scholarly journals Coassembled Cytotoxic and Pegylated Peptide Amphiphiles Form Filamentous Nanostructures with Potent Antitumor Activity in Models of Breast Cancer

ACS Nano ◽  
2012 ◽  
Vol 6 (9) ◽  
pp. 7956-7965 ◽  
Author(s):  
Daniel J. Toft ◽  
Tyson J. Moyer ◽  
Stephany M. Standley ◽  
Yves Ruff ◽  
Andrey Ugolkov ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Antitumor Activity ◽  
Peptide Amphiphiles

Antitumor Activity and Underlying Mechanism of Phomoxanthone B in MCF7 Cells

2020 ◽  
Vol 20 ◽  
Author(s):  
Chuan Chen ◽  
Ziyue Zhao ◽  
Qian Dong ◽  
XueHui Gao ◽  
Huibin Xu ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Cell Cycle ◽  
Antitumor Activity ◽  
Oxidative Phosphorylation ◽  
Tumor Cells ◽  
Transcriptome Analysis ◽  
Mcf7 Cells ◽  
Er Positive ◽  
Induced Apoptosis ◽  
Positive Breast Cancer

Background:: Xanthones are a class of heterocyclic natural products, which are promising sources of anticancer leads. Phomoxanthone B（PXB）and Phomoxanthone A（PXA）are xanthone dimers. PXA is well studied as an anti-cancer agent, but PXB is not. In our study, PXB was isolated from the endophytic fungus Phomopsis sp. By254. Objective:: The purpose of this study was to identify the underlying anti-tumor mechanisms of PXB in breast cancer MCF7 cell line. Methods:: Apoptosis, cell cycle, proliferation, invasion and migration assays were used to assess the antitumor activity of PXB. RNA sequencing was used to analyze the effect of PXB treatment on gene expression in MCF7 cells. Results:: PXB showed cytotoxicity toward a variety of tumor cells, especially MCF7 cells. PXB inhibited the migration and invasion, arrested cell cycle at G2/M phase and induced apoptosis associated with caspase-3 activation in MCF7 cells. The detailed transcriptome analysis revealed that PXB affected several pathways related to tumorigenesis, metabolisms-, and oxidative phosphorylation in MCF7 cells. KEGG transcriptome analysis revealed that PXB upregulated pro-survival signal pathways such as MAPK, PI3K-AKT and STAT3 pathways. We found that PXB also significantly upregulated the expression of IL24, DDIT3 and XAF1, which may contribute to PXB-induced apoptosis. We further found that PXB may downregulate oxidative phosphorylation by decreasing the expression of electron transport chain genes, especially MT-ND1, which is a potential unfavorable prognostic marker for ER-positive breast cancer. Conclusion:: PXB exerts strong cytotoxicity against human tumor cells and has a potential for ER-positive breast cancer treatment.

scholarly journals Co-delivery of 5-fluorodeoxyuridine and doxorubicin via gold nanoparticle equipped with affibody-DNA hybrid strands for targeted synergistic chemotherapy of HER2 overexpressing breast cancer

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Chao Zhang ◽  
Fanghua Zhang ◽  
Mengnan Han ◽  
Xuming Wang ◽  
Jie Du ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Antitumor Activity ◽  
Solid Phase ◽  
Clinical Care ◽  
Drug Loading ◽  
Her2 Positive ◽  
Apoptosis Pathway ◽  
Phase Synthesis ◽  
Drug Nanocarriers ◽  
Dual Drug

AbstractCombination chemotherapy is still of great importance as part of the standard clinical care for patients with HER2 positive breast cancer. As an attractive component, gold nanoparticles (AuNPs) have been extensively studied as biosafety nanomaterials, but they are rarely explored as drug nanocarriers for targeted co-delivery of multiple chemotherapeutics. Herein, a novel affibody-DNA hybrid strands modified AuNPs were fabricated for co-loading nucleoside analogue (5-fluorodeoxyuridine, FUdR) and anthracycline (doxorubicin, Dox). FUdRs were integrated into DNA hybrid strands decorated on AuNPs by DNA solid phase synthesis, and Dox molecules were intercalated into their duplex regions. Affibody molecules coupled to the DNA hybrid strands were distributed the surface of AuNPs, giving them targeting for HER2. The new dual-drug-containing affibody-DNA-AuNPs (Dox@affi-F/AuNPs) owned compact and stable spherical nanostructures, and precise drug loading. Cytotoxicity tests demonstrated that these nanoparticles caused a higher inhibition in HER2 overexpressing breast cancer cells, and showed better synergistic antitumor activity than simple mixture of the two drugs. The related mechanistic studies proved that Dox@affi-F/AuNPs achieved a remarkable combined antitumor activity of Dox and FUdR by promoting more cells to enter apoptosis pathway. Our work provided a nanomedicine platform for targeted co-delivery of nucleoside analog therapeutics and anthracycline anticancer drugs to achieve synergistic treatment of HER2+ cancer.

