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Kalayci T, Altunoglu U, Çorbacioglu Esmer A, Avcı Ş, Sarac Sivrikoz T, Karaman B, Kalelioğlu İ, Has R, Uyguner ZO, Yüksel A, Başaran S, Kayserili H. Fetal skeletal dysplasia cohort of a single tertiary referral center in Istanbul, Turkey. Am J Med Genet A 2023; 191:498-509. [PMID: 36398383 DOI: 10.1002/ajmg.a.63050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 10/30/2022] [Accepted: 11/02/2022] [Indexed: 11/19/2022]
Abstract
We report on 314 fetal cases from 297 unrelated families with skeletal dysplasia evaluated in the postmortem period from 2000 to 2017 at a single clinical genetics center in İstanbul, Turkey. The definite diagnostic yield was 40% during the prenatal period, while it reached 74.5% when combined with postmortem clinical and radiological evaluation. Molecular analyses were performed in 25.5% (n: 76) of families, and 21 novel variants were identified. Classification according to International Skeletal Dysplasia Society-2019 revision revealed limb hypoplasia-reduction defects group (39) as the leading one, 24.5%, then followed by FGFR3 chondrodysplasias, osteogenesis imperfecta, and decreased mineralization and polydactyly-syndactyly-triphalangism groups 13.6, 11.1, and 8.9%, respectively. The inheritance pattern was autosomal recessive in 54% and autosomal dominant in 42.6% of index cases. The overall consanguinity rate of the cohort was 33%. The high prevalence of ultrarare diseases along with two or more unrelated autosomal recessive entities running in the same family was noteworthy. This study highlights the pivotal role of postmortem evaluation by an experienced clinical geneticist to achieve a high diagnostic yield in fetal skeletal dysplasia cohorts. The cohort is not only a representation of the spectrum of skeletal dysplasias in a population with a high consanguinity rate but also provides an ideal research group to work on to identify the unknowns of early fetal life.
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Affiliation(s)
- Tugba Kalayci
- Department of Medical Genetics, Istanbul University, Istanbul Faculty of Medicine, Istanbul, Turkey
| | - Umut Altunoglu
- Department of Medical Genetics, Istanbul University, Istanbul Faculty of Medicine, Istanbul, Turkey.,Department of Medical Genetics, Koc University School of Medicine (KUSOM), Istanbul, Turkey
| | - Aytul Çorbacioglu Esmer
- Department of Obstetrics and Gynecology, Division of Perinatology, Istanbul University, Istanbul Faculty of Medicine, Istanbul, Turkey
| | - Şahin Avcı
- Department of Medical Genetics, Istanbul University, Istanbul Faculty of Medicine, Istanbul, Turkey.,Department of Medical Genetics, Koc University School of Medicine (KUSOM), Istanbul, Turkey
| | - Tugba Sarac Sivrikoz
- Department of Obstetrics and Gynecology, Division of Perinatology, Istanbul University, Istanbul Faculty of Medicine, Istanbul, Turkey
| | - Birsen Karaman
- Department of Medical Genetics, Istanbul University, Istanbul Faculty of Medicine, Istanbul, Turkey
| | - İbrahim Kalelioğlu
- Department of Obstetrics and Gynecology, Division of Perinatology, Istanbul University, Istanbul Faculty of Medicine, Istanbul, Turkey
| | - Recep Has
- Department of Obstetrics and Gynecology, Division of Perinatology, Istanbul University, Istanbul Faculty of Medicine, Istanbul, Turkey
| | - Zehra Oya Uyguner
- Department of Medical Genetics, Istanbul University, Istanbul Faculty of Medicine, Istanbul, Turkey
| | - Atıl Yüksel
- Department of Obstetrics and Gynecology, Division of Perinatology, Istanbul University, Istanbul Faculty of Medicine, Istanbul, Turkey
| | - Seher Başaran
- Department of Medical Genetics, Istanbul University, Istanbul Faculty of Medicine, Istanbul, Turkey
| | - Hülya Kayserili
- Department of Medical Genetics, Istanbul University, Istanbul Faculty of Medicine, Istanbul, Turkey.,Department of Medical Genetics, Koc University School of Medicine (KUSOM), Istanbul, Turkey
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3
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Offiah AC, Vockley J, Munns CF, Murotsuki J. Differential diagnosis of perinatal hypophosphatasia: radiologic perspectives. Pediatr Radiol 2019; 49:3-22. [PMID: 30284005 PMCID: PMC6313373 DOI: 10.1007/s00247-018-4239-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Revised: 06/25/2018] [Accepted: 08/14/2018] [Indexed: 01/13/2023]
Abstract
