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Kudo T, Kawasaki M, Kawasaki K, Meguro F, Nihara J, Honda I, Kitamura M, Fujita A, Osawa K, Ichikawa K, Nagai T, Ishida Y, Sharpe PT, Maeda T, Saito I, Ohazama A. Ift88 regulates enamel formation via involving Shh signaling. Oral Dis 2022; 29:1622-1631. [PMID: 35189017 DOI: 10.1111/odi.14162] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Revised: 02/04/2022] [Accepted: 02/17/2022] [Indexed: 11/28/2022]
Abstract
OBJECTIVES The ciliopathies are a wide spectrum of human diseases, which are caused by perturbations in the function of primary cilia. Tooth enamel anomalies are often seen in ciliopathy patients; however, the role of primary cilia in enamel formation remains unclear. MATERIALS AND METHODS We examined mice with epithelial conditional deletion of the ciliary protein, Ift88, (Ift88fl/fl ;K14Cre). RESULTS Ift88fl/fl ;K14Cre mice showed premature abrasion in molars. A pattern of enamel rods which is determined at secretory stage, was disorganized in Ift88 mutant molars. Many amelogenesis-related molecules expressing at the secretory stage, including amelogenin and ameloblastin, enamelin, showed significant downregulation in Ift88 mutant molar tooth germs. Shh signaling is essential for amelogenesis, which was found to be downregulated in Ift88 mutant molar at the secretory stage. Application of Shh signaling agonist at the secretory stage partially rescued enamel anomalies in Ift88 mutant mice. CONCLUSION Findings in the present study indicate that the function of the primary cilia via Ift88 is critical for the secretory stage of amelogenesis through involving Shh signaling.
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Affiliation(s)
- Takehisa Kudo
- Division of Oral Anatomy, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan.,Division of Orthodontics, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
| | - Maiko Kawasaki
- Division of Oral Anatomy, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
| | - Kataushige Kawasaki
- Division of Oral Anatomy, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan.,Research Center for Advanced Oral Science, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
| | - Fumiya Meguro
- Division of Oral Anatomy, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
| | - Jun Nihara
- Division of Oral Anatomy, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan.,Division of Orthodontics, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
| | - Izumi Honda
- Division of Oral Anatomy, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan.,Division of Orthodontics, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
| | - Madoka Kitamura
- Division of Oral Anatomy, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan.,Division of Orthodontics, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
| | - Akira Fujita
- Division of Orthodontics, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
| | - Kazuaki Osawa
- Division of Orthodontics, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
| | - Kaya Ichikawa
- Division of Orthodontics, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
| | - Takahiro Nagai
- Division of Oral Anatomy, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan.,Division of Oral and Maxillofacial Surgery, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
| | - Yoko Ishida
- Research Center for Advanced Oral Science, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
| | - Paul T Sharpe
- Centre for Craniofacial & Regenerative Biology, Faculty of Dentistry, Oral & Craniofacial Sciences, King's College London, Guy's Hospital, London, SE1 9RT, UK
| | - Takeyasu Maeda
- Division of Oral and Maxillofacial Surgery, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan.,Faculty of Dental Medicine, University of Airlangga, Surabaya, Indonesia
| | - Isao Saito
- Division of Orthodontics, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
| | - Atsushi Ohazama
- Division of Oral Anatomy, Faculty of Dentistry & Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
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Sensenbrenner syndrome: a further challenge in evaluating sagittal synostosis and a need for a multidisciplinary approach. Childs Nerv Syst 2021; 37:1695-1701. [PMID: 33606107 DOI: 10.1007/s00381-021-05075-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Accepted: 02/04/2021] [Indexed: 10/22/2022]
Abstract
BACKGROUND Sensenbrenner syndrome, also known as cranioectodermal dysplasia (CED), is a genetically heterogeneous ciliopathy, characterized by dysmorphic features including dolichocephaly (with inconstant sagittal craniosynostosis), chronic kidney disease (CKD), hepatic fibrosis, retinitis pigmentosa, and brain abnormalities, with a partial clinical overlap with other ciliopathies. PATIENTS AND METHODS A retrospective review of four children with Sensenbrenner syndrome treated at the Femme Mère Enfant University Hospital of Lyon from 2005 to 2020 was conducted. RESULTS Variants in WDR35 or WDR19 were found in all children. Two of them underwent surgery for a scaphocephaly in the first months of life. All patients developed CKD leading to end-stage renal disease during the first/second decades. DISCUSSION The diagnosis of scaphocephaly may precede the diagnosis of the underlying Sensenbrenner syndrome, thus highlighting the importance of a systematic multidisciplinary assessment and follow-up for craniosynostoses, in order to identify syndromic forms requiring specific management. In Sensenbrenner syndrome, patients' management should be coordinated by multidisciplinary teams of reference centers for rare diseases, with expertise in the management of craniofacial malformations as well as rare skeletal and renal disorders. Indeed, a prompt etiological diagnosis will result in an early diagnosis of multisystemic complications, notably renal involvement, thus improving global prognosis.
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Pech Gourg G, Serratrice N, Gallucci A, Scavarda D. Upward vectors for osteogenic distraction treatment in secondary chronic intracranial hypertension in children undergoing scaphocephaly surgery: 2 cases reported. Childs Nerv Syst 2020; 36:1325-1330. [PMID: 31925509 DOI: 10.1007/s00381-019-04491-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Accepted: 12/30/2019] [Indexed: 10/25/2022]
Abstract
The occurrence of secondary synostosis of coronal sutures at distance from H-craniectomy surgery for scaphocephaly concerns about 10% of children. Intracranial hypertension in these children remains exceptional but generally requires a surgical reoperation. Two children aged 3 and 5- months- old had been operated for scaphocephaly by H-craniectomy in two different hospital centers. Their clinical follow-up described a partial persistence of dolichocephalic deformity and an impression of parietal stenosis. During their growth, chronic headaches appeared with a complaint expressed at the ages of 4 and 5 years. In both cases, ophthalmic examination revealed significant bilateral papillary edema without loss of visual acuity. The imaging assessment (CT-scan and MRI) showed the absence of Chiari malformation and venous abnormality. For both, there was a compression image of the parietal lobes in relation to the persistence of a temporoparietal synostosis. An osteogenic parietal distraction permitted a volumetric brain expansion consecutive to the skull and meninges remodeling in only 6 months, associated with a leap forward acquisition, a normalization of the ophthalmic examination, and a complete loss of headaches. In conclusion, this new approach could be used in the case of chronic intracranial hypertension consecutive to a secondary parietal synostosis after a scaphocephaly surgery.
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Affiliation(s)
- G Pech Gourg
- Department of Pediatric Neurosurgery, La Timone Enfant Hospital, Assistance Publique - Hôpitaux de Marseille, Marseille, France
| | - N Serratrice
- Department of Pediatric Neurosurgery, La Timone Enfant Hospital, Assistance Publique - Hôpitaux de Marseille, Marseille, France.
| | - A Gallucci
- Department of Maxillofacial Surgery, La Timone Enfant Hospital, Assistance Publique - Hôpitaux de Marseille, Marseille, France
| | - D Scavarda
- Department of Pediatric Neurosurgery, La Timone Enfant Hospital, Assistance Publique - Hôpitaux de Marseille, Marseille, France
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