Review article: New developments in biomarkers and clinical drug development in alpha-1 antitrypsin deficiency-related liver disease.

BACKGROUND: Alpha-1 antitrypsin liver disease (AATLD) occurs in a subset of patients with alpha-1 antitrypsin deficiency. Risk factors for disease progression and specific pathophysiologic features are not well known and validated non-invasive assessments for disease severity are lacking. Currently, there are no approved treatments for AATLD. AIMS: To outline existing understanding of AATLD and to identify knowledge gaps critical to improving clinical trial design and development of new treatments. METHODS: This report was developed following a multi-stakeholder forum organised by the Alpha-1 Antitrypsin Deficiency Related Liver Disease Expert Panel in which experts presented an overview of the available literature on this topic. RESULTS: AATLD results from a 'gain of toxic function' and primarily manifests in those with the homozygous Pi*ZZ genotype. Accumulation of misfolded 'Z' AAT protein in liver cells triggers intracellular hepatocyte injury which may ultimately lead to hepatic fibrosis. Male gender, age over 50 years, persistently elevated liver tests, concomitant hepatitis B or C virus infection, and metabolic syndrome, including obesity and type 2 diabetes mellitus, are known risk factors for adult AATLD. While the gold standard for assessing AATLD disease activity is liver histology, less invasive measures with low intra- and inter-observer variability are needed. Measurement of liver stiffness shows promise; validated thresholds for staging AATLD are in development. Such advances will help patients by enabling risk stratification and personalised surveillance, along with streamlining the development process for novel therapies. CONCLUSIONS: This inaugural forum generated a list of recommendations to address unmet needs in the field of AATLD.

Outcomes of early vs late treatment initiation in solid organ transplantation from hepatitis C virus nucleic acid test-positive donors to hepatitis C virus-uninfected recipients: Results from the HCV-TARGET study.

Curative hepatitis C virus (HCV) therapy has increased transplantation from HCV-infected nucleic acid test-positive donors to HCV-uninfected recipients (D+/R-). We evaluated outcomes of early and late HCV treatment among D+/R- nonliver organ transplants. Patients received HCV regimens per local standard (n = 10 sites). Outcomes were compared between early and late treatments. Early treatment regimens (ETR) (n = 56) were initiated pretransplantation to day 7 posttransplant. Late treatment regimens (LTRs) (n = 102) began median 31 (range, 8-114) days posttransplant. There were 79 kidney, 50 lung, 23 heart, and 6 mixed transplants, similar between groups. HCV RNA was quantifiable in 98% of LTR versus 44.6% of ETR recipients (P < .001). Mean (range) days on treatment were 28 (7-93) ETR and 81 (51-111) LTR (P < .0001). There were no virological failures with ETR, but relapse (n = 3) and nonresponse (n = 2) in LTR (P = .16), including fibrosing cholestatic hepatitis postrelapse (n = 1). Sustained virological response was 100% (95% confidence interval, 93.4-100.0) in ETR (n = 54) and 94.9% (95% confidence interval, 88.5-98.3) in LTR (n = 98). Acute rejection occurred in 11 (19.6%) ETR and 25 (24.5%) LTR. In total, 11 HCV-unrelated deaths occurred: 8 ETR and 3 LTR. Organ transplantation from HCV-infected nucleic acid test-positive donors to HCV-uninfected recipients was safe. ETR led to fewer virological failures with shorter treatment duration, supporting recommendations to initiate treatment promptly posttransplant.

Patient-reported symptoms and interest in symptom monitoring in HCC treated with locoregional therapies: A qualitative study.

BACKGROUND: Patient-reported outcomes (PRO) measures relevant to domains most important to patients with HCC who received locoregional therapies are needed to advance patient-centered research. Furthermore, electronic PRO monitoring in clinical care has been shown to reduce hospitalizations and deaths in patients with other cancers. We conducted a qualitative study among patients with HCC who recently received locoregional therapies to (1) identify common and distressing posttreatment symptoms to prioritize PRO domain selection and (2) gauge interest in an electronic PRO symptom monitoring system. METHODS: We performed semi-structured telephone interviews among adult patients who received locoregional therapies (median of 26 days after treatment) for treatment-naïve HCC at a single tertiary care center. Interviews were conducted until thematic saturation was reached. Qualitative content analysis was conducted to identify emerging themes and sub-themes. RESULTS: Ten of 26 patients (38%) reported at least 1 symptom before treatment. In contrast, all participants (n = 26) with recently treated HCC reported at least 1 posttreatment physical symptom, with the most common being appetite loss (73%), fatigue (58%), abdominal pain (46%), and nausea (35%). Most participants (77%) stated they saw potential benefits in posttreatment ePRO symptom monitoring. CONCLUSIONS: Posttreatment symptoms after HCC locoregional therapies are common and often severe. These data can inform and prioritize PRO domain selection. Patients are interested in ePRO monitoring to monitor and proactively address posttreatment symptoms. Given the clinical benefits in patients with metastatic cancers, ePRO monitoring warrants investigation in patients with HCC.

