1
|
Fernandes HDB, Oliveira BDS, Machado CA, Carvalho BC, de Brito Toscano EC, da Silva MCM, Vieira ÉLM, de Oliveira ACP, Teixeira AL, de Miranda AS, da Silva AM. Behavioral, neurochemical and neuroimmune features of RasGEF1b deficient mice. Prog Neuropsychopharmacol Biol Psychiatry 2024; 129:110908. [PMID: 38048936 DOI: 10.1016/j.pnpbp.2023.110908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 11/02/2023] [Accepted: 11/28/2023] [Indexed: 12/06/2023]
Abstract
The factor RasGEF1b is a Ras guanine exchange factor involved in immune responses. Studies have also implicated RasGEF1b in the CNS development. It is still limited the understanding of the role of RasGEF1b in CNS functioning. Using RasGEF1b deficient mice (RasGEF1b-cKO), we investigated the impact of this gene deletion in behavior, cognition, brain neurochemistry and microglia morphology. We showed that RasGEF1b-cKO mice display spontaneous hyperlocomotion and anhedonia. RasGEF1b-cKO mice also exhibited compulsive-like behavior that was restored after acute treatment with the selective serotonin reuptake inhibitor (SSRI) fluoxetine (5 mg/kg). A down-regulation of mRNA of dopamine receptor (Drd1, Drd2, Drd4 and Drd5) and serotonin receptor genes (5Htr1a, 5Htr1b and 5Htr1d) was observed in hippocampus of RasGEF1b-cKO mice. These mice also had reduction of Drd1 and Drd2 in prefrontal cortex and 5Htr1d in striatum. In addition, morphological alterations were observed in RasGEF1b deficient microglia along with decreased levels of hippocampal BDNF. We provided original evidence that the deletion of RasGEF1b leads to unique behavioral features, implicating this factor in CNS functioning.
Collapse
Affiliation(s)
- Heliana de Barros Fernandes
- Laboratório de Genes Inflamatórios, Departamento de Morfologia, Universidade Federal de Minas Gerais, Av. Presidente Antônio Carlos, 6627, Pampulha, CEP: 31270-901, Belo Horizonte, MG, Brazil; Laboratório de Neurobiologia, Departamento de Morfologia, Universidade Federal de Minas Gerais, Av. Presidente Antônio Carlos, 6627, Pampulha, CEP: 31270-901, Belo Horizonte, MG, Brazil.
| | - Bruna da Silva Oliveira
- Laboratório de Neurobiologia, Departamento de Morfologia, Universidade Federal de Minas Gerais, Av. Presidente Antônio Carlos, 6627, Pampulha, CEP: 31270-901, Belo Horizonte, MG, Brazil
| | - Caroline Amaral Machado
- Laboratório de Neurobiologia, Departamento de Morfologia, Universidade Federal de Minas Gerais, Av. Presidente Antônio Carlos, 6627, Pampulha, CEP: 31270-901, Belo Horizonte, MG, Brazil
| | - Brener Cunha Carvalho
- Laboratório de Genes Inflamatórios, Departamento de Morfologia, Universidade Federal de Minas Gerais, Av. Presidente Antônio Carlos, 6627, Pampulha, CEP: 31270-901, Belo Horizonte, MG, Brazil
| | - Eliana Cristina de Brito Toscano
- Laboratório Integrado de Pesquisas em Patologia, Departamento de Patologia, Faculdade de Medicina, Universidade Federal de Juiz de Fora, Av. Eugênio do Nascimento, s/n°, Dom Bosco, CEP: 36038-330, Juiz de Fora, MG, Brazil
| | - Maria Carolina M da Silva
- Laboratório de Neurofarmacologia, Departamento de Fisiologia e Farmacologia, Universidade Federal de Minas Gerais, Av. Presidente Antônio Carlos, 6627, Pampulha, CEP: 31270-901, Belo Horizonte, MG, Brazil
| | - Érica Leandro Marciano Vieira
- Campbell Family Mental Health Research Institute, Center of Addiction and Mental Health, 250 College Street, Toronto, ON M5T 1R8, Canada
| | - Antônio Carlos Pinheiro de Oliveira
- Laboratório de Neurofarmacologia, Departamento de Fisiologia e Farmacologia, Universidade Federal de Minas Gerais, Av. Presidente Antônio Carlos, 6627, Pampulha, CEP: 31270-901, Belo Horizonte, MG, Brazil
