A recovered avian myelocytomatosis virus that induces lymphomas in chickens: pathogenic properties and their

Cell
|December 1, 1983
PubMed

Insights

Avian myelocytomatosis virus MC29, typically causing myeloid and other tumors, was found to induce lymphoid tumors in chickens. This novel finding is linked to a hybrid myc gene in the recovered HBI virus.

Area of Science:

  • Oncology
  • Virology
  • Molecular Biology

Background:

  • Avian myelocytomatosis virus MC29 (MC29) normally induces myelocytomas and kidney/liver tumors via its v-myc gene.
  • Lymphoid tumors in chickens are typically associated with c-myc gene activation by lymphoid leukosis virus integration.

Purpose of the Study:

  • To investigate the oncogenic potential of a recovered MC29 virus (HBI) with a hybrid myc gene.
  • To determine if HBI can induce lymphoid tumors and elucidate the underlying molecular mechanisms.

Main Methods:

  • Analysis of a recombinant MC29 virus (HBI) containing both c-myc and v-myc sequences.
  • Inoculation of HBI into chickens to observe tumor development.
  • Molecular analysis of tumors, including proviral DNA integration and protein expression.

Main Results:

  • HBI inoculation induced lymphoid tumors in chickens, independent of the bursa.
  • Tumors comprised both T and B lymphocytes.
  • HBI proviral DNA was detected in most tumors, and the HBI gag-myc fusion protein (p108) was present in tumor cells.

Conclusions:

  • The hybrid myc gene in HBI can induce lymphoid tumors, expanding the known disease spectrum of MC29.
  • These findings offer insights into the target-cell specificity of myc-driven oncogenesis.

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