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Esophageal varices often manifest as gastrointestinal bleeding episodes, presenting symptoms like hematemesis (vomiting of blood), hematochezia (passing fresh blood via the rectum), and melena (black, tarry stools). Other signs can include weight loss, anorexia, abdominal discomfort, jaundice, pruritus, altered mental status, and muscle cramps.
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The hepatic portal system, a critical part of our circulatory framework, transports nutrient-laden, deoxygenated blood from the gastrointestinal tract and spleen to the liver. This ingenious system plays an indispensable role in maintaining our body's metabolic equilibrium.
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The biliary system of the liver, crucial for bile secretion and drug excretion, comprises intrahepatic bile ducts that merge to form the common hepatic duct. This duct, carrying hepatic bile, combines with the cystic duct, draining the gallbladder and forming the common bile duct, which empties into the duodenum. Bile, produced by hepatic cells lining the bile canaliculi, is composed primarily of water, bile salts, pigments, electrolytes, and lesser amounts of cholesterol and fatty acids. Bile...
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Effect of Hepatic Disease on Pharmacokinetics: Drug Dosing and Hepatic Blood Flow01:26

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Chronic liver disease significantly impacts drug metabolism due to alterations in hepatic blood flow and enzyme accessibility. This disruption affects the body's pharmacokinetics—the movement and processing of drugs within the system. Key enzymes crucial for metabolizing medications become less accessible, changing how drugs are processed and utilized. Furthermore, liver disease influences the synthesis of plasma proteins, such as albumin and globulins, which play critical roles in drug...
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A Cell Culture Model for Producing High Titer Hepatitis E Virus Stocks
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Hepatitis E, what is the real issue?

Hélène Larrue1, Florence Abravanel2, Jean-Marie Peron1

  • 1Service d'hépatologie Hôpital Rangueil CHU Toulouse, Université Paul Sabatier III, Toulouse, France.

Liver International : Official Journal of the International Association for the Study of the Liver
|May 11, 2021
PubMed
Summary
This summary is machine-generated.

Hepatitis E virus (HEV) infection causes millions of cases and deaths globally. Different HEV genotypes lead to distinct transmission routes and outcomes, necessitating varied diagnostic and treatment strategies.

Keywords:
acute viral hepatitischronic hepatitishepatitis E virusneurologic symptomsribavirinzoonosis

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Area of Science:

  • Hepatology
  • Virology
  • Infectious Diseases

Background:

  • Hepatitis E virus (HEV) is a significant global health concern, causing millions of symptomatic cases and tens of thousands of deaths annually.
  • It is primarily a waterborne disease in developing nations, linked to genotypes 1 and 2, causing outbreaks and high mortality in pregnant women and cirrhotic patients.
  • In developed countries, HEV genotypes 3 and 4 cause sporadic hepatitis through zoonotic transmission, with parenteral transmission via blood products emerging as a new concern.

Purpose of the Study:

  • To provide a comprehensive overview of Hepatitis E virus infection.
  • To highlight the global epidemiology and varying clinical presentations of HEV.
  • To discuss diagnostic approaches and current treatment and prevention strategies for HEV.

Main Methods:

  • Review of existing literature on Hepatitis E virus epidemiology, transmission, clinical manifestations, diagnosis, and treatment.
  • Analysis of data regarding HEV genotypes and their geographical distribution.
  • Examination of diagnostic methods including serological tests and molecular assays (PCR).

Main Results:

  • HEV causes an estimated 3.3 million symptomatic cases and 44,000 deaths yearly worldwide.
  • Genotypes 1 and 2 are associated with waterborne outbreaks in developing countries, disproportionately affecting young individuals and causing high mortality in pregnant women and cirrhotic patients.
  • Genotypes 3 and 4 are prevalent in developed countries, transmitted zoonotically, and can lead to chronic infections or neurological disorders, particularly in immunocompromised individuals.

Conclusions:

  • HEV infection presents diverse epidemiological patterns and clinical outcomes based on genotype and geographic location.
  • Accurate diagnosis relies on specific serological markers and molecular detection, with tailored approaches for immunocompetent and immunocompromised patients.
  • While ribavirin is the sole validated treatment for chronic HEV, a vaccine has been developed in China, offering a potential future prevention strategy.