Objective To observe the effect of ionizing radiation on the expressions of TLR4 and adaptor protein MyD88 in mouse peritoneal macrophages in the Toll-mediated signal transduction pathways.Methods 160 male Kunming white mice were randomly divided into 16 groups(ten each group):sham-irradiation and five groups after 4,8,16,24 and 48 h X-ray irradiation for time-course experiments;sham-irradiation and nine groups after 0.05,0.075,0.100,0.200,0.500,1.000,2.000,4.000,6.000 Gy irradiation for dose-effect experiments.Flow cytometry was used to detect the expressions of TLR4 and MyD88 after whole body irradiation (WBI) with X-rays.Results Both of TLR4 and Myd88 expressed more than shamirradiation after 0.075 and 2.000 Gy WBI for 4 h,and the expressions of them reached the peak at 16 h or 4 h after WBI(P

Objective To explore the classical clinical features of mitochondrial encephalomyopathy with lactic acidosis and stroke like episodes (MELAS) syndrome.Methods The clinical data of 1 MELAS syndrome patient was analyzed retrospectively.Results This patient suffered from the symptoms of stroke such as speech disorder and abnormal behavior at the beginning.She had a medical history of maternal family.There were headache and seizure in the process of the disease.The result after a physical examination showed that the patient had hearing loss, visual field defect and decrease of muscle strength.The CT and MRI scan of head showed that the patient had a stroke like lesion which did not follow the distribution of blood vessels.The blood and cerebrospinal fluid examination has ruled out viral and autoimmune encephalitis.The final diagnosis of MELAS syndrome was confirmed by gene analysis.The gene mutation was the m.3243A>G mutation.The clinical symptoms of the patient were comprehensive and the imaging findings were typical.Conclusions Main clinical manifestations of MELAS syndrome are stroke like seizures, epilepsy, headache, dementia, hearing impairment, peripheral neuropathy, myopathy, lactic acidosis, diabetes and so on.Main imaging features of the disease are stroke like lesions, basal ganglia calcification and brain atrophy.

Adrenomedullin is a vasodilative peptide found in 1993. It has been proved that proadrenomedullin can be divided into 4 peptides by endoenzyme. Proadrenomedullin N terminal 20 peptide (PAMP) is one of them. PAMP has many functions on cardiovascular physiology. But so far the relationship between PAMP and cardiovascular diseases has not been found. In this study its plasma levels in the patients with essential hypertension(EH) and heart failure(HF) were investigated with its pathophysiological effect discussed. The plasma levels of PAMP, endothilin(ET), Angiotension II(AT II) were measured with RIA, and norepinephrine(NE), epinephrine(E) were measured with HPLC. the plasma level of PAMP in the control group was 18 42?2 33ng/L, and was 1 62 times higher in EH group than in the control group, and was 1 53 times higher in HF group as compared with the control group respectively ( P

Objectives:To examine the effect of chloride blocker (NPPB and tamoxifen)on volume sensitive chloride channels in mouse cardiac ventricular myocytes. Methods:Isolated mouse cardiac ventricular myocytes were subjected to whole cell patch clamp to record the hypotonicity activated chloride currents. Results:When the myocytes were exposed to hypotonic solution, an obvious whole cell currents were activated. The currents were inhibited by extracellular NPPB reversibly and significantly. The specific blocker for volume sensitive chloride channel , tamoxifen (50 ?mol/L), could apparently block the activity of this channel in a voltage dependent manner. Conclusions:Mouse cardiac ventricular myocytes process volume sensitive chloride channel which is sensitive to NPPB and tamoxifen.

Objective To explore the effects of strength training on aging muscular atrophy and inflammatory factors levels in old men.Methods 11 old men participated in 12 weeks of strength training. Muscle strength/muscle thickness and serum levels of tumor necrosis factor (TNF)-α, interleukin (IL)-6, high sensitivity C-reactive protein (hsCRP) and adiponectin were measured before and after training. Results After training, the muscle thickness increased, but there was no significantly difference (P>0.05); the levels of hsCRP decreased (P<0.001) and adiponectin increased (P<0.05). Conclusion Strength training may assist in maintaining or improving muscle strength/muscle mass and reducing inflammatory factors levels.

Objective To investigate the production of carbapenemase and 16S rRNA methylase in five isolates of pan-drugs resistant E.cloacae recovered in Ruijin hospital.Methods MICs of the five isolates to 10 antibiotics were determined by E test.Six kinds of 16S rRNA methylase genes and a series of β- lactamase genes were amplified by PCR.Shotgun cloning was performed to detect carbapenem resistance determinant.The conjugal transfer of carbapenemase gene and 16S rRNA methylase gene was performed in broth culture with E.coli J53 as the recipient.Pulsed-field gel electrophoresis (PFGE) was carried out to analyse the genotyping.IEF was performed to detect β-1actamases.Southern blot was performed to determine the location of carbapenem resistance determinant.Results The MICs of 10 antibiotics were ＞32 mg/L.Four β-1actamases with pIs of 5.4 ( TEM-1 ),6.7 ( KPC-2 ),8.2 ( SHV-12 ),8.4 (CTX-M-14) were determined.The insertion sequence in the recombinant plasmid was blaKPC-2 flanked by a transposon.blaKPC-2 was located on a large non-conjugative plasmid whereas armA was located on an other conjugative plasmid.PFGE patterns of 5 isolates were identical.Conclusion KPC-2 was responsible for carbapenem resistance in pandrugs resistant Enterobacter cloacae.There was no relationship between blaKPC-2 and armA.Although pandrug resistant Enterobacteriaceae remain rare,the emergence of this group of organism merits monitoring.

