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3 results on '"Munnich, A. (Arnold)"'

1. Clinical, biochemical and genetic spectrum of 70 patients with ACAD9 deficiency: Is riboflavin supplementation effective?

Author

Repp, B.M. (Birgit M.), Mastantuono, E. (Elisa), Alston, C.L. (Charlotte L.), Schiff, M. (Manuel), Haack, T.B. (Tobias B.), Rötig, A. (Agns), Ardissone, A. (Anna), Lombès, A. (Anne), Catarino, C.F.B.S., Diodato, D. (Daria), Schottmann, G. (Gudrun), Poulton, J. (Joanna), Burlina, A.B. (Alberto), Jonckheere, A. (An), Munnich, A. (Arnold), Rolinski, B. (Boris), Ghezzi, D. (Daniele), Rokicki, D. (Dariusz), Wellesley, D. (Diana), Martinelli, D. (Diego), Wenhong, D. (Ding), Lamantea, E. (Eleonora), Østergaard, E. (Elsebet), Pronicka, E. (Ewa), Pierre, G. (Germaine), Smeets, H.J.M. (Hubert), Wittig, I. (Ilka), Scurr, I. (Ingrid), Coo, I.F.M. (René) de, Moroni, I. (Isabella), Smet, J. (Joél), Mayr, J.A. (Johannes A.), Dai, L. (Lifang), Meirleir, L. (Linda) de, Schuelke, M. (Markus), Zeviani, M. (Massimo), Morscher, R.J. (Raphael J.), McFarland, R. (Robert), Seneca, S. (S.), Klopstock, T. (Thomas), Meitinger, T. (Thomas), Wieland, T. (Thomas), Strom, T.M. (Tim), Herberg, U. (Ulrike), Ahting, U. (Uwe), Sperl, W. (Wolfgang), Nassogne, M.C. (M.), Ling, H. (Han), Fang, F. (Fang), Freisinger, P. (Peter), Coster, R.N.A. (R. N A) van, Strecker, V. (Valentina), Taylor, R.W. (Robert William), Häberle, J. (Johannes), Vockley, J. (Jerry), Prokisch, H. (Holger), Wortmann, S.B. (S.), Repp, B.M. (Birgit M.), Mastantuono, E. (Elisa), Alston, C.L. (Charlotte L.), Schiff, M. (Manuel), Haack, T.B. (Tobias B.), Rötig, A. (Agns), Ardissone, A. (Anna), Lombès, A. (Anne), Catarino, C.F.B.S., Diodato, D. (Daria), Schottmann, G. (Gudrun), Poulton, J. (Joanna), Burlina, A.B. (Alberto), Jonckheere, A. (An), Munnich, A. (Arnold), Rolinski, B. (Boris), Ghezzi, D. (Daniele), Rokicki, D. (Dariusz), Wellesley, D. (Diana), Martinelli, D. (Diego), Wenhong, D. (Ding), Lamantea, E. (Eleonora), Østergaard, E. (Elsebet), Pronicka, E. (Ewa), Pierre, G. (Germaine), Smeets, H.J.M. (Hubert), Wittig, I. (Ilka), Scurr, I. (Ingrid), Coo, I.F.M. (René) de, Moroni, I. (Isabella), Smet, J. (Joél), Mayr, J.A. (Johannes A.), Dai, L. (Lifang), Meirleir, L. (Linda) de, Schuelke, M. (Markus), Zeviani, M. (Massimo), Morscher, R.J. (Raphael J.), McFarland, R. (Robert), Seneca, S. (S.), Klopstock, T. (Thomas), Meitinger, T. (Thomas), Wieland, T. (Thomas), Strom, T.M. (Tim), Herberg, U. (Ulrike), Ahting, U. (Uwe), Sperl, W. (Wolfgang), Nassogne, M.C. (M.), Ling, H. (Han), Fang, F. (Fang), Freisinger, P. (Peter), Coster, R.N.A. (R. N A) van, Strecker, V. (Valentina), Taylor, R.W. (Robert William), Häberle, J. (Johannes), Vockley, J. (Jerry), Prokisch, H. (Holger), and Wortmann, S.B. (S.)

Abstract

Background: Mitochondrial acyl-CoA dehydrogenase family member 9 (ACAD9) is essential for the assembly of mitochondrial respiratory chain complex I. Disease causing biallelic variants in ACAD9 have been reported in individuals presenting with lactic acidosis and cardiomyopathy. Results: We describe the genetic, clinical and biochemical findings in a cohort of 70 patients, of whom 29 previously unpublished. We found 34 known and 18 previously unreported variants in ACAD9. No patients harbored biallelic loss of function mutations, indicating that this combination is unlikely to be compatible with life. Causal pathogenic variants were distributed throughout the entire gene, and there was no obvious genotype-phenotype correlation. Most of the patients presented in the first year of life. For this subgroup the survival was poor (50% not surviving the first 2 years) comparing to patients with a later presentation (more than 90% surviving 10 years). The most common clinical findings were cardiomyopathy (85%), muscular weakness (75%) and exercise intolerance (72%). Interestingly, severe intellectual deficits were only reported in one patient and s

Published
2018
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2. Phenotype and genotype in 101 males with x-linked creatine transporter deficiency