Validation of a Clinical Risk-based Classification System in a Large Nonalcoholic Fatty Liver Disease Real-world Cohort.

BACKGROUND & AIMS: There is an unmet need to validate simple and easily available methods that can be used in routine practice to identify those at risk of adverse outcomes from nonalcoholic fatty liver disease (NAFLD). A retrospective-prospective analysis of NAFLD patients enrolled in a longitudinal noninterventional study (TARGET-NASH) was performed to validate the prognostic utility of the following risk-categories: (A) Fibrosis-4 (FIB-4) <1.3 and/or liver-stiffness measurement (LSM) measured by Fibroscan <8 kp, (B) FIB-4 1.31‒2.6 and/or LSM 8.1-12.5 kp, and (C) FIB-4 >2.6 and/or LSM >12.5 kp. METHODS: Those in class A with aspartate transaminase:alanine transaminase ratio >1 or platelets <150,000/mm3, or class B with aspartate transaminase:alanine transaminase ratio >1 or platelets <150,000/mm3 were upstaged by one class. Fine-Gray competing risk analyses were performed for all outcomes. RESULTS: A total of 2523 individuals (class A = 555, B = 879, C = 1089) were followed for a median duration of 3.74 years. Adverse outcomes increased from class A to C in all-cause mortality (0.07 vs 0.3 vs 2.5/100 person-years [PY], hazard ratio [HR], 3.0 and 16.3 class B and C vs A), liver-associated clinical events (0.2 vs 1 vs 8/100 PY, HR, 4.3 and 36.6 B and C vs A), major adverse cardiovascular events (0.69 vs 0.87 vs 2.02/100 PY, HR, 0.78 and 1.55 B and C vs A), hepatocellular carcinoma (0 vs 0.09 vs 0.88/100 PY, HR, 8.32 C vs B), and chronic kidney disease (1.24 vs 2.48 vs 3.51/100 PY). Those who were upstaged had outcome rates similar to the lower class defined by their FIB-4. CONCLUSIONS: These data support a FIB-4-based risk-stratification of NAFLD that can be used in routine clinical practice. CLINICALTRIALS: gov Identifier: NCT02815891.

Randomized Trial of Tenofovir With or Without Peginterferon Alfa Followed by Protocolized Treatment Withdrawal in Adults With Chronic Hepatitis B.

INTRODUCTION: Hepatitis B surface antigen (HBsAg) loss is associated with improved long-term outcomes of patients with chronic hepatitis B but is infrequently achieved with current monotherapies. We assessed whether combination strategies that included treatment withdrawal enhanced HBsAg loss. METHODS: A randomized (1:1) trial of tenofovir disoproxil fumarate (TDF) for 192 weeks with or without peginterferon (PegIFN) alfa-2a for the first 24 weeks, followed by withdrawal of TDF at week 192 with 48 weeks of off-treatment follow-up to week 240. The primary end point was HBsAg loss at week 240. RESULTS: Of 201 participants (52% HBeAg positive, 12%/6% genotype A/A2, 7% cirrhosis) randomized to TDF + PegIFN (n = 102) or TDF alone (n = 99), 6 participants had lost HBsAg at the end of the treatment phase (week 192), 5 (5.3%) in the combination group, and 1 (1.0%) in the TDF alone group ( P = 0.09). By week 240, 9 participants had cleared HBsAg, 5.3% in combination, and 4.1% in monotherapy arms ( P = 0.73). HBsAg decline and loss occurred earlier with TDF + PegIFN than TDF, with a ≥1-logIU/mL qHBsAg decline by week 24 in 28% in TDF + PegIFN compared with 6% in TDF ( P = 0.04). HBsAg loss occurred in 7 of 12 (58%) with hepatitis B virus subgenotype A2 (all HBeAg positive) compared with only 2 of 189 (1%) with other hepatitis B virus genotypes and in 8 of 93 (8.6%) HBeAg positive vs 1 of 87 (1.1%) HBeAg negative. DISCUSSION: PegIFN combined TDF followed by protocolized TDF withdrawal led to earlier but not higher percentages of HBsAg clearance. Pretreatment HBeAg positivity and subgenotype A2 were strongly associated with HBsAg clearance.

