Eight phenolic compounds were isolated from Rhododendron phaeochrysum var. agglutinatum and their sructures were identified as phaeochrysin (1), (2R)-4-(3',4'-dihydroxyphenyl) -2-butanol (2), (-) -rhododendrol (3), rhododendrin (4), (+) -isolariciresinol (5), (-) -lyoniresinol (6), lyoniresinol-9'-O-β-D-xylopyranoside (7), and dihydrodehydrodiconiferyl-3a-O-α-L-rhamnopyranoside (8). Compound 1 is new, and compounds 2, 5-8 were isolated from this plant for the first time.
Drugs, Chinese Herbal ; chemistry ; Mass Spectrometry ; Molecular Structure ; Phenols ; chemistry ; Rhododendron ; chemistry

OBJECTIVETo investigate the effects of exercise (EX), low-fat diet (LFD) and their combination intervention on the tumor necrosis factor-alpha (TNF-alpha) expression of insulin resistance in rats.

METHODSOne hundred and thirty male rats randomly assigned to 2 groups: Control (CON)-10 rats consuming a low-fat diet; HFD-120 rats consuming a high-fat diet (HFD). The dietary regimen was sustained for 8 wk, at which point the 40 HFD group rats gaining the most weight were referred to as the obese rats. Glucose tolerance was assessed by an oral glucose tolerance test (OGTT). During the procedure of OGTT, the blood was drawn for insulin assay (insulin release test). The whole body insulin resistance was assessed by glucose-insulin index. The obese HFD group rats were randomized into one of four intervention groups: HFD-sedentary (HFD-SED), HFD-exercise(HFD-EX), low fat diet-SED (LFD-SED), LFD-EX. Ex rats performed 8-wk exercise training on a motorized treadmill. The CON group had access to low-fat diet for another 8 wk. After 8 wk of exercise and low-fat diet intervention, the OGTT and insulin release test were performed again. To use ELISA technique for detecting TNF-alpha in soleus muscle and adipose tissue.

RESULTSAfter being fed high-fat diet for 8 wk, glucose-insulin index in the HFD group were significantly greater than that in CON group (P < 0.01). After 8-week exercise and low-fat diet intervention, glucose-insulin index in HFD-SED group was significantly greater than that in CON group (P < 0.01). The index in three intervention groups was significantly less than that in HFD-SED group (P < 0.01) . TNF-alpha content in adipose tissue and the soleus muscle for HFD-SED group was significantly greater than that in CON group (P < 0.01). Three intervention groups were significantly less than HFD-SED group (P < 0.01).

CONCLUSIONExercise and low-fat diet interventions can decrease the TNF-alpha expression in insulin resistance rat.

Animals ; Diet, Fat-Restricted ; Insulin Resistance ; Male ; Obesity ; metabolism ; Physical Conditioning, Animal ; Rats ; Rats, Sprague-Dawley ; Tumor Necrosis Factor-alpha ; metabolism

Objective To assess the safety and efficacy of transcatheter closure of congenital coronary artery fistulas(CAFs).Methods Retrospective analysis was performed on 19 patients mean age of(5.5?4.1) years treated from February 1995 to December 2005 with transcatheter closure of CAFs using transcatheter spring coil embolization,Amplatzer PDA occluder or Amplatzer plug.One case had a residul fistula postoperatively associated with patent duetus arteriosus(PDA).Results The abnormal parameters included mean fistula diameter(3.7?1.6)mm(2.5-8.2 mm),pulmonary mean pressure(28.0?5.0)mmHg(25.0-67.0 mmHg)and pulmonary to systemic shunt(Qp/Qs)1,6?0.8(1.0-2.3).The sites of the fistulas were originated in right coronary artery 11,left anterior descending coronary artery or left circumflex coronary artery 8. Abnormal communication sites of these fistulas were to right ventricle in 14 and right atrium in 5.Various occlusion devices used to close these fistulas included one Giantureo coil in 10,2-4 Gianturco coils in 3, Duct-Occlud in 3,Amplatzer duct occluder in 2 and Amplatzer plug in 1.The post-operative residul fistula with PDA was treated successfully with PDA occlusion.The immediate,one month and one year complete occlusion rates were 55.6%(10/18),88.9%(16/18),100%(18/18),respectively.The coil slipped into the left pulmonary artery in 1 case and correction was obtained by retrieving with forceps.Follow-up studies at 3 months to 4.3 years showed complete abolition of shunt in all patients with no evidence of recanalization leading to recurrences of shunt.Conclusion Transcatheter closure of CAFs is a safe and effective alternative to surgical repair.

