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Bertucci E, Giulini S, Sighinolfi G, Benuzzi M, Lugli L. Prenatal ultrasound signs of Aarskog-Scott syndrome in a twin pregnancy: A case report. Int J Gynaecol Obstet 2024; 165:837-839. [PMID: 38217107 DOI: 10.1002/ijgo.15351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2023] [Revised: 12/05/2023] [Accepted: 12/18/2023] [Indexed: 01/15/2024]
Abstract
SynopsisWe describe the case of Aarskog‐Scott syndrome in a twin pregnancy with the prenatal finding of shortened fetal long bones.
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Affiliation(s)
- Emma Bertucci
- Obstetrics and Gynecology Unit, Department of Medical and Surgical Sciences for Mothers, Children and Adults, University of Modena and Reggio Emilia, Azienda Ospedaliero-Universitaria Policlinico, Modena, Italy
| | - Simone Giulini
- Obstetrics and Gynecology Unit, Department of Medical and Surgical Sciences for Mothers, Children and Adults, University of Modena and Reggio Emilia, Azienda Ospedaliero-Universitaria Policlinico, Modena, Italy
| | - Giovanna Sighinolfi
- Obstetrics and Gynecology Unit, Department of Medical and Surgical Sciences for Mothers, Children and Adults, University of Modena and Reggio Emilia, Azienda Ospedaliero-Universitaria Policlinico, Modena, Italy
| | - Martina Benuzzi
- Obstetrics and Gynecology Unit, Department of Medical and Surgical Sciences for Mothers, Children and Adults, University of Modena and Reggio Emilia, Azienda Ospedaliero-Universitaria Policlinico, Modena, Italy
| | - Licia Lugli
- Neonatal Intensive Care Unit, Women's and Children's Health Department, University Hospital of Modena, Modena, Italy
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Powis G, Meuillet EJ, Indarte M, Booher G, Kirkpatrick L. Pleckstrin Homology [PH] domain, structure, mechanism, and contribution to human disease. Biomed Pharmacother 2023; 165:115024. [PMID: 37399719 DOI: 10.1016/j.biopha.2023.115024] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Accepted: 06/14/2023] [Indexed: 07/05/2023] Open
Abstract
The pleckstrin homology [PH] domain is a structural fold found in more than 250 proteins making it the 11th most common domain in the human proteome. 25% of family members have more than one PH domain and some PH domains are split by one, or several other, protein domains although still folding to give functioning PH domains. We review mechanisms of PH domain activity, the role PH domain mutation plays in human disease including cancer, hyperproliferation, neurodegeneration, inflammation, and infection, and discuss pharmacotherapeutic approaches to regulate PH domain activity for the treatment of human disease. Almost half PH domain family members bind phosphatidylinositols [PIs] that attach the host protein to cell membranes where they interact with other membrane proteins to give signaling complexes or cytoskeleton scaffold platforms. A PH domain in its native state may fold over other protein domains thereby preventing substrate access to a catalytic site or binding with other proteins. The resulting autoinhibition can be released by PI binding to the PH domain, or by protein phosphorylation thus providing fine tuning of the cellular control of PH domain protein activity. For many years the PH domain was thought to be undruggable until high-resolution structures of human PH domains allowed structure-based design of novel inhibitors that selectively bind the PH domain. Allosteric inhibitors of the Akt1 PH domain have already been tested in cancer patients and for proteus syndrome, with several other PH domain inhibitors in preclinical development for treatment of other human diseases.
