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Li Z, Li J, Wu Z, Zhu Y, Zhuo T, Nong J, Qian J, Peng H, Dai L, Wang Y, Chen M, Zeng X. Upregulation of POC1A in lung adenocarcinoma promotes tumour progression and predicts poor prognosis. J Cell Mol Med 2024; 28:e18135. [PMID: 38429900 PMCID: PMC10907829 DOI: 10.1111/jcmm.18135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 12/13/2023] [Accepted: 12/19/2023] [Indexed: 03/03/2024] Open
Abstract
Lung adenocarcinoma (LUAD) is characterized by a high incidence rate and mortality. Recently, POC1 centriolar protein A (POC1A) has emerged as a potential biomarker for various cancers, contributing to cancer onset and development. However, the association between POC1A and LUAD remains unexplored. We extracted The Cancer Genome Atlas (TCGA) and the Gene Expression Omnibus (GEO) data sets to analyse the differential expression of POC1A and its relationship with clinical stage. Additionally, we performed diagnostic receiver operator characteristic (ROC) curve analysis and Kaplan-Meier (KM) survival analysis to assess the diagnostic and prognostic value of POC1A in LUAD. Furthermore, we investigated the correlation between POC1A expression and immune infiltration, tumour mutation burden (TMB), immune checkpoint expression and drug sensitivity. Finally, we verified POC1A expression using real-time quantitative polymerase chain reaction (RT-qPCR) and immunohistochemistry (IHC). Cell experiments were conducted to validate the effect of POC1A expression on the proliferation, migration and invasion of lung cancer cells. POC1A exhibited overexpression in most tumour tissues, and its overexpression in LUAD was significantly correlated with late-stage presentation and poor prognosis. The high POC1A expression group showed lower levels of immune infiltration but higher levels of immune checkpoint expression and TMB. Moreover, the high POC1A expression group demonstrated sensitivity to multiple drugs. In vitro experiments confirmed that POC1A knockdown led to decreased proliferation, migration, and invasion of lung cancer cells. Our findings suggest that POC1A may contribute to tumour development by modulating the cell cycle and immune cell infiltration. It also represents a potential therapeutic target and marker for the diagnosis and prognosis of LUAD.
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Affiliation(s)
- Zi‐Hao Li
- Department of Cardio‐Thoracic SurgeryThe First Affiliated Hospital of Guangxi Medical UniversityNanningGuangxiChina
| | - Jia‐Yi Li
- Geriatrics Department of Endocrinology and MetabolismThe First Affiliated Hospital of Guangxi Medical UniversityNanningGuangxiChina
| | - Zuo‐Tao Wu
- Department of Cardio‐Thoracic SurgeryThe First Affiliated Hospital of Guangxi Medical UniversityNanningGuangxiChina
| | - Yong‐Jie Zhu
- Department of Cardio‐Thoracic SurgeryThe First Affiliated Hospital of Guangxi Medical UniversityNanningGuangxiChina
| | - Ting Zhuo
- Department of Respiratory MedicineThe First Affiliated Hospital of Guangxi Medical UniversityNanningGuangxiChina
| | - Ju‐Sen Nong
- Department of Pediatric SurgeryThe First Affiliated Hospital of Guangxi Medical UniversityNanningGuangxiChina
| | - Jing Qian
- Department of Cardio‐Thoracic SurgeryThe First Affiliated Hospital of Guangxi Medical UniversityNanningGuangxiChina
| | - Hua‐Jian Peng
- Department of Cardio‐Thoracic SurgeryThe First Affiliated Hospital of Guangxi Medical UniversityNanningGuangxiChina
| | - Lei Dai
- Department of Cardio‐Thoracic SurgeryThe First Affiliated Hospital of Guangxi Medical UniversityNanningGuangxiChina
| | - Yong‐Yong Wang
- Department of Cardio‐Thoracic SurgeryThe First Affiliated Hospital of Guangxi Medical UniversityNanningGuangxiChina
| | - Ming‐Wu Chen
- Department of Cardio‐Thoracic SurgeryThe First Affiliated Hospital of Guangxi Medical UniversityNanningGuangxiChina
| | - Xiao‐Chun Zeng
- Department of Cardio‐Thoracic SurgeryThe First Affiliated Hospital of Guangxi Medical UniversityNanningGuangxiChina
