Microagregación genética y geográfica de aislados del virus linfotrópico humano tipo I (HTLV-I) en zonas endémicas del suroccidente de Colombia
With the aim to explore the restriction fragment length polymorphism (RFLP) to Dde I restriction enzyme, the proviral region from 5181 to 6624 nts of HTLV-I was amplified by PCR. The 1033 bp fragment containing the terminal 5' of gene pol and the surface domain of envelope gene (gp46) was ampli...
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Published in | Colombia médica (Cali, Colombia) Vol. 31; no. 3 |
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Main Author | |
Format | Journal Article |
Language | Spanish |
Published |
Universidad del Valle - Facultad de Salud
20.07.2005
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Subjects | |
Online Access | Get full text |
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Summary: | With the aim to explore the restriction fragment length polymorphism
(RFLP) to Dde I restriction enzyme, the proviral region from 5181 to
6624 nts of HTLV-I was amplified by PCR. The 1033 bp fragment
containing the terminal 5' of gene pol and the surface domain of
envelope gene (gp46) was amplified from PBMC proviral DNA of 29 HTLV-I
seropositive individuals from several areas of southwest Colombia. The
restriction analysis performed with Dde I revealed the circulation of
three different Dde I RFLP patterns. Pattern I (900 and 125 bp) was
observed in 34.5% (10/29) of isolates. Pattern IIa (700, 205 and 125
bp) was detected in 51.7% (15/29) of individuals. Finally, pattern IIb
(550, 350 and 125 bp) included only 13.8% (4/29) of samples studied.
Pattern IIb was exclusively detected in Tumaco in contrast with
patterns I and IIa that exhibited a tendency to be distributed in the
inland areas of southwest. Taken together results showed the existence
of a divergent microevolutionary mechanism operating in endemic areas
for HTLV-I infection of southwest Colombia.
Con el objetivo de definir el polimorfismo de patrones de
restricción (RFL) para la endonucleasa de restricción DdeI,
de la región del HTLV-I de los 5181 a los 6624 nucleótidos,
se amplificó un segmento de 1033 bp que incluía la
porción terminal 5' del gen Pol y el dominio de superficie del gen
Env (gp46) del ADN proviral de PBMC obtenido de 29 personas
seropositivas para el HTLV-I provenientes de varias zonas el
suroccidente de Colombia. El análisis de restricción
efectuado con la endonucleasa DdeI, reveló la existencia de tres
patrones de RFLPs diferentes. El patrón I (900 y 125 pb), se
observó en 34.5% (10/29) de los aislados. El patrón IIa (700,
205 y 125 pb) se determinó en 51.7% (15/29). Finalmente, el
patrón IIb (550, 350 y 125 pb) representó 13.8% (4/29)
aislados. El microagregado IIb se observó con predominio en
aislados de HTLV-I del municipio de Tumaco. Los patrones I y IIa se
distribuyeron con mayor frecuencia en el interior del suroccidente. Los
resultados obtenidos muestran la existencia de un mecanismo de
microevolución divergente de la región pol-env en los virus
de las áreas analizadas. |
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ISSN: | 0120-8322 |