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Karasozen Y, Osbun JW, Parada CA, Busald T, Tatman P, Gonzalez-Cuyar LF, Hale CJ, Alcantara D, O'Driscoll M, Dobyns WB, Murray M, Kim LJ, Byers P, Dorschner MO, Ferreira M. Somatic PDGFRB Activating Variants in Fusiform Cerebral Aneurysms. Am J Hum Genet 2019; 104:968-976. [PMID: 31031011 PMCID: PMC6506794 DOI: 10.1016/j.ajhg.2019.03.014] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Accepted: 03/15/2019] [Indexed: 12/20/2022] Open
Abstract
The role of somatic genetic variants in the pathogenesis of intracranial-aneurysm formation is unknown. We identified a 23-year-old man with progressive, right-sided intracranial aneurysms, ipsilateral to an impressive cutaneous phenotype. The index individual underwent a series of genetic evaluations for known connective-tissue disorders, but the evaluations were unrevealing. Paired-sample exome sequencing between blood and fibroblasts derived from the diseased areas detected a single novel variant predicted to cause a p.Tyr562Cys (g.149505130T>C [GRCh37/hg19]; c.1685A>G) change within the platelet-derived growth factor receptor β gene (PDGFRB), a juxtamembrane-coding region. Variant-allele fractions ranged from 18.75% to 53.33% within histologically abnormal tissue, suggesting post-zygotic or somatic mosaicism. In an independent cohort of aneurysm specimens, we detected somatic-activating PDGFRB variants in the juxtamembrane domain or the kinase activation loop in 4/6 fusiform aneurysms (and 0/38 saccular aneurysms; Fisher's exact test, p < 0.001). PDGFRB-variant, but not wild-type, patient cells were found to have overactive auto-phosphorylation with downstream activation of ERK, SRC, and AKT. The expression of discovered variants demonstrated non-ligand-dependent auto-phosphorylation, responsive to the kinase inhibitor sunitinib. Somatic gain-of-function variants in PDGFRB are a novel mechanism in the pathophysiology of fusiform cerebral aneurysms and suggest a potential role for targeted therapy with kinase inhibitors.
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Affiliation(s)
- Yigit Karasozen
- Department of Neurosurgery, University of Washington School of Medicine, Seattle, Washington 98195, USA
| | - Joshua W Osbun
- Department of Neurosurgery, University of Washington School of Medicine, Seattle, Washington 98195, USA
| | - Carolina Angelica Parada
- Department of Neurosurgery, University of Washington School of Medicine, Seattle, Washington 98195, USA
| | - Tina Busald
- Department of Neurosurgery, University of Washington School of Medicine, Seattle, Washington 98195, USA
| | - Philip Tatman
- Department of Neurosurgery, University of Washington School of Medicine, Seattle, Washington 98195, USA
| | - Luis F Gonzalez-Cuyar
- Department of Pathology, University of Washington School of Medicine, Seattle, Washington 98195, USA
| | - Christopher J Hale
- Department of Pathology, University of Washington School of Medicine, Seattle, Washington 98195, USA
| | - Diana Alcantara
- Genome Damage and Stability Centre, University of Sussex, Falmer, Brighton BN1 9RH, UK
| | - Mark O'Driscoll
- Genome Damage and Stability Centre, University of Sussex, Falmer, Brighton BN1 9RH, UK
| | - William B Dobyns
- Department of Pediatrics, University of Washington School of Medicine, Seattle, Washington 98195, USA; Department of Neurology, University of Washington School of Medicine, Seattle, Washington 98195, USA; Center for Integrative Brain Research, Seattle Children's Hospital, Seattle, Washington 98105, USA
| | - Mitzi Murray
- Department of Pathology, University of Washington School of Medicine, Seattle, Washington 98195, USA; Department of Medicine, Division of Genetics, University of Washington School of Medicine, Seattle, Washington 98195, USA
| | - Louis J Kim
- Department of Neurosurgery, University of Washington School of Medicine, Seattle, Washington 98195, USA
| | - Peter Byers
- Department of Pathology, University of Washington School of Medicine, Seattle, Washington 98195, USA; Department of Genome Sciences, University of Washington School of Medicine, Seattle, Washington 98195, USA; Department of Medicine, Division of Genetics, University of Washington School of Medicine, Seattle, Washington 98195, USA
| | - Michael O Dorschner
- Department of Pathology, University of Washington School of Medicine, Seattle, Washington 98195, USA; Department of Genome Sciences, University of Washington School of Medicine, Seattle, Washington 98195, USA
| | - Manuel Ferreira
- Department of Neurosurgery, University of Washington School of Medicine, Seattle, Washington 98195, USA.
