Superior Wait-List Outcomes in Patients with Alcohol-Associated Liver Disease Compared With Other Indications for Liver Transplantation

Waitlisting and liver transplantation for MetALD in the United States: An analysis of the UNOS national registry

BACKGROUND AND AIMS

The new steatotic liver disease (SLD) nomenclature introduced metabolic and alcohol-associated liver disease (MetALD), describing the intersection of metabolic dysfunction-associated steatotic liver disease and alcohol-associated liver disease. Waitlisting and liver transplantation for MetALD are not well defined. We aimed to develop and validate an algorithm for identifying SLD phenotypes and assessing trends in waitlisting and transplant outcomes.

APPROACH AND RESULTS

We conducted a retrospective cohort study using the United Network for Organ Sharing registry, supplemented with detailed single-center data. We developed 5 candidate algorithms for SLD classification and calculated their diagnostic performance. Trends in waitlist registrations and transplants were estimated, and competing risk analyses and Cox regression models were conducted to assess waitlist removal and posttransplant outcomes among SLD phenotypes. The best-performing algorithm demonstrated substantial agreement (weighted kappa, 0.62) for SLD phenotypes, with acceptable sensitivity (73%) for MetALD. Between 2002 and 2022, waitlist registrations and transplants for MetALD increased 2.9-fold and 3.3-fold, respectively. Since 2013, there has been a significant increase in the absolute number of waitlist registrations (122 per year; 95% CI, 111-133) and transplants (107 per year; 95% CI, 94-120) for MetALD. Patients with MetALD experienced higher waitlist removal (adjusted subdistribution hazard ratio, 1.10; 95% CI, 1.03-1.17), all-cause mortality (adjusted hazard ratio, 1.13; 95% CI, 1.03-1.23), and graft failure (adjusted hazard ratio, 1.12; 95% CI, 1.03-1.21) than those with alcohol-associated liver disease.

CONCLUSIONS

We developed and validated an algorithm for identifying SLD phenotypes in UNOS. MetALD is the third leading etiology among those waitlisted and underwent transplantation, exhibiting worse pretransplantation and posttransplantation outcomes compared to alcohol-associated liver disease. Identifying and addressing factors determining poor outcomes is crucial in this patient population.

Acute and non-acute decompensation of liver cirrhosis (47/130)

In the traditional view, the occurrence of cirrhosis-related complications, such as hepatic encephalopathy, formation of ascites or variceal haemorrhage, marks the transition to the decompensated stage of cirrhosis. Although the dichotomous stratification into a compensated and decompensated state reflects a prognostic water-shed moment and remains to hold its prognostic validity, it represents an oversimplification of clinical realities. A broadening understanding of pathophysiological mechanisms underpinning decompensation have led to the identification of distinct prognostic subgroups, associated with different clinical courses following decompensation. Data provided by the PREDICT study uncovered three distinct sub-phenotypes of acute decompensation (AD). Moreover, acute-on-chronic liver failure (ACLF) has been established as a distinct clinical entity for many years, which is associated with a high short-term mortality. Recently, non-acute decompensation (NAD) has been proposed as a distinct pathway of decompensation, complementing current concepts of the spectrum of decompensation. In contrast to AD, NAD is characterized by a slow and progressive development of complications, which are often presented at first decompensation and/or in patients in an earlier stage of chronic liver disease. Successful treatment of AD or NAD may lead to a clinical stabilization or even the concept of recompensation. This review aims to provide an overview on current concepts of decompensation and to delineate recent advances in our clinical and pathophysiological understanding.

