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. 1995 Apr;69(4):2611–2616. doi: 10.1128/jvi.69.4.2611-2616.1995

Tax mutation associated with tropical spastic paraparesis/human T-cell leukemia virus type I-associated myelopathy.

B Renjifo 1, I Borrero 1, M Essex 1
PMCID: PMC188940  PMID: 7884912

Abstract

Tumaco, Colombia, is an area with elevated rates of tropical spastic paraparesis/human T-cell leukemia virus type I (HTLV-I)-associated myelopathy (TSP/HAM). We have identified a mutation in nucleotide 7959 of the tax gene of 14 Tumaco HTLV-I isolates (14 positive of 14 tested) that was present in 5 of 14 (35%) TSP/HAM patients from Japan and in 8 of 11 (72%) TSP/HAM patients from other geographic locations. In contrast, this mutation was found in only 2 of 21 (9.5%) HTLV-I-infected subjects outside of Tumaco who did not have TSP/HAM. tax clones with nucleotide mutations including one at nucleotide 7959 showed a greater ability to transactivate the HTLV-I U3 promoter. However, this effect was not observed when two clones that differed only in nucleotide 7959 were compared. These results suggest that HTLV-I-infected individuals carrying isolates with this tax mutation are at higher risk for developing TSP/HAM.

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Selected References

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