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Santiago-Sim T, Fang X, Hennessy ML, Nalbach SV, DePalma SR, Lee MS, Greenway SC, McDonough B, Hergenroeder GW, Patek KJ, Colosimo SM, Qualmann KJ, Hagan JP, Milewicz DM, MacRae CA, Dymecki SM, Seidman CE, Seidman JG, Kim DH. THSD1 (Thrombospondin Type 1 Domain Containing Protein 1) Mutation in the Pathogenesis of Intracranial Aneurysm and Subarachnoid Hemorrhage. Stroke 2016; 47:3005-3013. [PMID: 27895300 PMCID: PMC5134902 DOI: 10.1161/strokeaha.116.014161] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Revised: 08/24/2016] [Accepted: 09/14/2016] [Indexed: 11/16/2022]
Abstract
BACKGROUND AND PURPOSE A ruptured intracranial aneurysm (IA) is the leading cause of a subarachnoid hemorrhage. This study seeks to define a specific gene whose mutation leads to disease. METHODS More than 500 IA probands and 100 affected families were enrolled and clinically characterized. Whole exome sequencing was performed on a large family, revealing a segregating THSD1 (thrombospondin type 1 domain containing protein 1) mutation. THSD1 was sequenced in other probands and controls. Thsd1 loss-of-function studies in zebrafish and mice were used for in vivo analyses and functional studies performed using an in vitro endothelial cell model. RESULTS A nonsense mutation in THSD1 was identified that segregated with the 9 affected (3 suffered subarachnoid hemorrhage and 6 had unruptured IA) and was absent in 13 unaffected family members (LOD score 4.69). Targeted THSD1 sequencing identified mutations in 8 of 507 unrelated IA probands, including 3 who had suffered subarachnoid hemorrhage (1.6% [95% confidence interval, 0.8%-3.1%]). These THSD1 mutations/rare variants were highly enriched in our IA patient cohort relative to 89 040 chromosomes in Exome Aggregation Consortium (ExAC) database (P<0.0001). In zebrafish and mice, Thsd1 loss-of-function caused cerebral bleeding (which localized to the subarachnoid space in mice) and increased mortality. Mechanistically, THSD1 loss impaired endothelial cell focal adhesion to the basement membrane. These adhesion defects could be rescued by expression of wild-type THSD1 but not THSD1 mutants identified in IA patients. CONCLUSIONS This report identifies THSD1 mutations in familial and sporadic IA patients and shows that THSD1 loss results in cerebral bleeding in 2 animal models. This finding provides new insight into IA and subarachnoid hemorrhage pathogenesis and provides new understanding of THSD1 function, which includes endothelial cell to extracellular matrix adhesion.
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Affiliation(s)
- Teresa Santiago-Sim
- From the Department of Neurosurgery (T.S.-S., X.F., G.W.H., K.J.P., S.M.C., K.J.Q., J.P.H., D.H.K.) and Division of Medical Genetics, Department of Internal Medicine (D.M.M.), The University of Texas Medical School at Houston; Department of Genetics, Harvard Medical School, Boston, MA (M.L.H., S.V.N., S.R.D., S.C.G., B.M., S.M.D., C.E.S., J.G.S.); Department of Neurosurgery (S.V.N.), Department of Medicine (M.S.L., C.A.M.), and Cardiovascular Division (C.E.S.), Brigham and Women's Hospital, Boston, MA; and Howard Hughes Medical Institute, Chevy Chase, MD (C.E.S.)
| | - Xiaoqian Fang
- From the Department of Neurosurgery (T.S.-S., X.F., G.W.H., K.J.P., S.M.C., K.J.Q., J.P.H., D.H.K.) and Division of Medical Genetics, Department of Internal Medicine (D.M.M.), The University of Texas Medical School at Houston; Department of Genetics, Harvard Medical School, Boston, MA (M.L.H., S.V.N., S.R.D., S.C.G., B.M., S.M.D., C.E.S., J.G.S.); Department of Neurosurgery (S.V.N.), Department of Medicine (M.S.L., C.A.M.), and Cardiovascular Division (C.E.S.), Brigham and Women's Hospital, Boston, MA; and Howard Hughes Medical Institute, Chevy Chase, MD (C.E.S.)
