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Lysosomal exocytosis and caspase-8-mediated apoptosis in UVA-irradiated keratinocytes

Overview of attention for article published in Journal of Cell Science, January 2013
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Title
Lysosomal exocytosis and caspase-8-mediated apoptosis in UVA-irradiated keratinocytes
Published in
Journal of Cell Science, January 2013
DOI 10.1242/jcs.130633
Pubmed ID
Authors

Hanna Appelqvist, Petra Wäster, Ida Eriksson, Inger Rosdahl, Karin Öllinger

Abstract

Ultraviolet (UV) irradiation is a major environmental carcinogen involved in the development of skin cancer. To elucidate the initial signaling during UV-induced damage in human keratinocytes, we investigated lysosomal exocytosis and apoptosis induction. UVA, but not UVB, induced plasma membrane damage, which was repaired by Ca(2+)-dependent lysosomal exocytosis. The lysosomal exocytosis resulted in extracellular release of cathepsin D and acid sphingomyelinase (aSMase). Two hours after UVA irradiation, we detected activation of caspase-8, which was reduced by addition of anti-aSMAse. Furthermore, caspase-8 activation and apoptosis was reduced by prevention of endocytosis and by the use of cathepsin inhibitors. We conclude that lysosomal exocytosis is part of the keratinocyte response to UVA and is followed by cathepsin-dependent activation of caspase-8. The findings have implications for the understanding of UV-induced skin damage and emphasize that UVA and UVB initiate apoptosis through different signaling pathways in keratinocytes.

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The data shown below were collected from the profile of 1 X user who shared this research output. Click here to find out more about how the information was compiled.
Mendeley readers

Mendeley readers

The data shown below were compiled from readership statistics for 36 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
France 1 3%
Unknown 35 97%

Demographic breakdown

Readers by professional status Count As %
Researcher 7 19%
Student > Bachelor 7 19%
Student > Ph. D. Student 6 17%
Student > Doctoral Student 4 11%
Professor 3 8%
Other 8 22%
Unknown 1 3%
Readers by discipline Count As %
Biochemistry, Genetics and Molecular Biology 13 36%
Agricultural and Biological Sciences 11 31%
Medicine and Dentistry 5 14%
Immunology and Microbiology 2 6%
Neuroscience 1 3%
Other 0 0%
Unknown 4 11%
Attention Score in Context

Attention Score in Context

This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 24 December 2013.
All research outputs
#19,944,994
of 25,374,647 outputs
Outputs from Journal of Cell Science
#7,805
of 9,020 outputs
Outputs of similar age
#221,308
of 289,004 outputs
Outputs of similar age from Journal of Cell Science
#157
of 244 outputs
Altmetric has tracked 25,374,647 research outputs across all sources so far. This one is in the 18th percentile – i.e., 18% of other outputs scored the same or lower than it.
So far Altmetric has tracked 9,020 research outputs from this source. They typically receive a little more attention than average, with a mean Attention Score of 6.2. This one is in the 9th percentile – i.e., 9% of its peers scored the same or lower than it.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 289,004 tracked outputs that were published within six weeks on either side of this one in any source. This one is in the 20th percentile – i.e., 20% of its contemporaries scored the same or lower than it.
We're also able to compare this research output to 244 others from the same source and published within six weeks on either side of this one. This one is in the 27th percentile – i.e., 27% of its contemporaries scored the same or lower than it.