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Jiang Y, Tang S, He F, Yuan JX, Zhang Z. New mechanism of partial duplication and deletion of chromosome 8: A case report. World J Clin Cases 2021; 9:7139-7145. [PMID: 34540970 PMCID: PMC8409188 DOI: 10.12998/wjcc.v9.i24.7139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2021] [Revised: 05/23/2021] [Accepted: 06/07/2021] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND During meiosis, the recombination of homologous chromosomes produces some new heritable mutations, which are the basis of biological evolution and diversity. However, when there is pericentric inversion of chromosomes, unbalanced gametes will be formed in the process of germ cell meiosis.
CASE SUMMARY A 23-year-old pregnant woman at 25 wk of gestation wanted to terminate her pregnancy due to fetal chromosomal abnormalities. She had no exposure to toxic or hazardous substances before and during pregnancy, no history of medication usage during pregnancy, and she underwent cystectomy of ovarian cysts in 2017. On the second day of the 16th week of gestation, non-invasive prenatal testing showed chromosome 8 copy number variation. Following genetic counseling, her pregnancy was terminated.
CONCLUSION Recombinant offspring chromosome is rarely seen when the inversion segment is shorter than one-third of the chromosome length. In terms of the mechanism of chromosome 8 duplication/deletion occurrence, attention should be paid to the production of unbalanced gametes by the pairing of homologous chromosome during meiosis, and the possibility of mitotic recombination exchange as well.
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Affiliation(s)
- Yan Jiang
- Office of Prenatal Diagnosis, Mianyang People’s Hospital, Mianyang 621000, Sichuan Province, China
| | - Shuang Tang
- Office of Prenatal Diagnosis, Mianyang People’s Hospital, Mianyang 621000, Sichuan Province, China
| | - Fang He
- Department of Obstetrics, Mianyang People’s Hospital, Mianyang 621000, Sichuan Province, China
| | - Jue-Xin Yuan
- Office of Prenatal Diagnosis, Mianyang People’s Hospital, Mianyang 621000, Sichuan Province, China
| | - Zhu Zhang
- Office of Prenatal Diagnosis, West China Second University Hospital, Sichuan University, Chengdu 610000, Sichuan Province, China
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Lo Bianco M, Vecchio D, Timpanaro TA, Arena A, Macchiaiolo M, Bartuli A, Sciuto L, Presti S, Sciuto S, Sapuppo A, Fiumara A, Marino L, Messina G, Pavone P. Deciphering the Invdupdel(8p) Genotype-Phenotype Correlation: Our Opinion. Brain Sci 2020; 10:brainsci10070451. [PMID: 32679641 PMCID: PMC7408450 DOI: 10.3390/brainsci10070451] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 07/05/2020] [Accepted: 07/10/2020] [Indexed: 01/30/2023] Open
Abstract
The 8p inverted duplication/deletion is a rare chromosomal rearrangement clinically featuring neurodevelopmental delay, mild to severe cognitive impairment, heart congenital defects and brain abnormalities. Patients affected also present typical facial dysmorphisms and skeletal malformations, and it is thought that the composite clinical picture may fall into the chromosomal rearrangement architecture. With the major aim of better framing its related clinical and diagnostic paths, we describe a patient carrying a de novo invdupde[8p] whose clinical features have not been described so far. Hence, through an extensive genotype-phenotype correlation analysis and by reviewing the dedicated scientific literature, we compared our patient's features with those reported in other patients, which allows us to place our proband's expressiveness in an intermediate area, widening the scope of the already known invdupde[8p] genotype-phenotype relationship.
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Affiliation(s)
- Manuela Lo Bianco
- Postgraduate Training Program in Pediatrics, Department of Clinical and Experimental Medicine, University of Catania, 95100 Catania, Italy; (L.S.); (S.P.); (S.S.); (A.S.); (L.M.); (G.M.)
