RESUMEN
Tumors growing in metabolically challenged environments, such as glioblastoma in the brain, are particularly reliant on crosstalk with their tumor microenvironment (TME) to satisfy their high energetic needs. To study the intricacies of this metabolic interplay, we interrogated the heterogeneity of the glioblastoma TME using single-cell and multi-omics analyses and identified metabolically rewired tumor-associated macrophage (TAM) subpopulations with pro-tumorigenic properties. These TAM subsets, termed lipid-laden macrophages (LLMs) to reflect their cholesterol accumulation, are epigenetically rewired, display immunosuppressive features, and are enriched in the aggressive mesenchymal glioblastoma subtype. Engulfment of cholesterol-rich myelin debris endows subsets of TAMs to acquire an LLM phenotype. Subsequently, LLMs directly transfer myelin-derived lipids to cancer cells in an LXR/Abca1-dependent manner, thereby fueling the heightened metabolic demands of mesenchymal glioblastoma. Our work provides an in-depth understanding of the immune-metabolic interplay during glioblastoma progression, thereby laying a framework to unveil targetable metabolic vulnerabilities in glioblastoma.
RESUMEN
CCCTC-binding factor (CTCF) and cohesin are key players in three-dimensional chromatin organization. The topologically associating domains (TADs) demarcated by CTCF are remarkably well conserved between species, although genome-wide CTCF binding has diverged substantially following transposon-mediated motif expansions. Therefore, the CTCF consensus motif poorly predicts TADs, and additional factors must modulate CTCF binding and subsequent TAD formation. Here, we demonstrate that the ChAHP complex (CHD4, ADNP, HP1) competes with CTCF for a common set of binding motifs. In Adnp knockout cells, novel insulated regions are formed at sites normally bound by ChAHP, whereas proximal canonical boundaries are weakened. These data reveal that CTCF-mediated loop formation is modulated by a distinct zinc-finger protein complex. Strikingly, ChAHP-bound loci are mainly situated within less diverged SINE B2 transposable elements. This implicates ChAHP in maintenance of evolutionarily conserved spatial chromatin organization by buffering novel CTCF binding sites that emerged through SINE expansions.
Asunto(s)
Factor de Unión a CCCTC/metabolismo , Cromatina/metabolismo , Proteínas Cromosómicas no Histona/metabolismo , ADN Helicasas/metabolismo , Células Madre Embrionarias/metabolismo , Proteínas de Homeodominio/metabolismo , Proteínas del Tejido Nervioso/metabolismo , Retroelementos , Animales , Sitios de Unión , Línea Celular , Homólogo de la Proteína Chromobox 5 , Células Madre Embrionarias/citología , Ratones , Unión Proteica , Dominios ProteicosRESUMEN
The spatial organization of chromosomes influences many nuclear processes including gene expression. The cohesin complex shapes the 3D genome by looping together CTCF sites along chromosomes. We show here that chromatin loop size can be increased and that the duration with which cohesin embraces DNA determines the degree to which loops are enlarged. Cohesin's DNA release factor WAPL restricts this loop extension and also prevents looping between incorrectly oriented CTCF sites. We reveal that the SCC2/SCC4 complex promotes the extension of chromatin loops and the formation of topologically associated domains (TADs). Our data support the model that cohesin structures chromosomes through the processive enlargement of loops and that TADs reflect polyclonal collections of loops in the making. Finally, we find that whereas cohesin promotes chromosomal looping, it rather limits nuclear compartmentalization. We conclude that the balanced activity of SCC2/SCC4 and WAPL enables cohesin to correctly structure chromosomes.
Asunto(s)
Proteínas Portadoras/metabolismo , Núcleo Celular/metabolismo , Cromatina/metabolismo , Proteínas Nucleares/metabolismo , Proteínas Proto-Oncogénicas/metabolismo , Acetiltransferasas/metabolismo , Factor de Unión a CCCTC , Proteínas de Ciclo Celular/metabolismo , Proteínas Cromosómicas no Histona/metabolismo , Proteínas de Unión al ADN , Elongasas de Ácidos Grasos , Edición Génica , Humanos , Complejos Multiproteicos/metabolismo , Proteínas Represoras/metabolismo , CohesinasRESUMEN
In this issue, Zhang et al.1 show that CTCF blocks cohesin-mediated loop extrusion in an orientation-dependent manner. Using single-molecule imaging assays, the authors find that dCas9 and R-loops can also stall extrusion.
