Retinoic acid and interferon in human cancer: mechanistic and clinical studies

D M Moore1, D V Kalvakolanu, S M Lippman

  • 1University of Texas M.D. Anderson Cancer Center, Houston 77030.

Seminars in Hematology
|October 1, 1994
PubMed

Insights

Combining retinoids like retinoic acid (RA) with interferons (IFNs) shows synergistic antitumor effects. This combination enhances gene expression and shows promise against advanced skin and cervical cancers, potentially with radiotherapy.

Area of Science:

  • Oncology
  • Molecular Biology
  • Pharmacology

Background:

  • Retinoids and interferons (IFNs) exhibit antitumor properties individually.
  • Synergistic effects observed with combined retinoid-interferon (RA-IFN) therapy in preclinical models.
  • RA enhances IFN action and gene expression in various cell systems.

Purpose of the Study:

  • To investigate the synergistic antiproliferative, differentiating, and antiangiogenic activities of combined retinoids and IFNs.
  • To explore the potential of RA-IFN combinations in treating human hematologic and solid tumors.
  • To evaluate clinical outcomes of combined 13-cis-retinoic acid (13cRA) and IFN therapy.

Main Methods:

  • Combination therapy studies in human hematologic and solid tumor cell lines.
  • Analysis of gene expression, particularly IFN-stimulated genes.
  • Clinical trials evaluating 13cRA and IFN in advanced squamous cell carcinoma (SCC).

Main Results:

  • Combined RA-IFN therapy demonstrated synergistic antiproliferative, differentiating, and antiangiogenic effects.
  • RA-IFN treatment induced higher levels of IFN-stimulated genes compared to individual agents.
  • Clinical trials showed substantial activity of 13cRA-IFN against advanced SCC of the skin and cervix.

Conclusions:

  • Combined retinoid and interferon therapy offers synergistic antitumor activity.
  • The RA-IFN regimen shows significant clinical promise for advanced SCC, particularly when integrated with radiotherapy.
  • Further research is required to elucidate the precise mechanistic interactions between RA and IFN.

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