Abstract
A previously identified complex mutation, affecting exon 28 of the neurofibromatosis type 1 gene, was employed for the analysis of the expression pattern in primary cultures of neurofibroma cells and melanocytes from a café-au-lait macule of the patient, respectively. Reverse transcription and subsequent polymerase chain reaction amplification of the segment carrying the mutation revealed that both alleles were expressed in both cell types analysed, thus excluding loss of heterozygosity in this particular instance. Segregation of the alleles of the intragenic Alu sequence length-polymorphism disclosed the paternal orgin of the mutated allele. Detection of this mutation was also used for presymptomatic direct DNA diagnosis in the younger child of the patient.
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Ballester R, Marchuk D, Boguski M, Saulino A, Letcher R, Wigler M, Collins F (1990) The NF1 locus encodes a protein functionally related to mammalian GAP and yeast IRA proteins Cell 63:851–859
Cawthon RM, Weiss R, Xu G, Viskochil D, Culver M, Stevens J, Robertson M, Dunn D, Gesteland R, O'Connell P, White R (1990) A major segment of the neurofibromatosis type 1 gene: cDNA sequence, genomic structure, and point mutations. Cell 62:193–201
Comings D (1973) A general theory of carcinogenesis. Proc Natl Acad Sci (USA) 70:3324–3328
DeClue JE, Papageorge AG, Fletcher JA, Diehl SR, Ratner N, Vass WC, Lowy DR (1992) Abnormal regulation of mammalian p21ras contributes to malignant tumor growth in von Recklinghausen (type 1) neurofibromatosis. Cell 69:265–273
Easton DF, Ponder MA, Huson SM, Ponder BAJ (1992) An analysis of variation in expression of neurofibromatosis type 1:evidence for modifying genes. Am J Hum Genet (submitted)
Halaban R, Gosh S, Duray P, Kirkwood JM, Lerner AB (1986) Human melanocytes cultured from nevi and melanomas. JInvest Dermatol 87:95–101
Innis MA, Gelfand DH, Sninsky JJ, White TJ (eds) (1990) PCR-rotocols: a guide to methods and applications. Academic Press. New York London
Jadayel D, Fain P, Upadhyaya M, Ponder MA, Huson SM, Carey J, Fryer A, Mathew CGP, Barker DF, Ponder BAJ (1990) Paternal origin of new mutations in von Recklinghausen neurofibromatosis. Nature 343:558–559
Kaufmann D, Krone W, Hochsattel R, Martin R (1989) A cell culture study on melanocytes from patients with neurofibromatosis 1. Arch Dermatol Res 281:510–513
Kaufmann D, Wiandt S, Veser J, Krone W (1991) Increased melanogenesis in cultured epidermal melanocytes from patients with neurofibromatosis 1 (NF1). Hum Genet 87:144–150
Keen J, Lester D, Inglehearn C, Curtis A, Bhattacharya S (1991) Rapid detection of single base mismatches as heteroduplexes on hydrolink gels. Trends Genet 7:5
Knudson AG jr (1971) Mutation and cancer: statistical study of retinoblastoma. Proc Natl Acad Sci USA 68:820–823
Lazaro C, Ravella A, Casals T, Volpini V, Estivill X (1992) Prenatal diagnosis of sporadic neurofibromatosis 1. Lancet 339:119–120
Martin GA, Viskochil D, Bollag G, McCabe PC, Crosier WJ, Haubruck H, Conroy L, Clark R, O'Conell P, Cawthon RM, Innis MA, McCormick F (1990) The GAP-related domain of the neurofibromatosis type 1 gene product interacts with ras p21. Cell 63:843–849
Martuza RL, Philippe I, Fitzpatrick TB, Zwaan J, Keki Y, Lederman J (1985) Melanin macroglobules as a cellular marker of neurofibromatosis: a quantitative study. J Invest Dermatol 85:347–350
Menon AG, Anderson KM, Riccardi VM, Chung RY, Whaley JM, Yandell DW, Farmer GE, Freimann RN, Lee JK, Li FP, Barker DF, Ledbetter DH, Kleider A, Martuza RL, Gusella JF, Scizinger BR (1990) Chromosome 17p deletions and p53 gene mutations associated with the formation of malignant neurofibrosarcomas in von Recklinghausen neurofibromatosis. Proc Natl Acad Sci USA 87:5435–5439
Merril CR, Goldman D, Sedman SA (1981) Ultrasensitive stain for proteins in poylacrylamid gel shows regional variation in cerebrospinal fluid proteins. Science 211:1437–1438
Miller GA, Dykes DD, Polesky JF (1988) A simple salting out procedure for extracting DNA from human nucleated cells. Nucleic Acids Res 16:1215
Ohno S (1971) Genetic implication of karyological instability of malignant somatic cells. Physiol Rev 51:496–526
Riccardi VM (1979) Cell-cell interaction as on epigenetic determinant in the expression of mutant neural crest cells. Birth Defects 15:89–98
Skuse GR, Kosciolek BA, Rowley PT (1989) Molecular genetic analysis of tumors in von Recklinghausen neurofibromatosis: loss of heterozygosity for chromosome 17. Genes Chromos Cancer 1:36–41
Stark M, Assum G, Krone W (1991) A small deletion and an adjacent base exchange in a potential stem-loop region of the neurofibromatosis 1 gene. Hum Genet 87:685–687
Stephens K, Kayes L, Riccardi VM, Rising M, Sybert PV, Pagon RA (1992) Preferential mutation of the neurofibromatosis type 1 gene in paternally derived chromosomes. Hum Genet 88:279–282
Wallace MR, Collins FS (1991) Molecular genetics of von Recklinghausen neurofibromatosis. Hum Genet 20:267–307
Wallace MR, Anderson LB, Saulino AM, Gregory PE, Glover TW, Collins FS (1991) A de novo Alu insertion results in neurofibromatosis type 1. Nature 353:864–866
Ward K, O'Connel P, Carey JC, Leppert M, Jolley S, Plaetke R, Ogden B, White R (1990) Diagnosis of neurofibromatosis 1 by using tightly linked, flanking DNA markers. Am J Hum Genet 46:943–949
Xu G, Nelson L, O'Connell P, White R (1991) An Alu polymorphism intragenic to the neurofibromatosis type 1 gene (NF1). Nucleic Acids Res 19:13
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This paper is dedicated with deep respect to Ulrich Wolf on his 60th birthday on 2 January 1993
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Stark, M., Assum, G., Kaufmann, D. et al. Analysis of segregation and expression of an identified mutation at the neuroflbromatosis type 1 locus. Hum Genet 90, 356–359 (1992). https://doi.org/10.1007/BF00220458
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DOI: https://doi.org/10.1007/BF00220458