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PUE@PEG-PLGA micelles has excellent characteristics such as small particle size, high drug loading and slow drug release. The results of TEM electron microscopy showed that PUE@PEG-PLGA micelles had obvious core-shell structure. The critical micelle concentration(CMC) of PEG-PLGA micelles determined by pyrene assay was about 4.8 mg·L~(-1). Laser confocal experiments showed that PEG-PLGA micelles can enhance the cellular uptake of coumarin-6 and aggregate around the mitochondria; quantitative results of extracellular drug residues also indirectly confirmed that PEG-PLGA micelles can promote cellular uptake of the drug. Acute ischemic myocardial model rats were prepared by coronary artery ligation, and then the model rats were randomly divided into six groups: Sham operation group, model group, puerarin(PUE) group, as well as low-, mid-, and high-dose PUE@PEG-PLGA micelles groups. Drugs were given by iv administration 5 min after the ligation. The ST segment changes in the electrocardiogram were monitored; serum creatine kinase(CK), lactate dehydrogenase(LDH), aspartate aminotransferase(AST), and malondialdehyde(MDA) levels were detected and myocardial infarct size was also measured. Both PUE and PUE@PEG-PLGA micelles can reduce the elevated ST segment, reduce serum CK, LDH, AST and MDA levels, and reduce myocardial infarct size. The efficacy of PUE@PEG-PLGA medium and high dose groups was significantly better than that in the PUE group, and the efficacy in PUE@PEG-PLGA low dose group was basically equivalent to that in the PUE group. PUE@PEG-PLGA micelles can greatly improve the cardiomyocytes uptake of PUE, enhance the anti-acute myocardial ischemia effect of drugs, and reduce its dosage.
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Animals , Rats , Isoflavones , Pharmacology , Micelles , Myocardial Ischemia , Drug Therapy , Polyesters , Polyethylene Glycols , Random AllocationABSTRACT
Objective To study the survey outcome of idiopathic scoliosis ( AIS) in 12 881 junior middle school students from Shantou city ,Guangdong province.Methods From October 2013 to January 2015,the survey of AIS was carried out in 12 881 junior middle school students from 10 middle schools in Shantou city ,Guangdong province.Three methods such as school screening ,hospital review and X -ray film examination were used.The two five surface checking method was used as physical examination method .X-ray was used to slicing a positive lateral view of the whole spine as standing position.The persons whose Cobb angles ≥10°were diagnosed as AIS.Results The amount of individual with suspicious signs were 1 543 students,the suspected rate was 11.98%.Meanwhile,a further checking was conducted by hospital to 263 students,the response rate was 17.04% and 136 students were diagnosed as AIS.The positive rate of AIS was 51.71%.Conclusion The prevalence of AIS in junior middle school students in Shantou city is higher than national average level.Therefore,it is necessary to attach attention to the census for AIS.
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Objective To study the value of transfer constant(Ktrans)derived from dynamic contrast-enhanced MRI (DCE-MRI) for quantitative evaluation of Ki-67 labeling index (Ki-67 LI) in glioma. Methods Twenty patients with glioma who underwent DCE-MRI and operation were retrospectively reviewed. The Ktrans value and Ki-67 LI were acquired and correlated using the Spearman correlation test. Also, the Ktrans values were compared between high(larger than 10%)and low(no more than 10%)Ki-67 LI group with Mann-Whitney U test, receiver operating characteristic curves was performed to evaluate the diagnostic value. Results The Ktrans value(0.0165 to 0.8048, median 0.1252)was significantly associated with Ki-67 LI(5%to 50%, median 20%) (r=0.721,P<0.001), and the Ktrans value was significantly higher in high Ki-67 group(0.0810 to 0.8048, median 0.1810)than that in low Ki-67 LI group(0.0165 to 0.1456, median 0.0697)(Z=-3.209, P=0.001). The most predictive Ktrans value differentiated high Ki-67 LI and low Ki-67 LI with an area under the curve(AUC) of 0.945 at a sensitivity of 92.3% and specificity of 85.7%. Conclusion Ktrans value could be used for quantitative evaluation of Ki-67 LI in glioma.
