Liver transplant for alcohol-associated liver disease continues to rise 2 years into the COVID-19 pandemic especially among young adults

Higher-Than-Expected Burden of Alcohol-Related Liver Diseases During COVID-19 Pandemic in the USA, with a Tapering Trend

BACKGROUND

Coronavirus disease 2019 (COVID-19) pandemic has led to an increase in alcohol-related liver disease (ALD). The aim of this study was to evaluate the magnitude of ALD hospitalization surge during the pandemic in the USA.

MAIN MEASURES

A retrospective trend analysis of adult hospitalizations for ALD at acute care hospitals across the USA in 2016-2020 was conducted. Hospitalizations were identified using the International Classification of Diseases 10 codes for ALD and non-alcoholic-related liver disease. Outcomes measured included the predicted monthly volume of hospitalizations for ALD and inpatient mortality rates.

KEY RESULTS

During the 2020 pandemic, monthly ALD hospitalizations reached 10,247 representing a 20.7% increase compared to pre-pandemic monthly average of 8490. Additional 4163 ALD hospitalizations occurred during the pandemic, in addition to a pre-pandemic uptrend. The peak of excess ALD hospitalizations was from May to October (monthly excess of 1138) decreasing to monthly excess of 280 in November and December. The excess increase in ALD hospitalizations was primarily observed in young adults, totaling 5256 cases affecting both male (2101 excess cases) and females (2041 excess cases). The age-standardized monthly mortality rate during the pandemic was notably higher than expected at 0.9% (95% CI 0.4 to 1.4%).

CONCLUSIONS

The COVID-19 pandemic led to a significant increase in ALD hospitalizations, above and beyond the pre-existing upward trend, which tapered towards the end of 2020, suggesting a possible decline in the pandemic's impact. The excess increase in ALD hospitalizations was observed primarily in young adults and affected both males and females. These findings highlight the need for further attention to the long-term consequences of the pandemic.

Serum aryl hydrocarbon receptor activity is associated with survival in patients with alcohol-associated hepatitis

BACKGROUND AND AIMS

Patients with alcohol-associated hepatitis (AH) have an altered fecal metabolome, including reduced microbiota-derived tryptophan metabolites, which function as ligands for aryl hydrocarbon receptor (AhR). The aim of this study was to assess serum AhR ligand activity in patients with AH.

APPROACH AND RESULTS

The study included 74 controls without AUD, 97 patients with AUD, and 330 patients with AH from 2 different multicenter cohorts (InTeam: 134, AlcHepNet: 196). Serum AhR activity was evaluated using an AhR reporter assay with HepG2-Lucia cells incubated with serum for 24 hours. Serum AhR activity was significantly higher in patients with AH compared with both controls (1.59 vs. 0.96-fold change, p < 0.001) and patients with AUD (1.59 vs. 0.93, p < 0.001). In both AH cohorts, patients with AhR activity ≥ 2.09 had significantly lower cumulative survival rates at 30, 60, 90, and 180 days compared to those with AhR activity < 2.09. When serum AhR activity was used to further stratify patients with severe AH, the cumulative 30, 60, 90, and 180-day survival rates for patients with severe AH and the AhR activity ≥ 2.09 group were all significantly lower than those with an AhR activity < 2.09 group.

CONCLUSIONS

Serum AhR activity was significantly higher in patients with AH compared with controls and individuals with AUD, and this increased activity was associated with higher mortality. Consequently, serum AhR activity holds potential as a prognostic marker.

Liver transplantation for alcohol-associated liver disease

Alcohol-associated liver disease (ALD) is a major cause of morbidity and mortality worldwide, and a leading indication for liver transplantation (LT) in many countries, including the United States. However, LT for ALD is a complex and evolving field with ethical, social, and medical challenges. Thus, it requires a multidisciplinary approach and individualized decision-making. Short-term and long-term patient and graft survival of patients undergoing LT for ALD are comparable to other indications, but there is a continued need to develop better tools to identify patients who may benefit from LT, improve the pretransplant and posttransplant management of ALD, and evaluate the impact of LT for ALD on the organ donation and transplantation systems. In this review, we summarize the current evidence on LT for ALD, from alcohol-associated hepatitis to decompensated alcohol-associated cirrhosis. We discuss the indications, criteria, outcomes, and controversies of LT for these conditions and highlight the knowledge gaps and research priorities in this field.

