1
|
Li XY, Wang Z, Yang Y, Lin R, Wang C. Domain-specific phenotypes in LINS1-related disorder-A Chinese family with the Q92X variant and literature review. AMERICAN JOURNAL OF MEDICAL GENETICS. PART C, SEMINARS IN MEDICAL GENETICS 2024:e32085. [PMID: 38563234 DOI: 10.1002/ajmg.c.32085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 03/12/2024] [Accepted: 03/20/2024] [Indexed: 04/04/2024]
Abstract
LINS1 is the human homolog of the Drosophila segment polarity gene that encodes an essential regulator of the wingless/Wnt signaling. By 2011, only seven pedigrees (16 patients) with eight causative variants in LINS1 gene have been reported. These cases mainly presented with infancy-/child-onset neurodevelopmental disorders, facial dysmorphia, and other clinical features, and a wide spectrum of clinically distinct phenotypes were also manifested. In our study, two brothers in a family were admitted and diagnosed with child-onset movement disorders, slight intellectual disability, psychological symptoms, eye problems, urinary and bowel dysfunction, mitral value prolapse, and Q-T prolongation. By exome sequencing, we identified a nonsense homozygous pathogenic variant (LINS1: c.274C > T (p.Q92X)), which had been reported in a case diagnosed with intellectual disability and psychiatric disorders (such as schizophrenia and anxiety). Compared with this case, the clinical features of our cases were distinct. In particular, our cases displayed unusual features of heart and blood system. Furthermore, the genotype-phenotype relationship analysis suggested that distinct phenotypes presented in cases carrying variants in different domains of the LINS1 gene. In conclusions, our findings suggest the high clinical variations in the LINS1 variants-related disorders. Moreover, the Q92X might be a recurrent variant in Hans of Southern China.
Collapse
Affiliation(s)
- Xu-Ying Li
- Department of Neurology and Neurobiology, Xuanwu Hospital of Capital Medical University, National Clinical Research Center for Geriatric Diseases, Beijing, China
| | - Zhanjun Wang
- Department of Neurology and Neurobiology, Xuanwu Hospital of Capital Medical University, National Clinical Research Center for Geriatric Diseases, Beijing, China
| | - Yanping Yang
- Department of Neurology, Shuozhou People's Hospital, Shanxi, China
| | - Ruichai Lin
- Shenzhen Clabee Biotechnology Incorporation, Shenzhen, China
| | - Chaodong Wang
- Department of Neurology and Neurobiology, Xuanwu Hospital of Capital Medical University, National Clinical Research Center for Geriatric Diseases, Beijing, China
| |
Collapse
|
2
|
Neuhofer CM, Catarino CB, Schmidt H, Seelos K, Alhaddad B, Haack TB, Klopstock T. LINS1-associated neurodevelopmental disorder: Family with novel mutation expands the phenotypic spectrum. NEUROLOGY-GENETICS 2020; 6:e500. [PMID: 32802957 PMCID: PMC7413627 DOI: 10.1212/nxg.0000000000000500] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Accepted: 06/29/2020] [Indexed: 11/18/2022]
Abstract
Objective Clinical, neuroimaging, and genetic characterization of 3 patients with LINS1-associated developmental regression, intellectual disability, dysmorphism, and further neurologic deficits. Methods Three affected brothers from a consanguineous family from Afghanistan, their 2 healthy siblings, and both parents were all assessed in the clinic. General and neurologic examination, expert dysmorphology examination, and 3T brain MRI were performed. Whole-exome sequencing was performed for the 3 affected brothers, followed by Sanger sequencing in all available family members. Results The index patient and his 2 affected brothers presented a complex neurologic syndrome with similar features but marked intrafamilial phenotypical variability, including varying degrees of cognitive impairment, speech impairment, dystonia, abnormal eye movements, and dysmorphic features. All 3 affected brothers are homozygous for a novel, pathogenic frameshift mutation in LINS1, c.1672_1679del, and p.Gly558Profs*22, whereas both parents and healthy siblings are heterozygous for the mutation. No major brain malformations were evident in 3T brain MRI of the affected brothers. Conclusion This consanguineous family with a novel mutation expands the spectrum of LINS1-associated disorder to include developmental regression, oculomotor signs, and dystonia, previously not described in the published 9 cases of this rare disorder. The 3T-MRI data from our 3 patients and review of the neuroimaging data in the literature showed unspecific brain MRI changes. LINS1 protein is a known modulating factor of the Wnt signaling pathway, with important roles in organogenesis including of the cerebral cortex. More research is warranted to disentangle the underlying pathophysiologic mechanisms, leading to cognitive impairment and the complex phenotype of LINS1-associated disorder.
