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1.
International Eye Science ; (12): 1621-1626, 2023.
Article in Chinese | WPRIM | ID: wpr-987879

ABSTRACT

AIM:To explore the effect of intravitreal injection FasL inhibitors on corneal apoptosis, Fas, FasL expression, Treg numbers in blood and lymph nodes and rejection index in rats after corneal transplantation.METHODS:A total of 24 SD rats(24 eyes)who received penetrating keratoplasty were randomly divided into two groups: PBS group received intravitreal injection of PBS(12 rats, 12 eyes)and FasL inhibitor group(12 rats, 12 eyes). Rejection index was recorded every week and blood samples and lymph node were collected at 1, 3 and 5wk after surgery to analyze the proportions of Treg. Corneal tissue was collected for detecting the expression of Fas and FasL and number of apoptosis.RESULTS: The expression of Fas, FasL in FasL inhibitor group decreased significantly compared with the PBS group(all P<0.05); Corneal cell apoptosis significantly decreased in FasL inhibitor group, and it was the lowest at 5wk after surgery; Treg numbers in blood and lymph nodes significantly increased in FasL inhibitor group at 3wk after surgery(all P<0.05); rejection index of corneal transplantation in the FasL inhibitor group was significantly lower than that of PBS group(all P<0.05).CONCLUSION:Intravitreal injection of FasL inhibitors after corneal transplantation could reduce the apoptosis in all layers of cornea, increase the number of Tregs in blood and lymph nodes, and alleviate rejection.

2.
Chinese Journal of Stomatology ; (12): 603-608, 2023.
Article in Chinese | WPRIM | ID: wpr-986122

ABSTRACT

Oligonucleotide drugs have the characteristics of targeting, modifiability and high biosafety. Recent studies have shown that oligonucleotide can be used to make biosensors, vaccine adjuvants, and has the functions of inhibiting alveolar bone resorption, promoting jaw and alveolar bone regeneration, anti-tumor, destroying plaque biofilm, and precise control of drug release. Therefore, it has a broad application prospect in the field of stomatology. This article reviews the classification, action mechanism and research status of oligonucleotide in stomatology. The aim is to provide ideas for further research and application of oligonucleotide.


Subject(s)
Humans , Alveolar Bone Loss , Biofilms , Bone Regeneration , Oligonucleotides , Oral Medicine
3.
Chinese Journal of Stomatology ; (12): 605-610, 2023.
Article in Chinese | WPRIM | ID: wpr-986117

ABSTRACT

Oligonucleotide drugs have the characteristics of targeting, modifiability and high biosafety. Recent studies have shown that oligonucleotide can be used to make biosensors, vaccine adjuvants, and has the functions of inhibiting alveolar bone resorption, promoting jaw and alveolar bone regeneration, anti-tumor, destroying plaque biofilm, and precise control of drug release. Therefore, it has a broad application prospect in the field of stomatology. This article reviews the classification, action mechanism and research status of oligonucleotide in stomatology. The aim is to provide ideas for further research and application of oligonucleotide.

