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ArticleClinical pharmacokinetics2026

Elranatamab Population Pharmacokinetics and Exposure-Response for Cytokine Release Syndrome in Patients with Relapsed or Refractory Multiple Myeloma.

Jennifer E Hibma, Donald Irby, Alan Liu, Mohamed Elmeliegy, Lindsay E King, David Gifondorwa, Sibo Jiang, Kamrine E Poels, Pooneh Soltantabar, Hoi-Kei Lon and 4 more

4 registry-linked trialsAbstract read
In one paragraph

Article in Clinical pharmacokinetics, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to 4 registered trials, which are not on this map. Not yet cited in PubMed.

0numbers the graph read from it
0cells of the map it votes in
0citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

NCT03269136 phase1completednot on this map

Magnetismm-1 a phase i, open label study to evaluate the safety, pharmacokinetic, pharmacodynamic and clinical activity of elranatamab (pf-06863135), a b-cell maturation antigen (bcma) - cd3 bispecific antibody, as a single agent and in combination with immunomodulatory agents in patients with relapsed/refractory advanced multiple myeloma (mm)

TypeinterventionalSponsorPfizerRan2017 to 2024Enrolled101ConditionsMultiple MyelomaArmsPF-06863135 monotherapy IV or SC, PF-06863135 + dexamethasone, PF-06863135 + lenalidomide, PF-06863135 + pomalidomide
NCT04649359 phase2active not recruitingnot on this map

Magnetismm-3 an open-label, multicenter, non-randomized phase 2 study of elranatamab (pf-06863135) monotherapy in participants with multiple myeloma who are refractory to at least one proteasome inhibitor, one immunomodulatory drug and one anti-cd38 antibody

TypeinterventionalSponsorPfizerRan2021 to 2026Enrolled187ConditionsMultiple MyelomaArmsElranatamab (PF-06863135)
NCT04798586 phase1completednot on this map

A phase i, open label study to evaluate the safety and pharmacokinetic of pf 06863135, a b cell maturation antigen (bcma) cd3 bispecific antibody, as a single agent in japanese participants with relapsed/refractory advanced multiple myeloma

TypeinterventionalSponsorPfizerRan2021 to 2023Enrolled4ConditionsRelapsed or Refractory Multiple MyelomaArmsElranatamab (PF-06863135)
NCT05014412 phase2completednot on this map

A phase 1/2, open-label, multicenter study to evaluate a dosing regimen with two step-up priming doses and longer dosing intervals of elranatamab (pf-06863135) monotherapy in participants with relapsed/refractory multiple myeloma

TypeinterventionalSponsorPfizerRan2021 to 2025Enrolled86ConditionsMultiple MyelomaArmsElranatamab
3 · Its place in the literature

Who cites it

0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

14 authors.

Jennifer E HibmaTranslational Clinical Sciences, Pfizer, Inc., 10777 Science Center Dr, San Diego, CA, 92121, USA. Jennifer.e.hibma@pfizer.com.ORCID http://orcid.org/0000-0002-6547-2186
Donald IrbyTranslational Clinical Sciences, Pfizer, Inc., 10777 Science Center Dr, San Diego, CA, 92121, USA.
Alan LiuTranslational Clinical Sciences, Pfizer, Inc., 10777 Science Center Dr, San Diego, CA, 92121, USA.
Mohamed ElmeliegyOncology Research and Development, Pfizer, Inc., San Diego, CA, USA.
Lindsay E KingTranslational Clinical Sciences, Pfizer, Inc., Cambridge, MA, USA.
David GifondorwaTranslational Clinical Sciences, Pfizer, Inc., Groton, CT, USA.
Sibo JiangOncology Research and Development, Pfizer, Inc., San Diego, CA, USA.
Kamrine E PoelsTranslational Clinical Sciences, Pfizer, Inc., 10777 Science Center Dr, San Diego, CA, 92121, USA.
Pooneh SoltantabarOncology Research and Development, Pfizer, Inc., San Diego, CA, USA.
Hoi-Kei LonOncology Research and Development, Pfizer, Inc., San Diego, CA, USA.
Blerta ShtyllaTranslational Clinical Sciences, Pfizer, Inc., 10777 Science Center Dr, San Diego, CA, 92121, USA.
Diane WangOncology Research and Development, Pfizer, Inc., San Diego, CA, USA.
Jason H WilliamsTranslational Clinical Sciences, Pfizer, Inc., 10777 Science Center Dr, San Diego, CA, 92121, USA.
Timothy NicholasTranslational Clinical Sciences, Pfizer, Inc., Groton, CT, USA.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

BACKGROUND AND

objectiveA population pharmacokinetics (PopPK) model was developed for elranatamab, a bispecific antibody targeting both B-cell maturation antigen (BCMA) and cluster of differentiation 3 (CD3), to characterize the PopPK of elranatamab and guide clinical development. Elranatamab is approved in several countries for the treatment of relapsed or refractory multiple myeloma.

methodsThe PopPK model incorporated data from four clinical studies and described both free and total elranatamab as well as soluble BCMA (sBCMA) using a semi-mechanistic two-compartment target-binding model. In total there were 13,233 observations from 321 participants who received intravenous (IV) or subcutaneous (SC) elranatamab monotherapy with doses ranging from 0.1 to 1000 µg/kg.

resultsElranatamab exhibited approximately linear PK over the dose range evaluated (i.e., 6-76 mg SC), with limited cellular target-mediated drug disposition and generally proportional exposure, with modest deviations at very high baseline sBCMA. None of the potential covariates evaluated, including age, sex, body weight, baseline sBCMA, and immunogenicity, were found to be clinically significant predictors of elranatamab exposure. Exposure-response analyses identified early peak exposure and tumor burden as key predictors of cytokine release syndrome (CRS), primarily after the first step-up dose. Simulations supported restarting treatment without re-priming after dose interruptions of up to 12 weeks.

conclusionThese findings support the approved fixed-dose regimen and provide a framework for clinical management of elranatamab in relapsed or refractory multiple myeloma. CLINICAL

trial registrationNCT03269136, NCT04798586, NCT04649359, NCT05014412.

Indexed as

Antibodies, BispecificCytokine Release SyndromeModels, BiologicalMultiple MyelomaAdultAgedAged, 80 and overB-Cell Maturation AntigenClinical Trials as TopicDose-Response Relationship, DrugFemaleHumansMaleMiddle AgedAntibodies, BispecificB-Cell Maturation Antigen

Identifiers

PMID42287565
PMCPMC13461831

What OpenQuestion holds

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Registered trials

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.