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1.
Chinese Journal of Contemporary Pediatrics ; (12): 1234-1238, 2023.
Article in Chinese | WPRIM | ID: wpr-1009874

ABSTRACT

Kawasaki disease (KD) is a systemic inflammatory vascular disorder that predominantly affects children and is the leading cause of acquired heart disease in children. Although the etiology of this disease remains unclear, genome-wide association and genome-wide linkage studies have shown that some susceptible genes and chromosomal regions are associated with the development and progression of KD. With the advancement of high-throughput DNA sequencing techniques, more and more genomic information related to KD is being discovered. Understanding the genes involved in the pathogenesis of KD may provide novel insights into the diagnosis and treatment of KD. By analyzing related articles and summarizing related research advances, this article mainly discusses the T cell activation-enhancing genes that have been confirmed to be closely associated with the development and progression of KD and reveals their association with the pathogenesis of KD and coronary artery lesions.


Subject(s)
Child , Humans , Mucocutaneous Lymph Node Syndrome/complications , Genome-Wide Association Study , Genetic Predisposition to Disease , Polymorphism, Genetic , Coronary Vessels/pathology , Polymorphism, Single Nucleotide
2.
Chinese Journal of Biochemistry and Molecular Biology ; (12): 289-299, 2021.
Article in Chinese | WPRIM | ID: wpr-1015965

ABSTRACT

Parkin, also known as PARK2, has been closely related to Parkinson's disease (PD) since its discovery. It is considered to be a neuroprotective gene. With the in-depth understanding for its structure, Parkin has been unveiled as an E3 ubiquitin ligase. Parkin is involved in the regulation of cell cycle, mitochondrial homeostasis, energy metabolism and other cellular processes, and is closely related to many diseases. It even plays completely opposite roles in the same pathway, namely cell proliferation and apoptosis, indicating that this must be a gene with an extremely broad and important role. This article summarizes the discovery and structure of Parkin and its self-inhibiting characteristics, focusing on the ubiquitination process that it participates in as E3 ubiquitin ligase and the resulting autophagy, protein degradation, changes in protein subcellular localization and protein interaction. These may all serve as the basis for Parkin to prevent PD and suppress tumors. On this basis, two reasons for Parkin abnormalities leading to PD are summarized: abnormal protein quality control and mitochondrial dysfunction, and extended to cardiovascular and kidney diseases caused by the abnormality of Parkin due to mitochondrial dysfunction. The internal connection between Parkin and cancer is also introduced from the aspects of Parkin as a tumor suppressor, regulating cell cycle, apoptosis and metastasis, oxidative stress and energy metabolism. By maintaining the active state of Parkin or enhancing its expression, it may be possible to improve the condition of PD patients. But the mechanism of Parkin's inhibition of tumor growth remains to be deciphered, and the potential role of Parkin in mediating the relationship between PD and cancer risk should be strengthened. These follow-up in-depth studies and their role in the diagnosis and treatment of related diseases and application of target molecules laid the foundation.