4.
Chinese Journal of Radiology ; (12): 1089-1096, 2022.
Article in Chinese | WPRIM | ID: wpr-956763

ABSTRACT

Objective:To explore the effect of dynamic changes of cerebral oxygen saturation before and after treatment on the progression of infarction in patients with acute ischemic stroke (AIS).Methods:Totally 39 patients with first onset AIS within 24 hours in Tianjin First Central Hospital and Shanghai Fourth People′s Hospital Affiliated to Tongji University from May 2018 to July 2020 were enrolled retrospectively. All patients underwent multi-modal MR at admission (baseline) and within 2 weeks after standardized treatment, including diffusion weighted imaging (DWI), susceptibility weighted imaging (SWI), and dynamic magnetic sensitive contrast-enhanced magnetic resonance perfusion imaging (DSC-PWI). The degree of asymmetrically prominent cortical vein (APCV) at admission was observed on SWI, and the venous oxygen saturation (SvO 2) of APCV on the infarcted cerebral hemisphere was calculated in all patients before and after treatment. The original DWI and DSC-PWI images obtained from two MR scans were imported into the software to obtain the delayed perfusion volume [peak time (T max)>6 s] and the infarct core volume (apparent diffusion coeffivient value<620×10 -6 mm 2/s). According to the comparison of baseline infarct core (DWI-ASPECT) score and follow-up (FUP-ASPECT) score, all patients were divided into infarct progression group (27 cases) and non-infarct progression group (12 cases). Two independent sample t-test or Mann Whitney U-test were used to compare the differences of baseline infarct core volume, baseline SvO 2, SvO 2 change, baseline hypoperfusion volume and hypoperfusion volume change between the two groups. Univariate analysis and multivariate logistic regression analysis were used to obtain independent predictors of infarct progression. Pearson correlation analysis was used to evaluate the correlation between SvO 2 change, hypoperfusion volume change and infarct change score respectively. Results:Difference in baseline infarct core volume, baseline SvO 2, hypoperfusion volume and hypoperfusion volume change between infarct progression group and non-progression group had no statistical significance ( P>0.05). There was significant difference in the change of SvO 2 between the infarct progression group and non-infarct progression group after treatment [(27±11)%, (35±6)% respectively, t=-2.56, P=0.015]. Univariate logistic regression analysis showed that the change value of SvO 2 was the influencing factor of infarction progression of AIS (OR=0.872, 95%CI 0.773-0.984, P=0.026). Multivariate logistic regression analysis showed that the baseline NIHSS score (OR=1.248, 95%CI 1.042-1.494, P=0.016) was an independent predictor of infarction progression in AIS, and the change value of SvO 2 (OR=0.814, 95%CI 0.688-0.964, P=0.017) was an independent protective factor. The change of SvO 2 was positively correlated with the score of infarct change ( r=0.425, P=0.007). Conclusions:The change of SvO 2 after AIS treatment can independently predict the progress of acute infarction. Improvement of SvO 2 after treatment is conducive to delay the progress of infarction.

5.
Chinese Journal of Stomatology ; (12): 3-9, 2022.
Article in Chinese | WPRIM | ID: wpr-935822

ABSTRACT

Regenerative endodontic therapy is a tissue engineering based approach of treatment for endodontic disease. Its purpose is to achieve the regeneration of the pulp-dentin complex, thus to promote root development of the immature permanent tooth with necrotic pulp. Like other treatments based on tissue engineering techniques, the success of regenerative pulp therapy depends on such three elements as seed cells, scaffold materials and growth factors. Since its inception 20 years ago, there have been various terminologies in the literature, with similarities and differences in connotation. The present article summarizes and analyzes the term evolution, biological basis, clinical considerations and future scientific research directions of regenerative endodontics, in order to find out the unsolved scientific problems and to promote the development and standardization of this technique in clinical practice.


Subject(s)
Humans , Dental Pulp , Dental Pulp Necrosis , Regeneration , Regenerative Endodontics , Root Canal Therapy , Tissue Engineering
6.
Chinese Journal of Radiology ; (12): 142-148, 2022.
Article in Chinese | WPRIM | ID: wpr-932491

ABSTRACT

Objective:To explore the value of nomogram based on dual-energy CT (DECT) enhanced imaging in predicting postoperative recurrence-free survival (RFS) of early-stage glottic carcinoma (EGC).Methods:The clinicopathological and DECT data of patients with EGC confirmed by pathology in the Tianjin First Central Hospital from January 2015 to July 2018 were analyzed retrospectively. A total of 178 patients were enrolled, including 162 males and 16 females, with the age from 44 to 86 (62±9) years old. According to the follow-up data, the patients were divided into recurrent group ( n=32) and non-recurrent group ( n=146). The differences of clinicopathological data and DECT iodine maps parameters between the two groups were analyzed using χ 2 test, independent-sample t test and Mann-Whitney U test. The survival related cut-off values of the quantitative data between the two groups were selected by X-tile software. The survival curve was drawn using Kaplan-Meier method, and the difference of survival rate was tested with log-rank analysis. The variables with statistical differences were included in the Cox proportional hazard model for multivariate analysis to select the independent predictors of postoperative RFS. Based on the multivariate Cox analysis, the nomogram was drawn to predict the RFS at 1, 2 and 5 years. The prediction efficiency and clinical benefit of the nomogram were evaluated by C-index, calibration curve and decision curve analysis. Results:The median follow-up time was 24.3 months, ranging from 2 to 63 months. There was a significant difference in T-stage between recurrent and non-recurrent groups (χ2=9.21, P=0.002). The prognostic cutoff values obtained by X-tile software were arterial phase standardized iodine concentration (SIC AP)=0.28 and venous phase standardized iodine concentration (SIC VP)=0.87. The results of log-rank test showed that there were significant differences in RFS among patients with different T-stage, SIC AP and SIC VP (χ2=10.74, 15.50, 17.97, P=0.001,<0.001,<0.001). T-stage, SIC AP and SIC VP were identified as independent predictors of postoperative RFS (hazard ratio=2.271, 3.552, 3.266, P=0.026,<0.001, 0.003). The C-index of the nomogram combined with DECT parameter and T-stage was 0.785, which was higher than that of T-stage alone (0.622). The calibration curve showed that there was good consistency between the actual and predicted probability of the sample. The decision curve analysis showed that the clinical benefit of the nomogram was higher than that of the T-stage alone. Conclusion:The nomogram based on preoperative clinical factors (T-stage) and DECT iodine map factors (SIC AP and SIC vp) can predict the postoperative RFS of patients with EGC.