| | - Antônio Lúcio Teixeira
- Departament of Psychiatry and Behavioral Science McGovern School, Behavioral and Biomedical Sciences Building (BBSB), The University of Texas Health Science Center, 941 East Road, Houston, TX 77054, United States of America
| | - Aline Silva de Miranda
- Laboratório de Neurobiologia, Departamento de Morfologia, Universidade Federal de Minas Gerais, Av. Presidente Antônio Carlos, 6627, Pampulha, CEP: 31270-901, Belo Horizonte, MG, Brazil
| | - Aristóbolo Mendes da Silva
- Laboratório de Genes Inflamatórios, Departamento de Morfologia, Universidade Federal de Minas Gerais, Av. Presidente Antônio Carlos, 6627, Pampulha, CEP: 31270-901, Belo Horizonte, MG, Brazil
| |
Collapse
|
2
|
Tran TM, Sherwood JK, Doolittle MJ, Sathler MF, Hofmann F, Stone-Roy LM, Kim S. Loss of cGMP-dependent protein kinase II alters ultrasonic vocalizations in mice, a model for speech impairment in human microdeletion 4q21 syndrome. Neurosci Lett 2021; 759:136048. [PMID: 34126178 DOI: 10.1016/j.neulet.2021.136048] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Revised: 06/09/2021] [Accepted: 06/09/2021] [Indexed: 10/21/2022]
Abstract
Chromosome 4q21 microdeletion leads to a human syndrome that exhibits restricted growth, facial dysmorphisms, mental retardation, and absent or delayed speech. One of the key genes in the affected region of the chromosome is PRKG2, which encodes cGMP-dependent protein kinase II (cGKII). Mice lacking cGKII exhibit restricted growth and deficits in learning and memory, as seen in the human syndrome. However, vocalization impairments in these mice have not been determined. The molecular pathway underlying vocalization impairment in humans is not fully understood. Here, we employed cGKII knockout (KO) mice as a model for the human microdeletion syndrome to test whether vocalizations are affected by loss of the PRKG2 gene. Mice emit ultrasonic vocalizations (USVs) to communicate in social situations, stress, and isolation. We thus recorded ultrasonic vocalizations as a model for human speech. We isolated postnatal day 5-7 pups from the nest to record and analyze USVs and found significant differences in vocalizations of KO mice relative to wild-type and heterozygous mutant mice. KO mice produced fewer calls that were shorter duration and higher frequency. Because neuronal activation in the arcuate nucleus in the hypothalamus is important for the production of animal USVs following isolation from the nest, we assessed neuronal activity in the arcuate nucleus of KO pups following isolation. We found significant reduction of neuronal activation in cGKII KO pups after isolation. Taken together, our studies indicate that cGKII is important for neuronal activation in the arcuate nucleus, which significantly contributes to the production of USVs in neonatal mice. We further suggest cGKII KO mice can be a valuable animal model to investigate pathophysiology of human microdeletion 4q21 syndrome.
Collapse
Affiliation(s)
- Tiffany M Tran
- Department of Biomedical Sciences, Colorado State University, Fort Collins, CO 80523, USA
| | - Jessica K Sherwood
- Department of Biomedical Sciences, Colorado State University, Fort Collins, CO 80523, USA
| | - Michael J Doolittle
- Molecular, Cellular and Integrative Neurosciences Program, Colorado State University, Fort Collins, CO 80523, USA
| | - Matheus F Sathler
- Department of Biomedical Sciences, Colorado State University, Fort Collins, CO 80523, USA
| | | | - Leslie M Stone-Roy
- Department of Biomedical Sciences, Colorado State University, Fort Collins, CO 80523, USA; Molecular, Cellular and Integrative Neurosciences Program, Colorado State University, Fort Collins, CO 80523, USA.
