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Removing a Cystein Group On Interferon Alpha 2b at Position 2 and 99 does Not Diminish Antitumor Activity of the

Heni Rachmawati1, Adhitya Jessica1, Yeyet Cahyati Sumirtaputra1

  • 1School of Pharmacy, Bandung Institute of Technology, Ganesha 10, 40132, Bandung, Indonesia.

Scientia Pharmaceutica
|April 26, 2016
PubMed

Insights

A modified interferon alpha 2b (IFNα2b) shows enhanced antitumor effects by promoting apoptosis in cancer cells. This mutein form of recombinant human IFNα2b (rhIFNα2b) warrants further investigation for cancer therapy.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Immunology

Background:

  • Interferon alpha 2b (IFNα2b) is a standard therapeutic protein for hepatitis infections.
  • IFNα2b exhibits antitumor activity through antiproliferation and proapoptotic effects.
  • Recombinant human IFNα2b (rhIFNα2b) and its mutein forms have been developed for improved characteristics.

Purpose of the Study:

  • To evaluate the in vitro antitumor effect of a mutein rhIFNα2b compared to the native form and commercial rIFNα2b.
  • To investigate the underlying mechanisms of action, including effects on cell cycle and gene/protein expression.
  • To assess the proapoptotic activity of the mutein rhIFNα2b.

Main Methods:

  • HepG2 cells were treated with native and mutein rhIFNα2b.
  • MTT assay and cell viability tests were performed.
  • Cell cycle analysis via flow cytometry, and pSTAT1 and caspase 3 expression were analyzed.

Main Results:

  • No significant differences were observed in MTT assays or cell viability between the native and mutein forms.
  • Mutein rhIFNα2b demonstrated a trend towards enhanced proapoptotic activity.
  • Flow cytometry, pSTAT1, and caspase 3 expression supported the increased proapoptotic effect of the mutein form.

Conclusions:

  • The mutein rhIFNα2b exhibits comparable antiproliferative effects to the native form but shows improved proapoptotic activity.
  • The findings suggest that mutein rhIFNα2b may be a promising candidate for cancer therapy.
  • Further research into the molecular mechanisms of mutein rhIFNα2b is warranted.
Keywords:
AntiproliferationApoptosisCaspase 3Flow cytometriInterferon alpha 2bMuteinp21k1p27pSTAT1

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