7.
Journal of Clinical Hepatology ; (12): 788-792, 2022.
Article in Chinese | WPRIM | ID: wpr-923278

ABSTRACT

Objective To investigate the clinical features and prognosis of pregnant women with HBV-related acute-on-chronic liver failure (HBV-ACLF). Methods A retrospective analysis was performed for the clinical data of 26 pregnant women with HBV-ACLF who were admitted to Shanghai Public Health Clinical Center from June 2008 to July 2020, including age, gestational weeks at disease onset, parity, initial symptoms, complications on admission, laboratory markers [white blood cell count, hemoglobin, platelet count, alanine aminotransferase, total bilirubin (TBil), albumin, serum creatinine, Model for End-Stage Liver Disease (MELD) score, HBsAg, and HBV DNA], abdominal ultrasound, mode of delivery, fetus conditions, treatment measures, and prognosis. The t -test was used for comparison of normally distributed continuous data between two groups, and the Wilcoxon rank-sum test was used for comparison of non-normally distributed continuous data between two groups; the chi-square test and the Fisher's exact test were used for comparison of categorical data between two groups. Results Among the 26 patients, 8 died within 28 days after disease onset, and the mortality rate reached 30.8%. There were 22 multiparous patients, accounting for 84.6%, and HBV-ACLF often occurred in the third trimester of pregnancy (20/26, 76.9%), with a mean gestational age of 30.9±5.8 weeks. HBV-ACLF often had atypical clinical manifestations, and initial symptoms included weakness, poor appetite (21/26, 80.8%), and yellow urine (19/26, 73.1%). Compared with the survival group, the death group had significantly higher levels of TBil ( Z =-2.056, P =0.041), prothrombin time ( Z =-2.362, P =0.016), international normalized ratio ( Z =-2.528, P =0.009), and MELD score ( Z =-2.223, P =0.026), a significantly longer time from initial symptom to diagnosis ( Z =-2.468, P =0.021), significantly higher HBV DNA level ( χ 2 =7.571, P =0.021), degree of hepatic encephalopathy ( χ 2 =24.775, P < 0.001), and incidence rate of complications ( χ 2 =5.951, P =0.042), and significantly lower levels of fibrinogen ( Z =-2.667, P =0.006) and prothrombin time activity ( Z =-2.365, P =0.016). Conclusion HBV-ACLF is a serious complication in the third trimester of pregnancy and is often observed in multiparous patients, with an extremely high short-term mortality. It often has atypical clinical manifestations in the early stage, and high MELD score, high viral load, and complications often indicate a poor prognosis.

8.
Journal of Clinical Hepatology ; (12): 565-569, 2021.
Article in Chinese | WPRIM | ID: wpr-873799

ABSTRACT

ObjectiveTo investigate the clinical features of acute hepatitis E (AHE) patients with or without severe jaundice and the risk factors for severe jaundice. MethodsA retrospective analysis was performed for the clinical data of 179 AHE patients who were admitted to Shanghai Public Health Clinical Center Affiliated to Fudan University from January 1, 2018 to March 26, 2020. According to whether total bilirubin (TBil) was >171 μmol/L, the patients were divided into AHE-mild jaundice (AHE-M) group and AHE-severe jaundice (AHE-S) group, and the two groups were compared in terms of clinical data and laboratory markers. The t test or the Mann-Whitney U test or the chi-squared test was used for comparison, and a binary logistic regression analysis was used to identify independent risk factors. ResultsOf all 179 patients, 101 (56.42%) were found to have severe jaundice. Compared with the AHE-M group, the AHE-S group had a significantly higher proportion of male patients (80.20% vs 61.54%, χ2=7.612, P=0.006), a significantly longer length of hospital stay [29 (19-45) days vs 18 (14-22) days, Z=-6.035, P<0.001], a significantly higher number of patients with liver failure (23 vs 0, χ2=18.373, P<0.001), and a significantly poorer prognosis (P<0.001). Compared with the AHE-M group, the AHE-S group had significantly higher baseline anti-HEV-IgM, alpha-fetoprotein, and liver elasticity (Z=-3.534, -3.588, and -4.496, all P<0.001), significantly lower baseline CD4 (Z=-2.015, P<0.05), significantly higher peak values of TBil, direct bilirubin, creatinine, prothrombin time, international normalized ratio, and absolute neutrophil count (Z=-11.016, -10.926, -2.726, -4.787, -4.989, and -6.016, all P<0.01), a significantly lower peak value of gamma-glutamyl transpeptidase (GGT) (Z=-4.55, P<0001), and significantly lower valley values of albumin, prealbumin (PA), and absolute lymphocyte count (Z=-4.685, -5.087, and -4.818, all P<0.001). The logistic regression analysis showed that anti-HEV-IgM (odds ratio [OR]=1.022, 95% confidence interval [CI]: 1005-1.039, P=0.012), GGT (OR=0.995, 95%CI: 0.993-0.998, P=0.001), PA (OR=0.991, 95%CI: 0.983-0.999, P=0.02), and neutrophils (OR=1.486, 95%CI: 1.169-1.889, P=0.001) were independent risk factors for severe jaundice in AHE patients. ConclusionThere is a relatively high proportion of male patients among the AHE patients with severe jaundice, with a long length of hospital stay, a large number of patients with liver failure, and poor prognosis. Anti-HEV-IgM, GGT, PA, and neutrophils are independent risk factors for severe jaundice in AHE patients.

