; Genetic Markers/genetics* ; Genetics, Population ; Humans ; Polymerase Chain Reaction/methods* ; Reference Standards ; Sequence Analysis, DNA/methods*

ObjectiveTo observe the effect of early rehabilitation and insulin treatment on acute cerebral infarction. Methods160 cases with acute cerebral infarction (without diabetes and the serum glucose were all above 6.7 mmol/L) were divided into treatment group and control group. Each case of both groups was treated with routine treatment, and those in the treatment group were treated with insulin instantly and early rehabilitation in the first day after onset when physical signs were stable and conditions didn't deteriorate. They were assessed with Neurological Impairment, Fugl-Meyer Assessment and Barthel Index 4 weeks after treatment. ResultsCompared with the control group, the neurological function improved obviously in the treated group (P＜0.05). ConclusionEarly rehabilitation and insulin treatment can improve neurological function and the activity of daily living.

Objectives:To study the impact of nutritional support in non operative management of severe acute pancreatitis. Methods:Sixteen patients with severe acute pancreatitis were provided with stage nutritional support. Results:Fourteen cases fully recovered and 2 cases died. Stage of maintenance equilibration was (57.0?12.5)hours,TPN was (12.1?4.2)days and PN+EN was (12.2?3.5)days. Conclusions:Stage nutritional support might be favourable in improving prognosis and survival rate of severe acute pancreatitis.