Aortic dissection is a dangerous and critical disease with extremely high mortality and disability rate.In clinical practice,aortic dissection should be highly suspected when patients developed dying-like severe chest and back pain.CT and MRI have been the reliable tools for diagnosing aortic dissection.In recent years,endovascular therapy has become the preferred treatment for Stanford type B aortic dissection,and some patients with Stanford type A dissection who cannot receive open surgery may also be treated with endovascular therapy.In order to improve endovascular treatment,to develop new instruments and to study the pathogenesis of aortic dissection,the preparation of stable and reliable animal models is very necessary.This paper aims to make a brief review about the research status concerning the preparation of animal models of aortic dissection.

Objective Toinvestigatethevalueofimagingdiagnosisofthe lymphangioleiomyomatosis( LAM ).MethodsFifteen patients with LAM confirmed by pathological assessment were analyzed retrospectively for radiologic findings.They had chest radiograph, chest highresolution CT (HRCT),abdominal CT, direct lymphangiography(DLG), chest CT and abdominal CT after DLG.Results Chest radiograph findings included normal (1),increasing of lung markings (3),disseminated honeycomb or reticular pattern ( 11 ), pneumothorax ( 2 ), and pleural effusion ( 14 ). Chest conventional CT and HRCT showed typical imaging manifestation of PLAM in all cases, including sporadic or disseminated cysts in bilateral lungs. According to the grading standard of pulmonary disease made by Avila et at, there were 3 cases in grade Ⅰ , 5 cases in grade Ⅱ and 7 cases in grade Ⅲ . Fourteen of 15 patients with LAM had positive abdominal CT findings in retroperitoneum and pelvic cavity. Common abdominal CT findings included cystic lymphangioma in 9 of 14 patients, lymphangiomyoma in 13 and both coexisting in 7.One of the14patients alsohadhepaticlipomaandangiomyolipomas.Onepatienthadrenal angiomyolipomas; and one patient had hysteromyoma. All 15 cases underwent DLG, 1 cases had lymphatic obstruction in the lumbar 3 level, the remaining 14 cases had varying degrees of thoracic duct stenosis, or obstruction. Neck trunk, subclavian trunk and bronchial trunk showed lymphatic reflux. On post-DLG CT,thoracic duet outlet obstruction was not demonstrated in 3 cases, the remaining 12 cases showed thoracic outlet obstruction, consistent with the DLG findings.Conclusion HRCT is a useful diagnostic method showing characteristic findings of PLAM. MSCT can help to detect abdominal LAM. DLG and MSCT after DLG have value in displaying obstruction site of thoracic duct or lymphatic trunks and provide guidance for operative treatment.

Objective To synthesize 99Tcm-TP5-3 and evaluate its biodistribution and kinetics as a molecular probe for the detection of apoptosis,and evaluate tumor apoptosis after a single dose of paclitaxel chemotherapy in MDA-MB-231 breast tumor model.Methods TP5-3 was labeled with 99Tcm directly,and analyzed with HPLC.The radioactivity in tissues was measured and expressed as ％ID/g and T/NT (tumor/muscle).The mice bearing MDA-MB-231 breast tumor were divided into two groups:the treatment group which was given a single dose of paclitaxel (40 mg· kg-1,via tail vein),and the control group which was injected with the same volume of normal saline.After therapy,99Tcm-TP5-3 was injected via tail vein in both groups (100 μ1 for each mouse).MicroSPECT/CT was performed at 3 h postinjection.Radioactivity in different tissues was determined after imaging.Apoptotic cells were measured with flow cytometry.The morphological changes of the apoptotic cells were observed by light microscopies.One-way analysis of variance,two-sample t test and linear correlation analysis were used to analyze the data.Results The radiolabeling efficiency was ＞ 95％ and the radiochemical purity of 99Tcm-TP5-3 was (96.0± 1.5)％ at room temperature for 4 h.The predominant uptake was found in the kidneys at 30 min postinjection ((8.48± 1.07) ％ID/g),with rapid tracer clearance from the circulation.By comparison with activity at 5 min postinjection ((13.74± 4.21) ％ID/g),85％ of the initial activity reduced in blood at 4 h ((2.07±0.35) ％ID/g; F=11.310,P＜ 0.05).99Tcm-TP5-3 was mainly accumulated in the kidneys,liver and stomach,and excreted via the kidneys.T/NT in the treated group was 4.21±0.06,which was significantly higher than that of the control group (1.57±0.67; t =12.820,P＜0.05).The radioactivity of tumor tissue in the treatment group was much higher than that in the control group (4.82±0.54) ％ID/g vs (1.44±0.38) ％ID/g,t=0.679,P＜0.05).The tumor uptake of 99Tcm-TP5-3 in the treatment group positively correlated well with the apoptotic cells (r =0.985,P＜0.05).Histopathology further confirmed that a large number of apoptosis had occurred in the tumor after paclitaxel treatment.Conclusion 99Tcm-TP5-3 appears to have potential to be a useful molecular probe for imaging tumor cell apoptosis.

