Retracted Article: Radio frequency triggered curcumin delivery from thermo and pH responsive nanoparticles containing gold nanoparticles and its in vivo localization studies in an orthotopic breast tumor model

RSC Advances ◽  
2014 ◽  
Vol 4 (74) ◽  
pp. 39408-39427 ◽  
Author(s):  
N. Sanoj Rejinold ◽  
Reju George Thomas ◽  
Muthunarayanan Muthiah ◽  
K. P. Chennazhi ◽  
In-Kyu Park ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Breast Cancer Cells ◽  
Tumor Model ◽  
Ph Responsive ◽  
Rf Exposure ◽  
Retracted Article ◽  
4T1 Breast Cancer ◽  
Induced Apoptosis ◽  
Breast Tumor Model

RF responsive gold nanoparticles containing curcumin encapsulated chitosan-graft-poly(N-vinyl caprolactam) induced apoptosis on 4T1 breast cancer cells on RF exposure.

scholarly journals Retraction: Radio frequency triggered curcumin delivery from thermo and pH responsive nanoparticles containing gold nanoparticles and its in vivo localization studies in an orthotopic breast tumor model

RSC Advances ◽  
2020 ◽  
Vol 10 (48) ◽  
pp. 28483-28483
Author(s):  
N. Sanoj Rejinold ◽  
Reju George Thomas ◽  
Muthunarayanan Muthiah ◽  
K. P. Chennazhi ◽  
In-Kyu Park ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Radio Frequency ◽  
Breast Tumor ◽  
Tumor Model ◽  
Ph Responsive ◽  
Breast Tumor Model

Retraction of ‘Radio frequency triggered curcumin delivery from thermo and pH responsive nanoparticles containing gold nanoparticles and its in vivo localization studies in an orthotopic breast tumor model’ by N. Sanoj Rejinold et al., RSC Adv., 2014, 4, 39408–39427, DOI: 10.1039/C4RA05727A.

scholarly journals A New Highlight of Ephedra alata Decne Properties as Potential Adjuvant in Combination with Cisplatin to Induce Cell Death of 4T1 Breast Cancer Cells In Vitro and In Vivo

Cells ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 362 ◽  
Author(s):  
Fairouz Sioud ◽  
Souheila Amor ◽  
Imène ben Toumia ◽  
Aida Lahmar ◽  
Virginie Aires ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Cancer Cells ◽  
Breast Cancer Cells ◽  
Protective Action ◽  
Dependent Manner ◽  
4T1 Breast Cancer ◽  
Induced Apoptosis ◽  
Cellular Modifications

Despite major advances in the last 10 years, whether in terms of prevention or treatment, the 5 year survival rate remains relatively low for a large number of cancers. These therapeutic failures can be the consequence of several factors associated with the cellular modifications or with the host by itself, especially for some anticancer drugs such as cisplatin, which induces a nephrotoxicity. In the strategy of research for active molecules capable both of exerting a protective action against the deleterious effects of cisplatin and exerting a chemosensitizing action with regard to cancer cells, we tested the potential effects of Ephedra alata Decne extract (E.A.) rich in polyphenolic compounds towards a 4T1 breast cancer model in vitro and in vivo. We showed that E.A. extract inhibited cell viability of 4T1 breast cancer cells and induced apoptosis in a caspase-dependent manner, which involved intrinsic pathways. Very interestingly, we observed a synergic antiproliferative and pro-apoptotic action with cisplatin. These events were associated with a strong decrease of breast tumor growth in mice treated with an E.A./cisplatin combination and simultaneously with a decrease of hepato- and nephrotoxicities of cisplatin.

scholarly journals Transcription Factor AP-2α Is Preferentially Cleaved by Caspase 6 and Degraded by Proteasome during Tumor Necrosis Factor Alpha-Induced Apoptosis in Breast Cancer Cells

2001 ◽  
Vol 21 (15) ◽  
pp. 4856-4867 ◽  
Author(s):  
Okot Nyormoi ◽  
Zhi Wang ◽  
Dao Doan ◽  
Maribelis Ruiz ◽  
David McConkey ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Breast Cancer Cells ◽  
Tumor Necrosis ◽  
Necrosis Factor Alpha ◽  
Tnf Α ◽  
Factor Alpha ◽  
Caspase 6 ◽  
Induced Apoptosis ◽  
Necrosis Factor

