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Cancer drug delivery

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https://www.readbyqxmd.com/read/29667478/retro-inverso-follicle-stimulating-hormone-peptide-mediated-polyethylenimine-complexes-for-targeted-ovarian-cancer-gene-therapy
#1
Mengyu Zhang, Mingxing Zhang, Jing Wang, Qingqing Cai, Ran Zhao, Yi Yu, Haiyan Tai, Xiaoyan Zhang, Congjian Xu
BACKGROUND: The development of nanoparticle drug delivery systems with targeted ligands has the potential to increase treatment efficiency in ovarian cancer. METHODS: We developed a 21-amino acid peptide, YTRDLVYGDPARPGIQGTGTF (L-FP21) conjugated to polyethylenimine (PEI) and methoxy polyethylene glycol (mPEG) to prepare a nanoparticle drug vehicle to target follicle-stimulating hormone receptor (FSHR) in ovarian cancer. At the same time, we optimized the ligand of the nanoparticle vehicle using D-peptides, which consist of D-amino acids (D-FP21)...
November 2018: Drug Delivery
https://www.readbyqxmd.com/read/29667346/in-situ-vaccination-harvesting-low-hanging-fruit-on-the-cancer-immunotherapy-tree
#2
REVIEW
Mee Rie Sheen, Steven Fiering
After 100 years of debate, it is clear that cancer is recognized by the immune system and this has generated immense interest in cancer immunotherapy. The systemic nature of the immune system gives immunotherapy the ability to treat metastatic disease, which currently requires chemotherapy that frequently fails. Like chemotherapy, most immunotherapy is systemically applied in an effort to generate systemic antitumor immune response. However, local administration of immunostimulatory reagents into a recognized tumor by in situ vaccination (ISV) can also generate systemic antitumor immunity to fight metastatic disease...
April 18, 2018: Wiley Interdisciplinary Reviews. Nanomedicine and Nanobiotechnology
https://www.readbyqxmd.com/read/29666858/polytyrosine-nanoparticles-enable-ultra-high-loading-of-doxorubicin-and-rapid-enzyme-responsive-drug-release
#3
Xiaolei Gu, Min Qiu, Huanli Sun, Jian Zhang, Liang Cheng, Chao Deng, Zhiyuan Zhong
Despite the great significance of clinically viable nanovehicles, very few of them exhibit stability and high anticancer drug loading with fast intracellular drug release. Herein, we report that polytyrosine nanoparticles (PTNs) self-assembled from poly(ethylene glycol)-b-poly(l-tyrosine) block copolymer enable the ultra-high loading and rapid enzyme-responsive release of doxorubicin (DOX). Notably, PTNs achieve a remarkably high DOX loading of 63.1 wt% likely due to the existence of strong π-π stacking between polytyrosine and DOX, as shown by UV-vis analysis...
April 18, 2018: Biomaterials Science
https://www.readbyqxmd.com/read/29666835/aptamers-and-apple-pies-a-mini-review-of-psma-aptamers-and-lessons-from-donald-s-coffey
#4
REVIEW
Shawn E Lupold
This mini-review article is part of a special issue dedicated to Donald S. Coffey, a pioneer translational research scientist, exemplary mentor, and leader in urologic and urologic oncology research. This article first briefly reflects on life and scientific lessons from Don Coffey. It then reviews the development of two prostate cancer targeting RNA aptamers, xPSM-A9 and xPSM-A10, through in vitro selection for aptamers that bind to the extracellular domain of the Prostate Specific Membrane Antigen (PSMA)...
2018: American Journal of Clinical and Experimental Urology
https://www.readbyqxmd.com/read/29665439/hyaluronic-acid-conjugated-nanoparticle-delivery-of-sirna-against-twist-reduces-tumor-burden-and-enhances-sensitivity-to-cisplatin-in-ovarian-cancer
#5
Sophia A Shahin, Ruining Wang, Shirleen I Simargi, Altagracia Contreras, Liliana Parra, Louise Qu, Wei Wen, Thanh Dellinger, Juli Unternaehrer, Fuyuhiko Tamanoi, Jeffrey I Zink, Carlotta A Glackin
TWIST protein is critical to development and is activated in many cancers. TWIST regulates epithelial-mesenchymal transition, and is linked to angiogenesis, metastasis, cancer stem cell phenotype, and drug resistance. The majority of epithelial ovarian cancer (EOC) patients with metastatic disease respond well to first-line chemotherapy but most relapse with disease that is both metastatic and drug resistant, leading to a five-year survival rate under 20%. We are investigating the role of TWIST in mediating these relapses...
