OBJECTIVETo separate and characterize aqueous extracts of Salvia miltiorrhiza and Carthamus tinctorius to efficient, high-throughput and strong polar components, to observe effects of their aqueous effective components compatibility on rat myocardial ischemic reperfusion injury.

METHODMyocardial ischemic reperfusion injury model were established on SD rats by 40 min ligation of the left anterior descending artery and 120 min reperfusion. The rats were injected experimental drugs intravenously from femoral vein after 10 min ischemia. Rats were randomly divided into sham group (the suture around the left anterior descending coronary artery was not tied), model group, Danhong injection group (content of protocatechualdehyde is 0.05 g x L(-1), injection dosage equivalent to 1.80 g x kg(-1)), aqueous effective component of S. miltiorrhiza group (content of salvianolic acid B is 49 g x L(-1), injection dosage equivalent to 30.68 g x kg(-1)), aqueous effective component of S. miltiorrhiza group (content of hydroxysafflor yellow A is 31.76 g x L(-1), injection dosage equivalent to 17.87 g x kg(-1)), aqueous effective components compatibility of S. miltiorrhizae and C. tinctorius group (injection dosage is respectively 24.28 g x kg(-1) and 48.55 g x kg(-1)), each group have ten rats. Drugs were diluted with an equal dose of normal saline. The rats of sham group and model group were injected equivalent dosage of saline. The myocardial infarction size and the contents of serum cTnT and CK-MB were detected. The level of TXB2, 6-keto-PGF(1alpha) and platelet aggregation in blood plasma were investigated.

RESULTCompared with sham group, serum cTnT and CK-MB contents in model group increased significantly (P < 0.01). Compared with model group, myocardial infarction size and serum cTnT and CK-MB contents in aqueous effective component of S. miltiorrhiza group, aqueous effective component of C. tinctorius group and aqueous effective components compatibility of S. miltiorrhiza and C. tinctorius groups decreased significantly. Aqueous effective component of S. miltiorrhiza increased the level of 6-ke-to-PGF(1alpha), as well as decreased content of TXB2 and inhibited platelet aggregation (P < 0.01). Aqueous effective component of C. tinctorius also decreased the content TXB2 (P < 0.01). Improved extent of some detected markers in aqueous effective components compatibility of S. miltiorrhiza and C. tinctorius groups were better than that of Danhong injection group.

CONCLUSIONEffective components compatibility of aqueous extracts from S. miltiorrhiza and C. tinctorius may reduce myocardial infarct size and leakage of myocardial enzyme, and increase the level of 6-keto-PGF1alpha, so as to inhibit platelet aggregation and prevent thrombosis, the result of which is to reduce myocardial ischemic reperfusion injury.

Animals ; Carthamus tinctorius ; chemistry ; Disease Models, Animal ; Drug Interactions ; Drugs, Chinese Herbal ; therapeutic use ; Female ; Humans ; Male ; Myocardial Reperfusion Injury ; drug therapy ; Rats ; Rats, Sprague-Dawley ; Salvia miltiorrhiza ; chemistry

Objective:To explore the diagnostic value of laboratory examination in bronchoalveolar lavage fluid(BALF) for interstitial lung disease (ILD) and its application value in assessing the degree of fibrosis in the disease.Methods:Retrospective analysis. The clinical data of ILD patients treated in Shanghai First People′s Hospital from January 1, 2021 to December 31, 2023[104 cases, male︰female=48︰56, (62.79±1.24) years] were collected. According to the imaging scores, they were divided into a mild fibrosis ILD group [53 cases, male︰female=26︰27, (61.32±1.71) years] and a moderate to severe ILD fibrosis group [51 cases, male︰female=22︰29, (64.31±1.88) years]. Patients with community-acquired pneumonia without fibrotic lesions by HRCTduring the same period were selected as the control group [49 cases, male︰female=25︰24, (65.37±1.65)years]. The clinical information of all study subjects, as well as BALF lymphocyte subset analysis, cytokine and cytology count detection results were collected. Furthermore, the Kruskal-Wallis H test was used to screen the differential indexes, and the receiver operating characteristic (ROC) curve was used to evaluate the differential indexes to assess the degree of ILD pulmonary fibrosis.Results:Compared with the non-fibrotic pneumonia group, IL-6, IL-8, CD4+CD45RO+cells and macrophages (M%) were significantly upregulated in the mild fibrosis ILD group (P<0.05), and significantly higher in the moderate to severe fibrosis ILD group ( P<0.05). Compared with the non-fibrotic pneumonia group, IL-1β and white blood cell (WBC) count were significantly upregulated only in the moderate to severe fibrotic ILD group ( P<0.05). The correction model was constructed by stepwise logistic regression analysis, and the differential indexes were combined, and the proportion of IL-1β+IL-6+IL-8+CD4+CD45RO+cells+macrophages was finally screened as the optimal combined diagnostic mode, with an area under the curve of 0.925, sensitivity of 92.3%, and specificity of 80.0%. Conclusion:Compared with the non-fibrotic pneumonia group, BALF-derived IL-1β, IL-6, IL-8, CD4+CD45RO+cells, WBC count and M% can be used as potential biomarkers to assess the degree of fibrosis, and the combination of IL-1β+IL-6+IL-8+CD4+CD45RO+cells+macrophages has a better diagnostic efficacy for moderate to severe fibrotic ILD.

