Snare protein expression and adenoviral transfection of amphicrine AR42J.
The amphicrine AR42J acinar cell line is an excellent model to study both exocrine and neuroendocrine exocytotic mechanisms. As a first step toward this goal, we determined the specific isoforms of the v- and t-SNARE and Munc18 families expressed in these cells. In addition, we show that dexamethasone-induced differentiation toward the exocrine phenotype causes an upregulation of several of these proteins. AR42J is notoriously difficult to transfect, limiting its usefulness as a model. However, we have now overcome this obstacle by acheiving high efficiency expression of a beta-galactosidase reporter gene and truncated SNAP-25 gene using adenoviral infection techniques. The AR42J cells can now be used to pursue and elucidate the distinct functions of individual SNARE isoforms used in endocrine and exocrine secretion within a single cell line.
Departments of Medicine, University of Toronto, Toronto, Ontario, Canada.
H Y
HY
Gaisano
X
X
Huang
L
L
Sheu
M
M
Ghai
C B
CB
Newgard
K Y
KY
Trinh
W S
WS
Trimble
D000256:Adenoviridae / Q000235:genetics; D000818:Animals; D001921:Brain / Q000166:cytology / Q000378:metabolism; D002454:Cell Differentiation / Q000187:drug effects; D002460:Cell Line; D002462:Cell Membrane / Q000378:metabolism; D003907:Dexamethasone / Q000494:pharmacology; D015870:Gene Expression / Q000187:drug effects; D017930:Genes, Reporter / Q000235:genetics; D007425:Intracellular Membranes / Q000378:metabolism; D008297:Male; D008565:Membrane Proteins / Q000235:genetics / Q000378:metabolism*; D051938:Munc18 Proteins; D009419:Nerve Tissue Proteins / Q000235:genetics / Q000378:metabolism; D010179:Pancreas / Q000166:cytology* / Q000187:drug effects / Q000378:metabolism; D020033:Protein Isoforms / Q000235:genetics / Q000378:metabolism; D050765:Qa-SNARE Proteins; D050683:R-SNARE Proteins; D051381:Rats; D017207:Rats, Sprague-Dawley; D050600:SNARE Proteins; D017384:Sequence Deletion; D050825:Synaptosomal-Associated Protein 25; D014162:Transfection; D033921:Vesicular Transport Proteins
D008565:Membrane Proteins; D051938:Munc18 Proteins; D009419:Nerve Tissue Proteins; D020033:Protein Isoforms; D050765:Qa-SNARE Proteins; D050683:R-SNARE Proteins; D050600:SNARE Proteins; C494210:Snap25 protein, rat; D050825:Synaptosomal-Associated Protein 25; D033921:Vesicular Transport Proteins; D003907:Dexamethasone