Brain region-specific altered expression and association of mitochondria-related genes in autism / Ayyappan ANITHA in Molecular Autism, (November 2012)  

Public ISBD [article]  inMolecular Autism > (November 2012) . - 12 p. Titre : Brain region-specific altered expression and association of mitochondria-related genes in autism Type de document : Texte imprimé et/ou numérique Auteurs : Ayyappan ANITHA, Auteur ; Kazuhiko NAKAMURA, Auteur ; Ismail THANSEEM, Auteur ; Kazuo YAMADA, Auteur ; Yoshimi IWAYAMA, Auteur ; Tomoko TOYOTA, Auteur ; Hideo MATSUZAKI, Auteur ; Taishi MIYACHI, Auteur ; Satoru YAMADA, Auteur ; Masatsugu TSUJII, Auteur ; Kenji J. TSUCHIYA, Auteur ; Kaori MATSUMOTO, Auteur ; Yasuhide IWATA, Auteur ; Katsuaki SUZUKI, Auteur ; Hironobu ICHIKAWA, Auteur ; Toshiro SUGIYAMA, Auteur ; Takeo YOSHIKAWA, Auteur ; Norio MORI, Auteur Année de publication : 2012 Article en page(s) : 12 p. Langues : Anglais (eng) Mots-clés : Autism  Mitochondria  Postmortem brain  NEFL  Uncoupling protein  Metaxin Index. décimale : PER Périodiques Résumé : BACKGROUND:Mitochondrial dysfunction (MtD) has been observed in approximately five percent of children with autism spectrum disorders (ASD). MtD could impair highly energy-dependent processes such as neurodevelopment, thereby contributing to autism. Most of the previous studies of MtD in autism have been restricted to the biomarkers of energy metabolism, while most of the genetic studies have been based on mutations in the mitochondrial DNA (mtDNA). Despite the mtDNA, most of the proteins essential for mitochondrial replication and function are encoded by the genomic DNA; so far, there have been very few studies of those genes. Therefore, we carried out a detailed study involving gene expression and genetic association studies of genes related to diverse mitochondrial functions.METHODS:For gene expression analysis, postmortem brain tissues (anterior cingulate gyrus (ACG), motor cortex (MC) and thalamus (THL)) from autism patients (n=8) and controls (n=10) were obtained from the Autism Tissue Program (Princeton, NJ, USA). Quantitative real-time PCR arrays were used to quantify the expression of 84 genes related to diverse functions of mitochondria, including biogenesis, transport, translocation and apoptosis. We used the delta delta Ct ([increment][increment]Ct) method for quantification of gene expression. DNA samples from 841 Caucasian and 188 Japanese families were used in the association study of genes selected from the gene expression analysis. FBAT was used to examine genetic association with autism.RESULTS:Several genes showed brain region-specific expression alterations in autism patients compared to controls. Metaxin 2 (MTX2), neurofilament, light polypeptide (NEFL) and solute carrier family 25, member 27 (SLC25A27) showed consistently reduced expression in the ACG, MC and THL of autism patients. NEFL (P = 0.038; Z-score 2.066) and SLC25A27 (P = 0.046; Z-score 1.990) showed genetic association with autism in Caucasian and Japanese samples, respectively. The expression of DNAJC19, DNM1L, LRPPRC, SLC25A12, SLC25A14, SLC25A24 and TOMM20 were reduced in at least two of the brain regions of autism patients.CONCLUSIONS:Our study, though preliminary, brings to light some new genes associated with MtD in autism. If MtD is detected in early stages, treatment strategies aimed at reducing its impact may be adopted. En ligne : http://dx.doi.org/10.1186/2040-2392-3-12 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=202 [article] Brain region-specific altered expression and association of mitochondria-related genes in autism [Texte imprimé et/ou numérique] / Ayyappan ANITHA, Auteur ; Kazuhiko NAKAMURA, Auteur ; Ismail THANSEEM, Auteur ; Kazuo YAMADA, Auteur ; Yoshimi IWAYAMA, Auteur ; Tomoko TOYOTA, Auteur ; Hideo MATSUZAKI, Auteur ; Taishi MIYACHI, Auteur ; Satoru YAMADA, Auteur ; Masatsugu TSUJII, Auteur ; Kenji J. TSUCHIYA, Auteur ; Kaori MATSUMOTO, Auteur ; Yasuhide IWATA, Auteur ; Katsuaki SUZUKI, Auteur ; Hironobu ICHIKAWA, Auteur ; Toshiro SUGIYAMA, Auteur ; Takeo