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Antibodies
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Emerging Antibody Engineering Strategies and Applications for Immunotherapy of Cancer
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Emerging Antibody Engineering Strategies and Applications for Immunotherapy of Cancer

A special issue of Antibodies (ISSN 2073-4468). This special issue belongs to the section "Antibody-Based Therapeutics".

Deadline for manuscript submissions: 31 December 2024 | Viewed by 6695

Special Issue Editors

Dr. Christian Klein

E-Mail Website
Guest Editor
Roche Pharma Research & Early Development, Roche Innovation Center Zurich, Schlieren, Switzerland
Interests: immunotherapy of cancer; bispecific antibodies; T cell bispecific antibodies
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Sophia Karagiannis

E-Mail Website
Guest Editor
Translational Cancer Immunology and Immunotherapy, St. John’s Institute of Dermatology, School of Basic & Medical Biosciences, King's College London, London SE1 9RT, UK
Interests: B cell responses in cancer; antibody engineering and glycoengineering; IgE class of antibodies in cancer; antibody Fc-mediated functions in cancer; cancer immunology; cancer immunotherapy; antibody-drug conjugates; melanoma; ovarian cancer; breast cancer; allergo-oncology; ADCC; ADCP; macrophages; monocytes; NK cells
Special Issues, Collections and Topics in MDPI journals
Dr. Ann White

E-Mail Website1 Website2
Guest Editor
Department of Translational Science, UCB Pharma, 208 Bath Road, Slough SL1 3WE, UK
Interests: immunotherapy; therapeutic antibodies; antibody isotypes; antibody engineering; T-cells; myeloid cells; NK cells; B cells; cancer immunology
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

In the past decade, cancer immunotherapy has revolutionized the treatment of hematological and solid tumors, resulting in the approval of checkpoint inhibitory antibodies, CAR-T cell therapies, and T cells engaging bispecific antibodies. Despite this progress, the lack of response and/or relapse and subsequent resistance to immunotherapy remain major clinical challenges requiring the development of optimized therapeutic agents and novel principles for targeting cancer. For this purpose, the application of state-of-the-art antibody engineering continues to play a key role. This Special Issue is intended to cover recent progress and novel concepts in the engineering of innovative antibody-based immunotherapies, including engineered checkpoint inhibitors, bispecific antibodies, immunocytokines, next-generation biologies, and engineered adoptive T cell therapy approaches.

Dr. Christian Klein
Prof. Dr. Sophia Karagiannis
Dr. Ann White
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Antibodies is an international peer-reviewed open access quarterly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1800 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • mAb
  • bsAb
  • CPI
  • TCE
  • CPI
  • CAR-T

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Related Special Issue

Published Papers (4 papers)

