Harry L.A. Janssen's research while affiliated with Michael Garron Hospital and other places

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Publications (800)


Switching to tenofovir alafenamide in patients with virologically suppressed chronic hepatitis B and renal or hepatic impairment: final week 96 results from an open-label, multicentre, phase 2 study
  • Article

June 2024

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20 Reads

The Lancet Gastroenterology & Hepatology

Harry L A Janssen

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Edward Gane

Background Phase 3 studies in patients with chronic hepatitis B have shown tenofovir alafenamide to have non-inferior efficacy to tenofovir disoproxil fumarate, with improved renal and bone safety. We conducted this study to evaluate the safety and efficacy of switching to tenofovir alafenamide in participants with chronic hepatitis B and renal or hepatic impairment. Methods This open-label, multicentre, phase 2 study was done in eight countries or territories at 30 sites. We recruited adults (≥18 years) with chronic hepatitis B who were virally suppressed on nucleoside or nucleotide analogues and had renal impairment (part A: moderate or severe in cohort 1 [estimated glomerular filtration rate by the Cockcroft–Gault formula (eGFRCG) 15–59 mL/min] or end-stage renal disease [eGFRCG <15 mL/min] on haemodialysis in cohort 2) or hepatic impairment including decompensation (part B: Child–Turcotte–Pugh score 7–12). Participants switched to 25 mg of tenofovir alafenamide given orally once daily for 96 weeks. The primary endpoint was the proportion of participants with viral suppression (HBV DNA <20 IU/mL) at week 24 by missing-equals-failure analysis. Efficacy (full analysis set) and safety (safety analysis set) analyses included all enrolled participants who received at least one dose of the study drug. Week 96 safety was assessed, including renal and bone parameters. This trial is registered at ClinicalTrials.gov, NCT03180619, and is completed. Findings 124 participants (93 in part A [78 in cohort 1 and 15 in cohort 2] and 31 in part B) were enrolled between Aug 11, 2017, and Oct 17, 2018, and included in the full and safety analysis sets. 106 (85%) participants completed the study. There were 69 (74%) men and 24 (26%) women in part A and 21 (68%) men and ten (32%) women in part B. At week 24, 91 (97·8%, 95% CI 92·4 to 99·7) of 93 individuals in part A (76 [97·4%, 91·0 to 99·7] of 78 in cohort 1 and 15 [100·0%, 78·2 to 100·0] of 15 in cohort 2) and 31 (100·0%, 88·8 to 100·0) in part B had HBV DNA of less than 20 IU/mL. By week 96, the most common adverse event was upper respiratory tract infection, which occurred in 14 (15%) participants in part A and in six (19%) participants in part B. Serious adverse events occurred in 20 (22%) part A participants and in ten (32%) part B participants; none were related to treatment. No treatment-related deaths occurred. At week 96, median change in estimated glomerular filtration rate (Cockcroft-Gault method) was 1·0 mL/min (IQR −2·8 to 4·5) in cohort 1 and −2·4 mL/min (−11·4 to 10·7) in part B. Mean changes in spine and hip bone mineral density were 1·02% (SD 4·44) and 0·20% (3·25) in part A and −0·25% (3·91) and 0·28% (3·25) in part B. Interpretation Tenofovir alafenamide might offer continued antiviral efficacy and a favourable safety profile for patients with renal or hepatic impairment and chronic hepatitis B switching from tenofovir disoproxil fumarate or other antivirals. Funding Gilead Sciences.

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B cell activation gene signature in blood and liver of HBeAg+ immune active chronic hepatitis B patients

June 2024

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3 Reads

The Journal of Infectious Diseases

Background Immunological studies on chronic hepatitis B virus (HBV) infection have convincingly shown immune dysfunction involving multiple cell types. The focus of the majority of studies has been on the role of T cells and showed an impaired functional T cell response to HBV. B cells have been evaluated more recently, but in contrast to T cells, more pronounced activation of circulating B cells has been reported. To gain more insight into the activation status of B cells, we investigated the activation gene profile of B cells in the blood and liver of chronic HBV patients. Methods RNA-seq and flow cytometric analysis was performed on peripheral blood B cells of immune active chronic HBV patients, comparing them with samples from healthy controls. In addition, gene expression profiles of B cells in the liver were analyzed by bulk and single-cell RNA-seq. Results and conclusions Our data show a distinctive B cell activation gene signature in the blood of immune active chronic HBV patients, characterized by a significant upregulation of immune-related genes, including IRF1, STAT1, STAT3, TAP1, and TAPBP. This peripheral activation profile was also observed in B cells from the liver by single cell RNA-seq showing upregulation of IRF1, CD83 and significantly higher CD69 expression, with naive and memory B cell subsets being the primary carriers of the signature. Our findings suggest that B cell gene profiles reflect responsiveness to HBV infection, these findings are relevant for clinical studies evaluating immunomodulatory treatment strategies for HBV.









Citations (51)


... 142 Several scores, including the LiverRisk, SAFE and MAF-5 score are currently being developed for the population-based setting. [143][144][145] Future studies will need to address how these scores perform regarding accuracy, in sequential testing and regarding cost-effectiveness. ...

Reference:

EASL–EASD–EASO Clinical Practice Guidelines on the management of metabolic dysfunction-associated steatotic liver disease (MASLD)
MAF-5 PREDICTS LIVER FIBROSIS RISK AND OUTCOME IN THE GENERAL POPULATION WITH METABOLIC DYSFUNCTION
  • Citing Article
  • March 2024

Gastroenterology

... Hence, per-protocol NA cessation after HBsAg seroclearance is the common practice in these programmes. HBsAg seroreversion may occur in some patients if HBsAg seroclearance resulted from the inhibition of HBsAg expression, namely small interfering RNA (siRNA), or antisense oligonucleotides (ASO) [44] (Table 1). Long-term follow-up data from these programmes would be valuable to ascertain the minimal risk of disease progression in patients who achieved functional cure with these novel HBV therapeutics. ...

