Periodontitis is a highly prevalent,chronic,non-specific,and immunologically devastating disease of periodontal tissues,caused by microbial infection.This study aims to examine the efficacy and protective mechanism of...Periodontitis is a highly prevalent,chronic,non-specific,and immunologically devastating disease of periodontal tissues,caused by microbial infection.This study aims to examine the efficacy and protective mechanism of triclosan(TCS),a bisphenolic,non-cationic component of oral care products,against periodontal inflammation induced by lipopolysaccharide purified from Porphyromonas gingivalis(LPS-PG).TCS markedly downregulated interleukin-6(IL-6),IL-8,and IL-15 in human periodontal ligament fibroblasts(HPDLFs)treated with LPS-PG.By using a liquid chromatography-tandem mass spectrometry(LC-MS/MS)approach,318 differentially expressed proteins(161 upregulated and 157 downregulated)were identified in TCS-pretreated HPDLFs.TCS upregulated HSPA5 and HSP90B1 but downregulated HSPA2.Besides,TCS upregulated miR-548i in HPDLFs,which downregulated IL-15.These results indicate that TCS attenuates the activation of HPDLFs and downregulates the inflammatory cytokines through various mechanisms,thus highlighting its protective role in periodontal inflammation.展开更多
Objective To evaluate the effects of transforming growth factor β(TGF-β) and recombinant human bone morphogenetic protein 2 (rhBMP2) on human periodontal ligament fibroblasts (HPDLFs). Methods HPDLFs were done prima...Objective To evaluate the effects of transforming growth factor β(TGF-β) and recombinant human bone morphogenetic protein 2 (rhBMP2) on human periodontal ligament fibroblasts (HPDLFs). Methods HPDLFs were done primary culture to detect the distinct concentrations of TGF-P and rhBMF2 on its proliferation, alkaline phosphatase (ALP) activity, osteocalcin (OC) synthesis and formation of the minerali-zed nodules, respectively. Results TGF-β (5～100ng/ml) significantly stimulated the proliferation of HPDLFs. The ALP activity of HPDLFs was evaluated evidently by 5ng/ml TGF-β. TGF-β( 0. 5 ～ 100ng/ml) had no effects on OC synthesis and formation of the mineralized nodules of HPDLFs. rhBMP2 (0. 25～2mg/ ml) had no remarkable effect on the proliferation of HPDLFs. The ALP activity, OC synthesis and forma-tion of the mineralized nodules of HPDLFs were significantly stimulated by 0. 5～ 2mg /ml rhBMP2. Conclusion The effects of TGF-β and rhBMP2 on HPDLFs are dose-dependent. TGF-P can stimulate HPDLFs to express the early marker of osteoblastic phenotype, and it lacks the ability to promote maturation of the osteogenic phenotype. rhBMP2 can not only stimulate the expression but also promote the maturation of osteoblas-tic phenotype of HPDLFs.展开更多