YOSHIKAWA, Auteur ; Norio MORI, Auteur . - 2012 . - 12 p. Langues : Anglais (eng) in Molecular Autism > (November 2012) . - 12 p. Mots-clés : Autism  Mitochondria  Postmortem brain  NEFL  Uncoupling protein  Metaxin Index. décimale : PER Périodiques Résumé : BACKGROUND:Mitochondrial dysfunction (MtD) has been observed in approximately five percent of children with autism spectrum disorders (ASD). MtD could impair highly energy-dependent processes such as neurodevelopment, thereby contributing to autism. Most of the previous studies of MtD in autism have been restricted to the biomarkers of energy metabolism, while most of the genetic studies have been based on mutations in the mitochondrial DNA (mtDNA). Despite the mtDNA, most of the proteins essential for mitochondrial replication and function are encoded by the genomic DNA; so far, there have been very few studies of those genes. Therefore, we carried out a detailed study involving gene expression and genetic association studies of genes related to diverse mitochondrial functions.METHODS:For gene expression analysis, postmortem brain tissues (anterior cingulate gyrus (ACG), motor cortex (MC) and thalamus (THL)) from autism patients (n=8) and controls (n=10) were obtained from the Autism Tissue Program (Princeton, NJ, USA). Quantitative real-time PCR arrays were used to quantify the expression of 84 genes related to diverse functions of mitochondria, including biogenesis, transport, translocation and apoptosis. We used the delta delta Ct ([increment][increment]Ct) method for quantification of gene expression. DNA samples from 841 Caucasian and 188 Japanese families were used in the association study of genes selected from the gene expression analysis. FBAT was used to examine genetic association with autism.RESULTS:Several genes showed brain region-specific expression alterations in autism patients compared to controls. Metaxin 2 (MTX2), neurofilament, light polypeptide (NEFL) and solute carrier family 25, member 27 (SLC25A27) showed consistently reduced expression in the ACG, MC and THL of autism patients. NEFL (P = 0.038; Z-score 2.066) and SLC25A27 (P = 0.046; Z-score 1.990) showed genetic association with autism in Caucasian and Japanese samples, respectively. The expression of DNAJC19, DNM1L, LRPPRC, SLC25A12, SLC25A14, SLC25A24 and TOMM20 were reduced in at least two of the brain regions of autism patients.CONCLUSIONS:Our study, though preliminary, brings to light some new genes associated with MtD in autism. If MtD is detected in early stages, treatment strategies aimed at reducing its impact may be adopted. En ligne : http://dx.doi.org/10.1186/2040-2392-3-12 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=202

Genome-wide Association Study of Autism Spectrum Disorder in the East Asian Populations / Xiaoxi LIU in Autism Research, 9-3 (March 2016)  

Public ISBD [article]  inAutism Research > 9-3 (March 2016) . - p.340-349 Titre : Genome-wide Association Study of Autism Spectrum Disorder in the East Asian Populations Type de document : Texte imprimé et/ou numérique Auteurs : Xiaoxi LIU, Auteur ; Takafumi SHIMADA, Auteur ; Takeshi OTOWA, Auteur ; Yu-Yu WU, Auteur ; Yoshiya KAWAMURA, Auteur ; Mamoru TOCHIGI, Auteur ; Yasuhide IWATA, Auteur ; Tadashi UMEKAGE, Auteur ; Tomoko TOYOTA, Auteur ; Motoko MAEKAWA, Auteur ; Yoshimi IWAYAMA, Auteur ; Katsuaki SUZUKI, Auteur ; Chihiro KAKIUCHI, Auteur ; Hitoshi KUWABARA, Auteur ; Yukiko KANO, Auteur ; Hisami NISHIDA, Auteur ; Toshiro SUGIYAMA, Auteur ; Nobumasa KATO, Auteur ; Chia-Hsiang CHEN, Auteur ; Norio MORI, Auteur ; Kazuo YAMADA, Auteur ; Takeo YOSHIKAWA, Auteur ; Kiyoto KASAI, Auteur ; Katsushi TOKUNAGA, Auteur ; Tsukasa SASAKI, Auteur ; Susan Shur-Fen GAU, Auteur Article en page(s) : p.340-349 Langues : Anglais (eng) Mots-clés : autism  autism spectrum disorder  genome-wide association study  genetics  common variation Index. décimale : PER Périodiques Résumé : Autism spectrum disorder is a heterogeneous neurodevelopmental disorder with strong genetic basis. To identify common genetic variations conferring the risk of ASD, we performed a two-stage genome-wide association study using ASD family and healthy control samples obtained from East Asian populations. A total of 166 ASD families (n?