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IONIS-PKKRx a Novel Antisense Inhibitor of Prekallikrein and Bradykinin Production

机译:Ionis-pkkrx新型反义抑制剂的前杏仁素和Bradykinin生产

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摘要

Kallikrein is the key contact system mediator responsible for the conversion of high-molecular-weight kininogen into the inflammatory vasodilator peptide bradykinin, a process regulated by C1-esterase inhibitor (C1-INH). In hereditary angioedema (HAE), genetic mutations result in deficient or dysfunctional C1-INH and dysregulation of the contact system leading to recurrent, sometimes fatal, angioedema attacks. IONIS-PKKRx is a second-generation 2 '-O-(2-methoxyethyl)-modified chimeric antisense oligonucleotide, designed to bind and selectively reduce prekallikrein (PKK) mRNA in the liver. IONIS-PKKRx demonstrated dose-dependent reduction of human prekallikrein hepatic mRNA and plasma protein in transgenic mice and dose- and time-dependent reductions of plasma PKK in Cynomolgus monkeys. Similar dose-dependent reductions of plasma PKK levels were observed in healthy human volunteers accompanied by decreases in bradykinin generation capacity with an acceptable safety and tolerability profile. These results highlight a novel and specific approach to target PKK for the treatment of HAE and other diseases involving contact system activation and overproduction of bradykinin.
机译:Kallikrein是关键接触系统调解员,负责高分子重量激素转化为炎性血管扩张肽Bradykinin,由C1-酯酶抑制剂(C1-INH)调节的方法。在遗传性血管血清(HAE)中,遗传突变导致缺陷或功能障碍C1-INH和接触系统的失调导致复发,有时致命,血管模型攻击。 Ionis-pkkrx是第二代2'-o-(2-甲氧基乙基)制型嵌合反义寡核苷酸,设计用于在肝脏中结合和选择性地减少肝脏前蛋白酶(PKK)mRNA。 IONIS-PKKRX证明了在转基因小鼠中的人前肝素肝脏mRNA和血浆蛋白的剂量依赖性还原,并在Cynomolgus猴中的血浆PKK剂量和时间依赖性减少。在健康的人志愿者中观察到类似剂量依赖性血浆PKK水平的血浆PKK水平的副词,伴随着Bradykinin发电能力的降低,具有可接受的安全性和可耐受性。这些结果突出了针对涉及接触系统激活和Bradykinin的过度生产的HAE和其他疾病的靶向PKK的新颖和特异性方法。

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