Asunto(s)
Bioensayo , Elevación , Proteínas de Ciclo Celular/genética , Proteínas Cromosómicas no Histona/genética , CohesinasRESUMEN
Most cancer cells release heterogeneous populations of extracellular vesicles (EVs) containing proteins, lipids, and nucleic acids. In vitro experiments showed that EV uptake can lead to transfer of functional mRNA and altered cellular behavior. However, similar in vivo experiments remain challenging because cells that take up EVs cannot be discriminated from non-EV-receiving cells. Here, we used the Cre-LoxP system to directly identify tumor cells that take up EVs in vivo. We show that EVs released by malignant tumor cells are taken up by less malignant tumor cells located within the same and within distant tumors and that these EVs carry mRNAs involved in migration and metastasis. By intravital imaging, we show that the less malignant tumor cells that take up EVs display enhanced migratory behavior and metastatic capacity. We postulate that tumor cells locally and systemically share molecules carried by EVs in vivo and that this affects cellular behavior.
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Células Neoplásicas Circulantes/metabolismo , Animales , Línea Celular Tumoral , Humanos , Integrasas/metabolismo , Ratones , Metástasis de la Neoplasia , Vesículas Transportadoras/metabolismoRESUMEN
Chromatin folds into dynamic loops that often span hundreds of kilobases and physically wire distant loci together for gene regulation. These loops are continuously created, extended and positioned by structural maintenance of chromosomes (SMC) protein complexes, such as condensin and cohesin, and their regulators, including CTCF, in a highly dynamic process known as loop extrusion. Genetic loss of extrusion factors is lethal, complicating their study. Inducible protein degradation technologies enable the depletion of loop extrusion factors within hours, leading to the rapid reconfiguration of chromatin folding. Here, we review how these technologies have changed our understanding of genome organization, upsetting long-held beliefs on its role in transcription. Finally, we examine recent models that attempt to reconcile observations after chronic versus acute perturbations, and discuss future developments in this rapidly developing field of research.
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Cromatina , Cromosomas , Cromosomas/genética , Regulación de la Expresión Génica , Genoma , Proteínas de Ciclo Celular/genéticaRESUMEN
Chromosomal rearrangements without gene fusions have been implicated in leukemogenesis by causing deregulation of proto-oncogenes via relocation of cryptic regulatory DNA elements. AML with inv(3)/t(3;3) is associated with aberrant expression of the stem-cell regulator EVI1. Applying functional genomics and genome-engineering, we demonstrate that both 3q rearrangements reposition a distal GATA2 enhancer to ectopically activate EVI1 and simultaneously confer GATA2 functional haploinsufficiency, previously identified as the cause of sporadic familial AML/MDS and MonoMac/Emberger syndromes. Genomic excision of the ectopic enhancer restored EVI1 silencing and led to growth inhibition and differentiation of AML cells, which could be replicated by pharmacologic BET inhibition. Our data show that structural rearrangements involving the chromosomal repositioning of a single enhancer can cause deregulation of two unrelated distal genes, with cancer as the outcome.
Asunto(s)
Cromosomas Humanos Par 3 , Proteínas de Unión al ADN/genética , Elementos de Facilitación Genéticos , Factor de Transcripción GATA2/genética , Regulación Neoplásica de la Expresión Génica , Leucemia Mieloide Aguda/genética , Síndromes Mielodisplásicos/genética , Proto-Oncogenes/genética , Factores de Transcripción/genética , Línea Celular Tumoral , Inversión Cromosómica , Humanos , Proteína del Locus del Complejo MDS1 y EV11 , Regiones Promotoras Genéticas , Activación Transcripcional , Translocación GenéticaRESUMEN
Genome-wide transcriptional activity involves the binding of many transcription factors (TFs) to thousands of sites in the genome. Pioneer TFs are a class of TFs that maintain open chromatin and allow non-pioneer TFs access to their target sites. Determining which TF binding sites directly drive transcription remains a challenge. Here, we use acute protein depletion of the pioneer TF SOX2 to establish its functionality in maintaining chromatin accessibility. We show that thousands of accessible sites are lost within an hour of protein depletion, indicating rapid turnover of these sites in the absence of the pioneer factor. To understand the relationship with transcription, we performed nascent transcription analysis and found that open chromatin sites that are maintained by SOX2 are highly predictive of gene expression, in contrast to all other SOX2 binding sites. We use CRISPR-Cas9 genome editing in the Klf2 locus to functionally validate a predicted regulatory element. We conclude that the regulatory activity of SOX2 is exerted mainly at sites where it maintains accessibility and that other binding sites are largely dispensable for gene regulation.
