Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 20 de 279
Filter
1.
Article in Chinese | WPRIM | ID: wpr-884501

ABSTRACT

Objective:To investigate the feasibility of the application of low tube potential scanning in dacryocystography CT.Methods:The mixture of iohexol and saline with the ration of 1∶3 as the dacryocyst was set on the nose wing of the head-neck phantom. The phantom was scanned at 80, 100, 120, 140 kV with appropriate mAs to set the volume CT dose index(CTDI vol)at 10, 15, 20, 25, 30, 35 or 40 mGy. All the images were objectively evaluated to find out the optimal scanning parameters of 80 kV/240 mAs with the same contrast-to-noise ratio(CNR)of conventional scanning condition of 120 kV/180 mAs. A total of 62 patients who conducted dacryocystography CT in Beijing Tongren Hospital from November 2019 to July 2020 were prospectively selected. They were randomly divided equally into conventional scanning group with 120 kV/180 mAs and low tube potential group with 80 kV/240 mAs. The CT number, noise (SD) and contrast-to-noise ratio (CNR) of the two groups were measured as the objective evaluation indicators of image quality. The subjective evaluation was performed by two senior radiologists using a double-blind method and a 5-scale system evaluation. Results:For the phantom study, the CNR was positively correlated with CTDI vol under the same tube potential ( r=0.985, 0.965, 0.971, 0.972, P < 0.05). With the same CNR, the radiation dose decreased with lower tube potential. Under the conventional scanning parameters of 120 kV/180 mAs, the CNR was 27.8. At the same CNR, the optimal scanning parameters were 80 kV/240 mAs. For the clinical study, the CTDI vol of conventional scanning group and low tube potential group were 31.2 and 12.8 mGy respectively, 59% decreased in low tube potential group. There were statistically significant differences in CT number of dacryocyst area, CT number of orbital fat area and noise between the two groups ( t=-3.476, 2.601, -5.704, P < 0.05). There was no statistically significante difference in CNR between 2 groups( P>0.05). Two observers had a good consistency ( Kappa >0.75). There was no statistically significante difference in subjective rating between 2 groups( P>0.05). Conclusions:Low tube potential scanning could obtain satisfactory image quality in dacryocystography CT at much lower radiation dose.

2.
Article in Chinese | WPRIM | ID: wpr-882510

ABSTRACT

Objective:To study the effects of different Epstein-Barr virus (EBV) DNA load, induction chemotherapy+ radiotherapy and concurrent radiochemotherapy on patients with stage Ⅲ nasopharyngeal carcinoma (NPC).Methods:A total of 178 patients with stage Ⅲ NPC were selected as the study subjects in the Department of Otorhinolaryngology of the First People′s Hospital of Xianning of Hubei Province from January 2012 to March 2019, including 44 patients received adjuvant chemotherapy. According to the pre-treatment EBV DNA load of 1 000 copies/ml, the patients were divided into high viral load group (EBV DNA≥1 000 copies/ml, n=53) and low viral load group (EBV DNA<1 000 copies/ml, n=125), and 14 patients in the high viral load group and 30 patients in the low viral load group received adjuvant chemotherapy. According to treatment method, the patients were divided into induction chemotherapy+ radiotherapy group ( n=105) and concurrent radiochemotherapy group ( n=73). The general clinical data, recurrence rate, 5-year overall survival (OS) rate, disease free survival (DFS) rate, local recurrence free survival (LRFS) rate and disease metastasis-free survival (DMFS) rate of each group were compared. Results:Among 178 patients with stage Ⅲ NPC, 34 cases recurred, accounting for 19.10%, and 29 cases died, accounting for 16.29%. There was a statistically significant difference in N staging between the induction chemotherapy+ radiotherapy group and the concurrent radiochemotherapy group ( χ2=6.40, P=0.01). The tumor recurrence rate in the high viral load group was 33.96% (18/53), and that in the low viral load group was 12.80% (16/125), and there was a statistically significant difference ( χ2=10.79, P<0.01). The recurrence rate of lymph nodes [(9.43% (5/53) vs. 1.60% (2/125), χ2=4.15, P=0.04], the distant metastasis rate [18.87% (10/53) vs. 5.60% (7/125), χ2=7.59, P=0.01] were significantly higher than those in the low viral load group, and there were statistically significant differences. The tumor recurrence rate of patients in the induction chemotherapy+ radiotherapy group was 17.14% (18/105), and that in the concurrent radiochemotherapy group was 21.91% (16/73), and there was no statistically significant difference ( χ2=0.63, P=0.43). The 5-year OS rate, DFS rate, LRFS rate and DMFS rate of 178 patients with stage Ⅲ NPC were 84.68%, 72.80%, 79.68% and 79.54%, respectively. The 5-year OS rate (79.25% vs. 92.80%, χ2=6.86, P<0.01), DFS rate (73.58% vs. 88.00%, χ2=5.67, P=0.01), LRFS rate (73.21% vs. 89.24%, χ2=8.32, P<0.01) and DMFS rate (65.24% vs. 78.00%, χ2=4.15, P=0.02) in the high viral load group were significantly lower than those in the low viral load group, and there were statistically significant differences. The 5-year OS rate (89.52% vs. 87.67%, χ2=0.15, P=0.70), DFS rate (84.76% vs. 82.19%, χ2=0.21, P=0.65), LRFS rate (80.38% vs. 79.84%, χ2=0.00, P=1.00) and DMFS rate (79.52% vs. 81.78%, χ2=0.05, P=0.83) in the induction chemotherapy+ radiotherapy group were not statistically significant compared with those in the concurrent radiochemotherapy group, and there were no statistically significant differences. The 5-year OS rate of 44 patients receiving adjuvant chemotherapy was significantly higher than that of patients who did not receive adjuvant chemotherapy (93.77% vs. 87.49%), and there was a statistically significant difference ( χ2=5.21, P=0.02). In the high viral load group, the 5-year OS rate of patients receiving adjuvant chemotherapy was significantly higher than that of patients who did not receive adjuvant chemotherapy (93.77% vs. 84.13%), and there was a statistically significant difference ( χ2=5.11, P=0.03). Conclusion:Induction chemotherapy+ radiotherapy can achieve the same therapeutic effect as concurrent radiochemotherapy. High viral load is associated with high recurrence rate and poor survival rate. For these patients with high viral load, treatment intensity needs to be strengthened.

