Suppression of erythropoiesis by dietary nitrate.

Suppression of erythropoiesis by dietary nitrate.
复制标题

DOI:
10.1096/fj.14-263004
复制
发表时间:
2015-03
期刊:
FASEB journal : official publication of the Federation of American Societies for Experimental Biology
影响因子:
--
通讯作者:
Murray AJ
Murray AJ
中科院分区:
其他
文献类型:
--
作者:
Ashmore T;Fernandez BO;Evans CE;Huang Y;Branco-Price C;Griffin JL;Johnson RS;Feelisch M;Murray AJ

文献摘要

参考文献

相似文献

在哺乳动物中,低氧触发的促红细胞生成素释放会增加红细胞质量,以满足组织的氧气需求。使用雄性Wistar大鼠,我们揭示了一条以前未知的红细胞生成调控途径,涉及NO代谢物和普遍存在的饮食成分硝酸盐的抑制控制。我们发现,在常氧和低氧条件下,通过饮食干预可以达到的浓度,循环中的血红蛋白水平受到硝酸盐的调节;与未添加/补充氯化钠的对照组相比,通过饮用水给予中等剂量的硝酸盐(7 mg NaNO3/kg体重/d)在6天后降低了血红蛋白浓度和红细胞压积。其潜在机制是抑制肝脏促红细胞生成素的表达,与组织缺氧标志物的下调有关,提示PO2增加。然而,在较高的硝酸盐剂量下,这种作用发生了部分逆转;伴随着肾脏促红细胞生成素表达的增加和低氧诱导因子的稳定,这可能是由相对贫血引起的。因此,肝脏和肾脏的低氧感知通路协同作用,调节血红蛋白对硝酸盐的反应,汇聚在适合环境/生理状况的最佳最低血红蛋白浓度。因此,硝酸盐抑制肝脏促红细胞生成素的表达可能会降低血液粘度,同时使氧气供应与需求相匹配,而肾脏氧气感应可以起到刹车作用,避免红细胞压积的潜在有害下降。--Ashmore,T.,Fernandez,B.O.,Evans,C.E.,Huang,Y.,Branco-Price,C.,Griffin,J.L.,Johnson,R.S.,Feelisch,M.,Murray,A.J.膳食硝酸盐抑制红细胞生成。
In mammals, hypoxia-triggered erythropoietin release increases red blood cell mass to meet tissue oxygen demands. Using male Wistar rats, we unmask a previously unrecognized regulatory pathway of erythropoiesis involving suppressor control by the NO metabolite and ubiquitous dietary component nitrate. We find that circulating hemoglobin levels are modulated by nitrate at concentrations achievable by dietary intervention under normoxic and hypoxic conditions; a moderate dose of nitrate administered via the drinking water (7 mg NaNO3/kg body weight/d) lowered hemoglobin concentration and hematocrit after 6 d compared with nonsupplemented/NaCl-supplemented controls. The underlying mechanism is suppression of hepatic erythropoietin expression associated with the downregulation of tissue hypoxia markers, suggesting increased pO2. At higher nitrate doses, however, a partial reversal of this effect occurred; this was accompanied by increased renal erythropoietin expression and stabilization of hypoxia-inducible factors, likely brought about by the relative anemia. Thus, hepatic and renal hypoxia-sensing pathways act in concert to modulate hemoglobin in response to nitrate, converging at an optimal minimal hemoglobin concentration appropriate to the environmental/physiologic situation. Suppression of hepatic erythropoietin expression by nitrate may thus act to decrease blood viscosity while matching oxygen supply to demand, whereas renal oxygen sensing could act as a brake, averting a potentially detrimental fall in hematocrit.—Ashmore, T., Fernandez, B. O., Evans, C. E., Huang, Y., Branco-Price, C., Griffin, J. L., Johnson, R. S., Feelisch, M., Murray, A. J. Suppression of erythropoiesis by dietary nitrate.
DOI: 10.1007/s10522-004-7381-z
发表时间: 2005-01-01
期刊: BIOGERONTOLOGY
影响因子: 4.5
作者:
Kang, MJ;Kim, HJ;Chung, HY
通讯作者: Chung, HY
DOI: 10.1073/pnas.0306706101
发表时间: 2004-03-23
影响因子: 11.1
作者:
Bryan, NS;Rassaf, T;Feelisch, M
通讯作者: Feelisch, M
DOI: 10.1073/pnas.1002443107
发表时间: 2010-06-22
影响因子: 11.1
作者:
Beall, Cynthia M.;Cavalleri, Gianpiero L.;Zheng, Yong Tang
通讯作者: Zheng, Yong Tang
DOI: 10.1182/blood-2004-05-1695
发表时间: 2005-04-15
期刊: BLOOD
影响因子: 20.3
作者:
Scortegagna, M;Ding, K;Garcia, JA
通讯作者: Garcia, JA
DOI: 10.1111/j.1365-2362.2005.01525.x
发表时间: 2005-12-01
影响因子: 5.5
作者:
Eckardt, KU;Kurtz, A
通讯作者: Kurtz, A