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Perge K, Capel E, Villanueva C, Gautheron J, Diallo S, Auclair M, Rondeau S, Morichon R, Brioude F, Jéru I, Rossi M, Nicolino M, Vigouroux C. Ciliopathy due to POC1A deficiency: clinical and metabolic features, and cellular modeling. Eur J Endocrinol 2024; 190:151-164. [PMID: 38245004 DOI: 10.1093/ejendo/lvae009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Revised: 01/08/2024] [Accepted: 01/15/2024] [Indexed: 01/22/2024]
Abstract
OBJECTIVE SOFT syndrome (MIM#614813), denoting Short stature, Onychodysplasia, Facial dysmorphism, and hypoTrichosis, is a rare primordial dwarfism syndrome caused by biallelic variants in POC1A, encoding a centriolar protein. SOFT syndrome, characterized by severe growth failure of prenatal onset and dysmorphic features, was recently associated with insulin resistance. This study aims to further explore its endocrinological features and pathophysiological mechanisms. DESIGN/METHODS We present clinical, biochemical, and genetic features of 2 unrelated patients carrying biallelic pathogenic POC1A variants. Cellular models of the disease were generated using patients' fibroblasts and POC1A-deleted human adipose stem cells. RESULTS Both patients present with clinical features of SOFT syndrome, along with hyperinsulinemia, diabetes or glucose intolerance, hypertriglyceridemia, liver steatosis, and central fat distribution. They also display resistance to the effects of IGF-1. Cellular studies show that the lack of POC1A protein expression impairs ciliogenesis and adipocyte differentiation, induces cellular senescence, and leads to resistance to insulin and IGF-1. An altered subcellular localization of insulin receptors and, to a lesser extent, IGF1 receptors could also contribute to resistance to insulin and IGF1. CONCLUSIONS Severe growth retardation, IGF-1 resistance, and centripetal fat repartition associated with insulin resistance-related metabolic abnormalities should be considered as typical features of SOFT syndrome caused by biallelic POC1A null variants. Adipocyte dysfunction and cellular senescence likely contribute to the metabolic consequences of POC1A deficiency. SOFT syndrome should be included within the group of monogenic ciliopathies with metabolic and adipose tissue involvement, which already encompasses Bardet-Biedl and Alström syndromes.
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Affiliation(s)
- Kevin Perge
- Pediatric Endocrinology, Diabetology and Metabolism Department, Femme Mère Enfant Hospital, Hospices Civils de Lyon, Bron F69500, France
- Claude Bernard University, Lyon 1, Lyon F69100, France
| | - Emilie Capel
- Sorbonne University, Inserm U938, Saint-Antoine Research Centre, and Institute of Cardiometabolism and Nutrition, F75012 Paris, France
| | - Carine Villanueva
- Pediatric Endocrinology, Diabetology and Metabolism Department, Femme Mère Enfant Hospital, Hospices Civils de Lyon, Bron F69500, France
| | - Jérémie Gautheron
- Sorbonne University, Inserm U938, Saint-Antoine Research Centre, and Institute of Cardiometabolism and Nutrition, F75012 Paris, France
| | - Safiatou Diallo
- Sorbonne University, Inserm U938, Saint-Antoine Research Centre, and Institute of Cardiometabolism and Nutrition, F75012 Paris, France
| | - Martine Auclair
- Sorbonne University, Inserm U938, Saint-Antoine Research Centre, and Institute of Cardiometabolism and Nutrition, F75012 Paris, France
| | - Sophie Rondeau
- Department of Molecular Biology, Assistance Publique-Hôpitaux de Paris, Necker Enfants Malades Hospital, Paris F75015, France
| | - Romain Morichon
- Sorbonne University, Inserm U938, Saint-Antoine Research Centre, and Institute of Cardiometabolism and Nutrition, F75012 Paris, France
- Cytometry and Imagery platform Saint-Antoine (CISA), Inserm UMS30 Lumic, Paris F75012, France
| | - Frédéric Brioude
- Sorbonne University, Inserm U938, Saint-Antoine Research Centre, and Institute of Cardiometabolism and Nutrition, F75012 Paris, France
- Department of Molecular Biology and Genetics, Assistance Publique-Hôpitaux de Paris, Armand Trousseau University Hospital, Paris F75012, France
| | - Isabelle Jéru
- Sorbonne University, Inserm U938, Saint-Antoine Research Centre, and Institute of Cardiometabolism and Nutrition, F75012 Paris, France
