Glutathione-responsive nanoparticles based on a sodium alginate derivative for selective release of doxorubicin in tumor cells

2017 ◽  
Vol 5 (12) ◽  
pp. 2337-2346 ◽  
Author(s):  
Cheng Gao ◽  
Fan Tang ◽  
Jianxiang Zhang ◽  
Simon M. Y. Lee ◽  
Ruibing Wang
Keyword(s):  
Drug Release ◽  
Cancer Cells ◽  
Tumor Cells ◽  
Sodium Alginate ◽  
Safety Profile

GSH-responsive nanoparticles based on disulfide crosslinked amphiphilic alginate demonstrated selected drug release in cancer cells with a much improved safety profile.

pH-Responsive prodrug nanoparticles based on a sodium alginate derivative for selective co-release of doxorubicin and curcumin into tumor cells

Nanoscale ◽  
2017 ◽  
Vol 9 (34) ◽  
pp. 12533-12542 ◽  
Author(s):  
Cheng Gao ◽  
Fan Tang ◽  
Guiyi Gong ◽  
Jianxiang Zhang ◽  
Maggie P. M. Hoi ◽  
...  
Keyword(s):  
Cancer Cells ◽  
Tumor Cells ◽  
Sodium Alginate ◽  
Safety Profile ◽  
Ph Sensitive ◽  
Efficacy And Safety ◽  
Ph Responsive

A pH-sensitive prodrug nanoparticle demonstrated the selective co-delivery of doxorubicin and curcumin into cancer cells with much improved efficacy and safety profile.

scholarly journals Docetaxel-Loaded Disulfide Cross-Linked Nanoparticles Derived from Thiolated Sodium Alginate for Colon Cancer Drug Delivery

Pharmaceutics ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 38 ◽  
Author(s):  
Hock Ing Chiu ◽  
Asila Dinie Ayub ◽  
Siti Nur Aishah Mat Yusuf ◽  
Noorfatimah Yahaya ◽  
Erazuliana Abd Kadir ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Drug Delivery ◽  
Colon Cancer ◽  
Drug Release ◽  
Cancer Cells ◽  
Sodium Alginate ◽  
Cancer Drug ◽  
Colon Cancer Cells ◽  
Cancer Drug Delivery ◽  
Ht 29

In this study, fluorescein-labelled wheat germ agglutinin (fWGA)-conjugated disulfide cross-linked sodium alginate nanoparticles were developed to specifically target docetaxel (DTX) to colon cancer cells. Different amounts of 3-mercaptopropionic acid (MPA) were covalently attached to sodium alginate to form thiolated sodium alginate (MPA1–5). These polymers were then self-assembled and air-oxidised to form disulfide cross-linked nanoparticles (MP1–5) under sonication. DTX was successfully loaded into the resulting MP1–5 to form DTX-loaded nanoparticles (DMP1–5). DMP2 had the highest loading efficiency (17.8%), thus was chosen for fWGA surface conjugation to form fWGA-conjugated nanoparticles (fDMP2) with a conjugation efficiency of 14.1%. Transmission electron microscopy (TEM) and scanning electron microscopy (SEM) analyses showed spherical nanoparticles, and an in vitro drug release study recorded a cumulative drug release of 48.6%. Dynamic light scattering (DLS) analysis revealed a mean diameter (MD) of 289 nm with a polydispersity index (PDI) of 0.3 and a zeta potential of −2.2 mV for fDMP2. HT-29 human colon cancer cells treated with fDMP2 showed lower viability than that of L929 mouse fibroblast cells. These results indicate that fDMP2 was efficiently taken up by HT-29 cells (29.9%). Fluorescence and confocal imaging analyses also showed possible internalisation of nanoparticles by HT-29 cells. In conclusion, fDMP2 shows promise as a DTX carrier for colon cancer drug delivery.

Role of exosomes in diagnosis and therapy of prostate cancer

2020 ◽  
Vol 28 (3) ◽  
pp. 399-405
Author(s):  
Fabrizio Fontana ◽  
Olga A. Babenko
Keyword(s):  
Prostate Cancer ◽  
Cancer Cells ◽  
Tumor Cells ◽  
Biological Fluids ◽  
Diagnosis And Treatment ◽  
Diagnosis And Therapy ◽  
The Future ◽  
Important Direction ◽  
Potential Biomarkers

Aim of this letter is to attract the attention of journal readers to the study of exosomes as an important direction in the development of Oncology, in particular, in the diagnosis and treatment of prostate cancer. Exosomes are produced by tumor cells and regulate proliferation, metastasis, and the development of chemoresistance. Their extraction from biological fluids allows further use of these vesicles as potential biomarkers of prostate cancer. In the future, exosomes can be successfully used in the delivery of drugs and other anti-tumor substances to cancer cells.

