1.The dynamic changes of autophagy in carotid artery after balloon injury in rats
Lanxiang YE ; Jian YU ; Xinran CHEN ; Qiong GONG ; Qiao DING ; Songjie LIAO
Chinese Journal of Nervous and Mental Diseases 2014;(7):409-413
Objective To investigate the dynamic levels of autophagy after intimal injury of carotid artery. Meth-ods In this study ,40 male SD rats were randomly assigned to operated(n=20)and control groups(n=20). Balloon inju-ry was induced in the left carotid artery in operated groups .Rats in control groups just received carotid artery exposure without injury. Western blot was used to detect the levels of Beclin-1, LC3 and p62 at the third and seventh days. Immu-nofluorescence was used to examine the expression of Beclin-1 and LC3 at the third and seventh days. Results The ex-pression levels of Beclin-1 and LC3 were increased while the levels of P62 were decreased at the third and seventh days after carotid balloon injury. Beclin-1 and LC3 were present in neointima and medintima. The numbers of both Beclin-1 positive cells and LC3 positive cells were increased at the third and seventh days after carotid injury. The numbers of Be-clin-1 positive cells were 18.60 ± 1.34 in neointima and 6.40 ± 0.55 in medintima at third day, (27.6 ± 2.19 in neointima and 6.40±0.55 in medinitima at the seventh day,(all P=0.000,n=5). The numbers of LC3 positive cells were 10.60±1.52 in neointima and 3.00 ± 0.71 in medintima at third day, (P=0.000,n=5;at the seventh day 21.20 ± 2.49;3.00 ± 0.71,P=0.000,n=5). Conclusions This study domenstrates that autophagy was activated after carotid injury and the chang is dy-namic, which may contribute to neointima formation.
2.Application of the interactive reading mode of PBL combined with MDT in medical imaging post-graduate clinical teaching
Wu CAI ; Jianping GONG ; Zhen JIANG ; Jianbing ZHU ; Guangqiang CHEN ; Fang QIAO ; Xin DOU ; Jian HUAN ; Wei ZHANG ; Junkang SHEN
Chinese Journal of Medical Education Research 2016;15(9):947-950
Medical imaging is an interdisciplinary subject closely related to clinical and pathological subject. Its clinical reading skills' training has become the focus of postgraduate teaching. In the process of clinical teaching, the interactive reading mode of problem-based learning (PBL) combined with multi-disci-plinary team (MDT) was introduced into clinical reading meeting. The tutors chose the reading cases proved by pathology; designed in-depth issues step by step for execution of PBL teaching; guided postgraduates to delineate imaging signs and propose the diagnostic results, evidences and differential diagnoses according to the step from localizing to qualitative and then to pathological diagnosis;then guided postgraduates to attend in-depth case analysis of MDT and analyze the correlation or inconsistency between the imaging diagnosis and clinical and pathological diagnosis; exercise document retrieval and verbalization, multimedia design, and writing level of the records of the reading cases and papers. The interactive reading mode of PBL com-bined with MDT has achieved significant effects, which is worthy of further exploration and promotion.
3.CD44 variant increases the invasive ability of human breast cancer cell line MCF-7 cells.
Xin-jian FANG ; Wen-lin XU ; Jin-ling GONG ; Chen CHEN ; Li-li FANG ; Qiao-yun CHEN
Chinese Journal of Oncology 2010;32(1):22-28
OBJECTIVETo evaluate the impact of a new CD44 variant on invasion of human breast cancer cell line MCF-7, and its possible mechanisms.
METHODSThe full length cDNA encoding CD44v17 was obtained from the total RNA isolated from the MCF-7/ADR cells by reverse transcript-polymerase chain reaction (RT-PCR) and subcloned into pMD19-T vector. The CD44v17 gene sequence and reading frame were confirmed by two restriction enzymes and nucleotide sequencing, and then inserted into the eukaryotic expression vector pcDNA3.1. The pcDNA3.1-CD44v17 was transfected into MCF-7 cells by Lipofectamine. The changes of MMP-2 and MMP-9 expression at gene and protein levels were detected by RT-PCR and gelatin zymography, respectively. The number of the cells through the artificial matrix membrane in every group was counted to compare the change of the invasive ability regulated by CD44 variant. The ERK and p-ERK were investigated by Western blotting to approach the molecular mechanisms of MMP-2 and MMP-9 expression regulated by CD44 variant.