Workup and management of liver transplantation in alcohol-related liver disease

Alcohol-related liver disease (ALD) represents the most common indication for liver transplantation (LT) worldwide. Outcomes of LT for ALD are comparable with those of LT for other etiologies; however, ALD is still considered a controversial indication for LT, mainly because it is considered a self-inflicted disease with a high risk of return to alcohol use after LT. Pre-LT evaluation criteria have changed over time, with a progressive re-evaluation of the required pre-transplant duration of abstinence. Despite the fact that some transplant programs still require 6 months of abstinence in order to consider a patient suitable for LT, there is increasing evidence that a pre-transplant abstinence period of <6 months can be considered for well-selected patients. Early LT for severe alcohol-related hepatitis that has not responded to medical therapy has been shown to be an effective therapeutic option with high survival benefit when performed within strict and well-recognized criteria. However, high variability in LT access exists for these patients due to the presence of social and medical stigma. A psycho-social assessment, together with an evaluation by an addiction specialist, should be mandatory in patients with ALD who are potential candidates for LT in order to assess the risk of post-transplant return to alcohol use and to ensure good long-term outcomes. Finally, before LT, attention should be paid to the presence of other potential comorbidities (i.e., cardiovascular and neurological diseases), which could represent a potential contraindication to LT. Similarly, after LT, patients should be adequately monitored for the development of cardiovascular events and screened for "de novo" tumors, although standardized protocols for this monitoring do not exist at this time.

Prognostic Factors in Alcohol-associated Liver Disease Patients Presenting With First Evidence of Ascites

GOALS

To identify factors associated with transplantation and death in alcohol-associated liver disease (ALD) patients presenting with first evidence of ascites.

BACKGROUND

Ascites development is a poor prognostic sign for patients with cirrhosis. Among ALD patients, the baseline factors at time of ascites development that are associated with eventual transplantation or death are currently unknown.

STUDY

Adult patients with ascites in the "Evaluating Alcohol Use in Alcohol-related Liver Disease Prospective Cohort Study" (NCT03267069 clinicaltrials.gov) were identified from 2016 to 2020. Demographic, clinical, and laboratory factors at initial ascites presentation were identified as potential predictors of transplant and death as competing risks.

RESULTS

A total of 96 patients were identified. Median (interquartile range) follow-up time was 2.00 years (0.87 to 3.85). By last follow-up, 34/96 patients had been transplanted (35.4%) and 11/96 had died (11.4%). Prognostic factors for transplant included age per decade [hazard ratio (HR): 0.52 (95% CI, 0.33 to 0.83)], employed status [HR: 0.35 (95% CI, 0.14 to 0.90)], and sodium [HR: 0.94 (95% CI, 0.90 to 0.99)], whereas prognostic factors for death were body mass index [HR: 1.11 (95% CI, 1.00 to 1.22)], Charlson index [HR: 2.14 [95% CI, 1.13 to 4.08]), Maddrey Discriminant Function >32 (HR: 5.88 (95% CI, 1.18, 29.39)], aspartate aminotransferase [HR: 0.99 (95% CI, 0.98 to 0.997)], and a prior 12-month abstinence period [HR: 5.53 (95% CI, 1.10 to 27.83)], adjusted for age, sex, and ALD subcategory.

CONCLUSIONS

Several factors at initial ascites presentation are associated with increased risk of transplantation or death and validation in larger cohorts will allow for improved risk stratification for ALD patients.

Alcohol-associated liver disease: Epidemiology and management

Alcohol is the leading cause of preventable liver morbidity and mortality worldwide, as it is also the most frequent cause of advanced liver disease. Alcohol-associated liver disease (ALD) covers different phenotypes ranging from steatosis to the development of inflammation (steatohepatitis), fibrosis and ultimately, in a proportion of patients, the development of liver cirrhosis and its associated complications. ALD has a complex pathogenesis that includes the interplay of both genetic and environmental factors, yet the precise mechanisms are largely unknown. Alcohol-associated hepatitis (AH) is a severe clinical presentation of ALD, which is characterized by abrupt jaundice and clinical decompensations of liver disease. AH occurs in a percentage of patients with underlying ALD and active alcohol consumption. Currently, there are no approved targeted therapies able to interfere in the pathogenesis of ALD and halt the progression of the disease, therefore alcohol abstinence is the most effective measure to improve prognosis in this patient population. In this regard, alcohol cessation remains the first-line treatment in all stages of alcohol disease. In patients with advanced ALD nonresponding to medical therapy, liver transplantation is the only approach that improves prognosis, and it should be considered in patients with decompensated cirrhosis. In the last years, AH has emerged as a new indication of early liver transplantation in non-responders to medical therapy, with promising results in highly selected patients. In this review, we provide an update on the epidemiology, risk factors, natural history, diagnosis, pathogenesis, and current treatments for ALD, taking into account the importance of assessing and managing alcohol consumption as the etiological factor and the main driver of prognosis in patients with ALD.