| | - Seonil Kim
- Department of Biomedical Sciences, Colorado State University, Fort Collins, CO 80523, USA; Molecular, Cellular and Integrative Neurosciences Program, Colorado State University, Fort Collins, CO 80523, USA.
| |
Collapse
|
3
|
Lashkari HP, Andey NVS, Kumar N, Girisha KM. Myelomonocytic leukaemia (JMML) in a child with intellectual disability and chromosome 4q deletion. PEDIATRIC HEMATOLOGY ONCOLOGY JOURNAL 2021. [DOI: 10.1016/j.phoj.2021.03.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
|
4
|
Smit DJA, Wright MJ, Meyers JL, Martin NG, Ho YYW, Malone SM, Zhang J, Burwell SJ, Chorlian DB, de Geus EJC, Denys D, Hansell NK, Hottenga J, McGue M, van Beijsterveldt CEM, Jahanshad N, Thompson PM, Whelan CD, Medland SE, Porjesz B, Lacono WG, Boomsma DI. Genome-wide association analysis links multiple psychiatric liability genes to oscillatory brain activity. Hum Brain Mapp 2018; 39:4183-4195. [PMID: 29947131 PMCID: PMC6179948 DOI: 10.1002/hbm.24238] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 04/26/2018] [Accepted: 05/21/2018] [Indexed: 02/02/2023] Open
Abstract
Oscillatory activity is crucial for information processing in the brain, and has a long history as a biomarker for psychopathology. Variation in oscillatory activity is highly heritable, but current understanding of specific genetic influences remains limited. We performed the largest genome-wide association study to date of oscillatory power during eyes-closed resting electroencephalogram (EEG) across a range of frequencies (delta 1-3.75 Hz, theta 4-7.75 Hz, alpha 8-12.75 Hz, and beta 13-30 Hz) in 8,425 subjects. Additionally, we performed KGG positional gene-based analysis and brain-expression analyses. GABRA2-a known genetic marker for alcohol use disorder and epilepsy-significantly affected beta power, consistent with the known relation between GABAA interneuron activity and beta oscillations. Tissue-specific SNP-based imputation of gene-expression levels based on the GTEx database revealed that hippocampal GABRA2 expression may mediate this effect. Twenty-four genes at 3p21.1 were significant for alpha power (FDR q < .05). SNPs in this region were linked to expression of GLYCTK in hippocampal tissue, and GNL3 and ITIH4 in the frontal cortex-genes that were previously implicated in schizophrenia and bipolar disorder. In sum, we identified several novel genetic variants associated with oscillatory brain activity; furthermore, we replicated and advanced understanding of previously known genes associated with psychopathology (i.e., schizophrenia and alcohol use disorders). Importantly, these psychopathological liability genes affect brain functioning, linking the genes' expression to specific cortical/subcortical brain regions.
Collapse
Affiliation(s)
- Dirk J. A. Smit
- Psychiatry departmentAmsterdam Neuroscience, Academic Medical Center, University of AmsterdamThe Netherlands
| | - Margaret J. Wright
- Queensland Brain Institute, University of QueenslandBrisbaneAustralia
- Centre of Advanced Imaging, University QueenslandBrisbaneAustralia
| | - Jacquelyn L. Meyers
- Henri Begleiter Neurodynamics Lab., Department of PsychiatryState University of New York Downstate Medical CenterBrooklynNew York
| | | | | | | | - Jian Zhang
- Henri Begleiter Neurodynamics Lab., Department of PsychiatryState University of New York Downstate Medical CenterBrooklynNew York
| | - Scott J. Burwell
- Department of PsychologyUniversity of MinnesotaMinneapolisMinnesota
| | - David B. Chorlian