Effectiveness of Remdesivir Treatment Protocols Among Patients Hospitalized with COVID-19: A Target Trial Emulation.

BACKGROUND: Remdesivir is recommended for certain hospitalized patients with COVID-19. However, these recommendations are based on evidence from small randomized trials, early observational studies, or expert opinion. Further investigation is needed to better inform treatment guidelines with regard to the effectiveness of remdesivir among these patients. METHODS: We emulated a randomized target trial using chargemaster data from 333 US hospitals from 1 May 2020 to 31 December 2021. We compared three treatment protocols: remdesivir within 2 days of hospital admission, no remdesivir within the first 2 days of admission, and no remdesivir ever. We used baseline comorbidities recorded from encounters up to 12 months before admission and identified the use of in-hospital medications, procedures, and oxygen supplementation from charges. We estimated the cumulative incidence of mortality or mechanical ventilation/extracorporeal membrane oxygenation with an inverse probability of censoring weighted estimator. We conducted analyses in the total population as well as in subgroups stratified by level of oxygen supplementation. RESULTS: A total of 274,319 adult patients met the eligibility criteria for the study. Thirty-day in-hospital mortality risk differences for patients adhering to the early remdesivir protocol were -3.1% (95% confidence interval = -3.5%, -2.7%) compared to no early remdesivir and -3.7% (95% confidence interval -4.2%, -3.2%) compared to never remdesivir, with the strongest effect in patients needing high-flow oxygen. For mechanical ventilation/extracorporeal membrane oxygenation, risk differences were minimal. CONCLUSIONS: We estimate that, among hospitalized patients with COVID-19, remdesivir treatment within 2 days of admission reduced 30-day in-hospital mortality, particularly for patients receiving supplemental oxygen on the day of admission.

Speech patterns and enunciation for encephalopathy determination-A prospective study of hepatic encephalopathy.

Hepatic encephalopathy (HE) is a complication of cirrhosis that benefits from early diagnosis and treatment. We aimed to characterize speech patterns of individuals with HE to investigate its potential to diagnose and monitor HE. This was a single-center prospective cohort study that included participants with cirrhosis with HE (minimal HE [MHE] and overt HE [OHE]), cirrhosis without HE, and participants without liver disease. Audio recordings of reading, sentence repetition, and picture description tasks were obtained from these groups. Two certified speech-language pathologists assessed speech rate (words per minute) and articulatory precision. An overall severity metric was derived from these measures. Cross-sectional analyses were performed using nonparametric Wilcoxon statistics to evaluate group differences. Change over time in speech measures was analyzed descriptively for individuals with HE. The study included 43 total participants. Speech results differed by task, but the overall pattern showed slower speech rate and less precise articulation in participants with OHE compared to other groups. When speech rate and precision ratings were combined into a single speech severity metric, the impairment of participants with OHE was more severe than all other groups, and MHE had greater speech impairment than non-liver disease controls. As OHE improved clinically, participants showed notable improvement in speech rate. Participants with OHE demonstrated impaired speech rate, precision, and speech severity compared with non-liver disease and non-HE cirrhosis. Participants with MHE had less pronounced impairments. Speech parameters improved as HE clinically improved. Conclusion: These data identify speech patterns that could improve HE diagnosis, grading, and remote monitoring.

Safety and Effectiveness of Tenofovir Alafenamide in Usual Clinical Practice Confirms Results of Clinical Trials: TARGET-HBV.

