AGG interruptions and maternal age affect FMR1 CGG repeat allele stability during transmission / Carolyn M. YRIGOLLEN in Journal of Neurodevelopmental Disorders, 6-1 (December 2014)  

Public ISBD [article]  inJournal of Neurodevelopmental Disorders > 6-1 (December 2014) . - p.24 Titre : AGG interruptions and maternal age affect FMR1 CGG repeat allele stability during transmission Type de document : texte imprimé Auteurs : Carolyn M. YRIGOLLEN, Auteur ; Loreto MARTORELL, Auteur ; Blythe DURBIN-JOHNSON, Auteur ; Montserrat NAUDO, Auteur ; Jordi GENOVES, Auteur ; Alessandra MURGIA, Auteur ; Roberta POLLI, Auteur ; Linshu ZHOU, Auteur ; Deborah BARBOUTH, Auteur ; Abigail RUPCHOCK, Auteur ; Brenda FINUCANE, Auteur ; Gary J. LATHAM, Auteur ; Andrew HADD, Auteur ; Elizabeth BERRY-KRAVIS, Auteur ; Flora TASSONE, Auteur Article en page(s) : p.24 Langues : Anglais (eng) Mots-clés : AGG interruptions  Fmr1  full mutation  gray/intermediate allele  premutation  risk of expansion Index. décimale : PER Périodiques Résumé : BACKGROUND: The presence of AGG interruptions in the CGG repeat locus of the fragile X mental retardation 1 (FMR1) gene decreases the instability of the allele during transmission from parent to child, and decreases the risk of expansion of a premutation allele to a full mutation allele (the predominant cause of fragile X syndrome) during maternal transmission. METHODS: To strengthen recent findings on the utility of AGG interruptions in predicting instability or expansion to a full mutation of FMR1 CGG repeat alleles, we assessed the outcomes of 108 intermediate (also named gray zone) and 710 premutation alleles that were transmitted from parent to child, and collected from four international clinical sites. We have used the results to revise our initial model that predicted the risk of a maternal premutation allele expanding to a full mutation during transmission and to test the effect of AGG interruptions on the magnitude of expanded allele instability of intermediate or premutation alleles that did not expand to a full mutation. RESULTS: Consistent with previous studies, the number of AGG triplets that interrupts the CGG repeat locus was found to influence the risk of allele instability, including expansion to a full mutation. The total length of the CGG repeat allele remains the best predictor of instability or expansion to a full mutation, but the number of AGG interruptions and, to a much lesser degree, maternal age are also factors when considering the risk of transmission of the premutation allele to a full mutation. CONCLUSIONS: Our findings demonstrate that a model with total CGG length, number of AGG interruptions, and maternal age is recommended for calculating the risk of expansion to a full mutation during maternal transmission. Taken together, the results of this study provide relevant information for the genetic counseling of female premutation carriers, and improve the current predictive models which calculate risk of expansion to a full mutation using only total CGG repeat length. En ligne : http://dx.doi.org/10.1186/1866-1955-6-24 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=346 [article] AGG interruptions and maternal age affect FMR1 CGG repeat allele stability during transmission [texte imprimé] / Carolyn M. YRIGOLLEN, Auteur ; Loreto MARTORELL, Auteur ; Blythe DURBIN-JOHNSON, Auteur ; Montserrat NAUDO, Auteur ; Jordi GENOVES, Auteur ; Alessandra MURGIA, Auteur ; Roberta POLLI, Auteur ; Linshu ZHOU, Auteur ; Deborah BARBOUTH, Auteur ; Abigail RUPCHOCK, Auteur ; Brenda FINUCANE, Auteur ; Gary J. LATHAM, Auteur ; Andrew HADD, Auteur ; Elizabeth BERRY-KRAVIS, Auteur ; Flora TASSONE, Auteur . - p.24. Langues : Anglais (eng) in Journal of Neurodevelopmental Disorders > 6-1 (December 2014) . - p.24 Mots-clés : AGG interruptions  Fmr1  full mutation  gray/intermediate allele  premutation  risk of expansion Index. décimale : PER Périodiques Résumé : BACKGROUND: The presence of AGG interruptions in the CGG repeat locus of the fragile X mental retardation 1 (FMR1) gene decreases the instability of the allele during transmission from parent to child, and decreases the risk of expansion of a premutation allele to a full mutation allele (the predominant cause of fragile X syndrome) during maternal transmission. METHODS: To strengthen recent findings on the utility of AGG interruptions in predicting instability or expansion to a full mutation of FMR1 CGG repeat alleles, we assessed the outcomes of 108 intermediate (also named gray zone) and 710 premutation alleles that were transmitted from parent to child, and collected from four international clinical sites. We have used the results to revise our initial model that predicted the risk of a maternal premutation allele expanding to a full mutation during transmission and to test the effect of AGG interruptions on the magnitude of expanded allele instability of intermediate or premutation alleles that did not expand to a full mutation. RESULTS: Consistent with previous studies, the number of AGG triplets that interrupts the CGG repeat locus was found to influence the risk of allele instability, including expansion to a full mutation. The total length of the CGG repeat allele remains the best predictor of instability or expansion to a full mutation, but the number of AGG interruptions and, to a much lesser degree, maternal age are also factors when considering the risk of transmission of the premutation allele to a full mutation. CONCLUSIONS: Our findings demonstrate that a model with total CGG length, number of AGG interruptions, and maternal age is recommended for calculating the risk of expansion to a full mutation during maternal transmission. Taken together, the results of this study provide relevant information for the genetic counseling of female premutation carriers, and improve the current predictive models which calculate risk of expansion to a full mutation using only total CGG repeat length. En ligne : http://dx.doi.org/10.1186/1866-1955-6-24 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=346

Latent Class Analysis Identifies Distinctive Behavioral Subtypes in Children with Fragile X Syndrome / Melissa RASPA ; Carla M. BANN ; Julia M. GABLE ; Holly K. HARRIS ; Dejan B. BUDIMIROVIC ; Reymundo LOZANO ; Elizabeth BERRY-KRAVIS ; Milen VELINOV ; Amy L. TALBOY ; Stephanie L. SHERMAN ; Walter E. KAUFMANN ; Marcy SCHUSTER ; Nicole TARTAGLIA ; Robyn A. FILIPINK ; Dejan B. BUDIMIROVIC ; Deborah BARBOUTH ; Amy A. LIGHTBODY ; Allan L. REISS ; Carol M. DELAHUNTY ; Randi J. HAGERMAN ; David HESSL ; Craig ERICKSON ; Gary FELDMAN ; Jonathan D. PICKER ; Ave M. LACHIEWICZ ; Holly K. HARRIS ; Amy N. ESLER ; Richard E. FRYE ; Patricia A. EVANS ; Mary Ann MORRIS ; Barbara HAAS-GIVLER ; Andrea L. GROPMAN ; Ryan S. UY ; Carie M. BUCHANAN ; Jean A. FRAZIER ; Stephanie M. MORRIS ; FORWARD CONSORTIUM in Journal of Autism and Developmental Disorders, 54-2 (February 2024)  

Public ISBD [article]  inJournal of Autism and Developmental Disorders > 54-2 (February 2024) . - p.725-737 Titre : Latent Class Analysis Identifies Distinctive Behavioral Subtypes in Children with Fragile X Syndrome Type de document : texte imprimé Auteurs : Melissa RASPA, Auteur ; Carla M. BANN, Auteur ; Julia M. GABLE, Auteur ; Holly K. HARRIS, Auteur ; Dejan B. BUDIMIROVIC, Auteur ; Reymundo LOZANO, Auteur ; Elizabeth BERRY-KRAVIS, Auteur ; Milen VELINOV, Auteur ; Amy L. TALBOY, Auteur ; Stephanie L. SHERMAN, Auteur ; Walter E. KAUFMANN, Auteur ; Marcy SCHUSTER, Auteur ; Nicole TARTAGLIA, Auteur ; Robyn A. FILIPINK, Auteur ; Dejan B. BUDIMIROVIC, Auteur ; Deborah BARBOUTH, Auteur ; Amy A. LIGHTBODY, Auteur ; Allan L. REISS, Auteur ; Carol M. DELAHUNTY, Auteur ; Randi J. HAGERMAN, Auteur ; David HESSL, Auteur ; Craig ERICKSON, Auteur ; Gary FELDMAN, Auteur ; Jonathan D. PICKER, Auteur ; Ave M. LACHIEWICZ, Auteur ; Holly K. HARRIS, Auteur ; Amy N. ESLER, Auteur ; Richard E. FRYE, Auteur ; Patricia A. EVANS, Auteur ; Mary Ann MORRIS, Auteur ; Barbara HAAS-GIVLER, Auteur ; Andrea L. GROPMAN, Auteur ; Ryan S. UY, Auteur ; Carie M. BUCHANAN, Auteur ; Jean A. FRAZIER, Auteur ; Stephanie M. MORRIS, Auteur ; FORWARD CONSORTIUM, Auteur Article en page(s) : p.725-737 Index. décimale : PER Périodiques Résumé : Fragile X syndrome (FXS) is characterized by variable neurobehavioral abnormalities, which leads to difficulties in developing and evaluating treatments and in determining accurate prognosis. We employed a pediatric cross-sectional sample (1,072 males, 338 females) from FORWARD, a clinic-based natural history study, to identify behavioral subtypes by latent class analysis. Input included co-occurring behavioral conditions, sleep and sensory problems, autistic behavior scales (SCQ, SRS-2), and the Aberrant Behavior Checklist revised for FXS (ABCFX). A 5-class solution yielded the most clinically meaningful, pharmacotherapy independent behavioral groups with distinctive SCQ, SRS-2, and ABCFX profiles, and adequate non-overlap (? 71%): ?Mild? (31%), ?Moderate without Social Impairment? (32%), ?Moderate with Social Impairment? (7%), ?Moderate with Disruptive Behavior? (20%), and ?Severe? (9%). Our findings support FXS subtyping, for improving clinical management and therapeutic development. En ligne : https://doi.org/10.1007/s10803-022-05821-7 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=520 [article] Latent Class Analysis Identifies Distinctive Behavioral Subtypes in Children with Fragile X Syndrome [texte imprimé] / Melissa RASPA, Auteur ; Carla M. BANN, Auteur ; Julia M. GABLE, Auteur ; Holly K. HARRIS, Auteur ; Dejan B. BUDIMIROVIC, Auteur ; Reymundo LOZANO, Auteur ; Elizabeth BERRY-KRAVIS, Auteur ; Milen VELINOV, Auteur ; Amy L. TALBOY, Auteur ; Stephanie L. SHERMAN, Auteur ; Walter E. KAUFMANN, Auteur ; Marcy SCHUSTER, Auteur ; Nicole TARTAGLIA, Auteur ; Robyn A. FILIPINK, Auteur ; Dejan B. BUDIMIROVIC, Auteur ; Deborah BARBOUTH, Auteur ; Amy A. LIGHTBODY, Auteur ; Allan L. REISS, Auteur ; Carol M. DELAHUNTY, Auteur ; Randi J. HAGERMAN, Auteur ; David HESSL, Auteur ; Craig ERICKSON, Auteur ; Gary FELDMAN, Auteur ; Jonathan D. PICKER, Auteur ; Ave M. LACHIEWICZ, Auteur ; Holly K. HARRIS, Auteur ; Amy N. ESLER, Auteur ; Richard E. FRYE, Auteur ; Patricia A. EVANS, Auteur ; Mary Ann MORRIS, Auteur ; Barbara HAAS-GIVLER, Auteur ; Andrea L. GROPMAN, Auteur ; Ryan S. UY, Auteur ; Carie M. BUCHANAN, Auteur ; Jean A. FRAZIER, Auteur ; Stephanie M. MORRIS, Auteur ; FORWARD CONSORTIUM, Auteur . - p.725-737. in Journal of Autism and Developmental Disorders > 54-2 (February 2024) . - p.725-737 Index. décimale : PER Périodiques Résumé : Fragile X syndrome (FXS) is characterized by variable neurobehavioral abnormalities, which leads to difficulties in developing and evaluating treatments and in determining accurate prognosis. We employed a pediatric cross-sectional sample (1,072 males, 338 females) from FORWARD, a clinic-based natural history study, to identify behavioral subtypes by latent class analysis. Input included co-occurring behavioral conditions, sleep and sensory problems, autistic behavior scales (SCQ, SRS-2), and the Aberrant Behavior Checklist revised for FXS (ABCFX). A 5-class solution yielded the most clinically meaningful, pharmacotherapy independent behavioral groups with distinctive SCQ, SRS-2, and ABCFX profiles, and adequate non-overlap (? 71%): ?Mild? (31%), ?Moderate without Social Impairment? (32%), ?Moderate with Social Impairment? (7%), ?Moderate with Disruptive Behavior? (20%), and ?Severe? (9%). Our findings support FXS subtyping, for improving clinical management and therapeutic development. En ligne : https://doi.org/10.1007/s10803-022-05821-7 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=520

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