3.To screen for SQSTM1/p62 gene in Chinese patients with familial amyotrophic lateral sclerosis carrying superoxide dismutase 1 mutation
Chinese Journal of Internal Medicine 2014;53(12):957-960
Objective To explore the clinical features and SQSTM1/p62 gene mutations in Chinese Han patients with familial amyotrophic lateral sclerosis linked superoxide dismutase 1 (SOD1) mutation (FALS-SOD1).Methods A total of 13 FALS-SOD1 probands and 100 healthy controls were studied,with DNA extracted from the peripheral blood.Sequencing was carried out at 8 exons,intron-exon boundaries and promoter region (2-kb upstream from the coding sequence) of SQSM1/p62.Clinical data were collected and all patients were followed-up.Phenotype-genotype relationship was analyzed.Results The insertion of T was found in intron 5 of SQSTM1/p62 gene [+ 1 insert T (TT > TG)] in a FALS-SOD1 G16A male proband,with limbs as the symptom onset and faster disease progression than the other two SOD1 G16A probands without SQSTM1/p62 gene mutation.Conclusions The insertion of T in the intron 5 of SQSTM1/ p62 gene may promote the ALS progression by damaging p62 function in the FALS-SOD1 G16A proband.
5.Expression of microRNA-29 b in mice with amyotrophic lateral sclerosis
Yi YANG ; Bin CAI ; Dongsheng FAN
Journal of Peking University(Health Sciences) 2015;(5):733-736
Objective:To investigate microRNA-29b ( miR-29b) expression in cerebral cortex , spinal cord, fore limb muscle, and serum of SOD1-G93A amyotrophic lateral sclerosis ( ALS) mice, and to identify the biomarker and to assess diagnostic values for ALS .Methods:Cerebral cortex , spinal cord , fore limb muscle and serum from 16 SOD1-G93 A ALS mice and 16 wild-type mice were taken and then microRNA extracted , detecting the expression of miR-29 b by real-time quantitative polymerase chain re-action ( RT-qPCR ) .The diagnostic performance of miR-29b for ALS was estimated by the receiver operating characteristic ( ROC ) curve . Results: The results from the validation indicated that the differences in miR-29b between the cerebral cortex of SOD1-G93A ALS and the healthy control subjects were statistically significant (P=0.001).Meanwhile, the expressions 8, 12, and 16 weeks later were higher than those of the controls ( ALS vs.Control: 8 weeks, P=0.044; 12 weeks, P=0.018; 16 weeks, P=0.045).When the relative expression level of miR-29b was used to diagnose ALS in SOD1-G93A ALS mice, the area under the ROC (area under the curve, AUC) was 0.885, if the diagnostic threshold was set at 0.185 6, the sensitivity and specificity were 92.9%and 71.4%.Conclusion:MiR-29 b may act as medical monitoring indices of ALS in early time .
6.Low Field MRI Diagnosis of Adenomyosis
Zisheng YI ; Yiping LIU ; Fan YANG
Journal of Practical Radiology 1992;0(11):-
Objective To investigate the diagnostic value of low field MRI for adenomyosis. Methods MRI features of adenomyosis pathologically proved in 18 cases were retrospectively analysed.Results 15 cases were diffusive adenomyosis,the junctional zones of uterus were exteusive thickened to 12.0~32.6 mm,mean 16.2 mm,diffusive high signal intensity distributed over in myometrium which was low signal intensity in 11 cases,it was typical “snowing sign”,lower signal intensity in the myometrium in another 4 cases on T 2WI and fat-suppression imaging. A little high signal intensity was found in 6 cases on T 1WI. 3 cases were focal adenomyosis(adenomyoma), 4 lesions totally. The adenomyoma’s boundaries were not distinct and their shapes were roundish or irregular. The lesions were low signal intensity or diffusive high signal intensity distributed in the low signal intensity fields on T 2WI and fat-suppression imaging. A little high signal intensity was found in 2 lesions on T 1WI. Conclusion T 2WI and fat-suppression imaging of low field MRI are very useful techniques of the diagnosis of adenomyosis.
