Volume 144, Issue 9 pp. 2266-2278
Tumor Immunology and Microenvironment

Anti-PD-1/PD-L1 therapy augments lenvatinib's efficacy by favorably altering the immune microenvironment of murine anaplastic thyroid cancer

Viswanath Gunda

Viswanath Gunda

Department of Surgery, Division of General and Gastrointestinal Surgery, Harvard Medical School, Massachusetts General Hospital, Wang Ambulatory Care Center, 460, 15 Parkman Street, Boston, MA

V.G. and B.G. contributed equally to this work.Search for more papers by this author
Benjamin Gigliotti

Benjamin Gigliotti

Department of Surgery, Division of General and Gastrointestinal Surgery, Harvard Medical School, Massachusetts General Hospital, Wang Ambulatory Care Center, 460, 15 Parkman Street, Boston, MA

V.G. and B.G. contributed equally to this work.Search for more papers by this author
Tameem Ashry

Tameem Ashry

Department of Surgery, Division of General and Gastrointestinal Surgery, Harvard Medical School, Massachusetts General Hospital, Wang Ambulatory Care Center, 460, 15 Parkman Street, Boston, MA

Search for more papers by this author
Dorothy Ndishabandi

Dorothy Ndishabandi

Department of Surgery, Division of General and Gastrointestinal Surgery, Harvard Medical School, Massachusetts General Hospital, Wang Ambulatory Care Center, 460, 15 Parkman Street, Boston, MA

Search for more papers by this author
Michael McCarthy

Michael McCarthy

Department of Surgery, Division of General and Gastrointestinal Surgery, Harvard Medical School, Massachusetts General Hospital, Wang Ambulatory Care Center, 460, 15 Parkman Street, Boston, MA

Search for more papers by this author
Zhiheng Zhou

Zhiheng Zhou

Department of Surgery, Division of General and Gastrointestinal Surgery, Harvard Medical School, Massachusetts General Hospital, Wang Ambulatory Care Center, 460, 15 Parkman Street, Boston, MA

Search for more papers by this author
Salma Amin

Salma Amin

Department of Surgery, Division of General and Gastrointestinal Surgery, Harvard Medical School, Massachusetts General Hospital, Wang Ambulatory Care Center, 460, 15 Parkman Street, Boston, MA

Search for more papers by this author
Kyu Eun Lee

Kyu Eun Lee

Department of Surgery, Division of General and Gastrointestinal Surgery, Harvard Medical School, Massachusetts General Hospital, Wang Ambulatory Care Center, 460, 15 Parkman Street, Boston, MA

Search for more papers by this author
Tabea Stork

Tabea Stork

Department of Surgery, Division of General and Gastrointestinal Surgery, Harvard Medical School, Massachusetts General Hospital, Wang Ambulatory Care Center, 460, 15 Parkman Street, Boston, MA

Search for more papers by this author
Lori Wirth

Lori Wirth

Department of Surgery, Division of General and Gastrointestinal Surgery, Harvard Medical School, Massachusetts General Hospital, Wang Ambulatory Care Center, 460, 15 Parkman Street, Boston, MA

Search for more papers by this author
Gordon J. Freeman

Gordon J. Freeman

Department of Surgery, Division of General and Gastrointestinal Surgery, Harvard Medical School, Massachusetts General Hospital, Wang Ambulatory Care Center, 460, 15 Parkman Street, Boston, MA

Search for more papers by this author
Alessandro Alessandrini

Alessandro Alessandrini

Department of Surgery, Division of General and Gastrointestinal Surgery, Harvard Medical School, Massachusetts General Hospital, Wang Ambulatory Care Center, 460, 15 Parkman Street, Boston, MA

Search for more papers by this author
Sareh Parangi

Corresponding Author

Sareh Parangi

Department of Surgery, Division of General and Gastrointestinal Surgery, Harvard Medical School, Massachusetts General Hospital, Wang Ambulatory Care Center, 460, 15 Parkman Street, Boston, MA

Correspondence to: Sareh Parangi, MD, Harvard Medical School, Massachusetts General Hospital, Department of Surgery, Division of General and Gastrointestinal Surgery, Wang Ambulatory Care Center 460, 15 Parkman Street, Boston, MA 02115, Tel.: 617-643-4806; Fax: 617-643-4802; E-mail: [email protected]Search for more papers by this author
First published: 04 December 2018
Citations: 90

Abstract

Patients with anaplastic thyroid cancer (ATC) have an extremely poor prognosis despite multimodal therapy with surgery and chemoradiation. Lenvatinib, a multi-targeted tyrosine kinase inhibitor, as well as checkpoint inhibitors targeting the programmed cell death pathway, have proven effective in some patients with advanced thyroid cancer. Combination of these therapies is a potential means to boost effectiveness and minimize treatment resistance in ATC. We utilized our novel immunocompetent murine model of orthotopic ATC to demonstrate that lenvatinib led to significant tumor shrinkage and increased survival, while combination therapy led to dramatic improvements in both. Lenvatinib monotherapy increased tumor-infiltrating macrophages, CD8+ T-cells, regulatory T-cells, and most notably, polymorphonuclear myeloid derived suppressor cells (PMN-MDSCs). While both combination therapies led to further increases in CD8+ T-cells, only the lenvatinib and anti-PD-1 combination decreased PMN-MDSCs. PMN-MDSC expansion was also seen in the blood of mice and one patient receiving lenvatinib therapy for ATC. RNA-Seq of the ATC cell line used in our mouse model demonstrated that lenvatinib has multifaceted effects on angiogenesis, response to hypoxia, the epithelial-to-mesenchymal transition, and on multiple pathways implicated in inflammation and host immunity. Combination of lenvatinib with anti-Gr-1 antibody ameliorated lenvatinib's expansion of MDSCs and significantly improved lenvatinib's anti-tumor effect. These data suggest that MDSCs play a negative role in ATC's response to lenvatinib and support future study of their role as a potential biomarker and treatment target.

Abstract

What's new?

Anaplastic thyroid cancer (ATC) is a rare malignancy that is notoriously aggressive. Fatality from ATC remains high, despite advances in multimodal therapy. Here, the authors investigated combination therapy employing tyrosine kinase inhibitors and checkpoint inhibitors as a novel treatment strategy in ATC. In a mouse model of orthotopic ATC, combined treatment with the tyrosine kinase inhibitor lenvatinib and an anti-PD-1/PD-L1 checkpoint inhibitor was found to dramatically reduce tumor volume and improve survival. While lenvatinib monotherapy was associated with increased tumor-infiltrating and circulating myeloid-derived suppressor cells (MDSCs), the depletion of MDSCs via combination therapy significantly augmented lenvatinib's effectiveness.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.