3.
Chinese Journal of Nephrology ; (12): 666-674, 2020.
Article in Chinese | WPRIM | ID: wpr-870998

ABSTRACT

Objective:To evaluate the prevalence of masked hypertension defined by home blood pressure monitoring in patients on peritoneal dialysis (PD) and examine its determinants.Methods:The patients who performed PD in the First Affiliated Hospital of Sun Yat-sen University from January 1, 2006 to December 31, 2013 were recruited. Baseline demographic, clinical and biochemical examination data were collected to analyze the prevalence and clinical characteristics in patients with masked hypertension defined by home blood pressure monitoring. Multivariate logistic regression model was used to analyze the related risk factors of masked hypertension in PD patients with clinic normotension.Results:There were 1 425 patients (866 males) enrolled in this study, with age of (46.9±14.9) years and body mass index of (21.6±3.1) kg/m 2. The prevalence of masked hypertension in PD patients was 31.9%, and the prevalence of masked hypertension in patients with clinic normotension was 57.5%. Multivariate logistic regression analysis showed that higher body mass index ( OR=1.057, 95% CI 1.001-1.116, P=0.047), incorporating diabetes mellitus ( OR=1.996, 95% CI 1.160-3.433, P=0.013), use of multiple antihypertensive drugs ( OR=1.336, 95% CI 1.122-1.590, P=0.001) and elevated office blood pressure ( OR=1.785, 95% CI 1.546-2.060, P<0.001) were independent risk factors of masked hypertension in PD patients with clinic normotension. Conclusions:The prevalence of masked hypertension is high in PD patients. Higher body mass index, incorporating diabetes mellitus, use of multiple antihypertensive drugs and elevated office blood pressure are independent risk factors for masked hypertension in PD patients with clinic normotension.

4.
Chinese Journal of Cardiology ; (12): 682-688, 2020.
Article in Chinese | WPRIM | ID: wpr-941158

ABSTRACT

Objective: To investigate the protective role of alprostadil on aortic dissection. Methods: 26 C57BL6 male mice were divided into control group (normal drinking water, n=13) and model group (1 g·kg-1·d-1 BAPN via drinking water, n=13). On day 14, mRNA expression of inflammatory-related genes as well as EP receptor families were detected by RT-PCR (n=6 each) and EP4 protein levels were determined by Western blot (n=7 each). Another 88 mice were divided into 3 groups: control group (n=22), model group (n=33) and treatment group (n=33). The mice in model group and treatment group were applied with BAPN (1 g·kg-1·d-1) via drinking water. The mice in treatment group received additional intraperitoneal injection with alprostadil (80 μg·kg-1·d-1) for 28 days. The mice in the control and model group received equal volume intraperitoneal injection with 0.9% saline respectively. The body weight and systolic blood pressure, the mortality and morbidity were monitored from the beginning until the designed end of the study. On day 28, the mice were sacrificed and aorta were fixed, embedded and sliced, followed by staining with HE and Victoria Blue. The distribution of EP4 was determined by immunohistochemistry in control (n=6) and model group (n=6). Furthermore, the concentration of PGE1 were tested among model (n=3) and treatment group (n=4). EP4 protein expression was determined in model group (n=7) and treatment group (n=6). Results: On day 14, mRNA expression level of MCP-1 ((2.74±1.55) vs. (1.00±0.49),<0.05) and MMP2((1.38±0.42) vs. (1.00±0.27), P<0.05) was significantly upregulated in model group compared with control group. Protein expression of EP4 receptor also increased in aorta in model group compared with control group (1.48±0.51 vs. 1.00±0.19, P<0.05). In the dissection area, the EP4 expression was also enriched compared with non-dissection area, particularly in endothelial cells and inflammatory cells on day 28. BAPN applied in drinking water (model and treatment groups) successfully induced the aortic dissection in mice, some mice died of the rupture. The elastic fibers were fractured, and the infiltrated immune cells were visible in dissected tissue. False lumen was formed. There was no dissection and death in the control group. Compared with control group, the morbidity and mortality rates were significantly increased in the model group (60.6%, 20/33, 30.3%, 10/33) and the treatment group (72.7%, 24/33, 24.2%, 8/33). The mortality and morbidity rates were similar between model and treatment groups. There is no difference in terms of SBP among three groups (P>0.05). Further study showed that after alprostadil injection, the blood concentration of PGE1 was increased in treatment group ((0.540±0.041 vs. 0.436±0.012)μmol/L, P<0.05). Besides, the EP4 receptor expression was downregulated in the treatment group compared to model group (0.60±0.30 vs. 1.00±0.20, P<0.05). Conclusion: EP4 expression is upregulated in BAPN induced aortic dissection mouse model. No protective effects are observed post alprostadil treatment in this model probably due to the reduced expression of EP4.