9.
Journal of Clinical Hepatology ; (12): 425-428, 2021.
Article in Chinese | WPRIM | ID: wpr-873415

ABSTRACT

Spontaneous bacterial peritonitis (SBP) is a common serious complication of end-stage liver disease. Intestinal microecology is closely associated with the development, progression, and prognosis of SBP, and bacterial translocation is the key pathogenesis of SBP. This article summarizes the intestinal microecology in patients with liver cirrhosis and briefly describes the mechanism of action of intestinal flora in the development and progression of SBP, thus providing a theoretical basis for the clinical regulation of intestinal microecology and treatment of SBP.

10.
Chinese Journal of Experimental Traditional Medical Formulae ; (24): 88-96, 2021.
Article in Chinese | WPRIM | ID: wpr-906054

ABSTRACT

Objective:To investigate the effect of Jianpi Bufei prescription (JPBFP) on airway inflammation, airway hyperresponsiveness (AHR), and cyclic adenosine monophosphate (cAMP) signaling pathway activity in ovalbumin (OVA)-sensitized and challenged juvenile asthma rats. Method:Seventy-five male SD rats were randomly divided into a blank group (<italic>n</italic>=15) and an experimental group (<italic>n</italic>=60). The rats in the experimental group were sensitized by aluminum hydroxide gel containing 0.2% OVA and stimulated by aerosol inhalation of normal saline containing 1% OVA to induce an asthma model, followed by assignment into the following groups: a model group (<italic>n</italic>=15), a JPBFP group (<italic>n</italic>=15, 8.37 g·kg<sup>-1</sup>·d<sup>-1</sup>), an aminophylline group (<italic>n</italic>=15, 40 mg·kg<sup>-1</sup>·d<sup>-1</sup>), and a dexamethasone group (<italic>n</italic>=15, 0.1 mg·kg<sup>-1</sup>·d<sup>-1</sup>). AHR was detected by the pulmonary function analyzer, changes in inflammatory cells by white blood cell (WBC) count and differential blood count in bronchoalveolar lavage fluid (BALF), and pathological changes of lung tissues by hematoxylin-eosin (HE), Masson, and periodic acid-schiff (PAS) staining. The interleukin (IL)-4, IL-5, IL-13, interferon (IFN)-<italic>γ</italic>, and tumor necrosis factor (TNF)-<italic>α</italic> levels in serum and the cAMP level in plasma were tested by the enzyme-linked immunosorbent assay (ELISA). Protein kinase A (PKA) expression in lung tissues was detected by immunohistochemistry. The cAMP-response element-binding protein (CREB) mRNA and protein expression in lung tissues was detected by the real-time fluorescence quantitative polymerase chain reaction (Real-time PCR) and Western blot. Result:Compared with the blank group, the model group showed increased lung resistance, decreased pulmonary compliance (<italic>P</italic><0.05), elevated WBC count and proportion of eosinophils in BALF (<italic>P</italic><0.05), up-regulated levels of IL-4, IL-5, IL-13, and TNF-<italic>α</italic> in peripheral blood, declining IFN-<italic>γ</italic> level (<italic>P</italic><0.01), severe pathological changes of lung tissues, dwindled cAMP, and down-regulated PKA and CREB expression (<italic>P</italic><0.01). Compared with the model group, JPBFP inhibited AHR, reduced WBC count and proportion of eosinophils in BALF and lung resistance (<italic>P</italic><0.05), improved pathological changes of lung tissues, increased pulmonary compliance, and up-regulated cAMP in serum and PKA and CREB expression in lung tissues (<italic>P</italic><0.01). Conclusion:JPBFP can improve AHR, inhibit airway inflammation, and alleviate lung injury in asthma rats. Its mechanism may be related to the up-regulation of the activity of the cAMP/PKA/CREB signaling pathway.