The heat shock protein ClpB is a member of the Clp family and functions as molecular chaperones. ClpB is related to the acquired thermotolerance in organisms. A cDNA of 3144 bp was screened out of a tomato cDNA library. The polypeptide deduced from the longest ORF contains 980 amino acid residues, and was classified into HSP100/ClpB family based on the result of molecular phylogenesis analysis. Thus it was named as LeHSP110/ClpB according to its calculated molecular weight. LeHSP110/ClpB was characteristic of heat-inducibility but no constitutive expression, and was demonstrated to locate in chloroplastic stroma. An antisense cDNA fragment of LeHsp110/ClpB under the control of CaMV 35S promoter was introduced into tomato by Agrobacterium tumefactions-mediated method. At high temperature, the mRNA levels of LeHsp110/ClpB in antisense transgenic plants were lower than those in control plants. The PS II of transgenic plants is more sensitive to high temperature than that of control plants according to data of Fv/Fm. These results clearly showed that HSP110/ClpB plays an important role in thermotolerance of high plants.
Adaptation, Physiological ; genetics ; Chloroplasts ; metabolism ; Cloning, Molecular ; Genes, Plant ; genetics ; HSP110 Heat-Shock Proteins ; genetics ; metabolism ; Hot Temperature ; Lycopersicon esculentum ; genetics ; physiology ; Photosystem II Protein Complex ; metabolism ; Plant Proteins ; genetics ; metabolism ; Plants, Genetically Modified ; genetics ; physiology

BACKGROUNDAnimal models are needed for the study of rapid tooth movement into the extraction socket through distraction osteogenesis of the periodontal ligament.

METHODSModified distraction devices were placed on eight dogs between the first and third mandibular premolars on the left sides; similar placement of traditional straight wise appliances on the right sides served as the control. The experimental distractors were activated (0.25 mm/d) twice a day and the control devices were activated (100 g) for two weeks with consolidation periods at weeks two, three, six, and ten. Two dogs were sacrificed at each consolidation time point; rates and patterns of tooth movement, loss of anchorage, and periapical films were evaluated, and the affected premolars and surrounding periodontal tissues were decalcified and examined histologically. General observations, X-ray periapical filming and histology examination were performed.

RESULTSDistal movement ((3.66+/-0.14) mm) measured two weeks after modified distraction exceeded that achieved using the traditional device ((1.15+/-0.21) mm; P<0.05). Loss of anchorage was minimally averaged (0.34+/-0.06) mm and (0.32+/-0.07) mm in the experimental and control sides, respectively. By radiography, apical and lateral surface root resorptions on both sides were minimal. Alveolar bone lesions were never evident. Fibroblasts were enriched in periodontal ligaments and bone spicules formed actively along directions of distraction.

CONCLUSIONSThe canine model is suitable for the study of rapid tooth movement through distraction osteogenesis of the periodontal ligament. The technique accelerates tooth movement, periodontal remodeling, alveolar bone absorption, and may induce fibroblast formation, as compared to the traditional orthodontic method, without adversely affecting root absorption, bone loss, tooth mobility and anchorage loss.

Animals ; Dogs ; Male ; Osteogenesis, Distraction ; methods ; Periodontal Ligament ; physiology ; surgery ; Root Resorption ; etiology ; Tooth Movement Techniques ; methods

OBJECTIVEPerimembranous ventricular septal defects (PMVSDs) is the most common type of congenital ventricular septal defects (VSD), which accounts for 70% approximately 80% of VSD. The structure of PMVSDs is very complex, it is close to tricuspid valve, mitral valve and aortic valve. The atrioventricular (AV) node is located in the posterior upper membranous ventricular septum and branches into left and right bundle in the posterior lower margin. This increases the risk of transcatheter closure of PMVSDs. Arrhythmias is the common complication after transcatheter closure of PMVSDs. The present study aimed to identify the risk factors resulting in arrhythmias after transcatheter closure of PMVSDs in patients under 18 years of age to decrease the incidence of arrhythmias after the interventional catheterization.

METHODSA retrospective analysis was performed on the patients treated with transcatheter intervention from June 2002 to June 2004. Transcatheter closure of PMVSDs with Amplatzer membranous septal occluder and a domestic product was performed in 89 cases after obtaining consent themselves and/or their guardian or parents, 47 cases were males and 42 females. The age of the cases ranged from 3 to 18 years (mean 8.2 years) and the body weight ranged from 13 to 55 kg (mean 26.7 kg). They were all diagnosed as having PMVSDs with trans-thoracic echocardiography (TTE) before the interventional catheterization, the electrocardiographic (ECG) and chest X-ray (CXR) findings were recorded. A simultaneous care ECG and TTE were performed during operation in order to identify the effect of the transcatheter closure, the heart structure and functional changes and whether or not arrhythmias occurred, respectively. In 80 cases AGA Amplatzer membranous septal occluder was used and in 9 cases a domestic product was used. Follow-up was performed based on the echocardiography and ECG.