BACKGROUND: Nucleos(t)ide analogues, with a proven record of safety and efficacy, have been the therapy of choice for over a decade for the treatment of chronic hepatitis B. The approval of tenofovir alafenamide (TAF) in 2016 provided an additional treatment option. AIMS: The aim of this study was to evaluate the characteristics and clinical outcomes of patients treated with TAF in usual clinical practice. METHODS: Retrospective data from electronic health records was obtained from those enrolled in TARGET-HBV, a longitudinal observational cohort study of patients with chronic hepatitis B managed according to local practice standards at community and academic medical centers throughout the U.S. RESULTS: Of 500 patients enrolled, most were male (66%) and of Asian race (66%) with median age of 55 years. Cirrhosis was evident in 15%. Most patients (82%) had switched to TAF after treatment with other antivirals. The perceived safety profile of TAF was cited as the primary reason for changing therapy (32%). TAF was well tolerated and only 4 patients discontinued therapy due to adverse event during a median duration of TAF dosing of 74 weeks. Among those with paired laboratory data 12-18 months after switching to TAF, biochemical response and HBV DNA suppression was maintained. Most patients had normal renal function which was essentially unchanged throughout follow-up. CONCLUSIONS: TAF is frequently utilized in routine clinical practice due to the perception of its improved safety profile. The current study supports the growing body of evidence regarding the safety and effectiveness of TAF. Trial Registration ClinicalTrials.gov identifier: NCT03692897, https://clinicaltrials.gov/ct2/show/NCT03692897 .

Prevalence and Factors Associated With Statin Use Among Patients With Nonalcoholic Fatty Liver Disease in the TARGET-NASH Study.

Patients with nonalcoholic fatty liver disease (NAFLD) are at an increased risk of cardiovascular disease. Hydoxy-3-methyglutaryl-coenzyme reductase inhibitors, statins, reduce the risk of cardiovascular events.1 Studies have shown that statins are safe among patients with liver disease, including those with compensated cirrhosis,2 and their use is associated with lower mortality, hepatic decompensation, and possibly hepatocellular carcinoma.3,4 Despite these data, statins are under prescribed among patients with liver disease due to concerns about hepatotoxicity.5 This study aimed to assess prevalence and patient factors associated with indicated statin use in patients with NAFLD in a real-world cohort.

Factors Associated With Readmission in the United States Following Hospitalization With Coronavirus Disease 2019.

BACKGROUND: Patients hospitalized for coronavirus disease 2019 (COVID-19) may experience complications following hospitalization and require readmission. In this analysis, we estimated the rate and risk factors associated with COVID-19-related readmission and inpatient mortality. METHODS: In this retrospective cohort study, we used deidentified chargemaster data from 297 hospitals across 40 US states on patients hospitalized with COVID-19 from 15 February 2020 through 9 June 2020. Demographics, comorbidities, acute conditions, and clinical characteristics of first hospitalization are summarized. Multivariable logistic regression was used to measure risk factor associations with 30-day readmission and in-hospital mortality. RESULTS: Among 29 659 patients, 1070 (3.6%) were readmitted. Readmitted patients were more likely to have diabetes, hypertension, cardiovascular disease (CVD), or chronic kidney disease (CKD) vs those not readmitted (P < .0001) and to present on first admission with acute kidney injury (15.6% vs 9.2%), congestive heart failure (6.4% vs 2.4%), or cardiomyopathy (2.1% vs 0.8%) (P < .0001). Higher odds of readmission were observed in patients aged >60 vs 18-40 years (odds ratio [OR], 1.92; 95% confidence interval [CI], 1.48-2.50) and those admitted in the Northeast vs West (OR, 1.43; 95% CI, 1.14-1.79) or South (OR, 1.28; 95% CI, 1.11-1.49). Comorbidities including diabetes (OR, 1.34; 95% CI, 1.12-1.60), CVD (OR, 1.46; 95% CI, 1.23-1.72), CKD stage 1-5 (OR, 1.51; 95% CI, 1.25-1.81), and CKD stage 5 (OR, 2.27; 95% CI, 1.81-2.86) were associated with higher odds of readmission; 12.3% of readmitted patients died during second hospitalization. CONCLUSIONS: Among this large US population of patients hospitalized with COVID-19, readmission was associated with certain comorbidities and acute conditions during first hospitalization. These findings may inform strategies to mitigate risks of readmission due to COVID-19 complications.

"If I Get Cured, My Whole Quality of Life Will Change": Patients' Anticipated and Actualized Benefits Following Cure from Chronic Hepatitis C.