Perinatal hypophosphatasia (HPP) is a rare, potentially life-threatening, inherited, systemic metabolic bone disease that can be difficult to recognize in utero and postnatally. Diagnosis is challenging because of the large number of skeletal dysplasias with overlapping clinical features. This review focuses on the role of fetal and neonatal imaging modalities in the differential diagnosis of perinatal HPP from other skeletal dysplasias (e.g., osteogenesis imperfecta, campomelic dysplasia, achondrogenesis subtypes, hypochondrogenesis, cleidocranial dysplasia). Perinatal HPP is associated with a broad spectrum of imaging findings that are characteristic of but do not occur in all cases of HPP and are not unique to HPP, such as shortening, bowing and angulation of the long bones, and slender, poorly ossified ribs and metaphyseal lucencies. Conversely, absent ossification of whole bones is characteristic of severe lethal HPP and is associated with very few other conditions. Certain features may help distinguish HPP from other skeletal dysplasias, such as sites of angulation of long bones, patterns of hypomineralization, and metaphyseal characteristics. In utero recognition of HPP allows for the assembly and preparation of a multidisciplinary care team before delivery and provides additional time to devise treatment strategies.
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Affiliation(s)
- Amaka C Offiah
- Academic Unit of Child Health, Sheffield Children's NHS Foundation Trust, University of Sheffield, Western Bank, Sheffield, S10 2TH, UK.
| | - Jerry Vockley
- School of Medicine and Children's Hospital of Pittsburgh, University of Pittsburgh, Pittsburgh, PA, USA
| | - Craig F Munns
- The Children's Hospital at Westmead, Westmead, NSW, Australia
- Sydney Medical School, The University of Sydney, University of Sydney NSW, Sydney, Australia
| | - Jun Murotsuki
- Aoba Ward, Miyagi Children's Hospital, Sendai, Miyagi Prefecture, Japan
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Qiu Y, Mekkat A, Yu H, Yigit S, Hamaia S, Farndale RW, Kaplan DL, Lin YS, Brodsky B. Collagen Gly missense mutations: Effect of residue identity on collagen structure and integrin binding. J Struct Biol 2018; 203:255-262. [PMID: 29758270 DOI: 10.1016/j.jsb.2018.05.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2018] [Revised: 05/09/2018] [Accepted: 05/10/2018] [Indexed: 01/31/2023]
Abstract
Gly missense mutations in type I collagen, which replace a conserved Gly in the repeating (Gly-Xaa-Yaa)n sequence with a larger residue, are known to cause Osteogenesis Imperfecta (OI). The clinical consequences of such mutations range from mild to lethal, with more serious clinical severity associated with larger Gly replacement residues. Here, we investigate the influence of the identity of the residue replacing Gly within and adjacent to the integrin binding 502GFPGER507 sequence on triple-helix structure, stability and integrin binding using a recombinant bacterial collagen system. Recombinant collagens were constructed with Gly substituted by Ala, Ser or Val at four positions within the integrin binding region. All constructs formed a stable triple-helix structure with a small decrease in melting temperature. Trypsin was used to probe local disruption of the triple helix, and Gly to Val replacements made the triple helix trypsin sensitive at three of the four sites. Any mutation at Gly505, eliminated integrin binding, while decreased integrin binding affinity was observed in the replacement of Gly residues at Gly502 following the order Val > Ser > Ala. Molecular dynamics simulations indicated that all Gly replacements led to transient disruption of triple-helix interchain hydrogen bonds in the region of the Gly replacement. These computational and experimental results lend insight into the complex molecular basis of the varying clinical severity of OI.
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Affiliation(s)
- Yimin Qiu
- Department of Biomedical Engineering, Tufts University, United States
| | - Arya Mekkat
- Department of Chemistry, Tufts University, United States
| | - Hongtao Yu
- Department of Biomedical Engineering, Tufts University, United States; Department of Chemistry, Tufts University, United States
| | - Sezin Yigit
- Department of Biomedical Engineering, Tufts University, United States
| | - Samir Hamaia
- Department of Biochemistry, University of Cambridge, Cambridge, UK
| | | | - David L Kaplan
- Department of Biomedical Engineering, Tufts University, United States
| | - Yu-Shan Lin
- Department of Chemistry, Tufts University, United States
| | - Barbara Brodsky
- Department of Biomedical Engineering, Tufts University, United States.
