Thyroid hormones induce doxorubicin chemosensitivity through enzymes involved in chemotherapy metabolism in lymphoma T cells.

Thyroid hormones induce doxorubicin chemosensitivity through enzymes involved in chemotherapy metabolism in lymphoma T cells. Oncotarget. 2019 Apr 30;10(32):3051-3065 Authors: Díaz Flaqué MC, Cayrol MF, Sterle HA, Del Rosario Aschero M, Díaz Albuja JA, Isse B, Farías RN, Cerchietti L, Rosemblit C, Cremaschi GA Abstract Thyroid hormones (THs) - 3,3',5-triiodo-L-thyronine (T3) and L-thyroxine (T4) - are important regulators of the metabolism and physiology of most normal tissues. Cytochrome P450 family 3A members are drug metabolizing enzymes involved in the activation and detoxification of several drugs. CYP3A4 is the major enzyme involved in the metabolism of chemotherapeutic drugs. In this work, we demonstrate that THs induce a significant increase in CYP3A4 mRNA levels, protein expression and metabolic activity through the membrane receptor integrin αvβ3 and the activation of signalling pathways through Stat1 and NF-κB. We reasoned that TH-induced CYP3A4 modulation may act as an important regulator in the metabolism of doxorubicin (Doxo). Experiments in vitro demonstrated that in CYP3A4-knocked down cells, no TH-mediated chemosensitivity to Doxo was observed. We also found that THs modulate these functions by activating the membrane receptor integrin αvβ3. In addition, we showed that the thyroid status can modulate CYP450 mRNA levels in tumor and liver tissues, and the tumor volume in response to chemotherapy in vivo. In f...
Source: Oncotarget - Category: Cancer & Oncology Tags: Oncotarget Source Type: research