大豆异黄酮抑制Slit2/MAPK信号通路对牙周炎大鼠牙槽骨吸收和炎症反应的影响OA北大核心CSTPCD
Impacts of soy isoflavones inhibiting Slit2/MAPK signaling pathway on alveolar bone resorption and inflammatory response in periodontitis rats
目的:基于Slit同源物2(Slit2)/P38丝裂原活化蛋白激酶(MAPK)信号通路探讨大豆异黄酮(SIF)对牙周炎大鼠牙槽骨吸收和炎症反应的影响.方法:将大鼠分为对照组(Control)、模型组(Model)、SIF低剂量组(L-SIF,25 mg/kg)、SIF高剂量组(H-SIF,75 mg/kg),每组10只,除对照组外,其余各组使用丝线结扎大鼠上颌第一磨牙的牙颈部建立牙周炎模型.L-SIF组和H-SIF组大鼠灌胃相应剂量SIF,Control组和Model组灌胃等量生理盐水,1次/d,连续4周.给药结束后,ELISA检测大鼠血清Slit2、TNF-α、IL-6、IL-1β水平;Micro-CT扫描检测釉牙骨质界至牙槽骨嵴顶(CEJ-ABC)距离和骨矿物质密度(BMD)、骨体积分数(BV/TV),评估牙槽骨丢失情况;HE染色和抗酒石酸酸性磷酸酶(TRAP)染色评估组织炎症反应、骨吸收和破骨细胞活性;免疫组织化学法(IHC)检测牙周组织骨保护素(OPG)和核因子κB受体活化因子配体(RANKL)表达;Western blot检测牙周组织Slit2、P38 MAPK、p-P38 MAPK蛋白表达.结果:与Control组相比,Model组大鼠血清Slit2和TNF-α、IL-1β、IL-6水平、CEJ-ABC距离、牙周组织病理学损伤评分、破骨细胞数量、RANKL阳性表达、Slit2蛋白水平和p-P38 MAPK/P38 MAPK显著升高,BMD和BV/TV、牙周组织OPG阳性表达显著降低(均P<0.05);与Model组相比,L-SIF组和H-SIF组大鼠血清Slit2和TNF-α、IL-1β、IL-6水平、CEJ-ABC距离、牙周组织病理学损伤评分、破骨细胞数量、RANKL阳性表达、Slit2蛋白水平和p-P38 MAPK/P38 MAPK显著降低,BMD和BV/TV、牙周组织OPG阳性表达显著升高(P<0.05),且H-SIF组上述指标变化显著优于L-SIF组(P<0.05).结论:SIF可抑制牙周炎大鼠牙槽骨吸收和炎症反应,改善牙周炎,其作用机制可能与抑制Slit2/P38 MAPK信号通路有关.
Objective:To investigate impacts of soy isoflavones(SIF)on alveolar bone resorption and inflammatory response in periodontitis rats based on Slit homologue 2(Slit2)/P38 mitogen-activated protein kinase(MAPK)signaling pathway.Methods:Rats were separated into Control group,Model group,SIF low-dose group(L-SIF,25 mg/kg)and SIF high-dose group(H-SIF,75 mg/kg),with 10 rats per group,and periodontitis model was established by ligating necks of maxillary first molars of rats with silk thread except for control group.Rats in L-SIF group and H-SIF group were given corresponding doses of SIF by gavage,Control group and Model group were given same amount of normal saline by gavage,once a day,for 4 consecutive weeks.After administration,serum Slit2,TNF-α,IL-6 and IL-1β levels were detected by ELISA;Micro-CT scan was performed to detect distance between cemen-tumenamel junction and alveolar ridge crest(CEJ-ABC),bone mineral density(BMD),bone volume fraction(BV/TV),and alveolar bone loss was evaluated;HE staining and tartrate-resistant acid phosphatase(TRAP)staining were performed to evaluate tissue inflam-mation,bone resorption and osteoclast activity;expressions of osteoprotegerin(OPG)and receptor activator of nuclear factor κB ligand(RANKL)in periodontal tissues were detected by immunohistochemistry(IHC);Western blot was performed to detect protein expressions of Slit2,P38 MAPK and p-P38 MAPK in periodontal tissues.Results:Compared with Control group,serum levels of Slit2,TNF-α,IL-1β,IL-6,CEJ-ABC distance,periodontal histopathological damage score,osteoclast number,positive expression of RANKL,protein level of Slit2 and p-P38 MAPK/P38 MAPK were greatly increased in Model group,BMD,BV/TV and positive ex-pression of periodontal tissues OPG were greatly decreased(all P<0.05);compared with Model group,serum levels of Slit2,TNF-α,IL-1β,IL-6,CEJ-ABC distance,periodontal histopathological damage score,osteoclast number,positive expression of RANKL,pro-tein levels of Slit2 and p-P38 MAPK/P38 MAPK were greatly decreased,BMD,BV/TV and OPG positive expression of periodontal tissues were greatly increased in L-SIF group and H-SIF group(P<0.05),the above indicators in H-SIF group changed greatly better than L-SIF group(P<0.05).Conclusion:SIF can inhibit alveolar bone resorption and inflammatory response in periodontitis rats and improve periodontitis,whose mechanism may be related to inhibition of Slit2/P38 MAPK signaling pathway.
代喆颖;郭怡;刘阳;李汶嘉;周辉
武汉市第三医院口腔科,武汉 430000
口腔医学
大豆异黄酮牙周炎牙槽骨吸收Slit同源物2P38丝裂原活化蛋白激酶
Soy isoflavonesPeriodontitisAlveolar bone resorptionSlit homolog 2P38 mitogen-activated protein kinase
《中国免疫学杂志》 2024 (006)
1131-1136 / 6
武汉市卫生和计划生育委员会科研项目(WX18C06).
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