Chemotherapy use against solid tumours often results in the resistance of the cancer cells to the molecule used. In this paper, we will set up and analyse an ODE model for heterogeneous in vitro tumours, consisting of cells that are sensitive or resistant to a certain drug. We will then use this model to develop different protocols, that aim at reducing the tumour volume while preserving its heterogeneity. These drug administration schedules are determined through analysis of the system dynamics, and optimal control theory.
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http://dx.doi.org/10.1016/j.jtbi.2016.11.009 | DOI Listing |
Nat Prod Res
January 2025
Department of School of Pharmaceutical Sciences, Changchun University of Chinese Medicine, Changchun, China.
To explore the antioxidant activity of enzymatic hydrolysates of from Dalian and preliminarily elucidate their mechanisms of action both and . Samples were hydrolysed using alcalase, protamex, and neutrase. 2,2-diphenyl-1-(2,4,6-trinitrophenyl)hydrazyl (DPPH) and 2,2'-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid (ABTS) radical scavenging assays showed that the alcalase hydrolysate had the highest antioxidant activity, with IC values of 4.
View Article and Find Full Text PDFStem Cell Rev Rep
January 2025
Dipartimento di Medicina Sperimentale, Università di Genova, Viale Benedetto XV, 3, Genova, 16132, Italy.
Progress of human brain in vitro models stands as a keystone in neurological and psychiatric research, addressing the limitations posed by species-specific differences in animal models. The generation of human neurons from induced pluripotent stem cells (iPSCs) using transcription factor reprogramming protocols has been shown to reduce heterogeneity and improve consistency across different stem cell lines. Despite notable advancements, the current protocols still exhibit several shortcomings.
View Article and Find Full Text PDFChemSusChem
January 2025
IIT Bombay, Dept of Metallurgical Engineering and Materials Science, IIT Bombay, 400076, Mumbai, INDIA.
Multi-domain biological and environmental research highlights the efficacy of carbon quantum dots (CQDs) as asafer alternative to toxic metal-based quantum dots (QDs) and expensive conventional organic dyes, particularly in biomedical applications. CQDs are often functionalized by metal heteroatoms to improve their electron-donating properties and modify charge density, thereby enhancingtheir physicochemical characteristics. However, metal doping may re-introduce toxicity concerns as in traditional QDs and further increase environmental risks.
View Article and Find Full Text PDFAdv Sci (Weinh)
January 2025
Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing Key Laboratory of Ophthalmology & Visual Sciences, Beijing, 100730, China.
Meibomian gland dysfunction (MGD) is a leading cause of evaporative dry eye disease, presenting a challenge for targeted treatment. Traditional topical ocular drug delivery methods often fail to effectively reach the meibomian glands (MGs). To address this, the study has developed a soluble microneedles (MN) patch comprising poly(vinyl alcohol), cyclodextrin modified polyacrylic acid, and new indocyanine green.
View Article and Find Full Text PDFAdv Healthc Mater
January 2025
Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China.
Platelet-rich plasma (PRP) is characterized by elevated concentrations of growth factors that facilitate bone repair. Nonetheless, the effective integration of PRP with bone implants and the sustained release of its active constituents pose significant challenges. In this study, thrombin is grafted onto the surface of polyetheretherketone (PEEK) via an N,N'-Disuccinimidyl Carbonate (DSC) linker and the retained enzymatic activity of thrombin enables the controlled activation of PRP self-assembly, resulting in the formation of a functional bio-gel layer.
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