Hepatic recompensation according to Baveno VII criteria is linked to a significant survival benefit in decompensated alcohol-related cirrhosis

BACKGROUND & AIMS

Removing the primary aetiological factor in decompensated cirrhosis may lead to a restoration of hepatic function. In this study, we investigated the clinical implications of recompensation and the subsequent survival in patients with decompensated alcohol-related cirrhosis.

METHODS

The rate of recompensation was evaluated in patients with decompensated alcohol-related cirrhosis and persistent alcohol abstinence undergoing a hepatic venous pressure gradient (HVPG) measurement. Recompensation was defined according to Baveno VII criteria as resolution of ascites and hepatic encephalopathy, absence of variceal bleeding and improvement in liver function.

RESULTS

Two hundred and four abstinent patients with decompensated alcohol-related cirrhosis (age: 57.2 [IQR:50.1-63.7] years; 75.0% male; median MELD: 15 [IQR:11-19]) and a median HVPG of 20 (IQR:18-24) mmHg were included. During a median follow-up of 24.4 (IQR:10.9-50.4) months, 37 patients (18.1%) achieved abstinence-induced recompensation. Lower baseline HVPG, lower Child-Pugh score, lower BMI, higher albumin and higher mean arterial pressure were linked to a higher probability of recompensation. After adjusting for age, disease severity, portal hypertension and systemic inflammation, achieving recompensation resulted in a significant and considerable reduction in liver-related mortality (adjusted HR: 0.091 [95% CI: 0.012-0.677]; p = .019). Only 13 patients (6.4%) developed hepatocellular carcinoma, with a tendency towards a lower risk upon recompensation (HR: 0.398 [95% CI: 0.084-1.878]; p = .245), yet this finding did not reach statistical significance and requires further investigation.

CONCLUSIONS

Alcohol abstinence led to recompensation in 18.1% of our cohort of HVPG-characterised patients with decompensated alcohol-related cirrhosis. Achieving hepatic recompensation resulted in a >90% risk reduction in liver-related mortality.

Should responsibility be used as a tiebreaker in allocation of deceased donor organs for patients suffering from alcohol-related end-stage liver disease?

There is a long-standing debate concerning the eligibility of patients suffering from alcohol-related end-stage liver disease (ARESLD) for deceased donor liver transplantation. The question of retrospective and/or prospective responsibility has been at the center of the ethical discussion. Several authors argue that these patients should at least be regarded as partly responsible for their ARESLD. At the same time, the arguments for retrospective and/or prospective responsibility have been strongly criticized, such that no consensus has been reached. A third option was proposed as a form of compromise, namely that responsibility should only be used as a tiebreaker in liver allocation. The present study provides an ethical investigation of this third option. First, we will provide an overview of the main arguments that have been offered for and against the use of responsibility as an allocation criterion. Second, we will explore the concept of responsibility as a tiebreaker in detail and discuss several types of situations, in which responsibility could be used as a tiebreaker, as well as the main ethical challenges associated with them. As we will show, an ethical justified use of responsibility as a tiebreaker is limited to a very restricted number of cases and is associated with a number of ethical concerns. For this reason, waiting time should be preferred as a tiebreaker in liver allocation, even though the criterion of waiting time, too, raises a number of equity-related concerns.

