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Related Experiment Videos

Obese individuals as thiamin storers.

C Patrini1, A Griziotti, L Ricciardi

  • 1Department of Experimental Medicine, Section for Human Physiology, University of Pavia, Pavia, Italy. cpatrini@unipv.it

International Journal of Obesity and Related Metabolic Disorders : Journal of the International Association for the Study of Obesity
|April 21, 2004
PubMed
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Obese women show lower plasma thiamin levels but may compensate by storing more thiamin intracellularly. This suggests a complex thiamin status in obesity, impacting cellular thiamin recycling.

Area of Science:

  • Biochemistry
  • Nutritional Science
  • Human Physiology

Background:

  • Obesity is a complex metabolic condition associated with various nutritional deficiencies and altered metabolic pathways.
  • Thiamin (vitamin B1) is essential for carbohydrate metabolism and cellular energy production.
  • Understanding thiamin status in obese individuals is crucial for metabolic health assessment.

Purpose of the Study:

  • To comprehensively assess thiamin status in obese women by measuring thiamin and its phosphoesters in plasma and erythrocytes.
  • To compare thiamin levels and metabolic indicators between obese and normal-weight women.

Main Methods:

  • A comparative study design was employed, involving 10 obese and 10 normal-weight women of fertile age.
  • High-performance liquid chromatography (HPLC) was utilized to quantify thiamin and its phosphorylated forms in plasma and erythrocytes.

Related Experiment Videos

  • Key ratios, including plasma thiamin/thiamin monophosphate and plasma thiamin monophosphate/erythrocytes thiamin pyrophosphate, were analyzed as indicators of thiamin status.

    • Main Results:

    • Obese women exhibited significantly lower plasma concentrations of thiamin, thiamin monophosphate, and total thiamin compared to normal-weight controls.
    • A significant reduction in thiamin pyrophosphate ester and total thiamin content was observed in the erythrocytes of obese women.
    • Obese women showed an altered plasma thiamin/thiamin monophosphate ratio and a decreased plasma thiamin monophosphate/erythrocytes thiamin pyrophosphate ratio.

    Conclusions:

    • The findings suggest that obese women may maintain adequate intracellular thiamin levels through enhanced cellular storage and recycling mechanisms.
    • Despite lower plasma levels, intracellular thiamin homeostasis might be preserved in obesity via preferential thiamin recycling.
    • This compensatory mechanism could explain how obese individuals maintain cellular thiamin status despite reduced circulating levels.