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Isolation and Characterization of a Head and Neck Squamous Cell Carcinoma Subpopulation Having Stem Cell Characteristics
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Hemoxygenase-1 Promotes Head and Neck Cancer Cell Viability.

Marilina Mascaró1, Exequiel G Alonso1, Karen Schweitzer1

  • 1Laboratorio de Biología del Cáncer, Instituto de Investigaciones Bioquímicas de Bahía Blanca (INIBIBB), Universidad Nacional del Sur (UNS)-CONICET, Dpto. de Biología, Bioquímica y Farmacia (UNS), Bahía Blanca 8000, Argentina.

Antioxidants (Basel, Switzerland)
|October 27, 2022
PubMed
Summary
This summary is machine-generated.

Heme oxygenase-1 (HO-1) promotes head and neck squamous cell carcinoma (HNSCC) progression. Nuclear localization of HO-1, particularly truncated forms, enhances tumor cell viability and proliferation, impacting patient survival.

Keywords:
cancerhead and neckhemoxygenase-1nucleus

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Area of Science:

  • Oncology
  • Molecular Biology
  • Biochemistry

Background:

  • Head and neck squamous cell carcinoma (HNSCC) has a high mortality rate, necessitating novel therapeutic strategies.
  • Heme oxygenase-1 (HO-1) is upregulated in HNSCC and its nuclear localization correlates with malignant progression.

Purpose of the Study:

  • To elucidate the mechanisms by which HO-1 contributes to HNSCC progression.
  • To investigate the role of HO-1 localization and enzymatic activity in HNSCC.

Main Methods:

  • Pharmacological and genetic approaches were used to study HO-1 function in HNSCC.
  • In vitro experiments assessed cell viability, cell cycle progression, and migration capacity.
  • Analysis of HO-1 mRNA levels and patient survival data.

Main Results:

  • High HO-1 mRNA levels correlated with decreased survival in early-stage HNSCC.
  • Full-length HO-1 in the cytoplasm increased cell viability and promoted cell cycle progression.
  • C-terminal truncated HO-1 in the nucleus also increased cell viability and promoted cell cycle progression, without affecting migration.

Conclusions:

  • HO-1 exhibits protumor activities in HNSCC.
  • Nuclear localization of HO-1 is a key factor in its protumorigenic effects in HNSCC.