11.
Journal of Public Health and Preventive Medicine ; (6): 138-141, 2021.
Article in Chinese | WPRIM | ID: wpr-862749

ABSTRACT

To analyze the distribution of HPV infection subtypes and HPV vaccination intention in Liaoyang area. Methods A total of 3 612 women in Liaoyang area who underwent HPV screening at the Department of Gynecology and Obstetrics of Liaoyang Central Hospital from November 2017 to December 2019 were enrolled in this study. The HPV infection in the population was analyzed, and the differences in HPV infection and multiple HPV infection of people at different ages were compared. The influencing factors of vaccination willingness were analyzed. Results There were 576 patients with HPV infection, and the infection rate was 15.95%. The difference in HPV infection at different ages was statistically significant (χ2=9.261, P=0.000), and the difference in multiple HPV infections at different ages was statistically significant (P<0.05). Among low-risk infections, HPV55, HPV61, and HPV81 were the main subtypes, and among high-risk infections, HPV16, HPV51, HPV66, and HPV53 were the main subtypes. In the multivariate analysis, the HPV vaccination intention of people with lower age and lower monthly family income, college students and students with non-medical majors was significantly lower. Conclusion The high-risk types of HPV in Liaoyang area are mainly HPV16, HPV51, HPV66, and HPV53. It is recommended to focus on the intervention of young people, people with low family monthly income, college students and students with a non-medical major to reduce the incidence of cervical cancer.

12.
Chinese Journal of Contemporary Pediatrics ; (12): 169-173, 2021.
Article in Chinese | WPRIM | ID: wpr-879829

ABSTRACT

OBJECTIVE@#To study the long-term clinical effect of multicenter multidisciplinary treatment (MDT) in children with renal malignant tumors.@*METHODS@#A retrospective analysis was performed on the medical data of 55 children with renal malignant tumors who were diagnosed and treated with MDT in 3 hospitals in Hunan Province from January 2015 to January 2020, with GD-WT-2010 and CCCG-WT-2016 for treatment regimens. A Kaplan-Meier survival analysis was used to analyze the survival of the children.@*RESULTS@#Of the 55 children, 10 had stage I tumor, 14 had stage Ⅱ tumor, 22 had stage Ⅲ tumor, 7 had stage IV tumor, and 2 had stage V tumor. As for pathological type, 47 had FH type and 8 had UFH type. All children underwent complete tumor resection. Of the 55 children, 14 (25%) received preoperative chemotherapy. All children, except 1 child with renal cell carcinoma, received postoperative chemotherapy. Among the 31 children with indication for radiotherapy, 21 (68%) received postoperative radiotherapy. One child died of postoperative metastasis. The incidence rate of FH-type myelosuppression was 94.4%, and the incidence rate of UFH-type myelosuppression was 100%. The median follow-up time was 21 months and the median survival time was 26 months for all children, with an overall survival rate of 98% and an event-free survival rate of 95%.@*CONCLUSIONS@#Multicenter MDT has the advantages of high success rate of operation and good therapeutic effect of chemotherapy in the treatment of children with renal malignant tumors, with myelosuppression as the most common side effects, and radiotherapy is safe and effective with few adverse events. Therefore, MDT has good feasibility, safety, and economy.


Subject(s)
Child , Humans , Family , Kidney Neoplasms/therapy , Progression-Free Survival , Retrospective Studies
13.
Acta Academiae Medicinae Sinicae ; (6): 230-234, 2021.
Article in Chinese | WPRIM | ID: wpr-878725

ABSTRACT

Objective To investigate the role of dual-layer detector energy spectral CT in resting myocardial perfusion imaging for patients with normal coronary artery. Methods One hundred and fifty-six patients with suspected coronary heart disease underwent dual-layer detector energy spectral CT coronary angiography,and resting myocardial perfusion imaging was performed for 28 patients with normal coronary artery.According to American Heart Association's 17-segmentmodel,the iodine density and effective atomic number(Z


