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Casein kinase I delta (CKIdelta) is involved in lymphocyte physiology.
European Journal of Cell Biology ( IF 6.6 ) Pub Date : 2003-08-20 , DOI: 10.1078/0171-9335-00323
Tanja Maritzen 1 , Jürgen Löhler , Wolfgang Deppert , Uwe Knippschild
Affiliation  

The casein kinase I isoform delta (CKIdelta) plays an important role in vesicular trafficking, chromosome segregation, cell cycle progression, cytokinesis, developmental processes, and circadian rhythm. In this study we examined the distribution pattern of CKIdelta and quantified its kinase activity in various tissues of BALB/c mice. Whereas CKIdelta is ubiquitously expressed, differences in the kinase activity were detected in organs with comparable CKIdelta protein levels. To elucidate the role of CKIdelta in splenocytes, which displayed the highest kinase activity, the cell type-specific distribution of CKIdelta within the spleen was investigated. Immunohistochemical analysis revealed a strong CKIdelta immunolabeling in lymphoid cells of the white pulp, while in the red pulp CKIdelta immunoreactivity was found in cells of various haematopoietic lineages. Furthermore, high CKIdelta kinase acitivity was observed in isolated lymphocytes and granulocytes of young BALB/c mice. In lymphocytes the CKIdelta activity increased upon mitogenic stimulation, whereas upon gamma-irradiation CKIdelta protein and activity levels were diminished. Interestingly, the comparison of CKIdelta activity in p53+/+ and p53-/- lymphocytes revealed a higher activity in p53+/+ lymphocytes. In addition, we observed an increased immunostaining in cells of hyperplastic B follicles and advanced B-cell lymphomas in p53-deficient mice. Thus, our results indicate that CKIdelta plays several roles in lymphocyte physiology.

中文翻译:

酪蛋白激酶Iδ(CKIdelta)参与淋巴细胞生理学。

酪蛋白激酶I同工型δ(CKIdelta)在水泡运输,染色体分离,细胞周期进程,胞质分裂,发育过程和昼夜节律中起重要作用。在这项研究中,我们检查了CKIdelta的分布模式,并定量了BALB / c小鼠各种组织中其激酶活性。尽管CKIdelta普遍表达,但在具有可比的CKIdelta蛋白水平的器官中检测到了激酶活性的差异。为了阐明CKIdelta在脾细胞中的作用,脾细胞表现出最高的激酶活性,研究了脾脏中CKIdelta的细胞类型特异性分布。免疫组织化学分析显示,在白色牙髓的淋巴样细胞中有很强的CKIdelta免疫标记,而在红色纸浆中,在各种造血谱系的细胞中均发现了KIDELTA免疫反应性。此外,在年轻的BALB / c小鼠的分离的淋巴细胞和粒细胞中观察到了较高的CKIdelta激酶活性。在淋巴细胞中,有丝分裂刺激后CKIdelta活性增加,而在伽马射线辐照后CKIdelta蛋白和活性水平降低。有趣的是,p53 + / +和p53-/-淋巴细胞中CKIdelta活性的比较表明p53 + / +淋巴细胞中的活性较高。此外,我们观察到在p53缺陷小鼠中增生性B卵泡和晚期B细胞淋巴瘤细胞中的免疫染色增加。因此,我们的结果表明CKIdelta在淋巴细胞生理学中起着多种作用。在年轻的BALB / c小鼠的分离的淋巴细胞和粒细胞中观察到了较高的CKIdelta激酶活性。在淋巴细胞中,有丝分裂刺激后CKIdelta活性增加,而在伽马射线辐照后CKIdelta蛋白和活性水平降低。有趣的是,p53 + / +和p53-/-淋巴细胞中CKIdelta活性的比较表明p53 + / +淋巴细胞中的活性较高。此外,我们观察到在p53缺陷小鼠中增生性B卵泡和晚期B细胞淋巴瘤细胞中的免疫染色增加。因此,我们的结果表明CKIdelta在淋巴细胞生理学中起着多种作用。在年轻的BALB / c小鼠的分离的淋巴细胞和粒细胞中观察到了高的CKIdelta激酶活性。在淋巴细胞中,有丝分裂刺激后CKIdelta活性增加,而在伽马射线辐照后CKIdelta蛋白和活性水平降低。有趣的是,p53 + / +和p53-/-淋巴细胞中CKIdelta活性的比较表明p53 + / +淋巴细胞中的活性较高。此外,我们观察到在p53缺陷小鼠中增生性B卵泡和晚期B细胞淋巴瘤细胞中的免疫染色增加。因此,我们的结果表明CKIdelta在淋巴细胞生理学中起着多种作用。比较p53 + / +和p53-/-淋巴细胞的CKIdelta活性可以发现p53 + / +淋巴细胞的活性较高。此外,我们观察到在p53缺陷小鼠中增生性B卵泡和晚期B细胞淋巴瘤细胞中的免疫染色增加。因此,我们的结果表明CKIdelta在淋巴细胞生理学中起着多种作用。比较p53 + / +和p53-/-淋巴细胞的CKIdelta活性可以发现p53 + / +淋巴细胞的活性较高。此外,我们观察到在p53缺陷小鼠中增生性B卵泡和晚期B细胞淋巴瘤细胞中的免疫染色增加。因此,我们的结果表明CKIdelta在淋巴细胞生理学中起着多种作用。
更新日期:2019-11-01
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