scholarly journals Na+ channel inactivation: a comparative study between pancreatic islet  -cells and adrenal chromaffin cells in rat

2003 ◽  
Vol 548 (1) ◽  
pp. 191-202 ◽  
Author(s):  
X.-L. Lou ◽  
X. Yu ◽  
X.-K. Chen ◽  
K.-L. Duan ◽  
L.-M. He ◽  
...  
1997 ◽  
Vol 73 ◽  
pp. 157
Author(s):  
Toshihiko Yanagita ◽  
Hideyuki Kobayashi ◽  
Keizou Masumoto ◽  
Ryuichi Yamamoto ◽  
Tomoaki Yuhi ◽  
...  

1985 ◽  
Vol 33 (8) ◽  
pp. 791-798 ◽  
Author(s):  
J A Nolan ◽  
J Q Trojanowski ◽  
R Hogue-Angeletti

Gel-eluted bovine chromogranin (CG), the 75,000 dalton acidic protein abundantly present in adrenal chromaffin granules, was used as immunogen to prepare anti-CG serum. The specificity of the antiserum was demonstrated in immunoblots of electrophoresed bovine CG and in immunohistochemical studies of bovine adrenal medulla. In the immunoblots, the predominant immunoreactive band had a molecular weight of 75,000 daltons. Bands with a higher or lower molecular weight were also immunoreactive and may represent CG precursors or breakdown products. In the adrenal gland, only adrenal chromaffin cells contained CG immunoreactivity. Immunoblots and immunohistochemistry were also used to characterize the distribution of CG in bovine tissues. CG was expressed by cells of the diffuse neuroendocrine system (DNS) including: adrenal chromaffin cells, enterochromaffin cells, pancreatic islet cells, cells of the adenohypophysis, thyroid C cells, parathyroid cells, and submandibular gland. CG was also seen in four locations not previously recognized to express this antigen: thymic epithelial cells, neurons, the inner segment of rods and cones, and the submandibular gland. We demonstrate a wider distribution of CG than previously recognized and that the molecule detected in tissue by immunohistochemistry is indeed CG. We conclude that CG is expressed by neurons, cells of the DNS, and by a few other cells that may or may not be related to the DNS. The antiserum described here should prove valuable in developing an understanding of the function(s) of CG.


Author(s):  
Joe A. Mascorro ◽  
Robert D. Yates

Extra-adrenal chromaffin organs (abdominal paraganglia) constitute rich sources of catecholamines. It is believed that these bodies contain norepinephrine exclusively. However, the present workers recently observed epinephrine type granules in para- ganglion cells. This report investigates catecholamine containing granules in rabbit paraganglia at the ultrastructural level.New Zealand white rabbits (150-170 grams) were anesthetized with 50 mg/kg Nembutal (IP) and perfused with 3% glutaraldehyde buffered with 0.2M sodium phosphate, pH 7.3. The retroperitoneal tissue blocks were removed and placed in perfusion fluid for 4 hours. The abdominal paraganglia were dissected from the blocks, diced, washed in phosphate buffer and fixed in 1% osmic acid buffered with phosphate. In other animals, the glutaraldehyde perfused tissue blocks were immersed for 1 hour in 3% glutaraldehyde/2.5% potassium iodate buffered as before. The paraganglia were then diced, separated into two vials and washed in the buffer. A portion of this tissue received osmic acid fixation.


Diabetes ◽  
1980 ◽  
Vol 29 (6) ◽  
pp. 497-500 ◽  
Author(s):  
P. Meda ◽  
E. L. Hooghe-Peters ◽  
L. Orci

Diabetes ◽  
1988 ◽  
Vol 37 (8) ◽  
pp. 1123-1128
Author(s):  
N. Welsh ◽  
A. Hallberg ◽  
S. Sandler ◽  
C. Hellerstrom

Diabetes ◽  
1982 ◽  
Vol 31 (3) ◽  
pp. 189-193 ◽  
Author(s):  
Y. Spiess ◽  
M. A. Smith ◽  
W. Vale

Diabetes ◽  
1996 ◽  
Vol 45 (9) ◽  
pp. 1197-1203 ◽  
Author(s):  
J. Saldeen ◽  
D. T. Curiel ◽  
D. L. Eizirik ◽  
A. Andersson ◽  
E. Strandell ◽  
...  

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