Development of an intravenous glutamine supply through dipeptide technology

Area of Science:

• Biochemistry
• Nutritional Science
• Pharmaceutical Chemistry

Background:

• Glutamine is a semi-essential amino acid crucial during catabolic stress.
• Instability of free glutamine in aqueous solutions prevents its use in heat-sterilized infusion solutions.
• Existing limitations hinder optimal glutamine delivery in parenteral nutrition.

Purpose of the Study:

• To introduce glycyl-L-glutamine as a stable glutamine derivative for parenteral nutrition.
• To evaluate the properties and utilization of glycyl-L-glutamine in infusion solutions.
• To present Glamin, a novel amino acid solution containing glycyl-L-glutamine.

Main Methods:

• Chemical synthesis of glycyl-L-glutamine.
• Assessment of solubility and stability during heat sterilization.
• Evaluation of enzymatic hydrolysis and utilization post-infusion.
• Chromatographic methods for purity control.
• Formulation of Glamin, a complete amino acid solution.

Main Results:

• Glycyl-L-glutamine is water-soluble and stable during heat sterilization.
• The dipeptide undergoes rapid enzymatic hydrolysis, ensuring efficient utilization.
• Chemical synthesis allows for large-scale production with controlled purity.
• Glamin contains 20 g/L of glutamine as glycyl-L-glutamine without added free glycine.
• The formulation avoids imbalances from free amino acids.

Conclusions:

• Glycyl-L-glutamine is a suitable and stable glutamine source for parenteral nutrition.
• This dipeptide overcomes the limitations of free glutamine in infusion therapies.
• Glamin provides an effective means of delivering glutamine in a stable, well-utilized form.