Immunological demonstration of multiple esterases in human eccrine sweat

Area of Science:

• Biochemistry
• Human Physiology
• Enzymology

Background:

• Eccrine sweat is a complex biological fluid secreted by human skin.
• Understanding the enzymatic composition of sweat is crucial for various physiological and diagnostic applications.

Purpose of the Study:

• To identify and characterize the esterase enzymes present in human eccrine sweat.
• To investigate the presence of lipase activity in eccrine sweat.

Main Methods:

• Electrophoretic analysis was used to separate and identify esterase isoenzymes in sweat.
• Immunological methods were employed to compare sweat esterases with known proteins.

Main Results:

• At least five different esterases were detected in human eccrine sweat.
• One identified esterase exhibited cholinesterase activity.
• A non-specific carboxylesterase, immunologically identical to a serum protein, was found.
• Two distinct human isoenzymes with gamma-globulin mobility were identified, also matching a non-specific carboxylesterase.
• No significant lipase activity was detected in the analyzed sweat samples.

Conclusions:

• Human eccrine sweat possesses a diverse array of esterase enzymes.
• The identified esterases, including cholinesterase and specific carboxylesterase isoenzymes, contribute to the biochemical profile of sweat.
• The absence of lipase activity suggests specific enzymatic functions within eccrine secretions.