In situ evidence of cellular senescence in thymic epithelial cells (TECs) during human thymic involution
Authors
Barbouti, AEvangelou, K
Pateras, IS
Papoudou-Bai, A
Patereli, A
Stefanaki, K
Rontogianni, D
Munoz-Espin, D
Kanavaros, P
Gorgoulis, Vassilis G
Affiliation
Department of Anatomy-Histology-Embryology, Medical School, University of Ioannina, Ioannina, GreeceIssue Date
2019
Metadata
Show full item recordAbstract
The DNA damage response (DDR) is a designation for a number of pathways that protects our DNA from various damaging agents. In normal cells, the DDR is extremely important for maintaining genome integrity, but in cancer cells these mechanisms counteract therapy-induced DNA damage. Inhibition of the DDR could therefore be used to increase the efficacy of anti-cancer treatments. Hyperthermia is an example of such a treatment-it inhibits a sub-pathway of the DDR, called homologous recombination (HR). It does so by inducing proteasomal degradation of BRCA2 -one of the key HR factors. Understanding the precise mechanism that mediates this degradation is important for our understanding of how hyperthermia affects therapy and how homologous recombination and BRCA2 itself function. In addition, mechanistic insight into the process of hyperthermia-induced BRCA2 degradation can yield new therapeutic strategies to enhance the effects of local hyperthermia or to inhibit HR. Here, we investigate the mechanisms driving hyperthermia-induced BRCA2 degradation. We find that BRCA2 degradation is evolutionarily conserved, that BRCA2 stability is dependent on HSP90, that ubiquitin might not be involved in directly targeting BRCA2 for protein degradation via the proteasome, and that BRCA2 degradation might be modulated by oxidative stress and radical scavengers.Citation
Barbouti A, Evangelou K, Pateras IS, Papoudou-Bai A, Patereli A, Stefanaki K, et al. In situ evidence of cellular senescence in thymic epithelial cells (TECs) during human thymic involution. Mech Ageing Dev. 2019 Jan;177:88-90.Journal
Mechanisms of Ageing and DevelopmentDOI
10.1016/j.mad.2018.02.005PubMed ID
29490231Additional Links
https://dx.doi.org/10.1016/j.mad.2018.02.005Type
ArticleLanguage
enae974a485f413a2113503eed53cd6c53
10.1016/j.mad.2018.02.005