A porous composite particle (CP) was fabricated by the methods of emulsification and cross-link based on chitosan, alginate and collagen protein, and the tranexamic acid-loaded composite particles (TACP) was prepared by immersing the composite particle into the solution of tranexamic acid and by freeze drying. In the hepatic and splenic hemorrhage model of rabbits, CP and TACP were randomly used as haemostatic agents, and the Suxiaozhixuefen (Flashclot) was used as control. The corresponding hemostatic time and bleeding amount were observed respectively. The hemostatic time of CP and Flashclot were (2.48 +/- 0.88) min and (3.07 +/- 0.84) min, respectively, no significant difference was observed. However, the hemostatic time of TACP was (1.90 +/- 0.75) min, which was significantly shorter than that of CP and Flashclot (P < 0.05). In the splenic bleeding model of rabbits, similar results were obtained with these three kinds of hemostatics. These results indicated that the CP based on chitosan, alginate and collagen protein displayed similar hemostatic efficiency to Flashclot. However, the TACP might be one of promising haemostatic powders due to its more excellent hemostatic efficiency.
Alginates ; administration & dosage ; pharmacology ; Animals ; Biocompatible Materials ; chemistry ; Chitosan ; administration & dosage ; pharmacology ; Collagen ; administration & dosage ; pharmacology ; Female ; Hemostatics ; administration & dosage ; pharmacology ; Male ; Rabbits ; Tranexamic Acid ; administration & dosage ; pharmacology

This paper, based on relevant research data with regard to ICU patients who received vasoactive drugs, summarizes the risks, contributory factors and precautionary measures of vasoactive drugs-related adverse events, with the hope that they will draw the attention of healthcare workers. By knowing the knowledge of vasoactive drugs, contributory factors of adverse events and proper use of micro-injection pump, nurses can prevent and reduce such adverse events and improve the prognosis of patients.