RESULTSThe new gene sequence was successfully cloned into recombinant vector pcDNA3.1 and identified by the two restriction enzymes. It was confirmed that the reconstructed plasmid contained the sequence of CD44 gene variant which was composed of 1 to 4 exons, 16 to 17 exons, and 1 to 205 bases of 18 exons. The new gene sequence was sent to NCBI for publication and obtained the registered number FJ216964. The up-regulated levels of the CD44 gene mRNA and protein were respectively detected by RT-PCR and flow cytometry in MCF-7 cells transfected with pcDNA3.1-CD44v17. The invasiveness of the cells and the activity of MMP-2 and MMP-9 were clearly activated by hyaluronic acid (HA) treatment and blocked by CD44 neutralizing antibody. Pretreated MCF-7/CD44v17 cells with the neutralizing antibody against CD44 and the inhibitor of MAPKs signaling pathway strongly block the expression of p-ERK.
CONCLUSIONA new CD44 gene variant has been found in adriamycin-resistant human breast cancer MCF-7/ADR cells. The expression vector pcDNA3.1-CD44v17 has been cloned and constructed successfully. HA can be integrated with CD44 variant and then regulates the expression of MMP-2 and MMP-9, which increases the invasion ability of MCF-7 cells through the Ras/MAPK signaling pathway.
Breast Neoplasms ; genetics ; metabolism ; pathology ; Cell Line, Tumor ; Doxorubicin ; pharmacology ; Drug Resistance, Neoplasm ; Extracellular Signal-Regulated MAP Kinases ; metabolism ; Genetic Vectors ; Humans ; Hyaluronan Receptors ; genetics ; metabolism ; Hyaluronic Acid ; pharmacology ; Matrix Metalloproteinase 2 ; genetics ; metabolism ; Matrix Metalloproteinase 9 ; genetics ; metabolism ; Neoplasm Invasiveness ; Phosphorylation ; Plasmids ; Protein Isoforms ; RNA, Messenger ; metabolism ; Recombinant Proteins ; genetics ; metabolism ; Signal Transduction ; Transfection
4.Transmission and Analysis of Drug Resistance of Acinetobacter Baumanii in ICU
di Qiao GUI ; kang Wen LIU ; kang Jian REN ; rong Jin CANG ; yan Yan GONG ; Hua WANG
Journal of Modern Laboratory Medicine 2017;32(6):109-111
Objective By detecting the distribution and homology analysis of Acinetobacter baumanii in the ICU ward,to con-trol nosocomial infection,provide theoretical basis to take effective measures.Methods From January 2016,20 patients in ICU of Shaanxi Provincial People's Hospital were taken into group.The samples of sputum and surrounding environment samples were cultured.The homology of Acinetobacter baumannii was analyzed by MALDI-Biotyper software,antimicrobial susceptibility test was analyzed by K-B.Results 27 strains of Acinetobacter baumannii were detected,mainly comes from sputum,hands of medical staffs and the environment,homology analysis results showed that the 27 strains of Acinetobacter baumannii was divided into two clusters(Ⅰtype 1 1 strains,Ⅱ type 1 6 strains),most of Acinetobacter baumannii were multi-resistant bacteria,except for the polymyxin B,minocycline and SCF.Conclusion The ways of transmission of Acineto-bacter baumanii in ICU were by medical personnel hand,pollution of the medical equipment and so on,strengthening the dis-infection and reasonable application of antimicrobial agents were taken advantageous for the prevention and control of acine-tobacter baumannii infection and transmission.
5.Severe acute respiratory syndrome epidemiology in Sichuan province.
Qiao SUN ; Juan DU ; Jian-lin WU ; Han-yan WU ; Xiao-ping ZHU ; Chao-mei YANG ; Yi GONG ; Heng YUAN
Chinese Journal of Epidemiology 2003;24(6):462-464
OBJECTIVETo explore the epidemiological characters of severe acute respiratory syndrome (SARS) in Sichuan province in order to provide evidence for prevention and control.