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14 pages, 3179 KiB  
Article
A Novel Tetravalent Bispecific Immune Cell Engager Activates Natural Killer Cells to Kill Cancer Cells without Mediating Fratricide
by Ge Yang, Shahryar Khoshtinat Nikkhoi, Hajar Owji, Geng Li, Mohammad Massumi, Jessica Cervelli, Venu Gopal Vandavasi and Arash Hatefi
Antibodies 2024, 13(3), 75; https://doi.org/10.3390/antib13030075 - 10 Sep 2024
Viewed by 1263
Abstract
We previously reported the structure, affinity, and anticancer activity of a bivalent bispecific natural killer cell engager (BiKE) composed of one anti-CD16a VHH and one anti-HER2 VHH fused via a linker. In this study, we explored the engineering of a tetravalent BiKE by [...] Read more.
We previously reported the structure, affinity, and anticancer activity of a bivalent bispecific natural killer cell engager (BiKE) composed of one anti-CD16a VHH and one anti-HER2 VHH fused via a linker. In this study, we explored the engineering of a tetravalent BiKE by fusing two anti-CD16a and two anti-HER2 VHHs in tandem, using bivalent BiKE as a template. The tetravalent BiKE was genetically engineered, and its tertiary structure was predicted using in silico modeling. The antigen binding and affinity of the tetravalent BiKE were assessed using ELISA, flow cytometry, and biolayer interferometry. The ability of the BiKEs to kill cancer cells was evaluated through classical and residual antibody-dependent cellular cytotoxicity (ADCC) assays. Additionally, we investigated the potential for NK cell fratricide via CD16a-CD16a crosslinking. Our results revealed that the tetravalent BiKE exhibited at least 100-fold higher affinity toward its target antigens compared to its bivalent counterpart. The residual ADCC assay indicated that the tetravalent BiKE was more effective in killing cancer cells than the bivalent BiKE, attributable to its lower Koff value, which prolonged its binding to NK cell surfaces. Fratricide assays demonstrated that neither the bivalent nor the tetravalent BiKE mediated fratricide. Notably, our findings showed that daratumumab-induced NK fratricide was restricted to CD38-CD38 crosslinking and was not related to ADCC via CD16a-CD38 crosslinking. This study is the first in the literature to show the successful engineering of a tetravalent immune cell engager composed of tandem VHH units, which achieves high affinity and anticancer activity without mediating fratricide. Full article
(This article belongs to the Special Issue Emerging Antibody Engineering Strategies and Applications for Immunotherapy of Cancer)
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25 pages, 4197 KiB  
Article
NK Cytotoxicity Mediated by NK-92 Cell Lines Expressing Combinations of Two Allelic Variants for FCGR3
by Marta Freitas Monteiro, Maria Papaserafeim, Matteo Andreani, Aline Réal, Athanasios Kouklas, Daniela Reis Galvão, Jörg D. Seebach and Gisella L. Puga Yung
Antibodies 2024, 13(3), 55; https://doi.org/10.3390/antib13030055 - 12 Jul 2024
Viewed by 1340
Abstract
Natural killer (NK) cells play an important role in the surveillance of viral infections and cancer. NK cell antibody-dependent cellular cytotoxicity (ADCC) and direct cytotoxicity are mediated by the recognition of antibody-coated target cells through the Fc gamma receptor IIIA (FcγRIIIa/CD16) and by [...] Read more.
Natural killer (NK) cells play an important role in the surveillance of viral infections and cancer. NK cell antibody-dependent cellular cytotoxicity (ADCC) and direct cytotoxicity are mediated by the recognition of antibody-coated target cells through the Fc gamma receptor IIIA (FcγRIIIa/CD16) and by ligands of activating/inhibitory NK receptors, respectively. Allelic variants of the FCGR3A gene include the high-affinity single-nucleotide polymorphism (SNP) rs396991 (V176F), which is associated with the efficacy of monoclonal antibody (mAb) therapies, and the SNP rs10127939 (L66H/R). The contribution of FCGR3A SNPs to NK cell effector functions remains controversial; therefore, we generated a panel of eight NK-92 cell lines expressing specific combinations of these SNPs and tested their cytotoxicities. NK-92 cells were stably transfected with plasmids containing different combinations of FCGR3A SNPs. Messenger RNA and FcγRIIIa/CD16 cell surface expressions were detected using new generation sequencing (NGS) and flow cytometry, respectively. All FcγRIIIa/CD16-transfected NK-92 cell lines exhibited robust ADCC against three different target cell lines with minor differences. In addition, enhanced direct NK cytotoxicity against K562 target cells was observed, suggesting a mechanistic role of FcγRIIIa/CD16 in direct NK cytotoxicity. In conclusion, we generated eight FcγRIIIa/CD16-transfected NK-92 cell lines carrying different combinations of two of the most studied FCGR3A SNPs, representing the major genotypes described in the European population. The functional characterization of these cell lines revealed differences in ADCC and direct NK cytotoxicity that may have implications for the design of adoptive cancer immunotherapies using NK cells and tumor antigen-directed mAbs. Full article
