Evidence map›Paper›PMID 22988081›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2012

Synthesis of site-specific antibody-drug conjugates using unnatural amino acids.

Jun Y Axup, Krishna M Bajjuri, Melissa Ritland, Benjamin M Hutchins, Chan Hyuk Kim, Stephanie A Kazane, Rajkumar Halder, Jane S Forsyth, Antonio F Santidrian, Karin Stafin and 11 more

Open access · bronzeAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 259 papers.

0numbers the graph read from it
0cells of the map it votes in
259citing papers in PubMed
38.4field-weighted citation impact, top 1% 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

259 citing papers in PubMed, 567 citations in OpenAlex.

  1. Review
  2. Review
  3. Antibody-drug conjugate engineering: from design to efficacy and safety.Signal transduction and targeted therapy · 2026
    Review
  4. Review
  5. Review
  6. Review
  7. Article
  8. Therapeutic peptides and proteins: Status and developments in drug delivery.Journal of controlled release : official journal of the Controlled Release Society · 2026
    Review
  9. Article
  10. Article
  11. Article
  12. Review
  13. Article
  14. Article
  15. Article
  16. Review
  17. Article
  18. Review
  19. Review
  20. Glycan Remodeling Technologies for Enhancing Antibody Function.Advances in experimental medicine and biology · 2026
    Review

199 more citing papers are in PubMed but not listed here.

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

21 authors at 3 institutions in 1 country.

Jun Y AxupDepartment of Chemistry, The Scripps Research Institute, La Jolla, CA 92037, USA.
Krishna M Bajjuri
Melissa Ritland
Benjamin M Hutchins
Chan Hyuk Kim
Stephanie A Kazane
Rajkumar Halder
Jane S Forsyth
Antonio F Santidrian
Karin Stafin
Yingchun Lu
Hon Tran
Aaron J Seller
Sandra L Biroc
Aga Szydlik
Jason K Pinkstaff
Feng Tian
Subhash C Sinha
Brunhilde Felding-Habermann
Vaughn V Smider
Peter G Schultz
Scripps Research Institute · USAmbrx (United States) · USLa Jolla Alcohol Research · US

Funding

IN VIVO INCORPORATION OF UNNATURAL AMINO ACIDSR01GM062159 · NIGMS · SCRIPPS RESEARCH INSTITUTE, THE · PI SCHULTZ, PETER G · 2001 to 2022
$8.2M
NIGMS NIH HHS R01 GM062159NIGMS NIH HHS R01GM062159
6 · The paper itself

Abstract

Antibody-drug conjugates (ADCs) allow selective targeting of cytotoxic drugs to cancer cells presenting tumor-associated surface markers, thereby minimizing systemic toxicity. Traditionally, the drug is conjugated nonselectively to cysteine or lysine residues in the antibody. However, these strategies often lead to heterogeneous products, which make optimization of the biological, physical, and pharmacological properties of an ADC challenging. Here we demonstrate the use of genetically encoded unnatural amino acids with orthogonal chemical reactivity to synthesize homogeneous ADCs with precise control of conjugation site and stoichiometry. p-Acetylphenylalanine was site-specifically incorporated into an anti-Her2 antibody Fab fragment and full-length IgG in Escherichia coli and mammalian cells, respectively. The mutant protein was selectively and efficiently conjugated to an auristatin derivative through a stable oxime linkage. The resulting conjugates demonstrated excellent pharmacokinetics, potent in vitro cytotoxic activity against Her2(+) cancer cells, and complete tumor regression in rodent xenograft treatment models. The synthesis and characterization of homogeneous ADCs with medicinal chemistry-like control over macromolecular structure should facilitate the optimization of ADCs for a host of therapeutic uses.

Indexed as

Amino AcidsAminobenzoatesAnimalsAntibodies, Monoclonal, HumanizedBreast NeoplasmsCell Line, TumorDrug DiscoveryEnzyme-Linked Immunosorbent AssayErb-b2 Receptor Tyrosine KinasesEscherichia coliFemaleHumansImmunoconjugatesImmunoglobulin GMiceMice, SCIDAmino AcidsAminobenzoatesAntibodies, Monoclonal, HumanizedauristatinErb-b2 Receptor Tyrosine KinasesImmunoconjugatesImmunoglobulin GOligopeptidesTrastuzumab

Identifiers

PMID22988081
PMCPMC3479532
OpenAlexW2126183505

What OpenQuestion holds

Textmetadata
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.