- Henri Begleiter Neurodynamics Lab., Department of PsychiatryState University of New York Downstate Medical CenterBrooklynNew York
| | - Eco J. C. de Geus
- Biological Psychology, Amsterdam Public Health research institute, Vrije Universiteit AmsterdamThe Netherlands
| | - Damiaan Denys
- Psychiatry departmentAmsterdam Neuroscience, Academic Medical Center, University of AmsterdamThe Netherlands
| | | | - Jouke‐Jan Hottenga
- Biological Psychology, Amsterdam Public Health research institute, Vrije Universiteit AmsterdamThe Netherlands
| | - Matt McGue
- Department of PsychologyUniversity of MinnesotaMinneapolisMinnesota
| | | | - Neda Jahanshad
- Imaging Genetics Center, USC Mark and Mary Stevens Neuroimaging and Informatics Institute, Keck School of Medicine of University of Southern CaliforniaMarina del ReyCalifornia
| | - Paul M. Thompson
- Imaging Genetics Center, USC Mark and Mary Stevens Neuroimaging and Informatics Institute, Keck School of Medicine of University of Southern CaliforniaMarina del ReyCalifornia
| | - Christopher D. Whelan
- Imaging Genetics Center, USC Mark and Mary Stevens Neuroimaging and Informatics Institute, Keck School of Medicine of University of Southern CaliforniaMarina del ReyCalifornia
| | | | - Bernice Porjesz
- Henri Begleiter Neurodynamics Lab., Department of PsychiatryState University of New York Downstate Medical CenterBrooklynNew York
| | | | - Dorret I. Boomsma
- Biological Psychology, Amsterdam Public Health research institute, Vrije Universiteit AmsterdamThe Netherlands
| |
Collapse
|
5
|
Iourov IY, Zelenova MA, Vorsanova SG, Voinova VV, Yurov YB. 4q21.2q21.3 Duplication: Molecular and Neuropsychological Aspects. Curr Genomics 2018; 19:173-178. [PMID: 29606904 PMCID: PMC5850505 DOI: 10.2174/1389202918666170717161426] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2016] [Revised: 11/20/2016] [Accepted: 01/20/2017] [Indexed: 12/15/2022] Open
Abstract
During the last decades, a large amount of newly described microduplications and microdeletions associated with intellectual disability (ID) and related neuropsychiatric diseases have been discovered. However, due to natural limitations, a significant part of them has not been the focus of multidisciplinary approaches. Here, we address previously undescribed chromosome 4q21.2q21.3 microduplication for gene prioritization, evaluation of cognitive abilities and estimation of genomic mechanisms for brain dysfunction by molecular cytogenetic (cytogenomic) and gene expression (meta-) analyses as well as for neuropsychological assessment. We showed that duplication at 4q21.2q21.3 is associated with moderate ID, cognitive deficits, developmental delay, language impairment, memory and attention problems, facial dysmorphisms, congenital heart defect and dentinogenesis imperfecta. Gene-expression meta-analysis prioritized the following genes: ENOPH1, AFF1, DSPP, SPARCL1, and SPP1. Furthermore, genotype/phenotype correlations allowed the attribution of each gene gain to each phenotypic feature. Neuropsychological testing showed visual-perceptual and fine motor skill deficits, reduced attention span, deficits of the nominative function and problems in processing both visual and aural information. Finally, emerging approaches including molecular cytogenetic, bioinformatic (genome/epigenome meta-analysis) and neuropsychological methods are concluded to be required for comprehensive neurological, genetic and neuropsychological descriptions of new genomic rearrangements/diseases associated with ID.