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<p><b>OBJECTIVE</b>To assess the value of contrast enhanced MRI features for predicting epidermal growth factor receptor () gene amplification in glioblastoma multiforme (GBM) with radiomic method.</p><p><b>METHODS</b>Eighty patients withstatus examined GBM were retrospectively reviewed. The data were randomly divided into a training dataset (60%) and test dataset (40%). Texture features of each case were extracted from the enhanced region and the edema region in contrast enhanced MR images. Principal component analysis was used for dimension reduction. Random forest model, support vector machine model and neural network model were built. Area under the curve (AUC) of the receiver operating characteristics curve was used to assess the performance of models with test dataset.</p><p><b>RESULTS</b>A total of 542 features were extracted from the enhanced region and the edema region. Forty-eight principal components were obtained, which accounted for 100% accumulation contribution rate, and the first 31 principal components were selected for models building, which accounted for 98.5% accumulation contribution rate. The values of AUCs were 0.74, 0.69 and 0.63 for random forest model, support vector machine model and neural network model in the test dataset, respectively.</p><p><b>CONCLUSIONS</b>Radiomic method with proper model may have a potential role in predicting thegene status with enhanced MRI features derived from the enhanced region and the edema region in patients with glioblastoma multiforme.</p>
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<p><b>BACKGROUND</b>Patients with Alzheimer's disease (AD) manifest progressive decline in writing abilities. Most studies on agraphia in AD have been performed in the alphabetic system, such as English. However, these findings may not be applicable to other written language systems. The unique features of the Chinese written script could affect the patterns of agraphia in Chinese AD patients. The aim of this study was to explore the features of writing errors in Chinese patients with AD and amnestic mild cognitive impairment (a-MCI), as well as to study the relationship between their writing errors and neuropsychological functions.</p><p><b>METHODS</b>In this study, we performed an observational study in a group of subjects including 17 AD patients, 14 patients with a-MCI, and 16 elderly healthy controls. We analyzed the writing errors in these subjects and also studied the relationship between their writing errors and neuropsychological functions.</p><p><b>RESULTS</b>Our study showed that in patients whose mother tongue is Chinese, writing ability was comparatively well preserved in the MCI phase but significantly impaired when the disease progressed to the stage of AD. The writing errors showed corresponding increase with the severity of cognition decline, both in the types of errors and rate of occurrence. Analysis of the writing errors showed that word substitution and unintelligible words were the most frequent error types that occurred in all the three study groups. The occurrence rate of unintelligible words was significantly higher in the AD group compared with the a-MCI group (P = 0.024) and control group (P = 0.018). In addition, the occurrence rates of word substitution were also significantly higher in AD (P = 0.013) and a-MCI groups (P = 0.037) than that of control group. However, errors such as totally no response, visuospatial impairment, paragraph agraphia, ideograph, and perseverative writing errors were only seen in AD group. Besides, we also found a high occurrence rate of visuoconstructional errors (13.3%) in our AD group.</p><p><b>CONCLUSIONS</b>Our study confirmed that agraphia is an important feature in patients with AD. The writing error profile in patients whose native language is Chinese was unique compared to patients using the alphabetic language system.</p>
Subject(s)
Aged , Female , Humans , Male , Middle Aged , Agraphia , Diagnosis , Alzheimer Disease , Asian People , Cognition Disorders , Diagnosis , Cognitive Dysfunction , Diagnosis , Neuropsychological TestsABSTRACT