The Improvement of Paclitaxel Cytotoxicity using Nanocellulose based Nature Resources

2019 ◽  
Vol 1 (1) ◽  
pp. 7
Author(s):  
R Nahrowi ◽  
A Setiawan ◽  
Noviany Noviany ◽  
I Sukmana ◽  
S D Yuwono
Keyword(s):  
Drug Delivery ◽  
Drug Release ◽  
Natural Resources ◽  
Cell Viability ◽  
Cancer Cells ◽  
Drug Delivery System ◽  
Target Cell ◽  
Mitotic Cycle ◽  
Potential Sources ◽  
Local Accumulation

Paclitaxel is one of the cancer drugs that often used. These drug kills cancer cells byinhibiting mitotic cycle. The efficiency of paclitaxel is increased by the use ofnanomaterials as a carrier of paclitaxel. Nanomaterials can enhance encapsulationefficiency, improve the drug release to the target cell following nanomaterialdegradation, and improve local accumulation of drug in the cell through endocytosisreceptor. Nanomaterial that often used forencapsulation of paclitaxel is a polymerderived from natural resources such as cellulose. The advantages of cellulose as acarrier of paclitaxel are nontoxic, biodegradable, and very abundant from varioussources. One of the potential sources of cellulose for drug delivery system is cassavabaggase.Keywords: Paclitaxel, encapsulation, cell viability, nanocellulose

Characterization and Screening of a Novel Multiparticulate Pulsatile Delivery of Aceclofenac

2016 ◽  
Vol 9 (5) ◽  
pp. 3494-3501
Author(s):  
Bipul Nath ◽  
Santimoni Saikia
Keyword(s):  
Drug Release ◽  
Sodium Alginate ◽  
Alginate Beads ◽  
In Vitro Drug Release ◽  
Dsc Studies ◽  
Ft Ir ◽  
Lag Period ◽  
Pulsatile Delivery ◽  
Ca Alginate

In the present investigation, sodium alginate based multiparticulate system overcoated with time and pH dependent polymer was studied in the form of oral pulsatile system to achieve pulsatile with sustained release of aceclofenac for chronotherapy of rheumatoid arthritis seven batches of micro beads with varying concentration of sodium alginate (2-5 %) were prepared by ionotropic-gelation method using CaCl2 as cross-linking agent. The prepared Ca-alginate beads were coated with 5% Eudragit L100 and filled into pulsatile capsule with varying proportion of plugging materials. Drug loaded microbeads were investigated for physicochemical properties and drug release characteristics. The mean particle sizes of drug-loaded microbeads were found to be in the range 596±1.1 to 860 ± 1.2 micron and %DEE in the range of 65-85%. FT-IR and DSC studies revealed the absence of drug polymer interactions. The release of aceclofenac from formulations F1 to F7 in buffer media (pH 6.8) at the end of 5h was 65.6, 60.7, 55.7, 41.2, 39.2, 27 and 25% respectively. Pulsatile system filled with eudragit coated Ca-alginate microbeads (F2) showed better drug content, particle size, surface topography, in-vitro drug release in a controlled manner. Different plugging materials like Sterculia gum, HPMC K4M and Carbopol were used in the design of pulsatile capsule. The pulsatile system remained intact in buffer pH 1.2 for 2 hours due to enteric coat of the system with HPMCP. The enteric coat dissolved when the pH of medium was changed to 7.4. The pulsatile system developed with Sterculia gum as plugging material showed satisfactory lag period when compared to HPMC and Carbopol.

Recent Advances on Therapeutic Peptides for Breast Cancer Treatment

2020 ◽  
Vol 21 ◽  
Author(s):  
Samad Beheshtirouy ◽  
Farhad Mirzaei ◽  
Shirin Eyvazi ◽  
Vahideh Tarhriz
Keyword(s):  
Breast Cancer ◽  
Cancer Cells ◽  
Tumor Cells ◽  
Breast Cancer Cells ◽  
Specific Binding ◽  
High Specificity ◽  
The Novel ◽  
Anti Cancer ◽  
Therapeutic Peptides ◽  
Low Toxicity

: Breast cancer is a heterogeneous malignancy which is the second cause of mortality among women in the world. Increasing the resistance to anti-cancer drugs in breast cancer cells persuades researchers to search the novel therapies approaches for the treatment of the malignancy. Among the novel methods, therapeutic peptides which target and disrupt tumor cells have been of great interest. Therapeutic peptides are short amino acids monomer chains with high specificity to bind and modulate a protein interaction of interest. Several advantages of peptides such as specific binding on tumor cells surface, low molecular weight and low toxicity on normal cells make the peptides as an appealing therapeutic agents against solid tumors, particularly breast cancer. Also, National Institutes of Health (NIH) describes therapeutic peptides as suitable candidate for the treatment of drug-resistant breast cancer. In this review, we attempt to review the different therapeutic peptides against breast cancer cells which can be used in treatment and diagnosis of the malignancy. Meanwhile, we presented an overview of peptide vaccines which have been developed for the treatment of breast cancer.

