Phenotypic characterization of a clinical HBV/G isolate relative to a co-infecting HBV/A strain and HBV/A/G recombinant strains
Bibliographic record
Abstract
Hepatitis B virus genotype G (HBV/G) is a unique genotype of HBV which contains a 36-nucleotide insertion in the Core gene as well as 2 mutations that lead to stop codons in the Pre-Core coding region. Chronic infection with HBV/G is not known to occur without a co-infecting HBV genotype, suggesting that it is defective on its own. This study aims to look at the replication capacity of HBV/G, HBV/A, and HBV/A/G recombinant strains circulating in Canada and to determine the relationship between co-infecting strains. Four full-length HBV genomes were isolated from 2 different patients and transiently transfected into the HepG2 human hepatoma cell line for phenotypic analysis of each strain. HBV/G, HBV/A and HBV/A/G recombinant strains were isolated from Patient 1, while a different HBV/A/G recombinant strain was isolated from Patient 2. HBV replication capacity was measured using a quantitative real time PCR assay. Markers of replication, such as secreted HBsAg and HBeAg, intracellular core particles and replicative DNA intermediates were measured by ELISA, Western blot and Southern blot, respectively. HBV/G demonstrated a higher replicative capability, relative to its co-infecting strains, while both HBV/A/G strains had levels of secreted HBV DNA greater than HBV/A alone, suggesting a modulating effect due to recombination. Replication marker levels revealed possible reasons for a co-infection requirement during HBV/G infection such as HBeAg for chronicity. These observations demonstrate the potential interactions of HBV/G with its co-infecting HBV genotype and provide the first reported phenotypic analysis of a HBV recombinant.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".