BACKGROUND: Patients' motivations for undergoing direct-acting antiviral (DAA) therapy for chronic hepatitis C may include anticipation of treatment benefits not well described in the literature. AIMS: Evaluate patients' anticipated and actualized improvements in several domains of functioning before and after viral cure. METHODS: Pre-post-study utilizing in-depth interviews with 28 patients prior to, and several months after, DAA therapy. Interviews were audio-recorded, transcribed, coded, and analyzed by two qualitative experts. RESULTS: Patients had a median age of 54 years, 43% were male, 57% white, 25% had cirrhosis, and 71% were treated with sofosbuvir/ledipasvir. Pre-treatment, patients hoped for improvements in several domains including psychological, emotional, physical, social, and occupational functioning. After viral cure, increased energy and less fear of transmission were pathways to better quality of life. Psychological and emotional improvements positively affected physical, social, and occupational functioning. Social improvements were due to better mood and motivation, fewer symptoms, and reduced fear of stigma and transmission. Occupational benefits were linked to increased stamina, self-confidence, and less pain, anxiety, and stigma. Reduced fear of stigma had a pervasive impact on all life improvements after cure. Patient characteristics such as the presence of cirrhosis or psychiatric issues influence treatment motivations. Qualitative data correspond with change in pre-post-survey scores. CONCLUSIONS: Tremendous hope is placed on the ability of DAA therapy to bring about substantial improvements in life functioning after viral cure. Highly interconnected effects on quality of life worked synergistically through improved physical and psychological well-being. Stakeholders should appreciate the multi-dimensional benefits that viral eradication bestows upon individuals and society.

Liver biopsy in the real world-reporting, expert concordance and correlation with a pragmatic clinical diagnosis.

BACKGROUND: Patients with non-alcoholic steatohepatitis (NASH) and fibrosis stage ≥2 comprise a target population for pharmacotherapy. Liver biopsy, the reference standard for identifying this population, requires complete and accurate assessment of steatohepatitis and fibrosis. Aims To investigate the completeness of real-world NASH-related pathology reports, assess concordance between site pathologists and central expert interpretation of the histologic elements of NASH, and determine concordance between biopsy-diagnosed NASH and a pragmatic clinical definition of NASH. METHODS: Liver pathology reports from 222 patients across 38 TARGET-NASH sites were analysed for documentation of the histologic features of NASH. Biopsy slides were over-read by a blinded central expert pathologist. Concordance of histologic scores and interpretation was assessed. Histologic concordance with a clinical definition of NASH was determined. TARGET-NASH clinically defined NASH: elevated ALT, hepatic steatosis on biopsy or imaging and ≥1 of the following: BMI ≥30 kg/m2 , type 2 diabetes mellitus and dyslipidaemia. RESULTS: Documentation of steatosis, lobular inflammation, portal inflammation and ballooning were missing from 21%, 35%, 46% and 40% of reports, respectively. There was slight-to-fair concordance (weighted kappa 0.01-0.35) between site and central pathologists for inflammatory features, and moderate concordance (weighted kappa 0.56-0.57) for fibrosis staging. Clinical definition of NASH was 75%-91% concordant (94%-95% sensitive) with biopsy-diagnosed NASH. CONCLUSIONS: There is substantial variability in reporting and grading NASH and fibrosis staging in clinical practice. This heterogeneity may adversely impact patient assessment and translation of practice guidelines into reality. The TARGET-NASH pragmatic clinical definition may serve as a valuable tool to accurately identify NASH patients in clinical practice.

A Pragmatic, Randomized Controlled Trial of Oral Antivirals for the Treatment of Chronic Hepatitis C: The PRIORITIZE Study.

