Ledipasvir/Sofosbuvir for Hepatitis B Virus Infection

Study Overview
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Brief Summary
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The goals of therapy against chronic hepatitis B are to decrease the morbidity and mortality related to chronic HBV infection. Currently available antiviral therapy can suppress viral replication but only a small proportion attain functional cure, which is defined as HBV surface antigen-to-antibody seroconversion. Hepatitis B surface antigen (HBsAg) is a marker of persistent hepatitis B infection. It has been observed that patients who had both hepatitis B and hepatitis C, and who were treated for their hepatitis C with 12 weeks of ledipasvir/sofosbuvir for had a decline in HBsAg levels. This study hypothesizes that a similar decrease would be seen in mono-infected hepatitis B subjects over the course of 12 weeks treatment with ledipasvir/sofosbuvir.

Official Title
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A Phase II Open-Label Study of Ledipasvir/Sofosbuvir for 12 Weeks in Subjects With Hepatitis B Virus Infection

Conditions
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Hepatitis B

Intervention / Treatment
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* Drug: Ledipasvir 90 MG / Sofosbuvir 400 MG Oral Tablet [Harvoni]
* Drug: Sofosbuvir 400 MG [Sovaldi]
* Drug: Ledipasvir 90 MG


Participation Criteria
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Eligibility Criteria
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INCLUSION CRITERIA Participants in Groups A, C & D (Chronic HBV, low replicative state not requiring treatment): Provision of signed and dated informed consent form Stated willingness to comply with all study procedures and availability for the duration of the study Male or female, aged 18 or older at screening Diagnosed with chronic hepatitis B infection defined as one of the following: HBsAg or HBV DNA positivity for at least 6 months Medical records indicating a chronic HBV infection HBeAg negative at screening HBV DNA > lower level of quantitation (LLOQ) Quantitative HBsAg at least 10 IU/mL at screening Ability to take oral medication and be willing to adhere to the twelve week study drug regimen For females of reproductive potential: usual practice of complete abstinence from sexual intercourse with a member of the opposite sex OR use of at least one form of highly effective contraception for at least 1 month prior to enrollment and agreement to use such a method during study participation and for an additional 30 days after the end of study drug administration For males of reproductive potential: usual practice of complete abstinence from sexual intercourse with a member of the opposite sex OR use of at least one form of highly effective contraception for at least 1 month prior to enrollment and agreement to use such a method during study participation and for an additional 14 days after the end of study drug administration Ability to communicate effectively with the study investigator and key staff Medical management provided by a primary care provider Ability to store medications at a room temperature of less than 86 degrees Fahrenheit Not on antiviral therapy or requiring treatment for HBV during screening Participants in Group B (Chronic HBV, virally suppressed): Provision of signed and dated informed consent form Stated willingness to comply with all study procedures and availability for the duration of the study Male or female, aged 18 or older at screening Diagnosed with chronic hepatitis B infection defined as one of the following: HBsAg or HBV DNA positivity for at least 6 months Medical records indicating a chronic HBV infection Receiving oral anti-HBV medications (either tenofovir alafenamide, tenofovir disoproxil fumarate, entecavir, or a combination of no more than 2 of these agents) for at least three months prior to enrollment HBV DNA ˂ lower level of quantitation (LLOQ) at screening and for at least three months prior Quantitative HBsAg at least 10 IU/mL at screening Ability to take oral medication and be willing to adhere to the twelve week study drug regimen For females of reproductive potential: usual practice of complete abstinence from sexual intercourse with a member of the opposite sex OR use of at least one form of highly effective contraception for at least 1 month prior to enrollment and agreement to use such a method during study participation and for an additional 30 days after the end of study drug administration For males of reproductive potential: usual practice of complete abstinence from sexual intercourse with a member of the opposite sex OR use of at least one form of highly effective contraception for at least 1 month prior to enrollment and agreement to use such a method during study participation and for an additional 14 days after the end of study drug administration Ability to communicate effectively with the study investigator and key staff Medical management provided by a primary care provider Ability to store medications at a room temperature of less than 86 degrees Fahrenheit EXCLUSION CRITERIA Coinfection with hepatitis C, hepatitis D or human immunodeficiency virus (HIV) Pregnancy or lactation Known allergic reactions to sofosbuvir or ledipasvir Treatment with another investigational drug or other intervention within three months Evidence of cirrhosis or hepatic decompensation such as: Platelets less than 100,000 /mm3 Albumin less than 3.5 g/dL INR greater than 1.7 or Prothrombin time of 1.5 times the upper limit of normal (ULN) Total bilirubin of 1.5 times the upper limit of normal FibroTest (or FibroSure®) of 0.75 or greater Abnormal hematological and biochemical parameters at screening including: White blood cell count less than 2500 cells/uL Absolute neutrophil count (ANC) less than 1,000 cells/mm3 (less than 750 mm3 for African or African-American subjects) Hemoglobin less than 12 g/dL for males, less than 11 g/dL for females AST or ALT of two times the upper limit of normal Estimated GFR less than 50 mL/min Glycosylated hemoglobin (HbA1c) greater than 8.5% Current or prior history of any of the following: Immunodeficiency disorders or autoimmune disease (e.g. Systemic lupus erythematosus, rheumatoid arthritis, inflammatory bowel diseases, sarcoidosis, psoriasis of greater than mild severity) Severe pulmonary disorders, significant cardiac diseases Gastrointestinal disorder with post-operative condition that could interfere with the absorption of the study drugs Significant psychiatric illness that in the judgment of the Investigator, is a contraindication to protocol participation or impairs a volunteer's ability to give informed consent Any malignancy diagnosed within 5 years (not including recent localized treatment of squamous or non-invasive basal cell skin cancer; cervical carcinoma in situ appropriately treated prior to screening) Solid organ transplantation Poor venous access Screening ECG with clinically significant findings Evidence of HCC (e.g., α fetoprotein > 50ng/mL or radiologic evidence) Clinically significant illicit drug or alcohol abuse within 12 months of screening. Subjects on methadone maintenance treatment or prescribed opioid may be included. Use of amiodarone within 90 days of enrollment; or carbamazepine, phenytoin, phenobarbital, oxcarbazepine, rifabutin, rifampin, rifapentine, St. John's wort, rosuvastatin, or interferon within 30 days of enrollment or expected use of these prohibited drugs during study participation. Use of or expected need of proton-pump inhibitors more than 20 mg omeprazole equivalent or H2 receptor antagonist more than 40 mg famotidine BID equivalent within 7 days of enrollment.

