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. 1982 Feb;19(1):44–48. doi: 10.1136/jmg.19.1.44

Fragile (X)(q27) sites in a pedigree with female carriers showing mild to severe mental retardation.

G C Webb, J L Halliday, D B Pitt, C G Judge, M Leversha
PMCID: PMC1048818  PMID: 7069746

Abstract

A pedigree showing the fragile site at Xq27 in a severely retarded female and in other less retarded carriers is described. Two of the four moderately retarded males with the fra(X)(q27) show macro-orchidism, and a variety of other features usually used to support the effects of the fra(X)(q27) are also inconsistent. A second fragile site at (10)(q23) is also present and in the two oldest females its frequency is not decreased, whereas the fra(x)(q27) is not detectable in these females although probably present. It is concluded that pedigrees showing mentally retarded females and probable X linkage should be included in studies of the fra(X)(q27).

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Selected References

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  1. Bowen P., Biederman B., Swallow K. A. The X-linked syndrome of macroorchidism and mental retardation: further observations. Am J Med Genet. 1978;2(4):409–414. doi: 10.1002/ajmg.1320020410. [DOI] [PubMed] [Google Scholar]
  2. Cantú J. M., Scaglia H. E., Medina M., González-Diddi M., Morato T., Moreno M. E., Pérez-Palacios G. Inherited congenital normofunctional testicular hyperplasia and mental deficiency. Hum Genet. 1976 Jul 7;33(1):23–33. doi: 10.1007/BF00447283. [DOI] [PubMed] [Google Scholar]
  3. Gerald P. S. X-linked mental retardation and an X-chromosome marker. N Engl J Med. 1980 Sep 18;303(12):696–697. doi: 10.1056/NEJM198009183031209. [DOI] [PubMed] [Google Scholar]
  4. Harvey J., Judge C., Wiener S. Familial X-linked mental retardation with an X chromosome abnormality. J Med Genet. 1977 Feb;14(1):46–50. doi: 10.1136/jmg.14.1.46. [DOI] [PMC free article] [PubMed] [Google Scholar]
  5. Hecht F., Kaiser-McCaw B. The importance of being a fragile site. Am J Hum Genet. 1979 Mar;31(2):223–225. [PMC free article] [PubMed] [Google Scholar]
  6. Howard-Peebles P. N., Stoddard G. R. X-linked mental retardation with macro-orchidism and marker X chromosomes. Hum Genet. 1979 Sep;50(3):247–251. doi: 10.1007/BF00399389. [DOI] [PubMed] [Google Scholar]
  7. Jacobs P. A., Mayer M., Rudak E., Gerrard J., Ives E. J., Shokeir M. H., Hall J., Jennings M., Hoehn H. More on marker X chromosomes, mental retardation and macro-orchidism. N Engl J Med. 1979 Mar 29;300(13):737–738. doi: 10.1056/nejm197903293001320. [DOI] [PubMed] [Google Scholar]
  8. Leversha M. A., Webb G. C., Pavey S. M. Chromosome banding required for studies on X-linked mental retardation. Lancet. 1981 Jan 3;1(8210):49–49. doi: 10.1016/s0140-6736(81)90160-4. [DOI] [PubMed] [Google Scholar]
  9. Sutherland G. R., Ashforth P. L. X-linked mental retardation with macro-orchidism and the fragile site at Xq 27 or 28. Hum Genet. 1979 Apr 17;48(1):117–120. doi: 10.1007/BF00273283. [DOI] [PubMed] [Google Scholar]
  10. Sutherland G. R. Heritable fragile sites on human chromosomes I. Factors affecting expression in lymphocyte culture. Am J Hum Genet. 1979 Mar;31(2):125–135. [PMC free article] [PubMed] [Google Scholar]
  11. Sutherland G. R., Judge C. G., Wiener S. Familial X-linked mental retardation with an X chromosome abnormality and macro-orchidism. J Med Genet. 1980 Feb;17(1):73–74. doi: 10.1136/jmg.17.1.73. [DOI] [PMC free article] [PubMed] [Google Scholar]
  12. Turner G., Brookwell R., Daniel A., Selikowitz M., Zilibowitz M. Heterozygous expression of X-linked mental retardation and X-chromosome marker fra(X)(q27). N Engl J Med. 1980 Sep 18;303(12):662–664. doi: 10.1056/NEJM198009183031202. [DOI] [PubMed] [Google Scholar]
  13. Turner G., Daniel A., Frost M. X-linked mental retardation, macro-orchidism, and the Xq27 fragile site. J Pediatr. 1980 May;96(5):837–841. doi: 10.1016/s0022-3476(80)80552-x. [DOI] [PubMed] [Google Scholar]
  14. Turner G., Eastman C., Casey J., McLeay A., Procopis P., Turner B. X-linked mental retardation associated with macro-orchidism. J Med Genet. 1975 Dec;12(4):367–371. doi: 10.1136/jmg.12.4.367. [DOI] [PMC free article] [PubMed] [Google Scholar]

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