The Effect of Caffeine and Alcohol Consumption on Liver Fibrosis

A Study of 1045 Asian Hepatitis B Patients Using Transient Elastography

Arlinking Ong; Vincent Wai-SunWong; Grace Lai-Hung Wong; Henry Lik-Yuen Chan

Disclosures

Liver International. 2011;31(7):1047-1053. 

In This Article

Abstract and Introduction

Abstract

Background: Role of caffeine consumption in chronic hepatitis B virus (HBV)-infected patients and the interaction with alcohol consumption is unclear.
Aim: This study aimed to investigate the relationship between caffeine and alcohol consumption and liver stiffness in chronic HBV-infected patients.
Methods: Chronic HBV-infected patients who underwent transient elastography examination in 2006–2008 were studied. Advanced fibrosis was defined as liver stiffness >9 kPa for patients with normal alanine aminotransferase (ALT) or >12 kPa for those with elevated ALT according to previous validation study. Caffeine and alcohol consumption was recorded using a standardized questionnaire. Excessive alcohol intake was defined as 30 g/day in men and 20 g/day in women.
Results: The liver stiffness of 1045 patients who completed the questionnaire was 8.3 ± 6.2 kPa. Two hundred and sixteen (20.7%) patients had advanced fibrosis. Ninety-five (19.0%) patients who drank ≥1 cup of coffee had advanced fibrosis, compared with 121 (22.2%) patients who drank <1 cup (P=0.21). The amount of caffeine intake had positive correlation with the amount of alcohol intake (r s=0.167, P<0.001). Although 231 (22.1%) patients reported alcohol consumption, only 11 (1%) had excessive alcohol intake. The prevalence of advanced fibrosis among patients with mild to moderate alcohol intake (26, 18.8%) was comparable to that among non-drinkers (190, 21.0%) (P=0.57).
Conclusion: Caffeine intake does not affect liver stiffness in chronic HBV-infected patients. Patients who drink coffee regularly tend to drink alcohol. Most chronic HBV-infected patients do not have excessive alcohol consumption. The prevalence of advanced fibrosis among mild to moderate alcohol drinkers was low in this population.

Introduction

Chronic hepatitis B virus (HBV) infection is a global health problem affecting over 350 million people. Persistent hepatic inflammation because of chronic HBV infection will result in progressive liver fibrosis, which will eventually result in cirrhosis, hepatic decompensation and hepatocellular carcinoma (HCC).[1]

Alcoholism[2] is a primary chronic disease with genetic, psychosocial and environmental factors influencing its development and manifestations. Heavy alcohol consumption commonly causes alcoholic liver disease, cirrhosis and even HCC.[3] However, it is unclear whether consumption of a smaller amount of alcohol is safe in chronic hepatitis B patients.

On the other hand, consumption of coffee or caffeine may reduce liver injury. Greater coffee, and especially caffeine, intake was associated with a lower prevalence of abnormal alanine aminotransferase (ALT) activity in USA[4] and Japan.[5] Plasma glutathione was increased by 16% on coffee consumption in an Italian population.[6] In a prospective study among advanced Hepatitis C-related liver disease, regular coffee consumption was associated with lower rates of disease progression.[7] In human hepatoma cell lines, coffee and its major components (caffeine, cafestol and kahweol) alter expression and activity of enzymes involved in xenobiotic mechanisms.[8] Mice pretreated with cafestol and kahweol were protected from carbon tetrachloride toxicity by inhibiting cytochrome CYP 2E1,[9] an enzyme responsible for carbon tetrachloride bioactivation while caffeine specifically inhibited expression of connective tissue growth factor by interfering with transforming growth factor-β signaling through the SMAD pathway and upregulate peroxisome proliferator activated receptor γ levels. These in vitro and in vivo data suggested that caffeine has antifibrotic effects.[10]

A recent case control study among chronic hepatitis B carriers showed that coffee consumption reduced the risk of HCC by half with a significant dose-response effect.[11] It is uncertain if the beneficial effect is mediated through prevention of liver fibrosis and cirrhosis. In the past, large-scaled studies on risk factors of liver fibrosis and cirrhosis were difficult to conduct because the assessment required liver biopsy, which was invasive and not acceptable by all patients. In this study, we aimed to determine the effect of alcohol and caffeine consumption on the prevalence of advanced liver fibrosis among chronic HBV-infected patients using transient elastography.

Comments

3090D553-9492-4563-8681-AD288FA52ACE
Comments on Medscape are moderated and should be professional in tone and on topic. You must declare any conflicts of interest related to your comments and responses. Please see our Commenting Guide for further information. We reserve the right to remove posts at our sole discretion.
Post as:

processing....