Collapse
Affiliation(s)
- Ivan Y Iourov
- Mental Health Research Center, Moscow, Russian Federation.,Separated Structural Unit "Clinical Research Institute of Pediatrics named after Y.E Veltishev", Pirogov Russian National Research Medical University, Ministry of Health, Moscow, Russian Federation.,Department of Medical Genetics, Russian Medical Academy of Postgraduate Education, Ministry of Health, Moscow, Russian Federation
| | - Maria A Zelenova
- Mental Health Research Center, Moscow, Russian Federation.,Separated Structural Unit "Clinical Research Institute of Pediatrics named after Y.E Veltishev", Pirogov Russian National Research Medical University, Ministry of Health, Moscow, Russian Federation.,Moscow State University of Psychology and Education, Moscow, Russian Federation
| | - Svetlana G Vorsanova
- Mental Health Research Center, Moscow, Russian Federation.,Separated Structural Unit "Clinical Research Institute of Pediatrics named after Y.E Veltishev", Pirogov Russian National Research Medical University, Ministry of Health, Moscow, Russian Federation.,Moscow State University of Psychology and Education, Moscow, Russian Federation
| | - Victoria V Voinova
- Mental Health Research Center, Moscow, Russian Federation.,Separated Structural Unit "Clinical Research Institute of Pediatrics named after Y.E Veltishev", Pirogov Russian National Research Medical University, Ministry of Health, Moscow, Russian Federation.,Moscow State University of Psychology and Education, Moscow, Russian Federation
| | - Yuri B Yurov
- Mental Health Research Center, Moscow, Russian Federation.,Separated Structural Unit "Clinical Research Institute of Pediatrics named after Y.E Veltishev", Pirogov Russian National Research Medical University, Ministry of Health, Moscow, Russian Federation.,Moscow State University of Psychology and Education, Moscow, Russian Federation
| |
Collapse
|
6
|
Zarrei M, Merico D, Kellam B, Engchuan W, Scriver T, Jokhan R, Wilson MD, Parr J, Lemire EG, Stavropoulos DJ, Scherer SW. A de novo deletion in a boy with cerebral palsy suggests a refined critical region for the 4q21.22 microdeletion syndrome. Am J Med Genet A 2017; 173:1287-1293. [PMID: 28371330 DOI: 10.1002/ajmg.a.38176] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Revised: 01/14/2017] [Accepted: 01/18/2017] [Indexed: 01/03/2023]
Abstract
We present an 18-year-old boy with cerebral palsy, intellectual disability, speech delay, and seizures. He carries a likely pathogenic 1.3 Mb de novo heterozygous deletion in the 4q21.22 microdeletion syndrome region. He also carries a 436 kb maternally-inherited duplication impacting the first three exons of CHRNA7. The majority of previously published cases with 4q21.22 syndrome shared common features including growth restriction, muscular hypotonia, and absent or severely delayed speech. Using copy number variation (CNV) data available for other subjects, we defined a minimal critical region of 170.8 kb within the syndromic region, encompassing HNRNPD. We also identified a larger 2 Mb critical region encompassing ten protein-coding genes, of which six (PRKG2, RASGEF1B, HNRNPDL, HNRNPD, LIN54, COPS4) have a significantly low number of truncating loss-of-function mutations. Long-range chromatin interaction data suggest that this deletion may alter chromatin interactions at the 4q21.22 microdeletion region. We suggest that the deletion or misregulation of these genes is likely to contribute to the neurodevelopmental and neuromuscular abnormalities in 4q21.22 syndrome.
Collapse
Affiliation(s)
- Mehdi Zarrei
- The Centre for Applied Genomics and Program in Genetics and Genome Biology, The Hospital for Sick Children, Toronto, Ontario, Canada
| | | | - Barbara Kellam
- The Centre for Applied Genomics and Program in Genetics and Genome Biology, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Worrawat Engchuan
- The Centre for Applied Genomics and Program in Genetics and Genome Biology, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Tara Scriver
- Royal University Hospital, Saskatoon, Saskatchewan, Canada
| | - Rikash Jokhan
- Yorkton Regional Health Center, Yorkton, Saskatchewan, Canada
| | - Michael D Wilson
- Genetics and Genome Biology, The Hospital for Sick Children, Toronto, Ontario, Canada.,Department of Molecular Genetics and McLaughlin Centre, University of Toronto, Toronto, Ontario, Canada
| | - Jeremy Parr
- Institute of Neuroscience, Newcastle University, Newcastle Upon Tyne, UK
| | - Edmond G Lemire
- Department of Pediatrics, Royal University Hospital, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Dimitri J Stavropoulos
- Department of Pediatric Laboratory Medicine, Cytogenetics Laboratory, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Stephen W Scherer