3.
Article in Chinese | WPRIM | ID: wpr-910399

ABSTRACT

Objective:To investigate the impacts of the composition and physical density of tissue on the dose distribution of implanted 125I seeds, in order to provide references for the clinical dose calculation and assessment of implanted radioactive particles. Methods:The OncoSeed 6711 physical model of 125I seeds was established using thes of twareegs_brachy and was validated through the calculation of dose rate constant and the radial dose function [ g( r)] in water. Then, based on the element composition and physical density of different types of tissue, the g( r) and absorbed dose ratein water, prostate, breast, muscle, and bone were calculated. Results:The calculated dose rate constant (0.950 cGy·h -1·U -1) and g( r)in water approached the values in related literature. The absorbed dose in bone was 6.042 times than that in water at a distance of 0.05 cm from the implanted source. The difference between the absorbed doses in breast and water was more than 10% at a distance of less than 1.7 cm from the implanted source. The difference between the absorbed doses in prostate/muscle and water was less than 5% at the same radial location. Conclusions:The dose distribution of 125I seeds in some types of human tissue is significantly different from that in water, which should be carefully considered in clinical dose calculation.

4.
Article in Chinese | WPRIM | ID: wpr-910344

ABSTRACT

Objective:To evaluate the impacts of tissue heterogeneity on dose calculation of cervical brachytherapy by comparing the doses calculated by two clinically used dose calculation method and the CT image-based Monte Carlo (MC) method.Methods:This study retrospectively selected 11 patients with cervical cancer treated with 3D brachytherapy in Anhui Provincial Cancer Hospital from January 2018 to June 2020. The dose distribution of each plan was calculated via three methods, dose calculation method described in American Association of Physicist in Medicine(AAPM) Task Group No. 43 Report (TG43-BT), Acuros BV(BV-BT) used to perform accurate dose calculations in high-dose-rate (HDR) brachytherapy with phantom heterogeneity, and CT image-based EGSnrc tool kit used to perform Monte Carlosimulation (MC-BT). The dose volumes( V3 Gy, V6 Gy, V9 Gy, and V12 Gy), target volume doses( D98, D90, D50), D2 cm 3 of organs at risk (OARs) calculated by the three methods were compared. Results:The HRCTV D90obtained by TG43-BT was 6.274 Gy, which was even overestimated by around 5% compared to the result calculated by MC-BT. Meanwhile, TG43-BT overestimated the dose volumesand the target volume doses compared to MC-BT.Except for D50 and V12 Gy, the differences between the doses to tumor calculated by BV-BT and MC-BT were not statistically significant( P>0.05). There was also no significant statistical difference between the D2 cm 3 of rectum, small intestine, and sigmoid calculated by BV-BT and MC-BT ( P>0.05). In contrast, the dose to D2 cm 3 of bladder determined by MC-BT was 4.609 Gy, which was notably higher than those deter mined by TG43-BT and BV-BT. Conclusions:TG43-BT overestimated the doses to tumor targets and most OARs since the effects of tissue heterogeneity were not taken into consideration. BV-BT performed efficient calculation and most of the dose distributionin target volume and OARs obtained by BV-BT were consistent with that calculated by MC-BT. Nevertheless, low accuracy occurred for the regions near the sources and full bladder, which warrants further caution in clinical evaluation.

5.
Chinese Journal of Trauma ; (12): 750-755, 2021.
Article in Chinese | WPRIM | ID: wpr-909933

ABSTRACT

Objective:To explore the effect of calcium phosphate cement(CPC)scaffold loaded with emodin(EMO)on osteogenic activity of osteoblasts.Methods:The bone cement scaffold was prepared by mixing EMO powder and CPC powder(ratio 1∶9),adding citric acid and then was poured into polytetrafluoroethylene mold(EMO-CPC group). A dose of 0.36 g CPC powder was mixed with citric acid and injected into the polytetrafluoroethylene mold(CPC group). General morphology,setting time(initial setting time and final setting time),injection rate and compressive strength of stents were compared between the two groups. Primary osteoblasts were extracted and co-cultured with two sets of scaffolds. After co-culture for 3 days,their characterization was observed by scanning electron microscopy. Live/dead cell staining and 3-(4,5-dimethylthiazole-2)-2,5-diphenyltetrazolium bromide(MTT)colorimetric method were used to detect cell viability,toxicity and proliferation activity of scaffolds. Two sets of scaffolds were stained with immunofluorescence for osteopontin(OPN),and protein expression was observed under an inverted fluorescence microscope. After co-culture for 7 days,tetrazolium nitro blue/5-bromo-4-chloro- 3-indolyl-phosphate(NBT/BCIP)staining method was used for alkaline phosphatase(ALP)staining. After co-culture for 14 days,two sets of scaffolds were stained with Alizarin Red to detect their osteogenic activity.Results:Two sets of stents showed relatively smooth and flat topography under the scanning electron microscope. There were no significant differences in initial setting time,final setting time,injection rate and compressive strength of stents between two groups( P > 0.05). After co-culture for 3 days,the osteoblast clusters were adhered to the surface of the EMO-CPC scaffold,with good shape. Viable cell rate reached(98.2 ± 0.1)% in EMO-CPC group and(90.2% ± 0.1)% in CPC group( P <0.05). Cell proliferation activity in EMO-CPC group was stronger than that in CPC group( P < 0.05). OPN-specific staining showed that EMO-CPC group had stronger OPN protein fluorescence expression compared to CPC group. After co-culture for 7 days,expression of ALP in EMO-CPC group was higher than that in CPC group. After co-culture for 14 days,staining intensity of Alizarin Red in EMO-CPC group was more significant than that in CPC group. Conclusions:The EMO-CPC scaffold can provide a suitable environment for the growth of osteoblasts for it has better biocompatibility,cell proliferation and osteogenic activity than the CPC scaffold.

