1.The study of selective water excitation in the MR imaging of articular cartilage
Fei GU ; Xue-Zhe ZHANG ;
Chinese Journal of Radiology 2000;0(12):-
Objective To investigate the value of selective water excitation technique for the assessment of articular cartilage.Methods MR sagittal scanning of knee joints was performed in the fifteen healthy volunteers.MR scan sequences were 3D-FFE-SPIR and 3D-FFE-WATS.The signal noise ratio (SNR)of the cartilage,the contrast noise ratio(CNR)between cartilage and adjacent tissue and their efficiency were calculated and analyzed statistically.Tweenty-nine patients who were suspected having cartilage injury were performed MR examination anti the image characteristics and the detecting ability of each sequence on cartilage lesions were analyzed.Results In the healthy volunteers,the cartilage SNR was 3D-FFE-SPIR:197.93?18.58,3D-FFE-WATS:187.32?21.50(P=0.159).CNR(cartilage/bone)was 3D-FFE-SPIR:185.50?18.34,3D-FFE-WATS:169.55?24.57(P=0.054).CNR(cartilage/muscle)was 3D-FFE-SPIR:61.40?19.04,3D-FFE-WATS:47.27?21.05(P=0.064).The cartilage SNR and CNR between cartilage and bone,muscle of 3D-FFE-SPIR weren't significantly higher than that of 3D-FFE- WATS.CNR(cartilage/liquid)was 3D-FFE-SPIR:91.53?14.46,3D-FFE-WATS:149.28?32.30(P= 0.000).CNR(cartilage/marrow)was 3D-FFE-SPIR:159.26?18.83,3D-FFE-WATS:176.87? 22.50(P=0.028).CNR(cartilage/fat)was 3 D-FFE-SPIR:134.56?15.80,3D-FFE-WATS:154.01? 22.42(P =0.010).The CNR between cartilage and liquid,marrow,fat were higher in 3D-FFE-WATS and significantly different than that of 3D-FFE-SPIR.Thirty detected cartilage injuries of patients were 3D-FFE- WATS:39,3D-FFE-SPIR:45 and there was no statistical difference between them(P=0.37). Conclusion 3D-FFE-WATS can show the articular cartilage clearly.It has high scan speed and suppress the fat signal evenly.Its ability for finding cartilage damage is equal to that of 3D-FFE-SPIR.So WATS can be used in the routine clinical cartilage examination.
2.Significance of urine neutrophil gelatinase associated lipocalin and kidney injure molecule-1 in patients with primary nephropathy syndrome with acute kidney injury
Shaomei LI ; Wen XUE ; Wenlong WEN ; Liping ZHANG ; Chunxia ZHANG ; Zhe YAN ; Jianzhao DUAN
Clinical Medicine of China 2013;29(12):1287-1290
Objective To investigate the significance of neutrophil gelatinase associated lipocalin (NGAL) and kidney injury molecule-1 (KIM-1) in the patients of primary nephmpathy syndrome (PNS) complicated with acute kidney injury (AKI) by detecting urinary level of NGAL and KIM-1.Methods Senventy-two patients of PNS were selected as our subjects including 34 case with minimal change disease (MCD),23 cases with membranous nephropathy(MN),15 cases with mesangial proliferative glomerulonephritis (MsPGN).Fifteen cases of healthy physical examination were selected as control group.Meanwhile subjects were also divided into PNS with ATN group (15 cases) and PNS without ATN group (57 cases) according to their pathology check.ELISA was applied to detect the urinary level of NGAL and KIM-1,whose correlation with pathological type and clinical index were analyzed.Results The urinary level of NGAL and KIM-1 in patients with PNS were (42.37 ± 28.24) μg/L,(2.76 ± 1.11) μg/L respectively,higher than that of control group (P <0.01).The urinary level of NGAL in the MCD group,MN group,MsPGN group were higher than that of control group (46.81 ± 15.75) μg/L,(22.09 ± 7.69) μg/L,(15.31 ± 3.74) μg/L,(8.03 ± 0.35) μg/L respectively,P < 0.05).The urinary level of NGAL in MCD group was significantly highest than that in the other groups (P < 0.05).The urinary level of KIM-1 in the MCD group,MN group,MsPGN group were higher than that of control group(2.41 ±0.58) μg/L,(2.54 ±0.67) μg/L,(2.87 ±0.50) μg/L,(0.73 ±0.35) μg/L respectively,P <0.05).But there was no significant difference among MCD,MN,MsPGN groups(P > 0.05).The urinary level of NGAL and KIM-1 in patients PNS were (42.37 ± 28.34) μg/L and (2.76 ± 1.11) μg/L,significantly higher than that of control group (t =4.668,12.665,P < 0.05).The urinary level of NGAL and KIM-1 in patients PNS with ATN were significantly higher than patient without ATN (NGAL:(74.98 ±9.52) μg/L vs.(31.31 ±2.34) μg/L;KIM-1:(3.60 ±0.92) μg/L vs.(2.54 ±0.81) μg/L,P <0.05).The correlation analysis showed that the urinary level of NGAL and KIM-1 was positively correlated with serum β2-MG,serum creatinine,serum blood urea nitrogen and 24-hour urine protein.(r =0.432,0.299,0.234,0.254,0.434,0.650,0.276,0.301 respectively,P < 0.05).Conclusion The urinary level of NGAL and KIM-1 could be considered as the early,non-invasive biologic factors to reflect in patients of PNS with ATN.
