Transplantation for alcoholic liver disease
Article Outline
- 1. Introduction
- 2. Alcohol use, alcohol abuse and alcohol dependence
- 3. Natural history of alcohol excess
- 4. Risk factors for the development of ALD
- 5. Indications for transplantation for patients with alcohol related chronic liver disease
- 6. Alcoholic hepatitis
- 7. Alcohol excess and other liver diseases
- 8. Abstinence and liver transplantation
- 9. Need for abstinence pre-transplantation?
- 10. Investigation of patients with ALD for liver transplantation
- 11. Ethical issues
- 12. Outcome after liver transplantation
- 13. Quality of life
- 14. Support for the allograft recipient and monitoring of abstinence
- 15. Conclusions
- References
- Copyright
1. Introduction
Alcoholic liver disease (ALD) is now the commonest indication for liver transplantation and has accounted for 5716 transplants in Europe between January 1988 and June 2000 [1]; however, it remains controversial. The proportion of patients grafted for ALD in Europe is overall 17%; however, both the proportion of patients grafted for alcohol-related liver disease and the absolute number of patients grafted has risen; there is great variation between countries (from 0% (in Poland) to 30% (in Spain)) (Fig. 1). Survival after transplantation for ALD is possible (5 and 10-year survival rates are 67 and 55% (graft survival) and 71 and 59% (patient survival)) [1] which is similar to those for other indications although this does not necessarily imply that the outcome is as good in the two groups since there may be considerable differences in case-mix. There is no doubt that a small proportion of patients return to a damaging pattern of drinking but the number of grafts lost through a return to drinking is, at least according to published reports, small [2].

Fig. 1.
(A) Number of liver transplants done in Europe according to the ELTR [1] and the proportion done for ALD. Total number of transplants: ALD 5723 (17%), others 27057. (B) The evolution of transplantation for patients with ALD. The number of patients transplanted in Europe for cirrhosis by year and the proportion of patients grafted for ALD (lower shaded area); data from ELTR [1].
The European Association for the Study of the Liver (EASL) and European Liver Transplant Registry (ELTR) organised a workshop to draw up guide-lines to clarify the role of liver transplantation in the management of patients with ALD. In this report from the workshop, we describe the patterns of alcohol use, those factors which may affect susceptibility as well as the indications for liver transplantation in patients with ALD and discuss the need and extent of abstinence required before transplantation. In order to manage patients optimally and to make most effective use of the scarce availability of donor livers, it is important that transplant clinicians understand and agree the patterns, causes and extra-hepatic consequences of alcohol excess and the possible role of therapies.
2. Alcohol use, alcohol abuse and alcohol dependence
While there is some evidence that modest alcohol consumption may be beneficial for survival, excessive alcohol consumption is associated with not only significant morbidity and mortality but also with physical, psychological and social disability [3]. Classification of the pattern of alcohol abuse is important for appropriate assessment and management of the potential liver transplant candidate.
Alcohol consumption can be classified into none, light, moderate and heavy. Heavy consumers can be considered as either abusers or dependent [4]. Abuse runs a different course to dependence and there is no evidence that abuse leads to dependence [5], [6]. There is a close relationship between alcohol dependence and psychiatric problems, although it is not clear whether this represents a causal relationship, a common basis or an independent effect. Antisocial personality disorder, depression, anxiety and psychotic syndromes are common. Several typologies for alcohol dependent/abusing patients have been developed, but empirical support for these classifications remains contradictory.
It is important to define relapse or recidivism: some Units will define relapse as any alcohol consumed, others define relapse as consuming over a set amount (such as 21 units/week for males and 14 units/week for females). In the non-transplant setting, addiction specialists define a relapse as more than 4 units/day or any alcohol consumed daily on 4 or more consecutive days. A return to alcohol consumption at a lower rate is defined as a ‘slip’.
There are two major diagnostic systems used to define alcohol dependence, ICD-10 and DSM-IV. While there is reasonably good agreement between the two systems for the classification of alcohol dependence, there is poor agreement with respect to abuse or harmful use [7], [8], [9]. Attempts to define the severity of alcohol dependence have been largely unsuccessful and the severity criteria present in DSM-IIIR have been removed from DSM-IV.
3. Natural history of alcohol excess
It is assumed by many that the natural history of people with alcohol dependence is one of progressive alcohol consumption: however, this view is not supported by the data available:
Thus, in many cases there is a wide discrepancy between clinicians' beliefs and reality (Table 1) and clarification of misconceptions will help inform the debate as to the appropriateness and the indications for orthotopic liver transplantation in patients with ALD.