Objective To evaluate three different tracer-kinetic models used for dynamic contrast-enhanced MRI (DCE-MRI) data processing in the prediction of the histopathologic grade of cerebral gliomas.Methods Forty-one patients with histopathologically graded gliomas (grade Ⅱ 13,grade Ⅲ 14,grade Ⅳ 14)were imaged with DCE-MRI from March,2013 to November,2014.The values of Ktrans of gliomas were obtained by three tracer-kinetic models,which were Patlak model,Tofts model and Extended Tofts Linear model.All data were analyzed statistically by a Graphpad 6.0 statistical software.Comparison of the differences of Ktrans among different grades of gliomas was conducted using the Kruskal-Wallis test and Dunn's multiple comparisons test for the data not conform to normal distribution.Correlations of Ktrans values among those three models were analyzed using linear regression analysis,The differences of Ktrans between low grades and high grades of gliomas was conducted using the Mann-Whitney U test.Receiver operating characteristic (ROC) curve analyses were performed to determine the cut-off values for Ktrans to distinguish different low grades and high grades of gliomas.Results The Ktrans values obtained by Patlak model was 0.008(0.004-0.043) min-1for grade Ⅱ,0.021(0.005-0.088) min-1 for grade Ⅲ,and 0.035(0.017-0.061) min-1 for grade Ⅳ.The Ktrans values obtained by Tofts model was 0.085 (0.041-0.158)min 1for grade Ⅱ,0.140 (0.063-0.315) min-1for grade Ⅲ,0.229 (0.126-0.419)min 1 for grade Ⅳ.The Ktrans values obtained by Extended Tofts Linear model was 0.012 (0.004-0.092) min 1 for grade Ⅱ,0.048 (0.010-0.188) min-t for grade Ⅲ,0.094 (0.036-0.215)min 1 for grade Ⅳ.All the Ktrans values obtained by three models increased when the histological grades increased,with statistical significance between grade Ⅱ and Ⅲ (H=18.31,18.09,20.18,P＜0.05).Ktrans values among the three models had good linear correlations.The Ktrans obtained by Extended Tofts Linear model had good linear correlations with both Patlak model and Tofts model (r=0.933,0.893,P＜0.05),and the Ktrans obtained by Patlak model had less linear correlation with Tofts model (r=0.822,P＜0.05).The K values were statistically different between LGG and HGG (P＜0.01).The cut-off value of K provided good combination of sensitivity and specificity in the differentiation between LGG and HGG,and the K obtained by Extended Tofts Linear model had the best sensitivity and specificity among the three models (sensitivity 92.3％,specificity 85.7％).Conclusions K from DCE-MRI has a high performance in predicting the histopathologic grade of brain glioma,and the Extended Tofts Linear model is more suitable for the evaluation of cerebral glioma.
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Objective To explore the appropriat.e treatment process for elderly patients with intertrochanteric fracture in primary hospitals.Methods According with the evaluation system and the characteristics of the grassroots hospitals and elderly patients with intertrochanteric fractures,the treatment standards for risk assessment was established,and the appropriate treatment process for intertrochanteric fracture in elderly patients in primary hospitals was initially formed and tried to promote applications in three primary hospital from December 2010 to January 2012,and its feasibility and effectiveness were tested.Results 66 elderly patients with intertrochanteric fracture were treated in three primary hospital,and 38 cases were hospitalized in primary hospital,including 24 cases of osseous union in 27cases treated with expectant treatment,11 cases of surgical treatment,and the cure rate was 89.5％.Sent on the operation rate of 90.3％ cases,54.8％ of cases occurred within 2 days.The incident of complications in early stage was 25.8％.Conclusion The diagnosis and treatment process and assessment criteria of treatment risk for elderly patients with intertrochanteric fracture in the primary hospital which is initial established is simple,practical,practicable,and has good effect and certain clinical value.
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Objective To explore the value of high sensitivity total spine digital radiography in radiation protection and clinical application.Methods A total of 90 patients suffering from scoliosis were randomly divided into three groups with different sensitivity such as S200,S400 and S800.All of them were examined with anterior-posterior and lateral full length spine digital radiography.The S400 group was designated as control group.The doses (mGy) and exposures (mAs) resulted from different groups were calculated and compared,including their means and deviations.Image quality was evaluated with blind method.Results In the S800 group,the doses and exposures were about 43％ and 41％ compared to the S400 group.The differences were statistically significant (t =4.573,8.038,P ＜ 0.05).Doses and exposures in the S200 group were about 187％ and 178％ compared to the control group.The differences were also significant(t =-5.624,-4.052,P ＜ 0.05).In the S200 and S400 group,image quality of anterior-posterior and lateral position was 100％ good.When sensitivity was S800 was selected,image quality of the anterior-posterior position was 100％ good,and 97％ for lateral images.One lateral image was considered noisy.Conclusions In full length spine radiography,high sensitivity (S800) could greatly reduce radiation dose to patients.It is a good choice to use the sensitivity to observe wide-range spine.