3.Adiponectin attenuates H2 O2-induced SH-SY5 Y cell injury and tau hyper-phosphorylation via activating PP2 A
Zhe SONG ; Chao XUE ; Xiaoman ZHANG ; Yemin ZHANG ; Xiaohua HE ; Jun YIN
Chinese Journal of Pathophysiology 2015;(2):207-212
AIM:To study the effects of adiponectin on H 2 O2-induced cell injury and tau hyperphosphorylation in human neuroblastoma SH-SY5Y cells.METHODS:Cell viability was determined by MTT assay .H2 O2-induced cell in-jury and morphological changes in the SH-SY5Y cells with or without adiponectin treatment were observed .The level of tau phosphorylation as well as the activities of protein phosphatase 2A (PP2A) and of glycogen synthase kinase-3β(GSK-3β) were examined by Western blotting . RESULTS: Adiponectin significantly attenuated H 2 O2-induced cell injury (P<0.01).Adiponectin upregulated the activity of PP2A and decreased phosphorylation levels of tau under the stimula-tion with H2O2(P<0.01).Okadaic acid, a specific inhibitor of PP2A, blocked the protective effects of adiponectin (P<0.01).Adiponectin increased the phosphorylation level of GSK-3βat Ser9 site under H2O2stimulation (P<0.01).CON-CLUSION:Adiponectin protects SH-SY5Y cells against H2O2-induced cell injury and decreases tau hyperphosphorylation by activating PP2A and inactivating GSK-3β.
4.Function of single channel electrocardiograph is expanded in community medical service.
Xue-hao ZHANG ; Yan-zhe LU ; Wei ZHANG
Chinese Journal of Medical Instrumentation 2002;26(5):335-338
The paper introduces a designing idea and a carrying-out scheme about expanding functions of single channel electrocardiograph in Chinese community medical service and looks forward to its applying prospects.
Community Health Services
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Electricity
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Electrocardiography, Ambulatory
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instrumentation
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Equipment Design
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Humans
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Microcomputers
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Signal Processing, Computer-Assisted
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Software
5.Piwi-interacting RNA(piRNA):a Novel Class of Noncoding Small RNA
Xue-Mei HUANG ; Shou-Tao ZHANG ; Fang WANG ; Wei LIU ; Yi-Zhe ZHANG ;
China Biotechnology 2006;0(08):-
piRNA(Piwi-interacting RNA) is a novel class of small single strand RNA that were recently isolated from testes of the mammals, associate with PIWI proteins, and are organized into distinct genomic clusters. These RNAs are typically 30 nt long, strikingly different from microRNAs in their length, expression pattern, and genomic organization. piRNA has a role in RNA silencing via the formation of an RNA-induced silencing complex (RISC) with Piwi proteins, these piRNA complexes (piRCs) have been linked to transcriptional gene silencing of retrotransposons and other genetic elements in germ line cells, particularly those in spermatogenesis.Recent researches and progresses of piRNAs are reviewed.
6.CT-guided percutaneous biopsy of musculoskeletal lesions
Xue-Bin ZHANG ; Xue-Zhe ZHANG ; Yan-Ning SHANG ; Zhen-Guo HUANG ; Wu WANG ; Wen HONG ; An REN ;
Chinese Journal of Radiology 2001;0(02):-
3 cm)and small lesions(diameter≤3 cm)were 80.6%(79/98)and 67.2% (45/67),respectively(P
7.Gene polymorphism of tumor necrosis factor-?affecting severity of myocardial damage during cardiopulmonary bypass
Zhe ZHANG ; Ying-Bin XIAO ; Lin CHEN ; Xue-Feng WANG ; Qian-Jin ZHONG ;
Chinese Journal of Trauma 2003;0(09):-
Objective To investigate the effect of polymorphism of TNF-?gene G308A on sever- ity of myocardial damage during cardiopulmonary bypass(CPB).Methods Sixty-three congenital ca- ses with ventrieualr septal defect(VSD)were divided into groups TNF1 and TNF2 after TNF-?gene pol- ymorphism was identified by polymerase chain reaction-restriction fragment length polymorphism(PCR- RFLP)before surgery.When the right atrium was opened and closed,specimens of myocardium were ob- tained to study the ultrastructural changes by electron microscope and determine expression of TNF-?mR- NA.Concentration of TNF-?in plasma was measured by radio-immunity after anesthetic induction(T1), 20 minutes of CPB(T2),at the end of CPB(T3) and six hours after CPB(T4)in all cases,respective- ly.Results (1)TNF-?level and the expression of TNF-?mRNA in myocardium were significantly increased during CPB(P<0.05)in both groups.(2)TNF-?mRNA level of group TNF2 was significant- ly higher than that of group TNF1(P<0.05).The myocardial CK-MB in group TNF2 was significantly higher than that in group TNF1 at 24 hours postoperatively(P<0.01).The electron microscope showed more severe ultrastructural changes of myocardium in TNF2 group compared with that in group TNF1(P<0.05).(3)The concentration of TNF-?in blood plasma in group TNF2 was significantly higher than that in group TNF1 at time points of T2-T4(P<0.05).Conclusion Polymorphism of TNF-?gene G308A may influence the transcription and production of TNF-?in vivo and hence affect severity of myo- cardial damage.
