Induction of macrophage inflammatory cytokines by Ox-LDL is ABCA1 dependent

Objective The current study aimed to evaluate whether the induction of macrophage inflammatory cytokines by Ox-LDL is related to the expression of ABCA 1 pathway. Methods After THP 1/PMA macrophages were transfected with ABCA1 antisense oligonucleotides （100nmol/L） followed by treatment with Ox-LDL （30mg/L）, the expressions of ABCA1, ICAM-1 and MCP-1 mRNA and protein were determined by real-time fluorescent quantitative RT-PCR, Western blot or ELISA. Results Ox-LDL induced expressions of ABCA1, ICAM-1, and MCP-1 at both mRNA and protein levels from THPI/PMA macrophages. Transfection with ABCAI antisense oligonucleotides reduced ABCA1 mRNA levels after 3 and 6 hours and protein levels after 12 and 24 hours. The expression of ICAM-1 and MCP-1 induced by Ox-LDL was also decreased after inhibition of ABCA 1 protein expression by ABCA 1 antisense oligonucleotide decreased. Conclusion The induction of macrophage inflammatory cytokines by Ox-LDL is partially dependent on expression ofABCA1. Our studies disclose new functions of ABCA1 in macrophages Objective The current study aimed to evaluate whether the induction of macrophage inflammatory eytokines by Ox-LDL is related to the expression of ABCA 1 pathway. Methods After THP 1/PMA macrophages were transfected with ABCA1 antisense oligonucleotides （100nmol/L） followed by treatment with Ox-LDL （30mg/L）, the expressions of ABCA1, ICAM-1 and MCP-1 mRNA and protein were determined by real-time fluorescent quantitative RT-PCR, Western blot or ELISA. Results Ox-LDL induced expressions of ABCA1, ICAM-1, and MCP-1 at both mRNA and protein levels from THPI/PMA macrophages. Transfection with ABCAI antisense oligonucleotides reduced ABCA1 mRNA levels after 3 and 6 hours and protein levels after 12 and 24 hours. The expression of ICAM-1 and MCP-1 induced by Ox-LDL was also decreased after inhibition of ABCA 1 protein expression by ABCA 1 antisense oligonucleotide decreased. Conclusion The induction of macrophage inflammatory cytokines by Ox-LDL is partially dependent on expression ofABCA1. Our studies disclose new functions of ABCA1 in macrophages

非他汀类药物在家族性高胆固醇血症的研究新进展

家族性高胆固醇血症是一种常见的遗传性疾病,为心血管事件发生的高危因素之一,但是目前常用的他汀类及依折麦布等仍不能使家族性高胆固醇血症患者达到目标低密度脂蛋白水平。因此,开发新一代降脂药物具有重要的临床价值。本文对目前正在研发的7种新的降脂药物,包括酰基辅酶A-胆固醇酰基转移酶(ACAT)抑制剂、三酰甘油转运蛋白(MTP)抑制剂、反义寡核苷酸、胆固醇转运蛋白(CETP)抑制剂、前蛋白转化酶枯草杆菌蛋白酶kexin-9(PCSK9)抑制剂、甲状腺受体激动剂和角鲨烯合成酶抑制剂进行综述。