Diffusion Loading Conditions Determine Recovery of Protein Synthesis in Electroporated P3X63Ag8 Cells

Overview

Journal Experientia

Specialty Science

Date 1988 Mar 15

PMID 2450774

Citations 10

Authors

M R Michel

M Elgizoli

H KOBLET

C Kempf

Affiliations

Soon will be listed here.

Abstract

Using the suspension cell line P3X63Ag8 we have studied the impact of the composition of the diffusion medium on cellular protein synthesis under standard electroporation conditions in TBS-Na. This buffer contains the high saline concentration usually present in electroporation-mediated DNA transfection. Electroporation in the presence of TBS-Na resulted in an immediate shut-off of protein synthesis, even though both FITC-dextran (Mr 40 kD) and Semliki Forest virus core protein (Mr 33 kD) were incorporated efficiently into the cytoplasm across the electropores at 0 degrees C. Subsequent resealing of the pores was completed after a 5-min incubation at 37 degrees C. When compared with control cells, overall protein synthesis of electroporated cells recovered slowly to resume a 30% activity after 1 h of incubation at 37 degrees C. We have determined optimal conditions for diffusion loading (which necessitates the presence of ATP, GTP, amino acids, K+, Mg2+, and Ca2+) and resealing (in the presence of K+, Mg2+, and Ca2+), leading to a full and lasting recovery of protein synthesis within 5 min after pore closure.

Citing Articles

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