METHODSTo generate data on SARS in Sichuan province through descriptive and analytical studies on time, geographic distribution, population, source of infection, the way of case finding, symptom, diagnosis and treatment of the cases.
RESULTSThe peak of the epidemic last from April 16 to May 7. The number of cases in Luzhou and Guangyuan cities took up 60% of the total. Mobile population occupied 68% of the cases. Most of the patients were above the age of 20 with a sex ratio of 1.5:1 (m/f). 80% of the cases had a history of working in Guangdong province and recently returned to their hometowns. The main symptoms and signs of the SARS patients would include fever, cough and chest X-ray changes.
CONCLUSIONAll cases were imported. Fluctuation of the epidemics was mainly affected by the mobility of working population who recently returned to their hometowns. Measures concerning the prevention and control of the epidemics would mainly target on the isolation of confirmed and suspected patients who might serve as the sources of infection through setting up quarantine station, assigned hospitals and special 'fever-clinics'.
Adult ; Aged ; China ; epidemiology ; Female ; Humans ; Male ; Middle Aged ; Severe Acute Respiratory Syndrome ; diagnosis ; epidemiology ; prevention & control
6.Skeletal desmoplastic fibroma in right mandible: a case report.
Ya-gang CHEN ; Ling-ling PENG ; Qiu-ning LU ; Yu-hua SUN ; Jian-gong QIAO ; Ying ZHAO
West China Journal of Stomatology 2008;26(2):222-224
Skeletal desmoplastic fibroma is an intraosseous neoplasm that is recognized as a very scare benign tumor. It has a propensity for locally aggressive behavior and local recurrence. The aim of this article is to report a case of skeletal desmoplastic fibroma in right mandible of a 4-year-old boy. The patient was found to have a large skeletal desmoplastic fibroma in right mandible, which was resected by surgical intervention. The defect was successfully restored with a titanium plate. In the report, the etiopathogenisis, pathological, radiographic features, clinical diagnosis, therapy and prognosis of skeletal desmoplastic fibroma were diccussed.
Fibroma, Desmoplastic
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Humans
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Male
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Mandible
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Titanium
7.Nerve growth factor expression in astrocytoma and cerebrospinal fluid: a new biomarker for prognosis of astrocytoma.
Qiao-yu LI ; Yong YANG ; Yan ZHANG ; Zhi-jian ZHANG ; Ai-hua GONG ; Zhi-cheng YUAN ; Pei-song LU ; Li-ping ZHAN ; Peng WANG ; Yun FENG ; Wen-lin XU
Chinese Medical Journal 2011;124(14):2222-2227
BACKGROUNDRecent studies have discovered that nuclear translocation of nerve growth factor (NGF) and its receptor fragments function differently from the traditional model. This study aimed to uncover the nuclear expression of NGF in astrocytoma and its biological significance.
METHODSNinety-four paraffin-embedded astrocytoma specimens were subjected to immunohistochemical (IHC) and hemotoxylin & eosin (HE) staining. Preoperative cerebrospinal fluid (CSF) specimens and intraoperative snap-frozen astrocytoma tissues were assayed for NGF expression by ELISA and Western blotting. The outcome of patients who contributed samples was tracked. Each ten tissue samples from patients with traumatic brain injury who had received decompression surgery and CSF samples from patients undergoing spinal anesthesia but with no history of nervous system disease were taken as control.
RESULTSNGF-positive immunoreactive products were distributed in both the cytoplasm and nucleus of astrocytoma, but were only located in the cytoplasm of traumatic brain injury (TBI) tissue. NGF nuclear-positive rate (NPR) of grades III - IV astrocytomas (70.0%) was higher than that of grades I - II astrocytoma (28.6%, P < 0.05). NGF-NP expression positively correlated with the NGF concentration in cerebrospinal fluid (CSF) (r = 0.755, P < 0.01). Kaplan-Meier survival analysis indicated that the median survival time was 25 months for NGF-NP astrocytoma grade I - II patients and 42 months in NGF nuclear negative (NGF-NN) astrocytoma grade I - II patients (P < 0.05). In astrocytoma III - IV patients, the median survival was 7 months for NGF-NP patients and 24 months for NGF-NN patients (P < 0.01). Two types of NGF with molecular weights of 13 and 36 kDa were present in astrocytoma, but only the 36 kDa NGF was found in the CSF. NGF expression elevated as the malignancy increased.