April 14, 2018: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/29664622/multi-stimuli-responsive-amphiphilic-poly-ester-urethane-nano-assemblies-based-on-l-tyrosine-for-intracellular-drug-delivery-to-cancer-cells
#6
Rajendra Aluri, Sonashree Saxena, Dheeraj Chandra Joshi, Manickam Jayakannan
Multi-stimuli-responsive L-tyrosine based amphiphilic poly(ester-urethane)s nano-carriers were designed and developed, for the first time, to administrate anticancer drugs at cancer tissue environment via thermo-responsiveness and lysosomal enzymatic-biodegradation from single polymer platform. For this purpose, multifunctional L-tyrosine monomer was tailor-made with PEG-lated side chain at the phenolic position along with urethane and carboxylic ester functionalities. Under melt dual ester-urethane polycondensation, the tyrosine-monomer reacted with diols to produce high molecular weight amphiphilic poly(ester-urethane)s...
April 17, 2018: Biomacromolecules
https://www.readbyqxmd.com/read/29664607/polyserotonin-nanoparticles-as-multifunctional-materials-for-biomedical-applications
#7
Nako Nakatsuka, Mohammad Mahdi Hasani-Sadrabadi, Kevin M Cheung, Thomas D Young, Ghasem Bahlakeh, Alireza Moshaverinia, Paul S Weiss, Anne M Andrews
Serotonin-based nanoparticles represent a class of previously unexplored multifunctional nanoplatforms with potential biomedical applications. Serotonin, under basic conditions, self-assembles into monodisperse nanoparticles via autoxidation of serotonin monomers. To demonstrate potential applications of polyserotonin nanoparticles for cancer therapeutics, we show that these particles are biocompatible, exhibit photothermal effects when exposed to near-infrared radiation, and load the chemotherapeutic drug doxorubicin releasing it contextually and responsively in specific microenvironments...
April 17, 2018: ACS Nano
https://www.readbyqxmd.com/read/29664104/self-assembled-nanodiamond-supraparticles-for-anticancer-chemotherapy
#8
Yue Yu, Masahiro Nishikawa, Ming Liu, Takahiro Tei, Sunil C Kaul, Renu Wadhawa, Minfang Zhang, Junko Takahashi, Eijiro Miyako
A nanodiamond (ND) is a promising material for drug delivery applications owing to its relatively low cost, amenability to large-scale synthesis, unique structure, and low toxicity. However, synthesizing drug-loaded ND conjugates with uniform and tunable sizes, high loading capacity, efficacy in drug delivery, and versatility in terms of surface functionalization has been challenging. Here, we show that perfluorooctanoic acid-functionalized NDs spontaneously transform into well-dispersed and biocompatible supraparticle (SP) nanoclusters...
April 17, 2018: Nanoscale
https://www.readbyqxmd.com/read/29663927/encapsulation-of-5-flurouracil-into-plga-nanofibers-and-enhanced-anticancer-effect-in-combination-with-ajwa-dates-extract-phoenix-dactylifera-l
#9
Fazal Khan, Musab Aldhahri, Mohammad Asif Hussain, Kalamegam Gauthaman, Adnan Memic, Adel Abuzenadah, Taha Kumosani, Elie Barbour, Nazeeh Shuja Alothmany, Rabah Wasil Aldhaheri
Side effects connected with chemotherapeutic agents used in cancer treatment has led to alternative modalities of combinatorial therapies in an attempt to reduce the drug dosage and associated risks. In the current study we evaluated the potential use of Ajwa Dates Extract (ADE), reported to have anti-cancer effects, as an adjuvant therapy in combination with 5-flurouracil (5FU) against the human-breast-adenocarcinoma cell line (MFC-7) in vitro. The effects of ADE alone and in combination with 5-FU were evaluated in terms of cell viability and cytotoxicity...