Subject(s)
Animals , Male , Mice , Alprostadil , Aminopropionitrile , Aortic Dissection , Disease Models, Animal , Endothelial Cells
5.
Journal of Xi'an Jiaotong University(Medical Sciences) ; (6): 653-657, 2019.
Article in Chinese | WPRIM | ID: wpr-844011

ABSTRACT

Objective: To observe the effects of Tanshinone ⅡA on the growth of HT29 and the expressions of TGF-β1 and Bcl-2 in colon cancer so as to provide theoretical assistance for treatment of colon cancer. Methods: Human colon cancer HT29 cells were cultured for different time after treated with various concentrations of Tanshinone ⅡA, respectively. MTT method was used to detect cell growth. The human colon cancer tumors on nude mice were randomly divided into control group and Tanshinone ⅡA treatment group, and the tumor volume was measured once a week. After 4 weeks, the tumors were preserved. The levels of TGF-β1 and Bcl-2 protein in the HT29 cells and tumor tissues were detected by Western blot. Results: With the increase of Tanshinone ⅡA concentration, the growth inhibition rate of HT29 increased; Tanshinone ⅡA downregulated the mRNA and protein levels of TGF-β1 and Bcl-2 gene in HT29. The volume inhibition rate of Tanshinone ⅡA on mouse colon cancer transplanted tumor was 28.63%. The results of Western blot showed that the levels of TGF-β1 and Bcl-2 protein were decreased in Tanshinone ⅡA group compared with control group. Conclusion: Tanshinone ⅡA has significant inhibitory effects on the growth of colon cancer cell HT29 and its xenografts model. This mechanism may be realized by the downregulation of TGF-β1 and Bcl-2 expressions via Tanshinone ⅡA.

6.
Chinese Journal of Nephrology ; (12): 822-827, 2019.
Article in Chinese | WPRIM | ID: wpr-801318

ABSTRACT

Objective@#To explore the clinicopathological features and the renal biopsy process of a case of IgG4-related chronic interstitial nephritis with perirenal capsule involved and review associated literature to improve the clinician's understanding for this disease and to perform a better renal biopsy.@*Methods@#The onset, diagnosis and treatment course of the disease were described and associated literature were reviewed to summary the clinicopathologic features and key points in renal biopsy.@*Results@#The data of the patient showed that the urine specific gravity was 1.011, with urine protein ± and urine sugar 3+. The concentration of hemoglobin was 53 g/L, serum creatinine was 1665 μmol/L, and IgG4 was 9.39 g/L. Computed tomography showed that both kidneys enlarged slightly with decreased density and low density shadow around the kidneys. On contrast-enhanced scan, irregular low-density enhancement areas were found in both kidneys, and the edge of the boundary was not clear. For the first renal biopsy, no renal parenchyma was found except mainly hyaline collagen fibrils. At the second time, 3 pieces of tissues were obtained, which showed chronic interstitial glomerulonephritis. The IgG4 positive plasma cells were about 60/HPF and the IgG4+/IgG+cells ratio was more than 40%. The diagnosis of IgG4-related chronic interstitial glomerulonephritis was confirmed. After corticosteroid treatment, the serum creatinine decreased to 502 μmol/L after the patient got rid of dialysis.@*Conclusions@#There are various manifestations of renal damage caused by IgG4-related disease. It is necessary to pay attention to the involvement of the perirenal capsule, and to balance the risk of bleeding and poor sampling in renal biopsy.

