"NVR3-778也在拼命的寻找蛛丝马迹,希望可以在抑制cccDNA形成"
只想补充,核心抑制剂高的期望.
Figure 3 depicts the potential contributions of NVR 3-778 to the functional cure of CHB infection through inhibition of the HBV Core dimer. The biological activities of HBV Core that are required for HBV persistence include:
Core dimer is the building block for assembly of the viral capsid. Core Inhibitors promote the formation of abnormal, dysfunctional viral capsids and thereby block production of infectious virus progeny.
The viral capsid can exit the hepatocyte or traffic back to the nucleus to replenish and maintain a stable number of cccDNA molecules. Core Inhibitors can also block cccDNA replenishment and contribute indirectly to inhibition of HBV replication.
Core binds the promoter regions of interferon stimulated genes (ISG) in the host chromosome to inhibit ISG expression and suppress the host innate immune response. Core Inhibitors that can induce ISG expression may restore the anti-HBV host innate immune response, leading to non-cytolytic clearance of infected hepatocytes.
Core binds cccDNA and maintains the mini-chromosome in a transcriptionally active state, thus allowing continuous production of new virus. Core Inhibitors that can prevent binding of Core to cccDNA will silence the cccDNA mini-chromosome. Silencing of cccDNA can prevent production of virus progeny and may restore host anti-HBV immune response.
Core Inhibitors have the potential to inhibit all of these activities. Complete suppression of infectious virus production and restoration of host innate immune response could lead to enhanced elimination of infected hepatocytes and, thus, greater functional cure rates in patients with chronic infection.
OCB-030 is an orally available, sangamide-based, second generation cyclophilin inhibitor with a well-differentiated preclinical profile when compared to other cyclophilin inhibitors. Data presented in April at The International Liver Congress™ 2014, the annual meeting of the European Association for the Study of the Liver (EASL), indicated that OCB-030 may inhibit the hepatitis B virus by two mechanisms in vitro. First, the data indicated that OCB-030 directly inhibits several stages of viral replication in liver cells. Second, the data indicated that OCB-030 may act indirectly by strengthening the host immune response via IRFs, including potent inhibition of an interaction between cyclophilin A and IRF9, a key component of the Jak/Stat pathway. Data also indicated that the risk of developing resistance, a significant clinical problem with current therapies for hepatitis B, is very low with OCB-030.
OCB-030是一种口服用,sangamide为主,第二代环素抑制剂与分化良好的临床前轮廓相对于其他亲环蛋白抑制剂。在国际肝病会议™2014年,欧洲协会为肝脏(EASL)的研究年会上介绍了4月份的数据,表明OCB-030可通过体外两种机制抑制乙肝病毒。首先,数据表明,OCB-030直接抑制病毒复制的数个阶段中的肝细胞。第二,该数据表明,OCB-030可间接通过加强通过脉冲响应函数的宿主免疫反应,包括亲环素A和IRF9的JAK / STAT途径的一个关键组成部分之间的相互作用的强效抑制起作用。数据还表明,显影性的危险,一显著临床问题与目前的治疗方法为乙型肝炎,是非常低的与OCB-030。
由于cyclophilin inhibito目标是宿主,副作用的危险因素.
OCB-030我还没有做完深入的调研,说它完全是免疫调节剂可能有点草率。官网的说法是1. contribute to immune system stimulation,也就是免疫调节剂了。2. In addition to its immunomodulatory properties, OCB-030 had direct-acting antiviral characteristics in preclinical studies。这里我不特别理解的是,作为宿主蛋白的特异性抑制剂,是如何作为DAA直接抑制病毒复制的。不清楚是表述的问题还是另有蹊跷,有点意思。