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Solid tumors and enzyme activity in human lymphocytes.

R Giacchi1, M Sebastiani, F Canestrari

  • 1Divisione di Chirurgia Generale, Ospedali Riuniti, Pesaro.

The Italian Journal of Surgical Sciences
|January 1, 1987
PubMed
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This study found increased hexokinase (HK) enzyme activity in lymphocytes of cancer patients. This elevation correlates with tumor presence and stage, suggesting a potential link to cancer metabolism.

Area of Science:

  • Biochemistry
  • Oncology
  • Cell Metabolism

Background:

  • Glucose metabolism enzymes play a role in cellular energy production.
  • Altered enzyme activity is often observed in cancer cells.
  • Investigating lymphocyte enzyme activity may reveal systemic effects of solid tumors.

Purpose of the Study:

  • To investigate the enzyme activity of glucose metabolism in lymphocytes from patients with solid malignant tumors.
  • To determine if specific enzyme activity levels correlate with tumor presence or stage.

Main Methods:

  • Enzyme activity assays were performed on lymphocytes from patients with solid malignant tumors and healthy controls.
  • Activities of hexokinase (HK) and other glycolytic enzymes were measured.
  • Correlation analysis was conducted between enzyme activity and tumor stage.

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Main Results:

  • A significant 30% mean increase in hexokinase (HK) activity was observed in patients with solid malignant tumors compared to healthy subjects.
  • A positive correlation was found between the level of HK increase and the stage of the tumor.
  • No significant changes were observed in the activities of other examined enzymes, including phosphofructokinase (PFK), pyruvate-kinase (PK), and enolase.

Conclusions:

  • Increased hexokinase (HK) activity in lymphocytes is significantly associated with the presence of solid malignant tumors.
  • While not currently a definitive tumor marker, HK activity warrants further investigation as a potential indicator of cancer-induced biochemical changes.
  • The observed biochemical effect, originating away from the neoplastic tissue, merits further research into its underlying mechanisms.