- Department of Molecular Biology and Genetics, Assistance Publique-Hôpitaux de Paris, Saint-Antoine University Hospital, Paris F75012, France
| | - Massimiliamo Rossi
- Genetics Department, Referral Center for Skeletal Dysplasias, Femme Mère Enfant Hospital, Hospices Civils de Lyon, Lyon F69500, France
- UMR5292, Lyon Neuroscience Research Center, INSERM U1028, CNRS, GENDEV Team, Bron F69500, France
| | - Marc Nicolino
- Pediatric Endocrinology, Diabetology and Metabolism Department, Femme Mère Enfant Hospital, Hospices Civils de Lyon, Bron F69500, France
- Claude Bernard University, Lyon 1, Lyon F69100, France
| | - Corinne Vigouroux
- Sorbonne University, Inserm U938, Saint-Antoine Research Centre, and Institute of Cardiometabolism and Nutrition, F75012 Paris, France
- Department of Molecular Biology and Genetics, Assistance Publique-Hôpitaux de Paris, Saint-Antoine University Hospital, Paris F75012, France
- Department of Endocrinology, Diabetology and Reproductive Endocrinology, Assistance Publique-Hôpitaux de Paris, Saint-Antoine University Hospital, National Reference Center for Rare Diseases of Insulin Secretion and Insulin Sensitivity (PRISIS), Paris F75012, France
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Li D, Li S, Zhou J, Zheng L, Liu G, Ding C, Yuan X. Case Report: Identification of a rare nonsense mutation in the POC1A gene by NGS in a diabetes mellitus patient. Front Genet 2023; 14:1113314. [PMID: 37056285 PMCID: PMC10086226 DOI: 10.3389/fgene.2023.1113314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Accepted: 02/14/2023] [Indexed: 03/30/2023] Open
Abstract
Objective: This study aimed to investigate the clinical and molecular biology of a patient with a type of diabetes mellitus caused by a mutation in the POC1A (OMIM number: 614783) gene and explore its pathogenesis and related characteristics.Methods: The patient was interviewed about his medical history and subjected to relevant examinations. Blood DNA samples were collected from the patient and his family members (parents) for trio whole-exome sequencing. Whole-exome sequencing was performed using the IDT xGen Exome Research Panel v1.0 whole-exome capture chip and sequenced using an Illumina NovaSeq 6,000 series sequencer (PE150); the sequencing coverage of the target sequence was not less than 99%. After systematic analysis and screening of the cloud platform for accurate diagnosis of genetic diseases, which integrated molecular biology annotation, biology, genetics, and clinical feature analysis, combined with a pathogenic mutation database, normal human genome database, and clinical feature database of 4,000 known genetic diseases, hundreds of thousands of gene variants were graded using the gene data analysis algorithm, a three-element grading system, and the American Society of Medical Genetics gene variant grading system. After polymerase chain reaction testing, the target sequence was verified by Sanger sequencing using an ABI3730 sequencer, and the verification result was obtained using sequence analysis software.Results: The patient had a peculiar face, a thin body, and a body mass index of 16.0 kg/m2. His fasting connecting peptide was 10.2 ug/L, his fasting insulin was 44 mIU/L, his fasting blood glucose was 10.5 mmol/L, and his glycosylated haemoglobin was 12.5%. After hospitalisation, the patient was given 0.75 g/d metformin tablets and 15 mg/d pioglitazone dispersible tablets, and his fasting blood glucose reduced to 9.2 mmol/L. After 48 U/L insulin treatment, the patient’s fasting blood glucose was reduced to 8.5 mmol/L. Genetic screening revealed that there was a pathogenic variant at the POC1A gene locus and a cytosine-to-thymine mutation at the G81 locus, turning the Arg to a termination codon and shortening the POC1A protein from 359 amino acids (aa) to 80 aa. No mutation was detected in the patient’s parents’ POC1A gene loci.Conclusion: The patient’s diabetes was caused by a POC1A gene mutation at the G81 locus, which is rarely reported in the clinic. The specific manifestations of this mutation need to be further investigated.
