Transferrin isoform distribution: gender and alcohol consumption

Area of Science:

• Biochemistry
• Clinical Chemistry
• Addiction Medicine

Background:

• Transferrin (Tf) exhibits various isoforms based on N-linked oligosaccharide sialylation.
• Carbohydrate-deficient transferrin (CDT), comprising asialo Tf, monosialo Tf, and disialo Tf, is a recognized marker for alcohol abuse detection.
• Potential sex-based differences in CDT isoform response to alcohol consumption remain underexplored.

Purpose of the Study:

• To investigate sex-specific differences in carbohydrate-deficient transferrin (CDT) isoforms in relation to alcohol consumption.
• To analyze the impact of varying alcohol consumption levels on asialo, monosialo, and disialo Tf levels in males and females.

Main Methods:

• Recruitment of 82 males and 43 females with documented drinking habits.
• Separation and quantification of Tf isoforms using Fast Protein Liquid Chromatography (FPLC) and Radioimmunoassay (RIA), including the CDTect RIA method.
• Expression of results as both relative and absolute values for comprehensive analysis.

Main Results:

• Alcohol consumption significantly elevated asialo Tf and disialo Tf levels, with a slight increase in monosialo Tf, in both genders.
• Females exhibited higher baseline levels of asialo Tf and monosialo Tf compared to males.
• No significant changes were observed in trisialo Tf or more sialylated Tf isoforms across different alcohol consumption groups.

Conclusions:

• Alcohol intake is strongly associated with increased asialo and disialo Tf levels, and moderately with monosialo Tf.
• Sex influences baseline CDT isoform levels, with women showing higher asialo and monosialo Tf.
• The diagnostic efficiency of CDT for alcohol abuse monitoring is consistent whether results are expressed as absolute or relative values.