6.
Chinese Journal of Endemiology ; (12): 567-572, 2021.
Article in Chinese | WPRIM | ID: wpr-909054

ABSTRACT

Objective:To understand the prevention knowledge of brucellosis among permanent residents in the agricultural area of Hulunbuir City, Inner Mongolia Autonomous Region, and to provide a scientific basis for formulating brucellosis prevention strategies and measures.Methods:From May to December 2018, Daur Autonomous Banner of Morin Dawa and Arun Banner in the agricultural area of Hulunbuir City were selected as the survey sites. Three townships were selected from each banner, and one administrative village from each township was selected as the survey village. The permanent residents aged ≥14 who had lived in the survey village for at least one year were selected as the survey subjects. Serum was separated by the examiner and the rose-bengal plate agglutination test (RBPT) was conducted. The positive sera were further tested by tube agglutination test (SAT).Questionnaires were conducted by investigators in the form of face-to-face case interview, including general demographic information, family information, brucellosis prevention knowledge awareness status, epidemiological contact history, prevention status, general behavior, etc., to calculate the awareness rate of brucellosis prevention knowledge.Results:A total of 880 sera were isolated, of which 185 were positive for RBPT. Further examination of SAT showed that the positive rate of SAT was 17.27% (152/880). The overall awareness rate of brucellosis prevention knowledge was 46.73% (16 450/35 200). The awareness rates of males and females were 47.82% (8 473/17 720) and 45.64% (7 977/17 480), respectively. The 21 - 40 years old group had the highest awareness rate [60.94% (3 705/6 080)]. The awareness rates of primary school and below, junior high school, senior high school and above were 45.96% (11 969/26 040), 48.79% (3 962/8 120) and 49.90% (519/1 040), respectively. The awareness rate of people with livestock raising behavior in the year before the survey was 47.35% (8 011/16 920), while the awareness rate of people without such behavior was 46.17% (8 439/18 280).Conclusions:The overall awareness rate of brucellosis prevention knowledge among permanent residents in the agricultural area of Hulunbuir City is low. It is necessary to strengthen the training of relevant knowledge and strengthen the publicity and education of people with low awareness rate.

7.
Article in Chinese | WPRIM | ID: wpr-888067

ABSTRACT

The pharmacological effects of Angelicae Sinensis Radix from different producing areas are uneven. Accurate identification of its producing areas by computer vision and machine learning(CVML) is conducive to evaluating the quality of Angelicae Sinensis Radix. This paper collected the high-definition images of Angelicae Sinensis Radix from different producing areas using a digital camera to construct an image database, followed by the extraction of texture features based on the grayscale relationship of adjacent pixels in the image. Then a support vector machine(SVM)-based prediction model for predicting the producing areas of Angelicae Sinensis Radix was built. The experimental results showed that the prediction accuracy reached up to 98.49% under the conditions of the model training set occupying 80%, the test set occupying 20%, and the sampling radius(r) of adjacent pixels being 2. When the training set was set to 10%, the prediction accuracy was still over 93%. Among the three producing areas of Angelicae Sinensis Radix, Huzhu county, Qinghai province exhibited the highest error rate, while Heqing county, Yunnan province the lowest error rate. Angelicae Sinensis Radix from Minxian county, Gansu province and Huzhu county, Qinghai province were both wrongly attributed to Heqing county, Yunnan province, while most of those from Huzhu county, Qinghai province were misjudged as the samples produced in Minxian county, Gansu province. The method designed in this paper enabled the rapid and non-destructive prediction of the producing areas of Angelicae Sinensis Radix, boasting high accuracy and strong stability. There were definite morphological differences between Angelicae Sinensis Radix samples from Minxian county, Gansu province and those from Huzhu county, Qinghai province. The wrongly predicted samples from Minxian county, Gansu province and Huzhu city, Qinghai province shared similar morphological characteristics with those from Heqing county, Yunnan province. Most wrongly predicted samples from Heqing county, Yunnan province were similar to the ones from Minxian county, Gansu province in morphological characteristics.


Subject(s)
Angelica sinensis , China , Databases, Factual , Drugs, Chinese Herbal/analysis , Plant Roots/chemistry
8.
Article in Chinese | WPRIM | ID: wpr-878948

ABSTRACT

Network pharmacology and liver fibrosis(LF) model in vitro were used to analyze the underly mechanism of anti-liver fibrosis effect that induced by Piperis Longi Fructus and its major active compounds. TCMSP and TCMIP were used to search for the chemical constituents of Piperis Longi Fructus, as well as the oral bioavailability(OB), drug-likeness(DL), intercellular permeability of intestinal epithelial cells(Caco-2) and Drug-likeness grading were set as limiting conditions. The related target genes of Piperis Longi Fructus were queried by TCMSP database, while related targets of LF were screened by GeneCards databases. Interaction network was constructed using Cytoscape 3.7.1. These above data were imported into STRING database for PPI network analysis. Enrichment of gene ontology(GO) and pathway analysis(KEGG) within Bioconductor database were utilized to note functions of related targets of Piperis Longi Fructus. Finally, the core targets and pathways were preliminarily verified by in vitro experiments. The effects of piperlongumine(PL), the major active component of Piperis Longi Fructus, on proliferation of rat liver stellate cells(HSC-T6) and expression of α smooth muscle actin(α-SMA) and collagen Ⅰ were investigated. The major factors TNF-α of tumor necrosis factor(TNF) pathway and NF-κB p65, IL-6 protein expressions of LF process were examined. A total of 12 active compounds such as PL were obtained by analyzing the bioavailability and drug-like properties, which inferred to 48 targets. The functional enrichment analysis of GO obtained 1 240 GO items, mainly involving in process of biology and molecular function. A total of 99 signaling pathways were enriched in the KEGG pathway enrichment analysis, including TNF signaling pathway, cGMP-PKG signaling pathway, calcium signaling pathways. CCK-8 assay showed that PL inhibited proliferation of HSC-T6 induced by transforming growth factor-β1(TGF-β1). Western blot analysis found that treated with PL suppressed the protein expressions of α-SMA, collagen Ⅰ, TNF-α and p65 in HSC-T6. Enzyme linked immunosorbent assay(ELISA) showed that PL inhibited the expressions of TNF-α and IL-6 in the cluture supertant of HSC-T6 cells. In conclusion, PL could play an anti-liver fibrosis role by regulating TNF/NF-κB signaling pathway. This study provided the mechanism basis of anti-LF effects induced by Piperis Longi Fructus and its major active compounds, which might help for the further study of the mechanism and key targets of Piperis Longi Fructus.


