Sargassum fusiforme polysaccharide activates nuclear factor kappa-B (NF-κB) and induces cytokine production via Toll-like receptors.
This study was designed to investigate the mechanism of macrophage activation by the Sargassum fusiforme polysaccharide (SFPS). As a result, SFPS significantly enhanced cytokines and nitric oxide (NO) productions in peritoneal macrophages, and stimulated macrophages to produce the cytokines and NO through the induction of their genes expression. The pretreatment of peritoneal macrophages with special antibodies [Toll-like receptors (TLRs) antibody] significantly blocked SFPS-induced tumor necrosis factor alpha (TNF-α) and NO production. Furthermore, pyrrolidine dithiocarbamate (PDTC), a specific inhibitor of NF-κB, effectively suppressed SFPS-induced TNF-α and interleukin 1β (IL-1β) secretion in peritoneal macrophages, indicating that SFPS stimulated macrophages to produce cytokines through the NF-κB pathway and the result was further confirmed by the experiment of Western blotting (WB) and confocal laser scanning microscope (CLSM). Taken together, these results suggest that SFPS-mediated induction of cytokines and NO production in macrophages is mediated, at least in part, by TLRs/NF-κB signaling pathway.
Institute of Glycobiological Engineering/School of Laboratory Medicine & Life Science, Wenzhou Medical University, Wenzhou 325035, China; Key Laboratory of Laboratory Medicine, Ministry of Education of China, School of Laboratory Medicine & Life Science, Wenzhou Medical University, Wenzhou 325035, China. Electronic address: xmchen01@163.com.
Xiaoming
X
Chen
Institute of Glycobiological Engineering/School of Laboratory Medicine & Life Science, Wenzhou Medical University, Wenzhou 325035, China; Key Laboratory of Laboratory Medicine, Ministry of Education of China, School of Laboratory Medicine & Life Science, Wenzhou Medical University, Wenzhou 325035, China.
Guoqing
G
Yu
Institute of Glycobiological Engineering/School of Laboratory Medicine & Life Science, Wenzhou Medical University, Wenzhou 325035, China.
Sairong
S
Fan
Institute of Glycobiological Engineering/School of Laboratory Medicine & Life Science, Wenzhou Medical University, Wenzhou 325035, China; Key Laboratory of Laboratory Medicine, Ministry of Education of China, School of Laboratory Medicine & Life Science, Wenzhou Medical University, Wenzhou 325035, China.
Manman
M
Bian
Institute of Glycobiological Engineering/School of Laboratory Medicine & Life Science, Wenzhou Medical University, Wenzhou 325035, China; Key Laboratory of Laboratory Medicine, Ministry of Education of China, School of Laboratory Medicine & Life Science, Wenzhou Medical University, Wenzhou 325035, China.
Huijun
H
Ma
Institute of Glycobiological Engineering/School of Laboratory Medicine & Life Science, Wenzhou Medical University, Wenzhou 325035, China; Key Laboratory of Laboratory Medicine, Ministry of Education of China, School of Laboratory Medicine & Life Science, Wenzhou Medical University, Wenzhou 325035, China.
Jianxin
J
Lu
Institute of Glycobiological Engineering/School of Laboratory Medicine & Life Science, Wenzhou Medical University, Wenzhou 325035, China; Key Laboratory of Laboratory Medicine, Ministry of Education of China, School of Laboratory Medicine & Life Science, Wenzhou Medical University, Wenzhou 325035, China.
Liqin
L
Jin
D000818:Animals; D002478:Cells, Cultured; D016207:Cytokines / Q000096:biosynthesis*; D004305:Dose-Response Relationship, Drug; D008262:Macrophage Activation / Q000187:drug effects / Q000502:physiology; D017737:Macrophages, Peritoneal / Q000187:drug effects / Q000378:metabolism*; D016328:NF-kappa B / Q000096:biosynthesis*; D010936:Plant Extracts / Q000302:isolation & purification / Q000494:pharmacology; D011134:Polysaccharides / Q000302:isolation & purification / Q000494:pharmacology*; D051381:Rats; D017207:Rats, Sprague-Dawley; D044647:Sargassum; D051193:Toll-Like Receptors / Q000096:biosynthesis*
D016207:Cytokines; D016328:NF-kappa B; D010936:Plant Extracts; D011134:Polysaccharides; D051193:Toll-Like Receptors
Immunomodulatory; NF-κB; Polysaccharide; Sargassum fusiforme; Toll-like receptor