RESULTSThe devices were successfully implanted in 89 cases; 11 cases (12%) developed various block of heart conduction within 5 days, which included first degree AV block in 1 patient, third degree AV block in 1, left anterior bundle branch block in 5, partial right bundle branch block in 4, complete right bundle branch block in 3, and 3 patients had two kinds of heart block. Eight patients were treated with corticosteroids, 6 of them recovered within 14 days, 1 patient within 1 month and in 1 case the problem shifted from first degree block and left anterior bundle branch block to left anterior bundle branch block 5 days later and that persisted for 6 months. It was found that the distance from upper margin of defects to the aortic valve < 3 mm, the diameter of ventricular septal defect > or = 8 mm, the diameter of device > or = 10 mm, blood pH < 7.35 and arteriovenous track building time after the success of the Seldinger technique > or = 60 min were independent predictors of post-closure arrhythmias.

CONCLUSIONArrhythmias remain the severe early complications after interventional catheterization for PMVSDs in patients under 18 years of age. Shortening of operation time, prevention of acidosis and strict selection of indications may be the most effective measures to prevent arrhythmias after transcatheter closure of PMVSDs in patients under 18 years of age.

Adolescent ; Cardiac Catheterization ; adverse effects ; Child ; Child, Preschool ; Female ; Heart Block ; etiology ; Heart Septal Defects, Ventricular ; therapy ; Humans ; Male ; Retrospective Studies ; Risk Factors

OBJECTIVESTo analyze the relationship between oxidized low density lipoprotein (oxLDL), angiogenesis and stabilization of atherosclerotic plaques in human coronary arteries; and to investigate the role of oxLDL in creating vulnerable sites in atherosclerotic plaques.

METHODSSamples of coronary arteries were obtained at autopsies of 42 patients with acute coronary syndrome. Eighty randomly selected blocks were studied by immunohistochemistry using antibodies against oxLDL and endothelial cells (factor VIII). Computer-aided planimeter was used for quantitative analysis.

RESULTSIn unstable plaques, percentage of immunoreactive areas for oxLDL was significantly higher than that in stable plaques. Most of the oxLDL were located in shoulder region of these plaques, as compared to the fibrous cap and basal regions. The details of distribution of oxLDL were as follows: shoulder region (20.43 +/- 3.12 for unstable plaques and 17.65 +/- 4.22 for stable plaques), fibrous cap (4.77 +/- 2.03 for unstable plaque and 2.80 +/- 0.22 for stable plaques) and basal region (5.65 +/- 1.65 for unstable plaques and 3.22 +/- 1.02 for unstable plaques). OxLDL was also a main component in the lipid core. In the shoulder region, there was a significant positive correlation between neovascularization and oxLDL (r = 0.8247, P = 0.000).

CONCLUSIONSThe amount of oxLDL is significantly higher in unstable atherosclerotic plaques, especially over the shoulder region. OxLDL in coronary atherosclerotic plaques is thus an important factor in determining stabilization of the plaques. OxLDL may induce influx of inflammatory cells which subsequently leads to decreased plaque stabilization.

Angina, Unstable ; metabolism ; pathology ; Coronary Artery Disease ; metabolism ; pathology ; Humans ; Immunohistochemistry ; Lipoproteins, LDL ; metabolism ; Myocardial Infarction ; metabolism ; pathology ; Neovascularization, Pathologic ; metabolism ; pathology

AIMTo explore the role of femoral nerves section (FNS) on the protection of limb ischemic preconditioning (LIP) against cerebral ischemia/reperfusion injuries.

METHODSModel of brain ischemia induced by Four-vessel occlusion was used. LIP was performed by clamping the bilateral femoral arteries for 10 min 3 times in a interval of 10 min. Rats with vertebral arteries permanently occluded were divided into sham group, cerebral ischemic group, FNS + cerebral ischemic group, LIP + cerebral ischemic group, FNS + LIP + cerebral ischemic group. The changes of neural density (ND) in the CA1 hippocampus were observed 7d after the sham operation or brain ischemia under thionin staining. The expression of c-Fos in the CA1 hippocampus was measured 6 h after the sham operation or brain ischemia under immunohistochemistry method.

