BACKGROUND:Piperine in models of pancreatitis, gout, middle cerebral artery infarction has anti-inflammatory, antioxidant and immune regulatory effects, but its effects on periodontitis model are not clear.
OBJECTIVE:To observe the protective effect of piperine on bone absorption and degradation of col agen in experimental rat models of periodontitis.
METHODS:Rat models of periodontitis were established by ligaturing the dental cervix of rat mandibular first molar with 3-0 silk. On day 1 before model establishment, rats were intragastrical y administered piperine 50 and 100 mg/kg. There were healthy control group and model group. Related detection was performed 8 weeks after model establishment.
RESULTS AND CONCLUSION:(1) Results of quantitative CT analysis:compared with the healthy control group, the distance from the first molar enamelo-cemental junction to the alveolar ridge crest was significantly lower in the model group (P<0.05). The degree of alveolar damage was significantly improved in the 50 and 100 mg/kg piperine groups compared with the model group (P<0.05). (2) Related factor protein expression:compared with the model group, matrix metal oproteinase-8,-13 and interleukin-1βprotein expression was significantly decreased in the 100 mg/kg piperine group (P<0.05);matrix metal oproteinase-8 protein expression was significantly decreased in the 50 mg/kg piperine group (P<0.05). (3) Col agen fiber morphology:compared with the model group, col agen fibers arranged orderly and col agen fiber area significantly increased in the 50 and 100 mg/kg piperine groups (P<0.05). (4) Results confirmed that piperine could reduce the alveolar bone resorption, reduce the degradation of col agen fibers and protect the periodontal tissues in models of periodontitis. Its mechanism is associated with the inhibition of matrix metal oproteinase-8,-13 and interleukin-1βprotein expression.

AIM:To evaluate the short-term efficacy of posterior chamber phakic intraocular lens implantation for moderate to high myopia.METHODS:Fifty-three eyes of 27 patients with moderate to high myopia (-3.25 to-21.5D) were received posterior chamber phakic intraocular lens implantation with 2.8mm clear corneal incision.Changes of visual acuity, intraocular pressure(IOP), counts of endothelial cells and surgically induced astigmatism at 1mo after surgery were observed.RESULTS:The preoperative best corrected visual acuity (BCVA LogMAR) were 0.05±0.18, the postoperative BCVA at 1d were 0.02±0.14, the postoperative BCVA at 1wk were-0.05±0.11, the postoperative BCVA at 1mo were-0.07±0.10.The postoperative BCVA were statistically significant differences in different time(P<0.05).The preoperative endothelial cell count was 2932.5±270.8/mm2, the postoperative endothelial cell count at 1d was 2917.1±299.0/mm2;the postoperative endothelial cell count at 1wk was 2902.5±288.6/mm2;the postoperative endothelial cell count at 1mo was 2855.3±284.2/mm2.The postoperative endothelial cell count was not statistically significant differences in different time.The preoperative IOP was 15.8±2.5mmHg;the postoperative IOP at 1d was 15.3±2.9mmHg;the postoperative IOP at 1wk was 17.4±5.8mmHg;the postoperative IOP at 1mo were 15.8±2.6mmHg.The preoperative IOP was significantly different compared with postoperative IOP at 1d, 1wk and 1mo.The postoperative IOP at 1d and 1wk were statistically significant differences (P<0.05).The surgically induced astigmatism at 1d was 0.74±0.39D;the surgically induced astigmatism at 1wk was 0.57±0.28D;the surgically induced astigmatism at 1mo was 0.44±0.21D.The postoperative IOP were statistically significant differences in different time (P<0.05).The preoperative anterior chamber depth was 3.26±0.25mm;the postoperative central vault at 1d were 654.5±345.2μm;the postoperative central vault at 1mo were 683.0±211.7μm.The postoperative central vault were significantly different between that at 1d and 1mo after operations.Operations went without serious complications.CONCLUSION:Posterior chamber phakic intraocular lens implantation for moderate to high myopia were safe, effective and predictability.But long-term effect remains needed to be further follow-up.

In this paper, we interpret the new YY/T 0841-2011 standard and contrast the difference between it and GB9706.1-2007 standard. Then, we improved the current preventive maintenance work. After the improvement, we not only have more effective detection of the electrical safety performance of all kinds of medical electrical equipment, but also reduce the workload of clinical engineers, improve efficiency, and reduce the risk of electrical shock.
Electrical Equipment and Supplies ; standards ; Equipment Safety ; Maintenance