The landscape of liver transplantation for patients with alcohol-associated liver disease in the United States

Indications for liver transplants have expanded to include patients with alcohol-associated liver disease (ALD) over the last decade. Concurrently, the liver allocation policy was updated in February 2020 replacing the Donor Service Area with Acuity Circles (ACs). The aim is to compare the transplantation rate, waitlist outcomes, and posttransplant survival of candidates with ALD to non-ALD and assess differences in that effect after the implementation of the AC policy. Scientific Registry for Transplant Recipients data for adult candidates for liver transplant were reviewed from the post-AC era (February 4, 2020-March 1, 2022) and compared with an equivalent length of time before ACs were implemented. The adjusted transplant rates were significantly higher for those with ALD before AC, and this difference increased after AC implementation (transplant rate ratio comparing ALD to non-ALD = 1.20, 1.13, 1.61, and 1.32 for the Model for End-Stage Liver Disease categories 37-40, 33-36, 29-32, and 25-28, respectively, in the post-AC era, p < 0.05 for all). The adjusted likelihood of death/removal from the waitlist was lower for patients with ALD across all lower Model for End-Stage Liver Disease categories (adjusted subdistribution hazard ratio = 0.70, 0.81, 0.84, and 0.70 for the Model for End-Stage Liver Disease categories 25-28, 20-24, 15-19, 6-14, respectively, p < 0.05). Adjusted posttransplant survival was better for those with ALD (adjusted hazard ratio = 0.81, p < 0.05). Waiting list and posttransplant mortality tended to improve more for those with ALD since the implementation of AC but not significantly. ALD is a growing indication for liver transplantation. Although patients with ALD continue to have excellent posttransplant outcomes and lower waitlist mortality, candidates with ALD have higher adjusted transplant rates, and these differences have increased after AC implementation.

Alcohol-associated liver disease-Global epidemiology

Alcohol-associated liver disease (ALD), as highlighted in this narrative review, is a major public health concern, increasingly impacting global disease burden and premature mortality. In 2019, ALD accounted for the loss of 11 million life-years worldwide. The rising number of deaths and disability-adjusted life-years attributed to ALD, particularly pronounced in the United States, are alarming. Projections suggest that the economic impact of ALD, as seen in the United States, could potentially double by 2040. ALD is increasingly prevalent among younger adults (20-45 y) and has become the leading cause of liver transplantation in both United States and Europe. During the COVID-19 pandemic, the existing trend was further amplified as high-risk drinking patterns coincided with a rise in hospital admissions for alcohol-associated hepatitis and increased ALD-related mortality. The prevalence of ALD is estimated at 3.5% in the general population, 26.0% among hazardous drinkers, and 55.1% among those with alcohol use disorders. Alarmingly, 5-year mortality rates for patients with ALD exceed 50%, with even higher rates in more advanced disease stages. Methodological challenges, such as underreporting, diagnostic difficulties, and variability in registry data quality, complicate the accurate assessment of the impact of ALD. Additionally, the contribution of alcohol to the progression of other liver diseases is often under acknowledged in health care registries, leading to a significant underestimation of its broader implications for liver health. Addressing the growing ALD concern requires robust public health initiatives, heightened awareness, refined diagnostic techniques, and comprehensive epidemiological studies. These measures are vital to tackle the increasing prevalence of ALD and mitigate its extensive impact on individuals and health care systems.

Intersection of Coronavirus Disease 2019 and Alcohol-associated Liver Disease: A Review of Emerging Trends and Implications

PURPOSE

This review will provide an overview of alcohol use and alcohol associated liver disease (ALD) prior to the coronavirus disease 2019 (COVID-19) pandemic and the impact of the pandemic on alcohol use and ALD. Furthermore, this review will explore strategies to mitigate the growing disease burden of AUD and ALD.

METHODS

A search using PubMed was performed for articles on topics related to alcohol use, ALD, and COVID-19. The literature was reviewed and pertinent sources were used for this narrative review.

FINDINGS

In the United States (US), excessive alcohol use is the third leading cause of preventable death. Prior to the COVID-19 pandemic, the increasing prevalence of alcohol use disorder (AUD) and ALD in the US had already constituted a public health crisis given the association between alcohol misuse, AUD, and ALD with significant medical, economic, and societal burdens. The COVID-19 pandemic led to increased alcohol consumption and downstream consequences, including increased prevalence of AUD, ALD, ALD-related hospitalization and death, and liver transplantation for ALD.

IMPLICATIONS

There is a critical need for additional, multi-pronged interventions to mitigate the mortality and morbidity linked to ALD.