BACKGROUND AND AIMS: Multiple direct-acting antiviral (DAA) regimens are available to treat HCV genotype 1 infection. However, comparative effectiveness from randomized controlled trials of DAA regimens is unavailable. APPROACH AND RESULTS: We conducted a pragmatic randomized controlled trial (NCT02786537) to compare the effectiveness of DAAs for HCV genotype 1a or 1b on viral response, safety, tolerability, and medication nonadherence. Adults with compensated liver disease, HCV genotype 1, not pregnant or breastfeeding, and with health insurance likely to cover ledipasvir/sofosbuvir (LDV/SOF) were recruited from 34 US viral hepatitis clinics. Participants were randomized (± ribavirin) to LDV/SOF, elbasvir/grazoprevir (EBR/GZR), and paritaprevir/ritonavir/ombitasvir+dasabuvir (PrOD; treatment arm stopped early). Primary outcomes included sustained viral response at 12 weeks (SVR12), clinician-recorded adverse events, patient-reported symptoms, and medication nonadherence. Between June 2016 and March 2018, 1,609 participants were randomized. Among 1,128 participants who received ≥1 dose of EBR/GZR or LDV/SOF (± ribavirin), SVR12 was 95.2% (95% CI, 92.8%-97.6%) and 97.4% (95% CI, 95.5%-99.2%), respectively, with a difference estimate of 2.2% (-0.5% to 4.7%), falling within the "equivalence" interval (-5% to 5%). While most (56%) participants experienced adverse events, few were serious (4.2%) or severe (1.8%). In the absence of ribavirin, discontinuations due to adverse events were rare. Patient-reported symptoms and medication nonadherence were similar. Study limitations were dropout due to insurance denial and loss to follow-up after treatment, limiting the ability to measure SVR12. CONCLUSIONS: This pragmatic trial demonstrated high SVR12 for participants treated with EBR/GZR and LDV/SOF with few adverse effects. Overall, the two regimens were equivalent in effectiveness. The results support current HCV guidelines that do not distinguish between ribavirin-free EBR/GZR and LDV/SOF.

Real-world evidence in hepatocellular carcinoma.

Real-world evidence includes all health-related information, such as electronic health records, insurance claims, pharmacy records and wearables that are obtained outside of clinical trials. These data can provide critical insights into the natural history of disease and evaluate the safety and effectiveness of treatment regimens used in clinical practice. Real-world data have been applied to varying degrees by global regulatory agencies to inform and expedite many phases of drug development and help refine the use of therapeutic regimens after marketing, especially in populations that are under-represented in registration trials. For the management of hepatocellular carcinoma, early detection provides the best chance for curative therapies, whose success has been evaluated in numerous cohorts. The availability of novel systemic therapies, including kinase inhibitors and immunotherapies, has provided new treatment options and improved survival in patients with advanced stage hepatocellular carcinoma. Real-world longitudinal observational studies can help understand the long-term safety and effectiveness of these agents.

Primary Care Providers in Federally Qualified Health Centers Can Treat Hepatitis C Effectively Without Ongoing Consultative Support From Specialists.

BACKGROUND: Hepatitis C virus (HCV) infection remains underdiagnosed and undertreated, but treatment advances may allow primary care providers to address gaps in care by delivering HCV treatment themselves. OBJECTIVE: The objective of this study was to evaluate results of an HCV treatment program at a federally qualified health center (FQHC) in rural North Carolina and assess the extent to which program success depends upon ongoing consultative support from specialists. METHODS: In this retrospective cohort study, we used data on 381 FQHC patients internally referred for HCV care from January 2015 to December 2018, with follow-up through December 2019. Using modified Poisson regression analyses we compared outcomes during periods with (2015-2016) and without (2017-2018) consultative support. Outcomes included treatment initiation, completion, and cure. We also modeled the likelihood of keeping the first appointment, but because multiple referral attempts were made among nonresponsive patients throughout the study period, we could not compare this outcome in periods with and without consultative support. RESULTS: Of all patients referred for evaluation, 91.3% kept at least 1 appointment, 74.1% initiated treatment, 72% completed treatment, and 68.1% were cured. When comparing periods with and without consultative support, there were no significant differences in treatment initiation ([relative risk (RR): 0.975, 95% confidence interval (CI): 0.871, 1.092], treatment completion (RR: 0.989, 95% CI: 0.953, 1.027), or cure (RR: 0.977, 95% CI: 0.926, 1.031). CONCLUSIONS: After 2 years of consultative support from specialists, primary care providers at FQHCs can deliver HCV treatment effectively without ongoing support. However, more research is needed to determine whether our findings are generalizable across primary care settings.

Linkage of resistance-associated substitutions in GT1 sofosbuvir + NS5A inhibitor failures treated with glecaprevir/pibrentasvir.