- The Centre for Applied Genomics and Program in Genetics and Genome Biology, The Hospital for Sick Children, Toronto, Ontario, Canada.,Department of Molecular Genetics and McLaughlin Centre, University of Toronto, Toronto, Ontario, Canada
| |
Collapse
|
7
|
Hu X, Chen X, Wu B, Soler IM, Chen S, Shen Y. Further defining the critical genes for the 4q21 microdeletion disorder. Am J Med Genet A 2016; 173:120-125. [PMID: 27604828 DOI: 10.1002/ajmg.a.37965] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Accepted: 08/22/2016] [Indexed: 11/09/2022]
Abstract
4q21 microdeletion syndrome (MIM: 613509) is a new genomic disorder characterized by intellectual disability, absent or severely delayed speech, growth retardation, hypotonia, variable brain malformation, and facial dysmorphism. The critical genes had been proposed based on an overlapping 1.37 Mb genomic region. No further refinement has been done since year 2010. Here, we present three cases with 4q21 deletion identified by clinical chromosomal microarray analysis. One of the cases have a de novo 761 kb deletion which is the smallest deletion ever reported at this locus. It provides an opportunity to further define the critical regions/genes associated with specific features of the 4q21 microdeletion syndrome. The evidence support the notion that PRKG2 and RASGEF1B are critical genes for intellectual disability and speech defect, and the heterogeneous nuclear ribonucleoprotein HNRNPD and HNRNPDL (previously known as HNRPDL) genes are associated with growth retardation and hypotonia. © 2016 Wiley Periodicals, Inc.
Collapse
Affiliation(s)
- Xuyun Hu
- Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, P.R. China.,Genetic and Metabolic Central Laboratory, Guangxi Maternal and Child Health Hospital, Nanning, Guangxi, P.R. China
| | - Xiaoli Chen
- Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, P.R. China
| | - Bingbing Wu
- Molecular Genetic Diagnosis Center, Shanghai Key Lab of Birth Defects, Pediatrics Research Institute, Children's Hospital of Fudan University, Shanghai, P.R. China
| | | | - Shaoke Chen
- Genetic and Metabolic Central Laboratory, Guangxi Maternal and Child Health Hospital, Nanning, Guangxi, P.R. China
| | - Yiping Shen
- Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, P.R. China.,Genetic and Metabolic Central Laboratory, Guangxi Maternal and Child Health Hospital, Nanning, Guangxi, P.R. China.,Departments of Laboratory Medicine and Pathology, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts
| |
Collapse
|
8
|
Lebedev IN, Nazarenko LP, Skryabin NA, Babushkina NP, Kashevarova AA. A de novo microtriplication at 4q21.21-q21.22 in a patient with a vascular malignant hemangioma, elongated sigmoid colon, developmental delay, and absence of speech. Am J Med Genet A 2016; 170:2089-96. [DOI: 10.1002/ajmg.a.37754] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Accepted: 05/02/2016] [Indexed: 12/28/2022]
Affiliation(s)
- Igor N. Lebedev
- Institute of Medical Genetics; Tomsk Russia
- National Research Tomsk State University; Tomsk Russia
- Siberian State Medical University; Tomsk Russia
| | - Lyudmila P. Nazarenko
- Institute of Medical Genetics; Tomsk Russia
- Siberian State Medical University; Tomsk Russia
| | - Nikolay A. Skryabin
- Institute of Medical Genetics; Tomsk Russia
- National Research Tomsk State University; Tomsk Russia
| | | | - Anna A. Kashevarova
- Institute of Medical Genetics; Tomsk Russia
- National Research Tomsk State University; Tomsk Russia
| |
Collapse
|
9
|
Abstract
Developmental delay occurs in 1-3% of the population, with unknown etiology in approximately 50% of cases. Initial genetic work up for developmental delay previously included chromosome analysis and subtelomeric FISH (fluorescent in situ hybridization). Array Comparative Genomic Hybridization (aCGH) has emerged as a tool to detect genetic copy number changes and uniparental disomy and is the most sensitive test in providing etiological diagnosis in developmental delay. aCGH allows for the provision of prognosis and recurrence risks, improves access to resources, helps limit further investigations and may alter medical management in many cases. aCGH has led to the delineation of novel genetic syndromes associated with developmental delay. An illustrative case of a 31-year-old man with long standing global developmental delay and recently diagnosed 4q21 deletion syndrome with a deletion of 20.8 Mb genomic interval is provided. aCGH is now recommended as a first line test in children and adults with undiagnosed developmental delay and congenital anomalies. Puce d'hybridation génomique comparative et retard de développement : un outil