1.The protective effects and potential mechanisms of Chinese herbal medicines on acute lung injury/acute re-spiratory distress syndrome
Lian DUAN ; Yitao WEI ; Manling LIU ; Zhichao LI
Journal of Medical Postgraduates 2016;29(5):533-537
There has been no specific therapeutic measures for acute lung injury /acute respiratory distress syndrome ( ALI/ARDS) , a disease of high fatality rate.Besides having good curative effects for the cardiovascular system diseases, cancer, obesity and preventing aging, traditional Chinese herbal medicines also have obvious therapeutic effects on ALI/ARDS.In this paper, we summari-zes the protection and the underlying mechanisms of traditional Chinese herbal medicines on ALI/ARDS.
2.Analysis of Composition and Medication Regularities of Prescriptions for Treatise on Febrile Diseases Based on TCM Inheritance Platform System(V2.5)Software
Yanmei SHI ; Qingrui ZHANG ; Jiajun DUAN ; Lei ZHANG ; Yitao XUE
China Pharmacy 2016;27(16):2296-2297,2298
OBJECTIVE:To investigate the composition and medication regularities of prescriptions for Treatise on Febrile Dis-eases. METHODS:The prescriptions included in Treatise on Febrile Diseases were collected and inputted into TCM inheritance platform system(V2.5)software,and prescription database was established. The medication and the compatibility regularity of pre-scriptions were excavated using the function of software integration. RESULTS & CONCLUSIONS:83 kinds of TCM involved in 112 prescriptions ranked by frequency,among which 24 ingredients were used more than 4 times. Commonly used TCM groups were summarized to evolve 16 key groups and 8 new prescriptions. Four properties of TCM are mainly the property of“Wen and Han”,and five tastes mostly are“Sweet,Bitter,Spicy”. TCM with the property of“Wen and Sweet”taste are more than those with the property of“Wen and Spicy”,and TCM acting on spleen are more than those acting on lung.
3.Molecular features and drug-resistance genes of 70 erythromycin-resistant group B Streptococcus strains in Zhengzhou
Shuhong TAI ; Yitao DUAN ; Jing YU ; Sijia PAN ; Enwu YUAN
Chinese Journal of Microbiology and Immunology 2023;43(12):901-907
Objective:To investigate the phenotypes, molecular types and drug-resistance genes of erythromycin (ERY)-resistant group B Streptococcus (GBS) in pregnant women in late pregnancy in Zhengzhou and provide basic data for the prevention, control and treatment of GBS infection. Methods:This study retrospectively collected 86 GBS strains isolated from the vaginal secretions of pregnant women in late pregnancy at Maternal and Child Health Hospital of Henan Province from 2021 to 2022. ERY-resistant GBS strains were selected using the ERY disk diffusion method, and their susceptibility to 10 different antibiotics was tested. Whole-genome sequencing was performed to analyze their molecular features including molecular types, clonal complex groups and drug-resistance genes. Drug-resistance genes carried by GBS strains belonging to different clonal complex groups were compared.Results:There were 70 ERY-resistant GBS strains. Among them, 7.14%(5/70) exhibited an inducible resistance phenotype to macrolide-lincosamide-streptogramin B (MLSB) antibiotics; 84.29%(59/70) showed constitutive resistance to MLSB antibiotics; 8.57%(6/70) were resistant to macrolides but susceptible to lincosamides. The resistance rates of these strains to clindamycin (CLI), tetracycline (TE) and levofloxacin (LEV) were 91.43%(64/70), 54.29%(38/70) and 60.00%(42/70), respectively. These ERY-resistant strains exhibited multidrug resistance patterns with 40.00%(28/70) showing ERY-CLI-LEV resistance phenotype and 30.00%(21/70) showing ERY-CLI-TE resistance phenotype. The major drug-resistance genes carried by the 70 GBS strains were macrolide/lincosamide resistance genes mreA (100.00%) and ermB (53/70, 75.71%), aminoglycoside resistance genes ant (6)-Ⅰ a (22/70, 31.43%) and aph(3′)-Ⅲ (18/70, 25.71%), and tetracycline resistance genes tetM (22/70, 31.43%) and tetO (13/70, 18.57%). These strains belonged to 12 sequence types derived from seven clonal complexes (CCs) and 48.57%(34/70) of them were clustered into CC12. All CC12 strains harbored ermB, but none carried ermA. The positive rates of lsaE, lunB, and aac (6′)- aph(2" ) in CC19 and CC651 strains, ant (6)-Ⅰ a in CC651 and CC452 strains, and mefA and msrD in CC19 and CC23 strains were significantly higher than those in CC12 strains ( P<0.001). Conclusions:ERY-resistant GBS in Zhengzhou exhibited diverse drug resistance phenotypes and molecular types. CC12 was the most prevalent clonal complex in this region. The constitutive MLSB resistance phenotype and ermB gene were the most common ERY resistance phenotype and genotype, respectively, and tetM gene was related to tetracycline resistance. Furthermore, the drug-resistance genes varied in GBS strains of different clonal complexes. This study suggested that close attention should be paid to the epidemiological situation of GBS in this region and the effectiveness of antibiotics used for clinical prevention and treatment of GBS infection should be carefully evaluated.