7.
Chinese Journal of Endocrinology and Metabolism ; (12): 136-140, 2018.
Article in Chinese | WPRIM | ID: wpr-709919

ABSTRACT

Objective To compare ultra-performance liquid chromatography tandem mass spectrometry (UPLC-MS/MS) and chemiluminescence immunoassay(CLIA) measurement of human serum androgen levels in polycystic ovarian syndrome(PCOS). Methods 160 PCOS patients and 146 healthy subjects(control group) were recruited and their serum androgen levels——measurements of testosterone and dehydcoepiandrosterone sulfate (DHEA-S) were tested by UPLC-MS/MS and CLIA. The androgen results combined with body mass index(BMI) were analyzed by ROC curve. According to area under curve(AUC) calculated by SPSS, a better method will be selected to provide accurate test results for physicians. Results (1)AUC of DHEA-S tested by UPLC-MS/MS was significantly higher than the one tested by CLIA(P<0.01). There was no significant difference between the AUC of T tested by UPLC-MS/MS and the one tested by CLIA. (2)AUC of T combined with DHEA-S tested by HPLC was not only significantly higher than the AUC of two combined indicators tested by CLIA(P<0.01),but also significantly higher than the AUC of a single indicator——either T(P<0.01) or DHEA-S(P<0.01) tested by UPLC-MS/MS. (3)The AUC of T,DHEA-S combined with BMI tested by HPLC was not only significantly higher than the AUC of three combined indicators tested by CLIA(P<0.01),but also higher than the AUC of two combined indicators tested by UPLC-MS/MS(P<0.05). Conclusion T and DHEA-S tested by UPLC-MS/MS combined with BMI has a certain reference value in the diagnosis of PCOS.

8.
Journal of Gynecologic Oncology ; : e51-2018.
Article in English | WPRIM | ID: wpr-716099

ABSTRACT

No abstract available.


Subject(s)
Drug Therapy , Ovarian Neoplasms
9.
Frontiers of Medicine ; (4): 542-549, 2018.
Article in English | WPRIM | ID: wpr-772718

ABSTRACT

Preeclampsia (PE) is a pregnancy-specific, multi-system disorder and the leading cause of maternal and perinatal morbidity and mortality in obstetrics worldwide. Excessive vasoconstriction and dysregulated coagulation function are closely associated with PE. Heat shock protein 20 (HSP20) is ubiquitously expressed under normal physiological conditions and has important roles in vascular dilatation and suppression of platelet aggregation. However, the role of HSP20 in the pathogenesis of PE remains unclear. In this study, we collected chorionic plate resistance arteries (CPAs) and serum from 118 healthy pregnant women and 80 women with PE and detected the levels of HSP20 and its phosphorylated form. Both HSP20 and phosphorylated HSP20 were downregulated in CPAs from women with PE. Comparison of the vasodilative ability of CPAs from the two groups showed impaired relaxation responses to acetyl choline in preeclamptic vessels. In addition to the reduced HSP20 in serum from women with PE, the platelet distribution width and mean platelet volume were also decreased, and the activated partial thromboplastin time and thromboplastin time were elevated.With regard to the vital roles of HSP20 in mediating vasorelaxation and coagulation function, the decreased HSP20 might contribute to the pathogenesis of PE.


Subject(s)
Adult , Female , Humans , Pregnancy , Case-Control Studies , Chorion , HSP20 Heat-Shock Proteins , Metabolism , Phosphorylation , Placenta , Platelet Function Tests , Pre-Eclampsia , Metabolism , Vasoconstriction , Vasodilation
10.
Tianjin Medical Journal ; (12): 959-962, 2018.
Article in Chinese | WPRIM | ID: wpr-815561

