Evidence map›Paper›PMID 35192429›Full record

ArticlemAbs

Improved therapeutic index of an acidic pH-selective antibody.

Peter S Lee, Katherine G MacDonald, Evan Massi, Pamela V Chew, Christine Bee, Padma Perkins, Bryant Chau, Kent Thudium, Jack Lohre, Pradyot Nandi and 8 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 20 papers.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed
3.9field-weighted citation impact, top 6% 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

20 citing papers in PubMed, 29 citations in OpenAlex.

  1. Article
  2. Review
  3. Review
  4. Review
  5. Conditionally Activatable Antibody Platforms: Mechanisms, Modalities, and Clinical Translation Potential.BioDrugs : clinical immunotherapeutics, biopharmaceuticals and gene therapy · 2026
    Review
  6. Article
  7. Article
  8. Article
  9. Article
  10. Computational design of pH-sensitive binders.bioRxiv : the preprint server for biology · 2025
    Article
  11. Review
  12. Review
  13. Article
  14. Article
  15. Review
  16. Comparative Performance of High-Throughput Methods for Protein pJournal of chemical information and modeling · 2023
    Article
  17. Review
  18. Review
  19. Review
  20. Article
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

18 authors at 6 institutions in 1 country.

Peter S LeeDiscovery Biotherapeutics, Bristol Myers Squibb, Redwood City, CA, USA.ORCID 0000-0002-8745-4034
Katherine G MacDonaldImmuno-Oncology Research, Bristol Myers Squibb, Redwood City, CA, USA.
Evan MassiImmuno-Oncology Research, Bristol Myers Squibb, Redwood City, CA, USA.
Pamela V ChewOncology Biology, Gilead Sciences, Foster City, CA, USA.
Christine BeeDiscovery Biology, Frontier Medicines, South San Francisco, CA, USA.
Padma PerkinsImmuno-Oncology Research, Bristol Myers Squibb, Redwood City, CA, USA.
Bryant ChauKyverna, Synthetic Biology, Emeryville, CA, USA.
Kent ThudiumImmuno-Oncology Research, Bristol Myers Squibb, Redwood City, CA, USA.
Jack LohreIn Vivo Pharmacology, Bristol Myers Squibb, Redwood City, CA, USA.
Pradyot NandiPharmaceutical Candidate Optimization, Bristol Myers Squibb, Lawrenceville, NJ, USA.
Ekaterina G DeyanovaPharmaceutical Candidate Optimization, Bristol Myers Squibb, Lawrenceville, NJ, USA.
Ishita BarmanTherapeutic Discovery, 3T Biosciences, South San Francisco, CA, USA.
Olafur GudmundssonPharmaceutical Candidate Optimization, Bristol Myers Squibb, Lawrenceville, NJ, USA.
Gavin DollingerDiscovery Biotherapeutics, Bristol Myers Squibb, Redwood City, CA, USA.
Tim SproulIn Vivo Pharmacology, UNITY Biotechnology, South San Francisco, CA, USA.
John J EngelhardtImmuno-Oncology Discovery, Abbvie, South San Francisco, CA, USA.
Pavel StropBiologics Discovery, Tallac Therapeutics, Burlingame, CA, USA.
Arvind RajpalLarge Molecule Drug Discovery, Genentech Research and Early Development, South San Francisco, CA, USA.
Bristol-Myers Squibb (United States) · USAbbVie (United States) · USBD Biosciences (United States) · USGilead Sciences (United States) · USNew Frontier · USUnity Biotechnology (United States) · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Although therapeutically efficacious, ipilimumab can exhibit dose-limiting toxicity that prevents maximal efficacious clinical outcomes and can lead to discontinuation of treatment. We hypothesized that an acidic pH-selective ipilimumab (pH Ipi), which preferentially and reversibly targets the acidic tumor microenvironment over the neutral periphery, may have a more favorable therapeutic index. While ipilimumab has pH-independent CTLA-4 affinity, pH Ipi variants have been engineered to have up to 50-fold enhanced affinity to CTLA-4 at pH 6.0 compared to pH 7.4. In hCTLA-4 knock-in mice, these variants have maintained anti-tumor activity and reduced peripheral activation, a surrogate marker for toxicity. pH-sensitive therapeutic antibodies may be a differentiating paradigm and a novel modality for enhanced tumor targeting and improved safety profiles.

Indexed as

NeoplasmsTumor MicroenvironmentAnimalsHydrogen-Ion ConcentrationIpilimumabMiceTherapeutic IndexIpilimumabAntibodyconditional activationimmunologyoncologypHselectivity

Identifiers

PMID35192429
PMCPMC8865267
OpenAlexW4213336207

What Socratic 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 Socratic graph.