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Related Experiment Videos

Hepatitis E virus: cDNA cloning and expression.

T Uchida1, K Suzuki, N Hayashi

  • 1Department of Pathology, Nihon University School of Medicine, Tokyo, Japan.

Microbiology and Immunology
|January 1, 1992
PubMed
Summary
This summary is machine-generated.

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Researchers cloned viral hepatitis E genome fragments to develop an antibody assay. This breakthrough aids in diagnosing hepatitis E, a virus causing frequent outbreaks in developing nations.

Area of Science:

  • Virology
  • Immunology
  • Molecular Biology

Background:

  • Viral hepatitis E is a significant public health concern, endemic in many developing countries and causing frequent epidemic outbreaks.
  • Accurate diagnostic tools are crucial for managing and controlling the spread of this infectious disease.

Purpose of the Study:

  • To clone the viral genome of hepatitis E.
  • To develop an antibody assay system for diagnosing hepatitis E.

Main Methods:

  • Construction of a lambda gt11 cDNA library from bile juice containing the virus.
  • Immunoscreening of the library using antisera from infected patients and monkeys.
  • Isolation and sequencing of three overlapping virus-specific cDNA clones (1,459 nucleotides total).
  • Immunoplaque assay to detect antibodies against the synthesized polypeptides.

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Main Results:

  • Three overlapping cDNA clones of the hepatitis E virus genome were successfully isolated.
  • These clones encode polypeptides with common immunological epitopes.
  • Antibodies against these epitopes were detected in convalescent-phase monkeys and in human sera from Myanmar, Nepal, and India.
  • The identified cDNA fragments are suitable for immunodiagnosis.

Conclusions:

  • The cloned cDNA fragments of the hepatitis E virus are valuable tools for developing an effective immunodiagnostic assay.
  • This advancement can significantly improve the diagnosis and management of viral hepatitis E, particularly in outbreak-prone regions.