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Affiliation(s)
- Garth Powis
- PHusis Therapeutics Inc., 6019 Folsom Drive, La Jolla, CA 92037, USA.
| | | | - Martin Indarte
- PHusis Therapeutics Inc., 6019 Folsom Drive, La Jolla, CA 92037, USA
| | - Garrett Booher
- PHusis Therapeutics Inc., 6019 Folsom Drive, La Jolla, CA 92037, USA
| | - Lynn Kirkpatrick
- PHusis Therapeutics Inc., 6019 Folsom Drive, La Jolla, CA 92037, USA
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3
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Liang Y, Wu H, He X, He X. Case Report: Aarskog-scott syndrome caused by FGD1 gene variation: A family study. Front Genet 2022; 13:932073. [PMID: 36051692 PMCID: PMC9424661 DOI: 10.3389/fgene.2022.932073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Accepted: 07/07/2022] [Indexed: 11/13/2022] Open
Abstract
Aarskog-Scott syndrome is a rare genetic disorder characterized by short stature, abnormal facial features, and digital and genital deformities. FGD1 gene variation is the known cause of this disorder. This paper described a Chinese family study of Aarskog-Scott syndrome in which the main patients were two brothers. Then, the relationship between genotype and phenotype in Aarskog-Scott syndrome was investigated preliminarily. A new FGD1 gene variant was revealed in this study, providing insights into the link between phenotype and genotype variations in Aarskog-Scott syndrome as well as a foundation for its diagnosis and treatment.
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Affiliation(s)
- Yijia Liang
- Fifth Medical Center of Chinese PLA General Hospital, Beijing, China
- Chinese PLA Medical College, Beijing, China
| | - Honglin Wu
- Fifth Medical Center of Chinese PLA General Hospital, Beijing, China
| | - Xiumei He
- Fifth Medical Center of Chinese PLA General Hospital, Beijing, China
| | - Xiyu He
- Fifth Medical Center of Chinese PLA General Hospital, Beijing, China
- *Correspondence: Xiyu He,
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Zhu Y, Chen Q, Lin H, Lu H, Qu Y, Yan Q, Wang C. FGD1 Variant Associated With Aarskog-Scott Syndrome. Front Pediatr 2022; 10:888923. [PMID: 35911831 PMCID: PMC9329920 DOI: 10.3389/fped.2022.888923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Accepted: 05/31/2022] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND Aarskog-Scott syndrome, a rare X-linked genetic disorder, is identified by combined clinical manifestations of short stature, facial, skeletal, and genital anomalies. Annually, two or three new cases are diagnosed with Aarskog-Scott syndrome, which is associated with FGD1 variants. However, there is no specific treatment for Aarskog-Scott syndrome due to its unclear mechanism. METHODS Clinical data were collected when the patient first visited the hospital. Trio whole-exome sequencing and Sanger sequencing were performed for the genetic cause of disease. To evaluate the pathogenicity of the variants in vitro, stable cell lines were constructed using lentivirus infection in 143B cell. Furthermore, Western blot was used to verify the expression of signaling pathway-related proteins, and the transcription levels of osteogenic-related genes were verified by luciferase reporter gene assay. RESULTS A 7-year-old boy was manifested with facial abnormalities, intellectual disability, and short stature (-3.98 SDS) while the growth hormone level of stimulation test was normal. Trio whole-exome sequencing and Sanger sequencing identified a variant (c.1270A>G, p.Asn424Asp) in FGD1 gene. The Asn424 residue was highly conserved and the hydrogen bond in the FGD1 variant protein has changed, which led to decrease in the interaction with CDC42 protein. In vitro study showed that the Asn424Asp variant significantly decreased the transcription levels of OCN, COL1A1, and ALP activity, and it activated the phosphorylation of JNK1. CONCLUSION Molecular biological mechanisms between abnormal expression of FGD1and Aarskog-Scott syndrome remain poorly understood. In our study, c.1270A>G variant of FGD1 resulted in Aarskog-Scott syndrome, and the analysis of pathogenicity supports the deleterious effect of the variant. Furthermore, we demonstrated the weakened affinity of the mutant FGD1 and CDC42. Decreased expression of osteogenic-related gene and abnormal activation of JNK1 were also shown in this work.