ABSTRACT

@#Objective To investigate the relationship between subclinical hypothyroidism (SCH) and visceral adipose tissue. Methods A total of 68 SCH subjects from medical examination center and inpatient department of our hospital and 100 healthy controls matched for age and sex were enrolled in this study. The patient gender, blood pressure (SBP/DBP), anthropometric measurements, lipid profile, lipid accumulation product (LAP) and visceral adipose area (VA) were compared between two groups. The Sperman’s correlation was used to analyze the correlation between thyroid stimulating hormone (TSH) and variables, and the Binary logistic regression analysis was used to analyze the impact of variables on SCH. Results The waist circumference (WC), waist to hip ratio (WHR), non high density lipoprotein cholesterol (nonHDL-C), three acylglycerol (TG), TSH, LAP and VA were higher in SCH subjects than that in the healthy controls (P<0.05), while HDL-C was lower in SCH subjects (P<0.05). There were no significant differences in sex, age, body mass index (BMI), SBP, DBP, total cholesterol (TC) and low density lipoprotein cholesterol (LDL-C) between two groups (P<0.05). Correlation analysis showed that TSH was positively correlated with WC, TG, nonHDL-C, LAP and VA, and negatively correlated with HDL-C (P<0.05). There was no significant correlation between TSH and age, BMI, WHR, TC and LDL-C (P> 0.05). Binary logistic regression analysis showed that female and low level of HDL-C were risk factors of SCH, while the effects of VA and LAP on SCH were not statistically significant. Conclusion Our findings show that the dyslipidemia and VA increase are more serious in subjects with SCH than those with normal thyroid function and healthy controls, which suggest that SCH is closely related to abdominal obesity.

11.
Chinese Circulation Journal ; (12): 567-571, 2018.
Article in Chinese | WPRIM | ID: wpr-703897

ABSTRACT

Objectives:To observe the detection rate of coronary artery disease (CAD) by coronary computer tomography angiography (CCTA) in young patients with suspected CAD, and to explore the imaging features and related risk factors of CAD. Methods:Data from 2 099 patients aged≤45 years who underwent CCTA in our hospital due to suspected CAD were retrospectively obtained. The risk factors of CAD in this patient cohort were analyzed, detection rate and imaging features of CAD among≤20, 21~30, 31~40 and 41~45 years subgroups were compared. Presence or absence of coronary plaque, plaque nature and stenosis degree were recorded. Results:CAD was detected in 229(10.9%) out of 2 099 patients. Incidence of male gender, smoking, dyslipidemia, hypertension, diabetes mellitus, and family history of CAD was significantly higher in CAD group than in non-CAD group (P<0.05~0.001). Detection rate of CAD significantly increased in proportion with increase of age (F=11.4,P<0.001) and was 3.1%, 6.2%, 9.7% and 12.9%, respectively in the ≤ 20,21-30,31-40 and 41-45 years groups. The proportion of single-vessel disease (72.5%) was significant higher than the multiple lesion (27.5%) in CAD patients (P<0.001). There were 183 (56.7%) non-calcified plaques including 39(12.1%) low-attenuation plaques and 54(16.7%) mixed plaques, 86(26.6%) calcified plaques including 72(22.3%) spotty calcified plaques in the 323 diseased vessels. Severe stenosis was found in 158(49.0%) vessels. Conclusions:The prevalence of CAD was 10.9% in this young patient cohort with suspected CAD and imaging features were characterized as single-vessel disease and non-calcified plaques. CCTA should be recommended to young patients with suspected CAD, especially in 30-45-year-old male patients with following risk factors:smoking, hypertension, hyperlipidemia, diabetes mellitus and family history of CAD.

12.
Journal of Medical Informatics ; (12): 60-64, 2018.
Article in Chinese | WPRIM | ID: wpr-700755

ABSTRACT

Taking abstracts of Chinese medical papers as corpus,the paper adopts the combination of 3 feature selection methods and 2 topic modeling methods to carry out topic modeling.The result shows that in the modeling methods,prediction ability and fitting degree of LDA are better than that of CTM,but in the feature selection methods,fitting degree of IDF and prediction ability of TF are better.

