Evidence map›Paper›PMID 31216930›Full record

ArticlemAbs2019

Antibody Fc engineering for enhanced neonatal Fc receptor binding and prolonged circulation half-life.

Brian C Mackness, Julie A Jaworski, Ekaterina Boudanova, Anna Park, Delphine Valente, Christine Mauriac, Olivier Pasquier, Thorsten Schmidt, Mostafa Kabiri, Abdullah Kandira and 2 more

Open access · goldAbstract read
In one paragraph

Article in mAbs, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 68 papers.

0numbers the graph read from it
0cells of the map it votes in
68citing papers in PubMed
7.5field-weighted citation impact, top 2% 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

68 citing papers in PubMed, 103 citations in OpenAlex.

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  8. A functional investigation of antibody Fc-FcRn variant binding guided bybioRxiv : the preprint server for biology · 2026
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8 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

12 authors at 2 institutions in 2 countries.

Brian C MacknessBiologics Research, Sanofi , Framingham , MA , USA.ORCID 0000-0002-3587-5603
Julie A JaworskiBiologics Research, Sanofi , Framingham , MA , USA.ORCID 0000-0002-0633-287X
Ekaterina BoudanovaBiologics Research, Sanofi , Framingham , MA , USA.
Anna ParkBiologics Research, Sanofi , Framingham , MA , USA.ORCID 0000-0002-6511-8363
Delphine ValenteDPMK, Sanofi , Vitry-Sur-Seine , France.
Christine MauriacDPMK, Sanofi , Vitry-Sur-Seine , France.
Olivier PasquierDPMK, Sanofi , Vitry-Sur-Seine , France.
Thorsten SchmidtBiologics Research, Sanofi , Frankurt , Germany.ORCID 0000-0001-9952-8881
Mostafa KabiriTranslational Models, Sanofi , Frankurt , Germany.
Abdullah KandiraTranslational Models, Sanofi , Frankurt , Germany.ORCID 0000-0001-9822-6136
Katarina RadoševićBiologics Research, Sanofi , Vitry-Sur-Seine , France.ORCID 0000-0002-6769-8402
Huawei QiuBiologics Research, Sanofi , Framingham , MA , USA.
Sanofi (France) · FRSanofi (Germany) · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The neonatal Fc receptor (FcRn) promotes antibody recycling through rescue from normal lysosomal degradation. The binding interaction is pH-dependent with high affinity at low pH, but not under physiological pH conditions. Here, we combined rational design and saturation mutagenesis to generate novel antibody variants with prolonged half-life and acceptable development profiles. First, a panel of saturation point mutations was created at 11 key FcRn-interacting sites on the Fc region of an antibody. Multiple variants with slower FcRn dissociation kinetics than the wildtype (WT) antibody at pH 6.0 were successfully identified. The mutations were further combined and characterized for pH-dependent FcRn binding properties, thermal stability and the FcγRIIIa and rheumatoid factor binding. The most promising variants, YD (M252Y/T256D), DQ (T256D/T307Q) and DW (T256D/T307W), exhibited significantly improved binding to FcRn at pH 6.0 and retained similar binding properties as WT at pH 7.4. The pharmacokinetics in human FcRn transgenic mice and cynomolgus monkeys demonstrated that these properties translated to significantly prolonged plasma elimination half-life compared to the WT control. The novel variants exhibited thermal stability and binding to FcγRIIIa in the range comparable to clinically validated YTE and LS variants, and showed no enhanced binding to rheumatoid factor compared to the WT control. These engineered Fc mutants are promising new variants that are widely applicable to therapeutic antibodies, to extend their circulation half-life with obvious benefits of increased efficacy, and reduced dose and administration frequency.

Indexed as

AnimalsBioengineeringBlood CirculationHalf-LifeHistocompatibility Antigens Class IHumansHydrogen-Ion ConcentrationMacaca fascicularisMiceMice, TransgenicMutagenesis, Site-DirectedProtein BindingProtein ConformationProtein StabilityProteolysisReceptors, FcFCGR3A protein, humanFc receptor, neonatalHistocompatibility Antigens Class IReceptors, FcReceptors, IgGRheumatoid FactorFcRnFcγRIgG antibodiesmutagenesisneonatal Fc receptorpH dependenceserum half-life

Identifiers

PMID31216930
PMCPMC6748615
OpenAlexW2951311588

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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.