Table 1. Some common misconceptions about alcohol dependency
| Belief | Reality |
|---|---|
| Alcoholism is a problem of current times | Alcoholism has been present throughout history |
| Alcoholics are social drop-outs | Only 5% alcoholics conform to this phenotype |
| Alcoholism is self-inflicted | Strong evidence for genetic and environmental influences |
| Alcoholics have specific personality traits | Alcoholics have a varied profile |
| Alcoholics will be detected and treated by the medical system | Patients with alcohol dependence are usually undetected and not treated |
| There is a low probability of recovery | There is a natural recovery of more than 60% |
| Relapse rates increase with time | Relapse is most common in the first year |
| To recover, absolute abstinence is needed | There is evidence that dependency may be overcome without total abstinence |
There are several approaches to help the patient become and stay abstinent and selection of the most appropriate approach is important in determining the outcome. Several factors have been identified which help predict abstinence (Table 2).
Table 2. Predictors of relapse
| Affective | Negative mood states |
Behavioural | Poor coping skills |
| Poor social skills | |
Cognitive | Negative attitude for recovery |
| Poor self perception | |
| Poor perception of illness | |
| Low level of cognitive functioning | |
Interpersonal | Lack of social support |
| Social pressures | |
| Lack of involvement in leisure activities | |
| Lack of productive work | |
Physiological | Craving for alcohol |
| Chronic illness and/or pain | |
Psychiatric | Co-morbidity |
Spiritual | Excessive guilt |
| Lack of purpose | |
Treatment | Negative attitude of care-givers |
| Inadequate after-care | |
| Lack of integrated services for support |
4. Risk factors for the development of ALD
While it is clear that there is a close correlation between both the amount of alcohol consumed and the duration of alcohol consumption and the probability of developing severe liver damage within a population, between individuals, there is a great variation. Both the risk of developing alcohol dependence and progressive liver damage are multi-factorial.
4.1. Pattern of drinking
The pattern of drinking influences the probability of developing liver disease. The development of liver disease is more common when drinking outside meal times (RR 3.4), multiple drinks (RR 23) [21] and daily compared to week-end drinking (RR 2.5) [22].
4.2. Gender
Females are more susceptible than males, reasons for which are not clear but may be related to the effects of oestrogen on intestinal permeability to endotoxin.
4.3. Diet
Obesity itself is a major factor for ALD; there is an increased risk in obese drinkers (BMI>25 for females and >27 for males) (RR2.15 for cirrhosis) [23]. The reasons for this are unclear but most likely reflect the close association between obesity and steatosis [24]. Data largely derived from animal studies suggest that diets that are low in carbohydrate, high in polyunsaturated fat and iron and/or deficient in antioxidant vitamins and trace elements may all lead to an increased susceptibility to ALD.
4.4. Genetic
Studies of alcoholism and ALD in twins have shown a clear genetic component to susceptibility with a concordance rate increased two- to three-fold higher in monozygotic compared to dizygotic twin pairs [25]. Relevant genes have not yet been identified.
Thus, both environmental and genetic factors are implicated in susceptibility to ALD: some can be altered by the individual, other factors may be altered by transplantation and others will remain host dependent. Knowledge of these various factors may help the patient manage their risk factors better after transplantation.
5. Indications for transplantation for patients with alcohol related chronic liver disease
The indications for transplantation for the patient with cirrhosis of any aetiology have been identified by several groups (see Minimal Listing Criteria [26], BSG Guidelines [27]). Development of the clinical or serological features of end-stage disease are now relatively well defined and include such general features as Child grade B or C, intractable encephalopathy or variceal bleeding; while most centres give for indications a poor quality of life (because of liver disease) or anticipated length of life less than 1 year, it is clear from modelling evaluations both in France and in the UK that for most patients with ALD, the anticipated survival without transplantation is between 50 and 80% at 1 year [28], [29]; indeed it is not until 3 or more years after transplantation that there is a clear survival benefit, and as might be anticipated, survival benefit is greatest in those who are the sickest. Thus, either the models are inaccurate or further work is needed to define when transplantation is required in this group of patients.
6. Alcoholic hepatitis
A particular problem exists for patients with alcoholic hepatitis: these patients are often very sick with renal failure and malnutrition; the probability of survival without transplantation is very low. The Maddrey Discriminant function [30] will help identifying those with a poor prognosis: those values that predict a poor survival without transplantation (serum bilirubin and clotting time) are also associated with a poor outcome after transplantation. There is only limited experience of transplantation in such patients: although there have been isolated cases where there has been excellent survival [31] and some [32], [33] have reported good outcomes, although others [34] have suggested that there may be a rapid return to a damaging pattern of alcohol consumption. Until more patients have been studied, we feel that this is not a routine indication for transplantation outside a controlled study.