diagnostic pour les neurologues. Le retard de développement survient chez 1 à 3% de la population et son étiologie est inconnue chez à peu près 50% des cas. L'évaluation génétique initiale pour un retard de développement incluait antérieurement une analyse chromosomique et une analyse par FISH (hybridation in situ en fluorescence) de régions subtélomériques. La puce d'hybridation génomique comparative (CGHa) est devenue un outil de détection des changements du nombre de copies géniques ainsi que de la disomie uniparentale et elle est le test le plus sensible pour fournir un diagnostic étiologique dans le retard de développement. Le CGHa permet d'offrir un pronostic et un risque de récurrence, améliore l'accès aux ressources, aide à limiter les évaluations et peut modifier le traitement médical dans bien des cas. Le CGHa a mené à la définition de nouveaux syndromes génétiques associés à un retard de développement. À titre d'exemple, nous décrivons le cas d'un homme âgé de 31 ans qui présentait un retard de développement global depuis longtemps et chez qui un syndrome associé à une délétion 4q21 a été diagnostiqué récemment, soit une délétion de 20,8 Mb. Le CGHa est maintenant recommandé comme test de première ligne chez les enfants et les adultes présentant un retard de développement et des anomalies congénitales.
Collapse
|
10
|
Fee A, Noble N, Valdovinos MG. Functional Analysis of Phenotypic Behaviors of a 5-Year-Old Male with Novel 4q21 Microdeletion. JOURNAL OF PEDIATRIC NEUROPSYCHOLOGY 2015. [DOI: 10.1007/s40817-015-0006-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
11
|
Yano S, McNamara M, Halbach S, Waggoner D. 4q21 microdeletion in a patient with epilepsy and brain malformations. Am J Med Genet A 2015; 167:1409-13. [DOI: 10.1002/ajmg.a.36910] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Accepted: 11/18/2014] [Indexed: 11/07/2022]
Affiliation(s)
- Sho Yano
- Section of Pediatric Neurology; Department of Pediatrics; University of Chicago Comer Children's Hospital; Chicago Illinios
- Department of Pediatrics; University of Chicago Comer Children's Hospital; Chicago Illinios
| | - Meredithe McNamara
- Department of Pediatrics; University of Chicago Comer Children's Hospital; Chicago Illinios
| | - Sara Halbach
- Department of Human Genetics; University of Chicago; Chicago Illinios
| | - Darrel Waggoner
- Department of Pediatrics; University of Chicago Comer Children's Hospital; Chicago Illinios
- Department of Human Genetics; University of Chicago; Chicago Illinios
| |
Collapse
|
12
|
Komlósi K, Duga B, Hadzsiev K, Czakó M, Kosztolányi G, Fogarasi A, Melegh B. Phenotypic variability in a Hungarian patient with the 4q21 microdeletion syndrome. Mol Cytogenet 2015; 8:16. [PMID: 25774221 PMCID: PMC4359765 DOI: 10.1186/s13039-015-0118-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2014] [Accepted: 02/13/2015] [Indexed: 01/16/2023] Open
Abstract
Background Interstitial deletions of 4q21 (MIM 613509) have already been reported in more than a dozen patients with deletions ranging from 2 to 15.1 Mb delineating a common phenotype including marked growth restriction, hypotonia, severe developmental delay with absent or delayed speech and distinctive facial features. A minimal critical region of 1.37 Mb accounting for the common features with 5 known genes (PRKG2, RASGEF1B, HNRNPD, HNRPDL, and ENOPH1) has been described so far. Results Here we report on a 5 year-old Hungarian girl presenting with severe developmental delay, good receptive language but absent spoken speech, short stature, dystrophy, hypotonia, distinctive facies including broad forehead, frontal bossing, downward slanting palpebral fissures, hypertelorism, hypoplastic ear-lobes, anteverted nostrils, short philtrum, small mouth, higharched palate, short, small hands and feet, distally narrowing fingers and clinodactyly. Cerebral MRI showed ventricular dilation and an increase in periventricular signal intensity. After extensive metabolic tests and exclusion of subtelomeric deletions array CGH analysis was performed using the Agilent Human Genome G3 SurePrint 8x60K Microarray (Agilent Technologies, USA), which detected a 4,85 Mb de novo interstitial deletion of 4q21.21-4q21.23. The clinical symptoms only partly overlap with reported 4q21 microdeletion cases. Among multiple annotated genes our patient is also haploinsufficient for the following genes: RASGEF1B being a strong candidate for the neurodevelopmental features and PRKG2 for severe growth delay. Conclusion The first Hungarian case of 4q21 deletion adds to the phenotypic spectrum of this novel microdeletion syndrome and underlines the importance of array CGH to uncover the heterogeneous causes of intellectual disability.
