Hammerhead Ribozyme as a Therapeutic Agent for Hyperlipidemia: Production of Truncated Apolipoprotein B and Hypolipidemic Effects in a Dyslipidemia Murine Model
Bibliographic record
Abstract
In humans, overproduction of apolipoprotein B (apoB) is positively associated with premature coronary artery diseases. To reduce the levels of apoB mRNA, we used adenovirus-mediated vector to target hammerhead ribozyme at GUA(6679) downward arrow of apoB mRNA (designated AvRB15) in the liver of a dyslipidemic mouse model that is deficient in apoB mRNA editing enzyme and overexpresses human apoB100. In this study, we delivered approximately 4 x 10(11) virus particles of AvRB15 (active ribozyme) or AvRB15-mutant (inactive ribozyme) to the animals. Using Southern blot analysis, we readily detected RB15 DNA in the mouse liver as long as day 35 after injection. This result was correlated with the RNA expression of RB15 by RNase protection assay. Using reverse ligation-mediated polymerase chain reaction, the 3' cleavage product of apoB mRNA was detected, and the exact cleavage site was confirmed by sequencing. Importantly, the levels of human and mouse apoB mRNA decreased approximately 80% after AvRB15 transduction. There was a marked decrease in plasma cholesterol, triglyceride, and human apoB of 42, 51, and 62%, respectively, when compared with the inactive ribozyme-treated group. Moreover, ribozyme cleavage of apoB mRNA generated a truncated protein of the expected size (apoB48.1), which was associated with lipoprotein particles in the very low density, low density, and high density lipoprotein fractions. Taken together, these results indicate that apoB mRNA-specific hammerhead ribozyme can be used as a potential therapeutic agent to modulate apoB gene expression and to treat hyperlipidemia.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| 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) | 0.000 | 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 teacher head, 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".