Erratum: Incidence of Hepatic Decompensation After Nucleos(t)ide Analog Withdrawal: Results From a Large, International, Multiethnic Cohort of Patients With Chronic Hepatitis B (RETRACT-B Study)
  • Citing Article
  • March 2024

The American Journal of Gastroenterology

... Further, we tried to analyze the role of immunemediated liver damage [18] on the progress of ADV infection. Different cytokines and immune cells were investigated. ...

Liver-restricted Type I IFN Signature Precedes Liver Damage in Chronic Hepatitis B Patients Stopping Antiviral Therapy
  • Citing Article
  • January 2024

The Journal of Immunology

... In HBeAg-negative patients receiving long-term NAs, the addition of PEG-IFN to long-term NA treatment was associated with a substantial HBsAg decline and 10% HBsAg clearance (10). Low baseline HBsAg levels and early ontreatment HBsAg decline were predictive of subsequent HBsAg clearance (10). ...

Addition of PEG-interferon to long-term nucleos(t)ide analogue therapy enhances HBsAg decline and clearance in HBeAg-negative chronic hepatitis B: Multicentre Randomized Trial (PAS Study)
  • Citing Article
  • Full-text available
  • January 2024

Journal of Viral Hepatitis

... It is particularly noteworthy that the effectiveness of the PAGE-B score in predicting HCC has not been thoroughly evaluated in patients of African origin, a population in which CHB is a significant cause of morbidity and mortality. A recent study by Patmore et al. [43] highlighted the association between HCC incidence and varying levels of the PAGE-B score in hepatitis B patients of African descent. Specifically, the risk of HCC was negligible among individuals without advanced fibrosis and a low baseline (m)PAGE-B score. ...

Hepatocellular carcinoma risk in Sub-Saharan African and Afro-Surinamese individuals with chronic hepatitis B living in Europe
  • Citing Article
  • October 2023

Journal of Hepatology

... To the editor, When Jeng et al [1] reported that stopping antivirals in patients with cirrhosis and chronic hepatitis B had better outcomes than continuing therapy, debate followed. [2,3] Similarly, we are concerned with several issues that affect the interpretation of this study. ...

Letter to the Editor: Benefits of stopping therapy in cirrhotic hepatitis B patients, true effect or residual confounding?
  • Citing Article
  • October 2023

Hepatology

... Five-year (week 240) results from the international cohort confirm the favorable long-term safety of TAF. 17 Here we report the 5-year (week 240) efficacy and safety results from the China 108 and 110 cohorts. We highlight findings from both studies, including the long-term efficacy and safety of continuous TAF treatment as well as the impact of switching to TAF after receiving 3 years of TDF treatment. ...

Long-Term Treatment With Tenofovir Alafenamide for Chronic Hepatitis B Results in High Rates of Viral Suppression and Favorable Renal and Bone Safety

The American Journal of Gastroenterology

... Indeed, it is important to note that recent trials of siRNAs have all benefitted from the addition of immune modulators, most commonly peg-IFN-α. Even bepirovirsen, a leading antisense RNA candidate for HBV, which did not explicitly benefit from additional peg-IFN-α, has been found to have intrinsic immunostimulatory activity [125,126]. Systemic peg-IFN-α clearly upregulates several of the ISGs that are also HBV restriction factors, described above. It is notable that peg-IFN-α has a higher rate of HBsAg clearance, i.e., a functional cure, compared to NUCs, the mainstay of CHB treatment, underscoring the potency of the suite of restriction factors described here. ...

Efficacy and safety of the siRNA JNJ-73763989 and the capsid assembly modulator JNJ-56136379 (bersacapavir) with nucleos(t)ide analogues for the treatment of chronic hepatitis B virus infection (REEF-1): a multicentre, double-blind, active-controlled, randomised, phase 2b trial
  • Citing Article
  • July 2023

The Lancet Gastroenterology & Hepatology

... Most patients have undetectable viremia and normal liver biochemistry after HBsAg seroclearance, and less than 5% of patients have HBsAg reversion after seroclearance [2]. This translates into a much-reduced risk of HCC and cirrhotic complications [3]. As clearance of intrahepatic covalently closed circular DNA (cccDNA) and integrated HBV DNA is unlikely to be achieved in the foreseeable future using current technologies, sustained HBsAg seroclearance with serum HBV DNA less than the lower limit of quantitation is generally accepted as the functional cure of CHB [4]. ...

Guidance on treatment endpoints and study design for clinical trials aiming to achieve cure in chronic hepatitis B and D: Report from the 2022 AASLD-EASL HBV-HDV Treatment Endpoints Conference
  • Citing Article
  • June 2023

Journal of Hepatology

... Our study utilized liver fine-needle aspirates for single-cell sequencing of B cells, while others such as Zhang et al. [9] and Bai et al. [10] performed single-cell sequencing on core liver biopsies after enzymatic digestion of liver tissues and sorting of CD45-positive leukocytes. As reported previously, the use of liver fine-needle aspirates avoids the time and sample manipulation involved with digestion and cell sorting and allows the collection of liver material from patients on a voluntary basis even without a medical indication to do so [11]. However, despite efforts to validate our findings using publically available datasets, the methodological differences prevented reliable comparisons between datasets. ...

Single-cell RNA sequencing of liver fine-needle aspirates captures immune diversity in the blood and liver in chronic hepatitis B patients
  • Citing Article
  • May 2023

Hepatology