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NLRP3 Inflammasome Mediated Interleukin-1β Production in Cancer-Associated Fibroblast Contributes to ALA-PDT for Cutaneous Squamous Cell Carcinoma

Authors Nie S, Wang X, Wang H

Received 7 August 2019

Accepted for publication 11 November 2019

Published 11 December 2019 Volume 2019:11 Pages 10257—10267

DOI https://doi.org/10.2147/CMAR.S226356

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 2

Editor who approved publication: Dr Yong Teng


Shu Nie,1 Xiuli Wang,2 Hongwei Wang1

1Department of Dermatology, Huadong Hospital Affiliated to Fudan University, Shanghai 200040, People’s Republic of China; 2Institute of Photomedicine, Shanghai Skin Disease Hospital, Tongji University School of Medicine, Shanghai 200443, People’s Republic of China

Correspondence: Hongwei Wang
Department of Dermatology, Huadong Hospital Affiliated to Fudan University, Shanghai 200040, People’s Republic of China
Email hongweiwang2017@163.com
Xiuli Wang
Institute of Photomedicine, Shanghai Skin Disease Hospital, Tongji University School of Medicine, Shanghai 200443, People’s Republic of China
Email wangxiuli_1400023@tongji.edu.cn

Background: Long-term tumor control following PDT is a result of its direct effect on tumor and vasculature in combination with induction of inflammatory-reactions upregulating the immune system. When PDT induces necrosis of tumors and vascular system, an immune cascade can be initiated to release all kinds of cytokines including IL1β. This further leads to the activation of inflammatory-cells and hence death of tumor cells.
Methods: Ultraviolet irradiation was used to induce cSCC mice model, gene chip was used to screen inflammatory cytokines, qPCR, ELISA and implanted tumor mice model were used to verify the changes and important role of interleukin-1β, and WB preliminarily explored the production mechanism of interleukin-1β.
Results: Inflammatory cytokines and receptors transcript screening identify IL1r1 as the top4. After ALA-PDT, IL1r1 and IL1β increased in patients’ biopsies, principally in mesenchymal cells. In vivo, the inhibition of ALA-PDT on tumor growth of cutaneous squamous cell carcinoma (cSCC) mice in the group with intralesional injection of anti-IL1β mAb or caspase1-inhibitor was significantly weaker than the control groups. Furthermore, NLRP3-inflammasome and p-p65/p65 were elevated after ALA-PDT mediated IL1β production in cancer-associated-fibroblasts.
Discussion: By means of activating NLRP3-inflammasome with IL1β production in CAFs, PDT stimulates local acute-inflammatory-response, which further promotes PDT effect for cSCC.

Keywords: cancer-associated fibroblast, photodynamic therapy, interleukin-1β, NLRP3-inflammasome, squamous cell carcinoma

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