=?500) and 642 healthy controls from the Japanese population were used as the discovery cohort. Approximately 900,000 single nucleotide polymorphisms (SNPs) were genotyped using Affymetrix Genome-Wide Human SNP array 6.0 chips. In the replication stage, 205 Japanese ASD cases and 184 healthy controls, as well as 418 Chinese Han trios (n?=?1,254), were genotyped by TaqMan platform. Case–control analysis, family based association test, and transmission/disequilibrium test (TDT) were then conducted to test the association. In the discovery stage, significant associations were suggested for 14 loci, including 5 known ASD candidate genes: GPC6, JARID2, YTHDC2, CNTN4, and CSMD1. In addition, significant associations were identified for several novel genes with intriguing functions, such as JPH3, PTPRD, CUX1, and RIT2. After a meta-analysis combining the Japanese replication samples, the strongest signal was found at rs16976358 (P?=?6.04 × 10?7), which is located near the RIT2 gene. In summary, our results provide independent support to known ASD candidate genes and highlight a number of novel genes warranted to be further investigated in a larger sample set in an effort to improve our understanding of the genetic basis of ASD. Autism Res 2016, 9: 340–349. © 2015 International Society for Autism Research, Wiley Periodicals, Inc. En ligne : http://dx.doi.org/10.1002/aur.1536 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=285 [article] Genome-wide Association Study of Autism Spectrum Disorder in the East Asian Populations [Texte imprimé et/ou numérique] / Xiaoxi LIU, Auteur ; Takafumi SHIMADA, Auteur ; Takeshi OTOWA, Auteur ; Yu-Yu WU, Auteur ; Yoshiya KAWAMURA, Auteur ; Mamoru TOCHIGI, Auteur ; Yasuhide IWATA, Auteur ; Tadashi UMEKAGE, Auteur ; Tomoko TOYOTA, Auteur ; Motoko MAEKAWA, Auteur ; Yoshimi IWAYAMA, Auteur ; Katsuaki SUZUKI, Auteur ; Chihiro KAKIUCHI, Auteur ; Hitoshi KUWABARA, Auteur ; Yukiko KANO, Auteur ; Hisami NISHIDA, Auteur ; Toshiro SUGIYAMA, Auteur ; Nobumasa KATO, Auteur ; Chia-Hsiang CHEN, Auteur ; Norio MORI, Auteur ; Kazuo YAMADA, Auteur ; Takeo YOSHIKAWA, Auteur ; Kiyoto KASAI, Auteur ; Katsushi TOKUNAGA, Auteur ; Tsukasa SASAKI, Auteur ; Susan Shur-Fen GAU, Auteur . - p.340-349. Langues : Anglais (eng) in Autism Research > 9-3 (March 2016) . - p.340-349 Mots-clés : autism  autism spectrum disorder  genome-wide association study  genetics  common variation Index. décimale : PER Périodiques Résumé : Autism spectrum disorder is a heterogeneous neurodevelopmental disorder with strong genetic basis. To identify common genetic variations conferring the risk of ASD, we performed a two-stage genome-wide association study using ASD family and healthy control samples obtained from East Asian populations. A total of 166 ASD families (n?=?500) and 642 healthy controls from the Japanese population were used as the discovery cohort. Approximately 900,000 single nucleotide polymorphisms (SNPs) were genotyped using Affymetrix Genome-Wide Human SNP array 6.0 chips. In the replication stage, 205 Japanese ASD cases and 184 healthy controls, as well as 418 Chinese Han trios (n?=?1,254), were genotyped by TaqMan platform. Case–control analysis, family based association test, and transmission/disequilibrium test (TDT) were then conducted to test the association. In the discovery stage, significant associations were suggested for 14 loci, including 5 known ASD candidate genes: GPC6, JARID2, YTHDC2, CNTN4, and CSMD1. In addition, significant associations were identified for several novel genes with intriguing functions, such as JPH3, PTPRD, CUX1, and RIT2. After a meta-analysis combining the Japanese replication samples, the strongest signal was found at rs16976358 (P?=?6.04 × 10?7), which is located near the RIT2 gene. In summary, our results provide independent support to known ASD candidate genes and highlight a number of novel genes warranted to be further investigated in a larger sample set in an effort to improve our understanding of the genetic basis of ASD. Autism Res 2016, 9: 340–349. © 2015 International Society for Autism Research, Wiley Periodicals, Inc. En ligne : http://dx.doi.org/10.1002/aur.1536 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=285

