Glycocholia – Causes, Symptoms and Treatment
Glycocholia refers to elevated bile acid levels in the blood or tissues. It occurs in liver diseases and bile duct disorders.
Wissenswertes über "Glycocholia"
Glycocholia refers to elevated bile acid levels in the blood or tissues. It occurs in liver diseases and bile duct disorders.
What is Glycocholia?
Glycocholia describes a condition in which bile acids – particularly conjugated bile acids such as glycocholic acid – are present at elevated concentrations in the blood or other body tissues. Bile acids are synthesised in the liver from cholesterol and play a central role in fat digestion in the small intestine. Under normal conditions, they are almost completely reabsorbed after secretion into the gut and returned to the liver via the enterohepatic circulation. When this cycle is disrupted, bile acids can enter the bloodstream in elevated amounts.
Causes
Glycocholia can be caused by various diseases and conditions that impair bile acid metabolism or bile flow:
- Liver diseases: In hepatitis, liver cirrhosis, or fatty liver disease, the liver has a reduced capacity to process bile acids.
- Bile duct obstruction: A mechanical blockage of the bile ducts (e.g., due to gallstones or a tumour) prevents normal bile flow and leads to reabsorption of bile acids into the blood.
- Intrahepatic cholestasis: Reduced bile secretion within the liver, e.g., caused by medications or during pregnancy (intrahepatic cholestasis of pregnancy), raises bile acid levels in the blood.
- Intestinal diseases: Conditions such as Crohn's disease affecting the terminal ileum can disrupt bile acid reabsorption and secondarily influence metabolism.
Symptoms
The clinical signs of glycocholia are often non-specific and depend on the underlying condition. Typical symptoms may include:
- Jaundice: Yellowing of the skin and eyes due to elevated bilirubin levels, which often occur simultaneously.
- Pruritus (itching): Deposition of bile acids in the skin causes intense itching.
- Dark urine and pale stools: Indicators of a bile duct disorder.
- Upper abdominal discomfort: Pain or pressure in the right upper abdomen.
- Nausea and loss of appetite.
Diagnosis
The diagnosis of glycocholia is made as part of a comprehensive assessment of liver and bile duct disorders:
- Blood tests: Measurement of serum bile acid concentrations, liver enzymes (ALT, AST, GGT, ALP), bilirubin, and cholestasis markers.
- Imaging: Abdominal ultrasound to assess the liver, gallbladder, and bile ducts; if needed, MRCP (magnetic resonance cholangiopancreatography).
- Liver biopsy: In certain cases, for histological confirmation of liver disease.
Treatment
Treatment of glycocholia is directed at the underlying cause:
- Treatment of the underlying disease: Antiviral therapy for viral hepatitis, immunosuppressive treatment for autoimmune hepatitis, surgical or endoscopic removal for gallstones.
- Ursodeoxycholic acid (UDCA): A bile acid preparation used in intrahepatic cholestasis, e.g., during pregnancy or in primary biliary cholangitis, to improve bile flow and reduce elevated bile acid levels.
- Symptomatic therapy: For severe itching, cholestyramine (a bile acid binder) or other antipruritic agents may be used.
- Dietary adjustment: A low-fat diet can help alleviate symptoms.
References
- Lammert F, Acalovschi M, Ercolani G et al. – EASL Clinical Practice Guidelines on the prevention, diagnosis and treatment of gallstones. Journal of Hepatology, 2016.
- Hofmann AF – Bile acids: The good, the bad, and the ugly. News in Physiological Sciences, 1999.
- World Health Organization (WHO) – Liver diseases: Global health perspectives. WHO Technical Report, 2022.
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Related search terms: Glycocholia + Glycocholy + Glykocholia