目的研究miR-145-3p能否调控人牙周膜成纤维细胞(HPDLFs)的自噬及其可能存在的作用机制。方法收集12~18岁因正畸需要减数而拔除的健康前磨牙,采集和培养HPDLFs,并进行鉴定。将miR-145-3p类似物(miR-145-3p-mimics组)、miR-145-3p抑制物(...目的研究miR-145-3p能否调控人牙周膜成纤维细胞(HPDLFs)的自噬及其可能存在的作用机制。方法收集12~18岁因正畸需要减数而拔除的健康前磨牙,采集和培养HPDLFs,并进行鉴定。将miR-145-3p类似物(miR-145-3p-mimics组)、miR-145-3p抑制物(miR-145-3p-inhibitor组)、阴性对照(miR-145-3p normal control,miR-145-3p-NC组)以及带有GFP-LC3的质粒转染至HPDLFs,24 h后荧光显微镜观察荧光发生情况。双荧光素酶报告实验验证miR-145-3p与HDAC4的靶向关系,Western Blot检测各转染组细胞内HDAC4、Beclin-1、P62和LC3的蛋白表达。结果免疫组化结果表明,波形蛋白为阳性染色而角蛋白呈阴性染色,证明其为无混杂细胞的HPDLFs。转染结果显示,miR-145-3p-mimics组的细胞内荧光强度最高,有大量自噬体形成,而miR-145-3p-inhibitor组荧光最弱。双荧光素酶报告实验证实miR-145-3p靶向抑制HPDLFs细胞中HDAC4的表达。4组细胞中miR-145-3p-inhibitor组P62蛋白表达最高(P<0.05),而其他3组差异无统计学意义(P>0.05);miR-145-3p-mimics组细胞内Beclin-1和LC3蛋白表达最高(P<0.05),其他3组差异无统计学意义(P>0.05)。结论miR-145-3p在HPDLFs中可调控自噬,这种作用可能是通过靶向抑制HDAC4表达实现的。展开更多
目的:本实验通过反转录聚合酶链反应,测定不同浓度的重组人骨形成蛋白2(rhBMP2)对人牙周膜成纤维细胞中cbfα1mRNA在不同作用时间点表达,了解rhBMP2对骨改建过程的调控。方法:原代培养人牙周膜成纤维细胞,取生长良好的第6代细胞,分别用2...目的:本实验通过反转录聚合酶链反应,测定不同浓度的重组人骨形成蛋白2(rhBMP2)对人牙周膜成纤维细胞中cbfα1mRNA在不同作用时间点表达,了解rhBMP2对骨改建过程的调控。方法:原代培养人牙周膜成纤维细胞,取生长良好的第6代细胞,分别用25ng/ml、50ng/ml及100ng/ml的rhBMP2作用于细胞,于作用1、3、5、7天后收集细胞。反转录聚合酶链反应检测各组细胞4个时间作用点cbfα1 mRNA含量,PCR产物1%琼脂糖凝胶电泳后,采用Image Pro Plus5.0图像分析软件对电泳胶带亮度进行分析。结果:不同浓度rhBMP2对cbfα1mRNA的表达均表现为初期降低,而后明显增高,至峰值后回落。不同浓度对cbfα1 mRNA表达上调的峰值没有明显差异。100ng/ml和50ng/ml的rhBMP2浓度组能够较快地上调cbfα1mRNA表达至峰值,然后100ng/ml组表现为缓慢下降,50ng/ml组迅速回落;25ng/ml组较慢上调cbfα1mRNA的表达至峰值后,迅速回落。结论:①根据实验各组中cbfα1的表达变化,提示笔者BMP2可以上调HPDLfs中cbfα1的转录水平,并且对cbfα1的表达调控主要为启动作用,cbfα1的表达增高幅度似乎与rhBMP2浓度并不相关。②高浓度组对cbfα1的上调作用迅速而持久,低浓度组的作用则相对迟缓而短暂。提示笔者BMP2可能通过上调cbfα1的表达而促进HPDLfs向成骨细胞转化。展开更多
基金This work was funded by the innovative development funds of Jiangsu Province Hospital of Traditional Chinese Medicine(Y2018CX19).
文摘Periodontitis is a highly prevalent,chronic,non-specific,and immunologically devastating disease of periodontal tissues,caused by microbial infection.This study aims to examine the efficacy and protective mechanism of triclosan(TCS),a bisphenolic,non-cationic component of oral care products,against periodontal inflammation induced by lipopolysaccharide purified from Porphyromonas gingivalis(LPS-PG).TCS markedly downregulated interleukin-6(IL-6),IL-8,and IL-15 in human periodontal ligament fibroblasts(HPDLFs)treated with LPS-PG.By using a liquid chromatography-tandem mass spectrometry(LC-MS/MS)approach,318 differentially expressed proteins(161 upregulated and 157 downregulated)were identified in TCS-pretreated HPDLFs.TCS upregulated HSPA5 and HSP90B1 but downregulated HSPA2.Besides,TCS upregulated miR-548i in HPDLFs,which downregulated IL-15.These results indicate that TCS attenuates the activation of HPDLFs and downregulates the inflammatory cytokines through various mechanisms,thus highlighting its protective role in periodontal inflammation.
