PMID: 8972636Dec 1, 1996Paper

Heat shock transcription factor, HSF, is activated by ultraviolet irradiation

Photochemistry and Photobiology
K OhnishiT Ohnishi

Abstract

We demonstrated previously that human glioblastoma cell lines accumulated heat shock protein (hsp)72, not only after heat shock, but also after, gamma-ray or UV irradiation. In the present study, we investigated whether the binding activity of heat shock transcription factor (HSF) to the heat shock element (HSE) of the hsp72 gene promoter increased after UV irradiation of human glioblastoma A-172 cells. A gel mobility-shift assay showed that the activated HSF level increased markedly after UV irradiation. Furthermore, UV irradiation of nuclear extracts in vitro did not activate HSF, whereas in vitro heat shock treatment did. These results suggest that HSF activation can be induced by UV irradiation at normal physiological temperature and hsp72 accumulation results from an increased activated HSF level, i.e. a transcriptional up-regulation of hsp72. In addition, the mechanism responsible for UV-induced HSF activation may differ from the process that operates in heat-treated cells.

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.