March 1, 2018: Journal of Biomedical Nanotechnology
https://www.readbyqxmd.com/read/29663885/liposomes-as-a-promising-uultrasound-triggered-drug-delivery-system-in-cancer-treatment
#10
N M Salkho, R Z Turki, O Guessoum, A M Martins, R F Vitor, G A Husseini
The initial uses of ultrasound waves in the medical field were limited to the thermal ablation of solid tumors and as a diagnostic tool. Recent advances at the preclinical stage have allowed the use of ultrasound as a powerful tool to improve drug delivery when the agent is administered encapsulated inside a nanoparticle. This spatial and temporal control of drug release, using a non-invasive modality, is a promising approach to decrease the side effects of conventional chemotherapy in cancer treatments, as it reduces the interaction of the anti-neoplastic agent with healthy tissues...
April 15, 2018: Current Molecular Medicine
https://www.readbyqxmd.com/read/29663884/advances-in-tumor-targeted-liposomes
#11
A Jain, S K Jain
Cancer remains a deadly disease for effective treatment. Although anomalous tumor microenvironment is now widely exploited for targeted chemotherapy, safe and efficacious drug delivery to tumor cells is not still warranted. Liposomes are promising biodegradable and biocompatible nanocarriers having potential amenability for surface and internal modifications, and extraordinary capability to carry both hydrophilic as well as hydrophobhic drugs. Meticulous fabrication of liposomes with tumor selective ligand(s) and PEGylation reduces immunogenicity and increase target-specificity...
April 15, 2018: Current Molecular Medicine
https://www.readbyqxmd.com/read/29663383/nanoparticle-based-targeted-cancer-strategies-for-non-invasive-prostate-cancer-intervention
#12
REVIEW
Nicholas H Farina, Areg Zingiryan, Michael A Vrolijk, Scott D Perrapato, Steven Ades, Gary S Stein, Jane B Lian, Christopher C Landry
Prostate cancer is screened by testing circulating levels of the prostate-specific antigen (PSA) biomarker, monitoring changes over time, or a digital rectal exam. Abnormal results often lead to prostate biopsy. Prostate cancer positive patients are stratified into very low-risk, low-risk, intermediate-risk, and high-risk, based on clinical classification parameters, to assess therapy options. However, there remains a gap in our knowledge and a compelling need for improved risk stratification to inform clinical decisions and reduce both over-diagnosis and over-treatment...
April 16, 2018: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29662450/poly-ethylene-glycol-polylactide-micelles-for-cancer-therapy
#13
REVIEW
Jixue Wang, Shengxian Li, Yuping Han, Jingjing Guan, Shirley Chung, Chunxi Wang, Di Li
For the treatment of malignancy, many therapeutic agents, including small molecules, photosensitizers, immunomodulators, proteins and genes, and so forth, have been loaded into nanocarriers for controllable cancer therapy. Among these nanocarriers, polymeric micelles have been considered as one of the most promising nanocarriers, some of which have already been applied in different stages of clinical trials. The successful advantages of polymeric micelles from bench to bedside are due to their special core/shell structures, which can carry specific drugs in certain disease conditions...
2018: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29662187/designing-macrocyclic-disulfide-rich-peptides-for-biotechnological-applications
#14
REVIEW
Conan K Wang, David J Craik
Bioactive peptides have potential as drug leads, but turning them into drugs is a challenge because of their typically poor metabolic stability. Molecular grafting is one approach to stabilizing and constraining peptides and involves melding a bioactive peptide sequence onto a suitable molecular scaffold. This method has the benefit of improving the stability of the bioactive peptide lead and potentially expanding its functionality. Here we step through the molecular grafting process and describe its successes and limitations...
May 2018: Nature Chemical Biology
https://www.readbyqxmd.com/read/29662019/liposomal-drug-delivery-systems-and-anticancer-drugs
#15
REVIEW
Temidayo O B Olusanya, Rita Rushdi Haj Ahmad, Daniel M Ibegbu, James R Smith, Amal Ali Elkordy
Cancer is a life-threatening disease contributing to ~3.4 million deaths worldwide. There are various causes of cancer, such as smoking, being overweight or obese, intake of processed meat, radiation, family history, stress, environmental factors, and chance. The first-line treatment of cancer is the surgical removal of solid tumours, radiation therapy, and chemotherapy. The systemic administration of the free drug is considered to be the main clinical failure of chemotherapy in cancer treatment, as limited drug concentration reaches the tumour site...