7. Alcohol excess and other liver diseases
Patients with ALDs often have co-existing liver disease: this increased association may reflect a common behavioural pattern (such as other substance abuse leading to chronic viral infection), or this may reflect the increased susceptibility to alcohol in patients with chronic liver disease (such as chronic hepatitis B or C viral infection or genetic haemachromatosis, or, more rarely, porphyria cutanea tarda). Where other causes for liver disease are present, appropriate additional investigations may be warranted.
7.1. Hepatitis C viral (HCV) infection and alcohol
The liver disease most commonly associated with ALD is chronic HCV infection. Those with HCV who drink more than 50
g alcohol/day develop cirrhosis more rapidly than those with a lower alcohol consumption [35]. Clinically, those with both HCV and ALD tend to resemble those with ALD alone rather than HCV alone (Table 3) with respect to age, gender and severity of disease, although liver cell cancer is more common in those with HCV alone or HCV and ALD compared to those with ALD alone. In general, however, liver allograft recipients with a combined cause for end-stage liver disease tend to be considered as HCV rather than ALD. Post-transplant, the survival of patients grafted for ALD appears, at least in the short-term (<4 years), similar to those grafted for ALD and HCV [36]. However, those with combined ALD and HCV have considerably more graft fibrosis (Fig. 2) [54], [55] and therefore the long-term graft survival is likely to be less in these patients; indeed, some centres are already observing this.
Table 3. Pre-transplant clinical variables in patients with ALD, chronic HCV associated liver disease and botha
| ALD alone | ALD+HCV | HCV alone | |
|---|---|---|---|
| N | 131 | 38 | 238 |
| Age (years) | 50 (30–64)1 | 50 (31–64)2 | 57 (25–67)3 |
| Male (%) | 85.54 | 925 | 55.56 |
| Child class C (%) | 34.57 | 408 | 289 |
| HCC (%) | 1110 | 2611 | 2812 |
a Data from Hospital La Fe, Valencia, Spain. 1991–2000 (unpublished). Ages are shown as median (range). HCC, hepatocellular carcinoma. P values: 1 vs. 2: P NS; 2 vs. 3: P<0.0001; 1 vs. 3: P<0.0001; 4 vs. 5: P NS; 5 vs. 6: P<0.0001; 4 vs. 6: P<0.0001; 7 vs. 8: P NS; 8 vs. 9: P=0.08; 7 vs. 9: P NS; 10 vs. 11: P=0.01; 11 vs. 12: P NS; 10 vs. 12: P<0.0001. |

Fig. 2.
Prevalence of severe hepatic fibrosis in patients at 1 and 5 years after liver transplantation for HCV infection, ALD or both (data (unpublished) from Hospital La Fe, Valencia, Spain.
8. Abstinence and liver transplantation
The greatest concerns about transplanting patients with ALD are related to abstinence before and after transplantation: in particular, there are concerns that the patient will return to the previous pattern of alcohol abuse which could result in graft loss or patient death because of, for example, non-compliance with immunosuppressive therapy, a direct hepatotoxic effect of alcohol on the graft or extra-hepatic alcohol-induced organ damage. There are, however, few reports in the literature of graft loss for these reasons. The two concerns are primarily whether there is a need for the patient to be abstinent pre-transplantation and if so, for how long, and whether the patient should be abstinent after transplantation.
9. Need for abstinence pre-transplantation?
Most centres in Europe and in North America have adopted a rule requiring 6 months abstinence before patients are accepted for listing, although relatively few centres follow their own guidance in all instances [2], [44], [51], [52]. The rationale for this approach is that a period of abstinence pre-transplant will
However, more recently, the need for a set period of abstinence has been questioned on the basis of a number of observations:
Thus, while most guide-lines suggest that there should be a fixed period of abstinence it is clear that the basis for this is not firm. A reasonable practice is to wait until the patient can be fully evaluated by a multi-disciplinary team to ensure that there is a minimal risk of relapse and that suitable support will be provided, and to ensure that, with abstinence, the patient will not improve to an extent that transplantation is no longer needed.
10. Investigation of patients with ALD for liver transplantation
Alcohol will not only affect the liver but also other organs including heart, central and peripheral nervous system, the bone marrow and pancreas. Whether additional investigations are required for potential liver allograft recipients remains uncertain. There are few prospective data on the prevalence of significant extra-hepatic alcohol-related organ damage in candidates for liver replacement and there is little agreement on either the definitions or the contra-indications for liver transplantation. Furthermore, it may be difficult to distinguish organ dysfunction as a consequence of cirrhosis from that due to alcohol.
