USP7 Deregulation Impairs S Phase Specific DNA Repair after Irradiation in Breast Cancer Cells
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USP7 Deregulation Impairs S Phase Specific DNA Repair after Irradiation in Breast Cancer Cells. / Vogt, Marie; Classen, Sandra; Krause, Ann Kristin; Peter, Nadja Juanita; Petersen, Cordula; Rothkamm, Kai; Borgmann, Kerstin; Meyer, Felix.
in: BIOMEDICINES, Jahrgang 12, Nr. 4, 762, 29.03.2024.Publikationen: SCORING: Beitrag in Fachzeitschrift/Zeitung › SCORING: Zeitschriftenaufsatz › Forschung › Begutachtung
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TY - JOUR
T1 - USP7 Deregulation Impairs S Phase Specific DNA Repair after Irradiation in Breast Cancer Cells
AU - Vogt, Marie
AU - Classen, Sandra
AU - Krause, Ann Kristin
AU - Peter, Nadja Juanita
AU - Petersen, Cordula
AU - Rothkamm, Kai
AU - Borgmann, Kerstin
AU - Meyer, Felix
PY - 2024/3/29
Y1 - 2024/3/29
N2 - The ubiquitin specific protease 7 (USP7) is a deubiquitinating enzyme with numerous substrates. Aberrant expression of USP7 is associated with tumor progression. This study aims to investigate how a deregulated USP7 expression affects chromosomal instability and prognosis of breast cancer patients in silico and radiosensitivity and DNA repair in breast cancer cells in vitro. The investigations in silico were performed using overall survival and USP7 mRNA expression data of breast cancer patients. The results showed that a high USP7 expression was associated with increased chromosomal instability and decreased overall survival. The in vitro experiments were performed in a luminal and a triple-negative breast cancer cell line. Proliferation, DNA repair, DNA replication stress, and survival after USP7 overexpression or inhibition and irradiation were analyzed. Both, USP7 inhibition and overexpression resulted in decreased cellular survival, distinct radiosensitization and an increased number of residual DNA double-strand breaks in the S phase following irradiation. RAD51 recruitment and base incorporation were decreased after USP7 inhibition plus irradiation and more single-stranded DNA was detected. The results show that deregulation of USP7 activity disrupts DNA repair in the S phase by increasing DNA replication stress and presents USP7 as a promising target to overcome the radioresistance of breast tumors.
AB - The ubiquitin specific protease 7 (USP7) is a deubiquitinating enzyme with numerous substrates. Aberrant expression of USP7 is associated with tumor progression. This study aims to investigate how a deregulated USP7 expression affects chromosomal instability and prognosis of breast cancer patients in silico and radiosensitivity and DNA repair in breast cancer cells in vitro. The investigations in silico were performed using overall survival and USP7 mRNA expression data of breast cancer patients. The results showed that a high USP7 expression was associated with increased chromosomal instability and decreased overall survival. The in vitro experiments were performed in a luminal and a triple-negative breast cancer cell line. Proliferation, DNA repair, DNA replication stress, and survival after USP7 overexpression or inhibition and irradiation were analyzed. Both, USP7 inhibition and overexpression resulted in decreased cellular survival, distinct radiosensitization and an increased number of residual DNA double-strand breaks in the S phase following irradiation. RAD51 recruitment and base incorporation were decreased after USP7 inhibition plus irradiation and more single-stranded DNA was detected. The results show that deregulation of USP7 activity disrupts DNA repair in the S phase by increasing DNA replication stress and presents USP7 as a promising target to overcome the radioresistance of breast tumors.
U2 - 10.3390/biomedicines12040762
DO - 10.3390/biomedicines12040762
M3 - SCORING: Journal article
C2 - 38672118
VL - 12
JO - BIOMEDICINES
JF - BIOMEDICINES
SN - 2227-9059
IS - 4
M1 - 762
ER -