Peptide-conjugated PEGylated PAMAM as a highly affinitive nanocarrier towards HER2-overexpressing cancer cells

RSC Advances ◽  
2016 ◽  
Vol 6 (109) ◽  
pp. 107337-107343 ◽  
Author(s):  
Iman Rostami ◽  
ZiJian Zhao ◽  
ZiHua Wang ◽  
WeiKai Zhang ◽  
Yeteng Zhong ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Cancer Cells ◽  
Tumor Cells ◽  
Targeting Peptide

Efficient drug delivery to the tumor cells was carried out with HER2 targeting peptide-conjugated PEGlyted PAMAM.

scholarly journals Photo-Responsive Supramolecular Micelles for Controlled Drug Release and Improved Chemotherapy

2020 ◽  
Vol 22 (1) ◽  
pp. 154
Author(s):  
Fasih Bintang Ilhami ◽  
Kai-Chen Peng ◽  
Yi-Shiuan Chang ◽  
Yihalem Abebe Alemayehu ◽  
Hsieh-Chih Tsai ◽  
...  
Keyword(s):  
Reactive Oxygen Species ◽  
Drug Release ◽  
Visible Light ◽  
Cancer Cells ◽  
Laser Irradiation ◽  
Reactive Oxygen ◽  
Controlled Drug Release ◽  
Grand Challenge ◽  
Supramolecular System ◽  
Oxygen Species

Development of stimuli-responsive supramolecular micelles that enable high levels of well-controlled drug release in cancer cells remains a grand challenge. Here, we encapsulated the antitumor drug doxorubicin (DOX) and pro-photosensitizer 5-aminolevulinic acid (5-ALA) within adenine-functionalized supramolecular micelles (A-PPG), in order to achieve effective drug delivery combined with photo-chemotherapy. The resulting DOX/5-ALA-loaded micelles exhibited excellent light and pH-responsive behavior in aqueous solution and high drug-entrapment stability in serum-rich media. A short duration (1–2 min) of laser irradiation with visible light induced the dissociation of the DOX/5-ALA complexes within the micelles, which disrupted micellular stability and resulted in rapid, immediate release of the physically entrapped drug from the micelles. In addition, in vitro assays of cellular reactive oxygen species generation and cellular internalization confirmed the drug-loaded micelles exhibited significantly enhanced cellular uptake after visible light irradiation, and that the light-triggered disassembly of micellar structures rapidly increased the production of reactive oxygen species within the cells. Importantly, flow cytometric analysis demonstrated that laser irradiation of cancer cells incubated with DOX/5-ALA-loaded A-PPG micelles effectively induced apoptotic cell death via endocytosis. Thus, this newly developed supramolecular system may offer a potential route towards improving the efficacy of synergistic chemotherapeutic approaches for cancer.

Controllable assembly/disassembly of polyphenol-DNA nanocomplex for cascade-responsive drug release in cancer cells

Biomaterials ◽  
2021 ◽  
Vol 273 ◽  
pp. 120846
Author(s):  
Jinpeng Han ◽  
Yuchen Cui ◽  
Zi Gu ◽  
Dayong Yang
Keyword(s):  
Drug Release ◽  
Cancer Cells

scholarly journals The Blockade of Tumoral IL1β-Mediated Signaling in Normal Colonic Fibroblasts Sensitizes Tumor Cells to Chemotherapy and Prevents Inflammatory CAF Activation

2021 ◽  
Vol 22 (9) ◽  
pp. 4960
Author(s):  
Natalia Guillén Díaz-Maroto ◽  
Gemma Garcia-Vicién ◽  
Giovanna Polcaro ◽  
María Bañuls ◽  
Nerea Albert ◽  
...  
Keyword(s):  
Cancer Cells ◽  
Tumor Cells ◽  
Cell Types ◽  
Colorectal Tumor ◽  
Cytotoxic Drugs ◽  
Differential Sensitivity ◽  
Paracrine Signaling ◽  
Inflammatory Phenotype ◽  
Heterotypic Interactions ◽  
Carcinoma Associated Fibroblasts

Heterotypic interactions between newly transformed cells and normal surrounding cells define tumor’s fate in incipient carcinomas. Once homeostasis has been lost, normal resident fibroblasts become carcinoma-associated fibroblasts, conferring protumorogenic properties on these normal cells. Here we describe the IL1β-mediated interplay between cancer cells and normal colonic myofibroblasts (NCFs), which bestows differential sensitivity to cytotoxic drugs on tumor cells. We used NCFs, their conditioned media (CM), and cocultures with tumor cells to characterize the IL1β-mediated crosstalk between both cell types. We silenced IL1β in tumor cells to demonstrate that such cells do not exert an influence on NCFs inflammatory phenotype. Our results shows that IL1β is overexpressed in cocultured tumor cells. IL1β enables paracrine signaling in myofibroblasts, converting them into inflammatory-CAFs (iCAF). IL1β-stimulated-NCF-CM induces migration and differential sensitivity to oxaliplatin in colorectal tumor cells. Such chemoprotective effect has not been evidenced for TGFβ1-driven NCFs. IL1β induces the loss of a myofibroblastic phenotype in NCFs and acquisition of iCAF traits. In conclusion, IL1β-secreted by cancer cells modify surrounding normal fibroblasts to confer protumorogenic features on them, particularly tolerance to cytotoxic drugs. The use of IL1β-blocking agents might help to avoid the iCAF traits acquisition and consequently to counteract the protumorogenic actions these cells.

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