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<p><b>OBJECTIVE</b>To investigate the correlation of neurochemical metabolism in hippocampus with memory function in young adult patients with first-episode depression.</p><p><b>METHODS</b>Twenty patients with first-episode depression (patient group) and fifteen health subjects (control group) were enrolled in the study. The neurochemical metabolism, including the levels of N-acetylaspartate (NAA), Choline (Cho), Creatine (Cr), Myoinositol (mI) were measured by proton magnetic resonance spectroscope (1H-MRS) in bilateral hippocampus. Wechsler Memory Scale (WMS) were used to examine the memory function in both groups.</p><p><b>RESULTS</b>The memory quotient (89.15 ±6.62) of patient group was significantly lower than that of controls (P <0.01),the scores of long-term memory,short-term memory and immediate memory in patients were also lower than those of controls (P<0.05 or 0.01). In patient group, the ratio of NAA/Cr (1.34 ±0.08) in the left hippocampus was significantly lower than that of control group (P<0.01); and the ratio of mI/Cr in the bilateral hippocampus [(0.63 ±0.13) in left and (0.6 ±0.1) in right] was significantly higher than those in control group (P<0.05). In patient group,the ratio of NAA/Cr in the left hippocampus was positively correlated with WMS scores (P<0.01), and the ratio of mI/Cr in the left hippocampus was negatively correlated with WMS scores (P<0.05).</p><p><b>CONCLUSION</b>The memory deficit and abnormal metabolism function of neuron cell in hippocampus coexist in young adult patients with first-episode depression, and the lower NAA/Cr and higher mI/Cr ratio in the left hippocampus may result in the memory deficit.</p>
Subject(s)
Adolescent , Adult , Female , Humans , Male , Young Adult , Aspartic Acid , Metabolism , Case-Control Studies , Creatine , Metabolism , Depressive Disorder , Metabolism , Hippocampus , Metabolism , Inositol , Metabolism , Magnetic Resonance Spectroscopy , Memory , Neuropsychological TestsABSTRACT
Objective To explore the clinical effect of lubar intervertebral disc protrusion treatment with ozone injection combined radiofrequency thermocoagulation. Methods 36 patients with lubar intervertebral disc protrusion confirmed by clinical and imaging examination were underwent radiofrequency thermocoagulation followed ozone injection guided with CT. Results All the patients were followed up for 3 ～6 months,and statistic the improvement rate was evaluated according to Macnab standard. The total effective rate was 94.4%, and the improvement rate was 86.1%. Conclusion CT guided treatment could greatly elevate the accuracy of puncture. Radiofrequency target point thermocoagulation combined with ozone injection was a minimally invasive、safet and markedly effective method for lubar intervertebral disc protrusion treatment.
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Objective To evaluate the effect of mental intervention combined with simple brachial plexus anesthesia in children' upper extremity operation. Method 80 cases of8 ～ 12 years old children were selected after strict evaluation and screening,of who needed upper extremity operation(fractures internal fixation not included) ,and the surgery time less than 120 minutes. All the operations were completed under the simple brachial plexus anesthesia, and combined with mental intervention preoperatively and intraoperatively. The changes of HR and BP intraoperatively the psyche condition after the operation completed were observed and followed up the mental change postoperatively. Result All the operation were completed. The HR and BP were stable intraoperation (P ＞ 0. 05), the psyche was quiet after the operation completed,and no mental disorder was happened postoperative. Conclusion The mental intervention combined with simple brachial plexus anesthesia was safe in 8 ～ 12 years old children' upper extremity operation, and it deserved to spread and apply.
