Cell adhesion mediated by a purified fucosyltransferase

Area of Science:

• Biochemistry
• Cell Biology
• Glycobiology

Background:

• Cell adhesion is crucial for tissue development and function.
• Glycosyltransferases are enzymes that synthesize complex carbohydrates.
• The role of glycosyltransferases in direct cell adhesion is not well understood.

Purpose of the Study:

• To investigate the role of fucosyltransferase in human embryonic skin fibroblast adhesion.
• To determine the mechanism of adhesion mediated by fucosyltransferase.
• To compare fucosyltransferase-mediated adhesion with other surface proteins.

Main Methods:

• Immobilization of purified fucosyltransferase on surfaces.
• Assessing fibroblast attachment and spreading on functionalized surfaces.
• Testing inhibition of adhesion using specific carbohydrate acceptors.
• Evaluating the effect of enzyme denaturation on adhesion.

Main Results:

• Human embryonic skin fibroblasts showed significant attachment and spreading on fucosyltransferase surfaces.
• Other proteins like bovine serum albumin did not enhance adhesion.
• Adhesion was inhibited by specific carbohydrate structures (galactosyl-(beta 1 leads to 4)-N-acetylglucosamine).
• Enzyme activity was essential, as denaturation abolished adhesion-enhancing effects.

Conclusions:

• Fucosyltransferase can directly mediate and enhance cell adhesion.
• The adhesion mechanism involves specific interactions between the enzyme and cell surface carbohydrate acceptors.
• Glycosyltransferases may function analogously to lectins in stimulating cell adhesion.