Liver Transplantation for the Nonhepatologist

Liver transplantation (LT) is a life-saving and evidence-based intervention for patients with acute liver failure and chronic end-stage liver disease. Significant progress has been made in advancing pre-LT management, transplant techniques, post-LT long-term care, and immunosuppression regimes. However, as rates of DC continue to increase, causes of liver disease and indications for LT continue to be investigated to ensure equity and further improve liver allocation models, waitlist outcomes, and post-LT outcomes for all patient populations.

The Baveno VII concept of cirrhosis recompensation

Traditionally, the progression from compensated to decompensated cirrhosis has been regarded as a point of no return in the natural history of the disease. However, this point of view is increasingly being challenged by new evidence on disease regression and hepatic recompensation upon suppression/cure of the underlying aetiology. In order to create a uniform definition of recompensated cirrhosis, standardised criteria have been set out by the Baveno VII consensus, which include the removal of the primary aetiological factor, the resolution of any decompensating events and a sustained improvement in hepatic function. Initial insights into the concept of hepatic recompensation come from previous studies, which have demonstrated that a cure/suppression of the underlying aetiology in patients with prior decompensation leads to significant clinical improvements and favourable outcomes and can even enable the delisting of transplant candidates. Nevertheless, future studies are required to shed light on the natural history of hepatic recompensation, assess modifying factors and potential non-invasive biomarkers of recompensation and explore the molecular mechanisms of disease regression.

Liver Transplantation in Alcohol-related Liver Disease and Alcohol-related Hepatitis

Alcohol-related liver disease (ARLD) remains one of the leading causes of chronic liver disease and the prevalence of alcohol-related cirrhosis is still increasing worldwide. Thus, ARLD is one of the leading indications for liver transplantation (LT) worldwide especially after the arrival of direct-acting antivirals for chronic hepatitis C infection. Despite the risk of alcohol relapse, the outcomes of LT for ARLD are as good as for other indications such as hepatocellular carcinoma (HCC), with 1-, 5-, and 10- year survival rates of 85%, 74%, and 59%, respectively. Despite these good results, certain questions concerning LT for ARLD remain unanswered, in particular because of persistent organ shortages. As a result, too many transplantation centers continue to require 6 months of abstinence from alcohol for patients with ARLD before LT to reduce the risk of alcohol relapse even though compelling data show the poor prognostic value of this criterion. A recent pilot study even observed a lower alcohol relapse rate in patients receiving LT after less than 6 months of abstinence as long as addictological follow-up is reinforced. Thus, the question should not be whether LT should be offered to patients with ARLD but how to select patients who will benefit from this treatment.

High-risk liver transplant recipients with grade 3 acute on chronic liver failure should receive the good quality graft

BACKGROUND & AIM

We aimed to develop a risk score for LT recipients and donor selection among patients with ACLF-3.

METHODS AND RESULTS

A total of 7166 adult LT recipients (mean age 53 years, 63% males, 56% Caucasians, 42% obese, median MELD score 36.5) using deceased donor grafts in the UNOS database (01/2002-06/2018) who were in ACLF-3 at LT as per EASL-CLIF criteria were analysed. Cox regression model on the derivation dataset (N = 3583) showed recipient age, non-alcohol aetiology, pulmonary failure, brain failure and cardiovascular failure to be associated with 1-year patient survival. Observed and expected post-transplant 1-year survival showed excellent correlation (R = .920). Risk score from cox model on derivation dataset stratified 3583 recipients in validation cohort using cut-off scores 7.55 and 11.57 to low (N = 1211), medium (N = 1168) and high risk (N = 1199), with 1-year patient survival of 89%, 82% and 80% respectively. Based on poor versus good quality graft (donor risk index cut-off at 1.50), 1-year patient survival for low, medium and high-risk categories were 90 versus 89% (p = .490), 83 versus 82% (p = .390) and 83 versus 78% (p = .038) respectively. Among recipients with a high-risk score, donor factors of age ≥60 years, grafts obtained from national sharing and macro-steatosis >15% were associated with 1-year patient survival below 66%.

