Analysis of alterations in early postoperative pulmonary bacterial microbiome characteristics in lung transplant recipients
10.3760/cma.j.cn421203-20230515-00104
- VernacularTitle:肺移植受者术后早期肺内细菌菌群特征变化分析
- Author:
Yalan YANG
1
;
Xiaohua WANG
;
Chen YAO
;
Yuhang CAI
;
Dong XIANG
;
Xin XU
;
Chunrong JU
Author Information
1. 广州医科大学附属第一医院 器官移植科，广州 510120
- Keywords:
Lung transplantation;
Bacterium;
Biodiversity
- From:
Chinese Journal of Organ Transplantation
2023;44(11):653-661
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To explore the abundance, diversity, and structural changes of early postoperative pulmonary bacterial microbiota in lung transplant recipients.Methods:Recruiting 40 recipients who underwent lung transplantation surgery at the First Affiliated Hospital of Guangzhou Medical University from October 2020 to May 2022 for the study.All recipients did not receive antibiotic treatment within 4 weeks prior to surgery, and all recipients received a unified immunosuppressive and anti infection regimen after surgery.The bronchoalveolar lavage fluid(BALF) was collected from the amputated lung in vitro before the transplantation for 16S ribosomal RNA sequencing and flora analysis.BALF was also collected at the scheduled time from the transplanted lung on the 7th, 14th and 30th days post transplantaion for analysis.Results:The study included a total of 40 recipients who did not receive antibiotic treatment within 4 weeks before surgery, including 35 males.Among the study participants, there were 14 cases of primary obstructive pulmonary disease, 19 cases of interstitial lung disease, 3 cases of occupational lung disease, and 4 others.Microbiome in BALF of transplanted and detached autologous lungs at the first week after surgery α( P<0.05) and β diversity is statistically significant( R2=0.08, P=0.001), and the bacterial community in the transplanted lungs α Diversity is lower than that of explant lungs.Starting from the second week after surgery, the richness and species diversity of the transplanted lung microbiota gradually increase.The bacterial structure was also changed with postoperative time, and the relative abundance of the same bacterial species were varied at different time points.The bacterial community in BALF was mainly dominated by Proteobacteria both explant lungs and transplant lungs.The relative abundance of Staphylococcus and Acinetobacter genera at the BALF in transplanted lungs was higher than that in explant lung samples, but their relative abundance decreased over time after surgery. Conclusions:The α diversity of the early postoperative pulmonary microbiota after lung transplantation was lower than that of the amputated autologous lung, and the bacterial richness and species diversity in the microbiota of the transplanted lung gradually increased at the second week after the transplantation.The bacterial microbiota of the transplanted lung is changed complicatedly with time.
