Pharmacokinetics and Pharmacodynamics of CNTO 528, a Novel Erythropoietin Receptor Agonist in Normal and Anemic Rats.
Bibliographic record
Abstract
Abstract CNTO 528 is a member of a group of novel stimulants of erythropoiesis that has recently entered clinical trials. Although CNTO 528 bears no sequence homology to erythropoietin (EPO), it is an EPO receptor agonist, capable of rescuing EPO-dependent cells from apoptosis in vitro and stimulating erythropoiesis in vivo. The purpose of these experiments was to explore the pharmacodynamics and pharmacokinetics of CNTO 528 in normal rats and to evaluate its efficacy in rat models of anemia. In vitro, CNTO 528 was approximately 10-fold less potent on a molar basis than recombinant human EPO (rhEPO) in stimulating the growth of UT-7EPO cells. Despite the lower in vitro potency, when compared to rhEPO and darbepoetin in normal rats, a single subcutaneous dose of CNTO 528 caused a longer-lived reticulocytosis and a longer-lived increase in hemoglobin. Also, CNTO 528 caused only minor changes in red cell distribution width (RDW) or mean cell volume (MCV) led to the release of mature reticulocytes and had no effect on mean platelet volume (MPV). We have also shown that CNTO 528 was efficacious in rat models of anemia and in a rat model of pure red cell aplasia. Taken together, our data show that CNTO 528 is a novel stimulant of erythropoiesis in rats.
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 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 | 0.001 |
| 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".