CONCLUSION

Among ACLF-3 liver transplant recipients, those with high risk at the time of transplant receiving better quality graft will improve post-transplant outcomes. Prospective studies using additional characteristics are needed to derive an accurate risk score model in predicting post-transplant outcomes among recipients with ACLF-3.

Potential Bias and Misconceptions in Liver Transplantation for Alcohol- and Obesity-Related Liver Disease

INTRODUCTION

Bias and misconceptions surrounding alcohol-related liver disease (ALD) and obesity-related liver disease (OLD) may lead to transplant listing inequities. The aim of this study was to evaluate patients, medical students, residents, fellows, and attending physicians for bias and misconceptions regarding liver transplantation (LT) for patients with ALD and OLD.

METHODS

Participants took a survey asking them whether patients with ALD who continue/discontinue drinking alcohol or patients with OLD who do/do not commit to a weight loss program deserve equal LT rights. A Likert scale was used for their responses. Participants also estimated 5-year survival and advanced fibrosis recurrence after LT. The primary outcome of the study was bias measured by expected agreement or disagreement to questions using a Likert scale, significant underestimation of a 5-year survival rate after LT, and significant overestimation of 5-year advanced fibrosis recurrence after LT.

RESULTS

A total of 381 participants were included in the analysis: 153 residents/fellows, 31 attending physicians, 98 medical students, and 99 patients. A higher percentage from all 4 participating groups either were neutral or disagreed with equal LT rights for patients with ALD who discontinue drinking compared with patients with OLD who commit to weight loss program. The attending physician group was the only group with a majority estimating >60% 5-year survival after LT in patients with ALD and OLD (P < 0.05). All 4 groups had a majority estimate >20% 5-year advanced fibrosis recurrence in patients with ALD and OLD (P > 0.05).

DISCUSSION

There seems to be current bias and misconceptions regarding LT for patients with ALD and OLD.

A notable proportion of liver transplant candidates with alcohol-related cirrhosis can be delisted because of clinical improvement

BACKGROUND & AIMS

To what extent patients with alcohol-related decompensated cirrhosis can improve until recovery from decompensation remains unclear. We aimed to investigate the probability of recovery and delisting due to improvement in patients with alcohol-related decompensated cirrhosis on the waiting list (WL) for liver transplantation (LT).

METHODS

We conducted a registry-based, multicenter, retrospective study including all patients admitted to the LT WL in Catalonia (Spain) with the indication of alcohol-, HCV-, cholestasis- or non-alcoholic steatohepatitis-related decompensated cirrhosis between January 2007 and December 2018. Competing-risk analysis was used to investigate variables associated with delisting due to improvement in patients with alcohol-related decompensated cirrhosis. Criteria for delisting after improvement were not predefined. Outcomes of patients after delisting were also studied.

RESULTS

One-thousand and one patients were included, 420 (37%) with alcohol-related decompensated cirrhosis. Thirty-six (8.6%) patients with alcohol-related decompensated cirrhosis were delisted after improvement at a median time of 29 months after WL admission. Lower model for end-stage liver disease (MELD) score, higher platelets and either female sex or lower height were independently associated with delisting due to improvement, while time of abstinence did not reach statistical significance in multivariate analysis (p = 0.055). Five years after delisting, the cumulative probability of remaining free from liver-related death or LT was 76%, similar to patients with HCV-related decompensated cirrhosis delisted after improvement.

CONCLUSIONS

A significant proportion of LT candidates with alcohol-related cirrhosis can be delisted due to improvement, which is predicted by low MELD score and higher platelet count at WL admission. Women also have a higher probability of being delisted after improvement, partially due to reduced early access to LT for height discrepancies. Early identification of patients with potential for improvement may avoid unnecessary transplants.

LAY SUMMARY

Patients with alcohol-related cirrhosis can improve until being delisted in approximately 9% of cases. Low model for end-stage liver disease score and high platelet levels at admission predict delisting after improvement, and women have higher probabilities of being delisted due to improvement. Long-term outcomes after delisting are generally favorable.

