ARB-1467是Arbutus进展最快的在研药物,这是一种脂质纳米颗粒(LNP)配制的RNAi疗法,目标是三种HBV病毒基因组的保守区域。早期数据证实它可以抑制HBsAg水平。在欧洲的肝脏研究协会(European Association for the Study of the Liver, EASL)四月份的会议上,Arbutus公布了ARB-1467在2a期剂量递增试验中的18名患者的数据。13名患者的HBsAg减少0.5 log以上,其中6人减少1 log以上。该公司正在评估ARB-1467的第四组患者队列,以每两周一次的给药方式,维持一年。
▲Arbutus建立了治疗乙肝病毒作用机制的全面研发管线(图片来源:Arbutus官网)
AB-423是一种衣壳抑制剂(capsid inhibitor 1.0),正在临床1期试验,2期临床试验预计将于本年开始。去年11月,Arbutus公司在美国肝脏研究协会(American Association for the Study of Liver Diseases , AASLD)会议上提交的临床前资料显示,AB-423在体外抑制了病毒外壳形成HBV RNA,以及将RNA转化为cccDNA的能力。如果病毒装配了不正确的外壳,就可以延缓病毒复制。
Assembly的CMO Uri Lopatin博士提到,20世纪20年代中期,研究HCV的公司都不愿放弃干扰素,因为该领域普遍认为免疫系统需要被刺激,不通过免疫方法永远无法治愈丙肝。但事实证明,当正确的小分子能够到达肝脏,并将病毒破裂得足够久,病毒就可以完全清除。 “现在我们在HBV中看到完全相同的争论。”Assembly公司希望在10月份的AASLD会议上披露ABI-H0731的大量最新数据。
我们祝愿这些在研乙肝新药在临床试验中能取得积极成果,早日上市,帮助人类攻克乙肝这个顽疾!
参考资料:
[1] HOW FAR INDUSTRY IS FROM ASSEMBLING A FUNCTIONAL CURE IN HBV
[2] Arbutus, Johnson & Johnson, Replicor和Assembly Biosciences公司官网
[3] Capsid assembly modulator JNJ-56136379 prevents de novo infection of primary human hepatocytes with hepatitis B virus作者: 齐欢畅 时间: 2018-3-18 11:27
根据美国药品研究与制造(Pharmaceutical Research and Manufacturers of America,PhRMA),在这13年间,药物开发商已取消或终止101个阿尔茨海默症药物临床开发,仅有3种药物上市,但仅用于阿尔茨海默症症状的治疗。据PhRMA统计,从1998~2011年,阿尔茨海默症药物研发成功失败比仅为1:34
聚合物技术每年都有一次年会, NAP 是一种Oligonucleotide形式.
TIDES: Oligonucleotide and Peptide Therapeutics
May 7-10, 2018
Hynes Convention Center,
Boston, MA https://lifesciences.knect365.com/tides/
rep聚合物技术权威刊物上有论文吗?
Nucleic acid polymer REP 2139 and nucleos(t)ide analogues act synergistically against chronic hepadnaviral infection in vivo.
Quinet J, Jamard C, Burtin M, Lemasson M, Guerret S, Sureau C, Vaillant A, Cova L. Hepatology 2017 epub Dec 18 2017.
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Nucleic acid polymers are active against Hepatitis Delta Virus infection in vitro.
Beilstein F, Blanchet M, Vaillant A, Sureau C. Journal of Virology 2017 epub Dec 6 2017.
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Activity of nucleic acid polymers in rodent models of HBV infection.
Schöneweis K, Motter N, Roppert PL, Lu M, Wang B, Roehl I, Glebe D, Yang D, Morrey JD, Roggendorf M, Vaillant A. Antiviral Research 2017 epub Nov 8, 2017.
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Safety and efficacy of REP 2139 and pegylated interferon alfa-2a for treatment-naive patients with chronic hepatitis B virus and hepatitis D virus co-infection (REP 301 and REP 301-LTF): a non-randomised, open-label, phase 2 trial
Bazinet M, Pântea V, Cebotarescu V, Cojuhari L, Jimbei P, Albrecht J, Schmid P, Le Gal F, Gordien E, Krawczyk A, Mijočević H, Karimzadeh H, Roggendorf M, Vaillant A. The Lancet Gastroenterology & Hepatology 2017 epub Sept 27, 2017.