Increased plasma lipoprotein lipase activity in males with autism spectrum disorder / Takaharu HIRAI in Research in Autism Spectrum Disorders, 77 (September 2020)  

Public ISBD [article]  inResearch in Autism Spectrum Disorders > 77 (September 2020) . - 101630 Titre : Increased plasma lipoprotein lipase activity in males with autism spectrum disorder Type de document : Texte imprimé et/ou numérique Auteurs : Takaharu HIRAI, Auteur ; Noriyoshi USUI, Auteur ; Keiko IWATA, Auteur ; Taishi MIYACHI, Auteur ; Kenji J. TSUCHIYA, Auteur ; Min-Jue XIE, Auteur ; Kazuhiko NAKAMURA, Auteur ; Masatsugu TSUJII, Auteur ; Toshiro SUGIYAMA, Auteur ; Hideo MATSUZAKI, Auteur Article en page(s) : 101630 Langues : Anglais (eng) Mots-clés : Autism spectrum disorder  Lipoprotein lipase  GPIHBP1  Lipid metabolism  ADI-R Index. décimale : PER Périodiques Résumé : Background Autism spectrum disorder (ASD) is a neurodevelopmental disorder with complex genetics, characterized by impaired social communication and repetitive behaviors and interests. The involvement of lipid metabolism in ASD pathophysiology has been demonstrated in previous studies; however, the molecular mechanisms of abnormal lipid metabolism are not fully understood. A mutation in Lipoprotein lipase (LPL), which has central roles in lipid metabolism, has been identified in patients with ASD. We have reported that Lpl is downregulated in ASD model mice. Therefore, we explored the role of LPL in lipid metabolism in ASD patients. Methods We quantified LPL amount, LPL activity, and glycosylphosphatidylinositol-anchored high-density lipoprotein-binding protein 1 (GPIHBP1) amount in the plasma of ASD male subjects (n = 28) compared with typical development (TD) controls (n = 28), using enzyme-linked immunosorbent assay for LPL amount and fluorometric assays for LPL activity. We examined the correlations of plasma LPL with GPIHBP1 and clinical characteristic scores from the Autism Diagnostic Interview-Revised (ADI-R). Results There was higher LPL activity, but not LPL amount, in the plasma of ASD subjects compared with controls. Receiver operating characteristics analysis also demonstrated that pure LPL activity (LPL activity/LPL amount) is a useful indicator to distinguish ASD from TD controls. There were no correlations between plasma LPL and ADI-R scores; however, LPL activity was negatively correlated with GPIHBP1 levels in the plasma of ASD subjects. Conclusions Our results demonstrate increased activity of plasma LPL, regulated by GPIHBP1, in ASD, providing novel insights into the lipid metabolism associated with ASD pathophysiology. En ligne : https://doi.org/10.1016/j.rasd.2020.101630 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=432 [article] Increased plasma lipoprotein lipase activity in males with autism spectrum disorder [Texte imprimé et/ou numérique] / Takaharu HIRAI, Auteur ; Noriyoshi USUI, Auteur ; Keiko IWATA, Auteur ; Taishi MIYACHI, Auteur ; Kenji J. TSUCHIYA, Auteur ; Min-Jue XIE, Auteur ; Kazuhiko NAKAMURA, Auteur ; Masatsugu TSUJII, Auteur ; Toshiro SUGIYAMA, Auteur ; Hideo MATSUZAKI, Auteur . - 101630. Langues : Anglais (eng) in Research in Autism Spectrum Disorders > 77 (September 2020) . - 101630 Mots-clés : Autism spectrum disorder  Lipoprotein lipase  GPIHBP1  Lipid metabolism  ADI-R Index. décimale : PER Périodiques Résumé : Background Autism spectrum disorder (ASD) is a neurodevelopmental disorder with complex genetics, characterized by impaired social communication and repetitive behaviors and interests. The involvement of lipid metabolism in ASD pathophysiology has been demonstrated in previous studies; however, the molecular mechanisms of abnormal lipid metabolism are