- Correspondence: (M.L.B.); (P.P.); Tel.: +39-3401841225 (M.L.B.); +39-0953781193 (P.P.)
| | - Davide Vecchio
- Rare Disease and Medical Genetics, Academic Department of Pediatrics, Bambino Gesù Children’s Hospital, 00146 Rome, Italy; (D.V.); (M.M.); (A.B.)
| | - Tiziana A. Timpanaro
- Department of Clinical and Experimental Medicine, University of Catania, 95100 Catania, Italy; (T.A.T.); (A.A.); (A.F.)
| | - Alessia Arena
- Department of Clinical and Experimental Medicine, University of Catania, 95100 Catania, Italy; (T.A.T.); (A.A.); (A.F.)
| | - Marina Macchiaiolo
- Rare Disease and Medical Genetics, Academic Department of Pediatrics, Bambino Gesù Children’s Hospital, 00146 Rome, Italy; (D.V.); (M.M.); (A.B.)
| | - Andrea Bartuli
- Rare Disease and Medical Genetics, Academic Department of Pediatrics, Bambino Gesù Children’s Hospital, 00146 Rome, Italy; (D.V.); (M.M.); (A.B.)
| | - Laura Sciuto
- Postgraduate Training Program in Pediatrics, Department of Clinical and Experimental Medicine, University of Catania, 95100 Catania, Italy; (L.S.); (S.P.); (S.S.); (A.S.); (L.M.); (G.M.)
| | - Santiago Presti
- Postgraduate Training Program in Pediatrics, Department of Clinical and Experimental Medicine, University of Catania, 95100 Catania, Italy; (L.S.); (S.P.); (S.S.); (A.S.); (L.M.); (G.M.)
| | - Sarah Sciuto
- Postgraduate Training Program in Pediatrics, Department of Clinical and Experimental Medicine, University of Catania, 95100 Catania, Italy; (L.S.); (S.P.); (S.S.); (A.S.); (L.M.); (G.M.)
| | - Annamaria Sapuppo
- Postgraduate Training Program in Pediatrics, Department of Clinical and Experimental Medicine, University of Catania, 95100 Catania, Italy; (L.S.); (S.P.); (S.S.); (A.S.); (L.M.); (G.M.)
| | - Agata Fiumara
- Department of Clinical and Experimental Medicine, University of Catania, 95100 Catania, Italy; (T.A.T.); (A.A.); (A.F.)
| | - Lidia Marino
- Postgraduate Training Program in Pediatrics, Department of Clinical and Experimental Medicine, University of Catania, 95100 Catania, Italy; (L.S.); (S.P.); (S.S.); (A.S.); (L.M.); (G.M.)
| | - Giulia Messina
- Postgraduate Training Program in Pediatrics, Department of Clinical and Experimental Medicine, University of Catania, 95100 Catania, Italy; (L.S.); (S.P.); (S.S.); (A.S.); (L.M.); (G.M.)
| | - Piero Pavone
- Department of Clinical and Experimental Medicine, University of Catania, 95100 Catania, Italy; (T.A.T.); (A.A.); (A.F.)
- Correspondence: (M.L.B.); (P.P.); Tel.: +39-3401841225 (M.L.B.); +39-0953781193 (P.P.)
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3
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Gug C, Stoicanescu D, Mozos I, Nussbaum L, Cevei M, Stambouli D, Pavel AG, Doros G. De novo 8p21.3→ p23.3 Duplication With t(4;8)(q35;p21.3) Translocation Associated With Mental Retardation, Autism Spectrum Disorder, and Congenital Heart Defects: Case Report With Literature Review. Front Pediatr 2020; 8:375. [PMID: 32733829 PMCID: PMC7362762 DOI: 10.3389/fped.2020.00375] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Accepted: 06/03/2020] [Indexed: 12/29/2022] Open
Abstract
Duplications of chromosome 8p lead to rare genetic conditions characterized by variable phenotypes. 8p21 and 8p23 duplications were associated with mental retardation but only 8p23 duplication was associated with heart defects. 8p22→ p21.3 duplications were associated with an autism spectrum disorder in several cases. We present a rare case with a de novo duplication of the entire 8p21.3→ p23.3 region, documented by karyotype, FISH, and array CGH, with t(4;8)(q35;p21.3) translocation in a 7 years-old girl. She was referred for genetic counseling at the age of 20 months due to mild dysmorphic facial features, psychomotor retardation, and a noncyanotic heart defect. Another examination carried out at the age of 5 years, enabled the diagnosis of autism spectrum disorder and attention deficit hyperactivity disorder. Upon re-examination after two years she was diagnosed with autism spectrum disorder, attention deficit hyperactivity disorder, liminal intellect with cognitive disharmony, delay in psychomotor acquisitions, developmental language delay, an instrumental disorder, and motor coordination disorder. Cytogenetic analysis using GTG technique revealed the following karyotype: 46,XX,der(4),t(4;8)(q35;p21.3). The translocation of the duplicated 8pter region to the telomeric region 4q was confirmed by FISH analysis (DJ580L5 probe). Array CGH showed: arr[GRCh37]8p23.3p21.3(125733_22400607) × 3. It identified a terminal duplication, a 22.3 Mb copy number gain of chromosome 8p23.3-p21.3, between 125,733 and 22,400,607. In this case, there is a de novo duplication of a large chromosomal segment, which was translocated to chromosome 4q. Our report provides additional data regarding neuropsychiatric features in chromosome 8p duplication. The phenotypic consequences in our patient allow clinical-cytogenetic correlations and may also reveal candidate genes for the phenotypic features.