PEG-modified magnetic Fe3O4 (Fe3O4-PEG) nanoparticles were sythesized using a solvothermal reaction and characterized with transmission electron microscopy (TEM) and thermo gravimetric analysis (TGA). The photothermal effect and photothermal destruction of cancer cells were evaluated. Then the doxorubicin loaded Fe3O4-PEG (DOX-Fe3O4-PEG) nanoparticles were prepared. The cytotoxicity and combined chemotherapy/photothermal therapy (PTT) effect were investigated. Uniform PEG coated Fe3O4 nanoparticles with particle size of 155 nm were obtained in the experiment. The loading and release of doxorubicin on Fe3O4-PEG were pH-dependent. The drug loading capacity in water was 21%. The results of MTT indicated a good biocompatiblity of Fe3O4-PEG nanoparticles and high cytotoxicity of DOX-Fe3O4-PEG. In combined therapy experiment, photothermal therapy demonstrated unambiguously enhanced chemotherapy efficacy. In conclusion, the obtained Fe3O4-PEG nanoparticles which exhibit good photothermal effect and drug loading capacity can be used for chemotherapy and photothermal therapy. The synergetic anti-tumor activity indicates the potential for the combined application of chemotherapy and photothermal therapy in cancer treatment.
Antibiotics, Antineoplastic ; administration & dosage ; pharmacology ; Cell Survival ; drug effects ; Doxorubicin ; administration & dosage ; pharmacology ; Drug Carriers ; Ferrosoferric Oxide ; chemistry ; Humans ; Hyperthermia, Induced ; MCF-7 Cells ; Magnetite Nanoparticles ; chemistry ; Particle Size ; Polyethylene Glycols ; chemistry

BACKGROUNDAn early identification of the composition of arterial thrombus may have diagnostic, therapeutic, and prognostic implications. The variation of magnetic resonance (MR) signal intensity between white and red thrombi, especially in the susceptibility sensitive MR sequence, remains unknown. Our research was to evaluate the feasibility of MRI in differentiating of white and red thrombi with a phantom study.

METHODSA total of 12 red and 12 white thrombi were prepared with the venous blood. Examination of the phantom was completed using a 3.0T MR unit, including fluid attenuated inversion recovery (FLAIR) T1, T2-weighted imaging (T2WI), FLAIR T2, T2 gradient echo (T2 GRE) imaging, and susceptibility weighted angiography sequences (SWAN). MR signal intensity patterns of the thrombi were objectively classified as hyperintensity, isointensity and hypointensity, compared with the background agar. The volume of thrombus was calculated and correlated with its signal intensity.

RESULTSFor white thrombi, 11/12 clots showed hyperintensity and 1/12 showed isointensity in FLAIR T1 images. In T2WI, 6/12 clots showed hyperintensity, 3/12 isointensity, and 3/12 hypointensity. In FLAIR T2, 8/12 clots showed hyperintensity and 4/12 showed isointensity. In T2 GRE, 3/12 clots showed hyperintensity and the remaining 9/12 clots showed isointensity. In SWAN, 5/12 clots demonstrated hyperintensity and 7/12 isointensity. For the red thrombus, 12/12 clots demonstrated hyperintensity in FLAIR T1, T2WI, and FLAIR T2 sequences. In T2 GRE and SWAN sequences, 3/12 clots displayed hypointensity and the remaining 9/12 clots showed slight hyperintensity. Thrombi with hypointensity displayed in T2 GRE and SWAN sequences were significantly larger than those with hyperintensity.

CONCLUSIONSDifferentiation of white and red thrombi with conventional MR sequence is unreliable, because both kinds of thrombi do not possess unique signal intensity features in these sequences. Red thrombus may or may not show hypointensity in the susceptibility sensitive MR sequences, depending on its size and time course.

Humans ; Magnetic Resonance Imaging ; methods ; Phantoms, Imaging ; Thrombosis ; diagnosis ; pathology

OBJECTIVETo investigate the effect of edaravone on renal ischemia-reperfusion injury in rats.

METHODSFifty rats were randomly divided into five groups: sham operation group (Group A), renal ischemia-reperfusion group (Group B) and edaravone treated groups (Group C1, Group C2 and Group C3 with different drug dosages). Serum maleic dialdehyde (MDA) and superoxide dismutase (SOD), renal MDA and SOD, serum creatinine (Cr), blood urea nitrogen (BUN) were measured after the rat kidney was ischemia-reperfused for 24 hours. Renal ultrastructure was observed.

RESULTCompared with Group A, serum and renal MDA, serum Cr, BUN of Group B were significant increased (P <0.01), serum and renal SOD of Group B were significant decreased (P <0.01). After edaravone treatment, serum MDA, Cr and renal MDA of Group C were lower than those in Group B (P<0.01); Serum and renal SOD of group C were higher than those in Group B (P <0.01); Compared with Group B, BUN level of Group C had no significant change (P >0.05). The renal ultrastructure was greatly injured in Group B, meanwhile it was obviously ameliorated in Group C.

CONCLUSIONEdaravone has protective effects on renal ischemia-reperfusion injury in rats.

Animals ; Antipyrine ; analogs & derivatives ; therapeutic use ; Kidney ; blood supply ; Male ; Malondialdehyde ; metabolism ; Random Allocation ; Rats ; Rats, Sprague-Dawley ; Reperfusion Injury ; metabolism ; prevention & control ; Superoxide Dismutase ; metabolism

OBJECTIVETo investigate the therapeutic effects of double filtration plasmapheresis(DFPP) in treatment of hyperlipidemic acute pancreatitis.