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REP 301 study protocol
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Inhibition of hepatitis B viral entry by nucleic acid polymers in HepaRG cells and primary human hepatocytes
Guillot C, Martel N, Berby F, Bordes I, Hantz O, Blanchet M, Sureau C, Vaillant A, Chemin I. PLOS ONE 2017 12: e0179697.
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Nucleic Acid Polymers with Accelerated Plasma and Tissue Clearance for Chronic Hepatitis B Therapy.
Roehl I, Seiffert S, Brikh C, Quinet Q, Jamard C, Dorfler N, Lockridge JA, Cova L, Andrew Vaillant A. Mol Ther Nuc Acids. 2017 8: 1-12.
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Nucleic acid-based polymers effective against hepatitis B Virus infection in patients don’t harbor immunostimulatory properties in primary isolated liver cells.
Real CI, Werner M, Paul A, Gerken G, Schlaak JF, Vaillant A, Broering B, Sci. Reports. 2017 7: 43838.
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Nucleic acid polymers: Broad spectrum antiviral activity, antiviral mechanisms and optimization for the treatment of hepatitis B and hepatitis D infection. Vaillant A. Antiviral Research 2016 133: 32-40.
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Safety and Efficacy of Nucleic Acid Polymers in Monotherapy and Combined with Immunotherapy in Treatment-Naive Bangladeshi Patients with HBeAg+ Chronic Hepatitis B Infection. Al-Mahtab M, Bazinet M, Vaillant A. PLOS ONE 2016 11: e0156667.
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Therapeutic Antiviral Effect of the Nucleic Acid Polymer REP 2055 against Persistent Duck Hepatitis B Virus Infection. Noordeen F, Scougall CA, Grosse A, Qiao Q, Ajilian BB, Reache-Miller G, Finnie J, Werner M, Broering R, Schlaak J, Vaillant A, Jilbert AR. PLOS ONE 10: e0140909.
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Nucleic acid polymers prevent the establishment of duck hepatitis B virus infection in vivo. Noordeen F, Vaillant A, Jilbert AR. Antimicrob Agents Chemother. 2013 57:5299-5306.
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Nucleic acid polymers inhibit duck hepatitis B virus infection in vitro. Noordeen F, Vaillant A, Jilbert AR. Antimicrob Agents Chemother. 2013 57:5291-5298.
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Amphipathic DNA polymers inhibit hepatitis C virus infection by blocking viral entry. Matsumura T, Hu Z, Kato T, Dreux M, Zhang YY, Imamura M, Hiraga N, Juteau JM, Cosset FL, Chayama K, Vaillant A, Liang TJ. Gastroenterology. 2009 Aug;137(2):673-81.
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Amphipathic DNA polymers exhibit antiherpetic activity in vitro and in vivo. Bernstein DI, Goyette N, Cardin R, Kern ER, Boivin G, Ireland J, Juteau JM, Vaillant A. Antimicrob Agents Chemother. 2008 Aug;52(8):2727-33.
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Amphipathic DNA polymers are candidate vaginal microbicides and block herpes simplex virus binding, entry and viral gene expression. Guzman EM, Cheshenko N, Shende V, Keller MJ, Goyette N, Juteau JM, Boivin G, Vaillant A, Herold BC. Antivir Ther. 2007;12(8):1147-56. Erratum in: Antivir Ther. 2008;13(2):335.
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Inhibition of cellular entry of lymphocytic choriomeningitis virus by amphipathic DNA polymers. Lee AM, Rojek JM, Gundersen A, Ströher U, Juteau JM, Vaillant A, Kunz S. Virology. 2008 Mar 1;372(1):107-17.
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Phosphorothioate oligonucleotides inhibit human immunodeficiency virus type 1 fusion by blocking gp41 core formation. Vaillant A, Juteau JM, Lu H, Liu S, Lackman-Smith C, Ptak R, Jiang S. Antimicrob Agents Chemother. 2006 Apr;50(4):1393-401.
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# 9
Andrew Vaillant
Replicor Inc.