(This article belongs to the Special Issue Emerging Antibody Engineering Strategies and Applications for Immunotherapy of Cancer)
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15 pages, 8868 KiB  
Article
177Lu Anti-Angiogenic Radioimmunotherapy Targeting ATP Synthase in Gastric Cancer Model
by Bok-Nam Park, Young-Sil An, Su-Min Kim, Su-Jin Lee, Yong-Jin Park and Joon-Kee Yoon
Antibodies 2024, 13(3), 51; https://doi.org/10.3390/antib13030051 - 27 Jun 2024
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Abstract
This study investigated a novel radioimmunotherapy strategy for targeting tumor angiogenesis. We developed a radiopharmaceutical complex by labeling an anti-adenosine triphosphate synthase (ATPS) monoclonal antibody (mAb) with the radioisotope 177Lu using DOTA as a chelating agent. 177Lu-DOTA-ATPS mAb demonstrated high labeling [...] Read more.
This study investigated a novel radioimmunotherapy strategy for targeting tumor angiogenesis. We developed a radiopharmaceutical complex by labeling an anti-adenosine triphosphate synthase (ATPS) monoclonal antibody (mAb) with the radioisotope 177Lu using DOTA as a chelating agent. 177Lu-DOTA-ATPS mAb demonstrated high labeling efficiency (99.0%) and stability in serum. MKN-45 cancer cells exhibited the highest cellular uptake, which could be specifically blocked by unlabeled ATPS mAb. In mice, 177Lu-DOTA-ATPS mAb accumulated significantly in tumors, with a tumor uptake of 16.0 ± 1.5%ID/g on day 7. 177Lu-DOTA-ATPS mAb treatment significantly reduced the viability of MKN-45 cells in a dose-dependent manner. In a xenograft tumor model, this radioimmunotherapy strategy led to substantial tumor growth inhibition (82.8%). Furthermore, combining 177Lu-DOTA-ATPS mAb with sunitinib, an anti-angiogenic drug, enhanced the therapeutic efficacy of sunitinib in the mouse model. Our study successfully developed 177Lu-DOTA-ATPS mAb, a radioimmunotherapy agent targeting tumor blood vessels. This approach demonstrates significant promise for inhibiting tumor growth, both as a single therapy and in combination with other anti-cancer drugs. Full article
(This article belongs to the Special Issue Emerging Antibody Engineering Strategies and Applications for Immunotherapy of Cancer)
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13 pages, 1414 KiB  
Brief Report
Characterization of a Trispecific PD-L1 Blocking Antibody That Exhibits EGFR-Conditional 4-1BB Agonist Activity
by Laura Rubio-Pérez, Susana Frago, Marta Compte, Rocío Navarro, Seandean L. Harwood, Rodrigo Lázaro-Gorines, Marina Gómez-Rosel, Oana Hangiu, Noelia Silva-Pilipich, Lucía Vanrell, Cristian Smerdou and Luis Álvarez-Vallina
Antibodies 2024, 13(2), 34; https://doi.org/10.3390/antib13020034 - 24 Apr 2024
Viewed by 2335
Abstract
Immune checkpoint blockade has changed the treatment paradigm for advanced solid tumors, but the overall response rates are still limited. The combination of checkpoint blockade with anti-4-1BB antibodies to stimulate tumor-infiltrating T cells has shown anti-tumor activity in human trials. However, the further [...] Read more.
Immune checkpoint blockade has changed the treatment paradigm for advanced solid tumors, but the overall response rates are still limited. The combination of checkpoint blockade with anti-4-1BB antibodies to stimulate tumor-infiltrating T cells has shown anti-tumor activity in human trials. However, the further clinical development of these antibodies has been hampered by significant off-tumor toxicities. Here, we generated an anti-4-1BB/EGFR/PD-L1 trispecific antibody consisting of a triple-targeting tandem trimerbody (TT) fused to an engineered silent Fc region. This antibody (IgTT-4E1-S) was designed to combine the blockade of the PD-L1/PD-1 axis with conditional 4-1BB costimulation specifically confined to the tumor microenvironment (TME). The antibody demonstrated simultaneous binding to purified EGFR, PD-L1, and 4-1BB in solution, effective blockade of the PD-L1/PD1 interaction, and potent 4-1BB-mediated costimulation, but only in the presence of EGFR-expressing cells. These results demonstrate the feasibility of IgTT-4E1-S specifically blocking the PD-L1/PD-1 axis and inducing EGFR-conditional 4-1BB agonist activity. Full article
(This article belongs to the Special Issue Emerging Antibody Engineering Strategies and Applications for Immunotherapy of Cancer)
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Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

Title: NK cytotoxicity displayed by NK-92 cell lines expressing combinations of two allelic variants for FCGR3
Author: Seebach
Highlights: • Eight NK-92 cell lines, each with specific FCGR3A SNP combinations, exhibited robust ADCC against diverse targets, with differences given by effector, antigen, and target cell array. • The data suggest the FcγRIIIa/CD16's involvement in direct NK cytotoxicity. • Implications for designing adoptive cancer immunotherapy with NK cells and tumor antigen-directed mAbs arise from these findings.

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