Related Experiment Video

Updated: Aug 21, 2026

A Convenient and General Expression Platform for the Production of Secreted Proteins from Human Cells
07:09

A Convenient and General Expression Platform for the Production of Secreted Proteins from Human Cells

Published on: July 31, 2012

Secretion mode and subcellular localization of human interferon-beta exogenously expressed in porcine renal

Teruko Nishio1, Masato Maruyama, Toyokazu Yoshida

  • 1Department of Biopharmaceutics and Drug Metabolism, Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Japan.

Biological & Pharmaceutical Bulletin
|October 7, 2004
PubMed

We have investigated the secretion polarity of human interferon-beta (HuIFN-beta) exogenously expressed in the porcine renal proximal tubule cell line, LLC-PK1. In these cells, stably expressed HuIFN-beta was secreted to the apical and basolateral sides. However, when transiently expressed by apical lipofection, HuIFN-beta was secreted to both cell sides, while basolateral-preferential secretion was seen for basal transfection. Confocal imaging using enhanced green fluorescent protein (EGFP)-tagged HuIFN-beta revealed no difference in the subcellular distribution in either of the chimeric protein-expressing cells examined. These results suggest that the secretion polarity of HuIFN-beta is regulated by a post trans-Golgi network in a cell type-dependent manner.

More Related Videos

Optimized Interferon-gamma ELISpot Assay to Measure T Cell Responses in the Guinea Pig Model after Vaccination08:13

Optimized Interferon-gamma ELISpot Assay to Measure T Cell Responses in the Guinea Pig Model after Vaccination

Published on: January 20, 2019

Detection of Intracellular Gene Expression in Live Cells of Murine, Human and Porcine Origin Using Fluorescence-labeled Nanoparticles08:14

Detection of Intracellular Gene Expression in Live Cells of Murine, Human and Porcine Origin Using Fluorescence-labeled Nanoparticles

Published on: November 13, 2015

Related Concept Videos

Inhibitors of Viral Protein Synthesis01:30

Inhibitors of Viral Protein Synthesis

Protein synthesis is indispensable for viral replication, as viruses lack the cellular machinery required for this process and must hijack the host's translational apparatus. In response, host cells deploy a critical innate immune defense involving interferons, specialized cytokines that play a central role in inhibiting viral propagation.Upon viral detection, infected cells release interferons that bind to receptors on adjacent uninfected cells, activating the JAK-STAT signaling pathway and...
Production of Pharmaceuticals01:30

Production of Pharmaceuticals

Industrial insulin production uses genetically engineered E. coli expressing a proinsulin gene controlled by a tryptophan promoter and containing a methionine linker for later cleavage. The cells also carry ampicillin resistance for selective growth. Seed cultures are stored at −80 °C and production begins by thawing a small amount to inoculate starter cultures, which are progressively scaled to a 50,000-L bioreactor. In the bioreactor, E. coli grow in nutrient-rich media under sterile, tightly...