| | - Morgan L Hennessy
- From the Department of Neurosurgery (T.S.-S., X.F., G.W.H., K.J.P., S.M.C., K.J.Q., J.P.H., D.H.K.) and Division of Medical Genetics, Department of Internal Medicine (D.M.M.), The University of Texas Medical School at Houston; Department of Genetics, Harvard Medical School, Boston, MA (M.L.H., S.V.N., S.R.D., S.C.G., B.M., S.M.D., C.E.S., J.G.S.); Department of Neurosurgery (S.V.N.), Department of Medicine (M.S.L., C.A.M.), and Cardiovascular Division (C.E.S.), Brigham and Women's Hospital, Boston, MA; and Howard Hughes Medical Institute, Chevy Chase, MD (C.E.S.)
| | - Stephen V Nalbach
- From the Department of Neurosurgery (T.S.-S., X.F., G.W.H., K.J.P., S.M.C., K.J.Q., J.P.H., D.H.K.) and Division of Medical Genetics, Department of Internal Medicine (D.M.M.), The University of Texas Medical School at Houston; Department of Genetics, Harvard Medical School, Boston, MA (M.L.H., S.V.N., S.R.D., S.C.G., B.M., S.M.D., C.E.S., J.G.S.); Department of Neurosurgery (S.V.N.), Department of Medicine (M.S.L., C.A.M.), and Cardiovascular Division (C.E.S.), Brigham and Women's Hospital, Boston, MA; and Howard Hughes Medical Institute, Chevy Chase, MD (C.E.S.)
| | - Steven R DePalma
- From the Department of Neurosurgery (T.S.-S., X.F., G.W.H., K.J.P., S.M.C., K.J.Q., J.P.H., D.H.K.) and Division of Medical Genetics, Department of Internal Medicine (D.M.M.), The University of Texas Medical School at Houston; Department of Genetics, Harvard Medical School, Boston, MA (M.L.H., S.V.N., S.R.D., S.C.G., B.M., S.M.D., C.E.S., J.G.S.); Department of Neurosurgery (S.V.N.), Department of Medicine (M.S.L., C.A.M.), and Cardiovascular Division (C.E.S.), Brigham and Women's Hospital, Boston, MA; and Howard Hughes Medical Institute, Chevy Chase, MD (C.E.S.)
| | - Ming Sum Lee
- From the Department of Neurosurgery (T.S.-S., X.F., G.W.H., K.J.P., S.M.C., K.J.Q., J.P.H., D.H.K.) and Division of Medical Genetics, Department of Internal Medicine (D.M.M.), The University of Texas Medical School at Houston; Department of Genetics, Harvard Medical School, Boston, MA (M.L.H., S.V.N., S.R.D., S.C.G., B.M., S.M.D., C.E.S., J.G.S.); Department of Neurosurgery (S.V.N.), Department of Medicine (M.S.L., C.A.M.), and Cardiovascular Division (C.E.S.), Brigham and Women's Hospital, Boston, MA; and Howard Hughes Medical Institute, Chevy Chase, MD (C.E.S.)
| | - Steven C Greenway
- From the Department of Neurosurgery (T.S.-S., X.F., G.W.H., K.J.P., S.M.C., K.J.Q., J.P.H., D.H.K.) and Division of Medical Genetics, Department of Internal Medicine (D.M.M.), The University of Texas Medical School at Houston; Department of Genetics, Harvard Medical School, Boston, MA (M.L.H., S.V.N., S.R.D., S.C.G., B.M., S.M.D., C.E.S., J.G.S.); Department of Neurosurgery (S.V.N.), Department of Medicine (M.S.L., C.A.M.), and Cardiovascular Division (C.E.S.), Brigham and Women's Hospital, Boston, MA; and Howard Hughes Medical Institute, Chevy Chase, MD (C.E.S.)
| | - Barbara McDonough
- From the Department of Neurosurgery (T.S.-S., X.F., G.W.H., K.J.P., S.M.C., K.J.Q., J.P.H., D.H.K.) and Division of Medical Genetics, Department of Internal Medicine (D.M.M.), The University of Texas Medical School at Houston; Department of Genetics, Harvard Medical School, Boston, MA (M.L.H., S.V.N., S.R.D., S.C.G., B.M., S.M.D., C.E.S., J.G.S.); Department of Neurosurgery (S.V.N.), Department of Medicine (M.S.L., C.A.M.), and Cardiovascular Division (C.E.S.), Brigham and Women's Hospital, Boston, MA; and Howard Hughes Medical Institute, Chevy Chase, MD (C.E.S.)
