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논문 기본 정보

자료유형
학술저널
저자정보
Hyesook Lee (Pusan National University School of Medicine) Jung-Hwa Han (Pusan National University School of Medicine) Kangbin An (Pusan National University School of Medicine) Yun Jeong Kang (Pusan National University School of Medicine) Hyun Hwangbo (Dong-Eui University College of Korean Medicine) Ji Hye Heo (Donggang University) Byung Hyun Choi (Pusan National University Yangsan Hospital) Jae-Joon Kim (Pusan National University Yangsan Hospital) Seo Rin Kim (Pusan National University School of Medicine) Soo Yong Lee (Pusan National University Yangsan Hospital) Jin Hur (Pusan National University Yangsan Hospital)
저널정보
대한생화학·분자생물학회 BMB Reports BMB Reports 제56권 제6호
발행연도
2023.6
수록면
359 - 364 (6page)

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KAI1/CD82, a membrane tetraspanin protein, can prevent variouscancers and retinal disorders through its anti-angiogenicand anti-metastatic capacity. However, little is known about itsanti-inflammatory effect and molecular mechanism. Therefore,the present study aimed to inLPSvestigate effect of a recombinantprotein of the large extracellular domain of human KAI1(Gly 111-Leu 228, rhKAI1) on lipopolysaccharides (LPS)-stimulatedRAW264.7 macrophage-like cells and mouse bone marrow-derived macrophages (BMDM) and to identify its underlyingmechanism. Our data showed that rhKAI1 suppressedexpression levels of classically macrophages (M1) phenotyperelatedsurface markers F4/80+CD86+ in LPS-stimulated BMDMand RAW264.7 cells. In addition, LPS markedly increased mRNAexpression and release levels of pro-inflammatory cytokinesand mediators such as interleukin (IL)-1β, IL-6, tumor necrosisfactor-α, cyclooxygenase-2, nitric oxide and prostaglandin E2,whereas these increases were substantially down-regulated byrhKAI1. Furthermore, LPS strongly increased expression of NF-κBp65 in the nuclei and phosphorylation of ERK, JNK, and p38MAPK. However, nuclear translocation of NF-κB p65 and phosphorylationof JNK were greatly reversed in the presence ofrhKAI1. Especially, rhKAI1 markedly suppressed expression oftoll-like receptor (TLR4) and prevented binding of LPS withTLR4 through molecular docking predict analysis. Importantly,Glu 214 of rhKAI1 residue strongly interacted with Lys 360 ofTLR4 residue, with a binding distance of 2.9 Å. Taken together,these findings suggest that rhKAI1 has an anti-inflammatoryeffect on LPS-polarized macrophages by interacting withTLR4 and down-regulating the JNK/NF-κB signaling pathway.

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