Targeted photoresponsive TiO2–coumarin nanoconjugate for efficient combination therapy in MDA-MB-231 breast cancer cells: synergic effect of photodynamic therapy (PDT) and anticancer drug chlorambucil

MedChemComm ◽  
2015 ◽  
Vol 6 (5) ◽  
pp. 769-777 ◽  
Author(s):  
Moumita Gangopadhyay ◽  
Sourav K. Mukhopadhyay ◽  
S. Karthik ◽  
Shrabani Barman ◽  
N. D. Pradeep Singh
Keyword(s):  
Breast Cancer ◽  
Photodynamic Therapy ◽  
Combination Therapy ◽  
Cancer Cells ◽  
Anticancer Drug ◽  
Breast Cancer Cells ◽  
Single Component ◽  
Synergic Effect ◽  
Nanoparticle System ◽  
First Time

We have developed for the first time an excellent targeted metallic single component nanoparticle system for combination of PDT and chemotherapy.

scholarly journals Breast Cancer Cell Re-Dissemination from Lung Metastases—A Mechanism for Enhancing Metastatic Burden

2021 ◽  
Vol 10 (11) ◽  
pp. 2340
Author(s):  
Lucia Borriello ◽  
John Condeelis ◽  
David Entenberg ◽  
Maja H. Oktay
Keyword(s):  
Breast Cancer ◽  
Cancer Cells ◽  
Cancer Cell ◽  
Metastatic Disease ◽  
Breast Cancer Cells ◽  
Lung Metastases ◽  
Primary Tumors ◽  
Metastatic Burden ◽  
First Time ◽  
Do So

Although metastatic disease is the primary cause of mortality in cancer patients, the mechanisms leading to overwhelming metastatic burden are still incompletely understood. Metastases are the endpoint of a series of multi-step events involving cancer cell intravasation, dissemination to distant organs, and outgrowth to metastatic colonies. Here we show, for the first-time, that breast cancer cells do not solely disseminate to distant organs from primary tumors and metastatic nodules in the lymph nodes, but also do so from lung metastases. Thus, our findings indicate that metastatic dissemination could continue even after the removal of the primary tumor. Provided that the re-disseminated cancer cells initiate growth upon arrival to distant sites, cancer cell re-dissemination from metastatic foci could be one of the crucial mechanisms leading to overt metastases and patient demise. Therefore, the development of new therapeutic strategies to block cancer cell re-dissemination would be crucial to improving survival of patients with metastatic disease.

Photodynamic therapy activities of phthalocyanine-based macromolecular photosensitizers on MCF-7 breast cancer cells

2021 ◽  
pp. 1-10
Author(s):  
Erem Ahmetali ◽  
Pinar Sen ◽  
N. Ceren Süer ◽  
Tebello Nyokong ◽  
Tarik Eren ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Photodynamic Therapy ◽  
Cancer Cells ◽  
Breast Cancer Cells ◽  
Mcf 7

scholarly journals Tioconazole and Chloroquine Act Synergistically to Combat Doxorubicin-Induced Toxicity via Inactivation of PI3K/AKT/mTOR Signaling Mediated ROS-Dependent Apoptosis and Autophagic Flux Inhibition in MCF-7 Breast Cancer Cells

2021 ◽  
Vol 14 (3) ◽  
pp. 254
Author(s):  
Afnan H. El-Gowily ◽  
Samah A. Loutfy ◽  
Ehab M. M. Ali ◽  
Tarek M. Mohamed ◽  
Mohammed A. Mansour
Keyword(s):  
Breast Cancer ◽  
Combination Therapy ◽  
Cancer Cells ◽  
Breast Cancer Cells ◽  
Mtor Pathway ◽  
Tumor Growth Inhibition ◽  
Autophagic Flux ◽  
Ki 67 ◽  
Mcf 7

Cancer is a complex devastating disease with enormous treatment challenges, including chemo- and radiotherapeutic resistance. Combination therapy demonstrated a promising strategy to target hard-to-treat cancers and sensitize cancer cells to conventional anti-cancer drugs such as doxorubicin. This study aimed to establish molecular profiling and therapeutic efficacy assessment of chloroquine and/or tioconazole (TIC) combination with doxorubicin (DOX) as anew combination model in MCF-7 breast cancer. The drugs are tested against apoptotic/autophagic pathways and related redox status. Molecular docking revealed that chloroquine (CQ) and TIC could be potential PI3K and ATG4B pathway inhibitors. Combination therapy significantly inhibited cancer cell viability, PI3K/AkT/mTOR pathway, and tumor-supporting autophagic flux, however, induced apoptotic pathways and altered nuclear genotoxic feature. Our data revealed that the combination cocktail therapy markedly inhibited tumor proliferation marker (KI-67) and cell growth, along with the accumulation of autophagosomes and elevation of LC3-II and p62 levels indicated autophagic flux blockage and increased apoptosis. Additionally, CQ and/or TIC combination therapy with DOX exerts its activity on the redox balance of cancer cells mediated ROS-dependent apoptosis induction achieved by GPX3 suppression. Besides, Autophagy inhibition causes moderately upregulation in ATGs 5,7 redundant proteins strengthened combinations induced apoptosis, whereas inhibition of PI3K/AKT/mTOR pathway with Beclin-1 upregulation leading to cytodestructive autophagy with overcome drug resistance effectively in curing cancer. Notably, the tumor growth inhibition and various antioxidant effects were observed in vivo. These results suggest CQ and/or TIC combination with DOX could act as effective cocktail therapy targeting autophagy and PI3K/AKT/mTOR pathways in MCF-7 breast cancer cells and hence, sensitizes cancer cells to doxorubicin treatment and combat its toxicity.

ABCB1/MDR1 contributes to the anticancer drug-resistant phenotype of IPH-926 human lobular breast cancer cells

2012 ◽  
Vol 315 (2) ◽  
pp. 153-160 ◽  
Author(s):  
Till Krech ◽  
Elisa Scheuerer ◽  
Robert Geffers ◽  
Hans Kreipe ◽  
Ulrich Lehmann ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Cancer Cells ◽  
Anticancer Drug ◽  
Breast Cancer Cells ◽  
Drug Resistant ◽  
Lobular Breast Cancer ◽  
Resistant Phenotype ◽  
Drug Resistant Phenotype

scholarly journals MAPK4 silencing together with a PARP1 inhibitor as a combination therapy in triple‑negative breast cancer cells

2021 ◽  
Vol 24 (2) ◽  
Author(s):  
Xiaoqi Zeng ◽  
Shanshan Jiang ◽  
Simin Ruan ◽  
Zhaoze Guo ◽  
Jingyun Guo ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Combination Therapy ◽  
Cancer Cells ◽  
Triple Negative Breast Cancer ◽  
Breast Cancer Cells ◽  
Triple Negative
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