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Interventional Model Description: Open-label Study, multi-arm
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Group A (LDV/SOF for low replicative HBV)<br>12 week treatment with ledipasvir/sofosbuvir (Harvoni) for chronic hepatitis B in low replicative state. | Drug: Ledipasvir 90 MG / Sofosbuvir 400 MG Oral Tablet [Harvoni]<br>* 1 pill once daily for 12 weeks for Group A<br>* Other names: Harvoni;|
| Experimental: Group B (LDV/SOF for viral suppressed HBV)<br>12 week treatment with ledipasvir/sofosbuvir (Harvoni) for chronic hepatitis B, virally suppressed. | Drug: Ledipasvir 90 MG / Sofosbuvir 400 MG Oral Tablet [Harvoni]<br>* 1 pill once daily for 12 weeks for Group A<br>* Other names: Harvoni;|
| Experimental: Group C (SOF for low replicative HBV)<br>12 weeks treatment with sofosbuvir (Sovaldi) for chronic hepatitis B in low replicative state. Randomized 1:1 with Group D. | Drug: Sofosbuvir 400 MG [Sovaldi]<br>* 1 pill once daily for 12 weeks for Group C<br>* Other names: GS-7977;|
| Experimental: Group D (LDV for low replicative HBV)<br>12 weeks treatment with ledipasvir for chronic hepatitis B in low replicative state. Randomized 1:1 with Group C. | Drug: Ledipasvir 90 MG<br>* 1 pill once daily for 12 weeks for Group D<br>* Other names: GS-5885;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Change of Serum Hepatitis B Surface Antigen (HBsAg as Measured in log10 IU/mL) Level as an Indicator of Antiviral Activity of Ledipasvir and/or Sofosbuvir in Subjects With Chronic Hepatitis B From Baseline to End of 12 Weeks Treatment. | Subjects with chronic hepatitis B will be give 12 weeks of ledipasvir and/or sofosbuvir and their HBsAg will be measured at baseline, on each visits during therapy, and at end of therapy (week 12). The change (decline) in HBsAg from baseline to end of the 12 week treatment will be compared. | 12 weeks | 
| Incidence of Adverse Events Leading to Permanent Discontinuation of Ledipasvir and/or Sofosbuvir Treatment in Subjects With Chronic Hepatitis B Infection. | Number of subjects who discontinued study drug due to adverse event | 12 Weeks | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Changes in Serum Hepatitis B Virus DNA Levels (HBV DNA as Measured in IU/mL) With Treatment of Ledipasvir and/or Sofosbuvir From Baseline to End of 12 Weeks of Treatment in Subjects With Chronic Hepatitis B Infection. | Subjects with chronic hepatitis B will be give 12 weeks of ledipasvir and/or sofosbuvir and their serum hepatitis B DNA levels (HBV DNA) will be measured at baseline, on each visits during therapy, and at end of therapy (week 12). The change in HBV DNA levels from baseline to end of the 12 week treatment will be compared. Note: Group B (virally suppressed HBV subjects) - all had HBV DNA below the limit of detection; Hence, mean change was 0. | 12 weeks | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Hepatitis B, HBsAg, Ledipasvir/Sofosbuvir, Hepatitis B treatment