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Acute and chronic lithium treatment increases Wnt/β-catenin transcripts in cortical and hippocampal tissue at therapeutic concentrations in mice
Metabolic Brain Disease ( IF 3.6 ) Pub Date : 2020-11-10 , DOI: 10.1007/s11011-020-00638-8
Vanessa J De-Paula 1, 2, 3 , Carla Cristine C Dos Santos 4 , Maria Carolina A Luque 4, 5 , Taccyana M Ali 4, 5 , Jorge E Kalil 2, 5, 6 , Orestes V Forlenza 6 , Edecio Cunha-Neto 4, 5, 6
Affiliation  

Lithium activates Wnt/β-catenin signaling leading to stabilization of free cytosolic β-catenin. The aim of the present study is to evaluate the in vivo effect of acute and chronic lithium treatment on the expression of β-catenin target genes, addressing its transcripts HIG2, Bcl-xL, Cyclin D1, c-myc, in cortical and hippocampal tissue from adult mice. Lithium doses were established to yield therapeutic working concentrations. In acute treatment, mice received a 300µL of a 350 mg/kg solution of LiCl by gavage, and were euthanized after 2 h, 6 h and 12 h. To determine the effect of chronic treatment, animals were continuously fed either with chow supplemented with 2 g/kg Li2CO3, or regular chow (controls), being euthanized after 30 days. All animals had access to drinking water and 0.9% saline ad libitum. After acute and chronic treatments samples of peripheral blood were obtained from the tail vein for each animal, and serum concentrations of lithium were determined. All transcripts were up-regulated in cortical and hippocampal tissues of lithium-treated mice, both under acute and chronic treatments. There was a positive correlation between serum lithium concentrations and the increment in the expression of all transcripts. This effect was observed in all time points of the acute treatment (i.e., 2, 6 and 12 hours) and also after 30 days. We conclude that Wnt/β-catenin transcriptional response (HIG2, Bcl-xL, Cyclin D1 and c-myc) is up-regulated in the mouse brain in response to acute and chronic lithium treatment at therapeutic concentrations.



中文翻译:

急性和慢性锂治疗会增加小鼠皮质和海马组织中 Wnt/β-catenin 的转录水平

锂激活 Wnt/β-catenin 信号,导致游离细胞溶质 β-catenin 的稳定。本研究的目的是评估急性和慢性锂治疗对 β-连环蛋白靶基因表达的体内影响,解决其在皮质和海马组织中的转录本 HIG2、Bcl-xL、细胞周期蛋白 D1、c-myc来自成年小鼠。确定锂剂量以产生治疗工作浓度。在急性治疗中,小鼠通过管饲法接受 300 µL 350 mg/kg 氯化锂溶液,并在 2 小时、6 小时和 12 小时后实施安乐死。为了确定长期治疗的效果,动物连续喂养补充有 2 g/kg Li2CO3 的食物,或常规食物(对照),30 天后安乐死。所有动物都可以随意获得饮用水和 0.9% 盐水。急性和慢性治疗后,从每只动物的尾静脉采集外周血样本,测定血清锂浓度。在急性和慢性治疗下,锂治疗小鼠的皮质和海马组织中的所有转录物均上调。血清锂浓度与所有转录本表达的增加呈正相关。在急性治疗的所有时间点(即,2、6 和 12 小时)以及 30 天后都观察到了这种效果。我们得出结论,Wnt/β-catenin 转录反应(HIG2、Bcl-xL、Cyclin D1 和 c-myc)在小鼠大脑中响应于治疗浓度的急性和慢性锂治疗而上调。并测定血清锂浓度。在急性和慢性治疗下,锂治疗小鼠的皮质和海马组织中的所有转录物均上调。血清锂浓度与所有转录本表达的增加呈正相关。在急性治疗的所有时间点(即,2、6 和 12 小时)以及 30 天后都观察到了这种效果。我们得出结论,Wnt/β-catenin 转录反应(HIG2、Bcl-xL、Cyclin D1 和 c-myc)在小鼠大脑中响应于治疗浓度的急性和慢性锂治疗而上调。并测定血清锂浓度。在急性和慢性治疗下,锂治疗小鼠的皮质和海马组织中的所有转录物均上调。血清锂浓度与所有转录本表达的增加呈正相关。在急性治疗的所有时间点(即,2、6 和 12 小时)以及 30 天后都观察到了这种效果。我们得出结论,Wnt/β-catenin 转录反应(HIG2、Bcl-xL、Cyclin D1 和 c-myc)在小鼠大脑中响应于治疗浓度的急性和慢性锂治疗而上调。血清锂浓度与所有转录本表达的增加呈正相关。在急性治疗的所有时间点(即,2、6 和 12 小时)以及 30 天后都观察到了这种效果。我们得出结论,Wnt/β-catenin 转录反应(HIG2、Bcl-xL、Cyclin D1 和 c-myc)在小鼠大脑中响应于治疗浓度的急性和慢性锂治疗而上调。血清锂浓度与所有转录本表达的增加呈正相关。在急性治疗的所有时间点(即,2、6 和 12 小时)以及 30 天后都观察到了这种效果。我们得出结论,Wnt/β-catenin 转录反应(HIG2、Bcl-xL、Cyclin D1 和 c-myc)在小鼠大脑中响应于治疗浓度的急性和慢性锂治疗而上调。

更新日期:2020-12-17
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