Subject(s)
Animals , Caco-2 Cells , Hepatic Stellate Cells/metabolism , Humans , Liver Cirrhosis/genetics , NF-kappa B/metabolism , Rats , Signal Transduction
9.
Article in Chinese | WPRIM | ID: wpr-812941

ABSTRACT

Objective To understand the current status and changing tendency of human hookworm infections in Anhui Province. Methods According to the unified national survey scheme, a total of 48 survey sites were sampled from 16 counties (cities) in 4 ecological regions of Anhui Province using a stratified cluster random sampling method from 2014 to 2015. The hookworm eggs were detected in the fecal samples from permanent residents at ages of over one year living in the survey sites using a modified Kato-Katz thick smear method, and the subjects’health knowledge and behaviors were investigated using questionnaire survey. Results A total of 12 300 persons were examined in the 48 survey sites from 4 ecological regions of Anhui Province between 2014 and 2015, and 259 subjects were identified with hookworm infections, with a mean prevalence of 2.11%. Among the four ecological regions, the North China Plain had the highest prevalence of human hookworm infections (3.02%) and in all survey sites, Linquan County had the highest prevalence (7.03%). Ancylostoma duodenale was the predominant hookworm species identified (62.16%), and 65.64% had mild infections. The prevalence of human hookworm infections was significantly greater in women than in men (χ2 = 4.16, P < 0.05), and showed a tendency towards a rise with ages (χ2trend = 113.36, P < 0.01). In addition, the prevalence of human hookworm infections varied in occupations (χ2 = 159.41, P < 0.01) and education levels (χ2 = 34.95, P < 0.01). Questionnaire survey showed low prevalence of human hookworm infections in subjects knowing the question“how hookworm infection occurs”and denying“using fresh stools for fertilization”(χ2 = 15.05, P < 0.01; χ2 = 4.19, P < 0.05). Conclusions The prevalence of human hookworm infections has greatly decreased in Anhui Province; however, the prevalence remains relatively high in some regions and populations. The North China Plain should be regarded as the key area for hookworm disease prevention and control, and housewives and populations with advanced ages and low educational levels are key targeted populations in Anhui Province.

10.
Article in Chinese | WPRIM | ID: wpr-870174

ABSTRACT

Coronavirus disease 2019 (COVID-19) can cause great damage to the elderly patients and lead to high mortality. The clinical presentations and auxiliary examinations of the elderly patients with COVID-19 are atypical, due to the physiological ageing deterioration and basal pathological state. The treatment strategy for the elderly patients has its own characteristics and treatment protocol should be considered accordingly. To improve the diagnosis, treatment, and prevention of COVID-19 in the elderly, the Expert Committee of Geriatric Respiratory and Critical Care Medicine, China Society of Geriatrics established the "Expert consensus for the diagnosis, treatment, and prevention of coronavirus disease 2019 in the elderly" . We focused on the clinical characteristics and key points for better treatment and prevention of COVID-19 in the elderly. (1) For diagnosis, atypical clinical presentation of COVID-19 in the elderly should be emphasized, which may be complicated by underlying disease. (2) For treatment, strategy of multiple disciplinary team (mainly the respiratory and critical care medicine) should be adopted and multiple systemic functions should be considered. (3) For prevention, health care model about integrated management of acute and chronic diseases, in and out of hospital should be applied.

11.
Article in Chinese | WPRIM | ID: wpr-867603

ABSTRACT

Objective:To analyze the clinical features of patients with corona virus disease 2019 (COVID-19) in Shanghai and the risk factors for disease progression to severe cases.Methods:The clinical data of 292 adult patients with COVID-19 hospitalized in Shanghai Public Health Clinical Center from January 20 to February 10, 2020 were retrospectively analyzed, including 21 severe patients and 271 mild patients. The demographic characteristics, epidemiological history, history of underlying diseases and laboratory tests were compared between the two groups. Measurement data were compared using t test or Mann-Whitney U test. The count data were compared using chi-square test. The binary logistic regression equation was used to analyze the risk factors for the progression of patients to severe cases. Results:Among the 292 patients, there were 21 severe cases with the rate of 7.2%. One patient died, and the mortality rate was 4.8% in severe patients. The severe patients aged (65.5±15.7) years old, and 19 (90.5%) were male, 11 (52.4%) had underlying diseases, seven (33.3%) had close relatives diagnosed with COVID-19. The mild patients aged (48.7±15.7) years old, and 135 (49.8%) were male, 74 (27.3%) had underlying diseases, 36 (13.3%) had close relatives diagnosed with COVID-19. The differences between two groups were all significant statistically ( t=-4.730, χ2=12.930, 5.938 and 4.744, respectively, all P<0.05). Compared with the mild patients, the levels of absolute numbers of neutrophils, alanine aminotransferase, aspartate aminotransferase, lactate dehydrogenase, creatinine, serum cystatin C, C reactive protein (CRP), procalcitonin, D-dimer, pro-B-type natriuretic peptide (proBNP), serum myoglobin, creatine kinase (CK), creatine kinase isoenzyme (CK-MB), serum cardiactroponin I (cTn I) in severe patients were all significantly higher ( U=2 091.5, 1 928.0, 1 215.5, 729.0, 1 580.5, 1 375.5, 947.5, 789.5, 1 209.0, 1 434.0, 638.0, 964.5, 1 747.5 and 1 258.0, respectively, all P<0.05), while the levels of lymphocyte count, albumin, transferrin, CD3 + T lymphocyte count, CD8 + T lymphocyte count and CD4 + T lymphocyte count in severe patients were all significantly lower ( U=1 263.5, t=4.716, U=1 214.0, 962.0, 1 167.5 and 988.0, respectively, all P<0.05). Further logistic regression analysis showed that the albumin (odds ratio ( OR)=0.806, 95% confiderce interval ( CI)0.675-0.961), serum myoglobin ( OR=1.010, 95% CI 1.004-1.016), CRP ( OR=1.016, 95% CI 1.000-1.032), CD3 + T lymphocyte count ( OR=0.996, 95% CI 0.991-1.000) and CD8 + T lymphocyte count ( OR=1.006, 95% CI 1.001-1.010) at admission were independent risk factors for the progression of COVID-19 patients to severe illness (all P<0.05). Conclusions:Severe patients with COVID-19 in Shanghai are predominantly elderly men with underlying diseases. Albumin, CRP, serum myoglobin, CD3 + T lymphocyte count and CD8 + T lymphocyte count could be used as early warning indicators for severe cases, which deserve more clinical attention.

