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| ABSENCE OF EXPRESSION OF THE FMR-1 GENE IN FRAGILE-X SYNDROME |
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| Author(s): PIERETTI M, ZHANG FP, FU YH, WARREN ST, OOSTRA BA, CASKEY CT, NELSON DL |
| Source: CELL Volume: 66 Issue: 4 Pages: 817-822 Published: AUG 23 1991 |
| Times Cited: 718 References: 15 |
| Abstract: We previously reported the isolation of a gene (FMR-1) expressed in brain at the fragile X locus. One exon of this gene lies within an EcoRI fragment that exhibits length variation in fragile X patients. This exon also contains the CGG repeat within the CpG island hypermethylated in fragile X patients. To study the involvement of the FMR-1 gene in the fragile X syndrome, its expression was studied in lymphoblastoid cell lines and leukocytes derived from patients and normal controls. FMR-1 mRNA was absent in the majority of male fragile X patients, suggesting a close involvement of this gene in development of the syndrome. Normal individuals and carriers all show expression. The methylation status of the BssHII site at the CpG island was also studied by Southern blot analysis of DNA from patients, carriers, and controls. The minority of fragile X affected males that show expression of FMR-1 demonstrated an associated incomplete methylation of the BssHII site. |
| Document Type: Article |
| Language: English |
| Reprint Address: PIERETTI, M (reprint author), BAYLOR COLL MED, HOWARD HUGHES MED INST, HUMAN GENOME CTR, INST MOLEC GENET, HOUSTON, TX 77030 USA |
Addresses:
1. ERASMUS UNIV, DEPT CELL BIOL, 3000 DR ROTTERDAM, NETHERLANDS
2. EMORY UNIV, SCH MED, DEPT BIOCHEM, ATLANTA, GA 30322 USA
3. EMORY UNIV, SCH MED, DEPT PEDIAT, ATLANTA, GA 30322 USA |
| Publisher: CELL PRESS, 1050 MASSACHUSETTES AVE, CIRCULATION DEPT, CAMBRIDGE, MA 02138 |
| Subject Category: Biochemistry & Molecular Biology; Cell Biology |
| IDS Number: GC745 |
| ISSN: 0092-8674 |
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