Assessing Functional Similarity of Biosimilar ABP 654 and Ustekinumab in Samples from Patients with Crohn’s Disease
Bibliographic record
Abstract
Purpose: ABP 654 is the first FDA-approved interchangeable biosimilar for ustekinumab reference product (RP). To support the totality of evidence (TOE), in vitro pharmacology studies were conducted in peripheral blood mononuclear cells (PBMCs) from healthy human donors and Crohn’s disease (CD) patients to evaluate IL-23 and IL-12 inhibition by ABP 654 and ustekinumab RP relevant to the mechanism of action of chronic inflammation. Methods: ABP 654 and ustekinumab RP were assessed using inhibition of IL-23 and IL-12-mediated IFN-γ release, signal transducer and activator of transcription (STAT)3 and STAT4 phosphorylation, and IL-17 release. IFN-γ levels were determined using homogenous time-resolved fluorescence (HTRF). STAT3 and STAT4 phosphorylation were measured by flow cytometry. IL-17 was measured using a Cisbio IL-17 detection kit. IC 50 values were calculated to assess the relative potency of ABP 654 and ustekinumab RP. Results: ABP 654 and ustekinumab RP demonstrated similar inhibition and relative potency of IL-23 and IL-12-mediated IFN-γ release, and no difference in inhibition of IL-23/IL-12-mediated STAT3/STAT4 phosphorylation in healthy donor PBMCs, as evidenced by the overlapping standard deviation (SD). In CD PBMCs, ABP 654 and ustekinumab RP also showed no difference in IC 50 values for inhibition of IL-23/IL-12-mediated STAT3/STAT4 phosphorylation. ABP 654 and ustekinumab RP showed no difference in IC 50 values for IL-23-induced IL-17 release, in either healthy (ABP 654, 458.7± 110.8 pM; ustekinumab (EU), 514.6± 48.7 pM) or CD (ABP 654, 260.8± 88.5 pM; ustekinumab (EU), 256.9± 96.8 pM) donor cells with overlapping SD. Conclusion: These studies demonstrated similar inhibition of IL-23 and IL-12 function by ABP 654 and ustekinumab RP in both healthy and CD PBMCs. Overall, these assays support the conclusion that ABP 654 and ustekinumab RP are functionally similar, thereby contributing to the TOE supporting a demonstration of biosimilarity. Keywords: ABP 654, biosimilar pharmaceuticals, Crohn’s disease, interleukin-12, interleukin-23, interchangeable
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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 | 0.001 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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".