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Batu Oto B, Ağırbaşlı D, Kılıçarslan O, Celik G, Kalayci Yigin A, Seven M, Yetik H. Pigmentary retinopathy with perivascular sparing in a SOFT syndrome patient with a novel homozygous splicing variant in POC1A gene. Ophthalmic Genet 2023; 44:70-73. [PMID: 35930384 DOI: 10.1080/13816810.2022.2103837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Abstract
PURPOSE SOFT syndrome is an extremely rare inherited dwarfism syndrome. The syndrome has four major clinical manifestations: short stature, onychodysplasia, facial dysmorphism, and hypotrichosis. Herein, we report a unique case of a SOFT syndrome with findings of pigmentary retinopathy. METHODS Case report. RESULTS A 3-year boy was referred to our clinic for ophthalmologic examination from Genetic Diseases Diagnosis Center. In ophthalmic examination, anterior segment was normal bilaterally in biomicroscopy. Fundus examination revealed bilateral yellow-white punctate retinal pigment epithelium lesions located in the midperipheral retina. Macula optical coherence tomography was bilaterally normal. Whole exome sequencing (WES) analysis revealed a homozygous intronic splice site variant (c.103 + 1 G>T) in POC1A, hemizygous intronic splice site variant (c.459-5T>A) in TBX22, and a heterozygous missense variant (c.2254 C>T) in DDR2 genes. CONCLUSION There is a limited number of reported cases with SOFT syndrome and, though retinal findings in SOFT syndrome have been reported in two cases previously, none were given in detail. According to our findings, perivascular and macula sparing midperipheral retina pigment epithelium changes could be observed in patients with SOFT syndrome.
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Affiliation(s)
- Bilge Batu Oto
- Department of Ophthalmology, Cerrahpasa Medical Faculty, Istanbul University- Cerrahpasa, Istanbul, Turkey
| | - Deniz Ağırbaşlı
- Department of Medical Genetics, Cerrahpasa Medical Faculty, Istanbul University- Cerrahpasa, Istanbul, Turkey
| | - Oğuzhan Kılıçarslan
- Department of Ophthalmology, Cerrahpasa Medical Faculty, Istanbul University- Cerrahpasa, Istanbul, Turkey
| | - Gökhan Celik
- Department of Ophthalmology, ROP Screening, Treatment and Training Center, Zeynep Kamil Maternity and Children's Disease Training and Research Hospital, Istanbul, Turkey
| | - Aysel Kalayci Yigin
- Department of Medical Genetics, Cerrahpasa Medical Faculty, Istanbul University- Cerrahpasa, Istanbul, Turkey
| | - Mehmet Seven
- Department of Medical Genetics, Cerrahpasa Medical Faculty, Istanbul University- Cerrahpasa, Istanbul, Turkey
| | - Hüseyin Yetik
- Department of Ophthalmology, Cerrahpasa Medical Faculty, Istanbul University- Cerrahpasa, Istanbul, Turkey
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Zhao Q, Gao S, Chen X, Zhu X. POC1A, prognostic biomarker of immunosuppressive microenvironment in cancer. Aging (Albany NY) 2022; 14:5195-5210. [PMID: 35748773 PMCID: PMC9271305 DOI: 10.18632/aging.204141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2022] [Accepted: 06/14/2022] [Indexed: 11/25/2022]
Abstract
POC1 centriolar protein A (POC1A) effect in pan-cancer remains uncertain. The POC1A expression in normal and tumor tissues underwent analysis in this study utilizing data from the Genotype-Tissue Expression (GTEx) project and the Cancer Genome Atlas (TCGA) database. POC1A prognostic value and clinicopathological features were assessed utilizing the TCGA cohort. The relationship between immunological cell infiltration and POC1A of TCGA samples downloaded from TIMER2 and ImmuCellAI databases were observed. The relation between POC1A and immunological checkpoints genes, microsatellite instability (MSI) as well as tumor mutation burden (TMB) was also evaluated. Additionally, gene set enrichment analysis (GSEA) was utilized for exploring POC1A potential molecular mechanism in pan-cancer. In almost all 33 tumors, POCA1 showed a high expression. In most cases, high POC1A expression was linked significantly with a poor prognosis. Additionally, Tumor immune infiltration and tumors microenvironment were correlated with the expression of POC1A. In addition, TMB and MSI, as well as immune checkpoint genes in pan-cancer, were related to POC1A expression. In GSEA analysis, POC1A is implicated in cell cycle and immune-related pathways. These results might elucidate the crucial roles of POC1A in pan-cancer as a prognostic biomarker and immunotherapy target.