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Affiliation(s)
- Cristina Gug
- Department of Microscopic Morphology, Victor Babes University of Medicine and Pharmacy, Timisoara, Romania
| | - Dorina Stoicanescu
- Department of Microscopic Morphology, Victor Babes University of Medicine and Pharmacy, Timisoara, Romania
| | - Ioana Mozos
- Department of Functional Sciences, Victor Babes University of Medicine and Pharmacy, Timisoara, Romania
- Center for Translational Research and Systems Medicine, Victor Babes University of Medicine and Pharmacy, Timisoara, Romania
| | - Laura Nussbaum
- Department of Neurosciences, Victor Babes University of Medicine and Pharmacy, Timisoara, Romania
| | - Mariana Cevei
- Department of Psychoneuro Sciences and Rehabilitation, Faculty of Medicine and Pharmacy, University of Oradea, Oradea, Romania
| | - Danae Stambouli
- Department of Molecular Genetics and Cytogenetics, Cytogenomic Medical Laboratory, Bucharest, Romania
| | - Anca Gabriela Pavel
- Department of Molecular Genetics and Cytogenetics, Cytogenomic Medical Laboratory, Bucharest, Romania
| | - Gabriela Doros
- Department of Pediatrics, Victor Babes University of Medicine and Pharmacy, Timisoara, Romania
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Sánchez-Casillas AL, Rivera H, Castro-Martínez AG, García-Ortiz JE, Córdova-Fletes C, Mendoza-Pérez P. De Novo San Luis Valley Syndrome-like der(8) Chromosome With a Concomitant dup(8p22) in a Mexican Girl. Ann Lab Med 2017; 37:88-91. [PMID: 27834075 PMCID: PMC5107627 DOI: 10.3343/alm.2017.37.1.88] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Revised: 07/01/2016] [Accepted: 08/29/2016] [Indexed: 01/30/2023] Open
Affiliation(s)
- Alma Laura Sánchez-Casillas
- Centro de Investigación Biomédica de Occidente, Instituto Mexicano del Seguro Social, Guadalajara, Jal., México
| | - Horacio Rivera
- Centro de Investigación Biomédica de Occidente, Instituto Mexicano del Seguro Social, Guadalajara, Jal., México.,Biología Molecular y Genómica, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara, Jal., México
| | | | - José Elías García-Ortiz
- Centro de Investigación Biomédica de Occidente, Instituto Mexicano del Seguro Social, Guadalajara, Jal., México
| | - Carlos Córdova-Fletes
- Laboratorio de Citogenómica y Microarreglos, Departamento de Bioquímica y Medicina Molecular, Facultad de Medicina, Universidad Autónoma de Nuevo León, Monterrey, N.L., México.
