Macrophage-Derived Extracellular Vesicles as Drug Delivery Systems for Triple Negative Breast Cancer (TNBC) Therapy
AbstractEfficient targeted delivery of anticancer agents to TNBC cells remains one of the greatest challenges to developing therapies. The lack of tumor-specific markers, aggressive nature of the tumor, and unique propensity to recur and metastasize make TNBC tumors more difficult to treat than other subtypes. We propose to exploit natural ability of macrophages to target cancer cells by means of extracellular vesicles (EVs) as drug delivery vehicles for chemotherapeutic agents, paclitaxel (PTX) and doxorubicin (Dox). We demonstrated earlier that macrophage-derived EVs loaded with PTX (EV-PTX) and Dox (EV-Dox) target cancer cells and exhibited high anticancer efficacy in a mouse model of pulmonary metastases. Herein, we report a manufacture and characterization of novel EV-based drug formulations using different loading procedures that were optimized by varying pH, temperature, and sonication conditions. Selected EV-based formulations showed a high drug loading, efficient accumulation in TNBC cells in vitro, and pronounced anti-proliferation effect. Drug-loaded EVs target TNBC in vivo, including the orthotopic mouse T11 tumors in immune competent BALB/C mice, and human MDA-MB-231 tumors in athymic nu/nu mice, and abolished tumor growth. Overall, EV-based formulations can provide a novel solution to a currently unmet clinical need and reduce the morbidity and mortality of TNBC patients.Graphical AbstractMacrophage-derived extracellular vesicles (EVs) for targeted drug delivery...
In conclusion, the addition of PPIs to the treatment regimen of breast cancer appears to be a promising strategy to potentiate the efficacy of chemotherapy and may suppress cancer metastasis. PMID: 31955147 [PubMed - in process]
Abstract A series of nine new 2,3-disubstituted 4(3H)-quinazolin-4-one derivatives was furnished starting from the 2-propyl-4(3H)-quinazo-line-4-one (2). The reinvestigation of the key starting quinazolinone 2 was performed under microwave irradiation (MW) and solvent-free conditions. Combination of MW and phase-transfer catalysis using tetrabutylammonium benzoate (TBAB) as a novel neutral ionic catalyst was used for carrying out N-alkylation and condensation reactions of compound 2 as a simple, efficient and eco-friendly technique. The structure of the synthesized compounds was elucidated using different spectral...
Cancer Research UK scientists working in Cambridge made a vital energy-producing chemical magnetic and used MRI scans to watch how quickly breast cancer cells used it up.
I am currently in my senior year of undergrad, and i honestly don't know what my chances of getting into a mid-tier medical school is since my scores are kinda low average. I personally feel i am a little different because im ADHD and Dyslexic and coupled with my experience as a whole. Currently, i have a 3.4 overall GPA scored a 505 on the MCAT The second author on Triple-negative Metaplastic Breast Cancer research paper. I work full time as a Regional Representative for a hemp company... WAMC since i am out the ordinary case
Breast cancer progression can vary significantly between patients. Even within the same tumor, different areas may be composed of different types of cells and characterized by different tumor structures. This heterogeneity makes it challenging to ascertain the severity of a tumor and assess its molecular subtype, thereby affecting the precision of diagnosis and the choice of the most effective treatment approach.
(Cancer Research UK) A new type of scan that involves magnetizing molecules allows doctors to see in real-time which regions of a breast tumor are active, according to research funded by Cancer Research UK and published in Proceedings of the National Academy of Sciences today. This is the first time researchers have demonstrated that this scanning technique, called carbon-13 hyperpolarized imaging, can be used to monitor breast cancer.
(University of Zurich) An imaging approach developed at UZH enables the study of breast cancer tissue in greater detail. It uses 35 biomarkers to identify the different cell types in breast tumors and its surrounding area compared to the current standard of testing single markers. This increases the precision of tumor analysis and classification - and improves personalized diagnostics for breast cancer patients.