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Objective To explore clinical application of coronary artery imaging with 64-slice spiral CT.Methods 46 patients with coronary heart disease were undergone both coronary artery imaging with 64-slice spiral CT and coronary angiography,and the effects on coronary display respectively were compared Results Coronary display in coronary artery imaging with 64-slice spiral CT was better than that of the coronary angiography, which was a inspection pattern of noninvasive coronary display. Conclusion Coronary artery imaging with 64-slice spiral CT can accurately evaluate coronary artery stenosis, which was worth to application.
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Objective To study MRI volumetric measurement of hippocampal formation using statistic parametric mapping(SPM) software and to discuss the value of the method applied to Alzheimer's disease (AD).Methods The SPM software was used to divide the three-dimensional MRI brain image into gray matter, white matter and CSF separately.The bilateral hippocampal formations in both AD group and normal control group were delineated and the volumes were measured.The SPM method was compared with conventional method based on region of interest (ROI), which was the gold standard of volume measurement The time used in measuring the volume by these two methods were respectively recorded and compared by two independent samples' t test.Moreover, 7 physicians measured the left hippocampal formation of one same control with both of the two methods.The frequency distribution and dispersion of data acquired with the two methods were evaluated using standard deviation coefficient Results (1)The volume of the bilateral hippocampal formations with SPM method was (1.88±0.07) cm~3 and (1.93±0.08) cm~3 respectively in the AD group, while was (2.99 ±0.07) cm~3 and (3.02 ±0.06) cm~3 in the control group .The volume of bilateral hippocampal formations measured by ROI method was (1.87 ±0.06) cm~3 and (1.91 ±0.09) cm~3 in the AD group, while was (2.97 ±0.08)cm~3 and (3.00 ±0.05) cm~3 in the control group.There was no significant difference between SPM method and conventional ROI method in the AD group and the control group(t=1.500, 1.617, 1.095, 1.889,P> 0.05) .However, the time used for delineation and volume measurement was significantly different.The time used in SPM measurement was (38.1 ±2.0) min, while that in ROI measurement was (55.4 ±2.4) min (t=-25.918, P<0.01).(2)The average volumes of the left hippocampal formation with the two methods measured by the 7 physicians were (2.86±0.20) and (2.76±0.52) cm~3 respectively.The frequency distribution of hippocampal formation volume measured by SPM method and ROI method was different.The CV_(SPM) was 7% and the CV_(ROI) was 19%.Conclusions The borders of hippocampus formation in brain gray matter could be conveniently delineated by SPM software.The accuracy and repetition of measurement was improved by SPM method.The shorter time used in measurement made it possible for MRI volumetric measurement of hippocampal formation to be applied in assessment of relevant neuropsychiatric diseases.
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Objective:To evaluate the anti-HIV-1 activity of two new nonnucleoside reverse transcriptase inhibitors (NNRTIs), JB25 and JB26, in combination with 3 approved drugs (AZT, EFV, SQV)in vitro.Methods:The serially diluted 10 concentrations of JB25 and JB26 were combined with 7 serially diluted AZT, EFV and SQV respectively.The combination was added to 384 cell culture plates and then cocultured with HIV-1 ⅢB infected MT-2 cells for 3 days. Finally, the HIV-1 production was determined by measuring the expression of reporter genes of TZM bl cells. The data were analyzed by MacSynergy Ⅱ software.Results:The average capacity of synergism/antagonism of JB25 with AZT, EFV and SQV was 244.45/-5.05(nmol/L)~2%, 119.58/-65.93 (nmol/L)~2% and 145.83/-0.32 (nmol/L)~2% respectively;the average capacity of synergism/antagonism of JB26 with AZT, EFV and SQV was 398.90/0(nmol/L)~2%, 103.62/-0.49(nmol/L)~2% and 138.473/-0.27 (nmol/L)~2% respectively. Conclusion:Two new NNRTIs JB25 and JB26 develop synergism when combined with 3 approved drugs, respectively. MacSynergy Ⅱ software could evaluate the anti-HIV-1 activity of drug combination.