12.
Clinical Medicine of China ; (12): 376-379, 2020.
Article in Chinese | WPRIM | ID: wpr-867543

ABSTRACT

Objective:To explore the relationship between blocking antibody and lymphocyte subsets in elderly patients (age≥35 years old) with recurrent spontaneous abortion(RSA).Methods:A retrospective case-control study was conducted on the patients with recurrent spontaneous abortion who met the inclusion criteria from October 2014 to September 2019 in the Reproductive Center of Women Health Center of Shanxi.They were divided into two groups according to their ages: 66 cases in RSA group and 334 cases in normal pregnant age group.The blocking antibody and lymphocyte subsets were detected by flow cytometry.Results:The negative rate of blocking antibody in elderly recurrent spontaneous abortion patients was 77.27% (51/66), which was not significantly different from that in normal gestational recurrent spontaneous abortion patients (83.53%(279/334)) ( P=0.221), but significantly higher than that in normal women (23.46%(42/179)) ( P=0.001). The blocking antibody′s blocking efficiency results showed that the CD3′s blocking efficiency of elderly recurrent spontaneous abortion patients (0.10 (-0.50, 0.60)) was significantly lower than that of normal women (0.60 (0.00, 1.30)), the difference was statistically( P=0.001). The CD8 blocking efficiency of elderly recurrent spontaneous abortion patients (0.00 (-0.60, 0.63)) was significantly lower than that of normal women (0.30 (0.00, 0.70)), the difference was statistically( P=0.016). Lymphocyte subsets showed that the CD8 + T cell ratio in elderly recurrent spontaneous abortion patients (26.93±7.25) was significantly lower than that in normal gestational recurrent spontaneous abortion patients (29.22±7.29), the difference was statistically significant ( P=0.020). The CD4 + /CD8 + ratio in elderly recurrent spontaneous abortion patients (1.64±0.99) was significantly higher than that in normal gestational age recurrent spontaneous abortion patients (1.37±0.50), the difference was statistically significant ( P=0.030). The ratio of natural killer cells in elderly recurrent spontaneous abortion patients (16.13±7.10) was significantly higher than that in normal women (14.04±2.35), the difference was statistically significant ( P=0.022), and higher than that in normal gestational age recurrent spontaneous abortion women (15.57±7.02). Conclusion:There were differences in lymphocyte subsets between elderly RSA patients and normal pregnant women, and the increase of natural killer cell ratio may be an important factor in the occurrence of RSA, especially in elderly RSA patients.

13.
Article in Chinese | WPRIM | ID: wpr-865342

ABSTRACT

Objective:To observe the clinical effect of the biological amniotic membrane transplantation combined with interferon α2b eye drops (interferon eye drops) in the treatment of primary pterygium.Methods:A randomized controlled clinical trial was used, 49 patients (55 eyes) of primary pterygium were selected in Beijing Tongren eye center from June to December, 2018, and all the subjects finished the follow up on time.The patients were randomly divided into two groups by random number table method, with 25 eyes of 23 patients in the experimental group and 30 eyes of 26 patients in the control group.The experimental group was treated with pterygium resection combined with amniotic membrane transplantation and interferon eye drops, while the control group was treated with pterygium resection combined with conjunctival autograft transplantation.Meanwhile the experimental group was treated with interferon eye drops on the 3rd day after surgery for 3 months.Follow up was done on the 3rd day, 7th day, 1st month, 3rd month and half a year after the surgery.The best corrected visual acuity (BCVA), heal of corneal epithelial defect and pterygium recurrence rate were observed.Written informed consent was obtained from each subject prior to entering the study cohort.The study protocol was approved by the Ethics Committee of Beijing Tongren Hospital (No.TRECKY2018-043).Results:At 6 months after surgery, there was no significant difference in number of eyes with decrease, stable or increase of BCVA between the two groups ( P=0.259); Cornea epithelium of one eye in each group was healed within 14 days, and the cornea epithelia were healed within 7 days in all rest cases of the two groups, and there was no significant difference in the healing time of corneal epithelium between the two groups ( P=1.000); At 6 months after the surgery, there was no true recurrence in the two groups, and there was no significant difference between the two groups of grade 1, 2 and 3 patients with conjunctival hyperplasia ( Z=0.461, P=0.497). There were three eyes (3/25, 12.0%) and two eyes (2/30, 6.7%) had fibrovascular tissue hyperplasia in the experimental group and control group, respectively, but fibrovasular tissue hyperplasia was only appeared at the junction of conjunctiva and graft, and did not reach the center of the and graft or the limbus of cornea. Conclusions:Compared with the traditional conjunctival autograft transplantation, amniotic membrane transplantation combined with interferon eye drops has no higher recurrence rate for the treatment of primary pterygium, while it is getting less damage to the healthy conjunctival tissue.

