Geographical and ethnic distribution of the HBV C/D recombinant on the Qinghai-Tibet Plateau.
Two forms of hepatitis B virus (HBV) C/D recombinant have been identified in western China, but little is known about their geographical and ethnic distributions, and particularly the clinical significance and specific mutations in the pre-core region. To address these questions, a total of 624 chro...
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| Format: | Article |
| Language: | English |
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Public Library of Science (PLoS)
2011-01-01
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| Series: | PLoS ONE |
| Online Access: | http://europepmc.org/articles/PMC3073994?pdf=render |
| _version_ | 1828414791018872832 |
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| author | Bin Zhou Lei Xiao Zhanhui Wang Ellen T Chang Jinjun Chen Jinlin Hou |
| author_facet | Bin Zhou Lei Xiao Zhanhui Wang Ellen T Chang Jinjun Chen Jinlin Hou |
| author_sort | Bin Zhou |
| collection | DOAJ |
| description | Two forms of hepatitis B virus (HBV) C/D recombinant have been identified in western China, but little is known about their geographical and ethnic distributions, and particularly the clinical significance and specific mutations in the pre-core region. To address these questions, a total of 624 chronic HBV carriers from four ethnic populations representing five provinces in western China were enrolled in this study. Genotypes were firstly determined by restriction fragment length polymorphism, and then confirmed by full or partial genome nucleotide sequencing. The distribution of HBV genotypes was as follows: HBV/B: 40 (6.4%); HBV/C: 221 (35.4%); HBV/D: 39 (6.3%); HBV/CD: 324 (51.9%). In the 324 HBV C/D recombinant infections, 244 (75.3%) were infected with the "CD1" and 80 (24.7%) were infected with the "CD2." The distribution of HBV genotypes exhibited distinct patterns in different regions and ethnic populations. Geographically, the C/D recombinant was the most prevalent HBV strain on the Qinghai-Tibet Plateau. Ethnically, the C/D recombinant had a higher prevalence in Tibetan patients than in other populations. Clinically, patients with HBV/CD1 showed significantly lower levels of serum total bilirubin than patients with HBV/C2. The prevalence of HBeAg was comparable between patients with HBV/CD1 and HBV/C2 (63.3% vs 50.0%, P = 0.118) whether patients were taken together or stratified by age into three groups (65.6% vs 58.8% in <30 years, P = 0.758; 61.9% vs 48.0% in 30-50 years, P = 0.244; 64.3% vs 33.3%, P = 0.336). Virologically HBV/CD1 had a significantly lower frequency of G1896A than HBV/C2. In conclusion, the HBV C/D recombinant is restricted to the Qinghai-Tibet Plateau in western China and is found predominantly in Tibetans. The predominance of the premature pre-core stop mutation G1896A in patients with the HBV C/D recombinant may account for the higher prevalence of HBeAg in these patients. |
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| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-12-10T13:32:48Z |
| publishDate | 2011-01-01 |
| publisher | Public Library of Science (PLoS) |
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| spelling | doaj.art-bf9b61f140f045ddb449347be50b5e452022-12-22T01:46:55ZengPublic Library of Science (PLoS)PLoS ONE1932-62032011-01-0164e1870810.1371/journal.pone.0018708Geographical and ethnic distribution of the HBV C/D recombinant on the Qinghai-Tibet Plateau.Bin ZhouLei XiaoZhanhui WangEllen T ChangJinjun ChenJinlin HouTwo forms of hepatitis B virus (HBV) C/D recombinant have been identified in western China, but little is known about their geographical and ethnic distributions, and particularly the clinical significance and specific mutations in the pre-core region. To address these questions, a total of 624 chronic HBV carriers from four ethnic populations representing five provinces in western China were enrolled in this study. Genotypes were firstly determined by restriction fragment length polymorphism, and then confirmed by full or partial genome nucleotide sequencing. The distribution of HBV genotypes was as follows: HBV/B: 40 (6.4%); HBV/C: 221 (35.4%); HBV/D: 39 (6.3%); HBV/CD: 324 (51.9%). In the 324 HBV C/D recombinant infections, 244 (75.3%) were infected with the "CD1" and 80 (24.7%) were infected with the "CD2." The distribution of HBV genotypes exhibited distinct patterns in different regions and ethnic populations. Geographically, the C/D recombinant was the most prevalent HBV strain on the Qinghai-Tibet Plateau. Ethnically, the C/D recombinant had a higher prevalence in Tibetan patients than in other populations. Clinically, patients with HBV/CD1 showed significantly lower levels of serum total bilirubin than patients with HBV/C2. The prevalence of HBeAg was comparable between patients with HBV/CD1 and HBV/C2 (63.3% vs 50.0%, P = 0.118) whether patients were taken together or stratified by age into three groups (65.6% vs 58.8% in <30 years, P = 0.758; 61.9% vs 48.0% in 30-50 years, P = 0.244; 64.3% vs 33.3%, P = 0.336). Virologically HBV/CD1 had a significantly lower frequency of G1896A than HBV/C2. In conclusion, the HBV C/D recombinant is restricted to the Qinghai-Tibet Plateau in western China and is found predominantly in Tibetans. The predominance of the premature pre-core stop mutation G1896A in patients with the HBV C/D recombinant may account for the higher prevalence of HBeAg in these patients.http://europepmc.org/articles/PMC3073994?pdf=render |
| spellingShingle | Bin Zhou Lei Xiao Zhanhui Wang Ellen T Chang Jinjun Chen Jinlin Hou Geographical and ethnic distribution of the HBV C/D recombinant on the Qinghai-Tibet Plateau. PLoS ONE |
| title | Geographical and ethnic distribution of the HBV C/D recombinant on the Qinghai-Tibet Plateau. |
| title_full | Geographical and ethnic distribution of the HBV C/D recombinant on the Qinghai-Tibet Plateau. |
| title_fullStr | Geographical and ethnic distribution of the HBV C/D recombinant on the Qinghai-Tibet Plateau. |
| title_full_unstemmed | Geographical and ethnic distribution of the HBV C/D recombinant on the Qinghai-Tibet Plateau. |
| title_short | Geographical and ethnic distribution of the HBV C/D recombinant on the Qinghai-Tibet Plateau. |
| title_sort | geographical and ethnic distribution of the hbv c d recombinant on the qinghai tibet plateau |
| url | http://europepmc.org/articles/PMC3073994?pdf=render |
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