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Objective To study the curative effects of surgical treatment of the severelv displaced supracondylar fracture of the humerus in children. Methods A retrospective investigation was conducted on 316 children with severely displaced supracondylar fracture of the humerus who had been treated with operation in our hospital from June 2001 to June 2006.There were 215 boys and 101 girls,with an average age of 7 years old(range,1 to 14).All were treated with open reduction and internal fixation by Kirschner wire,plaster external fixation after operation,and functional training 2 to 4 weeks postoperatively. Results All the 316 cases were followed up for over 6 months to 5 years, with an average of 2 yearS and 10 months. The functional recovery of the postoperative elbow joint was evaluated by Flynn's criteria.Of them,253 cases were rated as excellent,34 as good,25 as satisfactory,and 4 as poor.Cubitus varus deformity was found in 27 cases. Conclusions Although closed reduction and external fixation is the frst choice for the pediatric supracondylar fracture of the humerus, open reduction and Kirschner wire fixation is necessary for the severely displaced supracondylar fracture of the humerus,including those suffering from failed manipulative reduction,open fracture,vascular and neural injuries and limited function of the elbow joint. Anatomic reduction of broken ends,Kirschner wire internal fixation and early functional training are significant in the therapeutic efficacy of operation,and in the prevention or reduction of postoperative complications.
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<p><b>OBJECTIVE</b>To develop a chitosan (CH)/polyethylene glycols succinate acid (PEG-SA)-mediated mitomycin C (MMC) delivery system and investigate its drug release characteristics in vitro and its effect against scar tissue adhesion in vivo.</p><p><b>METHODS</b>Mitomycin C loading in the composite CH/PEG-SA/MMC films was determined using ultraviolet. The freeze-dried films were dispersed in 1 ml PBS (pH7.4) and mitomycin C release in vitro was determined according to the mitomycin C concentration-UV value standard curve. The influence of the film structure on the drug release was evaluated. The drug delivery system was then implanted in SD rats, and 4 weeks later, immunohistochemical and histological examinations were carried out to assess the therapeutic effect on epidural scar tissue.</p><p><b>RESULTS</b>The linear regression equation of the mitomycin C concentration-UV value standard curve was y=0.593x(3)-2.563x(2)+25.944x-0.236 (R(2)=1.000). The film demonstrated good drug delivery capability, and 20 mg of the samples in PBS showed a peak mitomycin C release after 12 days of 14.9616 microg/ml, which was higher than the ID(50) of mitomycin C (10.4713 microg/l) to the fibroblasts. On days 18 and 32, another two drug release peaks occurred (14.4824 microg/ml and 11.4092 microg/ml, respectively), followed by maintenance of slow release. Till day 60, the accumulative mitomycin release reached 0.1793 microg/ml, and the loaded drug was ultimately completely released. Significant differences were noted in the hydroxyproline content in the scar tissues of different groups (F=12.085, P=0.000), and the CH/PEG-SA/MMC DDS reduced the amount of scar tissue and promoted its orderly alignment to control potential scar hyperplasia that may compress the spinal cord and nerve roots.</p><p><b>CONCLUSION</b>The composite film for drug delivery possesses good flexibility and mechanical properties and allows sustained drug release of mitomycin C to prevent epidural scar tissue adhesion following lumbar laminectomy.</p>
Subject(s)
Animals , Rats , Chitosan , Chemistry , Drug Delivery Systems , Intervertebral Disc , General Surgery , Mitomycin , Chemistry , Polyethylene Glycols , Chemistry , Polyethylenes , Chemistry , Rats, Sprague-Dawley , Succinates , Chemistry , Tissue AdhesionsABSTRACT
Chronic post-hypoxic myoclonus, also known as Lance-Adams syndrome (LAS), is a rare complication of successful cardiopulmanry resuscitation often accompanied by action myoclonus and cerebellar ataxia. It is seen in patients who have undergone a cardiorespiratory arrest, regained consciousness afterwards, and then developed myoclonus days or weeks after the event. Worldwide, 122 cases have been reported in the literature so far, including 1 case of Chinese. Here we report 2 Chinese LAS patients with detailed neuroimagings. Cranial single photon emission computed tomography (SPECT) of patient 1, a 52-year-old woman, showed a mild hypoperfusion in her left temporal lobe, whereas patient 2, a 54-year-old woman, manifested a mild bilateral decrease of glucose metabolism in the frontal lobes and a mild to moderate decrease of the N-acetyl aspartate (NAA) peak in the bilateral hippocampi by cranial [(18)F]-fluorodeoxyglucose positron emission tomographic (PET) scan and cranial magnetic resonance spectroscopy (MRS), respectively. We also review the literature on the neuroimaging, pathogenesis, and treatment of LAS.
