Preserving salivary gland physiology against genotoxic damage - the Tousled way.

Preserving salivary gland physiology against genotoxic damage - the Tousled way.
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DOI:
10.1111/odi.12836
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发表时间:
2018-11
期刊:
影响因子:
3.8
通讯作者:
Sunavala-Dossabhoy G
Sunavala-Dossabhoy G
中科院分区:
医学3区
文献类型:
--
作者:
Sunavala-Dossabhoy G

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Tousled及其同源物是存在于植物和动物中的进化上保守的丝氨酸/苏氨酸激酶。人类Tousled样激酶TLK 1和TLK 2参与DNA复制过程中的染色质组装、有丝分裂过程中的染色体分离以及DNA损伤反应和修复。它们具有高度的序列相似性,但几乎没有非冗余功能。我们的实验室研究了TLK 1,发现它通过加速双链断裂(DSB)修复来增加细胞对电离辐射(IR)损伤的抵抗力。DSB是威胁生命的病变,修复后可恢复DNA完整性并促进细胞存活。我们实验室的一个主要重点是剖析TLK 1在DSB反应和修复中的作用,并研究其在避免唾液腺功能减退中的作用,唾液腺功能减退是一种总是困扰接受局部放疗的患者的疾病。抗沉默因子1(ASF 1),组蛋白H3和Rad 9作为TLK 1底物的鉴定将蛋白质与染色质组织和DNA损伤反应和修复联系起来。然而,最近发现的新的相互作用的合作伙伴,包括NEK 1表明,TLK 1可能发挥更广泛的作用,在DSB修复。本文综述了DNA损伤反应和DSB修复的简要概述,并强调了我们目前对TLK 1在这一过程中的理解。
Tousled and its homologs are evolutionarily conserved serine/threonine kinases present in plants and animals. Human Tousled-like kinases, TLK1 and TLK2, are implicated in chromatin assembly during DNA replication, chromosome segregation during mitosis, as well as in DNA damage response and repair. They share a high degree of sequence similarity, but have few non-redundant functions. Our lab has studied TLK1, and found that it increases the resistance of cells to ionizing radiation (IR) damage through expedited double strand break (DSB) repair. DSBs are life-threatening lesions which when repaired restore DNA integrity and promote cell survival. A major focus in our lab is to dissect TLK1’s role in DSB response and repair and study its usefulness in averting salivary gland hypofunction, a condition that invariably afflicts patients undergoing regional radiotherapy. The identification of anti-silencing factor 1 (ASF1), histone H3, and Rad9 as substrates of TLK1 links the protein to chromatin organization and DNA damage response and repair. However, recent findings of new interacting partners that include NEK1 suggest that TLK1 may play a broader role in DSB repair. This review provides a brief overview of the DNA damage response and DSB repair, and it highlights our current understanding of TLK1 in the process.
干细胞移植在辐照腺体中的干细胞移植后拯救唾液腺功能。
DOI: 10.1371/journal.pone.0002063
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DOI: 10.1186/s12867-016-0056-x
发表时间: 2016-02-09
影响因子: --
作者:
Awate S;De Benedetti A
通讯作者: De Benedetti A