Lost in translocation: the functions of the 18-kD translocator protein.

Lost in translocation: the functions of the 18-kD translocator protein.
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DOI:
10.1016/j.tem.2015.04.001
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发表时间:
2015-07
期刊:
Trends in endocrinology and metabolism: TEM
影响因子:
--
通讯作者:
Banati RB
Banati RB
中科院分区:
其他
文献类型:
--
作者:
Gut P;Zweckstetter M;Banati RB

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最近的敲除研究的18 kDa的转运蛋白(TSPO)报告正常或潜伏的表型,引起怀疑的蛋白质的类固醇生成的作用和早期数据的有效性,特别是在TSPO结合药物的特异性和选择性。在这里,我们总结了现有的蛋白质结构数据,并根据这些建议的TSPO和其假定的内源性配体的调节功能。我们举例说明了内在的限制,推理功能丧失的研究和讨论的挑战,在定义基因的“功能”,是复杂的相互作用的新兴属性。对于通过更好地表征TSPO结合药物的靶向/脱靶效应来降低临床试验中晚期失败风险的呼吁,现在由于使用TSPO空白背景动物而变得更加复杂,我们增加了对定义不清的术语“神经炎症”的更有区别的理解的呼吁,该术语目前支持TSPO作为诊断或治疗靶点的论点
Recent knock-out studies of the 18 kDa-translocator-protein (TSPO) report normal or latent phenotypes, raising doubts about the protein’s purported role in steroidogenesis and the validity of earlier data, notably in regard to the specificity and selectivity of TSPO-binding drugs. Here, we summarize available protein structural data and based on these suggest regulatory functions of TSPO and its putative endogenous ligands. We illustrate with examples the inherent limits of inference in loss-of-function studies and discuss the challenge in defining gene ‘functions’ that are emergent properties of complex interactions. To the call to reduce the risk of late-stage failure in clinical trials through better characterization of target/off-target effects of TSPO-binding drugs, now fascilitated by the use of TSPO null-background animals, we add a call for a more differentiated understanding of the ill-defined term ‘neuroinflammation’ that currently underpins the argument for TSPO as a diagnostic or therapeutic target
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