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5
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Bellur S, Jain M, Cuthbertson D, Krakow D, Shapiro JR, Steiner RD, Smith PA, Bober MB, Hart T, Krischer J, Mullins M, Byers PH, Pepin M, Durigova M, Glorieux FH, Rauch F, Sutton VR, Lee B, Nagamani SC. Cesarean delivery is not associated with decreased at-birth fracture rates in osteogenesis imperfecta. Genet Med 2015; 18:570-6. [PMID: 26426884 PMCID: PMC4818203 DOI: 10.1038/gim.2015.131] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2015] [Accepted: 08/14/2015] [Indexed: 11/18/2022] Open
Abstract
Purpose Osteogenesis imperfecta (OI) predisposes to recurrent fractures. The moderate-to-severe forms of OI present with antenatal fractures and the mode of delivery that would be safest for the fetus is not known. Methods We conducted systematic analyses on the largest cohort of individuals (n=540) with OI enrolled to-date in the OI Linked Clinical Research Centers. Self-reported at-birth fracture rates were compared in individuals with OI types I, III, and IV. Multivariate analyses utilizing backward-elimination logistic regression model building were performed to assess the effect of multiple covariates including method of delivery on fracture-related outcomes. Results When accounting for other covariates, at-birth fracture rates did not differ based on whether delivery was by vaginal route or by cesarean section (CS). Increased birth weight conferred higher risk for fractures irrespective of the delivery method. In utero fracture, maternal history of OI, and breech presentation were strong predictors for choosing CS for delivery. Conclusion Our study, the largest to analyze the effect of various factors on at-birth fracture rates in OI shows that delivery by CS is not associated with decreased fracture rate. With the limitation that the fracture data were self-reported in this cohort, these results suggest that CS should be performed only for other maternal or fetal indications, but not for the sole purpose of fracture prevention in OI.
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Affiliation(s)
- S Bellur
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA
| | - M Jain
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA
| | - D Cuthbertson
- College of Medicine, University of South Florida, Tampa, Florida, USA
| | - D Krakow
- Department of Orthopedic Surgery, University of California, Los Angeles, California, USA.,Department of Human Genetics, University of California, Los Angeles, California, USA.,Department of Obstetrics and Gynecology, University of California, Los Angeles, California, USA
| | - J R Shapiro
- Department of Bone and Osteogenesis Imperfecta, Kennedy Krieger Institute, Baltimore, Maryland, USA
| | - R D Steiner
- Department of Pediatrics, Oregon Health & Science University, Portland, Oregon, USA.,Department of Molecular and Medical Genetics, Oregon Health & Science University, Portland, Oregon, USA.,Marshfield Clinic Research Foundation and University of Wisconsin, Marshfield and Madison, Wisconsin, USA
| | - P A Smith
- Shriners Hospitals for Children, Chicago, Illinois, USA
| | - M B Bober
- Division of Medical Genetics, Alfred I. DuPont Hospital for Children, Wilmington, Delaware, USA
| | - T Hart
- Osteogenesis Imperfecta Foundation, Gaithersburg, Maryland, USA
| | - J Krischer
- College of Medicine, University of South Florida, Tampa, Florida, USA
| | - M Mullins
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA
| | - P H Byers
- Department of Medicine, Division of Medical Genetics, University of Washington, Seattle, Washington, USA.,Department of Pathology, Division of Medical Genetics, University of Washington, Seattle, Washington, USA
| | - M Pepin
- Department of Medicine, Division of Medical Genetics, University of Washington, Seattle, Washington, USA.,Department of Pathology, Division of Medical Genetics, University of Washington, Seattle, Washington, USA
| | - M Durigova
- Department of Orthopedic Surgery, Shriners Hospital for Children and McGill University, Montreal, Québec, Canada
| | - F H Glorieux
- Department of Orthopedic Surgery, Shriners Hospital for Children and McGill University, Montreal, Québec, Canada
| | - F Rauch
- Department of Orthopedic Surgery, Shriners Hospital for Children and McGill University, Montreal, Québec, Canada
| | - V R Sutton
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA.,Texas Children's Hospital, Houston, Texas, USA
| | - B Lee
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA.,Texas Children's Hospital, Houston, Texas, USA
| | | | - S C Nagamani
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA.,Texas Children's Hospital, Houston, Texas, USA
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