Collapse
Affiliation(s)
- Katalin Komlósi
- Department of Medical Genetics, Clinical Centre, University of Pecs, Szigeti Street 12, Pecs, H-7624 Hungary.,Szentágothai Research Centre, University of Pecs, Ifjusag Street 20, Pecs, H-7624 Hungary
| | - Balázs Duga
- Department of Medical Genetics, Clinical Centre, University of Pecs, Szigeti Street 12, Pecs, H-7624 Hungary.,Szentágothai Research Centre, University of Pecs, Ifjusag Street 20, Pecs, H-7624 Hungary
| | - Kinga Hadzsiev
- Department of Medical Genetics, Clinical Centre, University of Pecs, Szigeti Street 12, Pecs, H-7624 Hungary.,Szentágothai Research Centre, University of Pecs, Ifjusag Street 20, Pecs, H-7624 Hungary
| | - Márta Czakó
- Department of Medical Genetics, Clinical Centre, University of Pecs, Szigeti Street 12, Pecs, H-7624 Hungary.,Szentágothai Research Centre, University of Pecs, Ifjusag Street 20, Pecs, H-7624 Hungary
| | - György Kosztolányi
- Department of Medical Genetics, Clinical Centre, University of Pecs, Szigeti Street 12, Pecs, H-7624 Hungary.,Szentágothai Research Centre, University of Pecs, Ifjusag Street 20, Pecs, H-7624 Hungary
| | - András Fogarasi
- Department of Neurology, Bethesda Children's Hospital, Bethesda Street 3, Budapest, H-1146 Hungary
| | - Béla Melegh
- Department of Medical Genetics, Clinical Centre, University of Pecs, Szigeti Street 12, Pecs, H-7624 Hungary.,Szentágothai Research Centre, University of Pecs, Ifjusag Street 20, Pecs, H-7624 Hungary
| |
Collapse
|
13
|
Bhoj E, Halbach S, McDonald-McGinn D, Tan C, Lande R, Waggoner D, Zackai E. Expanding the spectrum of microdeletion 4q21 syndrome: A partial phenotype with incomplete deletion of the minimal critical region and a new association with cleft palate and pierre robin sequence. Am J Med Genet A 2013; 161A:2327-33. [DOI: 10.1002/ajmg.a.36061] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Revised: 07/03/2012] [Accepted: 04/25/2013] [Indexed: 11/05/2022]
Affiliation(s)
- Elizabeth Bhoj
- Division of Genetics; The Children's Hospital of Philadelphia; Philadelphia Pennsylvania
| | - Sara Halbach
- Department of Human Genetics; University of Chicago; Chicago Illinois
| | - Donna McDonald-McGinn
- Division of Genetics; The Children's Hospital of Philadelphia; Philadelphia Pennsylvania
| | - Christopher Tan
- Department of Human Genetics; University of Chicago; Chicago Illinois
| | - Rachel Lande
- Division of Genetics; The Children's Hospital of Philadelphia; Philadelphia Pennsylvania
| | - Darrel Waggoner
- Department of Human Genetics; University of Chicago; Chicago Illinois
| | - Elaine Zackai
- Division of Genetics; The Children's Hospital of Philadelphia; Philadelphia Pennsylvania
| |
Collapse
|