A pH-sensitive drug delivery system based on folic acid-targeted HBP-modified mesoporous silica nanoparticles for cancer therapy

Publication date: Available online 25 January 2020Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Yan Li, Shuai Wang, Fang Xiang Song, Li Zhang, Wei Yang, Hong Xia Wang, Qian Lin ChenAbstractMesoporous silica nanoparticles with folic acid (MSN-COOH-Tet-HBP-FA) are able to mediate targeting and have a pH stimulation response character, and therefore have been successfully synthesized as vectors for antitumor drug delivery. The model drug is tetrandrine (Tet). The chemical structure and properties of these NPs were characterized through systematic characterization analyses. Their drug loading capacity was significantly improved through carboxy modification (26.86 % in max), and they exhibited pH-dependent drug release profiles("zero pre-release" within 20 hours in a normal physiological environment). In vitro cytotoxicity and cell uptake of the as-synthesized NPs in Hela and A549 cells were also evaluated, and exhibited high cytotoxicity and cell-targeted uptake capacity. It was concluded that MSN-COOH-Tet-HBP-FA could be used as a promising drug delivery system for cancer therapy.Graphical AbstractMesoporous silica nanoparticles with folic acid (MSN-COOH-Tet-HBP-FA) are able to mediate targeting and have a pH stimulation response character, and therefore have been successfully synthesized as vectors for antitumor drug delivery. The model drug is tetrandrine (Tet). The chemical structure and properties of these NPs were charac...
Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Category: Chemistry Source Type: research

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Publication date: Available online 26 February 2020Source: Pharmacology &TherapeuticsAuthor(s): Lukas Gorecki, Martin Andrs, Martina Rezacova, Jan Korabecny
Source: Pharmacology and Therapeutics - Category: Drugs & Pharmacology Source Type: research
Authors: Liu X, Dong C, Ma S, Wang Y, Lin T, Li Y, Yang S, Zhang W, Zhang R, Zhao G Abstract Although microRNAs (miRNAs)-based cancer therapy strategies have been proved to be efficient and superior to chemotherapeutic agents in certain extent, the unstable properties of miRNAs significantly impaired the wide application. Therefore, how to safely deliver the miRNAs to the targeted site of action is the most pivotal step to achieve the ideal treatment effect. In the present work, the miR-128-3p, which is able of inducing chromosomal instability, was loaded into the nanocomplexes developed by the PEG-PDMAEMA (PDMAEMA...
Source: Drug Delivery - Category: Drugs & Pharmacology Tags: Drug Deliv Source Type: research
In this study, a pH-responsive micelle was designed utilizing the pH-sensitivity of borate bonds formed between dopamine and boronic acid. First, methyl (polyethylene glycol)-block-polycaprolactone (mPEG-PCL) was conjugated with 4-cyano-4-(thiobenzoylthio)pentanoic acid (CTP) to obtain a macroinitiator. Two different segments poly(dopamine methacrylamide) (PDMA) and poly(vinylphenylboronic acid) (PVBA) were then grafted to the end of mPEG-PCL. Two triblock copolymers, mPEG-PCL-PDMA and mPEG-PCL-PVBA, were then obtained by reversible addition-fragmentation transfer (RAFT) polymerization. These copolymers and their mixture s...
Source: Drug Delivery - Category: Drugs & Pharmacology Tags: Drug Deliv Source Type: research
Lantheus Medical Imaging parent Lantheus Holdings has reported growth in 2019...Read more on AuntMinnie.comRelated Reading: Lantheus touts new study on contrast echocardiography Lantheus appoints new CCO Lantheus hires former Bayer director as new CMO Lantheus, CarThera partner on ultrasound cancer therapy Lantheus posts lower Q3 results
Source: AuntMinnie.com Headlines - Category: Radiology Source Type: news
The extracellular matrix (ECM) is a complex network of secreted proteins which provides support for tissues and organs. Additionally, the ECM controls a plethora of cell functions, including cell polarity, migration, proliferation, and oncogenic transformation. One of the hallmarks of cancer is altered cell metabolism, which is currently being exploited to develop anti-cancer therapies. Several pieces of evidence indicate that the tumor microenvironment and the ECM impinge on tumor cell metabolism. Therefore, it is essential to understand the contribution of the complex 3D microenvironment in controlling metabolic plastici...
Source: Frontiers in Oncology - Category: Cancer & Oncology Source Type: research
Szpakowska M Abstract Chemokines regulate directed cell migration, proliferation and survival and are key components in cancer biology. They exert their functions by interacting with seven-transmembrane domain receptors that signal through G proteins (GPCRs). A subgroup of four chemokine receptors known as the atypical chemokine receptors (ACKRs) has emerged as essential regulators of the chemokine functions. ACKRs play diverse and complex roles in tumor biology from tumor initiation to metastasis, including cancer cell proliferation, adherence to endothelium, epithelial-mesenchymal transition (EMT), extravasatio...
Source: Advances in Cancer Research - Category: Cancer & Oncology Authors: Tags: Adv Cancer Res Source Type: research
Abstract As basic research into GPCR signaling and its association with disease has come into fruition, greater clarity has emerged with regards to how these receptors may be amenable to therapeutic intervention. As a diverse group of receptor proteins, which regulate a variety of intracellular signaling pathways, research in this area has been slow to yield tangible therapeutic agents for the treatment of a number of diseases including cancer. However, recently such research has gained momentum based on a series of studies that have sought to define GPCR proteins dynamics through the elucidation of their crystal ...
Source: Advances in Cancer Research - Category: Cancer & Oncology Authors: Tags: Adv Cancer Res Source Type: research
Lantheus Medical Imaging parent Lantheus Holdings has reported growth in 2019...Read more on AuntMinnie.comRelated Reading: Lantheus touts new study on contrast echocardiography Lantheus appoints new CCO Lantheus hires former Bayer director as new CMO Lantheus, CarThera partner on ultrasound cancer therapy Lantheus posts lower Q3 results
Source: AuntMinnie.com Headlines - Category: Radiology Source Type: news
AbstractBreast cancer (BC) is the most common malignancy in women with a significant increasing incidence during the reproductive life. However, based on the newest anti-cancer molecular targeting drugs, successful treatments lead to the disease healing particularly in young patients, thus refreshing their motherhood programs. However, as effect of the BC treatment, a premature depletion of the ovarian follicle reserve occurs in more than one-third of patients resulting in permanent infertility. To prevent the cancer treatment-related infertility (CTRI), several options are today utilized. Besides the ovary suppression by ...
Source: Journal of Cancer Research and Clinical Oncology - Category: Cancer & Oncology Source Type: research
In this study, we first evaluated the expression and prognostic values of sirtuins in multiple cancer cohorts using publicly available TCGA pan-cancer datasets. Pan-cancer survival analysis indicated that 6 out of 7 sirtuin family members were significant associated with prognosis of clear cell renal cell carcinoma (KIRC) patients. SIRT1, SIRT3, SIRT4, and SIRT5 were associated with favorable prognosis of KIRC patients, while SIRT6 and SIRT7 were associated with unfavorable prognosis. The expression levels of SIRT4 and SIRT5 in KIRC tissues were lower than that in normal tissues, while SIRT6 and SIRT7 were higher in KIRC t...
Source: Frontiers in Oncology - Category: Cancer & Oncology Source Type: research
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