13.
Journal of China Medical University ; (12): 703-709, 2017.
Article in Chinese | WPRIM | ID: wpr-668132

ABSTRACT

Objective In this study,a multiplex PCR amplification system was constructed based on fluorescent labeling PCR and LDR,to provide a new strategy for analyzing severely degraded DNA.Methods Eight SNP loci (rs10802248,rs10516197,rs10488372,rs2278945,rs4757318,rs4887255,rs4889002,and rs9304473) were selected.Their LDR probes and PCR primers of linked products were designed and synthesized.Ligase detection reaction,PCR amplification,and capillary gel electrophoresis (CEG) were performed to establish the multiplex LDR-PCR amplification system.Results The genotypes of these 8 loci were obtained simultaneously by the fluorescence-labeled multiplex LDR-PCR amplification method.The loci profiles obtained by fluorescence-labeled multiplex LDR-PCR amplification were in accordance with those obtained by direct sequencing of the polymorphic regions in samples from all individuals.By fluorescence-labeled multiplex LDR-PCR amplification,the 8 SNP loci were efficiently amplified from the severely degraded FFPET DNA.Conclusion Eight SNP loci results could be obtained simultaneously by using the multiplex LDR-PCR amplification system,which is a simple,efficient,and practical SNP genotyping method with accurate and reliable results for highly degraded samples.

14.
Chinese Journal of Nephrology ; (12): 881-886, 2017.
Article in Chinese | WPRIM | ID: wpr-711071

ABSTRACT

Objective To explore the clinicopathological features and renal outcomes of primary IgA nephropathy (IgAN) patients with chronic tonsillitis.Methods Patients with biopsyproven primary IgAN admitted to The First Affiliated Hospital,Sun Yat-sen University from January 2006 to December 2011 were enrolled.The clinicopathological features and renal outcomes of patients with and without chronic tonsillitis were retrospectively compared.The primary outcome was progression to end stage renal diseases and/or doubling of serum creatinine.Results A total of 981 primary IgAN patients were enrolled and 98 patients (9.99%) had a history of chronic tonsillitis.Compared with patients without chronic tonsillitis,IgAN patients with chronic tonsillitis exhibited significantly higher prevalence of acute episodes of tonsillitis as a predisposition (P < 0.001),higher serum IgA levels (P=0.012),and higher prevalence of macrohematuria (P=0.006).No significant difference in renal pathological features was observed in patients with and without chronic tonsillitis.Moreover,the renal outcomes were similar as regards IgAN patients with and without chronic tonsillitis.Conclusion IgAN patients with chronic tonsillitis had higher prevalence of acute episodes of tonsillitis and macrohematuria as well as higher serum IgA levels.However,IgAN patients with and without chronic tonsillitis showed no significant difference in renal pathological features and renal outcomes.

15.
Chinese Journal of Biochemical Pharmaceutics ; (6): 380-382, 2017.
Article in Chinese | WPRIM | ID: wpr-621529

ABSTRACT

Objective To analyze the effect of cluster nutrition intervention and psychological intervention combined with compound Kushen injection on postoperative patients with esophageal cancer. Methods 80 patients with esophageal cancer who underwent postoperative radiotherapy and chemotherapy were divided into two groups. The control group was treated with chemotherapy alone. The observation group was treated with compound bitter ginseng injection and cluster nutrition intervention. Psychological intervention therapy. The total effective rate, the nutritional index before and after treatment, the SF-36 quality of life score and the complication rate were compared. Results The total effective rate and the post-treatment nutritional value of the observation group were higher than those of the control group. After treatment, the SF-36 scale was higher than the control group, the incidence of adverse reactions was lower than that of the control group(P<0.05). Conclusion The combination of intensive nutrition, psychological intervention and compound Sophora flavescens injection can improve the nutritional status, improve the curative effect, reduce the adverse reaction and improve the quality of life of patients with esophageal cancer after radiotherapy and chemotherapy.