not fully understood. A mutation in Lipoprotein lipase (LPL), which has central roles in lipid metabolism, has been identified in patients with ASD. We have reported that Lpl is downregulated in ASD model mice. Therefore, we explored the role of LPL in lipid metabolism in ASD patients. Methods We quantified LPL amount, LPL activity, and glycosylphosphatidylinositol-anchored high-density lipoprotein-binding protein 1 (GPIHBP1) amount in the plasma of ASD male subjects (n = 28) compared with typical development (TD) controls (n = 28), using enzyme-linked immunosorbent assay for LPL amount and fluorometric assays for LPL activity. We examined the correlations of plasma LPL with GPIHBP1 and clinical characteristic scores from the Autism Diagnostic Interview-Revised (ADI-R). Results There was higher LPL activity, but not LPL amount, in the plasma of ASD subjects compared with controls. Receiver operating characteristics analysis also demonstrated that pure LPL activity (LPL activity/LPL amount) is a useful indicator to distinguish ASD from TD controls. There were no correlations between plasma LPL and ADI-R scores; however, LPL activity was negatively correlated with GPIHBP1 levels in the plasma of ASD subjects. Conclusions Our results demonstrate increased activity of plasma LPL, regulated by GPIHBP1, in ASD, providing novel insights into the lipid metabolism associated with ASD pathophysiology. En ligne : https://doi.org/10.1016/j.rasd.2020.101630 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=432

Investigation of the serum levels of anterior pituitary hormones in male children with autism / Keiko IWATA in Molecular Autism, (October 2011)  

Public ISBD [article]  inMolecular Autism > (October 2011) . - 6 p. Titre : Investigation of the serum levels of anterior pituitary hormones in male children with autism Type de document : Texte imprimé et/ou numérique Auteurs : Keiko IWATA, Auteur ; Hideo MATSUZAKI, Auteur ; Taishi MIYACHI, Auteur ; Chie SHIMMURA, Auteur ; Shiro SUDA, Auteur ; Kenji J. TSUCHIYA, Auteur ; Kaori MATSUMOTO, Auteur ; Katsuaki SUZUKI, Auteur ; Yasuhide IWATA, Auteur ; Kazuhiko NAKAMURA, Auteur ; Masatsugu TSUJII, Auteur ; Toshiro SUGIYAMA, Auteur ; Kohji SATO, Auteur ; Norio MORI, Auteur Année de publication : 2011 Article en page(s) : 6 p. Langues : Anglais (eng) Index. décimale : PER Périodiques Résumé : BACKGROUND:The neurobiological basis of autism remains poorly understood. The diagnosis of autism is based solely on behavioural characteristics because there are currently no reliable biological markers. To test whether the anterior pituitary hormones and cortisol could be useful as biological markers for autism, we assessed the basal serum levels of these hormones in subjects with autism and normal controls.FINDINGS:Using a suspension array system, we determined the serum levels of six anterior pituitary hormones, including adrenocorticotropic hormone and growth hormone, in 32 drug-naive subjects (aged 6 to 18 years, all boys) with autism, and 34 healthy controls matched for age and gender. We also determined cortisol levels in these subjects by enzyme-linked immunosorbent assay. Serum levels of adrenocorticotropic hormone, growth hormone and cortisol were significantly higher in subjects with autism than in controls. In addition, there was a significantly positive correlation between cortisol and adrenocorticotropic hormone levels in autism.CONCLUSION:Our results suggest that increased basal serum levels of adrenocorticotropic hormone accompanied by increased cortisol and growth hormone may be useful biological markers for autism. En ligne : http://dx.doi.org/10.1186/2040-2392-2-16 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=149 [article] Investigation of the serum levels of anterior pituitary hormones in male children with autism [Texte imprimé et/ou numérique] / Keiko IWATA, Auteur ; Hideo MATSUZAKI, Auteur ; Taishi MIYACHI, Auteur ; Chie SHIMMURA, Auteur ; Shiro SUDA, Auteur ; Kenji J. TSUCHIYA, Auteur ; Kaori MATSUMOTO, Auteur ; Katsuaki SUZUKI, Auteur ; Yasuhide