RESULTSThionin staining revealed that serious neuronal damage was visualized in the CA1 hippocampus in both cerebral ischemic group and FNS + cerebral ischemic group as compared with sham group. LIP attenuated the neuronal damage of the CA1 subfield induced normally by cerebral ischemia/reperfusion, and ND in LIP + cerebral ischemic group was significantly higher than that in cerebral ischemic group (P < 0.01). But obvious neuronal damage of the CA1 subfield was found in FNS+ LIP + cerebral ischemic group, and ND was significantly decreased as compared with LIP + cerebral ischemic group (P < 0.01). These results suggested that the protection of LIP against cerebral ischemia/reperfusion injuries might be cancelled by preceding section of femoral nerve. It was found that there was almost no c-Fos expression in the CA1 hippocampus in sham group. Changes of c-Fos expression in the CA1 subfield in cerebral ischemic group were similar to that in sham group. But in LIP + cerebral ischemic group, c-Fos expression in the CA1 subfield was markedly increased and the number of positive cells and optical density of c-Fos expression were significantly higher than those in sham and cerebral ischemic group. c-Fos expression in the CA1 subfield was again decreased in FNS + LIP + cerebral ischemic group, and the number of positive cells and optical density of c-Fos expression were significantly lower than those in LIP + cerebral ischemic group.

CONCLUSIONNeural pathway participated in the protective effect of LIP on brain, and increased c-Fos expression in the CA1 hippocampus by LIP after cerebral ischemia/reperfusion, might be a part of neural pathway by which LIP induced brain ischemic tolerance.

Animals ; Brain Ischemia ; physiopathology ; Extremities ; blood supply ; Ischemic Preconditioning ; methods ; Male ; Neural Pathways ; physiopathology ; Rats ; Rats, Wistar ; Reperfusion Injury ; physiopathology

OBJECTIVEThis study was to investigate an operation, in which removing breast cysts of foreign body resulted from augmentation with polyacrylamide hydrogel injection was performed simultaneously with silicone prosthesis implantation under SEPS endoscope in order to relieve tissue injury and increase the accuracy of clearance.

METHODSEight patients were included in this study. Preoperative type B ultrasound examination was performed to mark the mass. Through an axillary approach, the cysts of foreign body that were distributed in the subcutaneous tissue, breast or muscle were separated and ablated under SEPS endoscope. After removal of the foreign body, a silicone implant was located submuscularly for breast augmentation.

RESULTSThe operations were completed without hematoma and infection. Follow-up of the eight patients for 3 to 12 months showed that preoperative symptoms relating to the injected material, such as breast pain, lump and asymmetry, have no longer existed. The shapes of the breasts were satisfactory.

CONCLUSIONSWe believe that endoscope-assisted mammoplasty offers more satisfactory clinical results with less injury, less morbidity, less scars, more accuracy and greater patient acceptance.

Acrylic Resins ; Adult ; Breast Implantation ; methods ; Breast Implants ; Endoscopy ; Female ; Follow-Up Studies ; Foreign Bodies ; Humans ; Mammaplasty ; methods ; Silicone Gels ; Treatment Outcome ; Young Adult

OBJECTIVETo study the expressions of p35 and p25 and Cdk5 kinase activity in cultured rats hippocampal neurons following X-ray exposure to provide experimental evidence for prevention and treatment of radiation encephalopathy.

METHODSThe hippocampal neurons cultured for 12 days were subjected to a single-dose X-ray exposure of 30 Gy. Western blotting was used to detect the p35 and p25 protein levels, and the effect of pretreatment with roscovitine, a Cdk5 inhibitor, on the apoptosis of the hippocampal neurons following the exposure was examined with 4',6-diamidino-2-phenylindole (DAPI) staining.

RESULTSThe protein level of p35 increased significantly 3.5 and 4 h after the irradiation by 1.51-/+0.13 and 1.45-/+0.14 folds in comparison with the control level, respectively (P<0.01), and the p25 level increased significantly 6 h after irradiation by 1.62-/+0.28 folds (P<0.05). Nuclear condensation occurred in (24.8-/+3.97)% of the neurons 24 h after 30 Gy X-ray exposure, a rate significantly higher than that in the nonexposed cells [(1.82-/+1.08)%, P<0.01) and that in roscovitine-pretreated neurons [(7.74-/+2.27)%, P<0.01).

CONCLUSIONX-ray exposure activates Cdk5 by increasing the p35 and p25 expressions in rat hippocampal neurons, and inhibition of Cdk5 activity with roscovitine can significantly protect the neurons from apoptosis.

Animals ; Animals, Newborn ; Cells, Cultured ; Cyclin-Dependent Kinase 5 ; genetics ; metabolism ; Female ; Hippocampus ; cytology ; metabolism ; radiation effects ; Male ; Neurons ; cytology ; metabolism ; radiation effects ; Phosphotransferases ; genetics ; metabolism ; Rats ; Rats, Sprague-Dawley