Subject(s)
Humans , Computed Tomography Angiography , Coronary Angiography , Coronary Vessels/diagnostic imaging , Myocardial Perfusion Imaging , Tomography, X-Ray Computed
14.
Chinese Journal of Radiology ; (12): 716-722, 2021.
Article in Chinese | WPRIM | ID: wpr-910230

ABSTRACT

Objective:To investigate the feasibility of predicting lateral cervical lymph node metastasis (LLNM) in patients with papillary thyroid carcinoma (PTC) based on the nomogram constructed by dual-energy CT data.Methods:In total 417 patients with PTC confirmed by pathology in Tianjin First Central Hospital from January 2015 to December 2018 were retrospectively analyzed as a training group. Internal validation was conducted, including 139 patients in the LLNM group and 278 patients in the non-LLNM group. A total of 169 PTC patients from January 2019 to June 2020 were included as an external validation group, including 58 patients in the LLNM group and 111 patients in the non-LLNM group. The morphological characteristics of the primary thyroid lesions on dual-energy CT iodine maps were analyzed, including tumor location, maximum diameter, calcification, and extrathyroidal extension (ETE). Iodine concentration (IC) of the PTC parenchyma and the internal carotid artery on the same level in the arterial and venous phases were measured, and normalized iodine concentration (NIC) was calculated. The independent risk factors for LLNM were obtained by univariate and multivariate logistic regression analysis. Base on the results, a prediction model was constructed and expressed in the form of a nomogram. The internal and external validation of the model was carried out using ROC curve.Results:Multivariate binary logistic regression analysis showed that the lesion location in the upper polar of the thyroid, the presence of ETE, IC in arterial phase>2.9 mg/ml, IC in the venous phase>3.2 mg/ml, and NIC in the arterial phase>0.21 were independent risk factors for LLNM prediction. The nomogram based on the above factors was constructed with an area under the ROC curve (AUC) of 0.895 (95%CI 0.862-0.923). With a cut-off value of 0.79, the sensitivity and specificity were 86.3% and 75.2%, respectively. As for the external validation group, the AUC of the model was 0.887 (95%CI 0.830-0.931), with the sensitivity of 82.8%, and the specificity of 81.1%.Conclusion:The application values of the nomogram model based on dual-energy CT data in preoperative evaluation of the possibility of LLNM of PTC patients has been verified. The model constructed in this study might be helpful with the individualized treatment in a certain degree.

15.
Journal of Peking University(Health Sciences) ; (6): 43-50, 2020.
Article in Chinese | WPRIM | ID: wpr-941964

ABSTRACT

OBJECTIVE@#To evaluate the uptake of exosomes by stem cells from apical papilla (SCAP), thus to provide experimental basis for mechanism of the exosomes endocytosis by SCAP.@*METHODS@#(1) Exosomes of dental pulp stem cells (DPSCs) were isolated by hypercentrifugation combined with ultrafiltration method. The exosomes were identified by transmission electron microscopy, nanoparticle tracking analysis and western blot. (2) PKH-26 membrane labeling technology was used to mark the DPSCs derived exosomes. The labeled exosomes were co-cultured with SCAP at 37 °C as positive control group, and co-cultured with SCAP at 4 °C as the low-temperature treatment group, while the negative control group was set up. (3) Using clathrin-mediated endocytosis inhibitor chlorpromazine (CPZ, 10 μmol /L) as CPZ group, caveolae-mediated endocytosis Genistein (200 μmol/L) as Genistein group, and macropinocytosis inhibitor LY294002 (50 μmol/L) as LY294002 group to treat the SCAP respectively. Solvent control group (DMSO group) was set. Immunofluorescence staining was used to detect the red fluorescence SCAP and flow cytometry was used to analyze the proportion of SCAP labeled with red fluorescence.@*RESULTS@#(1) The bilayer membrane and cup-shaped appearance of representative exosomes were observed. The peak of the size of DPSCs-derived exosomes was at 144 nm. The exosomes expressed exosomal marker proteins TSG101 and CD63, but not GAPDH which was the cellular internal control protein. (2) Immunofluorescence staining showed that after being co-cultured at 37 °C for 6 hours, red fluorescence could be detected in SCAP but it could not be detected after being co-cultured at 4 °C for 6 hours. After endocytosis inhibition, the red fluorescence in SCAP was reduced. Flow cytometry showed that the proportion of SCAP labeled with red fluorescence in positive group was 35.0%, in negative control group was 0.5%, and in solvent control group was 29.7%, in CPZ group, Genistein group and Genistein group were reduced to 13.7%, 16.6%, and 20.9%, respectively.@*CONCLUSION@#SCAP could uptake the DPSCs derived exosomes, and low temperature could inhibit this process. The exosomes uptake of SCAP was mediated by the clathrin endocytosis pathway, caveolae-mediated endocytosis and macropinocytosis pathway.