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Affiliation(s)
- Qi Zhao
- Department of Thoracic Surgery, The Fourth Hospital of Hebei Medical University, Shijiazhuang 050011, China
| | - Shuping Gao
- Department of Pharmacy, The Fourth Hospital of Hebei Medical University, Shijiazhuang 050011, China
| | - Xin Chen
- Department of Thoracic Surgery, The Fourth Hospital of Hebei Medical University, Shijiazhuang 050011, China
| | - Xiyan Zhu
- Department of Thoracic Surgery, The Fourth Hospital of Hebei Medical University, Shijiazhuang 050011, China
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Mericq V, Huang-Doran I, Al-Naqeb D, Basaure J, Castiglioni C, de Bruin C, Hendriks Y, Bertini E, Alkuraya FS, Losekoot M, Al-Rubeaan K, Semple RK, Wit JM. Biallelic POC1A variants cause syndromic severe insulin resistance with muscle cramps. Eur J Endocrinol 2022; 186:543-552. [PMID: 35234134 PMCID: PMC9010808 DOI: 10.1530/eje-21-0609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Accepted: 03/01/2022] [Indexed: 11/08/2022]
Abstract
OBJECTIVE To describe clinical, laboratory, and genetic characteristics of three unrelated cases from Chile, Portugal, and Saudi Arabia with severe insulin resistance, SOFT syndrome, and biallelic pathogenic POC1A variants. DESIGN Observational study. METHODS Probands' phenotypes, including short stature, dysmorphism, and insulin resistance, were compared with previous reports. RESULTS Cases 1 (female) and 3 (male) were homozygous for known pathogenic POC1A variants: c.649C>T, p.(Arg217Trp) and c.241C>T, p.(Arg81*), respectively. Case 2 (male) was compound heterozygous for p.(Arg217Trp) variant and the rare missense variant c.370G>A, p.(Asp124Asn). All three cases exhibited severe insulin resistance, acanthosis nigricans, elevated serum triglycerides and decreased HDL, and fatty liver, resembling three previously reported cases. All three also reported severe muscle cramps. Aggregate analysis of the six known cases with biallelic POC1A variants and insulin resistance showed decreased birth weight and length mean (s.d.): -2.8 (0.9) and -3.7 (0.9) SDS, respectively), severe short stature mean (s.d.) height: -4.9 (1.7) SDS) and moderate microcephaly (mean occipitofrontal circumference -3.0 (range: -4.7 to -1.2)). These findings were similar to those reported for patients with SOFT syndrome without insulin resistance. Muscle biopsy in Case 3 showed features of muscle involvement secondary to a neuropathic process. CONCLUSIONS Patients with SOFT syndrome can develop severe dyslipidaemic insulin resistance, independent of the exonic position of the POC1A variant. They also can develop severe muscle cramps. After diagnosis, patients should be regularly screened for insulin resistance and muscle complaints.
