Publications by authors named "Anna Lok"

Introduction: Withdrawal of nucleos(t)ide analog (NA) therapy is associated with hepatitis B surface antigen (HBsAg) loss and sustained, off-therapy partial cure (normal ALT [≤30 U/L males, ≤20 U/L females) with HBV DNA <2000 IU/mL) but should be offered only to those most likely to benefit. HBVRNA may be useful for risk stratification.

Methods: The Hepatitis B Research Network Immune-Active Trial prospectively evaluated treatment with tenofovir (TDF) for 192 weeks ± peginterferon-α (PegIFN) for initial 24 weeks followed by protocolized withdrawal of TDF amongst eligible participants (NCT01369212).

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Article Synopsis
  • Paracentesis is a procedure used to relieve discomfort from fluid buildup in the abdomen (ascites), but the exact connection between fluid pressure, volume, and patient discomfort hasn't been clearly defined.
  • This study examined the effects of paracentesis on patients with non-cancerous ascites by measuring symptom scores before and after the procedure, and found significant reductions in both abdominal pressure and symptoms following an average drainage of 6.5 liters.
  • The results indicated a correlation between symptom relief and abdominal pressure for pressures above 6 cm HO, suggesting that while height and volume of fluid drained influence discomfort, they cannot fully account for all aspects of patient relief after the procedure.
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Background And Aims: HE is a major cause of poor quality of life in patients with cirrhosis. A simple diagnostic test to identify minimal hepatic encephalopathy (MHE) and predict future overt HE (OHE) is lacking. We aimed to evaluate if analysis of speech patterns using a modern speech platform (1) correlates with validated HE tests, (2) correlates with MHE, and (3) predicts future OHE.

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Background And Aims: Guidelines recommend that patients with hepatic encephalopathy (HE) receive a high-protein diet (roughly 1 g/kg actual body weight). Concommitant sodium restriction, low health literacy, and food insecurity limit patients' ability to meet this goal. We aimed to determine the feasibility of home-delivered high-protein medically tailored meals (MTMs) for patients with a recent episode of overt HE.

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  • Minimal hepatic encephalopathy (MHE) is linked to a greater risk of overt hepatic encephalopathy (OHE) as measured by the portosystemic hepatic encephalopathy score (PHES).
  • A multicenter study followed patients with MHE to see if worse PHES results led to a progressively higher risk of developing OHE.
  • Findings showed that while abnormal PHES indicates a higher chance of OHE, there isn't a stepwise increase in risk as PHES scores worsen beyond a certain threshold.
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Introduction: Indeterminate liver nodules (ILNs) are frequently encountered on diagnostic imaging after positive hepatocellular carcinoma (HCC) surveillance results, but their natural history remains unclear.

Methods: We conducted a multicenter retrospective cohort study among patients with ≥1 newly detected LI-RADS 3 (LR-3) lesion ≥1 cm or LI-RADS 4 (LR-4) lesion of any size (per LI-RADS v2018) between January 2018 and December 2019. Patients were followed with repeat imaging at each site per institutional standard of care.

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Identifying effective, feasible, low-cost interventions that promote sustainable lifestyle changes in nonalcoholic fatty liver disease (NAFLD) is a key unmet need. The aim of this study was to assess predictors of lifestyle practice patterns of NAFLD patients and evaluate the implementation of a mobile technology-based intervention. We prospectively enrolled adults with NAFLD (diagnosed by imaging or biopsy).

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Current treatment of chronic hepatitis B virus (HBV) infection, pegylated interferon-α (pegIFN-α) and nucleos(t)ide analogue (NA), can suppress HBV replication, reverse liver inflammation and fibrosis, and decrease risks of cirrhosis and hepatocellular carcinoma, but hepatitis B surface antigen (HBsAg) loss is rare. Functional HBV cure is defined as undetectable HBsAg and unquantifiable serum HBV DNA for at least 24 weeks after a finite course of therapy. This requires suppression of HBV replication and viral protein production as well as restoration of immune response to HBV.