April 14, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29661301/antifouling-zwitterionic-dextran-micelles-for-efficient-loading-dox
#16
Xiaotian Wu, Xiaofeng Chen, Peibo Hu, Minghong Hou, Yahao Dong, Yuping Wei
Polysaccharides derivatives are typical drug nanocarriers which are nontoxic and biodegradable. However, as is the case for all drug delivery systems, polysaccharides derivatives have to face the issue of protein fouling. In this paper, we present the design and synthesis of carboxybetaine-modified dextran-polycaprolactone (CB-Dex-PCL) copolymers as doxorubicin (DOX) nanocarriers. Results showed that DOX/CB-Dex-PCL micelles exhibited better cumulative release at the pH value of 5.2 than at the physiological pH of 7...
July 1, 2018: Carbohydrate Polymers
https://www.readbyqxmd.com/read/29660508/estrone-modified-ph-sensitive-glycol-chitosan-nanoparticles-for-drug-delivery-in-breast-cancer
#17
Huan Yang, Cui Tang, Chunhua Yin
Estrone-modified glycol chitosan nanoparticles (GCNP-ES) based on the mechanisms of ES-mediated endocytosis and intracellular pH-responsive drug release were developed for the treatment of breast cancer. GCNP-ES were prepared by grafting copolymerization of glycol chitosan with 2-(diisopropylamino)ethyl methacrylate to generate GCNP prior to ES conjugation. The particle size, zeta potential, and paclitaxel (PTX) encapsulation efficiency of GCNP-ES were characterized. In particular, GCNP-ES exhibited pH-responsive dissociation properties while maintaining stability under long-term storage and lyophilization...
April 13, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29660479/nanodiamond-applications-in-skin-preparations
#18
REVIEW
Roshanak Namdar, Shohreh Nafisi
The biocompatibility and nontoxicity of nanodiamonds (NDs) in combination with their excellent physical performance have rendered them attractive candidates for biomedical applications. NDs have great potential in drug nanoformulations because of their small size compared with other carbon nanomaterials. They are nontoxic with excellent adsorption properties and can be formulated into skin care products. Even though NDs have shown encouraging potential in skin preparations, only a few studies have reviewed their application in topical drug delivery systems...
April 13, 2018: Drug Discovery Today
https://www.readbyqxmd.com/read/29659317/multiple-response-optimization-of-processing-and-formulation-parameters-of-ph-sensitive-sustained-release-pellets-of-capecitabine-for-targeting-colon
#19
Sonia Pandey, Vijayendra Swamy, Arti Gupta, Akshay Koli, Swagat Patel, Furqan Maulvi, Bhavin Vyas
Purpose To optimize the Eudragit/Surelease® coated pH-sensitive pellets for controlled and target drug delivery to the colon tissue and to avoid frequent high dosing and associated side effects which restrict its use in the colorectal-cancer therapy. Methods The pellets were prepared using extrusion-spheronization technique. Box-Behnken and 32 full factorial designs were applied to optimize the process parameters [extruder sieve size, spheronizer-speed and spheronizer-time] and the coating levels [%w/v of Eudragit S100/Eudragit-L100 and Surelease® ] respectively, to achieve the smooth optimized size pellets with sustained drug delivery without prior drug release in upper gastrointestinal tract (GIT)...
April 16, 2018: Journal of Microencapsulation
https://www.readbyqxmd.com/read/29658806/nanobodies-and-cancer-current-status-and-new-perspectives
#20
Alessandro Allegra, Vanessa Innao, Demetrio Gerace, Doriana Vaddinelli, Andrea Gaetano Allegra, Caterina Musolino
Reducing the dimension of antigen-binding proteins to an only immunoglobulin domain has been one of the objectives of antibody manufacturing. Heavy chain antibodies were encountered while attempting to separate the blood serum proteins of dromedaries. Later the term "nanobodies" (Nbs) was introduced. The advantageous features of Nbs comprise little immunogenicity, stability at low/high pH, capacity to target antigens that are less antigenic, and, lastly, easy capability to be used for therapy against tumor cells...
April 16, 2018: Cancer Investigation
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