The expression levels of Toll-like receptors after metallic particle and ion exposition in the synovium of a murine model

To date, the exact role of specific Toll-like receptors (TLRs) in regulating immune reactivity to metallic byproducts of orthopedic implants has not been fully clarified. In light of the situation, our objective in this investigation was to assess the expression levels of surface TLRs after metallic...

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Hauptverfasser: Cheng, Xiangyun (VerfasserIn) , Jansson, Volkmar (VerfasserIn) , Kretzer, Jan Philippe (VerfasserIn) , Bader, Rainer (VerfasserIn) , Utzschneider, Sandra (VerfasserIn) , Paulus, Alexander C. (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 7 August 2021
In: Journal of Clinical Medicine
Year: 2021, Jahrgang: 10, Heft: 16, Pages: 1-14
ISSN:2077-0383
DOI:10.3390/jcm10163489
Online-Zugang:Verlag, Volltext: https://doi.org/10.3390/jcm10163489
Verlag: https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=DynamicDOIArticle&SrcApp=WOS&KeyAID=10.3390%2Fjcm10163489&DestApp=DOI&SrcAppSID=D2LojIfiDSePqaUiPSY&SrcJTitle=JOURNAL+OF+CLINICAL+MEDICINE&DestDOIRegistrantName=MDPI+AG
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Verfasserangaben:Xiangyun Cheng, Volkmar Jansson, Jan Philippe Kretzer, Rainer Bader, Sandra Utzschneider and Alexander C. Paulus

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520 |a To date, the exact role of specific Toll-like receptors (TLRs) in regulating immune reactivity to metallic byproducts of orthopedic implants has not been fully clarified. In light of the situation, our objective in this investigation was to assess the expression levels of surface TLRs after metallic particle and ion exposure in an established animal model. Ten female BALB/c mice in each group received intra-articular injections of phosphate buffer (PBS) (control), metallic particles (MP), and metallic ions (MI), respectively. Seven days later, immunohistochemical staining was undertaken in the synovial layer of the murine knee joints using anti-TLR 1, 2, 4, 5, and 6 polyclonal antibodies. In addition to increased cellular infiltrates and a hyperplastic synovial membrane, the MP group showed significantly elevated TLR expression compared to the control group and had higher TLR 1-, 4-, and 6-positive cells than the MI group (p < 0.0167). TLR 4- and TLR 6-positive cells were significantly augmented for the MI group compared to the control group (p < 0.0167). Additionally, greenish corrosion particles found in the necrotic tissue suggested that metallic particles might release a certain level of locally toxic metallic ions in vivo. 
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