浙江农业学报 ›› 2026, Vol. 38 ›› Issue (8): 1551-1562.DOI: 10.3969/j.issn.1004-1524.20250483
陈沁楠1,2(
), 陶文扬2, 周万怡2, 王梦竹2, 邢建荣2, 王建成3, 杨颖2,*(
), 邓尚贵1,*(
)
收稿日期:2025-07-14
出版日期:2026-08-25
发布日期:2026-09-14
作者简介:陈沁楠,研究方向为天然活性物质对急性肺炎的保护作用。E-mail:15157672779@163.com
通讯作者:
*邓尚贵,E-mail:dengshanggui@163.com;杨颖,E-mail:yangying_sps@163.com
基金资助:
CHEN Qinnan1,2(
), TAO Wenyang2, ZHOU Wanyi2, WANG Mengzhu2, XING Jianrong2, WANG Jiancheng3, YANG Ying2,*(
), DENG Shanggui1,*(
)
Received:2025-07-14
Published:2026-08-25
Online:2026-09-14
摘要:
为探究宁海白枇杷叶水提物对急性肺炎的保护作用及其机制,采用脂多糖(lipopolysaccharide, LPS)诱导小鼠急性肺炎模型,进行细胞活力检测、肺组织病理学观察、湿/干重比(W/D)测定、氧化应激和炎症因子水平检测,并通过16S rRNA测序分析肠道菌群变化。结果表明,枇杷叶水提物以剂量依赖性方式缓解LPS诱导的肺泡上皮细胞损伤;枇杷叶水提物(200、400 mg·kg-1)预处理对LPS诱导的小鼠脏器系数无显著影响,可显著(p<0.01)降低小鼠肺组织W/D,减轻肺泡壁增厚、炎症细胞浸润等病理损伤,肺组织中丙二醛(malondialdehyde, MDA)含量和超氧化物歧化酶(superoxide dismutase, SOD)活性无显著变化,降低髓过氧化物酶(myeloperoxidase, MPO)活性和促炎因子IL-1β、IL-6、TNF-α水平,提高谷胱甘肽过氧化物酶(glutathione peroxidase, GPx)活性。肠道菌群分析显示,枇杷叶水提物可改善LPS引起的菌群紊乱,提高芽孢杆菌门相对丰度,降低拟杆菌门相对丰度,并增加有益菌异杆菌属(Allobaculum)、回肠杆状菌属(Ileibacterium)和安德克氏菌属(Adlercreutzia)的相对丰度。综上,宁海白枇杷叶水提物对LPS诱导的小鼠急性肺炎具有保护作用,其机制可能与抑制氧化应激和炎症反应、调节肠道菌群平衡有关。
中图分类号:
陈沁楠, 陶文扬, 周万怡, 王梦竹, 邢建荣, 王建成, 杨颖, 邓尚贵. 宁海白枇杷叶水提物通过抗炎和调控肠道菌群缓解小鼠急性肺炎[J]. 浙江农业学报, 2026, 38(8): 1551-1562.
CHEN Qinnan, TAO Wenyang, ZHOU Wanyi, WANG Mengzhu, XING Jianrong, WANG Jiancheng, YANG Ying, DENG Shanggui. Aqueous extract of Ninghai Bai loquat leaf mitigates LPS-induced acute pneumonia in mice via anti-inflammatory and gut microbiota modulation[J]. Acta Agriculturae Zhejiangensis, 2026, 38(8): 1551-1562.
图1 枇杷叶水提物对LPS诱导的A549细胞损伤的保护作用 A,A549细胞经不同浓度LPS处理24 h;B, A549细胞经不同浓度枇杷叶水提物孵育24 h;C,不同浓度枇杷叶水提物和LPS处理A549细胞24 h后用CCK-8法检测细胞活力。图A中,*和**分别表示与0 μg·mL-1处理相比,在p<0.05和p<0.01水平上差异显著。图C中,####表示与空白组(NC)相比,在p<0.000 1水平上差异显著;*和**分别表示与模型组(LPS)相比,在p<0.05、p<0.01水平上差异显著。
Fig.1 Protective effects of loquat leaf aqueous extract on LPS-induced injury in A549 cells A, A549 cells were incubated with LPS at different mass concentrations for 24 h; B, A549 cells were incubated with aqueous extract of loquat leaf at different mass concentrations for 24 h; C, A549 cells were incubated with loquat leaf aqueous extract and/or LPS at different mass concentrations for 24 h and the cell viability was measured using the CCK-8 assay. In panel A, * and ** indicate significant differences at the p<0.05 and p<0.01 levels, respectively, compared with the 0 μg·mL-1 treatment. In panel C, #### indicates significant differences at the p<0.000 1 level compared with the blank control(NC) group; * and ** indicate significant differences at the p<0.05 and p<0.01 levels, respectively, compared with the model (LPS) group.
