The effect of polyethylene particle chemistry on human monocyte-macrophage function in vitro.
نویسندگان
چکیده
Osteolysis remains the most important problem in orthopedic implant failure. Wear debris from the implant contains polyethylene (PE) particulate which has been shown to activate monocyte-derived macrophages (MDM). Although the response of MDM has been shown to be influenced by the size, shape, and chemical type of PE, the effect of chemically altered PE on MDM has not been studied. In this study, human MDM were seeded onto glass coverslips coated with virgin high density (HD)PE and chemically modified HDPE (impregnated with ppm levels of CoCl(2) and oxidized by heat) mixed with type I collagen and cultured for 96 h. Light microscopic evaluation demonstrated consistent phagocytosis of the HDPE particulate that was confirmed by scanning electron and transmission electron microscopy with little evidence of cytotoxicity. Evaluation of pro-inflammatory mediator secretion by MDMs in response to the virgin and chemically modified HDPE revealed significant differences in interleukin (IL)-1, tumor necrosis factor (TNF)-alpha, and IL-6 secretion. A significant elevation of IL-1 secretion was observed after initial exposure to virgin HDPE particles compared with controls (p = 0.001). IL-1 secretion was also elevated in the low oxidized particle groups (p = 0.001), whereas the highly oxidized particles were not different than controls. Secretion of both IL-6 (p = 0.03) and TNF-alpha (p = 0.007) were significantly elevated by the low oxidized HDPE particles whereas the virgin and highly oxidized groups showed no difference. The different effects on MDM activation when HDPE surface chemistry was altered, highlight the importance of defining the particle properties when studying the role of MDM activation in in vitro systems and extrapolating these observations to the in vivo situation.
منابع مشابه
In-vitro Transcribed mRNA Delivery Using PLGA/PEI Nanoparticles into Human Monocyte-derived Dendritic Cells
Induction of protein synthesis by the external delivery of in-vitro transcription-messenger RNA (IVT-mRNA) has been a useful approach in the realm of cell biology, disease treatment, reprogramming of cells, and vaccine design. Therefore, the development of new formulations for protection of mRNA against nucleases is required to maintain its activity in-vivo. It was the aim o...
متن کاملIn-vitro Transcribed mRNA Delivery Using PLGA/PEI Nanoparticles into Human Monocyte-derived Dendritic Cells
Induction of protein synthesis by the external delivery of in-vitro transcription-messenger RNA (IVT-mRNA) has been a useful approach in the realm of cell biology, disease treatment, reprogramming of cells, and vaccine design. Therefore, the development of new formulations for protection of mRNA against nucleases is required to maintain its activity in-vivo. It was the aim o...
متن کاملThe Effect of Polyethylene Glycol and Nanoclay on the Rheological Behavior of Dispersing Cationic Polyurethane Nanocomposites
Cationic waterborne polyurethane as a new dispersing polymer was synthesized by using relatively hydrophilic polyols. Dispersing cationic polyurethane (DCPU) nanocomposites were prepared using isophorone diisocyanate (IPDI), polyethylene glycol (PEG) with different molecular weights (Mn=200, 400, 600,and1000 g/mol), N-methyl diethanolamine (MDEA), dibutyltin dilaurate (DBTDL) and different perc...
متن کاملDifferentiation and Apoptosis of U937 Leukemia Cells by an Active Compound from Dendrostellera lessertii
Background: Regarding the strong differentiation and anti-leukemic activity of Dendrostellera lessertii extract, an active agent with similar capabilities was isolated from the crude extract of the plant leaves. The aim of this study was to determine whether the anti-proliferative effect observed for this compound, is differentiation-dependent among the drug-treated cells, using U937 cells. Me...
متن کاملApoptotic effect of morphine, imiquimod and nalmefene on promastigote , infected and uninfected macrophages with amastigote of Leishmania major by flow cytometry
The parasites of genus Leishmania are the causative agents of one of the most widespread and devastating diseases. According to follow-up data, these medications may provoke adverse drug reactions, drug resistance, relapse as well as financial burden. The mechanism of action of opioid drugs are primarily exerted via transmembrane G-protein coupled receptors. One of the potent synthetic immunomo...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Journal of biomedical materials research
دوره 52 2 شماره
صفحات -
تاریخ انتشار 2000