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Related Concept Videos

Overview of Advanced Functional Groups02:22

Overview of Advanced Functional Groups

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Functional groups are groups of atoms with specific chemical properties that occur within organic molecules and are sometimes denoted as “R”. Functional groups can “functionalize” a compound by enabling it to adopt different physical and chemical properties.
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Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
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In contrast to passive transport, active transport involves a substance being moved through membranes in a direction against its concentration or electrochemical gradient. There are two types of active transport: primary active transport and secondary active transport. Primary active transport utilizes chemical energy from ATP to drive protein pumps that are embedded in the cell membrane. With energy from ATP, the pumps transport ions against their electrochemical gradients—a direction...
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Related Experiment Video

Updated: Feb 15, 2026

Endoscopic Ultrasound-Guided Biliary Drainage: Endoscopic Ultrasound-Guided Hepaticogastrostomy in Malignant Biliary Obstruction
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[Research advances in primary biliary cholangitis].

W J Duan1, J D Jia

  • 1Liver Research Center, Beijing Friendship Hospital, Capital Medical University; Beijing Key Laboratory of Translational Medicine on Liver Cirrhosis; National Clinical Research Center for Digestive Disease, Beijing 100050, China.

Zhonghua Gan Zang Bing Za Zhi = Zhonghua Ganzangbing Zazhi = Chinese Journal of Hepatology
|January 12, 2018
PubMed
Summary
This summary is machine-generated.

Primary biliary cholangitis (PBC) is a chronic liver disease. While ursodeoxycholic acid is a common treatment, many patients show poor response, highlighting the need for new therapies like 6-ethylchenodeoxycholic acid.

Keywords:
DiagnosisPrimary biliary cholangitisTherapy

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Area of Science:

  • Hepatology
  • Immunology
  • Gastroenterology

Background:

  • Primary biliary cholangitis (PBC) is a chronic, cholestatic liver disease with unclear origins.
  • Anti-mitochondrial antibodies (AMA) are highly specific diagnostic markers for PBC.
  • Ursodeoxycholic acid (UDCA) is the primary treatment, but 40% of patients experience inadequate biochemical responses.

Purpose of the Study:

  • To review the current understanding of Primary Biliary Cholangitis (PBC) pathogenesis.
  • To evaluate the efficacy of existing and novel therapeutic agents for PBC.
  • To discuss the role of liver transplantation in end-stage PBC.

Main Methods:

  • Literature review of studies on PBC diagnosis and treatment.
  • Analysis of clinical trial data for ursodeoxycholic acid and 6-ethylchenodeoxycholic acid.
  • Review of guidelines and outcomes for liver transplantation in PBC.

Main Results:

  • High diagnostic accuracy of anti-mitochondrial antibodies in PBC.
  • Limited efficacy of ursodeoxycholic acid in a significant portion of PBC patients.
  • Emergence of 6-ethylchenodeoxycholic acid as a new treatment option.

Conclusions:

  • PBC remains a challenging condition with unmet therapeutic needs.
  • Novel agents like 6-ethylchenodeoxycholic acid offer improved treatment options.
  • Liver transplantation is crucial for managing end-stage PBC.