BACKGROUND & AIMS: Retreatment with glecaprevir/pibrentasvir (G/P) resulted in a rate of sustained virologic response 12 weeks after treatment completion (SVR12) of >90% in HCV genotype 1 (GT1) patients who previously failed a regimen of sofosbuvir plus an NS5A inhibitor (NS5Ai). This study investigated the prevalence and impact of baseline NS3 and NS5A resistance-associated substitutions (RASs) on the efficacy of G/P in prior GT1 sofosbuvir+NS5Ai failures and the persistence of treatment-emergent RASs. METHODS: Longitudinal samples from 177 patients enrolled in a phase IIIb, randomized pragmatic clinical trial were analyzed. Patients without cirrhosis were randomized to 12 or 16 weeks of G/P, and patients with compensated cirrhosis were randomized to G/P and ribavirin for 12 weeks or G/P for 16 weeks. Linkage of RAS was identified using Primer-ID next-generation sequencing at a 15% cut-off. RESULTS: Of 177 patients, 169 (95.5%) were PI-naïve. All 33 GT1b-infected patients achieved SVR12. In GT1a-infected patients, baseline NS5A RASs were prevalent (74.5%, 105/141) but NS3 RASs were uncommon. Baseline NS3 RASs had no impact on G/P efficacy and patients with baseline NS5A RASs showed a numerically but not statistically significantly lower SVR12 rate compared to those without NS5A RASs (89% vs. 97%). SVR12 was achieved in 34 of 35 (97%) patients without NS5A baseline substitution, and 53 of 57 (93%), 35 of 40 (88%), 5 of 8 (63%) with single, double-linked, and triple-linked NS5A substitutions, respectively. Among 13 patients with virologic failure, 4 acquired treatment-emergent NS3 RASs and 10 acquired NS5A RASs. CONCLUSION: Baseline NS5A RASs were highly prevalent. The presence of an increasing number of linked NS5A RASs in GT1a showed a trend in decreasing SVR12 rates, although no specific NS5A RASs or their linkage pattern were associated with lower SVR12 rates. LAY SUMMARY: Direct-acting antivirals have revolutionized the treatment of chronic hepatitis C infection, but treatment failure occurs in some patients. Retreatment of patients who previously failed a regimen consisting of sofosbuvir and an NS5A inhibitor with a regimen of glecaprevir and pibrentasvir (G/P) is >90% effective. Herein, we analyzed samples from these patients and showed that retreatment efficacy with G/P is lower in patients with double- or triple-linked NS5A resistance mutations than in patients with single or no NS5A resistance mutations. CLINICAL TRIAL NUMBER: NCT03092375.

Patient-reported outcomes 12 months after hepatitis C treatment with direct-acting antivirals: Results from the PROP UP study.

BACKGROUND & AIMS: The long-term impact of hepatitis C virus (HCV) therapy with all-oral direct-acting antivirals (DAAs) on patient-reported outcomes (PROs) has not been well-described. We characterized changes in PROs from pre-treatment to 12 months post-treatment in a real-world cohort. METHODS: PROP UP was a multi-centre observational cohort study of 1601 patients treated with DAAs at 11 US gastroenterology/hepatology practices from 2015 to 2017. PROs were evaluated pre-treatment (T1) and 12 months post-treatment (T5). A minimally important change (MIC) threshold was prespecified as >5% change in PRO scores from T1 to T5. Multivariable analyses identified predictors of change. RESULTS: Three-quarters of patients were 55 or older; 45% were female, 60% were white, 33% were black, nearly half had cirrhosis. The most commonly-prescribed DAA regimens were sofosbuvir-based (83%) and grazoprevir/elbasvir (11%). Study retention was >95%. On average, small improvements were observed at 3 months post-treatment in all PROs and sustained at 12 months post-treatment among patients with sustained virologic response (SVR). Clinically meaningful improvements were achieved in fatigue (mean change score: -3.7 [-4.2, -3.1]), sleep (mean change score: -3.1 [-3.7, -2.5]), abdominal pain (mean change score: -2.6 [-3.3, -1.9]) and functional well-being (mean change score: -7.0 [-6.0, -8.0]). Symptom improvements were generally not sustained with no SVR (n = 52). Patients with cirrhosis and MELD ≥12 had the greatest improvements in functional well-being (-12.9 [-17.6, -8.1]). CONCLUSIONS: The improvements in patient-reported outcomes reported by patients who achieved SVR following HCV DAA therapy were durable at 12 months post-treatment.