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Affiliation(s)
- Yilin Zhu
- Department of Pediatrics, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Qingqing Chen
- Department of Pediatrics, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Haiyan Lin
- Department of Pediatrics, The First People's Hospital of Wenling, Taizhou, China
| | - Huifei Lu
- Department of Pediatrics, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Yangbin Qu
- Department of Pediatrics, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Qingfeng Yan
- Department of Pediatrics, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China.,College of Life Sciences, Zhejiang University, Hangzhou, China.,Key Laboratory for Cell and Gene Engineering of Zhejiang Province, Hangzhou, China
| | - Chunlin Wang
- Department of Pediatrics, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
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Jabalameli MR, Briceno I, Martinez J, Briceno I, Pengelly RJ, Ennis S, Collins A. Aarskog-Scott syndrome: phenotypic and genetic heterogeneity. AIMS GENETICS 2021. [DOI: 10.3934/genet.2016.1.49] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
AbstractAarskog-Scott syndrome (AAS) is a rare developmental disorder which primarily affects males and has a relative prevalence of 1 in 25,000 in the general population. AAS patients usually present with developmental complications including short stature and facial, skeletal and urogenital anomalies. The spectrum of genotype-phenotype correlations in AAS is unclear and mutations of the FGD1 gene on the proximal short arm of chromosome X account for only 20% of the incidence of the disorder. Failure to identify pathogenic variants in patients referred for FGD1 screening suggests heterogeneity underlying pathophysiology of the condition. Furthermore, overlapping features of AAS with several other developmental disorders increase the complexity of diagnosis. Cytoskeletal signaling may be involved in the pathophysiology of AAS. The FGD1 protein family has a role in activation of CDC42 (Cell Division Control protein 42 homolog) which has a core function in remodeling of extracellular matrix and the transcriptional activation of many modulators of development. Therefore, mutations in components in the EGFR1 (Epidermal Growth Factor Receptor 1) signaling pathway, to which CDC42 belongs, may contribute to pathophysiology. Parallel sequencing strategies (so-called next generation sequencing or high throughput sequencing) enables simultaneous production of millions of sequencing reads that enormously facilitate cost-effective identification of cryptic mutations in heterogeneous monogenic disorders. Here we review the source of phenotypic and genetic heterogeneity in the context of AAS and discuss the applicability of next generation sequencing for identification of novel mutations underlying AAS.
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Affiliation(s)
- M. Reza Jabalameli
- Genetic Epidemiology & Genomic Informatics, Faculty of Medicine, University of Southampton, Southampton, UK
| | - Ignacio Briceno
- Department of Biomedical Sciences, Medical School, Universidad de La Sabana, Bogota, Colombia
| | - Julio Martinez
- Department of Biomedical Sciences, Medical School, Universidad de La Sabana, Bogota, Colombia
| | - Ignacio Briceno
- Instituto de Genética Humana, Faculty of Medicine, Pontificia Universidad Javeriana, Colombia
| | - Reuben J. Pengelly
- Genetic Epidemiology & Genomic Informatics, Faculty of Medicine, University of Southampton, Southampton, UK
| | - Sarah Ennis
- Genetic Epidemiology & Genomic Informatics, Faculty of Medicine, University of Southampton, Southampton, UK
| | - Andrew Collins
- Genetic Epidemiology & Genomic Informatics, Faculty of Medicine, University of Southampton, Southampton, UK
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The Prevalence of Clinical Features in Patients with Aarskog-Scott Syndrome and Assessment of Genotype-Phenotype Correlation: A Systematic Review. Genet Res (Camb) 2021; 2021:6652957. [PMID: 33762894 PMCID: PMC7953535 DOI: 10.1155/2021/6652957] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Accepted: 11/30/2020] [Indexed: 12/28/2022] Open
Abstract
Aarskog–Scott syndrome is a genetically and clinically heterogeneous rare condition caused by a pathogenic variant in the FGD1 gene. A systematic review was carried out to analyse the prevalence of clinical manifestations found in patients, as well as to evaluate the genotype-phenotype correlation. The results obtained show that clinical findings of the craniofacial, orthopaedic, and genitourinary tract correspond to the highest scores of prevalence. The authors reclassified the primary, secondary, and additional criteria based on their prevalence. Furthermore, it was possible to observe, in accordance with previous reports, that the reported phenotypes do not present a direct relation to the underlying genotypes.
