Microdeletion syndrome
Microdeletion syndrome is a syndrome caused by a chromosomal deletion smaller than 5 million base pairs (5 Mb) spanning several genes that is too small to be detected by conventional cytogenetic methods or high resolution karyotyping (2-5 Mb).[1][2] Detection is done by fluorescence in situ hybridization (FISH). Larger chromosomal deletion syndromes are detectable using karyotyping techniques
Examples
- DiGeorge syndrome or velocardiofacial syndrome[3] - most common microdeletion syndrome
- Prader–Willi syndrome[4][5]
- Angelman syndrome[4]
- Neurofibromatosis type 1[6]
- Neurofibromatosis type II[7][8]
- Williams syndrome[9]
- Miller–Dieker syndrome[10]
- Smith–Magenis syndrome[11]
- Rubinstein–Taybi syndrome[12]
- Wolf–Hirschhorn syndrome[13]
Management
No cure is available for these genetically inherited disorders. Genetic counseling is required.
References
- ^ H. William Taeusch; Roberta A. Ballard; Christine A. Gleason; Mary Ellen Avery (2005). Avery's Diseases of the Newborn. Elsevier Health Sciences. pp. 210–215. ISBN 0-7216-9347-4.
- ^ "Microdeletion syndrome". Genetics Home Reference. April 17, 2014. Retrieved 19 April 2014.
- ^ Shaikh, TH; Kurahashi, H; Saitta, SC; O'Hare, AM; Hu, P; Roe, BA; Driscoll, DA; McDonald-McGinn, DM; Zackai, EH; Budarf, ML; Emanuel, BS (1 March 2000). "Chromosome 22-specific low copy repeats and the 22q11.2 deletion syndrome: genomic organization and deletion endpoint analysis". Human Molecular Genetics. 9 (4): 489–501. doi:10.1093/hmg/9.4.489. PMID 10699172.
- ^ a b Buiting, K; Saitoh, S; Gross, S; Dittrich, B; Schwartz, S; Nicholls, RD; Horsthemke, B (April 1995). "Inherited microdeletions in the Angelman and Prader-Willi syndromes define an imprinting centre on human chromosome 15". Nature Genetics. 9 (4): 395–400. doi:10.1038/ng0495-395. PMID 7795645.
- ^ Runte, M; Varon, R; Horn, D; Horsthemke, B; Buiting, K (February 2005). "Exclusion of the C/D box snoRNA gene cluster HBII-52 from a major role in Prader-Willi syndrome". Human Genetics. 116 (3): 228–30. doi:10.1007/s00439-004-1219-2. PMID 15565282.
- ^ Pasmant, E; Sabbagh, A; Spurlock, G; Laurendeau, I; Grillo, E; Hamel, MJ; Martin, L; Barbarot, S; Leheup, B; Rodriguez, D; Lacombe, D; Dollfus, H; Pasquier, L; Isidor, B; Ferkal, S; Soulier, J; Sanson, M; Dieux-Coeslier, A; Bièche, I; Parfait, B; Vidaud, M; Wolkenstein, P; Upadhyaya, M; Vidaud, D; members of the NF France, Network (June 2010). "NF1 microdeletions in neurofibromatosis type 1: from genotype to phenotype". Human Mutation. 31 (6): E1506-18. doi:10.1002/humu.21271. PMID 20513137.
- ^ Rouleau, GA; Merel, P; Lutchman, M; Sanson, M; Zucman, J; Marineau, C; Hoang-Xuan, K; Demczuk, S; Desmaze, C; Plougastel, B (10 June 1993). "Alteration in a new gene encoding a putative membrane-organizing protein causes neuro-fibromatosis type 2". Nature. 363 (6429): 515–21. doi:10.1038/363515a0. PMID 8379998.
- ^ Beck, Megan; Peterson, Jess F.; McConnell, Juliann; McGuire, Marianne; Asato, Miya; Losee, Joseph E.; Surti, Urvashi; Madan-Khetarpal, Suneeta; Rajkovic, Aleksandar; Yatsenko, Svetlana A. (May 2015). "Craniofacial abnormalities and developmental delay in two families with overlapping 22q12.1 microdeletions involving the gene". American Journal of Medical Genetics Part A. 167 (5): 1047–1053. doi:10.1002/ajmg.a.36839.
- ^ Tassabehji, M; Metcalfe, K; Karmiloff-Smith, A; Carette, MJ; Grant, J; Dennis, N; Reardon, W; Splitt, M; Read, AP; Donnai, D (January 1999). "Williams syndrome: use of chromosomal microdeletions as a tool to dissect cognitive and physical phenotypes". American Journal of Human Genetics. 64 (1): 118–25. doi:10.1086/302214. PMID 9915950.
- ^ Huang, HC; Bautista, SL; Chen, BS; Chang, KP; Chen, YJ; Wuu, SW (1996). "Miller-Dieker syndrome with microdeletion of chromosome 17p13.3: report of one case". Zhonghua Minguo xiao er ke yi xue hui za zhi [Journal]. Zhonghua Minguo xiao er ke yi xue hui. 38 (6): 472–6. PMID 9473821.
- ^ Bi, W; Yan, J; Stankiewicz, P; Park, SS; Walz, K; Boerkoel, CF; Potocki, L; Shaffer, LG; Devriendt, K; Nowaczyk, MJ; Inoue, K; Lupski, JR (May 2002). "Genes in a refined Smith-Magenis syndrome critical deletion interval on chromosome 17p11.2 and the syntenic region of the mouse". Genome Research. 12 (5): 713–28. doi:10.1101/gr.73702. PMC 186594. PMID 11997338.
- ^ Wójcik, C; Volz, K; Ranola, M; Kitch, K; Karim, T; O'Neil, J; Smith, J; Torres-Martinez, W (February 2010). "Rubinstein-Taybi syndrome associated with Chiari type I malformation caused by a large 16p13.3 microdeletion: a contiguous gene syndrome?". American Journal of Medical Genetics Part A. 152A (2): 479–83. doi:10.1002/ajmg.a.33303. PMID 20101707.
- ^ Rauch, A; Schellmoser, S; Kraus, C; Dörr, HG; Trautmann, U; Altherr, MR; Pfeiffer, RA; Reis, A (1 April 2001). "First known microdeletion within the Wolf-Hirschhorn syndrome critical region refines genotype-phenotype correlation". American Journal of Medical Genetics. 99 (4): 338–42. doi:10.1002/ajmg.1203. PMID 11252005.
Further reading
- H. William Taeusch; Roberta A. Ballard; Christine A. Gleason; Mary Ellen Avery (2005). Avery's Diseases of the Newborn. Elsevier Health Sciences. pp. 210–215. ISBN 0-7216-9347-4.
- Microdeletions and Molecular Genetics
- Microdeletion syndromes (chromosomes 1 to 11) on UpToDate
- List of 100 microdeletion/duplication syndromes detected by array-CGH on GENOMA
- Schwartz, Stuart; Graf, Michael D. (Sep 13, 2002). "Ch 19. Microdeletion Syndromes: Characteristics and Diagnosis". Molecular Cytogenetics : Protocols and Applications. Methods in Molecular Biology. Vol. 204. pp. 275–290. doi:10.1385/1-59259-300-3:275.
- Vissers, LE; Stankiewicz, P (2012). "Microdeletion and microduplication syndromes". Methods in molecular biology (Clifton, N.J.). 838: 29–75. doi:10.1007/978-1-61779-507-7_2. PMID 22228006.
- Slavotinek, Anne. Microdeletion Syndromes. doi:10.1002/9780470015902.a0005549.pub2.
- 13 chromosomal disorders you may not have heard of