Acute liver failure: a message found under the skin

Adolescent With Acute Liver Failure in the Setting of Ethanol, Cocaine, and Ecstasy Ingestion Treated With a Molecular Adsorbent Recirculating System

Recreational polypharmacy intoxication is a popular trend, particularly among adolescents and young adults. Acute liver failure is an uncommon complication of drug intoxication and has been described separately among patients intoxicated with ethanol, cocaine, and 3,4-methylenedioxy-methamphetamine (MDMA, ecstasy). Many patients with acute liver failure will die without liver transplant, and management of drug-induced acute liver failure is complicated by the fact that polysubstance abuse may be a contraindication for liver transplant, even among young patients.

Here we report a case of acute liver failure in an adolescent male secondary to recreational intoxication with ethanol, cocaine, and ecstasy. This patient was not a candidate for liver transplantation. We describe successful treatment using a molecular adsorbent recirculating system (MARS®) or “liver dialysis” and review the literature pertaining to management options for this type of patient.

Adipose-derived stem cell-based treatment for acute liver failure

INTRODUCTION

Acute liver failure (ALF) is a highly lethal disease, for which effective therapeutic methods are limited. Although allogeneic liver transplantation is a viable treatment method for ALF, there is a serious shortage of liver donors. Recent studies suggest that stem cell transplantation is a more promising alternative. Hence, we investigate whether human adipose-derived stem cells (ASCs) have the therapeutic potential for ALF in this study based on the studies of rat models.

METHODS

Sprague Dawley rats were used to establish ALF models by D-galactosamine injection. These rats were randomly divided into a human ASC-treated group and a phosphate-buffered saline (PBS) control group. The human ASCs or PBS was transplanted through the spleen of rats. The indices of hepatic function and hepatic histology were dynamically detected, and the survival rates of rats were also counted. Double-fluorescence immunohistochemistry was employed to detect the ASC fate after transplantation. Moreover, both concentrated ASC conditional media and ASC lysates were transplanted through the femoral vain of rats to investigate the therapeutic potential for ALF.

RESULTS

The ASC transplantation group showed improved viability in comparison with the sham control. Histological and biochemical analysis suggested that liver morphology and function were improved in terms of cell proliferation and apoptosis. Although a plethora of ASCs persist in the spleen, the improvement in liver function was obvious. However, ASCs did not differentiate into hepatocytes after engrafting to livers within 3 days. In addition, both concentrated serum-free ASC conditional media and ASC lysates, characterized by high levels of hepatocyte growth factor and vascular endothelial growth factor, demonstrated obvious improvement in terms of high survival rates of ALF rats.

CONCLUSION

Our data suggest that ASC transplantation has the potential for ALF treatment partly by the mechanism of secreting growth factors contributing to liver regeneration.

Present status and perspectives of cell-based therapies for liver diseases

In recent years the interest in liver cell therapy has been increasing continuously, since the demand for whole liver transplantations in human beings far outweighs the supply. From the clinical point of view, transplantation of hepatocytes or hepatocyte-like cells may represent an alternative to orthotopic liver transplants in acute liver failure, for the correction of genetic disorders resulting in metabolically deficient states, and for late stage liver disease such as cirrhosis. Although the concept of cell therapy for various diseases of the liver is widely accepted, the practical approach in humans often remains difficult. An international expert panel critically discussed the recent published data on clinical and experimental hepatocyte transplantation and the possible role of stem cells in liver tissue repair. This paper aims to summarise the present status of cell based therapies for liver diseases and to identify areas of future preclinical and clinical research.

Liver transplantation for acute hepatic failure

There are numerous causes of acute hepatic failure (AHF). Cerebral edema, coagulopathy, renal failure, metabolic disturbances and infection are the main clinical sequelae. Patients with AHF should be stabilized when first encountered and transferred to the nearest liver transplant center, as AHF progresses quickly and is often fatal. There are few adequate medical interventions and care of patients with AHF is supportive until spontaneous recovery ensues. If recovery does not appear to occur, most causes of AHF are well accepted indications for liver transplantation.

Integrating care for patients with infectious, psychiatric, and substance use disorders: concepts and approaches

Patients with chronic viral infections such as HIV/AIDS or hepatitis C often have multiple co-existing problems such as psychiatric and addictive disorders, as well as social problems such as lack of housing, transportation and income that present challenging obstacles to successful management. Because services for these different problems are usually provided by different disciplines in varying locations, fragmentation of care can lead to treatment dropouts, lack of adherence, and poor outcomes. Integration strategies, ranging from simple efforts to improve communication and coordinate care to fully integrated multidisciplinary teams have been used to improve disease management. Although evidence for effectiveness is comprised primarily of observational studies of demonstration programmes, integration may be desirable on a pragmatic basis alone. Quality improvement strategies are attractive vehicles for implementing care integration and measuring its impact. Careful assessment of the problem to be solved and the development of targeted strategies will maximize chances of a successful outcome.