Objective: To investigate the hepatitis C prevention and control knowledge among clinicians in Jiaxing City, Zhejiang Province, so as to provide the evidence for intensified training and improved diagnosis and treatment of hepatitis C among clinicians. Methods: In November, 2021, clinicians were sampled using a stratified random sampling method from a city-level and a county (district)-level hepatitis C designated hospital in Jiaxing City. A questionnaire survey was performed using the Questionnaire for Hepatitis C Prevention and Control Knowledge among Clinicians, and the awareness of basic knowledge, professional knowledge and related knowledge about hepatitis C prevention and control among clinicians were descriptively analyzed. Results: A total of 186 questionnaires were allocated and 179 valid questionnaires were recovered, with an effective recovery rate was 96.24%. The respondents included 107 men (59.78%) and 72 women (40.22%) and had a mean age of (37.06±9.46) years. There were 107 respondents with a bachelor degree (59.78%), 56 with junior professional titles (31.28%), and 170 from non-infectious disease departments (94.97%). The awareness of basic hepatitis C prevention and control knowledge was 96.09%, and the awareness of “Transfusion of blood containing hepatitis C virus may acquire hepatitis C” was high (98.88%), and the awareness of “Hepatitis C can be cured” was low (77.09%). The awareness of professional hepatitis C prevention and control knowledge was 3.91% to 100.00%, and the awareness of “Pathogens of hepatitis C” (100.00%) and “Recommended screening populations for hepatitis C” (86.59%) was high, while the awareness of “There are two categories of hepatitis C cases: clinically diagnosed cases and confirmed cases” (3.91%) and “Clinical diagnosis of hepatitis C: positive anti-HCV antibody + any one of abnormal liver function or epidemiological history or clinical symptoms” (3.91%) was low. The awareness rates of “The state has included antiviral agents against hepatitis C into medical insurance” was and “Antiviral agents against hepatitis C are reimbursed in outpatient and inpatient departments of our hospital” were 81.56% and 59.78%, respectively. There were 69 clinicians participating hepatitis C-related training within one year (38.55%), and the awareness of clinicians that had participated in hepatitis C-related training had a higher awareness rate of basic hepatitis C prevention and control knowledge than those without participation (100.00% vs. 93.64%, P<0.05). Conclusion The awareness of basic hepatitis C prevention and control knowledge is high among clinicians in Jiaxing City; however, the training on diagnosis and classification criteria of hepatitis C and related medical insurance policy require to be improved.

