Inhibition of chemotactic peptide-induced development of cell polarity and locomotion by the protein kinase C inhibitor CGP 41 251 in human neutrophils correlates with inhibition of protein phosphorylation

Experimental Cell Research
Verena Niggli, H Keller

Abstract

Several protein kinase inhibitors of the staurosporine type displaying different enzyme specificity were used to study the role of protein kinase C (PKC) in motile neutrophil functions. Effects on protein phosphorylation, F-actin localization, morphology, and locomotion were determined. Only staurosporine, but not another inhibitor more specific for PKC (CGP 41 251) or inhibitors of cyclic nucleotide-dependent kinases (KT 5720, KT 5822), induced formation of F-actin-enriched surface protrusions at nanomolar concentrations in initially spherical neutrophils. The inhibitor with the highest specificity for PKC, CGP 41 251, had no effect on morphology and F-actin localization of resting cells up to 1 microM. However, this inhibitor suppressed front-tail polarity and locomotion in chemotactic peptide-stimulated cells. The cells became nonpolar with surface projections instead. Inhibition of front-tail polarity induced by CGP 41 251 strongly correlated with inhibition of in situ phosphorylation of a 67-kDa protein (IC50 = 0.2 microM), whereas induction of polarity by chemotactic peptide was associated with increased phosphorylation of this protein. Kinase inhibitors inactive on PKC (KT 5720, KT 5822) did not affect development of fro...Continue Reading

Citations

Jul 4, 2009·American Journal of Respiratory Cell and Molecular Biology·Rachael E EckertSamuel L Jones
Jun 19, 2001·American Journal of Physiology. Heart and Circulatory Physiology·H ItohK C Kent
Apr 16, 2002·The International Journal of Biochemistry & Cell Biology·Anna Barbara HauertVerena Niggli
Sep 10, 2003·The International Journal of Biochemistry & Cell Biology·Verena Niggli

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.