7.Study of 34 cases with lung nodules SPECT-CT imaging with 99m Tc-MIBI
Lei YANG ; Weihong YUAN ; Yi ZHANG ; Jianxian YANG ; Fan YANG
Journal of Chinese Physician 2011;(z1):1-3
Objective To evaluate the value of the fusion of 99m Tc-MIBI imaging technology apply in the diagnosis of malignant lung tumor. Methods Thirty - four cases with lung nodules proved by X-ray and/or CT scanning, a total of 48 lung nodular lesions. And the imaging with-99m Tc-MIBI of chest performed at 10 minutes and 2 hours delayed after injection by GE Infinia Hawkeye 4 SPECT-CT. then the regions of interesting ( ROI) were drawn in the tumor and contra lateral position to calculate the radioactivity ratios of tumor to normal ( T/NT) , and fused with the spiral CT scanning image in the same machine, and reading the early and delayed image respectively. Judged the result of the image develops, and statistical analysis of the ratio (T/NT) according to the final pathologic consequence. Results All cases with total of 48 nodular lesions, 21 nodules were positive in early imaging, 16 nodules were positive in delayed imaging (the ratio T/NT over 3. 33). defined the delayed image positive as the final criterion, The(T/NT)ratios of Malignant lung lesions were significantly higher than the benign lesions ( P <0. 05). Negative nodes 27, 13 cases of lung cancer lesions were malignant, confirmed by postoperative pathologic examination. The falsepositive nodules 3, false-negative nodules 2. The sensitivity was: 88.88%, the specificity was: 90.9% positive predictive value ( +PV) was: 84. 21% , negative predictive value (-PV) is: 93.75%. Conclusion 99mTc-MIBI as a tumor positive imaging agent is highly sensitivity to lung lesions, but specificity is not so high.
8.Relation between drug release and the drug status within curcumin-loaded microsphere.
De CHEN ; Yi LIU ; Kai-yan FAN ; Yi-qiao XIE ; An-an YU ; Zi-hua XIA ; Fan YANG
Acta Pharmaceutica Sinica 2016;51(1):140-146
To study the relation between drug release and the drug status within curcumin-loaded microsphere, SPG (shirasu porous glass) membrane emulsification was used to prepare the curcumin-PLGA (polylactic-co-glycolic acid) microspheres with three levels of drug loading respectively, and the in vitro release was studied with high-performance liquid chromatography (HPLC). The morphology of microspheres was observed with scanning electron microscopy (SEM), and the drug status was studied with X-ray diffraction (XRD), differential scanning calorimetry (DSC) and infrared analysis (IR). The drug loading of microspheres was (5.85 ± 0.21)%, (11.71 ± 0.39)%, (15.41 ± 0.40)%, respectively. No chemical connection was found between curcumin and PLGA. According to the results of XRD, curcumin dispersed in PLGA as amorphous form within the microspheres of the lowest drug loading, while (2.12 ± 0.64)% and (5.66 ± 0.07)% curcumin crystals was detected in the other two kinds of microspheres, respectively, indicating that the drug status was different within three kinds of microspheres. In the data analysis, we found that PLGA had a limited capacity of dissolving curcumin. When the drug loading exceeded the limit, the excess curcumin would exist in the form of crystals in microspheres independently. Meanwhile, this factor contributes to the difference in drug release behavior of the three groups of microspheres.
Calorimetry, Differential Scanning
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Curcumin
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chemistry
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Drug Liberation
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Lactic Acid
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Microscopy, Electron, Scanning
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Microspheres
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Polyglycolic Acid
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X-Ray Diffraction
10.Changes and clinical significance of CGRP and IL-1 αbefore and after warm acupuncture therapy in patients with lumbar disc herniation
Xinguo FENG ; Xiaobin LI ; Jianliang YI ; Fan YANG ; Xiaomin LIU
International Journal of Laboratory Medicine 2014;(5):521-522
Objective To investigate the changes and clinical significance of calcitonin gene related peptide (CGRP) and interleu-kin 1α(IL-1α) before and after warm acupuncture therapy in the patients with lumbar disc herniation (LDH ) .Methods Serum CGRP and IL-1αcontents were detected before and after the warm acupuncture therapy in 60 cases of lumbar disc herniation and 15 healthy control cases by ELISA method for conducting the statistical analysis .The changes of the McGill pain scores and serum CGRP and IL-1αconcentrations before and after the warm acupuncture therapy were observed .Results The McGill pain scores af-ter the warm acupuncture therapy in the LDH patients were significantly decreased ,the difference was statistically significant (P<0 .01) ,and serum CGRP and IL-1α concentrations were significantly decreased ,the difference was statistically significant (P<0 .01) .Conclusion CGRP and IL-1αcan be used as the observation index of the effects for the warm acupuncture therapy in trea-ting LDH ,which can provide the basis for the conservative treatment of LDH .