14.
Article in Chinese | WPRIM | ID: wpr-798759

ABSTRACT

Objective@#To investigate the expression and clinical significance of Bcl-2/adenovirus E1B19kDa interacting protein 3 (BNIP3) in serum and cerebrospinal fluid (CSF) of patients with severe hand, foot and mouth disease (HFMD).@*Methods@#Ninety children with HFMD were classified into three groups with 30 in each group: critical group (clinical stage 3), severe group (clinical stage 2) and common group (clinical stage 1, excluding encephalitis with CSF and other examinations). Another thirty healthy children were randomly selected as the control group. The levels of BNIP3 in serum and CSF were detected before and after treatment. Moreover, serum neuro-specific enolase (NSE) and S100B protein were also measured to analyze their correlation with BNIP3. Receiver operating characteristic (ROC) curve was used to evaluate the prediction efficiency of BNIP3 for the severity of HFMD.@*Results@#The levels of serum BNIP3, S100B protein and NSE in the critical group were higher than those in the other three groups (P<0.01). CSF BNIP3 level in the critical group were significantly higher than that in the common and severe groups (P<0.01). Serum BNIP3, S100B protein and NSE were significantly higher in the severe group than in common and control groups (P<0.01). CSF BNIP3 was significantly increased in the severe group as compared with that in the common group (P<0.01). After treatment, the levels of BNIP3, S100B protein and NSE in serum and BNIP3 in CSF were decreased in both critical and severe groups (P<0.01). The levels of BNIP3 in serum and CSF were positively correlated with the level of S100B protein and NSE (P<0.01). Serum BNIP3 had the highest Youden value at the cut-off value of 3.015 μg/L, with a sensitivity of 83.33% and a specificity of 90.00%, in the prediction of severe HFMD. CSF BNIP3 had the highest Youden value at the cut-off value of 1.735 μg/L, with a sensitivity of 73.33% and a specificity of 93.33%, in the prediction of severe HFMD.@*Conclusions@#BNIP3 is involved in the pathological process of brain injury in children with severe HFMD. Detection of BNIP3 helps evaluate the severity and prognosis of HFMD.

15.
Chinese Medical Journal ; (24): E007-E007, 2020.
Article in English | WPRIM | ID: wpr-811525

ABSTRACT

Background@#A patient’s infectivity is determined by the presence of the virus in different body fluids, secretions, and excreta. The persistence and clearance of viral RNA from different specimens of patients with 2019 novel coronavirus disease (COVID-19) remain unclear. This study analyzed the clearance time and factors influencing 2019 novel coronavirus (2019-nCoV) RNA in different samples from patients with COVID-19, providing further evidence to improve the management of patients during convalescence.@*Methods@#The clinical data and laboratory test results of convalescent patients with COVID-19 who were admitted to from January 20, 2020 to February 10, 2020 were collected retrospectively. The reverse transcription polymerase chain reaction (RT-PCR) results for patients’ oropharyngeal swab, stool, urine, and serum samples were collected and analyzed. Convalescent patients refer to recovered non-febrile patients without respiratory symptoms who had two successive (minimum 24 h sampling interval) negative RT-PCR results for viral RNA from oropharyngeal swabs. The effects of cluster of differentiation 4 (CD4)+ T lymphocytes, inflammatory indicators, and glucocorticoid treatment on viral nucleic acid clearance were analyzed.@*Results@#In the 292 confirmed cases, 66 patients recovered after treatment and were included in our study. In total, 28 (42.4%) women and 38 men (57.6%) with a median age of 44.0 (34.0–62.0) years were analyzed. After in-hospital treatment, patients’ inflammatory indicators decreased with improved clinical condition. The median time from the onset of symptoms to first negative RT-PCR results for oropharyngeal swabs in convalescent patients was 9.5 (6.0–11.0) days. By February 10, 2020, 11 convalescent patients (16.7%) still tested positive for viral RNA from stool specimens and the other 55 patients’ stool specimens were negative for 2019-nCoV following a median duration of 11.0 (9.0–16.0) days after symptom onset. Among these 55 patients, 43 had a longer duration until stool specimens were negative for viral RNA than for throat swabs, with a median delay of 2.0 (1.0–4.0) days. Results for only four (6.9%) urine samples were positive for viral nucleic acid out of 58 cases; viral RNA was still present in three patients’ urine specimens after throat swabs were negative. Using a multiple linear regression model (F=2.669, P=0.044, and adjusted R2=0.122), the analysis showed that the CD4+ T lymphocyte count may help predict the duration of viral RNA detection in patients’ stools (t=-2.699, P=0.010). The duration of viral RNA detection from oropharyngeal swabs and fecal samples in the glucocorticoid treatment group was longer than that in the non-glucocorticoid treatment group (15 days vs 8.0 days, respectively; t=2.550, P=0.013) and the duration of viral RNA detection in fecal samples in the glucocorticoid treatment group was longer than that in the non-glucocorticoid treatment group (20 days vs 11 days, respectively; t=4.631, P <0.001). There was no statistically significant difference in inflammatory indicators between patients with positive fecal viral RNA test results and those with negative results (P >0.05).@*Conclusions@#In brief, as the clearance of viral RNA in patients’ stools was delayed compared to that in oropharyngeal swabs, it is important to identify viral RNA in feces during convalescence. Because of the delayed clearance of viral RNA in the glucocorticoid treatment group, glucocorticoids are not recommended in the treatment of COVID-19, especially for mild disease. The duration of RNA detection may relate to host cell immunity.

16.
Article in Chinese | WPRIM | ID: wpr-828878

ABSTRACT

OBJECTIVE@#To prepare the recombinant peptide MVF-HER3 I composed of the 183-227aa peptide segment of human epidermal growth factor receptor 3 (HER3 I) and the measles virus protein 288-302 peptide segment (MVF), and prepare polyclonal antibodies (PcAb) against this recombinant peptide.@*METHODS@#The MVF-HER3 I gene was synthesized chemically and subcloned into pET21b or pET32a plasmid containing Thioredoxin (Trx) tag gene. The recombinant plasmids were identified by endonuclease digestion. MVF-HER3 I was expressed in BL21(DE3) cells under an optimal bacterial expression condition. The fusion protein Trx-MVF-HER3 I was purified using nickel ion affinity chromatography, and the purified protein was digested by enterokinase to remove Trx tag. The digested mixture underwent further nickel ion affinity chromatography to obtain purified MVF-HER3 I. The purified MVF-HER3 I was used to immunize SD rats subcutaneously for preparing anti-MVF-HER3 I PcAb. The titer of PcAb was determined using ELISA. The bindings of anti-MVF-HER3 I PcAb to MVF-HER3 I, native HER3 and MCF7 cells were analyzed using immunoblotting, immunoprecipitation and laser confocal microscopy. The growth inhibition effect of the antibodies on MCF7 cells cultured in the absence or presence of NRG was assessed using sulforhodamine B.@*RESULTS@#The recombinant peptide gene could not be expressed alone, but could be efficiently expressed after fusion with Trx gene under optimized conditions. The fusion peptide MVF-HER3 I was successfully prepared from Trx-MVF-HER3 I. The anti-MVF-HER3 I PcAb, with a titer reaching 1: 512 000, specifically bound to MVF-HER3 I, recognized native HER3 and bound to the membrane of MCF7 cells. The obtained PcAb could dose-dependently inhibit the growth of MCF7 cells irrespective of the presence or absence of NRG.@*CONCLUSIONS@#We successfully obtained the recombinant peptide MVF-HER3 I and prepared its PcAb, which can facilitate further functional analysis of HER3 signaling pathway.