16.
Journal of Forensic Medicine ; (6): 441-443, 2016.
Article in Chinese | WPRIM | ID: wpr-984876

ABSTRACT

OBJECTIVES@#To identify the species of mammalian hair using COⅠ gene mini-barcoding technology.@*METHODS@#A pair of universal primers for mammalian COⅠ gene mini-barcoding were designed. The hair DNA samples of experimental animals from 11 species in 5 orders, mammalia was amplified by PCR technology with universal primers, and the PCR products were sequenced by bi-directional DNA and after the sequences splicing the results were deposited into the BOLD database to perform the homology comparison.@*RESULTS@#The DNA of hair from all experiment animal species could be totally amplified by the mini-barcoding universal primers designed in this study. The length of amplified fragment was 147 bp. The result of homology comparison in the database showed that the closest matching species were consistent with the experiment animal species. In addition to the matching degree of Panthera leo (98.99%), all homology matching degree of the other experiment animals were 100%, and the intraspecific genetic distance of Panthera leo was 1%. The interspecific genetic distance was ten times more than the intraspecific genetic distance which could be used for species identification.@*CONCLUSIONS@#The COⅠ gene mini-barcode technology is established and can provide fast and accurate species identification for hair of mammals.


Subject(s)
Animals , Animal Fur , DNA Barcoding, Taxonomic , DNA Primers , Hair , Polymerase Chain Reaction , Species Specificity
17.
Chinese Journal of Orthopaedic Trauma ; (12): 108-113, 2015.
Article in Chinese | WPRIM | ID: wpr-469566

ABSTRACT

Objective To compare the clinical outcomes between oblique and non-oblique fixation with cannulated screws for femoral neck fractures in the elderly patients.Methods Totally 189 patients of over 65 years old were treated for femoral neck fracture from June 2007 to October 2013 at our department.Oblique fixation with cannulated screws was used in 130 cases.They were 43 males aud 87 females with an average age of 77.8 ± 7.5 years.According to Garden classification,40 cases were of Garden types Ⅰ and Ⅱ (undisplaced fractures),and 90 of Garden types Ⅲ and Ⅳ (displaced fractures).Of them 26 were Pauwells type Ⅲ.Non-oblique fixation with cannulated screws was conducted in 59 cases.They were 24 males and 35 females with an average age of 75.5 ± 8.2 years.According to Garden classification,12 cases were of Garden types Ⅰ and Ⅱ (undisplaced fractures),and 47 of Garden types Ⅲ and Ⅳ (displaced fractures).Of them,15 were Pauwells type Ⅲ.The fracture union,postoperative complications,rate of reoperation and Harris scores at the last follow-up were compared between the 2 groups.Results All the 189 patients were followed up for 10 to 38 months (average,17.4 months).The oblique fixation led to a union rate of 99.2% (129/130),a fixation failure rate of 3.1% (4/130) and a femoral head necrosis rate of 2.3% (3/130),which were not significantly different from those resulted from the non-oblique fixation [98.3% (58/59),10.2% (6/59) and 5.1% (3/59) respectively] (P > 0.05).However,the rate of femoral neck shortening [35.4% (46/130)] and the reoperation rate [3.1% (4/130)] in the oblique fixation group were significantly lower than those in the non-oblique fixation group [50.8% (30/59) and 15.3% (9/59) respectively] (P < 0.05).The mean Harris hip score at the last follow-up for the oblique fixation(75.7 ± 14.3) was significantly higher than that for the non-oblique fixation (70.8 ± 16.7) (P < 0.05).Conclusion As oblique cannulated screwing can reduce the rates of femoral neck shortening and reoperation to some extent,it may be a better fixation choice than the non-oblique cannulated screwing for femoral neck fracture in elderly patients.