| | - Paul Mendoza-Pérez
- Laboratorio de Citogenómica y Microarreglos, Departamento de Bioquímica y Medicina Molecular, Facultad de Medicina, Universidad Autónoma de Nuevo León, Monterrey, N.L., México
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Pope K, Samanich J, Ramesh KH, Cannizzaro L, Pan Q, Babcock M. Dextrocardia, atrial septal defect, severe developmental delay, facial anomalies, and supernumerary ribs in a child with a complex unbalanced 8;22 translocation including partial 8p duplication. Am J Med Genet A 2012; 158A:641-7. [PMID: 22302699 DOI: 10.1002/ajmg.a.34431] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2011] [Accepted: 10/30/2011] [Indexed: 01/22/2023]
Abstract
We report on a child with dextrocardia, atrial septal defect (ASD), severe developmental delay, hypotonia, 13 pairs of ribs, left preauricular choristoma, hirsutism, and craniofacial abnormalities. Prenatal cytogenetic evaluation showed karyotype 46,XY,?dup(8p)ish del(8)pter. Postnatal array CGH demonstrated a 6.8 Mb terminal deletion at 8p23.3-p23, an interstitial 31.1 Mb duplication within 8p23.1-p11, and a terminal duplication of 0.24 Mb at 22q13.33, refining the karyotype to 46,XY,der(8)dup(8)(p23.1p11.1)t(8;22)(p23.1;q13.1).ish der(8)dup(8)(p23.1p11.1)t(8;22)(p23.1;q13.1) (D8S504-,MS607 + ,ARSA + ,D8Z1 + , RP115713 + +). Previous reports of distal 8p deletion, 8p duplication, and distal 22q duplication have shown similar manifestations, including congenital heart disease, intellectual impairment, and multiple minor anomalies. We correlate the patient's clinical findings with these particular areas of copy number. This case study supports the use of aCGH to identify subtle chromosomal rearrangement in infants with cardiac malformation as their most significant or only apparent birth defect. Additionally, it illustrates why aCGH is essential in the description of chromosome rearrangements, even those seemingly visible via routine karyotype. This method shows that there is often greater complexity submicroscopically, essential to an adequate understanding of a patient's genotype and phenotype.
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Affiliation(s)
- Kathleen Pope
- Department of Pediatrics, Montefiore Medical Center, Bronx, New York 10467, USA
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Tirado CA, Gotway G, Torgbe E, Iyer S, Dallaire S, Appleberry T, Suterwala M, Garcia R, Valdez F, Patel S, Koduru P. Recombinant chromosome 7 in a mosaic 45,X/47,XXX patient. Am J Med Genet A 2011; 158A:206-14. [PMID: 22106088 DOI: 10.1002/ajmg.a.34364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2010] [Accepted: 10/02/2011] [Indexed: 11/12/2022]
Abstract
Individuals with pericentric inversions are at risk for producing offspring with chromosomal gains and losses, while those carrying paracentric inversions usually produce unviable gametes [Madan, 1995]. In this current study, we present a newborn with dysmorphic features and malformations, whose karyotype showed an abnormal copy of chromomosome 7 described at first as add(7)(q32) as well as mos 45,X/47,XXX. Array comparative genomic hybridization (CGH) revealed an interstitial deletion in the long arm of chromosome 7 involving bands q35 to q36.3 but retaining the 7q subtelomere. The patient's deletion is believed to be due to meiotic recombination in the inversion loop in the phenotypically normal father who seems to carry two paracentric inversions in the long arm of chromosome 7, which was described as rec(7)(7pter- > q35::q36.3- > 7qter)pat. The abnormal copy of chromosome 7 in the father has been described as: der(7)(7pter- > q22.1::q36.3- > q35::q22.1- > q35::q36.3- > 7qter). This is a unique karyotype that to our knowledge has not been previously reported in the literature and predisposes to meiotic recombination that can result in deletions or duplications of 7q35-36.
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Affiliation(s)
- Carlos A Tirado
- Laboratory of Clinical Cytogenetics, Department of Pathology, The University of Texas Southwestern Medical Center, Dallas, Texas, USA.