Subject(s)
Animals , Antibodies , Enzyme-Linked Immunosorbent Assay , Escherichia coli , Humans , Plasmids , Rats , Rats, Sprague-Dawley , Receptor, ErbB-3 , Allergy and Immunology , Recombinant Fusion Proteins
17.
Chinese Medical Journal ; (24): 1039-1043, 2020.
Article in English | WPRIM | ID: wpr-827703

ABSTRACT

BACKGROUND@#A patient's infectivity is determined by the presence of the virus in different body fluids, secretions, and excreta. The persistence and clearance of viral RNA from different specimens of patients with 2019 novel coronavirus disease (COVID-19) remain unclear. This study analyzed the clearance time and factors influencing 2019 novel coronavirus (2019-nCoV) RNA in different samples from patients with COVID-19, providing further evidence to improve the management of patients during convalescence.@*METHODS@#The clinical data and laboratory test results of convalescent patients with COVID-19 who were admitted to from January 20, 2020 to February 10, 2020 were collected retrospectively. The reverse transcription polymerase chain reaction (RT-PCR) results for patients' oropharyngeal swab, stool, urine, and serum samples were collected and analyzed. Convalescent patients refer to recovered non-febrile patients without respiratory symptoms who had two successive (minimum 24 h sampling interval) negative RT-PCR results for viral RNA from oropharyngeal swabs. The effects of cluster of differentiation 4 (CD4)+ T lymphocytes, inflammatory indicators, and glucocorticoid treatment on viral nucleic acid clearance were analyzed.@*RESULTS@#In the 292 confirmed cases, 66 patients recovered after treatment and were included in our study. In total, 28 (42.4%) women and 38 men (57.6%) with a median age of 44.0 (34.0-62.0) years were analyzed. After in-hospital treatment, patients' inflammatory indicators decreased with improved clinical condition. The median time from the onset of symptoms to first negative RT-PCR results for oropharyngeal swabs in convalescent patients was 9.5 (6.0-11.0) days. By February 10, 2020, 11 convalescent patients (16.7%) still tested positive for viral RNA from stool specimens and the other 55 patients' stool specimens were negative for 2019-nCoV following a median duration of 11.0 (9.0-16.0) days after symptom onset. Among these 55 patients, 43 had a longer duration until stool specimens were negative for viral RNA than for throat swabs, with a median delay of 2.0 (1.0-4.0) days. Results for only four (6.9%) urine samples were positive for viral nucleic acid out of 58 cases; viral RNA was still present in three patients' urine specimens after throat swabs were negative. Using a multiple linear regression model (F = 2.669, P = 0.044, and adjusted R = 0.122), the analysis showed that the CD4+ T lymphocyte count may help predict the duration of viral RNA detection in patients' stools (t = -2.699, P = 0.010). The duration of viral RNA detection from oropharyngeal swabs and fecal samples in the glucocorticoid treatment group was longer than that in the non-glucocorticoid treatment group (15 days vs. 8.0 days, respectively; t = 2.550, P = 0.013) and the duration of viral RNA detection in fecal samples in the glucocorticoid treatment group was longer than that in the non-glucocorticoid treatment group (20 days vs. 11 days, respectively; t = 4.631, P  0.05).@*CONCLUSIONS@#In brief, as the clearance of viral RNA in patients' stools was delayed compared to that in oropharyngeal swabs, it is important to identify viral RNA in feces during convalescence. Because of the delayed clearance of viral RNA in the glucocorticoid treatment group, glucocorticoids are not recommended in the treatment of COVID-19, especially for mild disease. The duration of RNA detection may relate to host cell immunity.


Subject(s)
Adult , Aged , Betacoronavirus , Genetics , Clinical Laboratory Techniques , Coronavirus Infections , Diagnosis , Genetics , Rehabilitation , Female , Humans , Male , Middle Aged , Pandemics , Pneumonia, Viral , Genetics , Rehabilitation , RNA, Viral , Genetics , Real-Time Polymerase Chain Reaction , Retrospective Studies
18.
Article in Chinese | WPRIM | ID: wpr-824822

ABSTRACT

Objective To investigate the expression and clinical significance of Bcl-2/adenovirus E1B19kDa interacting protein 3 (BNIP3) in serum and cerebrospinal fluid (CSF) of patients with severe hand, foot and mouth disease (HFMD). Methods Ninety children with HFMD were classified into three groups with 30 in each group:critical group (clinical stage 3), severe group (clinical stage 2) and common group (clinical stage 1, excluding encephalitis with CSF and other examinations). Another thirty healthy children were randomly selected as the control group. The levels of BNIP3 in serum and CSF were detected before and after treatment. Moreover, serum neuro-specific enolase ( NSE) and S100B protein were also measured to analyze their correlation with BNIP3. Receiver operating characteristic ( ROC) curve was used to evaluate the prediction efficiency of BNIP3 for the severity of HFMD. Results The levels of serum BNIP3, S100B protein and NSE in the critical group were higher than those in the other three groups ( P<0. 01). CSF BNIP3 level in the critical group were significantly higher than that in the common and severe groups (P<0. 01). Serum BNIP3, S100B protein and NSE were significantly higher in the severe group than in common and control groups (P<0. 01). CSF BNIP3 was significantly increased in the severe group as compared with that in the common group (P<0. 01). After treatment, the levels of BNIP3, S100B protein and NSE in serum and BNIP3 in CSF were decreased in both critical and severe groups (P<0. 01). The lev-els of BNIP3 in serum and CSF were positively correlated with the level of S100B protein and NSE ( P<0. 01). Serum BNIP3 had the highest Youden value at the cut-off value of 3. 015μg/L, with a sensitivity of 83. 33% and a specificity of 90. 00%, in the prediction of severe HFMD. CSF BNIP3 had the highest Youden value at the cut-off value of 1. 735 μg/L, with a sensitivity of 73. 33% and a specificity of 93.33%, in the prediction of severe HFMD. Conclusions BNIP3 is involved in the pathological process of brain injury in children with severe HFMD. Detection of BNIP3 helps evaluate the severity and prognosis of HFMD.

