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第45卷第10期
               ·1430 ·                           南 京    医 科 大 学 学         报                        2025年10月


              理盐水(normal saline,NS)处理56 d和SiO2处理56 d            结合密切相关(图 1D),其中与之关联的基因包括
              时的差异基因,并筛选出在 SiO2组中表达上调的前                         Ctss、Lgals3 和 Spp1。点图显示,Lgals3 在 SiO2 处理
              10 个基因,分别是 Ccl6、Lyz2、Ftl1、Spp1、Lgals3、            56 d组中的表达水平更高(图1E)。
              Cxcl2、Fth1、Psap、S100a9 和 Ctss(图 1C)。随后在           2.2  构建SiO2诱导的小鼠肺纤维化模型
              Metascape 网站对这些基因进行了基因本体(gene                          天狼星红染色结果显示,SiO2暴露组小鼠肺组
              ontology,GO)富集分析,通路分析结果显示与 ECM                    织中胶原纤维在支气管及肺泡间隔周围呈现显著
                 A
                                                  Ciliated cell
                                                                                 Macrophage⁃1
                                             AT2 cell⁃2                          Macrophage⁃2
                                         Clara cell
                               AT2 cell⁃1                                        Monocyte
                                                                                 T cell
                                                                   Fibroblast    B cell
                    10
                                                                                 Ig⁃producing B cell
                                                                                 Dendritic cell
                          Macrophage⁃2            Macrophage⁃1     AT1 cell      Neutrophil
                                                                                 NK cell
                                                                 Myofibroblast vascular  Endothelial cell⁃1
                               Dendritic cell
                                         Monocyte                smooth muscle cell  Endothelial cell⁃2
                                                                                 Fibroblast
                   UMAP_2  5                     Cycling basal cell              Myofibroblast vascular smooth musclc cell
                                                         Ig⁃producing B cell
                                                                                 Cycling basal cell
                                       Neutrophil
                                                                                 Ciliated cell
                                                                                 Clara cell
                                                                                 AT1 cell
                                                                  Ighat AT2 cell  AT2 cell⁃1
                                                         Endothelial cell⁃2      AT2 cell⁃2
                           NK cell
                                                                                 Ighat AT2 cell
                   -10
                                    T cell              B cell
                          -10        -5        0         5        10
                                               UMAP_1
                     B    1 000                                      C
                                                                               Psap
                                                                           Ctss S100a9  Fth1 Cxcl2 Lgals3 Spp1 Ftl1  Lyz2 Ccl6
                            750
                          Cell count  500


                            250                                          NS
                                                                                                Expression
                             0                                                                    2 1
                              NS_7 d NS_56 d SiO2_7 d SiO2_56 d          SiO2                     0 -1

                                                                                                  -2

              D                                                           E
                                         GO:0030593:Neutrophil chemotaxis
                                                                               NS_7 d
                                         GO:0050840:Extracellular matrix binding
                                         GO:0000323:Lytic vacuole                                  Percent expressed
                                         GO:0001664:G protein⁃coupled receptor binding  Split identity  NS_56 d  25%
                0  1  2  3  4  5  6  7  8                                      SiO2_7 d              50%
                                                                                                     75%
                          -lg(P)
                                                                              SiO2_56 d

                                                                                     Lgals3 Spp1 Ctss
                                                                                         Features
                 A:UMAP plot illustrating cell clustering. B:Bar plot showing changes in fibroblast cell counts across different groups. C:Heatmap showing the top
              10 upregulated genes in fibroblasts at 56 days. D:GO enrichment analysis of biological pathways. E:Dot plot displaying the expression of Lgals3,Spp1,
              and Ctss in fibroblasts.
                                           图1 成纤维细胞来源的LGALS3参与ECM结合
                                     Figure 1 Fibroblast⁃derived LGALS3 participated in ECM binding
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