安徽医药
安徽醫藥
안휘의약
ANHUI MEDICAL AND PHARMACEUTICAL JOURNAL
2015年
5期
855-857
,共3页
雷蕾%张智燕%周志斌%彭军%姜丹
雷蕾%張智燕%週誌斌%彭軍%薑丹
뢰뢰%장지연%주지빈%팽군%강단
溶血磷脂酸%THP-1 细胞%Toll样,受体4单克隆抗体核因子-κB
溶血燐脂痠%THP-1 細胞%Toll樣,受體4單剋隆抗體覈因子-κB
용혈린지산%THP-1 세포%Toll양,수체4단극륭항체핵인자-κB
lysophosphatidic acid%THP-1 cells%TLR4 monoclonal antibody,nuclear factor-κB
目的:通过拮抗Toll样受体4(TLR4)观察其对于溶血磷脂酸(lysophosphatidic acid,LPA)诱导的人单核细胞株THP-1细胞的核因子-κB(nuclear factor-kappaB,NF-κB)p65表达的影响以及肿瘤坏死因子-α(TNF-α)水平的变化。方法取THP-1细胞,LPA以不同浓度水平(0~10μmol·L-1)刺激4 h,或1μmol·L-1浓度刺激不同时间(0~8 h),酶联免疫吸附法(ELISA)测定细胞因子TNF-α,随后在LPA (1μmol·L-1)条件下分别予不同浓度TLR4单克隆抗体(TLR4 mAb)(5,20,30 mg·L-1)干预THP-1细胞,观察其对LPA诱导的核蛋白NF-κB p65表达及TNF-α分泌水平的影响。结果 LPA以剂量依赖方式促进TNF-α分泌,并可诱导THP-1细胞NF-κB p65活化,予TLR4 mAb阻断TLR4后,可显著抑制NF-κB p65表达及TNF-α分泌。结论 LPA可经由Toll4/NF-κB信号途径激活单核细胞,最终引起TNF-α等炎性因子的分泌,参与动脉粥样硬化进程。
目的:通過拮抗Toll樣受體4(TLR4)觀察其對于溶血燐脂痠(lysophosphatidic acid,LPA)誘導的人單覈細胞株THP-1細胞的覈因子-κB(nuclear factor-kappaB,NF-κB)p65錶達的影響以及腫瘤壞死因子-α(TNF-α)水平的變化。方法取THP-1細胞,LPA以不同濃度水平(0~10μmol·L-1)刺激4 h,或1μmol·L-1濃度刺激不同時間(0~8 h),酶聯免疫吸附法(ELISA)測定細胞因子TNF-α,隨後在LPA (1μmol·L-1)條件下分彆予不同濃度TLR4單剋隆抗體(TLR4 mAb)(5,20,30 mg·L-1)榦預THP-1細胞,觀察其對LPA誘導的覈蛋白NF-κB p65錶達及TNF-α分泌水平的影響。結果 LPA以劑量依賴方式促進TNF-α分泌,併可誘導THP-1細胞NF-κB p65活化,予TLR4 mAb阻斷TLR4後,可顯著抑製NF-κB p65錶達及TNF-α分泌。結論 LPA可經由Toll4/NF-κB信號途徑激活單覈細胞,最終引起TNF-α等炎性因子的分泌,參與動脈粥樣硬化進程。
목적:통과길항Toll양수체4(TLR4)관찰기대우용혈린지산(lysophosphatidic acid,LPA)유도적인단핵세포주THP-1세포적핵인자-κB(nuclear factor-kappaB,NF-κB)p65표체적영향이급종류배사인자-α(TNF-α)수평적변화。방법취THP-1세포,LPA이불동농도수평(0~10μmol·L-1)자격4 h,혹1μmol·L-1농도자격불동시간(0~8 h),매련면역흡부법(ELISA)측정세포인자TNF-α,수후재LPA (1μmol·L-1)조건하분별여불동농도TLR4단극륭항체(TLR4 mAb)(5,20,30 mg·L-1)간예THP-1세포,관찰기대LPA유도적핵단백NF-κB p65표체급TNF-α분비수평적영향。결과 LPA이제량의뢰방식촉진TNF-α분비,병가유도THP-1세포NF-κB p65활화,여TLR4 mAb조단TLR4후,가현저억제NF-κB p65표체급TNF-α분비。결론 LPA가경유Toll4/NF-κB신호도경격활단핵세포,최종인기TNF-α등염성인자적분비,삼여동맥죽양경화진정。
Objective To observe the roles of Toll-like receptor 4 in the expression of nuclear factor-κB(NF-κB)p65 and the changes of cytokine TNF-αmediated by human monocytic THP-1 cell lines induced by lysophosphatidic acid (LPA)via antagonizing TLR4. Methods The human THP-1 cells were stimulated using different levels of LPA (0~10 μmol·L-1 )for 4h,or treated with LPA 1μmol·L-1 for different hours (0 ~8 h).The secretion of TNF-αwas detected using a sandwich ELISA,and then under LPA (1μmol·L-1 )condition,after the THP-1 cells were intervened using different levels of TLR4 mAb(5,20,30 mg·L-1 ),the effects on the expression levels of LPA-induced nucleoprotein NF-κB p65 and levels of secreted TNF-αwere observed.Results TNF-αsecre-tion in THP-1 cells was up-regulated by LPA in a dose-dependent way,and NF-κB p65 activation was also promoted.After TLR4 was blocked using TLR4 mAb,the expression of NF-κBp65 and secretion of TNF-αwere inhibited significantly.Conclusions The mono-cytic cell may be activated by LPA mediated by TLR4/N F-κB signaling pathway,ultimately up-regulates the secretion of proinflamma-tory cytokines such as TNF-α,thus involving in the pathological process in atherosclerosis.