Complete lung agenesis caused by complex genomic rearrangements with neo-TAD formation at the SHH locus
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Complete lung agenesis caused by complex genomic rearrangements with neo-TAD formation at the SHH locus. / Melo, Uirá Souto; Piard, Juliette; Fischer-Zirnsak, Björn; Klever, Marius-Konstantin; Schöpflin, Robert; Mensah, Martin Atta; Holtgrewe, Manuel; Arbez-Gindre, Francine; Martin, Alain; Guigue, Virginie; Gaillard, Dominique; Landais, Emilie; Roze, Virginie; Kremer, Valerie; Ramanah, Rajeev; Cabrol, Christelle; Harms, Frederike L; Kornak, Uwe; Spielmann, Malte; Mundlos, Stefan; Van Maldergem, Lionel.
in: HUM GENET, Jahrgang 140, Nr. 10, 10.2021, S. 1459-1469.Publikationen: SCORING: Beitrag in Fachzeitschrift/Zeitung › SCORING: Zeitschriftenaufsatz › Forschung › Begutachtung
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TY - JOUR
T1 - Complete lung agenesis caused by complex genomic rearrangements with neo-TAD formation at the SHH locus
AU - Melo, Uirá Souto
AU - Piard, Juliette
AU - Fischer-Zirnsak, Björn
AU - Klever, Marius-Konstantin
AU - Schöpflin, Robert
AU - Mensah, Martin Atta
AU - Holtgrewe, Manuel
AU - Arbez-Gindre, Francine
AU - Martin, Alain
AU - Guigue, Virginie
AU - Gaillard, Dominique
AU - Landais, Emilie
AU - Roze, Virginie
AU - Kremer, Valerie
AU - Ramanah, Rajeev
AU - Cabrol, Christelle
AU - Harms, Frederike L
AU - Kornak, Uwe
AU - Spielmann, Malte
AU - Mundlos, Stefan
AU - Van Maldergem, Lionel
N1 - © 2021. The Author(s).
PY - 2021/10
Y1 - 2021/10
N2 - During human organogenesis, lung development is a timely and tightly regulated developmental process under the control of a large number of signaling molecules. Understanding how genetic variants can disturb normal lung development causing different lung malformations is a major goal for dissecting molecular mechanisms during embryogenesis. Here, through exome sequencing (ES), array CGH, genome sequencing (GS) and Hi-C, we aimed at elucidating the molecular basis of bilateral isolated lung agenesis in three fetuses born to a non-consanguineous family. We detected a complex genomic rearrangement containing duplicated, triplicated and deleted fragments involving the SHH locus in fetuses presenting complete agenesis of both lungs and near-complete agenesis of the trachea, diagnosed by ultrasound screening and confirmed at autopsy following termination. The rearrangement did not include SHH itself, but several regulatory elements for lung development, such as MACS1, a major SHH lung enhancer, and the neighboring genes MNX1 and NOM1. The rearrangement incorporated parts of two topologically associating domains (TADs) including their boundaries. Hi-C of cells from one of the affected fetuses showed the formation of two novel TADs each containing SHH enhancers and the MNX1 and NOM1 genes. Hi-C together with GS indicate that the new 3D conformation is likely causative for this condition by an inappropriate activation of MNX1 included in the neo-TADs by MACS1 enhancer, further highlighting the importance of the 3D chromatin conformation in human disease.
AB - During human organogenesis, lung development is a timely and tightly regulated developmental process under the control of a large number of signaling molecules. Understanding how genetic variants can disturb normal lung development causing different lung malformations is a major goal for dissecting molecular mechanisms during embryogenesis. Here, through exome sequencing (ES), array CGH, genome sequencing (GS) and Hi-C, we aimed at elucidating the molecular basis of bilateral isolated lung agenesis in three fetuses born to a non-consanguineous family. We detected a complex genomic rearrangement containing duplicated, triplicated and deleted fragments involving the SHH locus in fetuses presenting complete agenesis of both lungs and near-complete agenesis of the trachea, diagnosed by ultrasound screening and confirmed at autopsy following termination. The rearrangement did not include SHH itself, but several regulatory elements for lung development, such as MACS1, a major SHH lung enhancer, and the neighboring genes MNX1 and NOM1. The rearrangement incorporated parts of two topologically associating domains (TADs) including their boundaries. Hi-C of cells from one of the affected fetuses showed the formation of two novel TADs each containing SHH enhancers and the MNX1 and NOM1 genes. Hi-C together with GS indicate that the new 3D conformation is likely causative for this condition by an inappropriate activation of MNX1 included in the neo-TADs by MACS1 enhancer, further highlighting the importance of the 3D chromatin conformation in human disease.
KW - Abnormalities, Multiple/genetics
KW - Adult
KW - Cadaver
KW - Evolution, Molecular
KW - Female
KW - Fetus
KW - Genetic Variation
KW - Genome, Human
KW - Humans
KW - Lung/abnormalities
KW - Lung Diseases/genetics
KW - Male
KW - Organogenesis/genetics
KW - Pregnancy
U2 - 10.1007/s00439-021-02344-6
DO - 10.1007/s00439-021-02344-6
M3 - SCORING: Journal article
C2 - 34436670
VL - 140
SP - 1459
EP - 1469
JO - HUM GENET
JF - HUM GENET
SN - 0340-6717
IS - 10
ER -