fulltext.study @t Gmail

Apoptosis induction is involved in UVA-induced autolysis in sea cucumber Stichopus japonicus

Paper ID Volume ID Publish Year Pages File Format Full-Text
29889 44445 2016 6 PDF Available
Title
Apoptosis induction is involved in UVA-induced autolysis in sea cucumber Stichopus japonicus
Abstract

•Free radical was produced in S. japonicus biological sample under UVA radiation.•Levels of p-p38 and p-JNK reached highest at 1 h UVA radiation.•Caspase-3 was activated and DNA was fragmentation after UVA radiation.•Protein degraded and cathepsin L was activated after UVA radiation.•Apoptosis induction is involved in UVA-induced autolysis of S. japonicus.

Autolysis easily happens to sea cucumber (Stichopus japonicus, S. japonicus) for external stimulus like UV exposure causing heavy economic losses. Therefore, it is meaningful to reveal the mechanism of S. japonicas autolysis. In the present study, to examine the involvement of apoptosis induction in UVA-induced autolysis of S. japonicas, we investigated the biochemical events including the DNA fragmentation, caspase-3 activation, mitogen-activated protein kinases (MAPKs) phosphorylation and free radical formation. Substantial morphological changes such as intestine vomiting and dermatolysis were observed in S. japonicus during the incubation after 1-h UVA irradiation (10 W/m2). The degradation of the structural proteins and enhancement of cathepsin L activity were also detected, suggesting the profound impact of proteolysis caused by the UVA irradiation even for 1 h. Furthermore, the DNA fragmentation and specific activity of caspase-3 was increased up to 12 h after UVA irradiation. The levels of phosphorylated p38 mitogen activated protein kinase (MAPK) and phosphorylated c-Jun.-N-terminal kinase (JNK) were significantly increased by the UVA irradiation for 1 h. An electron spin resonance (ESR) analysis revealed that UVA enhanced the free radical formation in S. japonicas, even through we could not identify the attributed species. These results suggest that UVA-induced autolysis in S. japonicas at least partially involves the oxidative stress-sensitive apoptosis induction pathway. These data present a novel insight into the mechanisms of sea cucumber autolysis induced by external stress.

Keywords
UVA, ultraviolet A; ROS, reactive oxygen species; MAPK, mitogen-activated protein kinases; JNK, cJun-N-terminal kinase; ERK, extracellular signal-regulated protein kinase; CL, cathepsin L; ESR, electron spin resonance; DMPO, dimethyl pyridine N-oxide; SDS
First Page Preview
Apoptosis induction is involved in UVA-induced autolysis in sea cucumber Stichopus japonicus
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us
Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology B: Biology - Volume 158, May 2016, Pages 130–135
Authors
, , , , , , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us