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Treatment of aggressive thyroid cancer with an oncolytic herpes virus

Zhenkun Yu1, David P Eisenberg, Bhuvanesh Singh

  • 1Department of Surgery, Memorial Sloan-Kettering Cancer Center, New York, NY, USA.

International Journal of Cancer
|September 24, 2004
PubMed

Insights

Oncolytic herpes simplex virus (HSV) therapy shows promise for aggressive thyroid cancers. NV1023 effectively reduced or eliminated various thyroid cancer cell lines and tumors in mice, suggesting potential for treating anaplastic thyroid carcinomas.

Area of Science:

  • Oncology
  • Virology
  • Cancer Therapeutics

Background:

  • Many thyroid cancers have a good prognosis, but aggressive subtypes like anaplastic thyroid carcinomas are often fatal.
  • Current treatments offer limited survival benefits for advanced thyroid cancers.
  • Oncolytic herpes simplex viruses (HSVs) demonstrate potent antitumor activity against various cancers.

Purpose of the Study:

  • To evaluate the efficacy of an oncolytic HSV (NV1023) against diverse thyroid cancer cell lines.
  • To assess the in vivo antitumor activity of NV1023 in mouse models of thyroid cancer.

Main Methods:

  • NV1023 was tested against 7 human thyroid cancer cell lines (papillary, follicular, medullary, anaplastic) in vitro.
  • Infection, cell lysis, and viral replication were quantified.
  • NV1023 was administered to athymic nude mice bearing flank tumors of various thyroid cancer types.

Main Results:

  • NV1023 effectively infected and lysed most thyroid cancer cell lines, with resistance observed only in one follicular line.
  • In vitro assays showed significant cell death and logarithmic viral replication in susceptible cell lines.
  • In vivo studies demonstrated complete tumor regression in papillary thyroid cancer and significant tumor reduction in anaplastic and medullary thyroid cancer models following NV1023 treatment.

Conclusions:

  • Oncolytic herpes simplex virus therapy exhibits significant potential against aggressive thyroid carcinomas, including anaplastic types.
  • NV1023 demonstrated broad activity across different thyroid cancer histologies in vitro and in vivo.
  • These findings support further investigation of herpes oncolytic therapy for treating advanced thyroid cancers.

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