Search results for " triple negative breast cancer"

Analysis of miRNA expression profile induced by short term starvation in breast cancer cells treated with doxorubicin

2017

// Sergio Rizzo 1, * , Antonina Cangemi 1, * , Antonio Galvano 1, * , Daniele Fanale 1 , Silvio Buscemi 2 , Marcello Ciaccio 3 , Antonio Russo 1 , Sergio Castorina 4, 5, # and Viviana Bazan 1, # 1 Department of Surgical, Oncological and Oral Sciences, Section of Medical Oncology, University of Palermo, Palermo, Italy 2 Department of Internal and Specialistic Medicine (DIBIMIS), Laboratory of Clinical Nutrition, University of Palermo, Palermo, Italy 3 Section of Clinical Biochemistry and Clinical Molecular Medicine, Department of Biopathology and Medical Biotechnology, University of Palermo, U.O.C. Laboratory Medicine, Policlinico University Hospital, Palermo, Italy 4 Fondazione Mediterranea…

Triple negative breast cancer: shedding light onto the role of pi3k/akt/mtor pathway

2016

// Daniela Massihnia 1,* , Antonio Galvano 1,* , Daniele Fanale 1 , Alessandro Perez 1 , Marta Castiglia 1 , Lorena Incorvaia 1 , Angela Listi 1 , Sergio Rizzo 1 , Giuseppe Cicero 1 , Viviana Bazan 1 , Sergio Castorina 2,3,** and Antonio Russo 1,** 1 Department of Surgical, Oncological and Oral Sciences, Section of Medical Oncology, University of Palermo, Palermo, Italy 2 Fondazione Mediterranea “G.B. Morgagni”, Catania, Italy 3 Department of Biomedical and Biotechnological Sciences, University of Catania, Catania, Italy * These authors have contributed equally to this work ** Both the authors are last name Correspondence to: Antonio Russo, email: // Keywords : ER, HER2, PI3K/AKT/mTOR inhib…

A‐1210477 sensitizes TRAIL-induced apoptosis in MDA-MB-231 Triple Negative Breast Cancer cells.

2018

Triple negative breast cancer (TNBC) is a form of BC characterized by high aggressiveness, therapy resistance, short time to relapse, poor prognosis. The presence of Cancer Stem Cells (CSCs) could be responsible for TNBC resistance to therapy, recurrence and metastasis, and might explain the difficult of its eradication. Mcl-1 is one of the key regulators of CSCs self-renewal and its expression can limit the efficacy of antitumorigenic agents as TRAIL, a selective anticancer agent but with limited effects against some cancer cell lines. Here we investigated the expression profiles of Mcl-1 in TNBC tissue and cell lines. We also evaluated the effect of A-1210477, a selective Mcl-1 inhibitor,…

NF-κB is a potential pharmacological target in triple negative breast cancers.

2015

Triple negative breast cancers (TNBCs), characterized by lack of estrogen, progesterone and HER2 receptors, are a highly heterogenous group of tumors which account for about 20% to 25% of all breast cancers. TNBCs are often associated with epithelial-mesenchymal transition and a high propensity for early metastasis. Since no molecularly-targeted therapeutic agents are clinically available for TNBCs, these tumors, which are frequently resistant to cytotoxic chemotherapy, remain difficult to treat. Nevertheless, progress is being made in the finding of molecular alterations typical of TNBCs toward which to focus therapeutic efforts.

The HDAC inhibitor SAHA synergistically stimulates the cytotoxic effect induced by Parthenolide in MDA-MB231 cells

2014

We showed that the sesquiterpene lactone Parthenolide (PN) exerts strong cytotoxic effects on triple negative breast cancer MDA-MB231 cells. Our recent results suggest that PN exerts in these cells a cytoprotective effect, which is due to the activation of mTOR pathway. To inhibit this protective response we employ the HDAC inhibitor SAHA, which is known to prevent AKT/mTOR pathway. We show that PN activates Akt, mTOR, p70S6kinase and NRF2 while SAHA abolishes these effects. Further cell pretreatment with SAHA synergistically sensitizes the cells to the cytotoxic effect of PN. Moreover SAHA alone activates the autophagic process. The addition of PN to SAHA reduces this effect and induces ap…

Cholesterol-Inulin Conjugates for Efficient SN38 Nuclear Delivery: Nanomedicines for Precision Cancer Therapy

2022

An amphiphilic inulin-thiocholesterol conjugate (INU-Cys-TC) was strategically designed as a biodegradable core-shell nanocarrier of 7-ethyl-10-hydroxy-camptothecin (SN38) to enhance its solubility and stability in aqueous media, thus exploiting its brilliant anticancer effect. INU-Cys-TC was designed to have the hydrophilic inulin backbone (external shell) partially functionalized with hydrophobic thiocholesterol moieties (internal core) through a biodegradable disulfide bond due to cysteamine bridges. Thiocholesterol moieties impair redox-sensitive self-assembling abilities, yielding to nano-sized micelles in aqueous media capable of efficiently encapsulating a high amount of SN38 (DL = 8…

EFFECTS OF CELLULAR SHORT-TERM STARVATION ON CONVENTIONAL CHEMOTHERAPY RESPONSE IN HUMAN CANCER: UNDERSTANDING OF MOLECULAR MECHANISMS AND MICRORNAS …

Background: Short Term Starvation (STS) is a type of dietary restriction able to reduce tumorigenesis and cancer progression but molecular bases of this effect are still unclear. Aim: In vitro analysis of STS effects in presence of chemotherapy and evaluation of microRNAs (miRNAs) involvement. Results: STS affects the expression profiles of miRNAs involved in chemotherapy response leading to cancer cells sensitization and to healthy cells protection.