基金the National Natural Science Foundation of China (30000191), China Postdoctoral Science Foundation (1999- 17) and S
文摘Objective To evaluate the effects of transforming growth factor β(TGF-β) and recombinant human bone morphogenetic protein 2 (rhBMP2) on human periodontal ligament fibroblasts (HPDLFs). Methods HPDLFs were done primary culture to detect the distinct concentrations of TGF-P and rhBMF2 on its proliferation, alkaline phosphatase (ALP) activity, osteocalcin (OC) synthesis and formation of the minerali-zed nodules, respectively. Results TGF-β (5～100ng/ml) significantly stimulated the proliferation of HPDLFs. The ALP activity of HPDLFs was evaluated evidently by 5ng/ml TGF-β. TGF-β( 0. 5 ～ 100ng/ml) had no effects on OC synthesis and formation of the mineralized nodules of HPDLFs. rhBMP2 (0. 25～2mg/ ml) had no remarkable effect on the proliferation of HPDLFs. The ALP activity, OC synthesis and forma-tion of the mineralized nodules of HPDLFs were significantly stimulated by 0. 5～ 2mg /ml rhBMP2. Conclusion The effects of TGF-β and rhBMP2 on HPDLFs are dose-dependent. TGF-P can stimulate HPDLFs to express the early marker of osteoblastic phenotype, and it lacks the ability to promote maturation of the osteogenic phenotype. rhBMP2 can not only stimulate the expression but also promote the maturation of osteoblas-tic phenotype of HPDLFs.
文摘目的研究miR-145-3p能否调控人牙周膜成纤维细胞(HPDLFs)的自噬及其可能存在的作用机制。方法收集12~18岁因正畸需要减数而拔除的健康前磨牙,采集和培养HPDLFs,并进行鉴定。将miR-145-3p类似物(miR-145-3p-mimics组)、miR-145-3p抑制物(miR-145-3p-inhibitor组)、阴性对照(miR-145-3p normal control,miR-145-3p-NC组)以及带有GFP-LC3的质粒转染至HPDLFs,24 h后荧光显微镜观察荧光发生情况。双荧光素酶报告实验验证miR-145-3p与HDAC4的靶向关系,Western Blot检测各转染组细胞内HDAC4、Beclin-1、P62和LC3的蛋白表达。结果免疫组化结果表明,波形蛋白为阳性染色而角蛋白呈阴性染色,证明其为无混杂细胞的HPDLFs。转染结果显示,miR-145-3p-mimics组的细胞内荧光强度最高,有大量自噬体形成,而miR-145-3p-inhibitor组荧光最弱。双荧光素酶报告实验证实miR-145-3p靶向抑制HPDLFs细胞中HDAC4的表达。4组细胞中miR-145-3p-inhibitor组P62蛋白表达最高(P<0.05),而其他3组差异无统计学意义(P>0.05);miR-145-3p-mimics组细胞内Beclin-1和LC3蛋白表达最高(P<0.05),其他3组差异无统计学意义(P>0.05)。结论miR-145-3p在HPDLFs中可调控自噬,这种作用可能是通过靶向抑制HDAC4表达实现的。
文摘目的:本实验通过反转录聚合酶链反应,测定不同浓度的重组人骨形成蛋白2(rhBMP2)对人牙周膜成纤维细胞中cbfα1mRNA在不同作用时间点表达,了解rhBMP2对骨改建过程的调控。方法:原代培养人牙周膜成纤维细胞,取生长良好的第6代细胞,分别用25ng/ml、50ng/ml及100ng/ml的rhBMP2作用于细胞,于作用1、3、5、7天后收集细胞。反转录聚合酶链反应检测各组细胞4个时间作用点cbfα1 mRNA含量,PCR产物1%琼脂糖凝胶电泳后,采用Image Pro Plus5.0图像分析软件对电泳胶带亮度进行分析。结果:不同浓度rhBMP2对cbfα1mRNA的表达均表现为初期降低,而后明显增高,至峰值后回落。不同浓度对cbfα1 mRNA表达上调的峰值没有明显差异。100ng/ml和50ng/ml的rhBMP2浓度组能够较快地上调cbfα1mRNA表达至峰值,然后100ng/ml组表现为缓慢下降,50ng/ml组迅速回落;25ng/ml组较慢上调cbfα1mRNA的表达至峰值后,迅速回落。结论:①根据实验各组中cbfα1的表达变化,提示笔者BMP2可以上调HPDLfs中cbfα1的转录水平,并且对cbfα1的表达调控主要为启动作用,cbfα1的表达增高幅度似乎与rhBMP2浓度并不相关。②高浓度组对cbfα1的上调作用迅速而持久,低浓度组的作用则相对迟缓而短暂。提示笔者BMP2可能通过上调cbfα1的表达而促进HPDLfs向成骨细胞转化。