Asunto(s)
Cromatina , Factores de Transcripción SOXB1 , Factores de Transcripción , Sitios de Unión , Cromatina/genética , Regulación de la Expresión Génica , Unión Proteica , Factores de Transcripción/metabolismo , Factores de Transcripción SOXB1/genética , Factores de Transcripción SOXB1/metabolismo , Células Madre Embrionarias de Ratones/metabolismo , Animales , RatonesRESUMEN
Condensin is a conserved SMC complex that uses its ATPase machinery to structure genomes, but how it does so is largely unknown. We show that condensin's ATPase has a dual role in chromosome condensation. Mutation of one ATPase site impairs condensation, while mutating the second site results in hyperactive condensin that compacts DNA faster than wild-type, both in vivo and in vitro. Whereas one site drives loop formation, the second site is involved in the formation of more stable higher-order Z loop structures. Using hyperactive condensin I, we reveal that condensin II is not intrinsically needed for the shortening of mitotic chromosomes. Condensin II rather is required for a straight chromosomal axis and enables faithful chromosome segregation by counteracting the formation of ultrafine DNA bridges. SMC complexes with distinct roles for each ATPase site likely reflect a universal principle that enables these molecular machines to intricately control chromosome architecture.
Asunto(s)
Adenosina Trifosfatasas/metabolismo , Ensamble y Desensamble de Cromatina/fisiología , Proteínas de Unión al ADN/metabolismo , Complejos Multiproteicos/metabolismo , Adenosina Trifosfatasas/genética , Adenosina Trifosfatasas/fisiología , Adenosina Trifosfato/química , Sitios de Unión/genética , Sitios de Unión/fisiología , Proteínas de Ciclo Celular/metabolismo , Línea Celular Tumoral , Cromatina/fisiología , Proteínas Cromosómicas no Histona/metabolismo , Cromosomas/metabolismo , Cromosomas/fisiología , ADN/metabolismo , Proteínas de Unión al ADN/genética , Proteínas de Unión al ADN/fisiología , Humanos , Complejos Multiproteicos/fisiología , Unión Proteica/fisiología , Subunidades de Proteína/metabolismo , CohesinasRESUMEN
Cohesin catalyses the folding of the genome into loops that are anchored by CTCF1. The molecular mechanism of how cohesin and CTCF structure the 3D genome has remained unclear. Here we show that a segment within the CTCF N terminus interacts with the SA2-SCC1 subunits of human cohesin. We report a crystal structure of SA2-SCC1 in complex with CTCF at a resolution of 2.7 Å, which reveals the molecular basis of the interaction. We demonstrate that this interaction is specifically required for CTCF-anchored loops and contributes to the positioning of cohesin at CTCF binding sites. A similar motif is present in a number of established and newly identified cohesin ligands, including the cohesin release factor WAPL2,3. Our data suggest that CTCF enables the formation of chromatin loops by protecting cohesin against loop release. These results provide fundamental insights into the molecular mechanism that enables the dynamic regulation of chromatin folding by cohesin and CTCF.
