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Wang H, Nie W, Wang C, Wang Z, Zheng Y. Novel CPLANE1 c.8948dupT (p.P2984Tfs*7) variant in a child patient with Joubert syndrome. Open Life Sci 2023; 18:20220542. [PMID: 36789003 PMCID: PMC9896164 DOI: 10.1515/biol-2022-0542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 10/20/2022] [Accepted: 11/23/2022] [Indexed: 02/04/2023] Open
Abstract
Joubert syndrome (JBTS) is a class of heterogeneous ciliopathy genetically associated with CPLANE1 mutations. The characteristics of clinical phenotypes and CPLANE1 variants were analyzed in a 2-month-old patient. A 2-month-old patient with JBTS was diagnosed after clinical evaluation including family history, physical examination, cerebral MRI, ultrasonography imaging, VEGG, ocular fundus examination, and comprehensive blood and urine testing. Whole exome sequencing (WES) was performed to detect CPLANE1 variants, and Sanger sequencing was used to confirm the variants. This JBTS patient presented with oculomotor apraxia, dysregulation of breathing pattern, and ataxia. MRI revealed poor continuity of cerebelli, batwing appearance, and molar tooth sign. This patient was noted with abnormal hematology, dysregulation of hepatic function, thyroid function, immunity, and renal function, and encephalopathy. CPLANE1 (c.8948dupT (p.P2984Tfs*7) and c.247G > T (p.G83X)) variants were noticed in the patient as a pathogenic variant and caused autosomal recessive inheritance. The JBTS patient with mutations in CPLANE1 (c.8948dupT (p.P2984Tfs*7) and c.247G > T (p.G83X)) developed JBTS phenotypes. The novel CPLANE1 c.8948dupT (p.P2984Tfs*7) variant will assist clinicians and geneticists in reaching a precise diagnosis for JBTS.
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Affiliation(s)
- Huiping Wang
- Department of Neurology, Kunming Children’s Hospital, Kunming Children’s Hospital Affiliated with Kunming Medical University, No. 288, Qianxing Road, Xishan District, Kunming 650228, China
| | - Wensha Nie
- Department of Neurology, Kunming Children’s Hospital, Kunming Children’s Hospital Affiliated with Kunming Medical University, No. 288, Qianxing Road, Xishan District, Kunming 650228, China
| | - Chunxia Wang
- Department of Neurology, Kunming Children’s Hospital, Kunming Children’s Hospital Affiliated with Kunming Medical University, No. 288, Qianxing Road, Xishan District, Kunming 650228, China
| | - Zuohua Wang
- Department of Neurology, Kunming Children’s Hospital, Kunming Children’s Hospital Affiliated with Kunming Medical University, No. 288, Qianxing Road, Xishan District, Kunming 650228, China
| | - Yuxia Zheng
- Department of Neurology, Kunming Children’s Hospital, Kunming Children’s Hospital Affiliated with Kunming Medical University, No. 288, Qianxing Road, Xishan District, Kunming 650228, China
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Wang R, Liu C, Guo W, Wang L, Chen S, Zhao J, Qin X, Bai W, Yang Z, Kong D, Jia Z, Liu S, Zhang W. Movement disorder caused by FRRS1L deficiency may be associated with morphological and functional disorders in Purkinje cells. Brain Res Bull 2022; 191:93-106. [DOI: 10.1016/j.brainresbull.2022.10.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 10/06/2022] [Accepted: 10/25/2022] [Indexed: 11/30/2022]
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Habbash AS, Qatomah A, Al-Doban R, Asiri R. Parental knowledge of children's developmental milestones in Aseer, Saudi Arabia. J Family Med Prim Care 2022; 11:5093-5102. [PMID: 36505638 PMCID: PMC9730944 DOI: 10.4103/jfmpc.jfmpc_2029_21] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2021] [Revised: 12/15/2021] [Accepted: 12/16/2021] [Indexed: 11/07/2022] Open
Abstract
Background Better parental knowledge about developmental milestones of children is linked to better parent-child interaction. Only a handful of surveys have been conducted to evaluate parental knowledge of developme ntal milestones in Arabic-speaking countries. Materials and Methods The study is a cross-sectional, questionnaire-based observational investigation using a simple random sampling scheme. The sampling frame consisted of all parents attending the family medicine services during the period of conduct of the study. Poisson regression modelling techniques were used to analyse the adjusted effect of sociodemographic factors on knowledge score. Results Three hundred and seventy-five parents agreed to be included in the study. Only 29 (7.7%) had an excellent knowledge level. Poor knowledge was found among 141 (37.6%) participants. Also, 180 (48%) participants were found to have an acceptable level of knowledge. Mothers achieved acceptable knowledge of developmental milestones better than fathers, and better knowledge was found in less-crowded houses. Physical developmental milestones were known by 304 (81.1%) participants, followed by cognitive development milestones (n = 78, 20.8%), social development milestones (n = 47, 12.5%) and emotional development milestones (n = 85, 22.7%). The internet was the most used source (n = 83, 22.1%). The most avoided sources were educational workshops (n = 230, 61.3%), followed by doctors (n = 159, 42.4%) and social media (n = 130, 34.7%). Conclusions We confirmed in this work that parental knowledge of children's developmental milestones is suboptimum among Saudi parents. Use of the internet and avoidance of healthcare professionals is a source of concern. Care is required for children coming from overcrowded homes in terms of their developmental progress. Focus should be on educating parents about the social and emotional developmental milestones.