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8
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Hand M, Gray C, Glew G, Tsuchiya KD. Mild phenotype in a patient with mosaic del(8p)/inv dup del(8p). Am J Med Genet A 2010; 152A:2827-31. [DOI: 10.1002/ajmg.a.33669] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Genomic profile of copy number variants on the short arm of human chromosome 8. Eur J Hum Genet 2010; 18:1114-20. [PMID: 20461109 DOI: 10.1038/ejhg.2010.66] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
We evaluated 966 consecutive pediatric patients with various developmental disorders by high-resolution microarray-based comparative genomic hybridization and found 10 individuals with pathogenic copy number variants (CNVs) on the short arm of chromosome 8 (8p), representing approximately 1% of the patients analyzed. Two patients with 8p terminal deletion associated with interstitial inverted duplication (inv dup del(8p)) had different mechanisms leading to the formation of a dicentric intermediate during meiosis. Three probands carried an identical ∼5.0 Mb interstitial duplication of chromosome 8p23.1. Four possible hotspots within 8p were observed at nucleotide coordinates of ∼10.45, 24.32-24.82, 32.19-32.77, and 38.94-39.72 Mb involving the formation of recurrent genomic rearrangements. Other CNVs with deletion- or duplication-specific start or stop coordinates on the 8p provide useful information for exploring the basic mechanisms of complex structural rearrangements in the human genome.
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Ozgen HM, van Daalen E, Bolton PF, Maloney VK, Huang S, Cresswell L, van den Boogaard MJ, Eleveld MJ, van ‘t Slot R, Hochstenbach R, Beemer FA, Barrow M, Barber JCK, Poot M. Copy number changes of the microcephalin 1 gene (MCPH1) in patients with autism spectrum disorders. Clin Genet 2009; 76:348-56. [DOI: 10.1111/j.1399-0004.2009.01254.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Aktas D, Weise A, Utine E, Alehan D, Mrasek K, von Eggeling F, Thieme H, Tuncbilek E, Liehr T. Clinically abnormal case with paternally derived partial trisomy 8p23.3 to 8p12 including maternal isodisomy of 8p23.3: a case report. Mol Cytogenet 2009; 2:14. [PMID: 19566937 PMCID: PMC2715415 DOI: 10.1186/1755-8166-2-14] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2009] [Accepted: 06/30/2009] [Indexed: 01/30/2023] Open
Abstract
Background Because of low copy repeats (LCRs) and common inversion polymorphisms, the human chromosome 8p is prone to a number of recurrent rearrangements. Each of these rearrangements is associated with several phenotypic features. We report on a patient with various clinical malformations and developmental delay in connection with an inverted duplication event, involving chromosome 8p. Methods Chromosome analysis, multicolor banding analysis (MCB), extensive fluorescence in situ hybridization (FISH) analysis and microsatellite analysis were performed. Results The karyotype was characterized in detail by multicolor banding (MCB), subtelomeric and centromere-near probes as 46,XY,dup(8)(pter->p23.3::p12->p23.3::p23.3->qter). Additionally, microsatellite analysis revealed the paternal origin of the duplication and gave hints for a mitotic recombination involving about 6 MB in 8p23.3. Conclusion A comprehensive analysis of the derivative chromosome 8 suggested a previously unreported mechanism of formation, which included an early mitotic aberration leading to maternal isodisomy, followed by an inverted duplication of the 8p12p23.3 region.
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Affiliation(s)
- Dilek Aktas
- Hacettepe University Faculty of Medicine, Department of Genetics, 06100 Sihhiye, Ankara, Turkey.
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Hollox EJ, Barber JCK, Brookes AJ, Armour JAL. Defensins and the dynamic genome: what we can learn from structural variation at human chromosome band 8p23.1. Genome Res 2009; 18:1686-97. [PMID: 18974263 DOI: 10.1101/gr.080945.108] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Over the past four years, genome-wide studies have uncovered numerous examples of structural variation in the human genome. This includes structural variation that changes copy number, such as deletion and duplication, and structural variation that does not change copy number, such as orientation and positional polymorphism. One region that contains all these types of variation spans the chromosome band 8p23.1. This region has been studied in some depth, and the focus of this review is to examine our current understanding of the variation of this region. We also consider whether this region is a good model for other structurally variable regions in the genome and what the implications of this variation are for clinical studies. Finally, we discuss the bioinformatics challenges raised, discuss the evolution of the region, and suggest some future priorities for structural variation research.
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Affiliation(s)
- Edward J Hollox
- Department of Genetics, University of Leicester, Leicester LE1 7RH, United Kingdom.
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