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American Journal of Human Genetics logoLink to American Journal of Human Genetics
. 1994 Jan;54(1):95–103.

Refining the locus for Best vitelliform macular dystrophy and mutation analysis of the candidate gene ROM1.

B E Nichols 1, R Bascom 1, M Litt 1, R McInnes 1, V C Sheffield 1, E M Stone 1
PMCID: PMC1918069  PMID: 8279475

Abstract

Vitelliform macular dystrophy (Best disease) is an autosomal dominant macular dystrophy which shares important clinical features with age-related macular degeneration, the most common cause of legal blindness in the elderly. Unfortunately, our understanding and treatment for this common age-related disorder is limited. Discovery of the gene which causes Best disease has the potential to increase our understanding of the pathogenesis of all types of macular degeneration, including the common age-related form. Best disease has recently been mapped to chromosome 11q13. The photoreceptor-specific protein ROM1 has also been recently mapped to this location, and the ROM1 gene is a candidate gene for Best disease. Using highly polymorphic markers, we have narrowed the genetic region which contains the Best disease gene to the 10-cM region between markers D11S871 and PYGM. Marker D11S956 demonstrated no recombinants with Best disease in three large families and resulted in a lod score of 18.2. In addition, a polymorphism within the ROM1 gene also demonstrated no recombinants and resulted in a lod score of 10.0 in these same three families. We used a combination of SSCP analysis, denaturing gradient gel electrophoresis, and DNA sequencing to screen the entire coding region of the ROM1 gene in 11 different unrelated patients affected with Best disease. No nucleotide changes were found in the coding sequence of any affected patient, indicating that mutations within the coding sequence are unlikely to cause Best disease.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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