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Affiliation(s)
- Asma Saad Habbash
- Family and Community Medicine, King Khalid University, Abha, Saudi Arabia,Address for correspondence: Dr. Asma Saad Habbash, Family and Community Medicine, King Khalid University, Abha, Saudi Arabia. E-mail:
| | - Aishah Qatomah
- School of Medicine, King Khalid University, Abha, Saudi Arabia
| | - Rehab Al-Doban
- School of Medicine, King Khalid University, Abha, Saudi Arabia
| | - Raghad Asiri
- School of Medicine, King Khalid University, Abha, Saudi Arabia
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The Transition Zone Protein AHI1 Regulates Neuronal Ciliary Trafficking of MCHR1 and Its Downstream Signaling Pathway. J Neurosci 2021; 41:3932-3943. [PMID: 33741721 DOI: 10.1523/jneurosci.2993-20.2021] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2020] [Revised: 02/25/2021] [Accepted: 03/10/2021] [Indexed: 11/21/2022] Open
Abstract
The Abelson-helper integration site 1 (AHI1) gene encodes for a ciliary transition zone localizing protein that when mutated causes the human ciliopathy, Joubert syndrome. We prepared and examined neuronal cultures derived from male and female embryonic Ahi1 +/+ and Ahi1 -/- mice (littermates) and found that the distribution of ciliary melanin-concentrating hormone receptor-1 (MchR1) was significantly reduced in Ahi1 -/- neurons; however, the total and surface expression of MchR1 on Ahi1 -/- neurons was similar to controls (Ahi1 +/+). This indicates that a pathway for MchR1 trafficking to the surface plasma membrane is intact, but the process of targeting MchR1 into cilia is impaired in Ahi1-deficient mouse neurons, indicating a role for Ahi1 in localizing MchR1 to the cilium. Mouse Ahi1 -/- neurons that fail to accumulate MchR1 in the ciliary membrane have significant decreases in two downstream MchR1 signaling pathways [cAMP and extracellular signal-regulated kinase (Erk)] on MCH stimulation. These results suggest that the ciliary localization of MchR1 is necessary and critical for MchR1 signaling, with Ahi1 participating in regulating MchR1 localization to cilia, and further supporting cilia as critical signaling centers in neurons.SIGNIFICANCE STATEMENT Our work here demonstrates that neuronal primary cilia are powerful and focused signaling centers for the G-protein-coupled receptor (GPCR), melanin-concentrating hormone receptor-1 (MCHR1), with a role for the ciliary transition zone protein, Abelson-helper integration site 1 (AHI1), in mediating ciliary trafficking of MCHR1. Moreover, our manuscript further expands the repertoire of cilia functions on neurons, a cell type that has not received significant attention in the cilia field. Lastly, our work demonstrates the significant influence of ciliary GPCR signaling in the overall signaling of neurons.