CONCLUSIONSNGF-NP expression and NGF level in CSF were significant prognostic factors in astrocytoma patients. Because of the easy access of CSF, it may be developed as an index for early diagnosis and surveillance of astrocytoma.
Astrocytoma ; metabolism ; Biomarkers ; metabolism ; Blotting, Western ; Cerebrospinal Fluid ; metabolism ; Enzyme-Linked Immunosorbent Assay ; Female ; Humans ; Immunohistochemistry ; Male ; Middle Aged ; Nerve Growth Factor ; metabolism ; Prognosis
8.Dynamic study on the anti-HBs level of immunized children born to HBsAg-positive and HBsAg-negative mothers in hyperendemic area of hepatitis B.
Jian GONG ; Rong-cheng LI ; Yan-ping LI ; Jin-ye YANG ; Xiu-rong CHEN ; Yi NONG ; Zhao-neng HUANG ; Qiao LI ; Chong-bai LIU ; Hui ZHUANG
Chinese Journal of Epidemiology 2008;29(1):13-16
OBJECTIVETo investigate the dynamic changes of the anti-HBs level among immunized newborn infants born to HBsAg-positive and HBsAg-negative mothers in hyper-endemic area of Hepatitis B.
METHODSInfants who were regularly vaccinated with Hepatitis B vaccine and tested to be anti-HBs positive were divided into two groups according to HBsAg-positive or negative mothers in Long-an, Guangxi. Each subject was followed up 3 times during age 5 to 8. SPRIA was used to test HBsAg, anti-HBs and anti-HBc. Results During the follow-up period, positive rates of anti-HBs in children born to HBsAg-positive mothers ranged between 52.00% and 78.00%, and those with HBsAg-negative mothers was between 43.84% and 54.74%. GMT in two groups was between 55.36 mIU/ml and 95.66 mIU/ml as well as between 39.90 mIU/ml and 65.47 mIU/ml, respectively. There was no statistical significance in both positive rates and GMT between age groups. The anti-HBs level in the follow-up period of children born to HBsAg-positive mothers was higher than that of those born to HBsAg-negative mothers in the same age group. In the age group of 6-8 years with HBsAg-negative mothers, the positive rates in the follow-up period of children with high anti-HBs titers in the primary vaccination were 2.29-2.84 times of those with low titers. The anti-HBs titer of children in a follow-up period was lower than that in the primary vaccination, no matter whether they were born to HBsAg-positive mothers. However, the decline rate of children born to HBsAg-negative mothers was significantly higher than those born to HBsAg-positive mothers (84.91% vs. 61.54%; chi2 = 28.7982, P = 0.000). The incidence rate (25.64%) of a 4-fold increase in antibody titers of children born to HBsAg-positive mothers was significantly higher than that of children born to HBsAg-negative mothers (7.37%) from the primary vaccination to the follow-up period (chi2 = 6.7661, P = 0.009) with was 3.5 times of the latter. Subjects with HBsAg seroconvertion were those with low anti-HBs titers in primary vaccination.
CONCLUSIONThe anti-HBs level decreased slowly in successfully immunized children from age 5 to 8. The chance of natural booster yielded by natural infection increased in immunized children born to HBsAg-positive mothers. The anti-HBs level in the primary vaccination played an important role in prevention of seroconversion of HBsAg.