Objective To investigate the epidemiological information of patients in pre-hospital medical care for our large and medium-sized cities and probe the patients' characteristic. Method The data in 2008 were exported from the computer databases of 8 large and medium-sized cities' emergency medical centers in our country.The thorough records of data were conducted to statistical analysis. Results ( 1 ) The scheduling time, running time, rescue time, returning time, total time and service radius in the pre-hospital medical care group were 2.16± 1.10(min), 14.01 ±6.82(min), 12.12±5.96(min), 14.08± 6.85(min), 42.34± 20.21(min)and 8.50±4.18(km), and the above parameter in the non-death group were 2.19 ± 1.13(min), 14.15 ± 7.14(min),11.60±6.72(min), 14.92 ±6.89(min), 41.86± 19.53(minutes) and 8.63±4.31(Km), and the above parameter in the death group were 2.10± 1.08(min), 13.68 ± 7.14(min), 25.25 ± 12.34(min), 13.75±6.48(min), 54.74 ± 25.47(min) and 7.86± 3.91(Km), and the above parameter in the non-sudden cardiac death group were2.09± 1.03(min), 13.58±6.78(min), 25.53± 12.34(min), 13.60± 6.54(min), 53.79±23.77(min) and 7.67 ± 3.86(Km), and the above parameter in the sudden cardiac death group were 2.12 ±1.02(min), 14.10±7.05(min), 24.79± 12.08(min), 13.79±6.61(min), 54. 80 ± 25. 36( min) and 7.90±3.92(Km) respectively. The scheduling time, running time, returning time and service radius in the death group were less than those of the non-death group, but the rescue time and total time of the former were more than those of the latter respectively ( P ＜ 0.05 or P ＜ 0. 001 ). The scheduling time and returning time didn' t have significant difference between the sudden cardiac death group and the non-sudden cardiac death group respectively ( P ＞ 0.05), but the running time, total time and service radius of the sudden cardiac death group were more than those of the non-sudden cardiac death group, and the rescue time of the former was less than that of the latter respectively ( P ＜ 0.05 or P ＜ 0.001 ). (2)The patients' amount in pre-hospital medical care group, the non-death group, the death group, the non-sudden cardiac death group and the sudden cardiac death group were at most in first quarter, and the least time slice of patients' amount were 4:00～ 6:00, 4:00～6:00, 4:00～ 6:00, 22:00～ 24:00, 2:00～4:00 respectively, and the most time slice of patients' amount were 20:00～ 22:00, 20:00～22:00, 8:00～ 10:00, 2:00 ～ 4:00, 8:00 ～ 10:00 respectively. (3)In 241 876 cases of pre-hospital medical care group, the patients' amount of trauma was at most, whose age grades was by far among21 ～50, and the others in sequence were nervous system, circulatory system, other group, digestive system, respiratory system and poisoning group respectively, whose age grades in nervous system, circulatory system and respiratory system was by far above 51, especially above 70. The patients' age grades in other group and digestive system had two climax age groups, which the one was 21 ～ 30, and the other was above 70. The patients' age grades in poisoning group was by far among 21 ～ 50, which the patients' amount of acute alcoholism was at the most. (4) In 12 568 cases of death group, the death amount of circulatory system, other group, respiratory system, nervous system and digestive system ranked at the lst,2nd,4th,5th 8th respectively, whose age grades was by far above 51, especially above 70,and the patients' amount of sudden cardiac death was at the most in the death amount of circulatory system. The death amount of trauma and poisoning group ranked at the 3rd, 6th respectively, whose age grades was by far among 21 ～ 50. (5)The total amount, the death amount and the sudden cardiac death amount of male patients were more than those of female patients. (6)The percentage of the death group to the pre-hospital medical care group was 5.20%, and the percentage of the sudden cardiac death group to the pre-hospital medical care group was 1.29%,and the percentage of the sudden cardiac death group to the death group was 24.87 %, and the percentage of the sudden cardiac death group to the circulatory system group was 67.33 %. Conclusions ( 1 )The trauma and the sudden cardiac death are the overriding reason of disease and the overriding reason of death in our large and medium-sized cities respectively. (2) It is very important to cut the death rate of the middle-old age patients by strengthening prevention and cure of cardiovascular and cerebrovascular diseases, discerning the critical illness early and improving the level of pre-hospital medical care. (3)It is a strong method to decrease the total amount and the death amount of the trauma, especially in traffic accident, by strengthening safety in production, observing traffic regulation and enhancing the legal awareness.

[摘 要] 目的：基于CRISPR/Cas9基因编辑技术制备无内源TCR的TCR-T细胞并鉴定其在体外杀伤HPV16阳性宫颈癌SiHa细胞的功能。方法：培养健康志愿者外周血CD8+ T细胞和Jurkat细胞，CRISPR/Cas9基因编辑技术敲除CD8+ T、Jurkat细胞的TCR基因，制备过表达转基因TCR的重组慢病毒，在敲除内源性TCR的CD8+ T和Jurkat细胞中用慢病毒过表达转基因TCR制备TCR-T细胞，多色FCM检测TCR-T细胞中TCR和CD3的表达水平，荧光素酶活性实验检测TCR-T细胞对HPV16阳性SiHa细胞的杀伤效率。结果：CRIPSR/Cas9基因编辑技术高效地敲除了外周血CD8+ T细胞和Jurkat细胞中的TRAC和TRBC基因，敲除效率分别为（81.4±4.5）%、（98.5±0.07）%，制备的无内源TCR的TCR-T细胞高效表达转基因TCR，在外周血CD8+ T和Jurkat细胞中表达率为（66.0±17.8）%、（97.3±2.6）%，敲除内源TRAC和TRBC基因有效增强CD8+ T和Jurkat细胞膜表达转基因TCR（均P<0.01），敲除内源TCR增强TCR-T细胞特异性杀伤HPV16阳性的SiHa细胞[（71.4±1.0）% vs （35.1±2.0）%，P<0.01）]。结论：无内源TCR的TCR-T细胞显著增强转基因TCR的表达和对HPV16阳性宫颈癌SiHa细胞的靶向杀伤能力，为提高TCR-T细胞的临床疗效提供了实验依据。

Objective:To develop an objective structured clinical examination (OSCE) case base suitable for emergency nursing team training, and evaluate the quality of the case base.Methods:From June to August 2021, based on the literature research, we initially prepared the OSCE case base for emergency nursing team training through the discussion of the research group. From September to December 2021, eight experts were selected for expert group discussion, and the case base were revised and improved according to expert opinions to form a standardized OSCE case base for emergency nursing team training. The quality of cases and case base were evaluated by consulting experts.Results:The effective recovery rate of expert consultation questionnaire was 100%, and the expert authority coefficient was 0.913. A total of 32 OSCE training cases for emergency nursing team were formed. Each case included six parts, namely, training objectives, training content, training preparation, standardized patient information and plot content, scenario evolution diagram, and references. The quality evaluation score of 32 cases was (44.50±1.85) , with the lowest score 40 and the highest score 48. The case base quality evaluation score was (45.26±0.35) , with the lowest score 42 and the highest score 47.Conclusions:The overall quality of the compiled OSCE case base for emergency nursing team training is high, which is suitable for emergency nursing team training.

