Persistent infection of a human lymphocyte cell line (Molt-4) with the kilham rat virus

Area of Science:

• Virology
• Cell Biology
• Immunology

Background:

• Understanding persistent viral infections is crucial for developing effective therapeutic strategies.
• The Kilham rat virus (KRV) is a parvovirus known to infect rodents, but its interaction with human cell lines requires further investigation.

Purpose of the Study:

• To investigate the long-term effects of Kilham rat virus (KRV) inoculation on a human thymus-derived lymphocyte cell line (Molt-4).
• To determine the duration of infectious virus release and the presence of viral antigens in persistently infected cells.

Main Methods:

• Inoculation of Molt-4 cells with Kilham rat virus.
• Monitoring of cultures for infectious virus release over an extended period (up to seven months).
• Immunofluorescence assay to detect viral antigens within infected cells.

Main Results:

• Persistent infection was established in Molt-4 cell cultures following KRV inoculation.
• Infectious virus was continuously released from these cultures for up to seven months.
• A small but consistent percentage of infected cells exhibited rat virus antigens throughout the observation period.

Conclusions:

• Human lymphocyte cell lines can support persistent Kilham rat virus infections.
• Persistent KRV infection is characterized by prolonged infectious virus shedding and the sustained presence of viral antigens.
• These findings provide insights into the host-pathogen interactions of KRV in a human cellular context.