ABSTRACT Several reports have linked activating protein 2α (AP-2α) to apoptosis, leading us to hypothesize that AP-2α is a substrate for caspases. We tested this hypothesis by examining the effects of tumor necrosis factor alpha (TNF-α) on the expression of AP-2 in breast cancer cells. Here, we provide evidence that TNF-α downregulates AP-2α and AP-2γ expression posttranscriptionally during TNF-α-induced apoptosis. Both a general caspase antagonist (zVADfmk) and a caspase 6-preferred antagonist (zVEIDfmk) inhibited TNF-α-induced apoptosis and AP-2α downregulation. In vivo tests showed that AP-2α was cleaved by caspases ahead of the DNA fragmentation phase of apoptosis. Recombinant caspase 6 cleaved AP-2α preferentially, although caspases 1 and 3 also cleaved it, albeit at 50-fold or higher concentrations. Activated caspase 6 was detected in TNF-α-treated cells, thus confirming its involvement in AP-2α cleavage. All three caspases cleaved AP-2α at asp19 of the sequence asp-arg-his-asp (DRHD19). Mutating D19 to A19abrogated AP-2α cleavage by all three caspases. TNF-α-induced cleavage of AP-2α in vivo led to AP-2α degradation and loss of DNA-binding activity, both of which were prevented by pretreatment with zVEIDfmk. AP-2α degradation but not cleavage was inhibited in vivo by PS-431 (a proteasome antagonist), suggesting that AP-2α is degraded subsequent to cleavage by caspase 6 or caspase 6-like enzymes. Cells transfected with green fluorescent protein-tagged mutant AP-2α are resistant to TNF-α-induced apoptosis, further demonstrating the link between caspase-mediated cleavage of AP-2α and apoptosis. This is the first report to demonstrate that degradation of AP-2α is a critical event in TNF-α-induced apoptosis. Since the DRHD sequence in vertebrate AP-2 is widely conserved, its cleavage by caspases may represent an important mechanism for regulating cell survival, proliferation, differentiation, and apoptosis.

Receptor-Mediated In Vivo Targeting of Breast Cancer Cells with 17α-Ethynylestradiol-Conjugated Silica-Coated Gold Nanoparticles

Langmuir ◽  
2020 ◽  
Vol 36 (48) ◽  
pp. 14819-14828
Author(s):  
Alexander M. Renner ◽  
Shaista Ilyas ◽  
Hans A. Schlößer ◽  
Annika Szymura ◽  
Stefan Roitsch ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Gold Nanoparticles ◽  
Cancer Cells ◽  
Breast Cancer Cells

Garcinol sensitizes breast cancer cells to Taxol through the suppression of caspase-3/iPLA2and NF-κB/Twist1 signaling pathways in a mouse 4T1 breast tumor model

2017 ◽  
Vol 8 (3) ◽  
pp. 1067-1079 ◽  
Author(s):  
Shih-Hsin Tu ◽  
Yi-Shiou Chiou ◽  
Nagabhushanam Kalyanam ◽  
Chi-Tang Ho ◽  
Li-Ching Chen ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Cancer Cells ◽  
Signaling Pathways ◽  
Breast Tumor ◽  
Breast Cancer Cells ◽  
Caspase 3 ◽  
Tumor Model ◽  
Breast Tumor Model

Garcinol sensitizes breast cancer cells to Taxolviasynergistically inducing antimitotic effects and effectively repressing the activation of caspase-3/iPLA2and Taxol-promoted NF-κB/Twist1 signaling pathways.

Fabrication of a pH responsive DOX conjugated PEGylated palladium nanoparticle mediated drug delivery system: an in vitro and in vivo evaluation

RSC Advances ◽  
2015 ◽  
Vol 5 (56) ◽  
pp. 44998-45014 ◽  
Author(s):  
Krishnamurthy Shanthi ◽  
Karuppaiya Vimala ◽  
Dhanaraj Gopi ◽  
Soundarapandian Kannan
Keyword(s):  
Drug Delivery ◽  
Drug Delivery System ◽  
Delivery System ◽  
Hela Cells ◽  
Ph Responsive ◽  
Palladium Nanoparticle ◽  
In Vivo Evaluation ◽  
Induced Apoptosis

Schematic illustration of the possible mechanism of pH based drug delivery system of DOX conjugated PEGylated PdNPs induced apoptosis in HeLa cells.

scholarly journals Development and Evaluation of 2-Amino-7-Fluorophenazine 5,10-Dioxide Polymeric Micelles as Antitumoral Agents for 4T1 Breast Cancer

Polymers ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 71
Author(s):  
Nicole Lecot ◽  
Belén Dávila ◽  
Carina Sánchez ◽  
Marcelo Fernández ◽  
Mercedes González ◽  
...  
Keyword(s):  
Polymeric Micelles ◽  
Metastatic Breast ◽  
Stage Iv ◽  
Tumor Model ◽  
Infrared Analysis ◽  
Biological Studies ◽  
Potential Applications ◽  
4T1 Breast Cancer

