


1. Time-Dependent Transcriptional Heterogeneity of Neutrophils in the Infarcted Heart
作者取了MI后day 1, 3, 5天的心臟,使用流式分選了CD11b+細(xì)胞,進(jìn)行了單細(xì)胞轉(zhuǎn)錄組+CITEseq。作者對(duì)其中的中性粒細(xì)胞進(jìn)行了亞群細(xì)分,得到了6個(gè)亞群。其中day1主要是Neutro4群,day3時(shí)Neutro1群增加,day5時(shí)Neutro3群增加,每一群都有自己獨(dú)特的轉(zhuǎn)錄模式和轉(zhuǎn)錄因子。


2. SiglecFhi Neutrophils Time-Dependently Populate the Infarcted Heart
和MI后Day1的中性粒相比,day3和day5的中性粒高表達(dá)Siglecf,尤其是Neutro1和Neutro3群(這兩群在day1時(shí)很少)。對(duì)day1和day3 SiglecF的流式檢測(cè)(b-d)和免疫熒光染色(e)得到了一致的結(jié)果。此外,作者檢測(cè)了SiglecFhi 和 SiglecFlow中性粒細(xì)胞的功能。結(jié)果顯示MI后3天,SiglecFhi的吞噬功能更強(qiáng)(f),ROS的產(chǎn)生也更強(qiáng)(g)。day1時(shí)吞噬和ROS產(chǎn)生都差不多。
而在day5時(shí),中性粒總數(shù)顯著下降,但SiglecFhi中性粒依然占了一半左右(附件流式結(jié)果)。

3.Acquisition of SiglecF Parallels Acquisition of Aging and Activation Markers
同時(shí),SiglecF的表達(dá)與中性粒細(xì)胞的aging/activation相一致。一些marker如Icam1, Itga4 (encoding CD49d), Cxcr4, Cxcr2 在SiglecFhi中性粒更高,而naive marker 如Sell,在SiglecFlow中性粒更高。


主要還是根據(jù)aging marker看的成熟度,感覺分化軌跡可能更客觀一點(diǎn)。
4. The SiglecFhi Neutrophil State Is Acquired via a local tissue specification process
為了探究SiglecFhi中性粒的起源,作者對(duì)MI后day 1, day 3和對(duì)應(yīng)con的外周血也進(jìn)行了檢測(cè)。外周血中性粒是Ly6G+CD115?(a)。對(duì)心臟和血液數(shù)據(jù)的整合提示血中存在3個(gè)主要細(xì)胞群:young neutrophils (Blood Young cluster: CD62Lhi, low Cxcr4), old blood neutrophils (Blood Old cluster: CD62Llow, high Cxcr4), type I IFN (interferon) response neutrophils (Neu-IFN)。
其中SiglecFneg和SiglecF+中性粒是心臟特有。SiglecFneg主要存在于MI后1天心臟,而SiglecF+中性粒主要存在于MI后3天心臟。

5. Relation of Heart-Infiltrating Neutrophils to Blood, BM, and Spleen Neutrophils
作者整合了心臟和外周血的數(shù)據(jù),進(jìn)行了擬時(shí)序分析。

6. Anti-Ly6G Antibodies Only Partially Deplete Heart Neutrophils and Induce a Local Shift Toward the SiglecFhi Phenotype

7. NicheNet Analysis of Neutrophil to Macrophage Communication Pathways

8. scRNA-Seq of Atherosclerotic Aortas Reveals Two Distinct Neutrophil Subsets
