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这篇综述揭示了个体发育时序是小儿急性髓系白血病(AML)生物学和治疗反应的关键决定因素。研究利用新型人源化模型,系统阐述了造血干细胞(HSC)的个体发育阶段(从胎儿到成年)如何深刻影响NUP98::NSD1融合癌基因的致癌能力、白血病干细胞(LSC)的干性特征、谱系层级以及对治疗(如阿糖胞苷和menin抑制剂)的敏感性。研究表明,针对胎儿来源白血病细胞的特定代谢弱点(如氧化磷酸化OXPHOS)可为这种侵袭性疾病亚型提供新的治疗策略。
。结果发现,NUP98::NSD1阳性的FL来源HSPC克隆表现出强烈的选择性优势,在第四周时,NUP98::NSD1和NUP98::NSD1/WT1ko(WT1敲除)组中阳性克隆比例分别增至57%和89%。CB来源的HSPC也显示出类似的阳性选择趋势,但富集程度较低。相比之下,来自儿科和成人BM的NUP98::NSD1阳性克隆则没有显示出阳性选择的证据。单细胞染色质可及性基因分型(GoT-ChA)分析显示,在体外培养四周后,FL和CB来源的、经过NUP98::NSD1/WT1ko编辑的HSPC中,融合阳性细胞在最原始的巨核-红系祖细胞(MEP)簇中扩增
。转录因子(TF)基序富集分析表明,FL和CB编辑的HSPC显示出基本不同的TF富集模式,提示融合蛋白以发育阶段特异性的方式驱动不同的表达程序来启动白血病。
。结果显示,表达NUP98::NSD1的FL细胞表现出显著增强的自我更新能力。与对照FL异种移植物相比,NUP98::NSD1和NUP98::NSD1/WT1ko FL异种移植物的白血病起始细胞频率高出50倍以上。重要的是,次级FL NUP98::NSD1/WT1ko异种移植小鼠含有显著更高比例的CD34+CD117+干细胞和祖细胞,以及相对增加的CD19+淋巴样细胞,表明WT1缺失增强了干性并改变了谱系层级。
https://aacr.silverchair-cdn.com/aacr/content_public/journal/cancerdiscovery/16/3/10.1158_2159-8290.cd-25-0556/2/m_cd-25-0556_f3.png?Expires=1775464454&Signature=icFfMWdK9YPnCNTGK7NkirOtROlomRG-0R3Zy8eIQYgrEkCH1jylagKg~Otk9ZbgmI7Z2eb2Gq860ZWDM0cFwts1fQ5isQWjKuI4F4ooiUaLnBEwOR6BB3yFcwpPdbTz8mP3jzW6gpIKfahXER5Cw3Eeeb4wUMNSP5WK-j5ouDfon7zahdeZHrce2JydJ9CVU9stBR87RJ7rFnVSbw0PIKBb6y6HhdOKmq9vKWI1oSkqXk~t~x-135gSCky5cneSlvCHe8iTLNHlRcG9dN103JBRlWDo3hxgA~ehfaFzdNPrBsp56Qae9XwxXwH6QTEGO63oGhcJiX4s-xhR~TfRZw&Key-Pair-Id=APKAIE5G5CRDK6RD3PGA" caption="">https://aacr.silverchair-cdn.com/aacr/content_public/journal/cancerdiscovery/16/3/10.1158_2159-8290.cd-25-0556/2/m_cd-25-0556_f3.png?expires=1775464454&signature=icffmwdk9ypncntgk7nkirotrolomrg-0r3zy8eiqygrekch1jylagkg~otk9zbgmi7z2eb2gq860zwdm0cfwts1fq5isqwjkui4f4ooiualnbewor6bb3yfcwppdbtz8mp3jzw6gpikfahxer5cw3eeeb4wumnsp5wk-j5oudfon7zahdezhrce2jydj9cvu9stbr87rj7rfnvsbw0pikbb6y6hhdokmq9vkwi1oskqxk~t~x-135gscky5cneslvche8itlnhlrcg9dn103jbrlwdo3hxga~ehfafzdnprbsp56qae9xwxxwh6qtego63oghcjix4s-xhr~tfrzw&key-pair-id=apkaie5g5crdk6rd3pga" caption="single-cell profiling reveals developmentally regulated transcriptional and epigenetic programs in nup98::nsd1-driven aml. a, umap of merged scrna-seq reference, including normal and leukemic xenografts, categorized into 17 clusters. control, n = 2 biological replicates; nup98::nsd1, n = 4; wt1ko, n = 2; and nup98::nsd1/wt1ko, n = 3. b, contribution of each group to the merged scrna-seq umap. the red dotted box highlights lmpp/early gmps in the nup98::nsd1 and nup98::nsd1/wt1ko conditions. c, beeswarm plot comparing log fold changes in nearest neighbor cells from different cell type clusters computed with milo among nup98::nsd1 to control, nup98::nsd1/wt1ko to control, and nup98::nsd1/wt1ko to nup98::nsd1. significant neighborhoods identified at fdr <0.01 are indicated in color. d, mapping of scrna-seq for pdx #1 (nup98::nsd1, flt3-itd) and pdx #2 (nup98::nsd1, flt3-itd, wt1 mutation) onto the merged scrna-seq reference, displaying relative cell abundance density. e, umap of fl nup98::nsd1 and nup98::nsd1/wt1ko samples, by auc score for the lspc quiescent gene signature. higher auc scores (red) indicate stronger enrichment of the quiescent signature, whereas lower scores (blue) represent weaker enrichment. f, schematic experimental overview of the lda experiment with cd34+cd117+-enriched lscs and non-cd34+cd117+ cells sorted from fl nup98::nsd1 and nup98::nsd1/wt1ko xenografts. g, leukemia initiation stem cell frequency for cd34+cd117+ enriched lscs and non-cd34+cd117+ cells based on the lda approach described in f. , p <0.0001 using pearson’s χ2 test, n = 14–15 mice per condition (4–5 mice per dosage). h, mapping scrna-seq for cb nup98::nsd1/wt1ko onto the merged fl-derived scrna-seq reference, contoured with relative abundance density of cells. i, besswarm plot showing the log fold change comparing fl nup98::nsd1/wt1ko xenografts and cb nup98::nsd1/wt1ko xenografts for groups of nearest neighbor cells from different cell type clusters computed with milo. significant neighborhoods identified at an fdr <0.01 are indicated in color. n = 3 for fl nup98::nsd1/wt1ko and n = 2 for cb nup98::nsd1/wt1ko. j, bar plot showing significantly upregulated hallmark pathways in fl nup98::nsd1/wt1ko cells relative to cb nup98::nsd1/wt1ko in the lmpp/early gmp cluster. pathways marked with an asterisk () are statistically significant based on the cutoff p value <0.05. the x-axis represents −log10(p value), with higher values indicating greater statistical significance. k, umap of cb nup98::nsd1/wt1ko with cells colored by their auc score for the lspc quiescent signature using aucell. l, violin plots showing aucell enrichment scores for lspc quiescent (left) and lspc cycling (right) in lmpp/early gmps from fl nup98::nsd1/wt1ko and cb nup98::nsd1/wt1ko. wilcoxon rank-sum test. m, survival analysis of nsgs mice transplanted with fl- or cb-derived nup98::nsd1/wt1ko cells. survival was monitored over a 120-day observation period., p <0.0001 using the log-rank mantel生物通 版权所有