Delivery of bioactive, gel‐isolated proteins into live cells
Bibliographic record
Abstract
The delivery of proteins into live cells is a promising strategy for the targeted modulation of protein-protein interactions and the manipulation of specific cellular functions. Cellular delivery can be facilitated by complexing the protein of interest with carrier molecules. Recently, an amphipatic peptide was identified, Pep-1 (KETWWETWWTE WSQPKKKRKV), which crosses the plasma membrane of many cell types to carry and deliver proteins as large as antibodies. Pep-1 effectively delivers proteins in solution; but Pep-1 is not suitable for delivering sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) isolated proteins because Pep-1 complexes with cargo proteins are destroyed by SDS. Here, we report cellular delivery of SDS-PAGE-isolated proteins, without causing cellular damage, by using a nonionic detergent, Triton X-100, as carrier. To determine the specificity of our method, we separated antibodies against different intracellular targets by nonreducing SDS-PAGE. Following electrophoresis, the antibody bands were detected by zinc-imidazole reverse staining, excised, in-gel refolded with Triton X-100, and eluted in detergent-free phosphate-buffered saline. When overlaid on cultured NIH 3T3 cells, the antibodies penetrated the cells localizing to their corresponding intracellular targets. These results are proof-of-principle for the delivery of gel-isolated bioactive proteins into cultured cells and suggest new ways for experimental protein therapy and for studying protein-protein interactions using gel-isolated protein.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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".