淫羊藿苷、黄芩苷和大黄素联合作用对体外骨吸收的影响

目的研究淫羊藿苷、黄芩苷和大黄素单独及联合作用对体外骨吸收的影响。方法将从新生兔长骨分离的细胞与牙本质磨片共培养,建立体外骨吸收模型,并加入白细胞介素(IL)-1β及淫羊藿苷0.01μg/ml、黄芩苷0.01μg/ml、大黄素10μg/ml或其等比组合进行干预,动态观察并测量吸收陷窝的数量和面积。结果分离的细胞与牙本质片共同培养24 h后,牙本质片上出现少量吸收陷窝。体外共培养10 d,加入IL-1β的阴性对照组的陷窝数量和面积大于空白对照组(P<0.05)。同时加入提取物的各组陷窝数量和面积均小于阴性对照组(P<0.05)。其中,淫羊藿苷组、黄芩苷组和大黄素组3组之间无显著差异(P>0.05),而组合组陷窝数量和面积均小于上述3组(P<0.01)。结论淫羊藿苷0.01μg/ml、黄芩苷0.01μg/ml、大黄素10μg/ml等比组合可抑制IL-1β诱导的骨吸收。     

淫羊藿苷对斑马鱼牙齿钙磷沉积的影响

目的 研究淫羊藿苷在斑马鱼牙齿发育期间对其钙磷沉积的影响。方法 1月龄斑马鱼随机分为对照组和实验组,对照组常规饲养,实验组于饲养的水中加入淫羊藿苷液。45d后取斑马鱼的第五鳃弓,对其上的牙齿进行扫描电镜观察和微量元素能谱分析。结果 与对照组相比,实验组中牙齿冠1/3和中1/3的Ca含量显著升高,P含量显著降低,Ca/P比值显著升高。结论 淫羊藿苷对牙齿发育中的钙磷沉积有一定的影响。     

淫羊藿苷对小鼠骨髓腔中成骨和成脂分化作用的研究

目的 :通过建立小鼠骨质疏松模型,研究口服淫羊藿苷(Icariin,ICA)对小鼠骨髓腔中成骨分化和成脂分化中的作用。方法:将36只小鼠随机分为3组,分别为假手术组(SHAM组)、卵巢切除组(OVX组)和卵巢切除并灌服淫羊藿苷组(ICA组)。ICA组按每kg体质量25 mg的剂量给予淫羊藿苷每日灌服,SHAM组和OVX组每日给予等体积0.9%氯化钠溶液灌服,于术后9周收样。取左侧股骨和胫骨进行切片染色,提取右侧骨组织中mRNA和蛋白,分析成骨和成脂基因和蛋白的变化。结果:①术后5周,OVX组体重显著高于SHAM组和ICA组(P<0.05)。②HE染色显示,与OVX组相比,ICA组骨髓腔中骨小梁生成增加了50%,脂肪细胞生成减少了70%。③q-PCR和Western blot结果分析显示,与OVX组相比,ICA组骨组织中成骨相关的基因和蛋白表达量显著升高,而成脂相关的基因和蛋白表达量显著降低。结论:口服淫羊藿苷可以通过促进骨吸收并抑制骨髓腔中脂肪细胞的形成,从而对预防和治疗骨质疏松具有重要的意义。     

三种中药提取物抑制牙周炎牙槽骨吸收的实验研究

目的:观察三种中药提取物淫羊藿苷、大黄素和黄芩苷联合应用对实验性牙周炎形成的影响。方法:将3 6只SD大鼠随机分为三组:正常对照组(N)、空白对照组(C)和实验组(E)。用大肠杆菌内毒素脂多糖(E LPS)牙龈局部注射法建立大鼠实验性牙周炎模型,E组造模期间在相同部位注射三种中药提取物混合液,C组注射生理盐水。光学显微镜下观察牙周组织病理学变化,并进行破骨细胞计数,测量釉牙本质界到牙槽嵴顶的距离。结果:E组大鼠牙周组织炎症反应明显轻于C组,破骨细胞数少(P <0 .0 1) ,牙槽骨吸收量小(P <0 .0 5 )。结论:淫羊藿苷、大黄素和黄芩苷联合应用可抑制实验性牙周炎牙槽骨吸收。     

