Reviving immunogenic cell death upon targeting TACC3 enhances T-DM1 response in HER2-positive breast cancer

Immunogenic cell death (ICD), an immune-priming form of cell death, has been shown to be induced by several different anti-cancer therapies. Despite being the first and one of the most successful antibody-drug conjugates (ADCs) approved for refractory HER2-positive breast cancer, little is known if response and resistance to trastuzumab emtansine (T-DM1) involves ICD modulation that can be leveraged to enhance T-DM1 response. Here, we report that T-DM1 induces spindle assembly checkpoint (SAC)-dependent ICD in sensitive cells by inducing eIF2α phosphorylation, surface exposure of calreticulin, ATP and HMGB1 release, and secretion of ICD-related cytokines, all of which are lost in resistance. Accordingly, an ICD-related gene signature correlates with clinical response to T-DM1-containing therapy. We found that transforming acidic coiled-coil containing 3 (TACC3) is overexpressed in T-DM1 resistant cells, and that T-DM1 responsive patients have reduced TACC3 protein while the non-responders exhibited increased TACC3 expression during T-DM1 treatment. Notably, genetic or pharmacological inhibition of TACC3 revives T-DM1-induced SAC activation and induction of ICD markers in vitro. Finally, TACC3 inhibition elicits ICD in vivo shown by vaccination assay, and it potentiates T-DM1 by inducing dendritic cell (DC) maturation and enhancing infiltration of cytotoxic T cells in the human HER2-overexpressing MMTV.f.huHER2#5 (Fo5) transgenic model. Together, our results show that ICD is a key mechanism of action of T-DM1 which is lost in resistance, and that targeting TACC3 restores T-DM1-mediated ICD and overcomes resistance.

Errataetall:

UpdateIn: Cancer Res. 2024 Feb 6;:. - PMID 38319231

Medienart:

E-Artikel

Erscheinungsjahr:

2023

Erschienen:

2023

Enthalten in:

Zur Gesamtaufnahme - year:2023

Enthalten in:

bioRxiv : the preprint server for biology - (2023) vom: 14. Sept.

Sprache:

Englisch

Beteiligte Personen:

Gedik, Mustafa Emre [VerfasserIn]
Saatci, Ozge [VerfasserIn]
Oberholtzer, Nathaniel [VerfasserIn]
Uner, Meral [VerfasserIn]
Akbulut, Ozge [VerfasserIn]
Cetin, Metin [VerfasserIn]
Aras, Mertkaya [VerfasserIn]
Ibis, Kubra [VerfasserIn]
Caliskan, Burcu [VerfasserIn]
Banoglu, Erden [VerfasserIn]
Wiemann, Stefan [VerfasserIn]
Uner, Aysegul [VerfasserIn]
Aksoy, Sercan [VerfasserIn]
Mehrotra, Shikhar [VerfasserIn]
Sahin, Ozgur [VerfasserIn]

Links:

Volltext

Themen:

Antibody drug conjugate
Breast cancer
Drug resistance
Immunologic cell death
Mitotic arrest
Preprint
T-DM1
TACC3

Anmerkungen:

Date Revised 21.02.2024

published: Electronic

UpdateIn: Cancer Res. 2024 Feb 6;:. - PMID 38319231

Citation Status PubMed-not-MEDLINE

doi:

10.1101/2023.09.12.557273

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM362418187