Background: Dysregulation of HSP90 gene expression is known to take place in breast cancer. Here we used D,L-lactic-co-glycolic acid-polyethylene glycol-17-dimethylaminoethylamino-17-demethoxy geldanamycin (PLGA-PEG-17DMAG) complexes and free 17-DMAG to inhibit the expression of HSP90 gene in the T47D breast cancer cell line. The purpose was to determine whether nanoencapsulating 17DMAG improves the anti-cancer effects as compared to free 17DMAG.
Materials And Methods: The T47D breast cancer cell line was grown in RPMI 1640 supplemented with 10% FBS. Encapsulation of 17DMAG was conducted through a double emulsion method and properties of copolymers were characterized by Fourier transform infrared spectroscopy and H nuclear magnetic resonance spectroscopy. Assessment of drug cytotoxicity was by MTT assay. After treatment of T47D cells with a given amount of drug, RNA was extracted and cDNA was synthesized. In order to assess HSP90 gene expression, real-time PCR was performed.
Results: Taking into account drug load, IC50 was significant decreased in nanocapsulated 17DMAG in comparison with free 17DMAG. This finding was associated with decrease of HSP90 gene expression.
Conclusions: PLGA-PEG-17DMAG complexes can be more effective than free 17DMAG in down-regulating of HSP90 expression, at the saesm time exerting more potent cytotoxic effects. Therefore, PLGA-PEG could be a superior carrier for this type of hydrophobic agent.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
[Mechanism of Colquhounia Root Tablets in inhibiting osteoclast differentiation based on HSP90 target modulation].
Zhongguo Zhong Yao Za Zhi
December 2024
Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences Beijing 100700, China.
This study aimed to investigate the potential role of Colquhounia Root Tablets against bone destruction in rheumatoid arthritis(RA) and its molecular mechanism. The study used ultra-performance liquid chromatography-mass spectrometry to analyze the major components of Colquhounia Root Tablets and predicted its candidate target gene set based on the major components. The key targets of RA bone destruction were obtained through GeneCards and the Database of Genetics and Medical Literature(OMIM), protein-protein interaction(PPI) network was constructed, and the key targets were identified by topological analysis.
View Article and Find Full Text PDFCombination of dapagliflozin and pioglitazone lacks superiority against monotherapy in streptozotocin-induced nephropathy.
Sci Rep
January 2025
Faculty of Pharmacy, Department of Pharmacology and Toxicology, Comenius University Bratislava, SK-83232, Bratislava, Slovakia.
Oxidative stress and apoptosis are highly engaged in development of diabetic nephropathy (DN). In monotherapy, dapagliflozin and pioglitazone positively modulate target organ damage even independently of their hypoglycaemic effect. This study evaluated whether a simultaneous PPARγ activation and SGLT cotransporter inhibition offer superior protection against DN-related oxidative and apoptotic processes in a T1DM rat model.
View Article and Find Full Text PDFGenes of filter-feeding species as a potential toolkit for monitoring microplastic impacts.
Aquat Toxicol
January 2025
Department of Functional Biology, Faculty of Medicine, University of Oviedo. C/ Julian Clavería s/n 33006 Oviedo, Spain.
Article Synopsis
- Microplastics (MPs) are pervasive in marine environments and their effects on wildlife are not fully understood, necessitating better monitoring methods.
- The study introduces a new toolkit to track gene expression changes in filter-feeding species, highlighting key genes like HSP70 and SOD that indicate stress responses to MPs.
- This innovative approach allows for a more nuanced understanding of MPs' impact compared to traditional methods, providing insights into pollution and facilitating long-term ecological monitoring.
Dual targeting of HSP90 and BCL-2 in breast cancer cells using inhibitors BIIB021 and ABT-263.
Breast Cancer Res Treat
January 2025
Rafet Kayış Faculty of Engineering, Department of Genetics and Bioengineering, Alanya Alaaddin Keykubat University, Antalya, Turkey.
Purpose: The incidence of breast cancer has been increasing in recent years, and monotherapy approaches are not sufficient alone in the treatment of breast cancer. In the combined therapy approach, combining two or three different agents in lower doses can mitigate the side effects on living cells and tissues caused by high doses of chemical agents used alone. ABT-263 (navitoclax), a clinically tested Bcl-2 family protein inhibitor, has shown limited success in clinical trials due to the development of resistance to monotherapy in breast cancer cells.
View Article and Find Full Text PDFTemperature-dependent toxicity and mechanisms of florfenicol on the embryonic development of marine medaka (Oryzias melastigma).
Ecotoxicol Environ Saf
January 2025
Guangdong Provincial Key Laboratory of Marine Disaster Prediction and Prevention, Shantou University, Shantou 515063, China; Guangdong Engineering Technology Research Center of Offshore Environmental Pollution Control, Shantou University, Shantou 515063, China. Electronic address:
The extensive use of antibiotics and their persistence in the environment have seriously threatened marine ecosystems in recent years. The frequent occurrence of extreme weather due to climate change has also increased the uncertainty of effective toxicity identification and risk assessment of the chemicals of concern. This study aimed to investigate the toxic effects and potential mechanisms of florfenicol (0.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!