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Wu RN, Hung WC, Chen CT, Tsai LP, Lai WS, Min MY, Wong SB. Firing activity of locus coeruleus noradrenergic neurons decreases in necdin-deficient mice, an animal model of Prader-Willi syndrome. J Neurodev Disord 2020; 12:21. [PMID: 32727346 PMCID: PMC7389383 DOI: 10.1186/s11689-020-09323-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Accepted: 07/17/2020] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND Prader-Willi syndrome (PWS) is a neurodevelopmental disorder characterized by multiple respiratory, cognitive, endocrine, and behavioral symptoms, such as central apnea, intellectual disabilities, exaggerated stress responses, and temper tantrums. The locus coeruleus noradrenergic system (LC-NE) modulates a diverse range of behaviors, including arousal, learning, pain modulation, and stress-induced negative affective states, which are possibly correlated with the pathogenesis of PWS phenotypes. Therefore, we evaluated the LC-NE neuronal activity of necdin-deficient mice, an animal model of PWS. METHODS Heterozygous necdin-deficient mice (B6.Cg-Ndntm1ky) were bred from wild-type (WT) females to generate WT (+m/+p) and heterozygotes (+m/-p) animals, which were examined of LC-NE neuronal activity, developmental reflexes, and plethysmography. RESULTS On slice electrophysiology, LC-NE neurons of Ndntm1ky mice with necdin deficiency showed significantly decreased spontaneous activities and impaired excitability, which was mediated by enhanced A-type voltage-dependent potassium currents. Ndntm1ky mice also exhibited the neonatal phenotypes of PWS, such as hypotonia and blunt respiratory responses to hypercapnia. CONCLUSIONS LC-NE neuronal firing activity decreased in necdin-deficient mice, suggesting that LC, the primary source of norepinephrine in the central nervous system, is possibly involved in PWS pathogenesis.
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Affiliation(s)
- Rui-Ni Wu
- Department of Pediatrics, Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, No. 289, Jiangguo Rd, Xindian Dist, New Taipei City, 23142, Taiwan
| | - Wei-Chen Hung
- Department of Life Science, College of Life Science, National Taiwan University, No. 1, Sec 4, Roosevelt Rd, Taipei, 10617, Taiwan
| | - Ching-Tsuey Chen
- Department of Life Science, College of Life Science, National Taiwan University, No. 1, Sec 4, Roosevelt Rd, Taipei, 10617, Taiwan
| | - Li-Ping Tsai
- Department of Pediatrics, Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, No. 289, Jiangguo Rd, Xindian Dist, New Taipei City, 23142, Taiwan
- School of Medicine, Tzu Chi University, No. 701, Sec 3, Jhongyang Rd, Hualien, 97071, Taiwan
| | - Wen-Sung Lai
- Department of Psychology, National Taiwan University, No. 1, Sec 4, Roosevelt Rd, Taipei, 10617, Taiwan
| | - Ming-Yuan Min
- Department of Life Science, College of Life Science, National Taiwan University, No. 1, Sec 4, Roosevelt Rd, Taipei, 10617, Taiwan
| | - Shi-Bing Wong
- Department of Pediatrics, Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, No. 289, Jiangguo Rd, Xindian Dist, New Taipei City, 23142, Taiwan.
- School of Medicine, Tzu Chi University, No. 701, Sec 3, Jhongyang Rd, Hualien, 97071, Taiwan.
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Muñoz-Estrada J, Ferland RJ. Ahi1 promotes Arl13b ciliary recruitment, regulates Arl13b stability and is required for normal cell migration. J Cell Sci 2019; 132:jcs.230680. [PMID: 31391239 DOI: 10.1242/jcs.230680] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Accepted: 07/24/2019] [Indexed: 12/14/2022] Open
Abstract
Mutations in the Abelson-helper integration site 1 (AHI1) gene are associated with neurological/neuropsychiatric disorders, and cause the neurodevelopmental ciliopathy Joubert syndrome (JBTS). Here, we show that deletion of the transition zone (TZ) protein Ahi1 in mouse embryonic fibroblasts (MEFs) has a small effect on cilia formation. However, Ahi1 loss in these cells results in: (1) reduced localization of the JBTS-associated protein Arl13b to the ciliary membrane, (2) decreased sonic hedgehog signaling, (3) and an abnormally elongated ciliary axoneme accompanied by an increase in ciliary IFT88 concentrations. While no changes in Arl13b levels are detected in crude cell membrane extracts, loss of Ahi1 significantly reduced the level of non-membrane-associated Arl13b and its stability via the proteasome pathway. Exogenous expression of Ahi1-GFP in Ahi1-/- MEFs restored ciliary length, increased ciliary recruitment of Arl13b and augmented Arl13b stability. Finally, Ahi1-/- MEFs displayed defects in cell motility and Pdgfr-α-dependent migration. Overall, our findings support molecular mechanisms underlying JBTS etiology that involve: (1) disruptions at the TZ resulting in defects of membrane- and non-membrane-associated proteins to localize to primary cilia, and (2) defective cell migration.This article has an associated First Person interview with the first author of the paper.
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Affiliation(s)
- Jesús Muñoz-Estrada
- Department of Neuroscience and Experimental Therapeutics, Albany Medical College, Albany, NY 12208, USA
| | - Russell J Ferland
- Department of Neuroscience and Experimental Therapeutics, Albany Medical College, Albany, NY 12208, USA .,Department of Neurology, Albany Medical College, Albany, NY 12208, USA
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