淫羊藿对骨质疏松大鼠骨代谢影响的实验研究

目的:通过建立大鼠骨质疏松模型,观察淫羊藿对骨质疏松大鼠骨代谢的影响。方法:将54只3～4月龄雌性SD大鼠随机分为3组,假手术组(SHAM组)、卵巢切除组(OVX组)和卵巢切除+淫羊藿组(EP组)。建模手术后8周确认大鼠形成骨质疏松则开始给药,实验组给予淫羊藿药汁5.36 g/(kg·d)灌胃,其余两组用等量生理盐水灌胃。分别在第12周和第20周处死大鼠,取血清观察各组骨代谢情况。结果:①术后8、12、20周OVX组、EP组比SHAM组大鼠体重增加快(P<0.05)。②血清生化指标观察,20周时OVX组的血清中P含量比SHAM组明显减少(P<0.05);12周时EP组的血清骨源性碱性磷酸酶(BALP)含量比OVX、SHAM组显著升高(P<0.01)。第20周时EP组的血清骨钙素(BGP)与OVX组比较有显著升高(P<0.05)。第12周与第20周各指标前后比较,20周时OVX组及SHAM组血清碱性磷酸酶(ALP)值均增加(P<0.05),血清BALP值均降低(P<0.05,P<0.01)。结论:切除大鼠双侧卵巢8周后可成功建立骨质疏松症模型;血清生化指标结果表明淫羊藿对骨质疏松症有一定治疗效果     

传统中药淫羊藿苷促骨生成作用的研究进展

<正>因感染、创伤、骨肿瘤原因导致的大范围颌骨缺损,临床治疗颇具困难[1-2]。至目前为止,最理想的骨修复方式还是自体骨移植,但其供需骨丧失和二次手术等缺陷仍是难以逾越的障碍[3]。为了解决这一难题,骨组织工程应运而生,与此同时自体局部的多潜能细胞的移植被广泛地用在骨组织工程中[4]。BMPs(骨形成蛋白)虽然已经广泛地被应用于骨再     

淫羊藿苷对内毒素抑制牙周膜细胞ALP表达的影响

目的：探讨淫羊藿苷对人牙周膜细胞（periodontal ligament cells,PDLC）增殖及对内毒素（Lipopolysaccha-ride,LPS）干扰下碱性磷酸酶（alkaline phosphatase,ALP）的影响。方法：原代培养PDLC,MTT法检测不同浓度（0、10^-5～10^-9mol／L）淫羊藿苷对PDLC增殖的影响;RT—PCR、对硝基苯酚法测定淫羊藿苷对LPS抑制PDLC的ALPmRNA表达和分泌的影响。结果：淫羊藿苷在一定浓度下（10^-6～10^-7mol／L）可促进PDLC增殖;10υg／mLLPS可抑制PDLC的ALP活性;加入10^-6mol／L淫羊藿苷干扰后,对LPS抑制PDLC的ALP有拮抗作用,可提高其mRNA表达和活性。结论：淫羊藿苷在一定浓度时可促进PDLC增殖;可能通过拮抗LPS抑制其ALP的活性。     

淫羊藿苷在口腔分子生物学及细胞生理学研究进展

近年来淫羊藿苷在口腔医学的研究日益增多。为进一步推进淫羊藿苷用于防治口腔疾病的研究, 本文结合国内外对淫羊藿苷的研究报道, 系统论述淫羊藿苷在牙齿发育、牙周组织、牙槽骨组织的分子生物学及细胞生理学作用。     

淫羊藿苷对人牙周膜细胞增殖及骨向分化的影响

目的：探讨淫羊藿苷对人牙周膜细胞增殖及骨向分化的影响,为淫羊藿苷在治疗牙周病方面的应用提供一定依据。方法：体外培养人牙周膜细胞,矿化诱导条件下将第3代细胞与10～0.001mg/L,6个浓度的淫羊藿苷作用,通过噻唑蓝（MTT）比色法、ALP活性测定及BSP表达水平,反应其对人牙周膜细胞增殖及分化的影响。结果：作用24h,各药物浓度均能促进人牙周膜细胞增殖（P〈0.05）。作用48h,1～0.001mg/L组可促进人牙周膜细胞增殖（P〈0.05）。作用72h,0.1～0.001mg/L组可促进人牙周膜细胞增殖（P〈0.05）,10mg/L组抑制人牙周膜增殖（P〈0.05）;作用72h,1～0.001mg/L组可促进人牙周膜碱性磷酸酶（ALP）活性（P〈0.05）;作用72h,0.1～0.001mg/L组的BSP表达水平较对照组显著增加（P〈0.05）。结论：淫羊藿苷在一定浓度范围内可促进人牙周膜细胞增殖及骨向分化。     

