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Updated: Jun 2, 2026
12:37
Pharmacologic Induction of Epidermal Melanin and Protection Against Sunburn in a Humanized Mouse Model
Published on: September 7, 2013
Chromosomal assignment of three human melanocyte-specific genes
1UNIV PITTSBURGH,DEPT PATHOL,PITTSBURGH,PA 15213. STANFORD UNIV,SCH MED,HOWARD HUGHES MED INST,STANFORD,CA 94305. STANFORD UNIV,SCH MED,DEPT GENET,STANFORD,CA 94305. STANFORD UNIV,SCH MED,DEPT PEDIAT,STANFORD,CA 94305.
International Journal of Oncology
|May 5, 2011
Summary
Researchers identified genes in normal melanocytes that are absent in malignant melanomas. One gene on chromosome 3p14 is expressed in healthy melanocytes but not in melanoma cells, offering potential diagnostic markers.
Area of Science:
- Genetics
- Oncology
- Molecular Biology
Background:
- Melanoma is a serious form of skin cancer.
- Identifying genes specific to normal melanocytes could reveal melanoma's molecular underpinnings.
Purpose of the Study:
- To find genes expressed in normal human melanocytes but not in malignant melanomas.
- To determine the chromosomal locations of these candidate genes.
Main Methods:
- Subtractive cDNA hybridization and PCR amplification were used to isolate melanocyte-enriched cDNAs.
- Genomic clones were isolated, and chromosomal locations were mapped using fluorescent in situ hybridization.
- RNase A protection and in situ hybridization confirmed gene expression patterns.
Main Results:
- Three human melanocyte-enriched partial cDNA clones were isolated.
- The corresponding genes were mapped to chromosomes 3p14, 19q13.1, and 2p16-14.
- The gene on chromosome 3p14 was confirmed to be expressed in normal melanocytes but absent in malignant melanomas.
Conclusions:
- A gene located on chromosome 3p14 is specifically expressed in normal melanocytes and not in melanomas.
- This gene represents a potential marker for distinguishing normal melanocytes from melanoma cells.
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