A polyamine pathway-mediated mitogenic mechanism in enterochromaffin-like cells of Mastomys.
A polyamine pathway-mediated mitogenic mechanism in enterochromaffin-like cells of Mastomys.
复制标题
乳鼠肠嗜铬样细胞中多胺途径介导的有丝分裂机制。
DOI:
10.1152/ajpgi.1998.275.2.g370
复制
发表时间:
1998
期刊:
影响因子:
--
通讯作者:
Modlin,IM
中科院分区:
文献类型:
--
作者:
Kidd,M;Tang,LH;Schmid,SW;Miu,K;Modlin,IM
We have previously demonstrated that inMastomysspecies proliferation of gastric enterochromaffin-like (ECL) cells is predominantly regulated by gastrin and by transforming growth factor-α (TGF-α) in the naive and neoplastic state, respectively. In this study we examined whether these intracellular mitogenic responses are mediated by polyamines and ornithine decarboxylase (ODC), the rate-limiting enzyme for polyamine biosynthesis. An ECL cell preparation of high purity was used to measure the effect of the polyamine derivatives putrescine, spermidine, and spermine on DNA synthesis by bromodeoxyuridine uptake. Both putrescine and spermidine augmented gastrin-stimulated, but not basal, DNA synthesis in naive cells. This proliferative response correlated with an increase in ODC activity that was partially inhibited (20%) by difluoromethylornithine (DFMO), an inhibitor of ODC (IC50, 30 pM). In contrast, all polyamines increased both basal and TGF-α-stimulated DNA synthesis as well as ODC activity in tumor ECL cells. DFMO completely inhibited the proliferative response of TGF-α (IC50, 3 pM). Thus polyamine biosynthesis is involved in proliferation of ECL cells and in particular the mitogenesis of tumor cells, suggesting a role for this pathway in the regulation of ECL cell transformation.
登录
查看更多内容
影响因子:
5.2
作者:
I. Modlin;Laura H. Tang;G. Lawton;UMER M. Darr;Zhao;C. Soroka
通讯作者:
C. Soroka
DOI:
10.1152/ajpgi.1989.256.5.g846
发表时间:
1989
期刊:
The American journal of physiology
影响因子:
--
作者:
J. Scemama;L. de Vries;L. Pradayrol;C. Seva;H. Tronchère;N. Vaysse
通讯作者:
N. Vaysse
DOI:
10.1152/ajpgi.1988.255.3.g304
发表时间:
1988
期刊:
The American journal of physiology
影响因子:
--
作者:
Johnson,LR;Tseng,CC;Tipnis,UR;Haddox,MK
通讯作者:
Haddox,MK
影响因子:
--
作者:
C. Seva;J. Scemama;L. Pradayrol;P. Sarfati;N. Vaysse
通讯作者:
N. Vaysse
影响因子:
11.2
作者:
Basu,HS;Feuerstein,BG;Deen,DF;Lubich,WP;Bergeron,RJ;Samejima,K;Marton,LJ
通讯作者:
Marton,LJ