Objective: To investigate the delay in identification of pulmonary tuberculosis and influencing factors among children and adolescents in Jiaxing City, Zhejiang Province from 2013 to 2022, so as to provide the reference for targeted prevention and control measures. Methods: The information of pulmonary tuberculosis patients in Jiaxing City from 2013 to 2022 were captured from the Tuberculosis Information Management System of Chinese Disease Control and Prevention Information System, including demographics, diagnosis, treatment and etiological results. The delay in identification of pulmonary tuberculosis was analyzed among children and adolescents, and the factors affecting the delay in identification of pulmonary tuberculosis were identified using a multivariable logistic regression model. Results: A total of 2 407 pulmonary tuberculosis cases were reported among children and adolescents in Jiaxing City from 2013 to 2022, including 1 522 males (63.23%). The median age was 21.00 (interquartile range, 4.00) years. There were 410 students (17.03%), and 1 856 cases with non-local household registration (77.11%). There were 596 cases with delay in identification of tuberculosis (24.76%), 895 cases with delay in healthcare-seeking (37.18%) and 128 cases with delay in definitive diagnosis (5.32%). Multivariable logistic regression analysis that children and adolescents who occurred symptoms in the first quarter (OR=1.684, 95%CI: 1.261-2.249), were diagnosed first in county-level medical institutions (OR=3.800, 95%CI: 2.898-4.983) and had positive results of etiological testing (OR=1.534, 95%CI: 1.255-1.874) were more likely to delay in identification of pulmonary tuberculosis. Conclusions The delay in identification of pulmonary tuberculosis is associated with the time of symptom onset, the level of medical institution making first diagnosis, and the results of etiological testing. It is suggested to reinforce the publicity of pulmonary tuberculosis prevention and control, expand the coverage of screening programs and improve the diagnosis capability of medical institutions.

OBJECTIVETo investigate the effect of cytomegalovirus infection on expression of matrix metalloproteinase-2 in human endothelial cells.

METHODSHuman umbilical vein endothelial cells were cultured in vitro. Cells between 3-6 passages were infected with cytomegalovirus for different time. Expression of matrix metalloproteinase-2 mRNA was analyzed by reverse transcription-polymerase chain reaction, matrix metalloproteinase-2 activity was detected by gel zymography.

RESULTSExpression of matrix metalloproteinase-2 mRNA and its activity 6 hours after infection was almost equal to control, and was greatly enhanced 12 and 24 hours after infection.

CONCLUSIONCytomegalovirus infection up-regulates expression of matrix metalloproteinase-2 in human endothelial cells. It might be one of the mechanisms that cytomegalovirus is involved in atherosclerosis.

Cells, Cultured ; Cytomegalovirus ; physiology ; Endothelial Cells ; cytology ; metabolism ; virology ; Gene Expression Regulation, Enzymologic ; Host-Pathogen Interactions ; Humans ; Matrix Metalloproteinase 2 ; biosynthesis ; genetics ; RNA, Messenger ; genetics ; metabolism ; Reverse Transcriptase Polymerase Chain Reaction ; Umbilical Veins ; cytology

OBJECTIVETo demonstrate the chemical constituents of Alyxia sinensis.

METHODPhytochmical experiment was carried out, using column chromatograph technologies.

RESULTFive compounds have been isolated from the petroleum ether soluble part of the stems of A. sinensis. Their structures have been elucidated respectively as heptatriacontane(1), octatriacontane(2), 20-noatriacontannone(3), 20-nonatriacontanone(4), 20-tetraacontanoe(5), physcion(6), emodin(7), chrysophanol(8), coumarin(9), stigmasterol acetate(10), beta-sitosterol acetate(11), lupeol(12), betulin(13), stigmasterol(14), beta-sitosterol(15), ursolic acid(16), oleanolic acid(17).

CONCLUSIONAll these compounds are firstly been isolated from A. sinensis. And compound 5-9, 10, 11 are also been separated from Alyxiae genus for the first time.

Anthraquinones ; chemistry ; isolation & purification ; Apocynaceae ; chemistry ; Emodin ; analogs & derivatives ; chemistry ; isolation & purification ; Plant Stems ; chemistry ; Plants, Medicinal ; chemistry

Objective To explore the inhabitants' knowledge about Keshan disease(KD) in endemic area in Heilongjiang Province and analyze its influencing factors. Methods Yongjin Village, a national KD monitoring site in Fanrong Township of Fuyu County in Heilongjiang Province,was selected as an investigating spot. Specially designed questionnaire was applied in the investigation, which included three aspects, demographical information (gender, age, educational level, etc.), KD-related knowledge survey (KD prevention measures including a healthy diet supplementing selenium, preventing microbial infection, inducers such as climate change, fatigue, cold, mental shock, overeating) and KD controlling measures (take prescribed medicine, dietetic regulation and regular exercise, etc.) Results Seventy-senven point six percent(272/352) knew the disease by the name in the endemic area, while only 29.7% (81/272)and 30.8% (84/272)were aware the preventive measures and inducers , respectively. The awareness rates of KD preventive measures and inducers among the KD patients were 6/17 and 9/17 respectively. The influencing factors of the awareness rate of KD name were gender, vocation and the state of education (χ2 value were 9.838,9.878,12.462, all P < 0.05). However, factors influencing the awareness rates of preventive measures were gender and the state of education(χ2 value were 7.400,20.251, both P < 0.05). Conclusions The awareness rates of KD preventive measures and inducers axe low in the endemic area. The major factors influencing the awareness rate of KD are gender and the educational degree.

