SciCombinator

Discover the most talked about and latest scientific content & concepts.

Concept: Liver transplantation

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Portal hypertension is a common complication of chronic liver diseases and is responsible for most clinical consequences of cirrhosis, which represent the more frequent causes of death and liver transplantation in these patients. This review is aimed at clarifying the state-of-the art assessment of portal hypertension and at discussing recent developments in this field. Particular attention is paid to new noninvasive techniques that will be soon available for potential routine use.

Concepts: Medicine, Death, Medical terms, Cirrhosis, Liver, Hepatology, Hepatic portal vein, Liver transplantation

165

Trimethoprim-sulfamethoxazole (TMP-SMZ) is a commonly used antibiotic that has been associated with drug rash with eosinophilia and systemic symptoms (DRESS) syndrome. DRESS syndrome is characterised by fever, rash, lymphadenopathy, eosinophilia and one or more major organ involvement. Although rare, TMP-SMZ is a recognised cause of fulminant hepatic failure. We report a case of a 17-year-old Chinese, male adolescent who presented with fever, myalgia, generalised maculopapular rash and lymphadenopathy after taking TMPSMZ for acne vulgaris. He subsequently developed hepatic encephalopathy and was worked up for urgent liver transplantation. He responded well to extracorporeal liver dialysis (originally intended as a bridging therapy) and subsequently recovered without the need for liver transplantation. This case report highlights the importance of early recognition of TMPSMZ-induced DRESS syndrome and the need for early discontinuation of the drug in the affected patient. Extracorporeal liver dialysis and transplantation should be considered in the management of TMP-SMZ-induced fulminant hepatic failure.

Concepts: Medical terms, Cirrhosis, Liver, Hepatology, Liver transplantation, Hepatic encephalopathy, Liver dialysis, Acute liver failure

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Liver cirrhosis is a large burden on global health, causing over one million deaths per year. Observational studies have reported an inverse association between coffee and cirrhosis.

Concepts: Scientific method, Cirrhosis, Liver, Bilirubin, Hepatitis C, Hepatic portal vein, Liver transplantation, Names of large numbers

28

HCV-related cirrhosis represents the leading indication for liver transplantation in the Western countries. HCV reinfection after liver transplantation occurs in virtually all patients transplanted for HCV-related liver disease Histological evidence of chronic HCV infection develops in 50 to 90 % of patients by 12 months after liver transplantation, and cirrhosis occurs in about 20 % of patients within 5 years after transplant. Several studies have evaluated host, viral, and transplant-related factors that might be associated with the severity of HCV recurrence. Among host factors, immunosuppression is one of the major factors that accounts for accelerated HCV recurrence and it has been an area of extensive research and controversy. Donor age, steatosis, and immunogenetic factors are also relevant in determining the outcome in patients transplanted for HCV-related cirrhosis. A major step to prevent complications of HCV recurrence related to the rapid fibrosis is the posttransplant antiviral treatment. Two strategies have been tried: pre-emptive or other strategies as soon as possible after liver transplantation or elective therapy once there is histological evidence of recurrent hepatitis C. Retransplantation due to graft failure from recurrent hepatitis C is rarely an option in the era of organ shortage as it is associated with poor outcome, but many case needs to be considered early in the evolution of disease. New antivirals may change the outcome dramatically of patients transplanted for HCV cirrhosis.

Concepts: Cirrhosis, Liver, Hepatocellular carcinoma, Hepatology, Organ transplant, Hepatitis C, Hepatitis B, Liver transplantation

28

Tacrolimus is a widely used immunosuppressive drug in organ transplantation. The oral bioavailability of tacrolimus varies greatly between individuals and depends largely on the activity of both the cytochrome P450 3A (CYP3A) subfamily and P-glycoprotein (P-gp). The possible influence of single nucleotide polymorphisms (SNPs) of CYP3A subfamily and P-gp (MDR-1) in liver transplant recipients has recently been indicated as one of the most important variables affecting the pharmacokinetics of tacrolimus and the renal injury induced by tacrolimus.

Concepts: DNA, Single-nucleotide polymorphism, Cytochrome P450, Organ transplant, Pharmacokinetics, CYP3A4, Liver transplantation, Grapefruit juice

28

Liver resection offers a chance of cure for patients with hepatocellular carcinoma (HCC). Hepatic pedicle clamping (HPC) is commonly used to reduce blood loss during hepatectomy. Hepatic ischemia-reperfusion (I/R) injury has recently been reported to be a major factor in accelerated tumor growth. We therefore evaluated the effect of intermittent HPC on the prognosis of patients after liver resection.

Concepts: Cancer, Iron, Red blood cell, Cirrhosis, Platelet, Insulin-like growth factor 1, Hepatitis C, Liver transplantation

28

We sought to investigate the perioperative inflammatory response and immunological function of patients with portal hypertension-induced splenomegaly who underwent laparoscopic (LS) or open splenectomy (OS).

Concepts: Immune system, Cirrhosis, Liver, Bilirubin, Hepatitis C, Hepatic portal vein, Splenomegaly, Liver transplantation

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Every month, new releases on the relationship between pharmacogenetic biomarkers and immunosuppressive drug therapy in kidney transplantation are published. However, the systematic clinical application of these discoveries occurs at a very slow pace, and the usefulness of knowing a patient’s genotype remains an important matter of debate. This can be partially ascribed to the lack of consistency when looking at the different associations reported across several studies but also the need for a broad-spectrum view and a rigorous analysis of the relevance of the different associations observed to date. For that purpose, we performed a comprehensive analysis of the strength of the different reported genetic associations, and in this article we discuss their potential for clinical implementation in kidney transplantation. For tacrolimus, it is likely that a genotype-based drug dosage can benefit patient outcome, while for ciclosporin A, the data appear less convincing. For the mammalian target of rapamycin inhibitors, sirolimus and everolimus - given the lack of data and the absence of large prospective studies - it is premature to implement pharmacogenetics, but some novel and promising leads have recently been reported. For mycophenolate mofetil, the complex metabolic pathways of its active moiety, mycophenolic acid, complicate analysis of the various published associations. However, at present, some interesting findings can be highlighted and offer potential value to assist clinicians in decision making.

Concepts: Pharmacology, Kidney transplantation, Transplant rejection, Immunosuppressive drug, Immunosuppressants, Mycophenolic acid, Mycophenolate mofetil, Liver transplantation