Subject(s)
Dental Papilla , Endocytosis , Epithelial Cells , Exosomes , Stem Cells
16.
Chinese Journal of Contemporary Pediatrics ; (12): 1193-1197, 2020.
Article in Chinese | WPRIM | ID: wpr-879775

ABSTRACT

OBJECTIVE@#To study the clinical features of neuroblastoma (NB) and the factors influencing survival rate.@*METHODS@#A total of 44 children with NB who were admitted from April 2016 to February 2020 were enrolled as research subjects. A retrospective analysis was performed on their medical data and follow-up data.@*RESULTS@#The common clinical symptoms of these 44 children were fever (10/44, 23%), mass (9/44, 20%), abdominal pain (8/44, 18%), cough (7/44, 16%), pale complexion (3/44, 7%), claudication (2/44, 5%), and abnormal activity (2/44, 5%). According to the INSS stage, 2 children (4%) had stage I NB, 5 children (11%) had stage II NB, 5 children (11%) had stage III NB, and 32 children (73%) had stage IV NB. The mean follow-up time was (15.3±1.5) months, with a recurrence rate of 20% and an overall survival rate of 82%. Among the 44 children, 29 (66%) achieved event-free survival and 7 (16%) had survival with tumor. The univariate analysis showed that a pathological type of NB and an increase in serum neuron-specific enolase (NSE) decreased the overall survival rate of children with NB (P<0.05).@*CONCLUSIONS@#The clinical symptoms of children with NB are not specific at the first visit. Fever, abdominal pain, and mass are common symptoms, and there is a high proportion of children in the advanced stage. The pathological type of NB and an increase in serum NSE may be associated with a reduction in the overall survival rate of children with NB.


Subject(s)
Child , Humans , Infant , Infant, Newborn , Neoplasm Recurrence, Local , Neoplasm Staging , Neuroblastoma , Phosphopyruvate Hydratase , Retrospective Studies , Survival Rate
17.
Acta Academiae Medicinae Sinicae ; (6): 359-363, 2020.
Article in Chinese | WPRIM | ID: wpr-826356

ABSTRACT

To evaluate the effect of monochromatic energy image on inferior vena cava imaging quality on dual-layer detector spectral CT. Totally 39 patients who were clinically suspected of abdominal disease and referred to perform contrast-enhanced computed tomography(CT)were prospectively enrolled and underwent abdominal examination using a single-source,dual-detector spectral CT.The delayed phase scan was performed 3 minutes after injection of 60 ml of iopamidol(320 mg/ml)at a rate of 3 ml/s.The raw images were reconstructed to obtain conventional mixed energy images and spectral based images(SBI).The 40,50,60,and 70 keV single energy images were obtained.The CT value,noise,and signal-to-noise(SNR)of inferior vena cava and the contrast-to-noise(CNR)of inferior vena cava relative to psoas major on conventional mixed energy images and the 40,50,60,70 keV single energy images were measured.The SNRs and CNRs on monoenergetic 40-70 keV images were compared with polychromatic 120 kVp images.ANOVA was used to compare the CT value,noise,SNR,and CNR among these five groups.The optimal monoenergetic image set was chosen. The differences in CT value,noise,SNR,CNR of inferior vena cava were statistically significant among five groups(all <0.05).The SNR and CNR in 40 keV group and 50 keV group were significantly higher than those in other groups(all <0.05).The SNR of 40 keV group was significantly higher than that of 50 keV group(=0.002).The CNR of 40 keV group was not statistical different compared with that of 50 keV group(=0.630). 40 keV is the optimal monoenergetic energy level for the inferior vena cava on dual-layer detector spectral CT and may be valuable for the diagnosis of inferior vena cava disease.


Subject(s)
Humans , Abdomen , Radiographic Image Interpretation, Computer-Assisted , Signal-To-Noise Ratio , Tomography, X-Ray Computed , Vena Cava, Inferior
18.
Acta Academiae Medicinae Sinicae ; (6): 427-430, 2020.
Article in Chinese | WPRIM | ID: wpr-826344

ABSTRACT

Infective endocarditis is a microbial infection of the endocardium and can easily affect heart valve.Its characteristic lesion is vegetation formation,and the shedding of vegetation results in arterial embolism and ischemic necrosis of corresponding tissues and organs.A case of infective endocarditis with multiple extracardiac complications was described in this article.The characteristic ultrasound finding was the vegetation formation in anterior mitral valve.CT and MRI scans revealed involvements in multiple organs and blood vessels,which were manifested as splenic infarction,renal infarction,cerebral infarction,splenic aneurysm,superior mesenteric artery aneurysms,renal artery aneurysms,and distal segment stenosis and occlusion of right middle cerebral artery.