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Female , Humans , Middle Aged , Cardiopulmonary Resuscitation , Cerebellar Ataxia , Diagnosis , Hypoxia-Ischemia, Brain , Diagnosis , Myoclonus , Diagnosis , SyndromeABSTRACT
<p><b>OBJECTIVE</b>To study the chemical constituents possessing cytotoxicity activity from Elaeagnus pungens.</p><p><b>METHOD</b>The constituents were separated through repeated chromatographic methods and their structures were elucidated by spectral analysis.</p><p><b>RESULT</b>Five compounds were isolated from the ethyl acetate ether extract of leaves of E. pungens. Their structures were elucidated as 4-hydroxybenzoic acid (1), 3, 3'-dimethoxyquercetin (2), caffeic acid methyl ester (3), methyl 3, 4-dihydroxybenzoate (4), spingic acid (5), 4-methoxylbenzoic acid (6), 3-methylkaempferol (7), kaempferol-3-O-beta-D-glucoside (8), dausosterol (9).</p><p><b>CONCLUSION</b>Compounds 1-8 were isolated from this plant for the first time.</p>
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Humans , Caffeic Acids , Chemistry , Pharmacology , Cell Proliferation , Elaeagnaceae , Chemistry , HeLa Cells , Cell Biology , Kaempferols , Chemistry , Pharmacology , Parabens , Chemistry , Pharmacology , Plant Leaves , Chemistry , Plants, Medicinal , Chemistry , Quercetin , Chemistry , PharmacologyABSTRACT
0.8). (2) The range of correlation coefficient of increasing regions is from 0.7 to 0.98. Time-course graph shows that the figure of most curve is like “”. [Conclusion](1) The function of puncturing Baihui may be connected with signal changes of corresponding brain areas. (2) fMRI is a feasible method on studying the mechanisms of acupunctrue.
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<p><b>OBJECTIVE</b>To describe the characteristics of magnetic resonance (MR) signals generated by lipiodol and to assess the influence on MR imaging of hepatoma nodule.</p><p><b>METHODS</b>Pure lipiodol and lipiodol emulsions mixed with 76% urografin in different ratio were imaged by both CT and MR; quantitative T(1) and T(2) measurements of lipiodol were performed. Fourty-one SD rats with transplanted walker-256 sarcoma in liver were randomly divided into six groups: 0.4-0.6 ml lipiodol emulsion was infused via hepatic artery in experimental groups by means of laparotomy under celiac anesthesia. The changes in MRI signal of hepatoma nodule were observed.</p><p><b>RESULT</b>In vitro, iodized oil demonstrated high signal on T(1)-weighted images when performed at 37 degree, but all could be suppressed by the fat saturation sequence, and showed very low signal on T(2)-weighted images. The characteristic of MR signal with ultra fluid lipiodol was different from that of iodized oil (P<0.01), showing short T(1) and long T(2) signal; the high signal on T(1)-weighted images was only partially suppressed by the fat saturation sequence. With descending ratio of lipiodol in emulsion, the signal behavior was gradually similar to urografin (r -0.958, P<0.01). When rats were transarterially infused with emulsion, the intensity of the signal on MRI was nearly the same as that in the control rats, but when lipiodol was injected out of the hepatic artery and accumulated in lymphadenopathy, it demonstrated a signal similar to fat; the high intensity signal was maintained on T(1)-weighted images and T(2)-weighted images.</p><p><b>CONCLUSION</b>There are little changes in MR signal intensity when the lipiodol is accumulated in the tumor nodules. MR behavior of lipiodol is determined by its deposit area.</p>