Rat brain iron concentration is lower following perinatal copper deficiency.

Rat brain iron concentration is lower following perinatal copper deficiency.
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围产期缺铜后,大鼠脑内铁浓度较低。

DOI:
10.1111/j.1471-4159.2005.03091.x
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发表时间:
2005
影响因子:
4.7
通讯作者:
Gybina,AnnaA
Gybina,AnnaA
中科院分区:
医学2区
文献类型:
--
作者:
Prohaska,JosephR;Gybina,AnnaA

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用Holtzman大鼠进行的实验表明,在胚胎第7天开始缺铜(-Cu)治疗的母鼠出生和喂养的幼仔中,出生后第13天(P13)的脑铁(Fe)较低。P24-P26雄性和雌性的经心灌注以去除血液Fe污染,结果显示-Cu中的脑Fe仍比+Cu大鼠低20%。估计的血液含量的脑-铜大鼠大于+铜大鼠;对于所有组,值范围在0.43和1.03%之间。使用组特异性数据和回归分析(r= 0.99,将血铁与血红蛋白相关),在一项重复研究中,非灌注大鼠的脑铁在P13时降低了33%,-Cu大鼠在P24时降低了39%。 通过转铁蛋白受体(TfR 1)的免疫印迹法比较了这些大鼠和断奶后模型P50大鼠的脑提取物。P24脑-Cu/+ CuTfR 1为3.08,提示-Cu大鼠脑确实缺铁。 P_(13)大鼠的这一比值为1.44,p <0.05。 P50-Cu大鼠脑TfR 1或Fe含量没有变化,尽管血浆Fe减少了50%。 结果提示,围产期脑铁积累依赖于充足的铜营养。
Experiments performed with Holtzman rats demonstrated that brain iron (Fe) was lower by postnatal day 13 (P13) in pups born and nursed by dams that began copper‐deficient (–Cu) treatment at embryonic day 7. Transcardial perfusion of P24–P26 males and females to remove blood Fe contamination revealed that brain Fe was still 20% lower in –Cu than +Cu rats. Estimated blood content of brain for –Cu rats was greater than for +Cu rats; for all groups, values ranged between 0.43 and 1.03%. Using group‐specific data and regression analyses,r= 0.99, relating blood Fe to hemoglobin, brain Fe in non‐perfused rats in a replicate study was lower by 33% at P13 and 39% at P24 in –Cu rats. Brain extracts from these rats and from P50 rats from a post‐weaning model were compared by immunobloting for transferrin receptor (TfR1). P24 brain –Cu/+Cu TfR1 was 3.08, suggesting that brains of –Cu rats were indeed Fe deficient. This ratio in P13 rats was 1.44,p< 0.05. No change in P50 –Cu rat brain TfR1 or Fe content was detected despite a 50% reduction in plasma Fe. The results suggest that brain Fe accumulation depends on adequate Cu nutriture during perinatal development.
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