Correlation Engine 2.0
Clear Search sequence regions

Sizes of these terms reflect their relevance to your search.

Systemic administration of immune checkpoint blockade agents can activate the anticancer activity of immune cells; however, the response varies from patient to patient and presents potential off-target toxicities. Local administration of immune checkpoint inhibitors (ICIs) can maximize therapeutic efficacies while reducing side effects. This study demonstrates a minimally invasive strategy to locally deliver anti-programmed cell death protein 1 (anti-PD-1) with shear-thinning biomaterials (STBs). ICI can be injected into tumors when loaded in STBs (STB-ICI) composed of gelatin and silicate nanoplatelets (Laponite). The release of ICI from STB was mainly affected by the Laponite percentage in STBs and pH of the local microenvironment. Low Laponite content and acidic pH can induce ICI release. In a murine melanoma model, the injection of STB-ICI significantly reduced tumor growth and increased CD8+ T cell level in peripheral blood. STB-ICI also induced increased levels of tumor-infiltrating CD4+ helper T cells, CD8+ cytotoxic T cells, and tumor death. The STB-based minimally invasive strategy provides a simple and efficient approach to deliver ICIs locally.


Qingzhi Wu, Moyuan Qu, Han-Jun Kim, Xingwu Zhou, Xing Jiang, Yi Chen, Jixiang Zhu, Li Ren, Tyler Wolter, Heemin Kang, Chun Xu, Zhen Gu, Wujin Sun, Ali Khademhosseini. A Shear-Thinning Biomaterial-Mediated Immune Checkpoint Blockade. ACS applied materials & interfaces. 2022 Aug 10;14(31):35309-35318

Expand section icon Mesh Tags

Expand section icon Substances

PMID: 35913267

View Full Text