Evidence map›Paper›PMID 34719330›Full record

ArticlemAbs

Preclinical characterization of bemarituzumab, an anti-FGFR2b antibody for the treatment of cancer.

Hong Xiang, Abigael G Chan, Ago Ahene, David I Bellovin, Rong Deng, Amy W Hsu, Ursula Jeffry, Servando Palencia, Janine Powers, James Zanghi and 1 more

Open access · goldAbstract read
In one paragraph

Article in mAbs. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 41 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
41citing papers in PubMed, 2 pooled it
1.8field-weighted citation impact, top 14% of its field
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.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

41 citing papers in PubMed, 2 syntheses or guidelines pooled it, 44 citations in OpenAlex.

  1. Pooled it
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  3. Trial
  4. Bemarituzumab as first-line treatment for locally advanced or metastatic gastric/gastroesophageal junction adenocarcinoma: final analysis of the randomized phase 2 FIGHT trial.Gastric cancer : official journal of the International Gastric Cancer Association and the Japanese Gastric Cancer Association · 2024
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  13. PI3Kα Inhibitor and Degrader Inavolisib Can Co-opt FGFR2 to Enhance Responses in Patients with PIK3CA-Mutated Solid Tumors and in Preclinical Models.Clinical cancer research : an official journal of the American Association for Cancer Research · 2026
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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

11 authors at 4 institutions in 2 countries.

Hong XiangFive Prime Therapeutics, Inc, South San Francisco, California.ORCID 0000-0001-6753-4283
Abigael G ChanFive Prime Therapeutics, Inc, South San Francisco, California.
Ago AheneFive Prime Therapeutics, Inc, South San Francisco, California.
David I BellovinFive Prime Therapeutics, Inc, South San Francisco, California.
Rong DengR&D Q-Pharm Consulting LLC, Pleasanton.
Amy W HsuFive Prime Therapeutics, Inc, South San Francisco, California.
Ursula JeffryFive Prime Therapeutics, Inc, South San Francisco, California.
Servando PalenciaFive Prime Therapeutics, Inc, South San Francisco, California.
Janine PowersFive Prime Therapeutics, Inc, South San Francisco, California.
James ZanghiFive Prime Therapeutics, Inc, South San Francisco, California.
Helen CollinsFive Prime Therapeutics, Inc, South San Francisco, California.
Amgen (United States) · USFive Prime Therapeutics (United States) · USMerck & Co., Inc., Rahway, NJ, USA (United States) · USQ-Pharm · AU

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Bemarituzumab (FPA144) is a first-in-class, humanized, afucosylated immunoglobulin G1 monoclonal antibody (mAb) directed against fibroblast growth factor receptor 2b (FGFR2b) with two mechanisms of action against FGFR2b-overexpressing tumors: inhibition of FGFR2b signaling and enhanced antibody-dependent cell-mediated cytotoxicity (ADCC). Bemarituzumab is being developed as a cancer therapeutic, and we summarize here the key nonclinical data that supported moving it into clinical trials. Bemarituzumab displayed sub-nanomolar cross-species affinity for FGFR2b receptors, with >20-fold enhanced binding affinity to human Fc gamma receptor IIIa compared with the fucosylated version. In vitro, bemarituzumab induced potent ADCC against FGFR2b-expressing tumor cells, and inhibited FGFR2 phosphorylation and proliferation of SNU-16 gastric cancer cells in a concentration-dependent manner. In vivo, bemarituzumab inhibited tumor growth through inhibition of the FGFR2b pathway and/or ADCC in mouse models. Bemarituzumab demonstrated enhanced anti-tumor activity in combination with chemotherapy, and due to bemarituzumab-induced natural killer cell-dependent increase in programmed death-ligand 1, also resulted in enhanced anti-tumor activity when combined with an anti-programmed death-1 antibody. Repeat-dose toxicity studies established the highest non-severely-toxic dose at 1 and 100 mg/kg in rats and cynomolgus monkeys, respectively. In pharmacokinetic (PK) studies, bemarituzumab exposure increase was greater than dose-proportional, with the linear clearance in the expected dose range for a mAb. The PK data in cynomolgus monkeys were used to project bemarituzumab linear PK in humans, which were consistent with the observed human Phase 1 data. These key nonclinical studies facilitated the successful advancement of bemarituzumab into the clinic.

Indexed as

Receptor, Fibroblast Growth Factor, Type 2Stomach NeoplasmsAnimalsAntibodies, Monoclonal, HumanizedAntibody-Dependent Cell CytotoxicityCell Line, TumorMiceRatsAntibodies, Monoclonal, HumanizedbemarituzumabReceptor, Fibroblast Growth Factor, Type 2afucosylated antibody; antibody-dependent cell-mediated cytoxicity; phosphorylation in vitroanti-FGFR2b antibodyanti-tumor efficacyBemarituzumabcell proliferation in vitrofibroblast growth factor receptorpharmacokineticstoxicology

Identifiers

PMID34719330
PMCPMC8565817
OpenAlexW3208123934

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
Read underepoch 390

Registered trials

None linked

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.