图2 枇杷叶水提物对急性肺炎小鼠体重、脏器系数和肺温/干重比的影响 #、##分别表示与空白组(NC)相比p<0.05、p<0.01;*、**和****分别表示与模型组(LPS)相比p<0.05、p<0.01和p<0.000 1。
Fig.2 Effects of loquat leaf aqueous extract on body weight, organ coefficient and lung wet-to-dry weight ratio in mice with acute pneumonia # and ## indicate p<0.05 and p<0.01, respectively, compared with the blank control (NC) group; *, ** and **** indicate p<0.05, p<0.01 and p<0.000 1, respectively, compared with the model (LPS) group.
图3 HE染色观察各组小鼠肺组织的病理学改变 A,健康对照(NC)组;B,LPS组;C,5 mg·kg-1地塞米松组;D,200 mg·kg-1枇杷叶水提物组;E,400 mg·kg-1枇杷叶水提物组。黑色三角形指示细支气管;蓝色箭头指示炎症细胞浸润;绿色箭头指示肺泡腔扩张或融合;黑色箭头指示肺泡间隔增厚或透明膜形成;比例尺:50 μm(物镜放大倍数为20×)。
Fig.3 Histopathological assessment of pulmonary lesions by HE staining across experimental groups A, Healthy control (NC) group; B, LPS-induced pneumonia model group; C, 5 mg·kg-1 dexamethasone treatment group; D, 200 mg·kg-1 aqueous extract of loquat leaf treatment group; E, 400 mg·kg-1 aqueous extract of loquat leaf treatment group. Key morphological indicators: ▲, Bronchiolar epithelium; Blue, Inflammatory cell infiltration (predominantly neutrophils); Green, Alveolar space dilation with septal fusion; Black, Hyaline membrane formation and interstitial thickening. Scale bar: 50 μm (20× objective magnification).
图4 枇杷叶水提物对LPS诱导的急性肺炎小鼠的保护作用 #、##、###和####分别表示与空白(NC)组相比p<0.05、p<0.01、p<0.001、p<0.000 1;*、**、***和****表示与模型组(LPS)相比p<0.05、p<0.01、p<0.001、p<0.000 1。
Fig.4 Protective effects of loquat leaf aqueous extract on LPS-induced acute pneumonia in mice #, ##, ### and #### indicate p<0.05, p<0.01, p< 0.001 and p<0.000 1, respectively, compared with the blank(NC) group; *, **, *** and **** indicate p<0.05, p<0.01, p<0.001, and p<0.000 1, respectively, compared with the model(LPS) group.
图5 枇杷叶水提物对LPS诱导的急性肺炎小鼠肠道菌群的影响(门水平) A,Venn图(97%相似性截断值);B,基于PCoA的β多样性分析(Bray-Curtis距离);C,肠道菌群失调指数(取常用对数);D,门水平上物种注释条形图;E,芽孢杆菌门的相对丰度;F,拟杆菌门的相对丰度;G,疣微菌门的相对丰度;H,放线菌门的相对丰度。##,与NC组相比p<0.01。图B采用PERMANOVA检验;图C~图H采用Kruskal-Wallis检验。
Fig.5 Effects of loquat leaf aqueous extract on the gut microbiota in mice with LPS-induced acute pneumonia (phylum level) A, Venn diagram (97% similarity cut-off); B, β-diversity analysis by PCoA (Bray-Curtis distance); C, Microbial dysbiosis index (MDI, converted by common logarithm); D, Phylum-level taxonomic composition; E, Relative abundance of Bacillota; F, Relative abundance of Bacteroidota; G, Relative abundance of Verrucomicrobiota; H, Relative abundance of Actinomycetota. ##, p<0.01 compared with the NC group. Figure B was analyzed using PERMANOVA; Figures C to H were analyzed using the Kruskal-Wallis test.
图6 枇杷叶水提物对LPS诱导的急性肺炎小鼠肠道菌群的影响(属水平) A,属水平物种注释条形图;B,异杆菌属的相对丰度;C,回肠杆状菌属的相对丰度;D,安德克氏菌属的相对丰度;E,单因素相关性网络图。
Fig.6 Effects of loquat leaf aqueous extract on the gut microbiota in mice with LPS-induced acute pneumonia(genus level) A, Genus composition; B, Relative abundance of Allobaculum; C, Relative abundance of Ileibacterium; D, Relative abundance of Adlercreutzia; E, Univariate correlation network diagram.
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