Objective:To establish a colloidal gold technique assay for the rapid detection of immunoglobulin(Ig)M and IgG antibodies against 2019 novel coronavirus (2019-nCoV) and to evaluate its clinical performance.Methods:A total of 278 patients who were respectively treated at Wuhan Hankou Hospital and the People′s Hospital of Honghu from February 12, 2020 to February 20, 2020 were collected. According to the diagnostic criteria, 89 patients were confirmed with positive 2019-nCoV nucleic acid, and 189 were 2019-nCoV nucleic acid-negative suspected patients. A total of 273 medical examiners from Nanfang Hospital, Southern Medical University from 2015 to 2018 were selected as controls. The serum samples of patients were collected. 2019-nCoV nucleic proteins were obtained from prokaryotic expression vectors. Indirect IgM and IgG colloidal gold techniques were established by using recombinant nuclear protein. 2019-nCoV nucleic acid detection by reverse transcription-polymerase chain reaction (RT-PCR) was used as control. Serum specimens were tested for 2019-nCoV IgM and IgG. The specificity and sensitivity of colloidal gold assay were analyzed.Results:The positive rates of IgM and IgG with the colloidal gold detection in confirmed patients with positive 2019-nCoV nucleic acid were 78.7%(70/89) and 73.0%(65/89), respectively. The positive rates of IgM and IgG in medical examiners were 1.8%(5/273) and 0.7%(2/273), respectively. The sensitivity and specificity of IgM detection reagents were 78.7% and 98.2%, respectively, those of IgG detection reagents were 73.0% and 99.3%, respectively, and those of IgM combined with IgG detection were 87.6% and 98.2%, respectively. For suspected patients with negative 2019-nCoV nucleic acid, the positive rates of IgM and IgG were 59.8%(113/189) and 52.9%(100/189), respectively, and the positive rate of IgM combined with IgG detection was 66.1%(125/189).Conclusion:This reagent of 2019-nCoV antibodies detection (colloidal gold technique) fulfills the requirement for clinical application with high specificity and sensitivity, which can be served as a supplementary detection method for 2019-nCoV nucleic acid detection by RT-PCR.

Objective: To establish a colloidal gold technique assay for the rapid detection of immunoglobulin(Ig) M and IgG antibodies against 2019 novel coronavirus (2019-nCoV) and to evaluate its clinical performance. Methods: A total of 278 patients who were treated at Wuhan Hankou Hospital and the People's Hospital of Honghu from February 12, 2020 to February 20, 2020 were collected. According to the diagnostic criteria, 89 patients were confirmed with 2019-nCoV nucleic acid positive diagnosis, and 189 were 2019-nCoV nucleic acid-negative suspected patients. A total of 273 medical examiners from Nanfang Hospital, Southern Medical University from 2015 to 2018 were selected as controls. The serum samples of patients were collected. 2019-nCoV nucleic proteins were obtained from prokaryotic expression vectors. Indirect IgM and IgG colloidal gold techniques were established by using recombinant N protein. 2019-nCoV nucleic acid detection by reverse transcription-polymerase chain reaction (RT-PCR) was used as control. Serum specimens were tested for 2019-nCoV IgM and IgG. The specificity and sensitivity of colloidal gold assay were analyzed. Results: The sensitivity and specificity of IgM detection reagents were 78.7% and 98.2%, respectively, those of IgG detection reagents were 73.0% and 99.3%, respectively, and those of IgM combined with IgG detection were 87.6% and 98.2%, respectively. For suspected patients with negative 2019-nCoV nucleic acid, the positive rates of IgM and IgG were 59.8% (113/189) and 52.9% (100/189), respectively, and the positive rate of IgM combined with IgG detection was 66.1% (125/189). Conclusion This reagent of 2019-nCoV antibodies detection (colloidal gold technique) fulfills the requirement for clinical application with high specificity and sensitivity, which can be served as a supplementary detection method for 2019-nCoV nucleic acid detection by RT-PCR.