雌激素缺乏对大鼠实验性牙周炎骨吸收的影响

目的评价雌激素缺乏及雌激素替代治疗(ERT),对大鼠实验性牙周炎牙槽骨吸收的影响。方法选取Wistar雌性大鼠24只,随机分成三组,Ⅰ组假手术组(n=8)、Ⅱ组卵巢摘除(OVX)组(n=8),Ⅲ组OVX 雌激素给药组(n=8)。21天后,将大鼠一侧上颌第一磨牙的牙周结扎,60天后,处死动物,取材,测得双侧磨牙的骨吸收量。结果结扎侧Ⅱ组的骨吸收量显著高于Ⅰ、Ⅲ组,有统计学意义,P<0.05;Ⅰ、Ⅲ组相比无统计学差别,P>0.05。结论ERT可能有效地防止雌激素缺乏状态下的牙槽骨吸收,但对于伴有菌斑刺激引起的牙周炎,ERT尚不能有效地阻止牙槽骨的吸收。     

Effects of glucocorticoid-induced osteoporosis on bone tissue of rats with experimental periodontitis

ObjectiveTo evaluate the effects of osteoporosis induced by glucocorticoid (GIOP) on bone tissue of rats with experimental periodontitis (EP).Design48 male Wistar rats divided into groups: Naïve, EP, GIOP and GIOP + EP. Rats of GIOP and GIOP + EP groups received 7 mg/kg of dexamethasone intramuscularly once a week for 5 weeks. Following, EP and GIOP + EP groups were subjected to ligature-induced periodontitis. Naïve group experienced no manipulation. After 11 days, the animals were euthanized and left maxillae collected for macroscopic, radiographic, micro-tomographic and microscopic analysis of alveolar bone loss (ABL). Blood samples were collected for determination of bone-specific alkaline phosphatase (BALP) levels and the right femurs were removed for radiographic and biomechanical analysis.ResultsEP caused ABL and reduced BALP levels (p < 0,05), but it did not change the architecture or biomechanics of femur, compared to Naïve. GIOP did not cause ABL, but it significantly decreased alveolar bone mineral density (ABMD), bone percentage and trabecular thickness (Tb.Th) and increased alveolar bone porosity (p < 0.05) and significantly reduced BALP serum levels, as well as radiographic density and Young’s module of femur, compared to Naïve. There was a greater ABL in group GIOP + EP when compared to EP (p < 0.05). GIOP + EP caused a greater decrease on ABMD, Tb.Th, bone percentage and increased bone porosity (p < 0.05) and also presented a significant reduction in BALP levels (p < 0.05), in radiographic density and in Young’s module of femur compared to EP (p < 0.05).ConclusionsGIOP can potentiate the destructive effects of EP on alveolar bone and alter the systemic bone loss, by promoting bone resorption and reducing osteoblast activity.     

Drinking green tea alleviates alveolar bone resorption in ligature-induced periodontitis in mice

ObjectivesIt has been reported that green tea exerts antibacterial, anti-inflammatory, and antioxidant effects. The purpose of the present study was to evaluate the effects of drinking green tea on bone resorption in ligature-induced periodontitis in mice.MethodsSixty C57BL/6 eight-week-old male mice were used. To induce periodontitis, a ligature was placed for 7 days around the upper left second maxillary molar. After ligature removal, the animals were administered different concentrations of green tea (1.5 g/60 mL, 3 g/60 mL, or 6 g/60 mL) or distilled water. At 1 and 2 weeks of administration, the animals were sacrificed and micro-CT images of the maxillae were taken. Next, the depth and area of alveolar bone loss in the buccal and palatal sides were measured. The number of inflammatory cells and osteoclasts in histological sections were counted.ResultsThe result showed ligature-induced alveolar bone loss. Green tea inhibited ligature-induced bone loss in the buccal side in a dose-dependent manner. Histologically, ligature increased the number of inflammatory cells and osteoclasts, but this effect was alleviated by green tea.ConclusionsEvidence from this animal experiment suggested that drinking green tea would be potentially beneficial to reduce alveolar bone loss in ligature-induced periodontitis.     