| | - Georgene W Hergenroeder
- From the Department of Neurosurgery (T.S.-S., X.F., G.W.H., K.J.P., S.M.C., K.J.Q., J.P.H., D.H.K.) and Division of Medical Genetics, Department of Internal Medicine (D.M.M.), The University of Texas Medical School at Houston; Department of Genetics, Harvard Medical School, Boston, MA (M.L.H., S.V.N., S.R.D., S.C.G., B.M., S.M.D., C.E.S., J.G.S.); Department of Neurosurgery (S.V.N.), Department of Medicine (M.S.L., C.A.M.), and Cardiovascular Division (C.E.S.), Brigham and Women's Hospital, Boston, MA; and Howard Hughes Medical Institute, Chevy Chase, MD (C.E.S.)
| | - Kyla J Patek
- From the Department of Neurosurgery (T.S.-S., X.F., G.W.H., K.J.P., S.M.C., K.J.Q., J.P.H., D.H.K.) and Division of Medical Genetics, Department of Internal Medicine (D.M.M.), The University of Texas Medical School at Houston; Department of Genetics, Harvard Medical School, Boston, MA (M.L.H., S.V.N., S.R.D., S.C.G., B.M., S.M.D., C.E.S., J.G.S.); Department of Neurosurgery (S.V.N.), Department of Medicine (M.S.L., C.A.M.), and Cardiovascular Division (C.E.S.), Brigham and Women's Hospital, Boston, MA; and Howard Hughes Medical Institute, Chevy Chase, MD (C.E.S.)
| | - Sarah M Colosimo
- From the Department of Neurosurgery (T.S.-S., X.F., G.W.H., K.J.P., S.M.C., K.J.Q., J.P.H., D.H.K.) and Division of Medical Genetics, Department of Internal Medicine (D.M.M.), The University of Texas Medical School at Houston; Department of Genetics, Harvard Medical School, Boston, MA (M.L.H., S.V.N., S.R.D., S.C.G., B.M., S.M.D., C.E.S., J.G.S.); Department of Neurosurgery (S.V.N.), Department of Medicine (M.S.L., C.A.M.), and Cardiovascular Division (C.E.S.), Brigham and Women's Hospital, Boston, MA; and Howard Hughes Medical Institute, Chevy Chase, MD (C.E.S.)
| | - Krista J Qualmann
- From the Department of Neurosurgery (T.S.-S., X.F., G.W.H., K.J.P., S.M.C., K.J.Q., J.P.H., D.H.K.) and Division of Medical Genetics, Department of Internal Medicine (D.M.M.), The University of Texas Medical School at Houston; Department of Genetics, Harvard Medical School, Boston, MA (M.L.H., S.V.N., S.R.D., S.C.G., B.M., S.M.D., C.E.S., J.G.S.); Department of Neurosurgery (S.V.N.), Department of Medicine (M.S.L., C.A.M.), and Cardiovascular Division (C.E.S.), Brigham and Women's Hospital, Boston, MA; and Howard Hughes Medical Institute, Chevy Chase, MD (C.E.S.)
| | - John P Hagan
- From the Department of Neurosurgery (T.S.-S., X.F., G.W.H., K.J.P., S.M.C., K.J.Q., J.P.H., D.H.K.) and Division of Medical Genetics, Department of Internal Medicine (D.M.M.), The University of Texas Medical School at Houston; Department of Genetics, Harvard Medical School, Boston, MA (M.L.H., S.V.N., S.R.D., S.C.G., B.M., S.M.D., C.E.S., J.G.S.); Department of Neurosurgery (S.V.N.), Department of Medicine (M.S.L., C.A.M.), and Cardiovascular Division (C.E.S.), Brigham and Women's Hospital, Boston, MA; and Howard Hughes Medical Institute, Chevy Chase, MD (C.E.S.)