METHODSNine patients with acute hyperlipidemic pancreatitis were treated with DFPP in addition to the conventional therapeutic measures. The clinical symptoms,serum levels of triglyceride (TG) and APACHE II scores were observed before and after DFPP.

RESULTAfter DFPP the clinical symptoms of patients were improved greatly; serum levels of TG decreased from (83.48 +/-2.54)mmol/L to (4.09 +/-0.65)mmol/L(P<0.01) and APACHE II scores decreased from 12.2 +/- 2.3 to 6.2 +/- 1.3(P <0.05). There were no significant side effects during and after DFPP.

CONCLUSIONDFPP can be effectively and safely applied in patients with acute hyperlipidemic pancreatitis.

Acute Disease ; Adult ; Female ; Filtration ; methods ; Hemofiltration ; methods ; Humans ; Hyperlipidemias ; etiology ; therapy ; Male ; Middle Aged ; Pancreatitis ; complications ; therapy ; Pancreatitis, Acute Necrotizing ; therapy ; Plasmapheresis ; instrumentation ; Young Adult

OBJECTIVETo investigate the effects of amygdala kindled seizures on memory retention of passive-avoidance test in rats.

METHODSChronic kindled seizures were achieved by daily application of electric stimulations on amygdala until the occurrence of 3 consecutive convulsive seizures. Then a passive-avoidance test was performed to measure memory retention ability in rats; another group of rats received an electric stimulation on amygdala 5 min before the training trail to observe the effects of acute seizure attack on memory retention ability.

RESULTIn the training trail and the 1st day of the test trail, there was no difference in the latency to enter dark compartment between chronic kindled seizure group and its corresponding control group. However, the latency significantly increased at the 5 th day of test trail. In addition, the latency of acute seizure attack group rats significantly decreased at the 1 st day and 5 th day of test trail.

CONCLUSIONChronic amygdala kindled seizures increase memory retention of passive-avoidance test in rats, and acute seizure attack impairs this action.

Amygdala ; physiology ; Animals ; Avoidance Learning ; Electric Stimulation ; Kindling, Neurologic ; physiology ; Male ; Memory ; physiology ; Random Allocation ; Rats ; Rats, Sprague-Dawley ; Seizures ; physiopathology

OBJECTIVETo assess the regional left ventricular systolic function of children with Kawasaki disease before and after treatment by vector myocardial strain and strain rate imaging (VSI) technology.

METHODSThe regional left ventricular systolic function was assessed using VSI technology in 32 children with Kawasaki disease before treatment and one month after treatment and in 30 age-matched normal children.

RESULTSNine segments of the left ventricular in the Kawasaki disease group before treatment had decreased longitudinal peak systolic strain rate (LSRs) compared with the normal control group. After treatment, the LSRs in 9 segments in the Kawasaki disease group increased, but 6 segments had decreased LSRs compared with the normal control group. The radial peak systolic strain rate (RSRs) of 8 segments in the Kawasaki disease group before treatment was lower than that in the control group. After treatment, only one segment had decreased RSRs compared with the control normal group and 5 segments had increased RSRs compared with that before treatment. The circumferential peak systolic velocity (CVs) of 6 segments in the Kawasaki disease group before treatment group was lower than that in the control normal group. After treatment, only one segment had decreased CVs in the Kawasaki disease group compared with the control normal group and 3 segments had increased CVs compared with that before treatment.

CONCLUSIONSThe regional left ventricular systolic function in children with Kawasaki disease before and after treatment can be accurately assessed using VSI technology, which shows the clinical significance of this technology in assessment of treatment outcome in children with Kawasaki disease.

Child, Preschool ; Female ; Humans ; Image Interpretation, Computer-Assisted ; Infant ; Male ; Mucocutaneous Lymph Node Syndrome ; physiopathology ; Stress, Mechanical ; Systole ; physiology ; Ventricular Function, Left ; physiology

OBJECTIVETo study the value of Xstrain technology in the evaluation of cardiac function in children with tonsil adenoidal hypertrophy (TAH).

METHODSThirty-five children with TAH (TAH group) and 20 normal age-matched children (control group) were enrolled. The left ventricular wall movement in the vertical, radial and circumferential directions and the right ventricular tricuspid annulus movement were detected using Xstrain technology.

RESULTSThe systolic and early diastolic velocities of tricuspid annulus in the TAH group were higher than those in the control group. The systolic and diastolic circumferential velocities of the middle lateral wall and back wall of left ventricular in the TAH group were lower than those in the control group. The systolic and early diastolic vertical velocities of the basement of left ventricular wall in the TAH group were higher than those in the control group. There was no significant difference in the radial velocity between the two groups.

CONCLUSIONSEarly changes in the cardiac function can be found by Xstrain technology in children with TAH. Xstrain technology can provide a reliable basis for cardiovascular evaluation in children with TAH.

Adenoids ; pathology ; Adolescent ; Child ; Child, Preschool ; Female ; Heart ; physiopathology ; Heart Function Tests ; methods ; Humans ; Hypertrophy ; Male