Collapse
Affiliation(s)
- Christiane M Neuhofer
- Friedrich-Baur-Institute (C.M.N., C.B.C., T.K.), Department of Neurology, University Hospital, LMU Munich, Germany; Institute of Human Genetics (C.M.N.), University Medical Center Göttingen, Germany; Department of Pediatrics (H.S.), Medical Genetics, Dr. von Haunersches Kinderspital, University Hospital, LMU Munich, Germany; Department of Neuroradiology (K.S.), University Hospital, LMU Munich, Germany; Institute of Human Genetics (B.A., T.B.H.), Technical University Munich, Germany; Institute of Human Genetics (B.A., T.B.H.), Helmholtz Zentrum München, Neuherberg, Germany; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Munich, Germany; and Munich Cluster for Systems Neurology (SyNergy) (T.K.), Munich, Germany
| | - Claudia B Catarino
- Friedrich-Baur-Institute (C.M.N., C.B.C., T.K.), Department of Neurology, University Hospital, LMU Munich, Germany; Institute of Human Genetics (C.M.N.), University Medical Center Göttingen, Germany; Department of Pediatrics (H.S.), Medical Genetics, Dr. von Haunersches Kinderspital, University Hospital, LMU Munich, Germany; Department of Neuroradiology (K.S.), University Hospital, LMU Munich, Germany; Institute of Human Genetics (B.A., T.B.H.), Technical University Munich, Germany; Institute of Human Genetics (B.A., T.B.H.), Helmholtz Zentrum München, Neuherberg, Germany; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Munich, Germany; and Munich Cluster for Systems Neurology (SyNergy) (T.K.), Munich, Germany
| | - Heinrich Schmidt
- Friedrich-Baur-Institute (C.M.N., C.B.C., T.K.), Department of Neurology, University Hospital, LMU Munich, Germany; Institute of Human Genetics (C.M.N.), University Medical Center Göttingen, Germany; Department of Pediatrics (H.S.), Medical Genetics, Dr. von Haunersches Kinderspital, University Hospital, LMU Munich, Germany; Department of Neuroradiology (K.S.), University Hospital, LMU Munich, Germany; Institute of Human Genetics (B.A., T.B.H.), Technical University Munich, Germany; Institute of Human Genetics (B.A., T.B.H.), Helmholtz Zentrum München, Neuherberg, Germany; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Munich, Germany; and Munich Cluster for Systems Neurology (SyNergy) (T.K.), Munich, Germany
| | - Klaus Seelos
- Friedrich-Baur-Institute (C.M.N., C.B.C., T.K.), Department of Neurology, University Hospital, LMU Munich, Germany; Institute of Human Genetics (C.M.N.), University Medical Center Göttingen, Germany; Department of Pediatrics (H.S.), Medical Genetics, Dr. von Haunersches Kinderspital, University Hospital, LMU Munich, Germany; Department of Neuroradiology (K.S.), University Hospital, LMU Munich, Germany; Institute of Human Genetics (B.A., T.B.H.), Technical University Munich, Germany; Institute of Human Genetics (B.A., T.B.H.), Helmholtz Zentrum München, Neuherberg, Germany; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Munich, Germany; and Munich Cluster for Systems Neurology (SyNergy) (T.K.), Munich, Germany
| | - Bader Alhaddad
- Friedrich-Baur-Institute (C.M.N., C.B.C., T.K.), Department of Neurology, University Hospital, LMU Munich, Germany; Institute of Human Genetics (C.M.N.), University Medical Center Göttingen, Germany; Department of Pediatrics (H.S.), Medical Genetics, Dr. von Haunersches Kinderspital, University Hospital, LMU Munich, Germany; Department of Neuroradiology (K.S.), University Hospital, LMU Munich, Germany; Institute of Human Genetics (B.A., T.B.H.), Technical University Munich, Germany; Institute of Human Genetics (B.A., T.B.H.), Helmholtz Zentrum München, Neuherberg, Germany; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Munich, Germany; and Munich Cluster for Systems Neurology (SyNergy) (T.K.), Munich, Germany
| | - Tobias B Haack
- Friedrich-Baur-Institute (C.M.N., C.B.C., T.K.), Department of Neurology, University Hospital, LMU Munich, Germany; Institute of Human Genetics (C.M.N.), University Medical Center Göttingen, Germany; Department of Pediatrics (H.S.), Medical Genetics, Dr. von Haunersches Kinderspital, University Hospital, LMU Munich, Germany; Department of Neuroradiology (K.S.), University Hospital, LMU Munich, Germany; Institute of Human Genetics (B.A., T.B.H.), Technical University Munich, Germany; Institute of Human Genetics (B.A., T.B.H.), Helmholtz Zentrum München, Neuherberg, Germany; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Munich, Germany; and Munich Cluster for Systems Neurology (SyNergy) (T.K.), Munich, Germany
| | - Thomas Klopstock
- Friedrich-Baur-Institute (C.M.N., C.B.C., T.K.), Department of Neurology, University Hospital, LMU Munich, Germany; Institute of Human Genetics (C.M.N.), University Medical Center Göttingen, Germany; Department of Pediatrics (H.S.), Medical Genetics, Dr. von Haunersches Kinderspital, University Hospital, LMU Munich, Germany; Department of Neuroradiology (K.S.), University Hospital, LMU Munich, Germany; Institute of Human Genetics (B.A., T.B.H.), Technical University Munich, Germany; Institute of Human Genetics (B.A., T.B.H.), Helmholtz Zentrum München, Neuherberg, Germany; German Center for Neurodegenerative Diseases (DZNE) (T.K.), Munich, Germany; and Munich Cluster for Systems Neurology (SyNergy) (T.K.), Munich, Germany
| |
Collapse
|