IWATA, Auteur ; Kazuhiko NAKAMURA, Auteur ; Masatsugu TSUJII, Auteur ; Toshiro SUGIYAMA, Auteur ; Kohji SATO, Auteur ; Norio MORI, Auteur . - 2011 . - 6 p. Langues : Anglais (eng) in Molecular Autism > (October 2011) . - 6 p. Index. décimale : PER Périodiques Résumé : BACKGROUND:The neurobiological basis of autism remains poorly understood. The diagnosis of autism is based solely on behavioural characteristics because there are currently no reliable biological markers. To test whether the anterior pituitary hormones and cortisol could be useful as biological markers for autism, we assessed the basal serum levels of these hormones in subjects with autism and normal controls.FINDINGS:Using a suspension array system, we determined the serum levels of six anterior pituitary hormones, including adrenocorticotropic hormone and growth hormone, in 32 drug-naive subjects (aged 6 to 18 years, all boys) with autism, and 34 healthy controls matched for age and gender. We also determined cortisol levels in these subjects by enzyme-linked immunosorbent assay. Serum levels of adrenocorticotropic hormone, growth hormone and cortisol were significantly higher in subjects with autism than in controls. In addition, there was a significantly positive correlation between cortisol and adrenocorticotropic hormone levels in autism.CONCLUSION:Our results suggest that increased basal serum levels of adrenocorticotropic hormone accompanied by increased cortisol and growth hormone may be useful biological markers for autism. En ligne : http://dx.doi.org/10.1186/2040-2392-2-16 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=149

Psychometric properties of the Repetitive Behavior Scale-Revised for individuals with autism spectrum disorder in Japan / Naoko INADA in Research in Autism Spectrum Disorders, 15-16 (July 2015)  

Public ISBD [article]  inResearch in Autism Spectrum Disorders > 15-16 (July 2015) . - p.60-68 Titre : Psychometric properties of the Repetitive Behavior Scale-Revised for individuals with autism spectrum disorder in Japan Type de document : Texte imprimé et/ou numérique Auteurs : Naoko INADA, Auteur ; Hiroyuki ITO, Auteur ; Kazuhiro YASUNAGA, Auteur ; Miho KURODA, Auteur ; Ryoichiro IWANAGA, Auteur ; Taku HAGIWARA, Auteur ; Iori TANI, Auteur ; Ryoji YUKIHIRO, Auteur ; Tokio UCHIYAMA, Auteur ; Kei OGASAHARA, Auteur ; Koichi HARA, Auteur ; Masahiko INOUE, Auteur ; Takashi MURAKAMI, Auteur ; Fumio SOMEKI, Auteur ; Kazuhiko NAKAMURA, Auteur ; Toshiro SUGIYAMA, Auteur ; Hiroyuki UCHIDA, Auteur ; Hironobu ICHIKAWA, Auteur ; Yuki KAWAKUBO, Auteur ; Yukiko KANO, Auteur ; Masatsugu TSUJII, Auteur Article en page(s) : p.60-68 Langues : Anglais (eng) Mots-clés : Restricted and repetitive behaviors  Autism spectrum disorder  Repetitive Behavior Scale-Revised Japanese Version  Reliability  Validity Index. décimale : PER Périodiques Résumé : Restricted and repetitive behaviors (RRBs) constitute a core symptom of autism spectrum disorder (ASD). The Repetitive Behavior Scale-Revised (RBS-R) is a widely used questionnaire administered by parents or caregivers to assess RRBs in individuals with ASD. This study evaluated the psychometric properties of the RBS-R Japanese Version (RBS-R-J). The ASD and non-ASD groups comprised 274 and 36 participants, respectively. We examined corrected item-total correlation, Cronbach's alpha, and RBS-R-J scores of different diagnostic groups, as well as correlations between RBS-R-J scores and intelligence quotient (IQ), autistic symptoms, adaptive/maladaptive functioning, aberrant behaviors, and sensory processing. All items showed moderate corrected item-total correlations. Cronbach's alpha coefficient was .93. We found significant differences in the mean RBS-R-J scores of the low-functioning ASD group and the intellectual disabilities group, and of low-functioning and high-functioning ASD groups. RBS-R-J scores negatively correlated with IQ and scores on the Sensory Profile (Japanese version) and Adaptive Behavior Composite of the Maladaptive Behavior Index of the Vineland Adaptive Behavior