Child ; Child, Preschool ; Female ; Hepatitis B Antibodies ; blood ; immunology ; Hepatitis B Surface Antigens ; blood ; immunology ; Hepatitis B Vaccines ; immunology ; Humans ; Infant, Newborn ; Male
9.Intervention effect of smoking cessation clinics in Shanghai from 2016 to 2018
Chen-chen XIE ; Yue-ying JIANG ; Jing-rong GAO ; Jian WANG ; Kun-lei LE ; Zheng-yang GONG ; Kun XU ; Yuan-qiao SUN ; De CHEN
Shanghai Journal of Preventive Medicine 2020;32(2):125-
Objective To investigate the general situation, smoking status, smoking cessation status and one-month follow-up examination in Shanghai, providing scientific basis for further effective development of smoking cessation clinics in Shanghai. Methods A total of 841 smokers who visited the smoking cessation clinic from 2016 to 2018 were investigated and 725 patients were followed up one month later.The data thus obtained were analyzed by SPSS software. Results In general, of the visiting patients in 2018, 91.3% were male, 50.6% were 35-55 years old, 57.1% had educational background in primary school or below, and 60.2% were employees of enterprises, businesses and service industries.In terms of smoking, 44.1% of the patients smoked 10-20 cigarettes a day, 34.6% smoked for 10-20 years, and 38.6% smoked the first cigarette within 5 minutes after getting up.With regards to the situation of smoking cessation, 72.1% of the patients tried to quit smoking before going to the clinic; 14.8% of the patients used electronic cigarettes to help quit smoking; 33.9% learned about the smoking cessation clinic through the doctors; 61.4% decided to quit smoking because they were concerned about their health and the health of their family members.According to the follow-up, the rate of quitting smoking in one month in 2018 was 48.8%;44.0% of the patients believed that their own determination was the key to quit smoking; 46.2% of the patients who failed to quit smoking believed that if they tried to quit smoking again, the biggest obstacle was the onset of smoking addiction. Conclusion The establishment of smoking cessation clinics in Shanghai can help patients quit smoking.However, there are still some problems in this regard.In view of the characteristics of the patients going to the smoking cessation clinic, we should find out the weaknesses in the propaganda of the smoking cessation clinic in time.For example, it is found that there are fewer smoking women, less educated and less farmers visiting the clinic; according to the smoking situation of the patients, we should clearly focus on updating the service quality of the smoking cessation clinic; proceeding from the follow-up situation, we should find out the the approach to the construction and perfection of smoking cessation clinics in Shanghai.
10.The protective effects on allografts of adeno-associated heme-oxygenase-1 gene therapy against chronic rejection injury.
Nian-Qiao GONG ; Dun-Feng DU ; Chong DONG ; Xi-Lin CHEN ; Hui GUO ; Jian-Sheng XIAO ; Wei-Jie ZHANG ; Zheng-Bin LIN ; Zhi-Shui CHEN ; Qi-Fa YE ; Sui-Sheng XIA
Chinese Journal of Surgery 2007;45(4):254-257
OBJECTIVETo investigate the protective effects on allografts and the possible mechanism of adeno-associated heme-oxygenase-1 (AdHO-1) gene therapy against chronic rejection injury.
METHODSEx vivo AdHO-1 gene therapy was performed in vascular and renal transplantation models. The structure and function, the expression of therapeutic genes and proteins, and the immune modulation were analyzed.
RESULTSAdHO-1 gene therapy protected renal transplant against chronic rejection, but the effect was not as remarkable as that in vascular transplant. The transfected empty vehicle aggravated chronic rejection damage in renal transplantation. AdHO-1 decreased the infiltration of macrophages and CD4(+) T cells.
CONCLUSIONSAdHO-1 gene therapy can lessen damage of chronic rejection in allografts. It plays roles by protecting transplants, down-regulating immune response and inducing immune deviation.
Adenoviridae ; genetics ; Animals ; Blood Vessels ; transplantation ; CD4 Lymphocyte Count ; Chronic Disease ; Genetic Therapy ; methods ; Genetic Vectors ; Graft Rejection ; etiology ; prevention & control ; Graft Survival ; Heme Oxygenase-1 ; genetics ; Kidney Transplantation ; adverse effects ; methods ; Macrophages ; pathology ; Male ; Rats ; Rats, Inbred Lew ; Transfection ; Transplantation, Homologous