Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - A distinct 2,5-di-(tert-butyl)-1,4-benzohydroquinone-sensitive calcium store in bovine adrenal chromaffin cells
AU - Robinson, Iain M.
AU - Burgoyne, Robert D.
PY - 1991/9/9
Y1 - 1991/9/9
N2 - The fluorescent Ca2+ indicator Fura 2 was used to monitor Ca2+ release induced by the Ins(1,4,5)P3-mobilizing agonist angiotensin II (Ag II), caffeine and 2,5-di-(tert-butyl)-1,4-benzohydroquinone (tuBHQ), in intact bovine adrenal chromaffin cells. Under low external Ca2+ conditions, tuBHQ, Ag II and caffeine elicited Ca2+ rises, indicating Ca2+ release from internal stores. Prior addition of Ag II had no noticeable effect on the extent of release of Ca2+ induced by tuBHQ. Stimulation of the cells with tuBHQ before either Ag II or caffeine, similarly had no effect on Ca2+ released by these two agonists. It was concluded, therefore, that there is a third intracellular Ca2+ store in bovine adrenal chromaffin cells, distinct and non-overlapping, from those sensitive to caffeine or Ins(1,4,5)P3-Mobilizing agonists.
AB - The fluorescent Ca2+ indicator Fura 2 was used to monitor Ca2+ release induced by the Ins(1,4,5)P3-mobilizing agonist angiotensin II (Ag II), caffeine and 2,5-di-(tert-butyl)-1,4-benzohydroquinone (tuBHQ), in intact bovine adrenal chromaffin cells. Under low external Ca2+ conditions, tuBHQ, Ag II and caffeine elicited Ca2+ rises, indicating Ca2+ release from internal stores. Prior addition of Ag II had no noticeable effect on the extent of release of Ca2+ induced by tuBHQ. Stimulation of the cells with tuBHQ before either Ag II or caffeine, similarly had no effect on Ca2+ released by these two agonists. It was concluded, therefore, that there is a third intracellular Ca2+ store in bovine adrenal chromaffin cells, distinct and non-overlapping, from those sensitive to caffeine or Ins(1,4,5)P3-Mobilizing agonists.
KW - 2,5-Di-(tert-butyl)-1,4-benzohydroquinone
KW - Caffeine
KW - Chromaffin cell
KW - Inositol 1,4,5-trisphosphate
KW - Intracellular Ca store
U2 - 10.1016/0014-5793(91)81057-F
DO - 10.1016/0014-5793(91)81057-F
M3 - Journal article
C2 - 1915840
AN - SCOPUS:0025868189
VL - 289
SP - 151
EP - 154
JO - FEBS Letters
JF - FEBS Letters
SN - 0014-5793
IS - 2
ER -