Asunto(s)
Factor de Unión a CCCTC/química , Factor de Unión a CCCTC/metabolismo , Proteínas de Ciclo Celular/química , Proteínas de Ciclo Celular/metabolismo , Proteínas Cromosómicas no Histona/química , Proteínas Cromosómicas no Histona/metabolismo , Sitios de Unión , Proteínas Portadoras/metabolismo , Cromatina/química , Cromatina/metabolismo , Cristalografía por Rayos X , ADN/química , ADN/metabolismo , Humanos , Ligandos , Modelos Moleculares , Proteínas Nucleares/metabolismo , Fragmentos de Péptidos/química , Fragmentos de Péptidos/metabolismo , Unión Proteica , Estabilidad Proteica , Subunidades de Proteína/química , Subunidades de Proteína/metabolismo , Proteínas Proto-Oncogénicas/metabolismo , CohesinasRESUMEN
The discovery of the Clustered Regularly Interspaced Short Palindromic Repeats (CRISPR) and its development as a genome editing tool has revolutionized the field of molecular biology. In the DNA damage field, CRISPR has brought an alternative to induce endogenous double-strand breaks (DSBs) at desired genomic locations and study the DNA damage response and its consequences. Many systems for sgRNA delivery have been reported in order to efficiently generate this DSB, including lentiviral vectors. However, some of the consequences of these systems are not yet well understood. Here, we report that lentiviral-based sgRNA vectors can integrate into the endogenous genomic target location, leading to undesired activation of the target gene. By generating a DSB in the regulatory region of the ABCB1 gene using a lentiviral sgRNA vector, we can induce the formation of Taxol-resistant colonies. We show that these colonies upregulate ABCB1 via integration of the EEF1A1 and the U6 promoters from the sgRNA vector. We believe that this is an unreported CRISPR/Cas9 on-target effect that researchers need to be aware of when using lentiviral vectors for genome editing.
Asunto(s)
Sistemas CRISPR-Cas , Edición Génica , Activación TranscripcionalRESUMEN
Ki-67 is a chromatin-associated protein with a dynamic distribution pattern throughout the cell cycle and is thought to be involved in chromatin organization. The lack of genomic interaction maps has hampered a detailed understanding of its roles, particularly during interphase. By pA-DamID mapping in human cell lines, we find that Ki-67 associates with large genomic domains that overlap mostly with late-replicating regions. Early in interphase, when Ki-67 is present in pre-nucleolar bodies, it interacts with these domains on all chromosomes. However, later in interphase, when Ki-67 is confined to nucleoli, it shows a striking shift toward small chromosomes. Nucleolar perturbations indicate that these cell cycle dynamics correspond to nucleolar maturation during interphase, and suggest that nucleolar sequestration of Ki-67 limits its interactions with larger chromosomes. Furthermore, we demonstrate that Ki-67 does not detectably control chromatin-chromatin interactions during interphase, but it competes with the nuclear lamina for interaction with late-replicating DNA, and it controls replication timing of (peri)centromeric regions. Together, these results reveal a highly dynamic choreography of genome interactions and roles for Ki-67 in heterochromatin organization.
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Genómica , Heterocromatina , Humanos , Heterocromatina/genética , Antígeno Ki-67/genéticaRESUMEN
Differentiation of naïve peripheral B cells into terminally differentiated plasma cells is characterized by epigenetic alterations, yet the epigenetic mechanisms that control B-cell fate remain unclear. Here, we identified a role for the histone H3K79 methyltransferase DOT1L in controlling B-cell differentiation. Mouse B cells lacking Dot1L failed to establish germinal centers (GC) and normal humoral immune responses in vivo. In vitro, activated B cells in which Dot1L was deleted showed aberrant differentiation and prematurely acquired plasma cell characteristics. Similar results were obtained when DOT1L was chemically inhibited in mature B cells in vitro. Mechanistically, combined epigenomics and transcriptomics analysis revealed that DOT1L promotes expression of a pro-proliferative, pro-GC program. In addition, DOT1L indirectly supports the repression of an anti-proliferative plasma cell differentiation program by maintaining the repression of Polycomb Repressor Complex 2 (PRC2) targets. Our findings show that DOT1L is a key modulator of the core transcriptional and epigenetic landscape in B cells, establishing an epigenetic barrier that warrants B-cell naivety and GC B-cell differentiation.
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Linfocitos B/citología , Diferenciación Celular , N-Metiltransferasa de Histona-Lisina , Histonas , Metiltransferasas , Animales , Epigénesis Genética , N-Metiltransferasa de Histona-Lisina/genética , Histonas/genética , Histonas/metabolismo , Metiltransferasas/genética , Metiltransferasas/metabolismo , RatonesRESUMEN
CCCTC-binding factor (CTCF) is an architectural protein involved in the three-dimensional (3D) organization of chromatin. In this study, we assayed the 3D genomic contact profiles of a large number of CTCF binding sites with high-resolution 4C-seq. As recently reported, our data also suggest that chromatin loops preferentially form between CTCF binding sites oriented in a convergent manner. To directly test this, we used CRISPR/Cas9 genome editing to delete core CTCF binding sites in three loci, including the CTCF site in the Sox2 super-enhancer. In all instances, CTCF and cohesin recruitment were lost, and chromatin loops with distal, convergent CTCF sites were disrupted or destabilized. Re-insertion of oppositely oriented CTCF recognition sequences restored CTCF and cohesin recruitment, but did not re-establish chromatin loops. We conclude that CTCF binding polarity plays a functional role in the formation of higher-order chromatin structure.