2-Amino-7-fluorophenazine 5,10-dioxide (FNZ) is a bioreducible prodrug, poorly soluble in water, with potential anticancer activity on hypoxic-tumors. This poor solubility limits its potential applications in clinic. Amphiphilic pristine polymeric micelles (PMs) based on triblock copolymers Pluronic® and Tetronic®, glycosylated derivatives and their mixtures with preformed-liposomes (LPS), were analyzed as strategies to improve the bioavailability of FNZ. FNZ encapsulations were performed and the obtaining nanostructures were characterized using UV-visible spectroscopy (UV-VIS), Transmission Electron Microscopy (TEM), Fourier transform infrared analysis and Dynamic Light Scattering (DLS). The most promising nanoformulations were analyzed for their potential toxicity and pharmacologically, at 20 mg/kg FNZ-doses, in a stage-IV murine metastatic-breast tumor model. The results revealed that the solubility of the encapsulated-FNZ increased up to seven times and the analysis (UV-VIS, DLS and TEM) confirmed the interaction between vehicles and FNZ. In all the cases appropriate encapsulation efficiencies (up to 70%), monodisperse nanometric particle sizes (PDI = 0.180–0.335), adequate Z-potentials (−1.59 to −26.4 mV), stabilities and spherical morphologies were obtained. The in vitro profile of FNZ controlled releases corresponded mainly to a kinetic Higuchi model. The in vitro/in vivo biological studies revealed non-toxicity and relevant tumor-weight diminution (up to 61%).

scholarly journals Modification of a Popular Syngeneic Murine Mammary Tumor Model for Immunotherapy Studies

2011 ◽  
Vol 2011 ◽  
pp. 1-8 ◽  
Author(s):  
Armando Rivera ◽  
Xinping Fu ◽  
Lihua Tao ◽  
Xiaoliu Zhang
Keyword(s):  
Tumor Antigen ◽  
Growth Pattern ◽  
Cytotoxic T Cells ◽  
Growth Factor Receptor ◽  
Tumor Model ◽  
Parental Line ◽  
Mammary Tumor Model ◽  
4T1 Breast Cancer

To facilitate the evaluation of immunotherapeutic intervention against malignant diseases, it is desirable to have a syngeneic tumor model that closely resembles the growth pattern of human tumors. Murine 4T1 breast cancer model is known for its metastatic properties that mimic its human counterpart. However, a drawback of this model is the lack of an identified tumor antigen to function as a therapeutic target for immunologic intervention. We used the piggyBac transposon system to stably transduce a tumor antigen, the human epidermal growth factor receptor 2 gene (HER2), into this tumor cell. In vitro characterization shows that the newly established cells have a similar growth pattern as the parental line. In vivo evaluation shows that host immune response was generated against the HER2 tumor antigen, despite the high homology between HER2 and its murine counterpart (neu gene). When implanted into immune-deficient mice, the HER2-expressing 4T1 cells readily formed sizable tumors, indicating that these cells are useful for evaluating the therapeutic effect of adoptively transferred cytotoxic T cells that are specifically raised or modified to target the HER2 tumor antigen.

scholarly journals A Polysaccharide From the Whole Plant of Plantago asiatica L. Enhances the Antitumor Activity of Dendritic Cell-Based Immunotherapy Against Breast Cancer

2021 ◽  
Vol 12 ◽  
Author(s):  
Jiafeng Gao ◽  
Yi-Nan Zhang ◽  
Jingwen Cui ◽  
Jiatong Zhang ◽  
Yuexiang Ming ◽  
...  
Keyword(s):  
Breast Cancer ◽  
T Cells ◽  
Breast Tumor ◽  
Cytotoxic T Cells ◽  
Tumor Model ◽  
Whole Plant ◽  
Plantago Asiatica ◽  
Breast Tumor Model

Dendritic cells (DCs) are the most potent professional antigen-presenting cells (APCs) that mediate T-cell immune responses. Breast cancer is one of the most commonly diagnosed diseases and its mortality rate is higher than any other cancer in both humans and canines. Plantain polysaccharide (PLP), extracted from the whole plant of Plantago asiatica L., could promote the maturation of DCs. In this research, we found that PLP could upregulate the maturation of DCs both in vitro and in vivo. PLP-activated DCs could stimulate lymphocytes’ proliferation and differentiate naive T cells into cytotoxic T cells. Tumor antigen-specific lymphocyte responses were enhanced by PLP and CIPp canine breast tumor cells lysate-pulsed DCs, and PLP and CIPp-cell-lysate jointly stimulated DCs cocultured with lymphocytes having the great cytotoxicity on CIPp cells. In the 4T1 murine breast tumor model, PLP could control the size of breast tumors and improve immunity by recruiting DCs, macrophages, and CD4+ and CD8+ T cells in the tumor microenvironment. These results indicated that PLP could achieve immunotherapeutic effects and improve immunity in the breast tumor model.

Sign in / Sign up

Export Citation Format

Share Document