8.Analysis of impact factors of serum N-terminal pro-brain natriuretic peptide in patients with renal failure in non-dialysis phase
Liying WEN ; Shaomei LI ; Sumin JIAO ; Zhe YAN ; Chunxia ZHANG ; Lingling XING ; Wen XUE ; Shuxia FU
Chinese Journal of Nephrology 2016;32(10):745-752
Objective To analyze the impac factors of serum N?terminal pro?brain natriuretic peptide (NT?proBNP) in patients with renal failure in non?dialysis phase, and to determine the cut?off point of as a diagnostic values in these patients with heart failure (HF). Methods Cross?sectional study was applied. Clinical data of 145 patients (37 cases of CKD4, 89 cases of CKD5, and 19 cases of acute renal injury (AKI) with renal failure in non?dialysis phase were collected. Comparison between groups and lineal regression analysis were utilized to investigate the impact factors of NT?proBNP, and the receiver operating characteristic curve (ROC curve) to select a better cut?off point of diagnosis in these patients with HF. Results (1) Compared with patients without HF, patients with HF had significantly higher edema, cardiac troponin I, serum phosphorus concentration, and left atrial diameter (LA), while ALB and left ventricular ejection fraction (LVEF) were decreased (P<0.05). (2) The NT?proBNP was divided into 4 groups with four points: First groups of 36 cases, NT?proBNP 1 ?862 ng/L, second groups 37 cases, 866?2670 ng/L, third groups 37 cases, 2790?20 000 ng/L, fourth groups 35 cases, 20 900?35 000 ng/L. With the increase of NT?proBNP levels, the occurrence of AKI and CKD4 decreased gradually while the occurrence of CKD and edema were significantly increased (P<0.01). Systolic blood pressure, troponin I, uric acid, serum phosphorus, parathyroid hormone, 24 hours urine protein, LA, interventricular septum thickness (IVS), left ventricular posterior wall thickness (LVPW) level gradually increased. Hb, ALB, calcium, CO2, eGFR, LVEF significantly decreased (P<0.01). The serum NT?proBNP of patients with HF was significantly higher than that of patients without HF (19 150 ng/L vs 1530 ng/L, P<0.01). The serum NT?proBNP of patients with edema was significantly higher than that in patients without edema (5460 ng/L vs 1630 ng/L, P<0.01). (3) Single factor linear regression analysis indicated that higher NT?proBNP was positive correlated with HF, edema, cardiac troponin I, uric acid, serum phosphorus, LA, IVS and LVPW (P<0.05), while negative correlated with Hb, eGFR, ALB, serum calcium, CO2, LVEF (P<0.05), and not correlated with eGFR, uric acid, serum calcium (P>0.05). (4) The best cut?off point of NT?proBNP predicting HF in patients with renal failure in non?dialysis phase was 3805 ng/L, AUC=0.848, 95%CI 0.786?0.910. Sensitivity was 82.4%, specificity 74.5%, positive predictive value 62.1%, negative predictive value 87.3%, positive likelihood ratio 3.2, negative likelihood ratio 0.24. Conclusions The level of NT?proBNP>20 000 ng/L is mainly found in end?stage renal disease patients with HF. HF is a main factor for the increase of NT?proBNP in patients with renal failure in non?dialysis phase. High phosphorus viremia, anemia, and hypoalbuminemia are closely related to NT?proBNP. Therefore NT?proBNP predicting HF should take into account the effects of these confounding factors in these patients.
9.Changes of Thyroid Hormone in Children with Attention Dificit Hyperactivity Disorder and Its Significance
li-ping, FAN ; zhe-dong, WANG ; hai-ping, LU ; xue-lan, ZHANG
Journal of Applied Clinical Pediatrics 2006;0(20):-
0.05).Conclusion FT3 ,T3 play some potentially roles in the pathogenesis of ADHD and TSH may not be related to it.
10.Toxicological pathology in preclinical drug safety evaluation
Zhi LIN ; Jianjun LV ; Guitao HUO ; Di ZHANG ; Yanwei YANG ; Shuo ZHANG ; Xue WANG ; Bo LI ; Zhe QU
Drug Evaluation Research 2017;40(4):450-454
Toxicological pathology is a morphological elucidatet ion of tissue damage caused by drug toxicity,including damage type,location,severity grade and prognosis.It provides objective and accurate data to support preclinical drug safety evaluation.Therefore,toxicological pathology plays an important role in drug safety evaluation,and the pathologic data or conclusion often determines the termination or continuation in many drug development projects.In this paper,the characteristic of toxicological pathology,standardized management,the development of new techniques including in situ hybridization,laser scanning cytometry and laser capture microdissection,and related problems in pathology are discussed briefly.