LUO Qian,FU Rui,PENG Bo,et al.16S rDNA Sequencing Reveals Effect of Tanreqing Injection on Pulmonary Flora in Rat Model of COPD[J].Chinese Journal of Experimental Traditional Medical Formulae,2024,30(23):98-103.
LUO Qian,FU Rui,PENG Bo,et al.16S rDNA Sequencing Reveals Effect of Tanreqing Injection on Pulmonary Flora in Rat Model of COPD[J].Chinese Journal of Experimental Traditional Medical Formulae,2024,30(23):98-103. DOI: 10.13422/j.cnki.syfjx.20240907.
16S rDNA Sequencing Reveals Effect of Tanreqing Injection on Pulmonary Flora in Rat Model of COPD增强出版
To study the effect of Tanreqing injection (TRQ) on the pulmonary flora in the rat model of chronic obstructive pulmonary disease (COPD).
Method
2
Wistar rats were randomized into control, model, and TRQ groups. The rats in other groups except the control group were treated by smoking combined with intratracheal instillation of lipopolysaccharide for the modeling of COPD. The TRQ group was intraperitoneally injected with TRQ (2 g·kg
-1
). At the end of the experiment, after blood collection from the abdominal aorta of the rats, the lung tissue was collected for hematoxylin-eosin and picric sirius red staining to reveal the pathological changes. The lung lavage fluid was collected, and the diversity and relative abundance of lung flora in different groups were analyzed by 16S rDNA amplicon sequencing.
Result
2
The lungs of the control group were normal, and those of the model group showed neutrophil infiltration, telangiectasia, lung hemorrhage and emphysema in individual cases, and thickening of collagen fibers in the trachea. Compared with the model group, the TRQ group showed significantly improved lungs and recovered collagen fibers. The MLI analysis showed that compared with the control group, the model group showcased increased alveolar space (
P
<
0.01), which was reduced in the TRQ group (
P
<
0.05). Compared with the control group, the model group showed increased wall thickness (
P
<
0.01), and the increase was attenuated in the TRQ group (
P
<
0.01). TRQ increased the Simpson index and altered the
α
diversity of pulmonary flora. The results of principal co-ordinate analysis showed that TRQ changed the
β
di
versity and reduced the
β
diversity index of pulmonary flora. At the genus level, the model group showed increased relative abundance of
g_Bacillus
and
g_Brevundimonas
and decreased relative abundance of
g_Pseudomonas
, compared with the control group. After treatment with TRQ, the relative abundance of
g_Stenotrophomonas
increased, and that of
g_Bacillus
decreased. The LEfSe of differential taxa between groups showed that the modeling increased the relative abundance of
g_Lachnospiraceae_NK4A136_group
, and TRQ treatment increased the relative abundance of
g_Rhodococcus
and
g_Stenotrophomonas
.
Conclusion
2
TRQ can regulate the diversity of pulmonary flora and restore the balance of bacterial genera in the rat model of COPD, which may be one of the mechanisms of the prevention and treatment of COPD with TRQ.
关键词
Keywords
references
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