IMPLICATIONS OF THYROID HORMONES (TH) IN REXINOIDS ANTI-LYMPHOMA ACTIVITY: INTEGRIN ALPHA V BETA 3 INHIBITION IN THE TREATMENT OF T CELL LYMPHOMA (TCL) WITH BEXAROTENE

JOHANNA ABIGAIL DÍAZ ALBUJA ; GRACIELA ALICIA CREMASCHI; HELENA ANDREA STERLE ; MARIA FLORENCIA CAYROL; MARIA MERCEDES DEBERNARDI; MARIA CELESTE DIAZ FLAQUE

Mar del Plata

Congreso; REUNIÓN ANUAL DE SOCIEDADES DE BIOCIENCIA 2019; 2019

SAIC

Bexarotene (Bex), a RXR agonist used for cutaneous TLC treatment, is associated with clinical hypothyroidism, thus requiring the concomitant administration of levothyroxine (T4). We found that physiological levels of TH contribute to the malignant phenotype of TCL via the TH membrane receptor (mTR), the integrin alphaVbeta3. Here we investigated the consequence of T4 on the antineoplastic effect of Bex in different TCL subtypes. We confirm the presence of the RXR by WB in our panel of TCL subtypes. BEx effect in vitro on apoptosis and proliferation of CUTLL1, OCI-Ly12 and OCI- Ly13.2 TCL cells was higher in the absence than in the presence of TH supplementation (p