Design of the AFFINITY study: A randomized phase III study of a novel clusterin inhibitor, custirsen, plus cabazitaxel/prednisone (CbzP) versus CbzP alone as second-line chemotherapy in metastatic castration-resistant prostate cancer (mCRPC).
Bibliographic record
Abstract
TPS5103 Background: Custirsen enhances chemotherapeutic activity via inhibition of clusterin expression. Clusterin is a cytoprotective, antiapoptotic chaperone upregulated by anticancer therapies that confers treatment resistance. In a phase 2 study, mCRPC patients who had progressed within 6 mos of completing first-line docetaxel (DOC)/prednisone (P) and who were retreated with DOC/P and custirsen had a median overall survival of 15.8 mos. Lowering of serum clusterin level during second-line treatment was associated with significantly longer survival. CbzP has recently shown a survival advantage in patients with prostate cancer that has progressed after DOC therapy. The AFFINITY study was designed to evaluate in a larger study whether adding custirsen to CbzP will further improve survival in this patient population. Methods: AFFINITY was initiated in August 2012. Eligible patients in this phase 3, international, multicenter, open-label trial must have received ≥225 mg/m2 of DOC; have progressive disease as defined by RECIST 1.1, bone scan progression, and/or serum prostate-specific antigen level; have metastatic disease of the chest/abdomen/pelvis/bone; have adequate renal and liver function; and have a Karnofsky score ≥70%. Patients may have received up to 1 DOC regimen as well as abiraterone and/or enzalutamide. Approximately 630 patients will receive 21d cycles of Cbz (25 mg/m2IV q21d) + P (10 mg PO/d), either alone or with custirsen 640 mg IV given for 3 loading doses and then weekly until disease progression, unacceptable toxicity, or 10 cycles. The primary efficacy measure is overall survival. The secondary measure is proportion of patients alive without disease progression at Day 140 post-randomization. All efficacy analyses are intent to treat. Adverse events of all patients who receive ≥1 dose of custirsen or Cbz will be included in the safety analysis. This study is sponsored by Teva BPP R&D, Inc., in collaboration with OncoGenex Pharmaceuticals, Inc. Clinical trial information: NCT01578655.
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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 | 0.004 | 0.002 |
| Meta-epidemiology (narrow) | 0.003 | 0.001 |
| Meta-epidemiology (broad) | 0.003 | 0.002 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.002 |
| Scholarly communication | 0.002 | 0.002 |
| Open science | 0.002 | 0.001 |
| Research integrity | 0.003 | 0.005 |
| Insufficient payload (model declined to judge) | 0.009 | 0.002 |
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".