| | - Dianna M Milewicz
- From the Department of Neurosurgery (T.S.-S., X.F., G.W.H., K.J.P., S.M.C., K.J.Q., J.P.H., D.H.K.) and Division of Medical Genetics, Department of Internal Medicine (D.M.M.), The University of Texas Medical School at Houston; Department of Genetics, Harvard Medical School, Boston, MA (M.L.H., S.V.N., S.R.D., S.C.G., B.M., S.M.D., C.E.S., J.G.S.); Department of Neurosurgery (S.V.N.), Department of Medicine (M.S.L., C.A.M.), and Cardiovascular Division (C.E.S.), Brigham and Women's Hospital, Boston, MA; and Howard Hughes Medical Institute, Chevy Chase, MD (C.E.S.)
| | - Calum A MacRae
- From the Department of Neurosurgery (T.S.-S., X.F., G.W.H., K.J.P., S.M.C., K.J.Q., J.P.H., D.H.K.) and Division of Medical Genetics, Department of Internal Medicine (D.M.M.), The University of Texas Medical School at Houston; Department of Genetics, Harvard Medical School, Boston, MA (M.L.H., S.V.N., S.R.D., S.C.G., B.M., S.M.D., C.E.S., J.G.S.); Department of Neurosurgery (S.V.N.), Department of Medicine (M.S.L., C.A.M.), and Cardiovascular Division (C.E.S.), Brigham and Women's Hospital, Boston, MA; and Howard Hughes Medical Institute, Chevy Chase, MD (C.E.S.)
| | - Susan M Dymecki
- From the Department of Neurosurgery (T.S.-S., X.F., G.W.H., K.J.P., S.M.C., K.J.Q., J.P.H., D.H.K.) and Division of Medical Genetics, Department of Internal Medicine (D.M.M.), The University of Texas Medical School at Houston; Department of Genetics, Harvard Medical School, Boston, MA (M.L.H., S.V.N., S.R.D., S.C.G., B.M., S.M.D., C.E.S., J.G.S.); Department of Neurosurgery (S.V.N.), Department of Medicine (M.S.L., C.A.M.), and Cardiovascular Division (C.E.S.), Brigham and Women's Hospital, Boston, MA; and Howard Hughes Medical Institute, Chevy Chase, MD (C.E.S.)
| | - Christine E Seidman
- From the Department of Neurosurgery (T.S.-S., X.F., G.W.H., K.J.P., S.M.C., K.J.Q., J.P.H., D.H.K.) and Division of Medical Genetics, Department of Internal Medicine (D.M.M.), The University of Texas Medical School at Houston; Department of Genetics, Harvard Medical School, Boston, MA (M.L.H., S.V.N., S.R.D., S.C.G., B.M., S.M.D., C.E.S., J.G.S.); Department of Neurosurgery (S.V.N.), Department of Medicine (M.S.L., C.A.M.), and Cardiovascular Division (C.E.S.), Brigham and Women's Hospital, Boston, MA; and Howard Hughes Medical Institute, Chevy Chase, MD (C.E.S.)
| | - J G Seidman
- From the Department of Neurosurgery (T.S.-S., X.F., G.W.H., K.J.P., S.M.C., K.J.Q., J.P.H., D.H.K.) and Division of Medical Genetics, Department of Internal Medicine (D.M.M.), The University of Texas Medical School at Houston; Department of Genetics, Harvard Medical School, Boston, MA (M.L.H., S.V.N., S.R.D., S.C.G., B.M., S.M.D., C.E.S., J.G.S.); Department of Neurosurgery (S.V.N.), Department of Medicine (M.S.L., C.A.M.), and Cardiovascular Division (C.E.S.), Brigham and Women's Hospital, Boston, MA; and Howard Hughes Medical Institute, Chevy Chase, MD (C.E.S.)
| | - Dong H Kim
- From the Department of Neurosurgery (T.S.-S., X.F., G.W.H., K.J.P., S.M.C., K.J.Q., J.P.H., D.H.K.) and Division of Medical Genetics, Department of Internal Medicine (D.M.M.), The University of Texas Medical School at Houston; Department of Genetics, Harvard Medical School, Boston, MA (M.L.H., S.V.N., S.R.D., S.C.G., B.M., S.M.D., C.E.S., J.G.S.); Department of Neurosurgery (S.V.N.), Department of Medicine (M.S.L., C.A.M.), and Cardiovascular Division (C.E.S.), Brigham and Women's Hospital, Boston, MA; and Howard Hughes Medical Institute, Chevy Chase, MD (C.E.S.).
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