dc.creator | Magri, Mariana Cavalheiro | |
dc.creator | Costa, Emanuela Avelar Silva | |
dc.creator | Caterino-de-Araujo, Adele | |
dc.date.accessioned | 2013-10-14T12:34:07Z | |
dc.date.accessioned | 2018-07-04T15:57:18Z | |
dc.date.available | 2013-10-14T12:34:07Z | |
dc.date.available | 2018-07-04T15:57:18Z | |
dc.date.created | 2013-10-14T12:34:07Z | |
dc.date.issued | 2012 | |
dc.identifier | VIROLOGY JOURNAL, LONDON, v. 9, SEP 4, 2012 | |
dc.identifier | 1743-422X | |
dc.identifier | http://www.producao.usp.br/handle/BDPI/34456 | |
dc.identifier | 10.1186/1743-422X-9-184 | |
dc.identifier | http://dx.doi.org/10.1186/1743-422X-9-184 | |
dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/1629659 | |
dc.description.abstract | Background: In Virology Journal 2011, 8: 535, Neto et al. described point mutations into Tax-responsive elements (TRE) of the LTR region of HTLV-1 isolates from asymptomatic carriers from Sao Paulo, Brazil, and hypothesized that the presence of the G232A mutation in the TRE-1 increase viral proliferation and consequently the proviral load (PvL), while the A184G mutation in the TRE-2 do not have such effect. Findings: We performed the real-time PCR assay (pol) and sequenced LTR region of HTLV-1 isolates from 24 HIV/HTLV-1-coinfected patients without HTLV-1-associated diseases from the same geographic area. These sequences were classified as belonging to the transcontinental subgroup A of the Cosmopolitan subtype a. The frequency of G232A mutation (16/24, 66.7%) was high as much as 61.8% reported by Neto's in HTLV-1 asymptomatic carriers with high PvL. High frequency (13/24, 54.2%) of double mutations G232A and A184G was also detected in HIV/HTLV-1-coinfected patients. We did not quantify PvL, but comparative analyses of the cycle threshold (Ct) median values of the group of isolates presenting the mutated-types sequences (Ct 33.5, n = 16) versus the group of isolates with the wild-type sequences (Ct 32, n = 8) showed no statistical difference (p = 0.4220). Conclusion: The frequencies of mutated-type sequences in the TRE-1 and TRE-2 motifs were high in HIV/HTLV-1-coinfected patients from Sao Paulo, Brazil. If these LTR point mutations have predictive value for the development of HTLV-1-associated diseases or they correspond to the subtype of virus that circulate in this geographic area has to be determined. | |
dc.language | eng | |
dc.publisher | BIOMED CENTRAL LTD | |
dc.publisher | LONDON | |
dc.relation | VIROLOGY JOURNAL | |
dc.rights | Copyright BIOMED CENTRAL LTD | |
dc.rights | openAccess | |
dc.subject | HTLV-1 | |
dc.subject | LTR REGION | |
dc.subject | SEQUENCING | |
dc.title | LTR point mutations in the Tax-responsive elements of HTLV-1 isolates from HIV/HTLV-1-coinfected patients | |
dc.type | Artículos de revistas | |