Single cell atlas identifies lipid-processing and immunomodulatory endothelial cells in healthy and malignant breast.

Single cell atlas identifies lipid-processing and immunomodulatory endothelial cells in healthy and malignant breast.
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DOI:
10.1038/s41467-022-33052-y
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发表时间:
2022-09-20
影响因子:
16.6
通讯作者:
--
中科院分区:
综合性期刊1区
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由于缺乏乳腺癌 (BC) 中内皮细胞 (EC) 异质性的详细清单,这里我们对 9 名 BC 患者的 26,515 个细胞(包括 8433 个 EC)进行单细胞 RNA 测序,并将它们与已发表的肺肿瘤 EC 分类法进行比较。血管生成 EC 在表型上相似,而其他 EC 亚型则不同。预测性相互作用组分析揭示了 EC 和免疫细胞之间已知但之前未报道的受体-配体相互作用,表明乳腺 EC 亚型参与免疫反应。我们还鉴定了一种毛细血管 EC 亚型(LIPEC(脂质加工 EC)),该亚型表达参与脂质加工的基因,这些基因受 PPAR-γ 调节,并且在肿瘤周围乳腺组织中更为丰富。对 4648 名 BC 患者的回顾性分析表明,二甲双胍(一种间接 PPAR-γ 信号传导激活剂)治疗可提供持久的临床益处,并且与 LIPEC 丰度呈正相关。我们的研究结果值得进一步探索 LIPEC/PPAR-γ 与 BC 治疗的联系。肿瘤血管有助于癌症的生长、侵袭和转移。在这里,作者通过使用单细胞转录组学,报告了乳腺癌患者内皮细胞异质性的清单,包括表达参与脂质加工并受 PPAR-γ 调节的基因的亚型。
Since a detailed inventory of endothelial cell (EC) heterogeneity in breast cancer (BC) is lacking, here we perform single cell RNA-sequencing of 26,515 cells (including 8433 ECs) from 9 BC patients and compare them to published EC taxonomies from lung tumors. Angiogenic ECs are phenotypically similar, while other EC subtypes are different. Predictive interactome analysis reveals known but also previously unreported receptor-ligand interactions between ECs and immune cells, suggesting an involvement of breast EC subtypes in immune responses. We also identify a capillary EC subtype (LIPEC (Lipid Processing EC)), which expresses genes involved in lipid processing that are regulated by PPAR-γ and is more abundant in peri-tumoral breast tissue. Retrospective analysis of 4648 BC patients reveals that treatment with metformin (an indirect PPAR-γ signaling activator) provides long-lasting clinical benefit and is positively associated with LIPEC abundance. Our findings warrant further exploration of this LIPEC/PPAR-γ link for BC treatment. Tumor blood vessels contribute to cancer growth, invasion and metastasis. Here, by using single cell transcriptomics, the authors report an inventory of endothelial cell heterogeneity in patients with breast cancer, including a subtype that expresses genes involved in lipid processing and is regulated by PPAR-γ.
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