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Background And Aims: Despite the substantial impact of environmental factors, individuals with a family history of liver cancer have an increased risk for HCC. However, genetic factors have not been studied systematically by genome-wide approaches in large numbers of individuals from European descent populations (EDP).

Approach And Results: We conducted a 2-stage genome-wide association study (GWAS) on HCC not affected by HBV infections.

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Background: Patient portals are a common electronic medical record tool that allow for the asynchronous exchange of health information between patients and their health care teams. Patients can leverage patient portals to perform tasks such as viewing test results, reviewing clinical notes, and messaging their health care team. The impact of patient portal use on clinical outcomes in cirrhosis is unknown.

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Background And Aims: Minimal hepatic encephalopathy (MHE) is a frequent complication in patients with liver cirrhosis. Its impact on predicting the development of overt hepatic encephalopathy (OHE) and survival has not been studied in large multicenter studies.

Methods: Data from patients recruited at eight centers across Europe and the United States were analyzed.

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Importance: Hepatitis D virus (HDV) infection occurs in association with hepatitis B virus (HBV) infection and affects approximately 12 million to 72 million people worldwide. HDV causes more rapid progression to cirrhosis and higher rates of hepatocellular carcinoma than HBV alone or hepatitis C virus.

Observations: HDV requires HBV to enter hepatocytes and to assemble and secrete new virions.

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Background: Several complications of cirrhosis are theorized to result from the translocation of bacteria or their products across the intestinal epithelium. We aimed to assess epithelial permeability and associations with mucosal bacteria in patients with cirrhosis.

Approach And Results: We collected 247 duodenum, ileum, and colon biopsies from 58 consecutive patients with cirrhosis and 33 controls during clinically indicated endoscopies.

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Introduction: Alcohol cessation improves mortality in alcohol-associated liver disease (ALD), but few ALD patients will engage in treatment. We aimed to demonstrate the feasibility and acceptability of a mobile health intervention to increase alcohol use disorder (AUD) treatment among ALD patients.

Methods: We conducted a pilot randomized controlled trial (September 2020 to June 2022) at a single tertiary care center in adults with any stage of ALD, past 6-month drinking, and no past-month AUD treatment.

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Article Synopsis
  • * Out of 201 patients treated with tenofovir (alone or with peginterferon), 50 experienced ALT flares, with 74% classified as moderate or severe, which were linked to significant HBsAg reductions compared to those without flares.
  • * Results indicate that severe ALT flares lead to quicker decreases in HBsAg levels, suggesting flare intensity could be an important factor in assessing responses to hepatitis B treatments.
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Background: NAFLD is increasingly common among young people. Whether NAFLD carries a more benign course in younger adults is not known. We aimed to characterize genetic and metabolic risk factors for NAFLD and their effects on disease progression across age groups.

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Death rates from primary liver cancer (hepatocellular carcinoma [HCC]) have continued to rise in the United States over the recent decades despite the availability of an increasing range of treatment modalities, including new systemic therapies. Prognosis is strongly associated with tumor stage at diagnosis; however, most cases of HCC are diagnosed beyond an early stage. This lack of early detection has contributed to low survival rates.

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A functional cure of chronic hepatitis B defined as sustained hepatitis B surface antigen loss after finite course of therapy is rarely achieved with current therapy but is the goal of novel treatments. Understanding the virological and immunological mechanisms of hepatitis B virus persistence has enabled the identification of novel treatment targets, drug discovery, and the evaluation of novel agents in clinical trials. Lessons were learned from early phase 1 and phase 2 trials regarding the antiviral activity and safety profile of these agents.

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  • Researchers studied the effectiveness of HBV RNA and HBcrAg, two virological markers, in predicting various disease activity events in patients with chronic hepatitis B (CHB).
  • They analyzed data from participants in a North American study to see if these markers could enhance existing prediction models already based on demographic, clinical, and viral factors.
  • The findings indicated that while HBV RNA and HBcrAg are predictive of certain clinical events, they do not significantly improve the accuracy of models using more commonly available markers.
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