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Ge Y, Li N, Wang Z, Wang J, Cai H. Novel variant in the FGD1 gene causing Aarskog-Scott syndrome. Exp Ther Med 2017; 13:2623-2628. [PMID: 28587322 PMCID: PMC5450764 DOI: 10.3892/etm.2017.4301] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2015] [Accepted: 10/11/2016] [Indexed: 11/05/2022] Open
Abstract
Aarskog-Scott syndrome (ASS) is a rare, X-linked recessive inherited disorder. Affected individuals may develop short stature and exhibit distinctive skeletal and genital development. Mutations in the FYVE, rhogef and pleckstrin homology domain-containing protein 1 (FGD1) gene, located within the Xp11.21 region, are responsible for the occurrence of ASS. Since it is rare and complex, it can take a long time to obtain a definitive clinical diagnosis unless clinicians are familiar with the disease. In the present study, whole-exome sequencing (WES) was performed to screen for causal variants in a Chinese pediatric patient who exhibited a number of clinical symptoms of ASS, including short stature, facial abnormalities, stubby metacarpals and swollen testis. DNA sequencing revealed a novel c.1270 A>G mutation in exon 6 of the FGD1 gene, which led to an amino acid conversion of asparagine to aspartic acid on codon 424 and in silico analysis indicated that this novel missense mutation was pathogenic. The present study identified a novel variant of the FGD1 gene and to the best of our knowledge, is the first report of ASS in a Chinese individual. The results indicated that WES is an effective tool for the diagnosis of rare and complex syndromes such as ASS.
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Affiliation(s)
- Yihua Ge
- Department of Pediatric Orthopedics, Shanghai Children's Medical Center, Shanghai Jiaotong University School of Medicine, Shanghai 200127, P.R. China
| | - Niu Li
- Institute of Pediatric Translational Medicine, Shanghai Children's Medical Center, Shanghai Jiaotong University School of Medicine, Shanghai 200127, P.R. China
| | - Zhigang Wang
- Department of Pediatric Orthopedics, Shanghai Children's Medical Center, Shanghai Jiaotong University School of Medicine, Shanghai 200127, P.R. China
| | - Jian Wang
- Institute of Pediatric Translational Medicine, Shanghai Children's Medical Center, Shanghai Jiaotong University School of Medicine, Shanghai 200127, P.R. China
| | - Haiqing Cai
- Department of Pediatric Orthopedics, Shanghai Children's Medical Center, Shanghai Jiaotong University School of Medicine, Shanghai 200127, P.R. China
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Hamzeh AR, Saif F, Nair P, Binjab AJ, Mohamed M, Al-Ali MT, Bastaki F. A novel, putatively null, FGD1 variant leading to Aarskog-Scott syndrome in a family from UAE. BMC Pediatr 2017; 17:31. [PMID: 28103835 PMCID: PMC5248450 DOI: 10.1186/s12887-017-0781-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Accepted: 01/03/2017] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The X-linked condition "Aarskog-Scott syndrome (AAS)" causes a characteristic combination of short stature, facial, genital and skeletal anomalies. Studies elucidated a causative link between AAS and mutations in the FGD1 gene, which encodes a Rho/Rac guanine exchange factor. FGD1 is involved in regulating signaling pathways that control cytoskeleton organization and embryogenesis. CASE PRESENTATION FGD1 was studied in an Emirati family with two cases of AAS using PCR amplification and direct sequencing of the entire coding region of the gene. Various in silico tools were also used to predict the functional consequences of FGD1 mutations. In the reported family, two brothers harbor a novel hemizygous mutation in FGD1 c.53del (p.Pro18Argfs*106) for which the mother is heterozygous. This frameshift deletion, being close to N-terminus of FGD1, is predicted to shift the reading frame in a way that it translates to 105 erroneous amino acids followed by a premature stop codon at position 106. Full molecular and clinical accounts about the variant are given so as to expand molecular and phenotypical knowledge about this disorder. CONCLUSIONS A novel variant in FGD1 was found in an Emirati family with two brothers suffering from AAS. The variant is predicted to be a null mutation, and this is the first report of its kind from the United Arab Emirates.