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Cromatina/química , Proteínas Represoras/química , Proteínas Represoras/metabolismo , Animales , Sitios de Unión , Factor de Unión a CCCTC , Sistemas CRISPR-Cas , Proteínas de Ciclo Celular/metabolismo , Línea Celular , Proteínas Cromosómicas no Histona/metabolismo , Células Madre Embrionarias/citología , Ratones , Unión Proteica , CohesinasRESUMEN
Dosage compensation mechanisms provide a paradigm to study the contribution of chromosomal conformation toward targeting and spreading of epigenetic regulators over a specific chromosome. By using Hi-C and 4C analyses, we show that high-affinity sites (HAS), landing platforms of the male-specific lethal (MSL) complex, are enriched around topologically associating domain (TAD) boundaries on the X chromosome and harbor more long-range contacts in a sex-independent manner. Ectopically expressed roX1 and roX2 RNAs target HAS on the X chromosome in trans and, via spatial proximity, induce spreading of the MSL complex in cis, leading to increased expression of neighboring autosomal genes. We show that the MSL complex regulates nucleosome positioning at HAS, therefore acting locally rather than influencing the overall chromosomal architecture. We propose that the sex-independent, three-dimensional conformation of the X chromosome poises it for exploitation by the MSL complex, thereby facilitating spreading in males.
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Proteínas de Unión al ADN/metabolismo , Proteínas de Drosophila/metabolismo , Drosophila melanogaster/genética , Proteínas de Unión al ARN/metabolismo , Factores de Transcripción/metabolismo , Cromosoma X/metabolismo , Animales , Sitios de Unión , Línea Celular , Ensamble y Desensamble de Cromatina , Análisis Citogenético , Compensación de Dosificación (Genética) , Proteínas de Drosophila/genética , Drosophila melanogaster/metabolismo , Femenino , Masculino , Proteínas de Unión al ARN/genética , Factores de Transcripción/genética , Cromosoma X/genéticaRESUMEN
Upon recruitment to active enhancers and promoters, RNA polymerase II (Pol II) generates short non-coding transcripts of unclear function. The mechanisms that control the length and the amount of ncRNAs generated by cis-regulatory elements are largely unknown. Here, we show that the adaptor protein WDR82 and its associated complexes actively limit such non-coding transcription. WDR82 targets the SET1 H3K4 methyltransferases and the nuclear protein phosphatase 1 (PP1) complexes to the initiating Pol II. WDR82 and PP1 also interact with components of the transcriptional termination and RNA processing machineries. Depletion of WDR82, SET1, or the PP1 subunit required for its nuclear import caused distinct but overlapping transcription termination defects at highly expressed genes and active enhancers and promoters, thus enabling the increased synthesis of unusually long ncRNAs. These data indicate that transcription initiated from cis-regulatory elements is tightly coordinated with termination mechanisms that impose the synthesis of short RNAs.
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Núcleo Celular/metabolismo , Elementos de Facilitación Genéticos/fisiología , Regiones Promotoras Genéticas/fisiología , ARN Polimerasa II/metabolismo , ARN no Traducido/biosíntesis , Terminación de la Transcripción Genética/fisiología , Transporte Activo de Núcleo Celular/fisiología , Animales , Núcleo Celular/genética , Proteínas Cromosómicas no Histona/genética , Proteínas Cromosómicas no Histona/metabolismo , N-Metiltransferasa de Histona-Lisina/genética , N-Metiltransferasa de Histona-Lisina/metabolismo , Ratones , Fosfoproteínas Fosfatasas/genética , Fosfoproteínas Fosfatasas/metabolismo , ARN Polimerasa II/genética , ARN no Traducido/genéticaRESUMEN
Cytotoxic T cell differentiation is guided by epigenome adaptations, but how epigenetic mechanisms control lymphocyte development has not been well defined. Here we show that the histone methyltransferase DOT1L, which marks the nucleosome core on active genes, safeguards normal differentiation of CD8+ T cells. T cell-specific ablation of Dot1L resulted in loss of naïve CD8+ T cells and premature differentiation toward a memory-like state, independent of antigen exposure and in a cell-intrinsic manner. Mechanistically, DOT1L controlled CD8+ T cell differentiation by ensuring normal T cell receptor density and signaling. DOT1L also maintained epigenetic identity, in part by indirectly supporting the repression of developmentally regulated genes. Finally, deletion of Dot1L in T cells resulted in an impaired immune response. Through our study, DOT1L is emerging as a central player in physiology of CD8+ T cells, acting as a barrier to prevent premature differentiation and controlling epigenetic integrity.