Subject(s)
Humans , Embolism , Endocarditis , Endocarditis, Bacterial , Infarction , Mitral Valve
19.
Journal of Medical Postgraduates ; (12): 144-148, 2020.
Article in Chinese | WPRIM | ID: wpr-818391

ABSTRACT

ObjectiveTo investigate the effects of pentoxifylline (PTX) on oxidative stress in brains of epileptic (EP) rats based on the nuclear factor E2 related factor 2 (Nrf2) antioxidant response element (ARE) signal pathway.MethodsThirty-six healthy and adult male Wistar rats were included in the experiment and were divided into blank control group (peritoneal injection of isotonic saline), EP control group (induced EP episode), and PTX group (induced EP episode + PTX pretreatment) according to a completely random method, then 12 rats in each group. The behavioral changes of rats in each group were monitored, and the EP attack rate and seizure latency were recorded. The rats were sacrificed to collect substantia nigra and hippocampus for testing oxidative stress indicators and expression levels of Nrf2 ARE signaling pathway-related proteins.ResultsNo abnormal reaction was observed in the control group after treatment. The EP attack rate in the EP control group reached 83.33%. The EP attack rate (33.3%) and the attack level ((2.14±0.40) vs (3.09±0.58)) in the PTX group were significantly lower than those in the EP control group, and the seizure latency was significantly longer than that in the EP control group (P0.05) ). The expression of substantia nigra tissue was significantly higher than that of the blank control group (P<0.05).ConclusionPTX can inhibit EP seizure and improve the oxidative stress in the brain of rats at the early stage of EP. The possible mechanism is that PTX can specifically activate Nrf2 ARE signaling pathway.

20.
Journal of Peking University(Health Sciences) ; (6): 893-899, 2019.
Article in Chinese | WPRIM | ID: wpr-941905

ABSTRACT

OBJECTIVE@#To evaluate the change of cell surface CXC chemokine receptor 4 (CXCR4) expression of stem cells from apical papilla (SCAP) after the inhibition of endocytotic pathway, thus to provide experimental basis for the mechanism of SCAP migration.@*METHODS@#The immunofluorescence analysis was conducted to examine the co-expression of CXCR4 and endocytotic compartments, including early endosomes, recycling endosomes and lysosomes in SCAP. Several Rab proteins were applied as markers of organelles in the endocytotic pathway, including Rab5 for early endosomes, Rab11A for recycling endosomes, and Lamp1 for lysosomes. The co-localization of CXCR4 with these endodontic compartments was further observed by proximity ligation assay (PLA). SCAP was treated with two kinds of endocytotic inhibitors, Blebbistatin and Dynasore, at a concentration of 80 μmol/L, respectively. The conditioning time was 1 hour. Flow cytometry was carried out to evaluate the proportion of SCAP that expressed CXCR4 on cell surface. The data were analysed by analysis of variance (ANOVA).@*RESULTS@#The red staining of CXCR4 on immunofluorescence confocal microscopy predominantly overlapped with the green staining of Rab5 and Rab11A, and partly overlapped with Lamp1. It indicated that most CXCR4 molecules were located in early endosomes and recycling endosomes, and some were located in lysosomes. The PLA results revealed that the co-localizaiton of CXCR4 with endocytotic compartments could be observed in early endosomes, recycling endosomes and lysosomes. According to the results of flow cytometry, the proportion of SCAP that expressed CXCR4 on cell surface was as low as 0.13%±0.10%. After the inhibition of endocytosis by pretreating the cells with the following two inhibitors, Blebbistatin and Dynasore, the percentage of SCAP that positively expressed CXCR4 on cell surface was significantly increased to 13.34%±1.31% in Blebbistatin group and 4.03%±0.92% in Dynasore group (F=16.721, P<0.001). Moreover, the number of SCAP that expressed CXCR4 on cell surface in Blebbistatin group was significantly higher than that in Dynasore group (P<0.001).@*CONCLUSION@#The inhibition of endocytotic pathway could increase the number of SCAP that expressed CXCR4 on cell surface, and provide potency for the migration of SCAP.


Subject(s)
Endocytosis , Endosomes , Lysosomes , Receptors, CXCR4 , Stem Cells
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