雷洛昔芬对牙周炎合并系统性绝经后骨质疏松症小鼠模型局部牙槽骨破坏的影响

目的：探讨雷洛昔芬对牙周炎合并系统性绝经后骨质疏松症（PMO）小鼠模型局部牙槽骨破坏的影响。方法：无特定病原级雌性成熟Wistar小鼠,适应性喂养7 d 后,随机分为空白组（保留两侧卵巢,只切除卵巢组织周围与卵巢重量相当的脂肪组织）、对照组（切除两侧卵巢+口腔正畸结扎丝结扎）、实验组（切除两侧卵巢+口腔正畸结扎丝结扎+雷洛昔芬试剂）,每组各15只。术后4周拍摄CT,检测骨密度和骨吸收情况,体视显微镜观察牙槽骨破坏情况,酶联免疫吸附测定法（ELISA）检测破骨相关因子白细胞介素1(IL-1)、IL-1α、转化生长因子(TGF)、肿瘤坏死因子α(TNF-α)、TNF-β的表达水平。采用SPSS 18.0软件包对数据进行统计学分析。结果：对照组新骨形成少于实验组。亚甲蓝染色结果显示,对照组小鼠骨显著吸收,体视显微镜下可见骨破坏,实验组小鼠骨吸收程度较轻。与空白组相比,对照组、实验组牙槽骨密度降低而牙槽骨丧失、IL-1、IL-1α、TGF、TNF-α、TNF-β显著升高（P<0.05）;对照组牙槽骨密度显著低于实验组（P<0.05）,牙槽骨丧失、IL-1、IL-1α、TGF、TNF-α、TNF-β显著高于实验组（P<0.05）。结论：雷洛昔芬可减少PMO牙周炎症小鼠牙槽骨吸收、破骨细胞因子表达,防止牙槽骨破坏而有效防止牙周炎进展。     

Intermittent administration of parathyroid hormone ameliorated alveolar bone loss in experimental periodontitis in streptozotocin-induced diabetic rats

ObjectiveIntermittent administration of parathyroid hormone (PTH) has been demonstrated to have anabolic effects on bone metabolism and is approved for use in the treatment of osteoporosis. This study evaluates the role of intermittent PTH administration on alveolar bone loss in streptozotocin (STZ)-induced diabetic rats.DesignFifty male Sprague Dawley rats were randomly divided into the following five groups: (1) a control group (saline placebo without ligature and STZ injection), (2) a PTH group (PTH administration without ligature and STZ injection), (3) an L group (saline placebo with ligature), (4) an L + STZ group (saline placebo with ligature and STZ injection), and (5) an L + STZ + PTH group (PTH administration with ligature and STZ injection). PTH was administered at 75 μg/kg per dose four times a week for 28 days. Subsequently, all rats were sacrificed, and their mandibles were extracted for micro-computed tomography (micro-CT) scanning, as well as histological and immunochemical evaluation.ResultsMicro-CT scanning demonstrated the anabolic effect of PTH on alveolar bone metabolism in STZ-induced diabetic rats (P < 0.05), and histomorphometry indicated that PTH inhibited inflammation of the periodontium and increased the level of osteoblastic activity (P < 0.05). Immunochemical evaluation showed that rats subjected to both ligature placement and STZ injection had the highest receptor activator of nuclear factor kappa B ligand (RANKL)/osteoprotegerin (OPG) ratio and that PTH administration decreased this ratio.ConclusionIntermittent systemic PTH administration effectively reduced alveolar bone loss and ameliorated the manifestation of experimental periodontitis in STZ-induced diabetic rats.     

环肌酸抑制大鼠牙周炎周围牙槽骨吸收的实验研究

目的:通过体外和体内实验探讨环肌酸对牙周炎造成的牙槽骨吸收的抑制作用.方法:体外实验通过细胞活力测定、碱性磷酸酶染色和茜素红染色、抗酒石酸酸性磷酸酶染色和实时反转录聚合酶链反应(RT-PCR)等检测,评价环肌酸对成骨细胞和破骨细胞增殖和分化的影响.动物实验将20只大鼠分为4组,A组为对照组,B组采用牙周结扎+生理盐水注...     

阿仑膦酸钠防治牙槽骨吸收的实验研究

目的用骨质疏松及牙槽骨吸收动物模型评价阿仑膦酸盐对骨吸收的防治作用。方法建立骨质疏松及牙槽骨吸收的动物模型,建模手术次日,给实验组皮下注射阿仑膦酸钠液,每周3次,共6周。用血生化指标、骨生物力学、骨密度测量及组织形态学方法进行药效评价。结果股骨密度对照组（0.123g/cm2）与实验组（0.151g/cm2）相比明显降低（P<0.01）;血清碱性磷酸酶对照组（259.63U/L）与实验组（151.13U/L）相比明显升高(P<0.01);骨生物力学各项指标,实验组与对照组也有明显差异。组织形态学实验组牙龈轻度炎症,牙槽嵴顶未见明显吸收;对照组牙龈乳突炎症明显,上皮钉突增生,炎细胞浸润,牙槽嵴顶明显吸收。结论阿仑膦酸钠能减少骨质丢失从而可以防止骨质疏松及病理性牙槽骨骨吸收。     

