Loss of Maenli lncRNA expression causes engrailed-1 dependent congenital limb malformations [scRNA-seq]
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ABSTRACT:
PROVIDER: PRJNA628511 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR11612300.fastq.gz | Fastqsanger.gz | |||
| SRR11612301.fastq.gz | Fastqsanger.gz | |||
| SRR11612302.fastq.gz | Fastqsanger.gz | |||
| SRR11612303.fastq.gz | Fastqsanger.gz | |||
| SRR11612304.fastq.gz | Fastqsanger.gz |
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Project description:Long non-coding RNAs (lncRNAs) can be important components in gene regulatory networks1, but we are only beginning to understand the nature and extent of their involvement in human Mendelian disease. Here we show that deletions of an unannotated lncRNA locus on human chromosome 2 cause a severe congenital limb malformation. Using exome sequencing and array CGH, we identified homozygous 27-63 kb deletions located 300 kb upstream of the engrailed-1 (EN1) gene in patients with a complex limb malformation, featuring mesomelic shortening, syndactyly, and ventral nails (dorsal dimelia). Re-engineering of the human deletions in mice resulted in a complete loss of limb-specific En1 expression and a double dorsal limb phenotype, recapitulating the human malformation. Genome-wide analysis in the developing mouse limb revealed the presence of a 4-exon long non-coding transcript within the deleted region, which we named Maenli (for Master activator of En1 in the limb). Functional dissection of the Maenli locus showed that limb-specific En1 expression depends on transcription of Maenli and its loss resulted in the double dorsal limb phenotype. Concomitant monoallelic inactivation of En1 and Maenli in double heterozygous mice did not rescue the limb phenotype, indicating that En1 activation in the limb requires the cis-acting regulatory element Maenli. Moreover, our results strongly suggest that En1 activation is dependent on Maenli transcription, but not on the Maenli RNA itself. Thus, Maenli expression in the limb acts in cis to promote En1 transcriptional activation; its loss results in congenital malformation of the limbs, a subset of the full En1 associated phenotype. Together, our findings provide evidence that mutations involving lncRNAs loci can result in human Mendelian disease.
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Project description:Long non-coding RNAs (lncRNAs) can be important components in gene regulatory networks1, but we are only beginning to understand the nature and extent of their involvement in human Mendelian disease. Here we show that deletions of an unannotated lncRNA locus on human chromosome 2 cause a severe congenital limb malformation. Using exome sequencing and array CGH, we identified homozygous 27-63 kb deletions located 300 kb upstream of the engrailed-1 (EN1) gene in patients with a complex limb malformation, featuring mesomelic shortening, syndactyly, and ventral nails (dorsal dimelia). Re-engineering of the human deletions in mice resulted in a complete loss of limb-specific En1 expression and a double dorsal limb phenotype, recapitulating the human malformation. Genome-wide analysis in the developing mouse limb revealed the presence of a 4-exon long non-coding transcript within the deleted region, which we named Maenli (for Master activator of En1 in the limb). Functional dissection of the Maenli locus showed that limb-specific En1 expression depends on transcription of Maenli and its loss resulted in the double dorsal limb phenotype. Concomitant monoallelic inactivation of En1 and Maenli in double heterozygous mice did not rescue the limb phenotype, indicating that En1 activation in the limb requires the cis-acting regulatory element Maenli. Moreover, our results strongly suggest that En1 activation is dependent on Maenli transcription, but not on the Maenli RNA itself. Thus, Maenli expression in the limb acts in cis to promote En1 transcriptional activation; its loss results in congenital malformation of the limbs, a subset of the full En1 associated phenotype. Together, our findings provide evidence that mutations involving lncRNAs loci can result in human Mendelian disease.
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Project description:Long non-coding RNAs (lncRNAs) can be important components in gene regulatory networks1, but we are only beginning to understand the nature and extent of their involvement in human Mendelian disease. Here we show that deletions of an unannotated lncRNA locus on human chromosome 2 cause a severe congenital limb malformation. Using exome sequencing and array CGH, we identified homozygous 27-63 kb deletions located 300 kb upstream of the engrailed-1 (EN1) gene in patients with a complex limb malformation, featuring mesomelic shortening, syndactyly, and ventral nails (dorsal dimelia). Re-engineering of the human deletions in mice resulted in a complete loss of limb-specific En1 expression and a double dorsal limb phenotype, recapitulating the human malformation. Genome-wide analysis in the developing mouse limb revealed the presence of a 4-exon long non-coding transcript within the deleted region, which we named Maenli (for Master activator of En1 in the limb). Functional dissection of the Maenli locus showed that limb-specific En1 expression depends on transcription of Maenli and its loss resulted in the double dorsal limb phenotype. Concomitant monoallelic inactivation of En1 and Maenli in double heterozygous mice did not rescue the limb phenotype, indicating that En1 activation in the limb requires the cis-acting regulatory element Maenli. Moreover, our results strongly suggest that En1 activation is dependent on Maenli transcription, but not on the Maenli RNA itself. Thus, Maenli expression in the limb acts in cis to promote En1 transcriptional activation; its loss results in congenital malformation of the limbs, a subset of the full En1 associated phenotype. Together, our findings provide evidence that mutations involving lncRNAs loci can result in human Mendelian disease.
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