Scales-Second Edition (VABS-II; Japanese version), but positively correlated with scores on the peak and current symptoms subscales of the Pervasive Developmental Disorders Autism Society Japan Rating Scale, the VABS-II, and the Aberrant Behavior Checklist-Community (Japanese version). From these results, we conclude that RBS-R-J showed good reliability, diagnostic validity, and convergent validity, indicating that it is a reliable, valid instrument for use among ASD individuals in clinical and research settings. En ligne : http://dx.doi.org/10.1016/j.rasd.2015.01.002 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=261 [article] Psychometric properties of the Repetitive Behavior Scale-Revised for individuals with autism spectrum disorder in Japan [Texte imprimé et/ou numérique] / Naoko INADA, Auteur ; Hiroyuki ITO, Auteur ; Kazuhiro YASUNAGA, Auteur ; Miho KURODA, Auteur ; Ryoichiro IWANAGA, Auteur ; Taku HAGIWARA, Auteur ; Iori TANI, Auteur ; Ryoji YUKIHIRO, Auteur ; Tokio UCHIYAMA, Auteur ; Kei OGASAHARA, Auteur ; Koichi HARA, Auteur ; Masahiko INOUE, Auteur ; Takashi MURAKAMI, Auteur ; Fumio SOMEKI, Auteur ; Kazuhiko NAKAMURA, Auteur ; Toshiro SUGIYAMA, Auteur ; Hiroyuki UCHIDA, Auteur ; Hironobu ICHIKAWA, Auteur ; Yuki KAWAKUBO, Auteur ; Yukiko KANO, Auteur ; Masatsugu TSUJII, Auteur . - p.60-68. Langues : Anglais (eng) in Research in Autism Spectrum Disorders > 15-16 (July 2015) . - p.60-68 Mots-clés : Restricted and repetitive behaviors  Autism spectrum disorder  Repetitive Behavior Scale-Revised Japanese Version  Reliability  Validity Index. décimale : PER Périodiques Résumé : Restricted and repetitive behaviors (RRBs) constitute a core symptom of autism spectrum disorder (ASD). The Repetitive Behavior Scale-Revised (RBS-R) is a widely used questionnaire administered by parents or caregivers to assess RRBs in individuals with ASD. This study evaluated the psychometric properties of the RBS-R Japanese Version (RBS-R-J). The ASD and non-ASD groups comprised 274 and 36 participants, respectively. We examined corrected item-total correlation, Cronbach's alpha, and RBS-R-J scores of different diagnostic groups, as well as correlations between RBS-R-J scores and intelligence quotient (IQ), autistic symptoms, adaptive/maladaptive functioning, aberrant behaviors, and sensory processing. All items showed moderate corrected item-total correlations. Cronbach's alpha coefficient was .93. We found significant differences in the mean RBS-R-J scores of the low-functioning ASD group and the intellectual disabilities group, and of low-functioning and high-functioning ASD groups. RBS-R-J scores negatively correlated with IQ and scores on the Sensory Profile (Japanese version) and Adaptive Behavior Composite of the Maladaptive Behavior Index of the Vineland Adaptive Behavior Scales-Second Edition (VABS-II; Japanese version), but positively correlated with scores on the peak and current symptoms subscales of the Pervasive Developmental Disorders Autism Society Japan Rating Scale, the VABS-II, and the Aberrant Behavior Checklist-Community (Japanese version). From these results, we conclude that RBS-R-J showed good reliability, diagnostic validity, and convergent validity, indicating that it is a reliable, valid instrument for use among ASD individuals in clinical and research settings. En ligne : http://dx.doi.org/10.1016/j.rasd.2015.01.002 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=261

The risk factors for criminal behaviour in high-functioning autism spectrum disorders (HFASDs): A comparison of childhood adversities between individuals with HFASDs who exhibit criminal behaviour and those with HFASD and no criminal histories / Chihiro KAWAKAMI in Research in Autism Spectrum Disorders, 6-2 (April-June 2012)  

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Validation of an interview-based rating scale developed in Japan for pervasive developmental disorders / Hiroyuki ITO in Research in Autism Spectrum Disorders, 6-4 (October-December 2012)  

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