2. Academic Validation
  3. Polysaccharide enhanced NK cell cytotoxicity against pancreatic cancer via TLR4/MAPKs/NF-κB pathway in vitro/vivo

Polysaccharide enhanced NK cell cytotoxicity against pancreatic cancer via TLR4/MAPKs/NF-κB pathway in vitro/vivo

  • Carbohydr Polym. 2019 Dec 1;225:115223. doi: 10.1016/j.carbpol.2019.115223.
Xin Xie 1,  Lingman Ma 1,  Yiran Zhou 2,  Wen Shen 1,  Duiyue Xu 1,  Jie Dou 1,  Baiyong Shen 3,  Changlin Zhou 4
Affiliations

Affiliations

  • 1 School of Life Science and Technology, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing, Jiangsu, 210009, PR China.
  • 2 Department of General Surgery, Rui Jin Hospital, Research Institute of Pancreatic Diseases, School of Medicine, Shanghai JiaoTong University, Shanghai, 200025, PR China.
  • 3 Department of General Surgery, Rui Jin Hospital, Research Institute of Pancreatic Diseases, School of Medicine, Shanghai JiaoTong University, Shanghai, 200025, PR China. Electronic address: shenby@shsmu.edu.cn.
  • 4 School of Life Science and Technology, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing, Jiangsu, 210009, PR China. Electronic address: cl_zhou@cpu.edu.cn.
PMID: 31521276 DOI: 10.1016/j.carbpol.2019.115223
Abstract

A polysaccharide isolated from Strongylocentrotus nudus eggs (SEP) reportedly displays immune activity in vivo. Here, its effect and underlying mechanism in the treatment of pancreatic Cancer were investigated. SEP obviously inhibited pancreatic Cancer growth by activating NK cells in vitro/vivo via TLR4/MAPKs/NF-κB signaling pathway, The tumor inhibitory rate achieved to 44.5% and 50.8% at a dose of 40 mg/kg in Bxpc-3 and SW1990 nude mice, respectively. Moreover, SEP obviously augmented the Gemcitabine (GEM) antitumor effect by upregulating NKG2D, which improved the sensitivity of NK cells targeting to its ligand MICA; meanwhile, the antitumor inhibitory rate was 68.6% in BxPC-3 tumor-bearing mice. Moreover, SEP reversed GEM-induced Apoptosis and atrophy in both spleen and bone marrow via suppressing ROS secretion in vivo. These results suggested that pancreatic Cancer was effectively inhibited by SEP-enhanced NK cytotoxicity mediated primarily through TLR4/MAPKs/NF-κB signaling pathway, representing a potential immunotherapy candidate for the treatment of pancreatic Cancer.

Keywords

Antitumor activity; NK cell activation; Pancreatic cancer; SEP; TLR4.

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