Objective To compare the antitumor effect of self-developed albumin bound paclitaxel for injection ( PAB) and commercial albumin-bound paclitaxel for injection ( Abraxane ) . Methods The antineoplastic effects of PAB and Abraxane were evaluated in H22, Lewis and RM-1 allograft tumor mouse models after repeated intravenous injection (13. 4, 20. 0, 30. 0 and 45. 0 mg·kg-1 PAB and 20. 0 and/or 30. 0 mg·kg-1 Abraxane, respectively). Results PAB significantly inhibited H22 tumor growth at from the doses of 13. 4, 20. 0, 30. 0, and 45. 0 mg·kg-1,and the antitumor effect of PAB at 20. 0 mg·kg-1 was not significantly different from Abraxane at 20. 0 mg·kg-1 . PAB dose-dependently inhibited Lewis and RM-1 tumor growth at the doses of 20. 0, 30. 0, and 45. 0 mg·kg-1 . The no observed adverse effect level of PAB and Abraxane was 20. 0 mg· kg-1 in Lewis and RM-1 bearing C57 female mice. The antitumor effect and toxicity was not significantly different between PAB and Abraxane at equivalent doses. Conclusion At the same dose level, the antitumor activity and toxicity of PAB was equivalent to those of Abraxane.

Objective:To examine the roles of follicular helper T(Tfh)cells,serum IL-21 and B cells in the pathogenesis of alcohol abuse non-traumatic osteonecrosis of the femoral head ( NONFH ) .Flow cytometry was used to measure the frequencies of peripheral blood inducible Tfh cells and B cells in alcohol abuse NONFH patients and healthy controls.The disease progression and the extent of femoral head collapse,the serum IL-21 were quantified.Methods: A significantly higher percentages of CD19+B cells(t=3.765,P=0.0005),CD86+CD19+B cells(t=5.506,P<0.0001),and CD95+CD19+B cells(t=4.152,P=0.0002) in patients than those in controls was found.The percentages of CD86+CD19+B cells were positively associated with the index of femoral head collapse in alcohol abuse NONFH(P<0.0001,r=0.536).Results: The frequencies of Tfh cells (t=7.611,P<0.0001),and IL-21+Tfh cells (t=5.281,P<0.0001) were higher than those in controls;The frequencies of Tfh cells were positively associated with the percentages of CD19+B cells(P=0.0002,r=0.455),IL-21+Tfh cells were positively associated with the percentages of CD86+CD19+B cells(P=0.0002,r=0.447).Conclusion: Tfh cells and B cells may participate in the pathogenesis of alcohol abuse NONFH,and increased CD86+CD19+B cells may be associated with the extent of femoral head collapse,the interaction of Tfh cells and B cells may have an im-portant role in pathogenesis of alcohol abuse NONFH.

BACKGROUND:Thoracolumbar spine as highly concentrated stress, often prone to vertebral fractures. With the further development of the biomechanics and anatomical structure of the spine, posterior open reduction and internal fixation with pedicle screw has been widely accepted by clinicians. OBJECTIVE:To explore the clinical results and safety of percutaneous pedicle screw fixation system (Viper system) used in thoracolumbar compression fractures. METHODS:We retrospectively analyzed 40 patients with thoracolumbar compression fractures from Department of Orthopedics, Changzhou Traditional Chinese Medicine Hospital and Nanjing General Hospital of Nanjing Military Area Command of Chinese PLA from January 2013 to February 2014. According to the type of graft, patients were randomly divided into experiment group and control group, with 20 patients in each group. They were respectively subjected to Viper percutaneous pedicle screw fixation system and open reduction and pedicle screw fixation. RESULTS AND CONCLUSION:Al vertebra got bone unions. Operative time and time to bone union were shorter in the experiment group than in the control group. Moreover, intraoperative blood loss was less in the experiment group than in the control group. Cobb’s angle, height percentage of leading edge and wedge angle were similar between the two groups. However, at 12 months after internal fixation, height percentage of leading edge was lower in the experiment group than in the control group. Visual Analogue Scale scores and Oswestry Disability Index were noticeably improved after fixation in both groups. Visual Analogue Scale scores and Oswestry Disability Index were lower in the experiment group than in the control group immediately after fixation. These results suggest that compared with open reduction and pedicle screw fixation, Viper percutaneous pedicle screw fixation system for thoracolumbar compression fractures can stably restore the structure and function of spine, and does not increase perioperative complications.

Objective Non-traumatic and posteromedial subchondral osteonecrosis of trochlea tali (NTPSOTT) is a special type of necrosis of the talus , for which early diagnosis and treatment are particularly important .This study investigated the clinical ef-fectiveness of autogeneic cancellous bone transplantation in the treatment of NTPSOTT . Methods We retrospectively analyzed 21 cases of NTPSOTT treated by autogeneic cancellous bone transplantation and evaluated using the Clinical Rating System of the American Orthopedic Foot and Ankle Society ( AOFAS) , Visual Analogue Scale ( VAS) , and X-ray and CT examinations . Results The pa-tients were followed up for 12-26 months and all healed desirably , with the graft well integrated into the surrounding tissue , but no as-similation, collapse of the articular surface , or narrowing of the joint space .The last follow-up visit revealed significantly improved AOFAS score (90.55 ±6.73 vs 50.87 ±11.42, P=0.009) and VAS score (1.32 ±0.81 vs 6.43 ±1.66, P=0.027) as compared with the baseline . Conclusion Autogeneic cancellous bone transplantation is preferable for the treatment of NTPSOTT , which can effectively reduce the pain in the ankle , maintain the joint space , and protect the function of the ankle .