6100 Royalmount Avenue
Montreal, QC H4P 2
Canada
FUNCTIONAL REMISSION OF HBEAG NEGATIVE CHRONIC HBV INFECTION AFTER WITHDRAWAL OF COMBINED THERAPY WITH REP 2139 OR REP 2165, TENOFOVIR DISOPROXIL FUMARATE AND PEGYLATED INTERFERON Α-2A
Authors:
M. Bazinet4; V. Pantea5; G. Placinta5; I. Moscalu3; V. Cebotarescu; L. Cojuhari5; P. Jimbei2; L. Iarovoi2; V. Smesnoi2; T. Musteata2; A. Jucov3; A. Krawczyk1
Institution(s):
Universitätsklinikum Essen, Institute for Virology1;
Toma Ciorbǎ InfectiousClinical Hospital2;
ARENSIA Exploratory Medicine, Republican Clinical Hospital3;
Replicor Inc.4;
N.Testemitanu State University of Medicine andPharmacy5
Background:
The REP 401 protocol (NCT02565719) is a randomized, controlled trial
assessing the safety and efficacy of the nucleic acid polymers REP 2139 (lead clinical candidate) or REP 2165 combined with tenofovir disoproxil fumarate (TDF) and pegylated interferon α-2a (peg-IFN) in treatment naïve Caucasian patients with chronic HBeAg negative HBV infection.
Methods:
TDF monotherapy (24 weeks, 300mg PO qD) was followed by randomization into
experimental and control groups. Experimental patients received 48 weeks of TDF, peg-IFN (180ug SC qW) and REP 2139 or REP 2165 (250 mg IV infusion qW). Control patients receive 48 weeks of TDF + peg-IFN but crossover to 48 weeks of experimental therapy in the absence of a 3 log drop in HBsAg after 24 weeks of peg-
IFN. Viremia is monitored on the Abbott Architect and Realtime platforms.
Results:
Currently, 19/20 control patients have been crossed over and have completed ≥ 24
weeks of experimental therapy and 19/20 experimental patients have completed treatment and 4-12 weeks of follow-up. Therapy is well tolerated in all except in one crossover patient (REP 2165) who withdrew from therapy due to pegIFN-related depression.Following crossover in the control group, 10/10 patients (REP 2139) and 9/10 patients (REP 2165) have HBsAg reductions > 1 log from baseline. From these 19 responder patients, 14 have achieved HBsAg < 1IU/mL and 11 have achieved HBsAg ≤ 0.01 IU/mL. In the experimental group, 9/10 patients (REP 2139) and 8/10 patients (REP 2165) had HBsAg reductions > 1 log from baseline. From these 17 responder patients, 14 achieved HBsAg <1 IU/mL and 13 achieved HBsAg ≤ 0.01 IU/mL. HBsAg < 1 IU/mL in experimental patients was accompanied by profound increases in anti-HBs (93 to 223,055 mIU/mL) in 9/14 patients and strong therapeutic liver flares (ALT/AST> 5x ULN with normal synthetic liver function) in
12/14 patients. In control patients following crossover to NAP therapy, anti-HBs response is similar (69-68468 mIU/mL), however the strength of liver flares with similar HBsAg reductions were markedly attenuated.
Functional remission of HBV infection (HBsAg ≤ LLOQ, HBV DNA < LLOQ) is persisting 12-24 weeks after removal of therapy in 12 of 13 experimental patients achieving HBsAg <1 IU/mL (REP 2139: 8/10, REP 2165: 5/10). Control of HBV infection is stable in the 13th (REP 2139) patient (HBsAg 1.91 IU/mL, HBV DNA 93 IU/mL) at 24 weeks follow-up. Serum ALT/AST has normalized in all these patients. Rebound of infection has occurred in all other experimental patients during follow-up, however clinical benefit (reversal of HBV DNA rebound and normal ALT/AST) is apparent in two additional patients.
Conclusion:
NAPs are effective and well tolerated in combination with peg-IFN and TDF in HBeAg negative chronic HBV infection. REP 2139-based combination therapy elicits the
establishment of functional control of HBV infection persisting after removal of therapy (functional remission) in 80% of patients.
Disclosure:
Stock/Stock Options: Replicor Inc.
Management Position: Replicor Inc作者: StephenW 时间: 2018-3-21 21:57
#9
安德鲁威兰特
Replicor Inc.