Disease-specific waitlist outcomes in liver transplantation - a retrospective study

This study aimed to evaluate possible discrepancies in waitlist outcomes between liver diseases, including alcohol-related liver disease (ALD), nonalcoholic steatohepatitis (NASH), hepatitis C virus infection (HCV), primary biliary cirrhosis (PBC), and primary sclerosing cholangitis (PSC). Patients registered for liver transplantation from January 11, 2016, to June 30, 2018, were evaluated using OPTN/UNOS registry. Waitlist outcomes were compared between the five-disease groups. Patients were categorized by initial MELD-Na-score (6-20, 21-29, and ≥30) to identify outcome variations. Prognostic impact of transplantation was assessed according to final MELD-Na scores using Cox regression analysis modeling transplantation as a time-dependent covariate. 6053 with ALD, 3814 with NASH, 1558 with HCV, 602 with PBC, and 819 with PSC were eligible. Compared to ALD with comparable MELD-Na-scores, NASH with lower [adjusted hazard ratio (aHR) = 1.30, P = 0.042] and mid-scores (aHR = 1.35, P = 0.008) showed significantly higher risk of 1-year waitlist mortality, and PBC with higher scores showed significantly higher risk of 90-day (aHR = 1.69, P = 0.03) and 1-year waitlist mortality (aHR = 1.69, P = 0.02). Positive prognostic impact of transplantation was not seen until score of 24-27 in ALD, 18-20 in HCV, 15-17 in NASH, and 24-27 in PBC and PSC. There are significant differences in waitlist outcomes among etiologies, which may differ the optimal transplant timing.

Liver Transplantation for Alcoholic Liver Disease: What Is the Risk and Consequence of Relapse?

Although short- and medium-term outcomes after liver transplantation for alcohol-related liver disease (ARLD) are generally excellent and similar to outcomes for transplantation for other indications, a return to alcohol consumption commonly occurs even though rates of alcohol consumption after transplantation for ARLD are comparable to those seen in other indications. Transplant recipients should be questioned about alcohol use post-transplantation and, where appropriate, monitored; those drinking significant amounts should be offered treatment with the help of a multi-disciplinary team. Although short-term significant alcohol use is associated with an increased risk of non-compliance and rejection, medium-term outcomes are similar to other groups. Patients transplanted for ARLD have a greater risk of some de novo malignancies, especially of the lung and the upper GI tract. More work is required both to identify those at risk of a return to destructive patterns of alcohol use at an early stage and to develop effective treatments aimed at reaching and maintaining abstinence.

Liver transplant waitlist outcomes in alcoholic hepatitis compared with other liver diseases: An analysis of UNOS registry

There is growing interest in performing liver transplantation (LT) in patients with alcoholic hepatitis (AH) without a mandated abstinence period. The aim of this study is to investigate waitlist outcomes in AH patients compared to those with other liver diseases. Using data from the UNOS registry, adult patients listed for LT between 2009 and 2018 were evaluated. Waitlist outcomes were compared among liver diseases. A total of 64 646 patients were eligible, including 286 with AH, 16 871 with alcoholic cirrhosis (AC), 13 730 with hepatitis C (HCV), 10 315 with non-alcoholic steatohepatitis (NASH), and 5841 with cholestatic liver disease (CLD). In comparison with AH patients, patients with HCV, NASH, and CLD had a significantly higher risk of waitlist mortality and a lower likelihood of recovery on the waitlist. These trends were more prominent in the waiting-time period of 91-365 days than in shorter periods. In intention-to-treat analysis, positive prognostic effect of LT was significant in AH patients with MELD score ≥35 (HR 0.04, P < .001). AH patients showed lower mortality risk and a higher chance of recovery while on waitlist than other liver diseases, especially when waiting time exceeded 90 days. These results indicate the importance of continuous evaluation of disease progression in AH patients awaiting LT.