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Affiliation(s)
- Veronica Mericq
- Institute of Maternal and Child Research, Faculty of Medicine, University of Chile, Santiago, Chile
- Department of Pediatrics, Clinica Las Condes, Santiago, Chile
- Correspondence should be addressed to V Mericq or R K Semple; or
| | - Isabel Huang-Doran
- University of Cambridge Metabolic Research Laboratories and NIHR Cambridge Biomedical Research Centre, Wellcome Trust-MRC Institute of Metabolic Science, Addenbrooke’s Hospital, Cambridge, UK
| | - Dhekra Al-Naqeb
- Department of Medicine, Medical Genetic Clinic, Sultan Bin Abdulaziz Humanitarian City, Riyadh, Saudi Arabia
| | | | | | - Christiaan de Bruin
- Division of Paediatric Endocrinology, Department of Paediatrics, Willem-Alexander Children’s Hospital, Leiden University Medical Center, Leiden, Netherlands
| | - Yvonne Hendriks
- Department of Clinical Genetics, Leiden University Medical Centre, Leiden, Netherlands
| | - Enrico Bertini
- Unit of Neuromuscular and Neurodegenerative Disorders, Genetics and Rare Diseases Research Division, Bambino Gesù Children’s Hospital, IRCCS, Rome, Italy
| | - Fowzan S Alkuraya
- Department of Translational Genomics, Centre for Genomic Medicine, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
| | - Monique Losekoot
- Department of Clinical Genetics, Leiden University Medical Centre, Leiden, Netherlands
| | - Khalid Al-Rubeaan
- Research and Scientific Centre Director, Sultan Bin Abdulaziz Humanitarian City, Riyadh, Saudi Arabia
| | - Robert K Semple
- Center for Cardiovascular Science, University of Edinburgh, Edinburgh, UK
- Correspondence should be addressed to V Mericq or R K Semple; or
| | - Jan M Wit
- Division of Paediatric Endocrinology, Department of Paediatrics, Willem-Alexander Children’s Hospital, Leiden University Medical Center, Leiden, Netherlands
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Li G, Chang G, Wang C, Yu T, Li N, Huang X, Wang X, Wang J, Wang J, Yao R. Identification of SOFT syndrome caused by a pathogenic homozygous splicing variant of POC1A: a case report. BMC Med Genomics 2021; 14:207. [PMID: 34419044 PMCID: PMC8379828 DOI: 10.1186/s12920-021-01055-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Accepted: 08/12/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Pathogenic variants in POC1A led to SOFT syndrome and variant POC1A-related (vPOC1A) syndrome. SOFT syndrome is a rare primordial dwarfism condition characterized by short stature, onychodysplasia, facial dysmorphism and hypotrichosis.The main clinical differences between SOFT and vPOC1A syndrome include dyslipidemia with insulin resistance and acanthosis nigricans. To our knowledge, this is the first report of a SOFT syndrome patient diagnosed with a homozygous splicing variant, which could help to extend our understanding of the genotypic and phenotypic information of the disease. CASE PRESENTATION We reported a seven-year-old boy with SOFT syndrome. The patient presented symmetrical short stature and facial features, including prominent forehead, inverted triangular face, epicanthal fold, small teeth and enlarged ears. Laboratory tests displayed mild insulin resistance. Whole-exome sequencing (WES) led to the identification of a homozygous splicing variant (c.981+1G>A) in POC1A gene of the patient, which was inherited from his heterozygous parents confirmed by Sanger sequencing. Further transcriptional experiments of the splicing variant revealed aberrant percentage of exon 9 skipping transcripts. CONCLUSIONS This is the firstly reported case of a SOFT syndrome patient with a novel homozygous splicing variant and detailed delineation of the aberrant transcript in proband and carrier of the variant in Chinese. Our study enriched mutational spectrum of POC1A which could help in further genetic diagnosis and counselling of SOFT syndrome patients.
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Affiliation(s)
- Guoqiang Li
- Department of Medical Genetics and Molecular Diagnostic Laboratory, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, People's Republic of China
| | - Guoying Chang
- Department of Endocrine and Metabolism, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, People's Republic of China
| | - Chen Wang
- Department of Medical Genetics and Molecular Diagnostic Laboratory, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, People's Republic of China
| | - Tingting Yu
- Department of Medical Genetics and Molecular Diagnostic Laboratory, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, People's Republic of China
| | - Niu Li
- Department of Medical Genetics and Molecular Diagnostic Laboratory, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, People's Republic of China
| | - Xiaodong Huang
- Department of Endocrine and Metabolism, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, People's Republic of China
| | - Xiumin Wang
- Department of Endocrine and Metabolism, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, People's Republic of China
| | - Jian Wang
- Department of Medical Genetics and Molecular Diagnostic Laboratory, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, People's Republic of China
| | - Jiwen Wang
- Department of Neurology, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, People's Republic of China.
| | - Ruen Yao
- Department of Medical Genetics and Molecular Diagnostic Laboratory, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, People's Republic of China.
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