J Periodontal Res:咬合缺失对大鼠切牙牙周膜基质金属蛋白酶-2、膜型1-MMP、组织抑制物MMP-2表达、萌出率、胶原纤维组织和阻力的影响

2018-03-31 MedSci MedSci原创

本研究旨在探讨失去咬合后(由牙齿缩短引起)对基质金属蛋白酶(MMP)-2,膜型1-MMP(MT1-MMP)和MMP-2(TIMP-2)组织抑制剂表达的影响。大鼠门齿的牙周韧带,以及萌出率,抵抗力和胶原蛋白的组织。

本研究旨在探讨失去咬合后(由牙齿缩短引起)对基质金属蛋白酶(MMP)-2,膜型1-MMP(MT1-MMP)和MMP-2(TIMP-2)组织抑制剂表达的影响。大鼠门齿的牙周韧带,以及萌出率,抵抗力和胶原蛋白的组织。

将雄性Wistar大鼠分为对照组,正常功能组(下颌牙正常萌出);和一个低功能组(14天内其左下切牙每2天缩短一次)。在第1天,第7天和第14天对参数进行评估,并根据萌发过程中切牙的大小确定萌出速率。通过酶谱法测定MMP-2活性,并通过Western印迹定量MT1-MMP和TIMP-2蛋白的表达。如牙周膜双折射所示,在极化光下分析胶原蛋白组织,并且在拔牙之前根据将切牙注入其牙槽窝所需的负荷来确定牙周韧带的阻力。

结果:在功能低下的大鼠中,咬合接触丧失增加了MMP-2的活性和牙萌出率,但降低了牙周膜中MT1-MMP和TIMP-2的表达并破坏了胶原蛋白组织,从而降低了牙周膜的抵抗力。

结论:在门齿萌出后,咬合接触可能是调节牙周韧带对大鼠切牙中观察到的连续萌出过程的重塑和生理抵抗力的重要因素。

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    2018-11-30 feather89
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    2018-04-05 xqptu
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  8. [GetPortalCommentsPageByObjectIdResponse(id=2019901, encodeId=17252019901d9, content=<a href='/topic/show?id=5a6d961841b' target=_blank style='color:#2F92EE;'>#金属蛋白酶#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=32, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=96184, encryptionId=5a6d961841b, topicName=金属蛋白酶)], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTLc3PoqaNe4QTZ947pojXuchvvmkkJN0wyBBbA3LVX2WDkgiaJ7cswu9yvA4CB0NicjcrCfBY1zRPkA/132, createdBy=b3812500089, createdName=ms6897892027066920, createdTime=Wed Dec 05 04:51:00 CST 2018, time=2018-12-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1727204, encodeId=eaef1e272045a, content=<a href='/topic/show?id=986913980dd' target=_blank style='color:#2F92EE;'>#PE#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=20, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=13980, encryptionId=986913980dd, topicName=PE)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f06c33759375, createdName=feather89, createdTime=Fri Nov 30 12:51:00 CST 2018, time=2018-11-30, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1656371, encodeId=d6a816563e1dd, content=<a href='/topic/show?id=4c961202679' target=_blank style='color:#2F92EE;'>#MMP-2#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=32, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12026, encryptionId=4c961202679, topicName=MMP-2)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=761524802925, createdName=juliusluan86, createdTime=Mon Aug 27 21:51:00 CST 2018, time=2018-08-27, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2054452, encodeId=c92c20544528a, content=<a href='/topic/show?id=bd9b4218475' target=_blank style='color:#2F92EE;'>#基质金属蛋白酶#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=41, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=42184, encryptionId=bd9b4218475, topicName=基质金属蛋白酶)], attachment=null, authenticateStatus=null, createdAvatar=http://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTKCRibWHQArPHdSkqP90U1HwwqlGeU7BUgzY240D3v2ibBDJ09ybkGkwOjxz7qRmngZaGlK1taX6hfA/132, createdBy=2e772500094, createdName=小华子, createdTime=Sun Apr 29 02:51:00 CST 2018, time=2018-04-29, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1945177, encodeId=f04319451e74c, content=<a href='/topic/show?id=249488e60fe' target=_blank style='color:#2F92EE;'>#蛋白酶#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=18, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=88760, encryptionId=249488e60fe, topicName=蛋白酶)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=4c37265, createdName=医者仁心, createdTime=Fri Oct 19 00:51:00 CST 2018, time=2018-10-19, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1755887, encodeId=5faa1e55887a3, content=<a href='/topic/show?id=30f46e536d7' target=_blank style='color:#2F92EE;'>#牙周膜#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=32, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=67536, encryptionId=30f46e536d7, topicName=牙周膜)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=4a6e37060729, createdName=xqptu, createdTime=Thu Apr 05 18:51:00 CST 2018, time=2018-04-05, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1757089, encodeId=874e1e57089a4, content=<a href='/topic/show?id=103b421e0e8' target=_blank style='color:#2F92EE;'>#基质#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=25, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=42170, encryptionId=103b421e0e8, topicName=基质)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=281337296540, createdName=ms7899726347904398, createdTime=Tue Aug 21 17:51:00 CST 2018, time=2018-08-21, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1450846, encodeId=84c9145084601, content=<a href='/topic/show?id=f0476e49582' target=_blank style='color:#2F92EE;'>#牙周#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=26, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=67495, encryptionId=f0476e49582, topicName=牙周)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=ab585558129, createdName=liuyong2982, createdTime=Mon Apr 02 09:51:00 CST 2018, time=2018-04-02, status=1, ipAttribution=)]