10.1. Cardiac disease
The current practice in European Transplant Centres suggest that most use echocardiography and electrocardiography on a routine basis and about half use exercise or dobutamine stress tests. Radionucleotide or invasive testing is not routinely undertaken. Although most centres regard cardiomyopathy as a relative contra-indication for transplantation, the limits of left ventricular ejection fraction below which transplantation is contra-indicated vary widely, from 20 to 50%. Ongoing studies by Fleig (unpublished) and by Kryzhanovski and Betler [37] suggest that routine testing to exclude cardiomyopathy does not appear to be justified in asymptomatic patients.
10.2. Neurological disease
Alcohol may be associated with both central damage (such as Wernicke–Korsakoff syndrome, dementia, cerebral atrophy and haematomas) and peripheral damage (motor, sensory or autonomic neuropathy). Clearly, significant irreversible brain damage will contra-indicate liver transplantation although there is no clear guidance as to the extent of cerebral damage that will preclude a successful outcome. Peripheral neuropathy does not seem to be associated with an adverse outcome; autonomic neuropathy is not uncommon in patients with end-stage liver disease, irrespective of aetiology, and improves after transplantation. While there is little evidence that neuropathy is associated with an adverse outcome, because there are few prospective studies, it cannot be assumed that neuropathy has no effect on outcome.
10.3. Nutrition
Malnutrition is associated both with end-stage liver disease and alcohol excess, and is associated with a poor outcome after transplantation. However, there is no evidence that those with alcohol-associated liver disease should be assessed and managed any differently from those with other causes for the end-stage liver disease.
10.4. Cancer
Patients grafted for ALD appear to have a higher incidence of some malignancies following liver transplantation, especially of the upper airway and upper gastrointestinal track: these factors should be considered in the routine assessment of patients for ALD [56], [57].
11. Ethical issues
The shortage of donor organs, despite the greater use of living related donors, splitting livers and use of marginal donors, means that not all those patients who could benefit from liver replacement are able to receive a graft and thus some form of rationing is needed. The cornerstone of medical ethics lies in four principles: justice, non-maleficence, patient autonomy and beneficence. The outcome of patients grafted for ALD clearly demonstrates beneficence but there remains a concern about justice. Certainly where the views of the public have been canvassed, it has been found that the public, who in the broadest sense, provide both the donor livers and the resources for transplantation, do rate liver allograft recipients with ALD at low priority. It remains a matter of debate the extent to which health care professionals should heed rather than lead the views (or prejudices) of the public. Some have argued that patients with ALD should not have the same claim on the limited donor pool as others with chronic liver disease not because the patients are responsible for their alcohol dependence but because they have not sought help: it was found that only 22% people with alcohol dependence sought help in a 1-year period [38], and conversely, fewer than one in eight substance abusers received formal treatment for drug and alcohol problems [39], [40].
12. Outcome after liver transplantation
The overall medium term outcome of patients transplanted for ALD is similar to that of patients grafted for other conditions; however, these findings must be interpreted with caution. For example, it has not been shown that there is a similar case-mix between those recipients with and without ALD and therefore simple comparisons may be simplistic and inappropriate. Equally, these data could imply that the rate of graft loss from HCV infection (at present, not always preventable) may be similar to that from a return to alcohol abuse (which could be prevented by better identification of suitable candidates). The world-wide shortage of donors means that not every patient who could benefit from liver replacement can be offered a graft and therefore transplant clinicians have to use their judgement to select appropriate candidates.
13. Quality of life
The quality of life after liver transplantation for any indication shows improvement in all domains [41], [42] and similar findings have been reported for patients grafted for ALD [43], [44], [45]: similar finds are seen whether the patient is abstinent or not [46], [47]. One study has suggested that while there was no difference in quality of life in those grafted for ALD, whether or not they returned to alcohol consumption, those who did drink three or more units daily had more sleep problems and were more likely to use benzodiazepines [47].
14. Support for the allograft recipient and monitoring of abstinence
Most, if not all, centres provide multi-disciplinary support for all patients on the waiting list and after transplantation. Patients with ALD do require additional support but there are no controlled data as to the most effective form of support for these patients. The range of effective support strategies for patients with ALD remains poor, and even in this highly selected cohort of patients, relapse is common. Therapeutic interventions for alcoholism which are efficacious in standard addiction studies may not be effective in the liver transplant population [48], [49]. However, one group [43] did report a significant reduction in a return to alcohol after a psychologist became involved in the management of patients before and after transplantation [53]. Further studies are needed to determine better methods to assist those with ALD who awaiting or following transplantation maintain abstinence.
There have been a few studies evaluating methods of monitoring abstinence. Standard liver tests are unhelpful as they are non-specific: carbohydrate-deficient transferrin may be of help [50]. Measurement of breath, blood or urine alcohol has been used in some centres in Europe but their role is, at best, limited.
15. Conclusions
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© 2002 European Association for the Study of the Liver. Published by Elsevier Inc. All rights reserved.