Dual mTORC1/2 and HER2 Blockade Results in Antitumor Activity in Preclinical Models of Breast Cancer Resistant to Anti-HER2 Therapy

2012 ◽  
Vol 18 (9) ◽  
pp. 2603-2612 ◽  
Author(s):  
Celina García-García ◽  
Yasir H. Ibrahim ◽  
Violeta Serra ◽  
Maria Teresa Calvo ◽  
Marta Guzmán ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Antitumor Activity ◽  
Preclinical Models

Phase II Trial of Anastrozole Plus Goserelin in the Treatment of Hormone Receptor–Positive, Metastatic Carcinoma of the Breast in Premenopausal Women

2010 ◽  
Vol 28 (25) ◽  
pp. 3917-3921 ◽  
Author(s):  
Robert. W. Carlson ◽  
Richard Theriault ◽  
Christine M. Schurman ◽  
Edgardo Rivera ◽  
Cathie T. Chung ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Metastatic Breast Cancer ◽  
Antitumor Activity ◽  
Phase Ii ◽  
Hormone Receptor ◽  
Phase Ii Trial ◽  
Hot Flashes ◽  
Metastatic Breast ◽  
Premenopausal Women ◽  
Hormone Receptor Positive

Purpose To explore the antitumor activity of the aromatase inhibitor, anastrozole, in the treatment of premenopausal women with hormone receptor–positive, metastatic breast cancer who have been rendered functionally postmenopausal with the use of the luteinizing hormone-releasing hormone agonist, goserelin. Patients and Methods Premenopausal women with estrogen and/or progesterone receptor–positive, metastatic or recurrent breast cancer were enrolled in this prospective, single-arm, multicenter phase II trial. Patients were treated with goserelin 3.6 mg subcutaneous monthly and began anastrozole 1-mg daily 21 days after the first injection of goserelin. Patients continued on treatment until disease progression or unacceptable toxicity. Results Thirty-five patients were enrolled of which 32 were evaluable for response and toxicity. Estradiol suppression was assessed, with mean estradiol levels of 18.7 pg/mL at 3 months and 14.8 pg/mL at 6 months. One participant (3.1%) experienced a complete response, 11 (34.4%) experienced partial response, and 11 (34.4%) experienced stable disease for 6 months or longer for a clinical benefit rate of 71.9%. Median time to progression was 8.3 months (range, 2.1 to 63+) and median survival was not been reached (range, 11.1 to 63+). The most common adverse events were fatigue (50%), arthralgias (53%), and hot flashes (59%). There were no grade 4 to 5 toxicities. Conclusion The combination of goserelin plus anastrozole has substantial antitumor activity in the treatment of premenopausal women with hormone receptor–positive metastatic breast cancer.

scholarly journals Preclinical and Clinical Effects of Mistletoe against Breast Cancer

2014 ◽  
Vol 2014 ◽  
pp. 1-15 ◽  
Author(s):  
Mohsen Marvibaigi ◽  
Eko Supriyanto ◽  
Neda Amini ◽  
Fadzilah Adibah Abdul Majid ◽  
Saravana Kumar Jaganathan
Keyword(s):  
Breast Cancer ◽  
Clinical Trials ◽  
Antitumor Activity ◽  
Cancer Patients ◽  
Remission Rate ◽  
Self Regulation ◽  
Herbal Medicines ◽  
Clinical Effects ◽  
Breast Cancer Patients ◽  
Mistletoe Extract

Breast cancer is among the most frequent types of cancer in women worldwide. Current conventional treatment options are accompanied by side effects. Mistletoe is amongst the important herbal medicines traditionally used as complementary remedies. An increasing number of studies have reported anticancer activity of mistletoe extracts on breast cancer cells and animal models. Some recent evidence suggests that cytotoxic activity of mistletoe may be mediated through different mechanisms. These findings provide a good base for clinical trials. Various studies on mistletoe therapy for breast cancer patients revealed similar findings concerning possible benefits on survival time, health-related quality of life (HRQoL), remission rate, and alleviating adverse reactions to conventional therapy. This review provides an overview of the recent findings on preclinical experiments and clinical trials of mistletoe for its cytotoxic and antitumor activity and its effect on HRQoL in breast cancer patients. Moreover, studies investigating molecular and cellular mechanisms underlying antitumor activity of mistletoe are discussed in this paper. The analyzed trials provided evidence that there might be a combination of pharmacological and motivational aspects mediated by the mistletoe extract application which may contribute to the clinical benefit and positive outcome such as improved HRQoL and self-regulation in breast cancer patients.

Sign in / Sign up

Export Citation Format

Share Document