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Updated: Jun 24, 2026

A Cell Culture Model for Producing High Titer Hepatitis E Virus Stocks

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Published on: June 26, 2020

Hepatitis D: thirty years after.

Mario Rizzetto¹

¹Division of Gastroenterology, Molinette-University of Turin, Corso Bramante, Turin 10126, Italy. mrizzetto@molinette.piemonte.it

Journal of Hepatology

|March 17, 2009

Summary

The discovery of Hepatitis D Virus (HDV) revealed it as a defective virus requiring Hepatitis B Virus (HBV) for infection. This finding opened new research avenues into HDV

Area of Science:

Virology
Hepatology

Background:

The delta antigen and antibody were observed in Hepatitis B surface antigen carriers in the 1970s.
Initially mistaken as an HBV marker, its true nature remained elusive.

Purpose of the Study:

To detail the discovery and classification of the Hepatitis D Virus (HDV).
To review research progress in HDV's mechanisms, impact, and therapy over 30 years.

Main Methods:

Collaboration between Italian and US research groups.
Chimpanzee experiments to elucidate the delta antigen's origin.

Main Results:

Demonstrated HDV is a distinct defective virus, not an HBV component.
Established HDV requires HBV for infection and transmission.

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Proposed HDV's pathogenic role in HBV-infected individuals.

Conclusions:

HDV discovery revolutionized understanding of viral hepatitis.
Research has focused on HDV replication, epidemiology, and therapeutic strategies.