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Linfocitos T CD8-positivos/metabolismo , N-Metiltransferasa de Histona-Lisina/metabolismo , Animales , Antígenos de Diferenciación/genética , Antígenos de Diferenciación/metabolismo , Diferenciación Celular/genética , Epigénesis Genética/genética , Epigenómica , Femenino , Histona Metiltransferasas/metabolismo , N-Metiltransferasa de Histona-Lisina/fisiología , Histonas/metabolismo , Masculino , Metiltransferasas/metabolismo , RatonesRESUMEN
The genome is folded nonrandomly inside the cell nucleus. How this contributes to gene regulation is an important subject of investigation. A new study by Despang et al. shows how the spatial segregation of genes and regulatory regions can influence developmental expression in subtle, but critical ways.
Asunto(s)
Regulación de la Expresión Génica , Genoma , Núcleo CelularRESUMEN
Binding within or nearby target genes involved in cell proliferation and survival enables the p53 tumor suppressor gene to regulate their transcription and cell-cycle progression. Using genome-wide chromatin-binding profiles, we describe binding of p53 also to regions located distantly from any known p53 target gene. Interestingly, many of these regions possess conserved p53-binding sites and all known hallmarks of enhancer regions. We demonstrate that these p53-bound enhancer regions (p53BERs) indeed contain enhancer activity and interact intrachromosomally with multiple neighboring genes to convey long-distance p53-dependent transcription regulation. Furthermore, p53BERs produce, in a p53-dependent manner, enhancer RNAs (eRNAs) that are required for efficient transcriptional enhancement of interacting target genes and induction of a p53-dependent cell-cycle arrest. Thus, our results ascribe transcription enhancement activity to p53 with the capacity to regulate multiple genes from a single genomic binding site. Moreover, eRNA production from p53BERs is required for efficient p53 transcription enhancement.
Asunto(s)
Elementos de Facilitación Genéticos , ARN/metabolismo , Transcripción Genética , Proteína p53 Supresora de Tumor/metabolismo , Puntos de Control del Ciclo Celular/genética , Cromatina/metabolismo , Cromosomas Humanos/metabolismo , Regulación Neoplásica de la Expresión Génica , Genes , Humanos , Células MCF-7 , Modelos Genéticos , Unión Proteica/genética , ARN Mensajero/genética , ARN Mensajero/metabolismo , ARN no Traducido/metabolismoRESUMEN
During pregnancy, cell-free DNA (cfDNA) in maternal blood encompasses a small percentage of cell-free fetal DNA (cffDNA), an easily accessible source for determination of fetal disease status in risk families through non-invasive procedures. In case of monogenic heritable disease, background maternal cfDNA prohibits direct observation of the maternally inherited allele. Non-invasive prenatal diagnostics (NIPD) of monogenic diseases therefore relies on parental haplotyping and statistical assessment of inherited alleles from cffDNA, techniques currently unavailable for routine clinical practice. Here, we present monogenic NIPD (MG-NIPD), which requires a blood sample from both parents, for targeted locus amplification (TLA)-based phasing of heterozygous variants selectively at a gene of interest. Capture probes-based targeted sequencing of cfDNA from the pregnant mother and a tailored statistical analysis enables predicting fetal gene inheritance. MG-NIPD was validated for 18 pregnancies, focusing on CFTR, CYP21A2, and HBB. In all cases we could predict the inherited alleles with >98% confidence, even at relatively early stages (8 weeks) of pregnancy. This prediction and the accuracy of parental haplotyping was confirmed by sequencing of fetal material obtained by parallel invasive procedures. MG-NIPD is a robust method that requires standard instrumentation and can be implemented in any clinic to provide families carrying a severe monogenic disease with a prenatal diagnostic test based on a simple blood draw.