TY - JOUR
T1 - Biallelic mutations in nucleoporin NUP88 cause lethal fetal akinesia deformation sequence
AU - Bonnin, Edith
AU - Cabochette, Pauline
AU - Filosa, Alessandro
AU - Jühlen, Ramona
AU - Komatsuzaki, Shoko
AU - Hezwani, Mohammed
AU - Dickmanns, Achim
AU - Martinelli, Valérie
AU - Vermeersch, Marjorie
AU - Supply, Lynn
AU - Martins, Nuno
AU - Pirenne, Laurence
AU - Ravenscroft, Gianina
AU - Lombard, Marcus
AU - Port, Sarah
AU - Spillner, Christiane
AU - Janssens, Sandra
AU - Roets, Ellen
AU - Van Dorpe, Jo
AU - Lammens, Martin
AU - Kehlenbach, Ralph H.
AU - Ficner, Ralf
AU - Laing, Nigel G.
AU - Hoffmann, Katrin
AU - Vanhollebeke, Benoit
AU - Fahrenkrog, Birthe
PY - 2018/12/1
Y1 - 2018/12/1
N2 - Nucleoporins build the nuclear pore complex (NPC), which, as sole gate for nuclear-cytoplasmic exchange, is of outmost importance for normal cell function. Defects in the process of nucleocytoplasmic transport or in its machinery have been frequently described in human diseases, such as cancer and neurodegenerative disorders, but only in a few cases of developmental disorders. Here we report biallelic mutations in the nucleoporin NUP88 as a novel cause of lethal fetal akinesia deformation sequence (FADS) in two families. FADS comprises a spectrum of clinically and genetically heterogeneous disorders with congenital malformations related to impaired fetal movement. We show that genetic disruption of nup88 in zebrafish results in pleiotropic developmental defects reminiscent of those seen in affected human fetuses, including locomotor defects as well as defects at neuromuscular junctions. Phenotypic alterations become visible at distinct developmental stages, both in affected human fetuses and in zebrafish, whereas early stages of development are apparently normal. The zebrafish phenotypes caused by nup88 deficiency are rescued by expressing wild-type Nup88 but not the disease-linked mutant forms of Nup88. Furthermore, using human and mouse cell lines as well as immunohistochemistry on fetal muscle tissue, we demonstrate that NUP88 depletion affects rapsyn, a key regulator of the muscle nicotinic acetylcholine receptor at the neuromuscular junction. Together, our studies provide the first characterization of NUP88 in vertebrate development, expand our understanding of the molecular events causing FADS, and suggest that variants in NUP88 should be investigated in cases of FADS.
AB - Nucleoporins build the nuclear pore complex (NPC), which, as sole gate for nuclear-cytoplasmic exchange, is of outmost importance for normal cell function. Defects in the process of nucleocytoplasmic transport or in its machinery have been frequently described in human diseases, such as cancer and neurodegenerative disorders, but only in a few cases of developmental disorders. Here we report biallelic mutations in the nucleoporin NUP88 as a novel cause of lethal fetal akinesia deformation sequence (FADS) in two families. FADS comprises a spectrum of clinically and genetically heterogeneous disorders with congenital malformations related to impaired fetal movement. We show that genetic disruption of nup88 in zebrafish results in pleiotropic developmental defects reminiscent of those seen in affected human fetuses, including locomotor defects as well as defects at neuromuscular junctions. Phenotypic alterations become visible at distinct developmental stages, both in affected human fetuses and in zebrafish, whereas early stages of development are apparently normal. The zebrafish phenotypes caused by nup88 deficiency are rescued by expressing wild-type Nup88 but not the disease-linked mutant forms of Nup88. Furthermore, using human and mouse cell lines as well as immunohistochemistry on fetal muscle tissue, we demonstrate that NUP88 depletion affects rapsyn, a key regulator of the muscle nicotinic acetylcholine receptor at the neuromuscular junction. Together, our studies provide the first characterization of NUP88 in vertebrate development, expand our understanding of the molecular events causing FADS, and suggest that variants in NUP88 should be investigated in cases of FADS.
UR - http://www.scopus.com/inward/record.url?scp=85059235717&partnerID=8YFLogxK
U2 - 10.1371/journal.pgen.1007845
DO - 10.1371/journal.pgen.1007845
M3 - Article
C2 - 30543681
AN - SCOPUS:85059235717
SN - 1553-7390
VL - 14
JO - PLoS Genetics
JF - PLoS Genetics
IS - 12
M1 - e1007845
ER -