侵袭性牙周炎牙槽骨吸收状况及相关因素分析

目的 评价未经治疗的侵袭性牙周炎(aggressive periodontitis,AgP)患者牙槽骨吸收状况并分析与牙槽骨吸收状况有关的因素,以期为临床提供参考.方法 对108例未经治疗的AgP患者[男45例,女63例;年龄≤25岁者34例(A组),＞25岁者74例(B组)]进行吸烟状况和教育背景的问卷调查,并测量全口牙邻面位点探诊深度(probing depth,PD,浅袋:PD=3、4 mm,中袋:PD=5、6 mm,深袋:PD≥7 mm);根据全口X线根尖片评价邻面牙槽骨吸收状况(轻、中、重度骨吸收).结果 实际共测量了2841颗牙.浅袋与轻度骨吸收(r=0.518,P=0.000)、深袋与重度骨吸收(r=0.366,P=0.000)均呈正相关;AgP患者男性轻、中、重度骨吸收牙数(分别为7.1±6.2、12.5±4.7、5.1±0.6)与女性(分别为8.7±6.3、12.9±4.8、4.2±0.5)差异无统计学意义(P值分别为0.707、0.671和0.413);B组中、重度骨吸收牙数(分别为13.6±4.2、5.2±3.7)显著多于A组(分别为11.0±5.5、3.6±3.5),P＜0.01;受过高等教育和未受高等教育者轻、中、重度骨吸收牙数差异无统计学意义(P值为0.314、0.862和0.407);吸烟是重度骨吸收AgP患者的危险因素之一(OR=1.961).结论 AgP患者PD与牙槽骨吸收程度相关;年龄和吸烟是影响AgP患者牙槽骨吸收的重要因素.     

2种给药方式下辛伐他汀对牙周炎骨质疏松大鼠上颌骨骨丢失的影响

目的比较辛伐他汀(Simvastatin,SIM)在不同给药方式下抑制牙周炎骨质疏松大鼠上颌骨骨丢失的作用效果。方法 24只4月龄雌性SD(Sprague Dawley)大鼠,随机分成4组:假手术组(SHAM),去势+绑线组(OVX+LIG),去势+绑线+辛伐他汀灌胃给药组(OVX+LIG+Oral SIM),去势+绑线+辛伐他汀局部用药组(OVX+LIG+Local SIM)。适应性喂养1周后,进行骨质疏松造模手术——双侧卵巢切除术(OVX),4周后,进行牙周炎造模手术——分别于双侧上颌骨第一、第二磨牙进行8字结扎绑线术(LIG),4周后拆除绑线,用药组开始辛伐他汀给药。8周后处死所有大鼠,收集双侧上颌骨和血清,分别进行进一步检测。检测包括micro-CT扫描,硬组织切片观察、染色,酶联免疫吸附实验(ELISA)。结果相比于对照OVX+LIG组,OVX+LIG+Local SIM组可见明显釉牙骨质界-牙槽嵴顶(CEJ-ABC)距离的减少(P<0.05),OVX+LIG+Oral SIM组与OVX+LIG+Local SIM组可见明显牙槽骨的骨密度(BMD)和骨体积分数(BVF)升高,OVX+LIG+Oral SIM组可见明显骨钙素(OC)上升,抗酒石酸酸性磷酸酶5b(TRAP5b)下降。结论局部或全身系统应用辛伐他汀能减缓牙周炎伴骨质疏松大鼠上颌骨的骨丢失,其中局部注射辛伐他汀对牙槽嵴顶骨形成具有促进作用。     

伴牙槽嵴吸收的牙周炎患者上前牙龈乳头缺陷程度影响因素初探

目的:探讨有牙槽嵴吸收时上前牙不同程度龈乳头缺陷的相关影响因素。方法:选择2019年6至12月就诊于北京大学口腔医学院·口腔医院牙周科,且经治疗后牙周炎控制稳定并定期进行牙周维护的14例牙周炎患者的64个上前牙龈乳头,通过标准化临床图像及锥形束CT影像资料综合分析,评价邻接触点至骨嵴顶的距离（distance from...