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- Hu, H., et al.
(författare)
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X-exome sequencing of 405 unresolved families identifies seven novel intellectual disability genes
- 2016
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Ingår i: Molecular Psychiatry. - : Springer Science and Business Media LLC. - 1359-4184 .- 1476-5578. ; 21:1, s. 133-148
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Tidskriftsartikel (refereegranskat)abstract
- X-linked intellectual disability (XLID) is a clinically and genetically heterogeneous disorder. During the past two decades in excess of 100 X-chromosome ID genes have been identified. Yet, a large number of families mapping to the X-chromosome remained unresolved suggesting that more XLID genes or loci are yet to be identified. Here, we have investigated 405 unresolved families with XLID. We employed massively parallel sequencing of all X-chromosome exons in the index males. The majority of these males were previously tested negative for copy number variations and for mutations in a subset of known XLID genes by Sanger sequencing. In total, 745 X-chromosomal genes were screened. After stringent filtering, a total of 1297 non-recurrent exonic variants remained for prioritization. Co-segregation analysis of potential clinically relevant changes revealed that 80 families (20%) carried pathogenic variants in established XLID genes. In 19 families, we detected likely causative protein truncating and missense variants in 7 novel and validated XLID genes (CLCN4, CNKSR2, FRMPD4, KLHL15, LAS1L, RLIM and USP27X) and potentially deleterious variants in 2 novel candidate XLID genes (CDK16 and TAF1). We show that the CLCN4 and CNKSR2 variants impair protein functions as indicated by electrophysiological studies and altered differentiation of cultured primary neurons from Clcn4(-/-) mice or after mRNA knock-down. The newly identified and candidate XLID proteins belong to pathways and networks with established roles in cognitive function and intellectual disability in particular. We suggest that systematic sequencing of all X-chromosomal genes in a cohort of patients with genetic evidence for X-chromosome locus involvement may resolve up to 58% of Fragile X-negative cases.
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| 3. |
- Hedov, Gerth, et al.
(författare)
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First information and support provided to parents of children with Down syndrome in Sweden : clinical goals and parental experiences
- 2002
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Ingår i: Acta Paediatrica. - 0803-5253 .- 1651-2227. ; 91:12, s. 1344-1349
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Tidskriftsartikel (refereegranskat)abstract
- When parents are informed that their newborn child has Down syndrome (DS), they often respond with a traumatic crisis reaction. The aims of this study were to assess the clinical goals regarding the first information and support provided to parents of newborn children with DS at the Swedish paediatric departments, and to analyse the parents' experiences of how they were first informed and treated. Data were collected during 1992-1993 from all of the 51 departments of paediatrics in Sweden. Information on the parents' experiences, collected retrospectively in 1996, was based on recollection by 165 parents of 86 children with DS born between 1989 and 1993 at 10 of the paediatric departments considered representative for Sweden. Seventy-five percent of the families were informed about the diagnosis within 24 h post partum. Some parents felt they were informed too late, and a few parents that they were told too soon. Half of the parents were satisfied with the timing. About 70% of the parents considered the information insufficient and 60% felt that they had been unsupported. Seventy percent would have liked more frequent information. Parental criticisms concerning the way in which the information was provided were that they received too much negative information about DS and that both the communication skills and the basic knowledge of DS on the part of the professionals could have been better. CONCLUSION: The Swedish paediatric departments fall short of their reported strong clinical goals regarding the initial information in Sweden, and improvements in this area are desirable.
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| 4. |
- Hedov, Gerth, et al.
(författare)
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Sickness absence in Swedish parents of children with Down's syndrome : relation to self-perceived health, stress and sense of coherence
- 2006
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Ingår i: Journal of Intellectual Disability Research. - 0964-2633 .- 1365-2788. ; 50:7, s. 546-552
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: The aims of present study were to study sickness absence among Swedish parents of children with Down's syndrome (DS) and to compare their rates of absence with those of control parents. Sickness absence data for 165 DS parents were compared with those for 174 control parents; all data were for the period 1997-2000. Sickness absence rates were also related to parental self-perceived health, stress and sense of coherence. METHODS: The self-administrated measures of parental self-perceived health, stress and sense of coherence were compared with the number of days of sickness absence. RESULTS: In about two-thirds of the parents in both the study and the control group, no days of sickness absence were registered. Six of the DS parents had remarkably large numbers of days of sickness absence (more than 100 per year). None of the control parents had such high sickness absence rates. It is speculated that there is a small group (less than 5%) of parents who are more vulnerable to the birth of a child with DS. Apart from these six DS parents, sickness absence was not more frequent among the DS parents than among the control parents. DS parents stayed at home to care for their sick DS child three times more often than control parents did for their non-disabled child. DS fathers took greater responsibility in the care of their temporarily sick child and stayed at home to care for the child even more often than control mothers did. DS parents with sickness periods experienced small deterioration in self-perceived health, significantly higher stress and decreased sense of coherence in comparison with parents without sickness periods. CONCLUSIONS: There was a great similarity in sick leave rates due to one's own sickness between DS and control parents, but a small group of DS parents (<5%) may be more vulnerable. DS fathers stayed at home to care for their sick DS child remarkably often.
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| 5. |
- Hedov, Gerth, et al.
(författare)
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Swedish parents of children with Down's syndrome : parental stress and sense of coherence in relation to employment rate and time spent in child care
- 2002
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Ingår i: Scandinavian Journal of Caring Sciences. - 0283-9318 .- 1471-6712. ; 16:4, s. 424-430
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Tidskriftsartikel (refereegranskat)abstract
- Becoming parents of a child with Down's syndrome (DS) challenges the adjustment ability in parenthood. Individuals with higher sense of coherence (SOC) are supposed to manage stressors better than those with lower SOC. The aims of this study were to investigate parental self-perceived stress, SOC, frequency of gainful employment and amount of time spent on child care in Swedish DS parents (165 parents; 86 mothers, 79 fathers) and to compare those with control parents of healthy children (169 parents; 87 mothers, 82 fathers). The mean age of the children was 4.7 years. Parents responded to questionnaires separately including Hymovich's Parent Perception Inventory as stress measurement and Antonovsky's short version of the Orientation to Life. No differences concerning total employment rate were observed, but the DS mothers were more often employed part-time than control mothers. The DS parents did not spend more time on child care than the control parents and they did not differ in mean SOC score, but the DS parents perceived greater stress. The differences in stress, particularly between the DS and control mothers, were related to time-demanding areas. Parents with high SOC scores experienced significantly less self-perceived stress.
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| 6. |
- Karadima, G, et al.
(författare)
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Nondisjunction studies in trisomy 8.
- 1997
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Ingår i: CYTOGENETICS AND CELL GENETICS. - 0301-0171. ; 77:1-2, s. P105-P105
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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