18.
West China Journal of Stomatology ; (6): 291-295, 2015.
Article in Chinese | WPRIM | ID: wpr-261086

ABSTRACT

<p><b>OBJECTIVE</b>This study aims to construct a three-dimensional finite element model of a maxillary anterior teeth retraction force system in light wire technique and to investigate the difference of hydrostatic pressure and initial displacement of upper anterior teeth under different torque values of tip back bend.</p><p><b>METHODS</b>A geometric three-dimensional model of the maxillary bone, including all the upper teeth, was achieved via CT scan. To construct the force model system, lingual brackets and wire were constructed by using the Solidworks. Brackets software, and wire were assembled to the teeth. ANASYS was used to calculate the hydrostatic pressure and the initial displacement of maxillary anterior teeth under different tip-back bend moments of 15, 30, 45, 60, and 75 Nmm when the class II elastic force was 0.556 N.</p><p><b>RESULTS</b>Hydrostatic pressure was concentrated in the root apices and cervical margin of upper anterior teeth. Distal tipping and relative intrusive displacement were observed. The hydrostatic pressure and initial displacement of upper canine were greater than in the central and lateral incisors. This hydrostatic pressure and initial intrusive displacement increased with an increase in tip-back bend moment.</p><p><b>CONCLUSION</b>Lingual retraction force system of maxillary anterior teeth in light wire technique can be applied safely and controllably. The type and quantity of teeth movement can be controlled by the alteration of tip-back bend moment.</p>


Subject(s)
Humans , Finite Element Analysis , Incisor , Maxilla , Tooth Movement Techniques , Methods , Tooth Root , Torque
19.
Chinese Journal of Analytical Chemistry ; (12): 409-414, 2014.
Article in Chinese | WPRIM | ID: wpr-443709

ABSTRACT

A method based on ultra performance liquid chromatography-tandem mass spectrometry ( UPLC-MS/MS) has been proposed for the determination of coccidiostat residues in chicken skin and fat. The sample was extracted with the combination of methanol, acetonitrile, and acetic acid, and cleaned-up by Sep-Pak tC18 solid phase extraction cartridge. Data acquisition under positive electrospray mode was performed by applying multiple reaction monitoring for both identification and quantification. The limits of detection and quantification for halofuginone and robenidine were 7 μg/kg and 20 μg/kg, respectively. The limit of detection of salinomycin, monensin, narasin, maduramicin, and lasalocid was 5 μg/kg, and limit of quantification was 15 μg/kg. The recovery was 75% to 110% in the spiked concentration range from 15 μg/kg to 200 μg/kg, with intra-day precision lower than 12. 8%, and inter-day precision lower than 13 . 4%.

20.
Chinese Journal of Orthopaedic Trauma ; (12): 651-655, 2014.
Article in Chinese | WPRIM | ID: wpr-456984

ABSTRACT

Objective To explore the measurement of femoral neck shortening (FNS) after cannulated screwing for elderly femoral neck fractures and the effect of FNS on hip functional outcome.Methods Totally 214 elderly patients with femoral neck fracture were included in this study who had been treated by fixation with cannulated screws from June 2007 to October 2013.They were 71 males and 143 females,with an average age of 77.2 years.According to Garden classification system,65 cases were types Ⅰ and Ⅱ (undisplaced fractures),and 149 types Ⅲ and Ⅳ (displaced fractures).The postoperative X-ray and follow-up X-ray films were compared to observe whether the trailing end of screw shaft was exposed to the outer cortex of the proximal femur.We chose the screw which had the longest exposure of trailing end to measure the length of the exposed screw shaft as the length of FNS.FNS indexes were defined according to the ratio of the length of exposed screw shaft to the thickness of screw head.FNS degree 1:< 1 screw head; FNS degree 2:1 to 2 screw heads; FNS degree 3:> 2 screw heads.The relationships of the FNS length respectively with thefemur length decrease and Harris scores of hip functional outcome were analyzed statistically.Results FNS occurred in 78 cases,giving an incidence of FNS of 36.4% (78/214).Of them,12 cases (15.4%)were defined as degree 1,24 cases (30.8%) as degree 2,and 42 cases (53.8%) as degree 3.There was a significant positive correlation between the FNS length and the femur length decrease(r =0.919,P =0.000).The average Harris score at 12 months postoperation for 180 cases was 77.3 points (ranging from 32 to 98 points).The average Harris score for those with FNS was significantly lower than that for those without FNS (t =9.904,P =0.000).There was a significant negative correlation between the FNS length and Harris scores (r =-0.707,P =0.000).Conclusions Our measurement of FNS and FNS indexes are easy to be used in clinic.Severe FNS can influence the function of hip joint.

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