1,721,011 research outputs found
Gold Nanoparticles Contact with Cancer Cell: A Brief Update
No full textThe fine-tuning of the physicochemical properties of gold nanoparticles has facilitated the rapid development of multifunctional gold-based nanomaterials with diagnostic, therapeutic, and therapeutic applications. Work on gold nanoparticles is increasingly focusing on their cancer application. This review provides a summary of the main biological effects exerted by gold nanoparticles on cancer cells and highlights some critical factors involved in the interaction process (protein corona, tumor microenvironment, surface functionalization). The review also contains a brief discussion of the application of gold nanoparticles in target discovery
Can Nanotechnology Shine a New Light on Antimicrobial Photodynamic Therapies?
No full textPhotomedicine is one of the most inspiring and interdisciplinary fields in medicine that involves the research and application of photobiology with respect to health and disease. Photomedicine has contributed to the clinical practice of a variety of medical fields, including dermatology, surgery, radiology, diagnostics, cardiology, and anticancer therapy. Furthermore, expansion of its scope and contribution can be expected. This book covers a wide range of aspects and issues related to photomedicine, which brings together researchers from many countries. These include the basic science of photodynamic therapy, clinical applications in various kinds of medical fields, photochemotherapy, laser therapy for musculoskeletal pain, intense pulsed light therapy for photorejuvenation, biological function of low-level laser therapy, and photobiology for skin rejuvenation. Not only will this be beneficial for readers, but it will also contribute to scientists making further breakthroughs in photomedicine
In vitro increase of mineralized extracellular matrix deposition by SAOS-2 cells onto 3D titanium scaffolds bioactive glass-coated by RF magnetron sputtering
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The effect of low-level laser irradiation on human osteoblast-like cells growth: an in vitro analysis
No full textGrowing Role of 3D In Vitro Cell Cultures in the Study of Cellular and Molecular Mechanisms: Short Focus on Breast Cancer, Endometriosis, Liver and Infectious Diseases
Full text linkOver the past decade, the development of three-dimensional (3D) models has increased exponentially, facilitating the unravelling of fundamental and essential cellular mechanisms by which cells communicate with each other, assemble into tissues and organs and respond to biochemical and biophysical stimuli under both physiological and pathological conditions. This section presents a concise overview of the most recent updates on the significant contribution of different types of 3D cell cultures including spheroids, organoids and organ-on-chip and bio-printed tissues in advancing our understanding of cellular and molecular mechanisms. The case studies presented include the 3D cultures of breast cancer (BC), endometriosis, the liver microenvironment and infections. In BC, the establishment of 3D culture models has permitted the visualization of the role of cancer-associated fibroblasts in the delivery of exosomes, as well as the significance of the physical properties of the extracellular matrix in promoting cell proliferation and invasion. This approach has also become a valuable tool in gaining insight into general and specific mechanisms of drug resistance. Given the considerable heterogeneity of endometriosis, 3D models offer a more accurate representation of the in vivo microenvironment, thereby facilitating the identification and translation of novel targeted therapeutic strategies. The advantages provided by 3D models of the hepatic environment, in conjunction with the high throughput characterizing various platforms, have enabled the elucidation of complex molecular mechanisms underlying various threatening hepatic diseases. A limited number of 3D models for gut and skin infections have been developed. However, a more profound comprehension of the spatial and temporal interactions between microbes, the host and their environment may facilitate the advancement of in vitro, ex vivo and in vivo disease models. Additionally, it may pave the way for the development of novel therapeutic approaches in diverse research fields. The interested reader will also find concluding remarks on the challenges and prospects of using 3D cell cultures for discovering cellular and molecular mechanisms in the research areas covered in this review
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
In Vitro Osteogenesis Of Human Stem Cells by using a Three-Dimensional Perfusion Bioreactor Culture System: a review.
Full text linkTissue engineering (by culturing cells on appropriate scaffolds, and using bioreactors to drive the correct bone structure formation) is an attractive alternative to bone grafting or implantation of bone substitutes. Osteogenesis is a biological process that involves many molecular intracellular pathways organized to optimize bone modeling. The use of bioreactor systems and especially the perfusion bioreactor, provides both the technological means to reveal fundamental mechanisms of cell function in a 3D environment, and the potential to improve the quality of engineered tissues. In this mini-review all the characteristics for the production of an appropriate bone construct are analyzed: the stem cell source, scaffolds useful for the seeding of pre-osteoblastic cells and the effects of fluid flow on differentiation and proliferation of bone precursor cells. By automating and standardizing tissue manufacture in controlled closed systems, engineered tissues may reduce the gap between the process of bone formation in vitro and subsequent graft of bone substitutes in vivo
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