J Periodontol:牙龈卟啉单胞菌脂多糖对非酒精性脂肪肝的影响

2018-09-25 MedSci MedSci原创

非酒精性脂肪肝(NASH)是可发展成肝硬化的慢性肝病之一。本研究的目的是研究牙龈卟啉单胞菌脂多糖(LPS)对NASH发病的影响,并确定在牙龈卟啉单胞菌中生物合成的双放射性标记LPS(R-LPS)的生物分布。

非酒精性脂肪肝(NASH)是可发展成肝硬化的慢性肝病之一。本研究的目的是研究牙龈卟啉单胞菌脂多糖(LPS)对NASH发病的影响,并确定在牙龈卟啉单胞菌中生物合成的双放射性标记LPS(R-LPS)的生物分布。

方法:将喂食基础饮食(BD)或高脂肪饮食(HD)的大鼠用牙龈卟啉单胞菌-LPS或R-LPS注射到右侧上颌第一磨牙腭侧的牙龈中,并分为以下4组:BD / LPS( - ),BD / LPS(+),HD / LPS( - )和HD / LPS(+)或2组:BD / R-LPS和HD / R-LPS。

结果:LPS(+)组的牙龈炎进展明显快于LPS( - )组。此外,在HD / LPS(+)组中,肝脏组织学分析证实存在NASH,其特征为大的脂肪滴,气球样变性和炎性细胞的浸润。当3H,14C-R-LPS注入腭龈时,HD / R-LPS大鼠右侧腭粘膜的放射性与其他区域相比最高,24小时后与BD / R-LPS相比显着升高老鼠。上颌骨的放射自显影分析显示从腭粘膜到硬腭和牙间区域的分布。即使在24小时后,BD / R-LPS和HD / R-LPS大鼠的器官中的放射性大多定位于肝脏。

本研究表明,牙龈卟啉单胞菌-LPS从口腔向肝脏的转移在NASH的疾病恶化中起重要作用。

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    2019-01-05 feather89
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    2018-09-25 1e1b8538m79(暂无匿称)

    不错的文章值得我有

    0

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    2018-09-25 医者仁心5538

    学习了

    0

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牙龈卟啉单胞菌是口腔疾病,如牙周炎和种植体周围炎的主要病原体。这些疾病的治疗通常需要对植体表面进行机械清创,然后应用抗菌剂或抗生素。抗生素使用的局限性以及带来的日益增长的全球抗生素耐药性问题,迫使人们寻找替代药物。在这项研究中,研究人员测试了AM404(一种扑热息痛的活性代谢产物)对牙龈卟啉单胞菌和其他细菌病原体的抗菌和抗菌膜特性。测试了AM404对10种细菌的活性,包括口腔和非口腔人类病原体。通

J Periodontal Res: :牙周膜细胞在牙龈卟啉单胞菌脂多糖刺激下内毒素耐受性的变化

内毒素耐受性即低浓度的脂质多糖(LPS)对抗内毒素后的低反应性状态。本实验旨在研究牙龈卟啉单胞菌预处理是否导致内毒素耐受诱导和人牙周膜细胞(hPDLCs)中Toll样受体(TLR)-2和-4诱导反应的改变。

J Contemp Dent Pract:罗勒圣地可有效对抗牙周致病菌

本研究旨在评价罗勒圣地(tulsi)提取物对伴放线菌和牙龈卟啉单胞菌的抗菌活性。在目前的体外研究中采用冷提取法制备tulsi提取物。然后通过用二甲基甲酰胺稀释获得各种浓度(2,4,6和8%)的tulsi提取物。0.2%氯己定用作阳性对照,而阴性对照用二甲基甲酰胺。测量对伴放线聚集杆菌及牙龈卟啉单胞菌的抑制效果。为了在组内和研究组之间进行比较,使用了单因素方差分析(ANOVA)和Tukey事后检验。

J Clin Periodontol: 牙龈卟啉单胞菌LPs和Lr 12肽对单核细胞Trem-1表达的影响

牙周病涉及宿主免疫应答的激活,不仅作为牙周组织抗细菌攻击的防御者,而且作为组织破坏的介质。髓系细胞上表达的触发受体1(TREM-1)是一种免疫受体,与Toll样受体协同增强微生物分子介导的炎症反应。本实验旨在研究牙龈卟啉单胞菌脂多糖(LPS)的作用以及TR12-1抑制肽LR12对人原代单核细胞上膜结合和可溶形式TREM-1表达的影响,以及促炎细胞因子的产生。

J Clin Periodontol: 牙周炎患者牙龈卟啉单胞菌的野生型分离物对血小板活化的影响

体外研究显示牙龈卟啉单胞菌(Pg)是一种与牙周炎发病和进展密切相关的病原体,能够激活血小板,从而将牙周炎症与血管健康危害联系起来。

Microb Pathog:丁子香酚和丁香叶精油可有效对抗牙周致病菌

本研究旨在探究丁香叶精油(CLEO)及丁子香酚对口腔厌氧菌牙龈卟啉单胞菌的抑菌作用及机制。结果表明,丁香酚在CLEO中含量为90.84%,在31.25μM浓度时对牙龈卟啉单胞菌具有抗菌活性。扫描电子显微镜(SEM)观察发现,丁子香酚可引起细胞收缩和裂解。大分子的释放和荧光染料的摄取表明,丁子香酚科室细胞膜透化并且不可逆地破坏血浆膜完整性的能力来发挥抗菌活性。此外,丁子香酚抑制生物膜形成并降低不同浓