19.
Article in Chinese | WPRIM | ID: wpr-817577

ABSTRACT

Objective To analyze the clinical features of patients with coronavirus disease 2019 (COVID-19) in Shanghai and to investigate the risk factors for disease progression to severe cases. Methods The clinical data of 292 adult patients with COVID-19 hospitalized in Shanghai Public Health Clinical Center from January 20, 2020 to February 10, 2020 were retrospectively analyzed, including 21 severe patients and 271 mild patients. The demographic characteristics, epidemiological history, history of underlying diseases and laboratory examinations were compared between the two groups. Measurement data were compared using t test or Mann-Whitney U test. The count data were compared using hi-square test. The binary logistic regression equation was used to analyze the risk factors for the progression of patients to severe cases. Results Among the 292 patients, 21 were severe cases with the rate of 7.2% (21/292). One patient died, and the mortality rate was 4.8% in severe patients. The severe patients aged (65.0±15.7) years old, 19 (90.5%) were male, 11 (52.4%) had underlying diseases, 7 (33.3%) had close relatives diagnosed with COVID-19. The mild patients aged (48.7±15.7) years old, 135 (49.8%) were male, 74 (27.3%) had underlying diseases, 36 (13.3%) had close relatives diagnosed with COVID-19. The differences between two groups were all significant statistically ( t =-4.730, χ 2 =12.930, 5.938 and 4.744, respectively, all P <0.05). Compared with the mild patients, the levels of absolute numbers of neutrophils, alanine aminotransferase, aspartate aminotransferase, lactate dehydrogenase, creatinine, serum cystatin C, C reactive protein (CRP), procalcitonin , D -dimer, pro-B-type natriuretic peptide (proBNP), serum myoglobin, creatine kinase (CK), creatine kinase isoenzyme (CK-MB), serum troponin I (cTnI) in severe patients were all significantly higher ( U =2 091.5, 1 928.0, 1 215.5, 729.0, 1 580.5, 1 375.5, 917.5, 789.5, 1 209.0, 1 434.0, 638.0, 964.5, 1 258.0 and 1 747.5, respectively, all P <0.05), while the levels of lymphocyte count, albumin, transferrin, CD3 + T lymphocyte count, CD8 + T lymphocyte count and CD4 + T lymphocyte count in severe patients were all significantly lower ( U =1 263.5, t =4.716, U =1 214.0, 962.0, 1 167.5 and 988.0, respectively, all P <0.05). Further logistic regression analysis showed that the albumin (odds ratio ( OR )=0.806, 95% CI 0.675-0.961), CRP ( OR =1.016, 95% CI 1.000-1.032), serum myoglobin ( OR =1.010, 95% CI 1.004-1.016), CD3 + T lymphocyte count ( OR =0.996, 95% CI 0.991-1.000) and CD8 + T lymphocyte count ( OR =1.006, 95% CI 1.001-1.010) at admission were independent risk factors for the progression of COVID-19 patients to severe illness (all P <0.05). Conclusions Severe cases of patients with COVID-19 in Shanghai are predominantly elderly men with underlying diseases. Albumin, CRP, serum myoglobin, CD3 + T lymphocyte count and CD8 + T lymphocyte count could be used as early warning indicators for severe cases, which deserve more clinical attention.

20.
Article in Chinese | WPRIM | ID: wpr-772049

ABSTRACT

OBJECTIVE@#To investigate whether autophagy mediates the effects of aldehyde dehydrogenase 2 (ALDH2) on the proliferation of neonatal rat cardiac fibroblasts cultured in high glucose.@*METHODS@#Cardiac fibroblasts were isolated from neonatal (within 3 days) SD rats and subcultured. The fibroblasts of the third passage, after identification with immunofluorescence staining for vimentin, were treated with 5.5 mmol/L glucose (control group), 30 mmol/L glucose (high glucose group), or 30 mmol/L glucose in the presence of Alda-1 (an ALDH2 agonist), daidzin (an ALDH2 2 inhibitor), or both. Western blotting was employed to detect ALDH2, microtubule-associated protein 1 light chain 3B subunit (LC3B) and Beclin-1 in the cells, and a hydroxyproline detection kit was used for determining hydroxyproline content in cell culture medium; CCK- 8 kit was used for assessing the proliferation ability of the cardiac fibroblasts after the treatments.@*RESULTS@#Compared with the control cells, the cells exposed to high glucose exhibited obviously decreased expressions of ALDH2, Beclin-1 and LC3B and increased cell number and hydroxyproline content in the culture medium. Treatment of the high glucose-exposed cells with Alda-1 significantly increased Beclin-1, LC3B, and ALDH2 protein expressions and lowered the cell number and intracellular hydroxyproline content, whereas the application of daidzin resulted in reverse changes in the expressions of ALDH2, Beclin-1 and LC3B, viable cell number and intracellular hydroxyproline content in high glucose-exposed cells.@*CONCLUSIONS@#Mitochondrial ALDH2 inhibits the proliferation of neonatal rat cardiac fibroblasts induced by high glucose, and the effect is possibly mediated by the up-regulation of autophagy-related proteins Beclin-1 and LC3B.


Subject(s)
Aldehyde Dehydrogenase , Aldehyde Dehydrogenase, Mitochondrial , Metabolism , Animals , Animals, Newborn , Autophagy , Beclin-1 , Physiology , Fibroblasts , Glucose , Microtubule-Associated Proteins , Mitochondrial Proteins , Rats , Rats, Sprague-Dawley
SELECTION OF CITATIONS
SEARCH DETAIL