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Affiliation(s)
- Abdul Rezzak Hamzeh
- Centre for Arab Genomic Studies, P.O. Box 22252, Dubai, United Arab Emirates.
| | - Fatima Saif
- Pediatric Department, Latifa Hospital, Dubai Health Authority, Dubai, United Arab Emirates
| | - Pratibha Nair
- Centre for Arab Genomic Studies, P.O. Box 22252, Dubai, United Arab Emirates
| | - Asma Jassim Binjab
- Pediatrics and Neonatology Department, Dubai Hospital, Dubai Health Authority, Dubai, United Arab Emirates
| | - Madiha Mohamed
- Pediatric Department, Latifa Hospital, Dubai Health Authority, Dubai, United Arab Emirates
| | | | - Fatma Bastaki
- Pediatric Department, Latifa Hospital, Dubai Health Authority, Dubai, United Arab Emirates
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Griffin LB, Farley FA, Antonellis A, Keegan CE. A novel FGD1 mutation in a family with Aarskog-Scott syndrome and predominant features of congenital joint contractures. Cold Spring Harb Mol Case Stud 2016; 2:a000943. [PMID: 27551683 PMCID: PMC4990810 DOI: 10.1101/mcs.a000943] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2016] [Accepted: 04/10/2016] [Indexed: 11/25/2022] Open
Abstract
Mutations in FGD1 cause Aarskog-Scott syndrome (AAS), an X-linked condition characterized by abnormal facial, skeletal, and genital development due to abnormal embryonic morphogenesis and skeletal formation. Here we report a novel FGD1 mutation in a family with atypical features of AAS, specifically bilateral upper and lower limb congenital joint contractures and cardiac abnormalities. The male proband and his affected maternal uncle are hemizygous for the novel FGD1 mutation p.Arg921X. This variant is the most carboxy-terminal FGD1 mutation identified in a family with AAS and is predicted to truncate the FGD1 protein at the second to last amino acid of the carboxy-terminal pleckstrin homology (PH) domain. Our study emphasizes the importance of the 3' peptide sequence in the structure and/or function of the FGD1 protein and further demonstrates the need to screen patients with X-linked congenital joint contractures for FGD1 mutations.
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Affiliation(s)
- Laurie Beth Griffin
- Program in Cellular and Molecular Biology, University of Michigan Medical School, Ann Arbor, Michigan 48109, USA;; Medical Scientist Training Program, University of Michigan Medical School, Ann Arbor, Michigan 48109, USA
| | - Frances A Farley
- Department of Orthopaedic Surgery, University of Michigan Medical School, Ann Arbor, Michigan 48109, USA
| | - Anthony Antonellis
- Program in Cellular and Molecular Biology, University of Michigan Medical School, Ann Arbor, Michigan 48109, USA;; Department of Human Genetics, University of Michigan Medical School, Ann Arbor, Michigan 48109, USA;; Department of Neurology, University of Michigan Medical School, Ann Arbor, Michigan 48109, USA
| | - Catherine E Keegan
- Department of Human Genetics, University of Michigan Medical School, Ann Arbor, Michigan 48109, USA;; Department of Pediatrics, University of Michigan Medical School, Ann Arbor, Michigan 48109, USA
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Fujikura K. Data on single-step purification method for dye-labeled DNA sequencing. Data Brief 2016; 7:873-6. [PMID: 27077088 PMCID: PMC4816862 DOI: 10.1016/j.dib.2016.02.050] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2015] [Revised: 02/01/2016] [Accepted: 02/19/2016] [Indexed: 11/28/2022] Open
Abstract
Dye-labelled DNA sequencing is one of the most common and robust technique required for molecular biology since 1977 (Sanger, 1977) [1]. I have recently provided the single-step purification method for dye-labeled sequencing products, which is based on the removal of the washing step in EDTA/ethanol precipitation (Fujikura, 2015) [2]. Here I assess and report the accumulated data of the modified method on the larger scale in practice.
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