Volume 132, Issue 35 pp. 15226-15230
Zuschrift

A Novel d-Peptide Identified by Mirror-Image Phage Display Blocks TIGIT/PVR for Cancer Immunotherapy

Xiuman Zhou

Xiuman Zhou

School of Life Sciences, Zhengzhou University, Zhengzhou, 450001 China

These authors contributed equally to this work.

Search for more papers by this author
Chao Zuo

Chao Zuo

Tsinghua-Peking Center for Life Sciences, Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing, 100084 China

These authors contributed equally to this work.

Search for more papers by this author
Wanqiong Li

Wanqiong Li

School of Pharmaceutical Sciences (Shenzhen), Sun Yat-sen University, Shenzhen, 518107 China

Search for more papers by this author
Weiwei Shi

Weiwei Shi

Tsinghua-Peking Center for Life Sciences, Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing, 100084 China

Search for more papers by this author
Xiaowen Zhou

Xiaowen Zhou

School of Life Sciences, Zhengzhou University, Zhengzhou, 450001 China

Search for more papers by this author
Hongfei Wang

Hongfei Wang

School of Life Sciences, Zhengzhou University, Zhengzhou, 450001 China

Search for more papers by this author
Shaomeng Chen

Shaomeng Chen

School of Pharmaceutical Sciences (Shenzhen), Sun Yat-sen University, Shenzhen, 518107 China

Search for more papers by this author
Jiangfeng Du

Jiangfeng Du

School of Life Sciences, Zhengzhou University, Zhengzhou, 450001 China

Search for more papers by this author
Guanyu Chen

Guanyu Chen

School of Pharmaceutical Sciences (Shenzhen), Sun Yat-sen University, Shenzhen, 518107 China

Search for more papers by this author
Wenjie Zhai

Wenjie Zhai

School of Life Sciences, Zhengzhou University, Zhengzhou, 450001 China

Search for more papers by this author
Wenshan Zhao

Wenshan Zhao

School of Life Sciences, Zhengzhou University, Zhengzhou, 450001 China

Search for more papers by this author
Yahong Wu

Yahong Wu

School of Life Sciences, Zhengzhou University, Zhengzhou, 450001 China

Search for more papers by this author
Prof. Yuanming Qi

Prof. Yuanming Qi

School of Life Sciences, Zhengzhou University, Zhengzhou, 450001 China

Search for more papers by this author
Prof. Lei Liu

Corresponding Author

Prof. Lei Liu

Tsinghua-Peking Center for Life Sciences, Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing, 100084 China

Search for more papers by this author
Prof. Yanfeng Gao

Corresponding Author

Prof. Yanfeng Gao

School of Life Sciences, Zhengzhou University, Zhengzhou, 450001 China

School of Pharmaceutical Sciences (Shenzhen), Sun Yat-sen University, Shenzhen, 518107 China

Search for more papers by this author
First published: 09 May 2020
Citations: 3

Abstract

The low response rate and adaptive resistance of PD-1/PD-L1 blockade demands the studies on novel therapeutic targets for cancer immunotherapy. We discovered that a novel immune checkpoint TIGIT expressed higher than PD-1 in many tumors especially anti-PD-1 resistant tumors. Here, mirror-image phage display bio-panning was performed using the d-enantiomer of TIGIT synthesized by hydrazide-based native chemical ligation. d-peptide DTBP-3 was identified, which could occupy the binding interface and effectively block the interaction of TIGIT with its ligand PVR. DTBP-3 showed proteolytic resistance, tumor tissue penetrating ability, and significant tumor suppressing effects in a CD8+ T cell dependent manner. More importantly, DTBP-3 could inhibit tumor growth and metastasis in anti-PD-1 resistant tumor model. This is the first d-peptide targeting TIGIT, which could serve as a potential candidate for cancer immunotherapy.

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