Effects of differentiation on purinergic and neurotensin-mediated calcium signaling in human HT-29 colon cancer cells

被引：1
|
作者：
Chowdhury, Mohammad A. [1 ]
Peters, Amelia A. [1 ]
Roberts-Thomson, Sarah J. [1 ]
Monteith, Gregory R. [1 ]
机构：
[1] Univ Queensland, Sch Pharm, Brisbane, Qld 4072, Australia
来源：
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS | 2013年 / 439卷 / 01期
关键词：
Differentiation; Colon cancer; Purinergic receptors; Neurotensin receptors; Calcium signaling; INTESTINAL ALKALINE-PHOSPHATASE; KRUPPEL-LIKE FACTOR; EXPRESSION; RECEPTORS; TRANSPORT; THERAPY; GENE; LINE;
D O I：
10.1016/j.bbrc.2013.08.034
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
Calcium signaling is a key regulator of processes important in differentiation. In colon cancer cells differentiation is associated with altered expression of specific isoforms of calcium pumps of the endoplasmic reticulum and the plasma membrane, suggesting that differentiation of colon cancer cells is associated with a major remodeling of calcium homeostasis. Purinergic and neurotensin receptor activation are known regulators of cytosolic free Ca2+ levels in colon cancer cells. This study aimed to assess changes in cytosolic free Ca2+ levels in response to ATP and neurotensin with differentiation induced by sodium butyrate or culturing post-confluence. Parameters assessed included peak cytosolic free Ca2+ level after activation; time to reach peak cytosolic free Ca2+ and the EC50 of dose response curves. Our results demonstrate that differentiation of HT-29 colon cancer cells is associated with a remodeling of both ATP and neurotensin mediated Ca2+ signaling. Neurotensin-mediated calcium signaling appeared more sensitive to differentiation than ATP-mediated Ca2+ signaling. (c) 2013 Elsevier Inc. All rights reserved.
引用
收藏
页码：35 / 39
页数：5
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