Summary
Item |
Summary |
Project
|
22195774
|
Virus Name
|
HBV/HIV |
Sample Number
|
21 |
Disease
|
HIV/HBV co-infected |
Country
|
Gambia |
Sample
ID |
Sample ID |
Age |
Gender |
Origin |
Detail |
1 |
1 |
42 |
M |
Gambia |
View |
2 |
3 |
37 |
F |
Gambia |
View |
3 |
5 |
40 |
M |
Gambia |
View |
4 |
6 |
35 |
F |
Gambia |
View |
5 |
7 |
28 |
F |
Gambia |
View |
6 |
9 |
44 |
M |
Gambia |
View |
7 |
10 |
40 |
M |
Gambia |
View |
8 |
12 |
48 |
M |
Gambia |
View |
9 |
13 |
36 |
M |
Gambia |
View |
10 |
16 |
41 |
F |
Gambia |
View |
11 |
17 |
27 |
M |
Gambia |
View |
12 |
18 |
50 |
F |
Gambia |
View |
13 |
19 |
24 |
F |
Gambia |
View |
14 |
21 |
42 |
F |
Gambia |
View |
15 |
22 |
29 |
F |
Gambia |
View |
16 |
23 |
52 |
M |
Gambia |
View |
17 |
24 |
29 |
F |
Gambia |
View |
18 |
25 |
31 |
F |
Gambia |
View |
19 |
26 |
50 |
M |
Gambia |
View |
20 |
28 |
39 |
F |
Gambia |
View |
21 |
29 |
30 |
F |
Gambia |
View |
Literature
Item |
Summary |
PMID
|
22195774 |
Title
|
Emergence of HBV resistance to lamivudine (3TC) in HIV/HBV co-infected patients in The Gambia, West Africa. |
Abstract
|
BACKGROUND: Lamivudine (3TC) is a potent inhibitor of both Hepatitis B virus (HBV) and Human Immunodeficiency Virus (HIV) replication and is part of first-line highly active antiretroviral therapy (HAART) in the Gambia. Unfortunately, the effectiveness of 3TC against HBV is limited by the emergence of resistant strains. AIM: The aim of this retrospective study was to characterise 3TC-resistant mutations in HBV from co-infected patients receiving HAART, by generating HBV polymerase sequence data and viral loads from HBV genotype E infected patients, both at initiation and during a course of 3TC therapy. METHOD: Samples from 21 HBV chronic carriers co-infected with HIV-1 (n = 18), HIV-2 (n = 2) and HIV-dual (n = 1) receiving HAART for a period of 6-52 months were analysed for the emergence of 3TC-resistance mutations. FINDINGS: Sixteen out of 21 HBV/HIV co-infected patients responded well to HAART treatment maintaining suppression of HBV viraemia to low (= 104 copies/mL) (n = 5) or undetectable levels (< 260 copies/ml) (n = 11). Out of the 5 non-responders, 3 had developed 3TC-resistant HBV strains showing mutations in the YMDD motif at position 204 of the RT domain of the HBV polymerase. One patient showed the M204V+ L180M+ V173L+ triple mutation associated with a vaccine escape phenotype, which could be of public health concern in a country with a national HBV vaccination programme. All except one patient was infected with HBV genotype E. CONCLUSIONS: Our findings confirm the risk of 3TC mutations in HAART patients following monotherapy. This is a novel study on 3TC resistance in HBV genotype E patients and encourage the use of tenofovir (in association with 3TC), which has not shown unequivocally documented HBV resistance to date, as part of first-line therapy in HIV/HBV co-infected patients in West Africa.HBV- hepatitis B infection; HIV- human immunodeficiency virus; HAART- antiretroviral therapy. |
|