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Subcellular distribution of spermidine/spermine N(1)-acetyltransferase

Holst, Martina LU ; Nevsten, Pernilla LU ; Johansson, Fredrik I LU ; Carlemalm, Eric LU and Oredsson, Stina LU (2008) In Cell Biology International 32(1). p.39-47
Abstract
The subcellular distribution of the polyamine catabolic enzyme spermidine/spermine N(1)-acetyltransferase (SSAT) was studied in L56Br-C1 cells treated with 10muM N(1),N(11)-diethylnorspermine (DENSPM) for 24h. Cells were fractioned into three subcellular fractions. A particulate fraction containing the mitochondria was denoted as the mitochondrial fraction. After DENSPM treatment, an increase in SSAT activity was mainly found in the mitochondrial fraction. Western blot analysis showed an increased level of the SSAT protein in the mitochondrial fraction compared to the cytosolic fraction. Immunofluorescence microscopy and immunogold labeling transmission electron microscopy also showed a mitochondrial association of SSAT. Transmission... (More)
The subcellular distribution of the polyamine catabolic enzyme spermidine/spermine N(1)-acetyltransferase (SSAT) was studied in L56Br-C1 cells treated with 10muM N(1),N(11)-diethylnorspermine (DENSPM) for 24h. Cells were fractioned into three subcellular fractions. A particulate fraction containing the mitochondria was denoted as the mitochondrial fraction. After DENSPM treatment, an increase in SSAT activity was mainly found in the mitochondrial fraction. Western blot analysis showed an increased level of the SSAT protein in the mitochondrial fraction compared to the cytosolic fraction. Immunofluorescence microscopy and immunogold labeling transmission electron microscopy also showed a mitochondrial association of SSAT. Transmission electron microscopy revealed that the endoplasmic reticulum was devoid of ribosomes in DENSPM-treated cells, in contrast to control cells that contained ample ribosomes. An increased SSAT activity in connection with the mitochondria may be part of the mechanism of DENSPM-induced apoptosis. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Cell Biology International
volume
32
issue
1
pages
39 - 47
publisher
Elsevier
external identifiers
  • wos:000260586200006
  • scopus:39049117302
ISSN
1095-8355
DOI
10.1016/j.cellbi.2007.08.008
language
English
LU publication?
yes
id
e4fcea11-d331-4fa7-831d-262e900a72ad (old id 760435)
date added to LUP
2007-12-17 12:52:27
date last changed
2017-01-01 05:17:35
@article{e4fcea11-d331-4fa7-831d-262e900a72ad,
  abstract     = {The subcellular distribution of the polyamine catabolic enzyme spermidine/spermine N(1)-acetyltransferase (SSAT) was studied in L56Br-C1 cells treated with 10muM N(1),N(11)-diethylnorspermine (DENSPM) for 24h. Cells were fractioned into three subcellular fractions. A particulate fraction containing the mitochondria was denoted as the mitochondrial fraction. After DENSPM treatment, an increase in SSAT activity was mainly found in the mitochondrial fraction. Western blot analysis showed an increased level of the SSAT protein in the mitochondrial fraction compared to the cytosolic fraction. Immunofluorescence microscopy and immunogold labeling transmission electron microscopy also showed a mitochondrial association of SSAT. Transmission electron microscopy revealed that the endoplasmic reticulum was devoid of ribosomes in DENSPM-treated cells, in contrast to control cells that contained ample ribosomes. An increased SSAT activity in connection with the mitochondria may be part of the mechanism of DENSPM-induced apoptosis.},
  author       = {Holst, Martina and Nevsten, Pernilla and Johansson, Fredrik I and Carlemalm, Eric and Oredsson, Stina},
  issn         = {1095-8355},
  language     = {eng},
  number       = {1},
  pages        = {39--47},
  publisher    = {Elsevier},
  series       = {Cell Biology International},
  title        = {Subcellular distribution of spermidine/spermine N(1)-acetyltransferase},
  url          = {http://dx.doi.org/10.1016/j.cellbi.2007.08.008},
  volume       = {32},
  year         = {2008},
}