Work

Incorporation of monoclonal antibodies into cells by osmotic permeabilization

Year: 1989

Type: article

Abstract: Incorporation of asparagine synthetase-specific monoclonal antibodies into L5178Y D10/R (L-asparaginase-resistant) murine lymphoma cells by osmotic lysis of pinocytic vesicles was used to evaluate the potential of the technique for macromolecular incorporation for metabolic studies. Nonspecific effects of the incorporation procedure included temporary inhibition of protein and DNA synthesis by 80-85% and a transitory loss of membrane integrity. Cells incorporated with an antibody inhibitory to tumor cell asparagine synthetase showed increased dependence upon an exogenous source of asparagine in the culture medium, while cells incorporated with a control antibody were not affected. These studies demonstrated that incorporation of inhibitory monoclonal antibodies into cells can be used to study the short term metabolic role of specific enzymes; however, the metabolic effects induced by the specific macromolecule must be evaluated within the context of the nonspecific effects caused by the osmotic treatment required for incorporation.

Source: Journal of Biological Chemistry

DOI: 10.1016/s0021-9258(18)83171-4

Authors: R Chakrabarti, N E Pfeiffer, D E Wylie, S M Schuster

Institution: University of Nebraska–Lincoln

Language: English

Topic: Amino Acid Enzymes and Metabolism

Subfield: Biochemistry

Field: Biochemistry, Genetics and Molecular Biology

Domain: Life Sciences

Open Access status: hybrid

Estimated APC paid: $3,430

Funder: National Cancer Institute