A High Yield and Cost-efficient Expression System of Human Granzymes in Mammalian Cells

作者： Farokh Dotiwala1, Isabelle Fellay2, Luis Filgueira2, Denis Martinvalet3, Judy Lieberman1, Michael Walch2 1Cellular and Molecular Medicine Program,Boston Children’s Hospital and Harvard Medical School, 2Department of Medicine,University of Fribourg, 3Centre Médical Universitaire,University of Geneva

简介：

Overview

This article describes a cost-efficient granzyme expression system utilizing HEK293T cells. The method yields high amounts of pure, fully glycosylated, and enzymatically active proteases.

Key Study Components

Area of Science

• Cell Biology
• Protein Expression
• Enzyme Purification

Background

• Granzymes are serine proteases important for immune response.
• HEK293T cells are commonly used for protein production.
• Efficient expression systems are crucial for research and therapeutic applications.
• Previous methods may be costly or yield low amounts of active enzymes.

Purpose of Study

• To develop a cost-effective method for producing granzymes.
• To ensure the enzymes are fully glycosylated and active.
• To optimize the yield of granzyme production in HEK293T cells.

Methods Used

• Expansion of HEK293T cells in tissue culture dishes.
• Transient transfection with a granzyme expression plasmid using calcium phosphate.
• Harvesting cell supernatant for granzyme purification.
• Purification via immobilized metal affinity chromatography and cation exchange chromatography.

Main Results

• High yields of granzyme were achieved from the HEK293T cells.
• The purified enzymes were found to be fully glycosylated.
• Enzymatic activity was confirmed post-purification.
• The method proved to be cost-efficient compared to traditional approaches.

Conclusions

• The developed expression system is effective for granzyme production.
• This method can facilitate further research on granzymes.
• It offers a scalable solution for producing active proteases.

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