6100 Royalmount Avenue
蒙特利尔,QC H4P 2
加拿大
HBeAG阴性慢性乙型肝炎病毒感染与REP 2139或REP 2165,TENOFOVIR DISOPROXIL FUMARATE和PEG化干扰素A-2A联合治疗后的功能恢复
作者:
M. Bazinet4; V. Pantea5; G. Placinta5; I. Moscalu3; V. Cebotarescu; L. Cojuhari5; P. Jimbei2; L. Iarovoi2; V. Smesnoi2; T. Musteata2; A. Jucov3; A. Krawczyk1
机构(S):
UniversitätsklinikumEssen,病毒学研究所1;
TomaCiorbǎ感染性临床医院2;
ARENSIA探索医学,共和临床医院3;
Replicor Inc.4;
N.Testemitanu国立医科大学和药学院5
背景:
REP 401方案(NCT02565719)是一项随机对照试验
评估核苷酸聚合物REP 2139(主要临床候选物)或REP 2165与替诺福韦二吡呋酯富马酸盐(TDF)和聚乙二醇化干扰素α-2a(peg-IFN)联合治疗初治白种人慢性HBeAg阴性HBV感染患者的安全性和有效性。
方法:
TDF单药治疗(24周,300mg PO qD)后随机分入
实验组和对照组。实验患者接受48周的TDF,peg-IFN(180ug SC qW)和REP 2139或REP 2165(250 mg静脉输注qW)。对照组患者接受48周的TDF + peg-IFN,但是在24周的peg-IFN治疗后,在HBsAg不存在3个对数下降的情况下交叉治疗至48周的实验治疗,
IFN。在Abbott Architect和Realtime平台上监测病毒血症。
结果:
目前,19/20对照患者已经过渡并且已经完成≥24
数周的实验性治疗和19/20例实验性患者已经完成治疗并进行4-12周的随访。除了一名因pegIFN相关抑郁症而退出治疗的交叉患者(REP 2165)之外,所有治疗的耐受性良好。在对照组中,10/10例患者(REP 2139)和9/10例患者(REP 2165)从基线开始HBsAg减少> 1个对数值。从这19名反应患者中,14名获得了HBsAg <1IU / mL,11名获得了HBsAg≤0.01 IU / mL。在实验组中,9/10例患者(REP 2139)和8/10例患者(REP 2165)的HBsAg下降> 1 log。从这17名反应患者中,14名达到HBsAg <1 IU / mL,13名达到HBsAg≤0.01 IU / mL。实验患者的HBsAg <1 IU / mL伴随着9/14患者的抗-HBs(93至223,055 mIU / mL)的显着增加和强烈的治疗性肝脏耀斑(ALT / AST> 5x ULN与正常合成肝功能)
12/14名患者。在对照患者交叉治疗后,抗-HBs反应相似(69-68468mIU / mL),然而具有相似HBsAg降低的肝脏闪光强度显着减弱。
在13例达到HBsAg <1 IU / mL的实验患者中,有12例在治疗结束后12-24周内HBV功能缓解(HBsAg≤LLOQ,HBV DNA <LLOQ)持续存在(REP 2139:8/10,REP 2165:5 / 10)。第13次(REP 2139)患者在随访24周后控制HBV感染稳定(HBsAg 1.91 IU / mL,HBV DNA 93 IU / mL)。所有这些患者的血清ALT / AST已经正常化。随访期间所有其他实验患者都出现了感染反弹,但另外两名患者的临床获益(HBV DNA反弹逆转和正常ALT / AST)明显。
结论:
在HBeAg阴性慢性HBV感染中,NAP与peg-IFN和TDF联合使用是有效且耐受性良好的。基于REP 2139的联合治疗引发了这种疾病
在80%的患者中取消治疗(功能缓解)后,建立了HBV感染的功能控制。
披露:
股票/股票期权:Replicor Inc.
管理职位:Replicor Inc作者: hbv_challenger 时间: 2018-3-21 22:17
Functional remission of HBeAg negative chronic HBV infection after withdrawal of combined therapy with REP 2139 or REP 2165, TDF and peg-IFN
Reported by Jules Levin
AASLD Industry Colloquium
Jan 19-20, 2018, Bethesda, MD, USA
M. Bazinet1, V. Pantea2, G. Placinta2, I. Moscalu3, V. Cebotarescu2, L. Cojuhari2, P. Jimbei4, L. Iarovoi2, V. Smesnoi4, T. Musteata4, A. Jucov2,3, A. Krawczyk5A. Vaillant1
1. Replicor Inc. Montreal, Canada
2. Departmentof Infectious Diseases, Nicolae TestemitanuState Universityof Medicineand Pharmacy, Chisinau, Republicof Moldova
3. ARENSIA ExploratoryMedicine, Republican Clinical Hospital, Chisinau, Republicof Moldova
4. Toma CiorbaInfectious Clinical Hospital, Chisinau, Republicof Moldova.
5. UniversitatsklinikumEssen, Institute for Virology, Essen, Germany.
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