Author

van de Kamp, J.M. (Jiddeke M.), Betsalel, O.T. (Ofir), Mercimek-Mahmutoglu, S. (Saadet), Abulhoul, L. (L.), Grünewald, S. (Sonja), Anselm, I. (I.), Azzouz, H. (H.), Bratkovic, D. (D.), Brouwer, A.P.M. (Arjan) de, Hamel, B.C. (Ben), Kleefstra, T. (Tjitske), Yntema, H.G., Campistol, J.M., Vilaseca, M.A. (M.), Cheillan, D. (David), D'Hooghe, M. (M.), Diogo, L. (Luisa), Garcia, P. (Paula), Valongo, C. (C.), Fonseca, M. (M.), Frints, S.G.M. (Suzanna), Wilcken, B. (Bridget), Haar, S. (Sigrun) von der, Meijers-Heijboer, E.J. (Hanne), Hofstede, F.C. (Floris), Johnson, D. (David), Kant, S.G. (Sarina), Lion-Francois, L. (Laurence), Pitelet, G. (G.), Longo, N. (N.), Maat-Kievit, A.A. (Anneke), Monteiro, J.P. (J.), Munnich, A. (Arnold), Muntau, A.C. (A.), Nassogne, M.C. (M.), Osaka, H. (H.), Õunap, K. (Katrin), Pinard, J.M. (J.), Quijano-Roy, S. (S.), Poggenburg, I. (I.), Poplawski, N. (Nicola), Abdul-Rahman, O.A. (Omar), Ribes, A. (A.), Arias Pérez, J.I. (José Ignacio), Yaplito-Lee, J. (J.), Schulze, A. (A.), Schwartz, C.E., Schwenger, S. (S.), Soares, G. (G.), Sznajer, Y. (Yves), Valayannopoulos, V. (Vassili), Esch, H. (Hilde) van, Waltz, S. (S.), Wamelink, M.M.C. (Mirjam), Pouwels, P.J.W. (Petra), Errami, A. (Abdellatif), Knaap, M.S. (Marjo) van der, Jakobs, C. (Cornelis), Mancini, G.M.S. (Grazia), Salomons, G.S. (Gajja), van de Kamp, J.M. (Jiddeke M.), Betsalel, O.T. (Ofir), Mercimek-Mahmutoglu, S. (Saadet), Abulhoul, L. (L.), Grünewald, S. (Sonja), Anselm, I. (I.), Azzouz, H. (H.), Bratkovic, D. (D.), Brouwer, A.P.M. (Arjan) de, Hamel, B.C. (Ben), Kleefstra, T. (Tjitske), Yntema, H.G., Campistol, J.M., Vilaseca, M.A. (M.), Cheillan, D. (David), D'Hooghe, M. (M.), Diogo, L. (Luisa), Garcia, P. (Paula), Valongo, C. (C.), Fonseca, M. (M.), Frints, S.G.M. (Suzanna), Wilcken, B. (Bridget), Haar, S. (Sigrun) von der, Meijers-Heijboer, E.J. (Hanne), Hofstede, F.C. (Floris), Johnson, D. (David), Kant, S.G. (Sarina), Lion-Francois, L. (Laurence), Pitelet, G. (G.), Longo, N. (N.), Maat-Kievit, A.A. (Anneke), Monteiro, J.P. (J.), Munnich, A. (Arnold), Muntau, A.C. (A.), Nassogne, M.C. (M.), Osaka, H. (H.), Õunap, K. (Katrin), Pinard, J.M. (J.), Quijano-Roy, S. (S.), Poggenburg, I. (I.), Poplawski, N. (Nicola), Abdul-Rahman, O.A. (Omar), Ribes, A. (A.), Arias Pérez, J.I. (José Ignacio), Yaplito-Lee, J. (J.), Schulze, A. (A.), Schwartz, C.E., Schwenger, S. (S.), Soares, G. (G.), Sznajer, Y. (Yves), Valayannopoulos, V. (Vassili), Esch, H. (Hilde) van, Waltz, S. (S.), Wamelink, M.M.C. (Mirjam), Pouwels, P.J.W. (Petra), Errami, A. (Abdellatif), Knaap, M.S. (Marjo) van der, Jakobs, C. (Cornelis), Mancini, G.M.S. (Grazia), and Salomons, G.S. (Gajja)

Abstract

Background: Creatine transporter deficiency is a monogenic cause of X-linked intellectual disability. Since its first description in 2001 several case reports have been published but an overview of phenotype, genotype and phenotype-genotype correlation has been lacking. Methods: We performed a retrospective study of clinical, biochemical and molecular genetic data of 101 males with X-linked creatine transporter deficiency from 85 families with a pathogenic mutation in the creatine transporter gene (SLC6A8). Results and conclusions: Most patients developed moderate to severe intellectual disability; mild intellectual disability was rare in adult patients. Speech language development was especially delayed but almost a third of the patients were able to speak in sentences. Besides behavioural problems and seizures, mild to moderate motor dysfunction, including extrapyramidal movement abnormalities, and gastrointestinal problems were frequent clinical features. Urinary creatine to creatinine ratio proved to be a reliable screening method besides MR spectroscopy, molecular genetic testing and creatine uptake studies, allowing definition of diagnostic guidelines. A third of patients had a de novo mutation in the SLC6A8 gene. Mothers with an affected son with a de novo mutation should be counselled about a recurrence risk in further pregnancies due to the possibility of low level somatic or germline mosaicism. Missense mutations with residual activity might be associated with a milder phenotype and large deletions extending beyond the 30 end of the SLC6A8 gene with a more severe phenotype. Evaluation of the biochemical phenotype revealed unexpected high creatine levels in cerebrospinal fluid suggesting that the brain is able to synthesise creatine and that the cerebral creatine deficiency is caused by a defect in the reuptake of creatine within the neurones.

Published
2013
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