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Related Experiment Videos

Friend virus replication as a function of age.

B Cinader1, H C van der Gaag, S Y Koh

  • 1Department of Anatomy, University of Toronto, Canada.

Mechanisms of Ageing and Development
|September 30, 1987
PubMed
Summary

Aging significantly impacts Friend spleen focus-forming virus (SFFV) replication in mice. This study reveals age-dependent changes in virus recovery, suggesting SFFV can indicate aging processes.

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Area of Science:

  • Virology
  • Immunology
  • Gerontology

Background:

  • Friend spleen focus-forming virus (SFFV) is a retrovirus known to infect mice.
  • Age-related changes in immune function can influence viral replication and pathogenesis.

Purpose of the Study:

  • To investigate the effect of host age on the replication of Friend spleen focus-forming virus (SFFV) in different mouse strains.
  • To determine if SFFV replication can serve as a biomarker for aging processes.

Main Methods:

  • Four strains of mice (C57BL/6, C3H/He, SJL, and A) were infected with NB-tropic Friend virus (FV) complex at various ages (6-134 weeks).
  • Spleen tissues were analyzed for SFFV recovery.
  • Irradiated C57BL/6 mice were reconstituted with syngeneic marrow cells and infected with FV to assess recipient age effects.

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Main Results:

  • SFFV replication showed significant age-dependent increases in C57BL/6 mice after 40 weeks of age.
  • In C3H/He mice, older individuals showed a 6-fold greater SFFV recovery compared to younger adults.
  • SJL mice exhibited biphasic age-related SFFV recovery, while A strain mice showed no consistent age-related changes.
  • In C57BL/6 mice, recipient age influenced SFFV recovery following marrow reconstitution and FV infection.

Conclusions:

  • Friend SFFV replication is sensitive to host age in mice, varying across different genetic backgrounds.
  • Age-dependent changes in SFFV replication suggest its potential utility as an indicator for studying aging processes.
  • The underlying mechanisms governing age-related regulation of SFFV replication and observed polymorphisms require further investigation.