OBJECTIVETo investigate the possible reasons and the treating experiences of ophthalmic complications in order to elevate the attention of the nasal endoscopic surgeon.

METHODSThis study was involved 8 categories in 22 cases which had typical characteristic of ophthalmic complications of endoscopic sinus surgery, including injury of lamina papyracea, obstructive cyst of frontal and ethmoid sinuses, orbital infection, injuries of lacrimal passages, injury of extraocular muscles, orbital hemorrhage, optic nerve injury and arterial embolism of optic fundi. The patients were given corresponding treatment.

RESULTSInjury of lamina papyracea was cured by medical treatment while orbital infection, injury of lacrimal passages, obstructive cyst of frontal and ethmoid sinuses were completely recovered by endoscopic surgery. In one of the cases, the injured optic nerve had recovered after transnasal optic and orbital apex decompression but the other 6 sides of 6 patients had not been improved. In one case who had suffered from injury of extraocular muscles, their diplopia disappeared mostly, but the other cases had a slight diplopia after surgery. One case who had visual descending caused by orbital hemorrhage recovered. Two cases of visual loss caused by intraorbital hemorrhage and arterial embolism of optic fundi respectively were not improved.

CONCLUSIONSIt is very difficult to cure if the patients lose the sight because of optic nerve injury, orbital hemorrhage and the ischemia of orbit, however, if the patients had remnant vision the prognosis should be much better.

Adult ; Aged ; Endoscopy ; adverse effects ; Eye Diseases ; etiology ; prevention & control ; Female ; Humans ; Male ; Middle Aged ; Optic Nerve Injuries ; etiology ; prevention & control ; Otorhinolaryngologic Surgical Procedures ; adverse effects ; Paranasal Sinuses ; surgery

OBJECTIVETo investigate the role of lysine-specific demethylase 1 (LSD1) in the process of THP-1 monocyte-to-macrophage differentiation.

METHODSQuantitative reverse transcription-polymerase chain reaction (qRT-PCR) and Western blotting were performed to analyze the expression of LSD1 and interleukin-6 (IL-6) in THP-1 monocytes and THP-1-derived macrophages. Chromatin immunoprecipitation (ChIP) assay was applied to detect the occupancy of LSD1 and H3K4 methylation at IL-6 promoter during THP-1 monocyte-to-macrophage differentiation. IL-6 mRNA level and H3K4 methylation at IL-6 promoter were analyzed using qRT-PCR and ChIP assay in LSD1-knockdown THP-1 cells treated with 12-O-tetradecanoylphorbol-13-acetate (TPA) for 0, 4, 8, 12, and 24 hours. Fluorescence activated flow cytometry was performed to reveal the percentage of macrophages differentiated from THP-1 monocytes.

RESULTSThe expression of LSD1 reduced during THP-1 monocyte-to-macrophage differentiation (P<0.01). LSD1 occupancy decreased and H3K4 methylation increased at IL-6 promoter during the differentiation. With knockdown of LSD1, H3K4 methylation at IL-6 promoter was found increased after TPA treatment at different times points (all P<0.05, except 24 hours). The percentage of macrophages increased significantly in the THP-1 cells with LSD1 knockdown (P<0.05).

CONCLUSIONSLSD1 is repressed during the monocyte-to-macrophage differentiation of THP-1 cells. Suppression of LSD1-mediated H3K4 demethylation may be required for THP-1 monocyte-to-macrophage differentiation.

Cell Differentiation ; Cells, Cultured ; Dealkylation ; Histone Demethylases ; physiology ; Histones ; metabolism ; Humans ; Interleukin-6 ; genetics ; Macrophages ; cytology ; Monocytes ; cytology ; Promoter Regions, Genetic