骨形成蛋白与支气管哮喘

骨形成蛋白参与多种组织的纤维化进程,包括调节炎症反应,调控细胞的增殖与凋亡、纤维化、细胞外基质沉积及上皮-间质转化,诱导成纤维细胞表型转化.其信号经Smad通路转导.Gremlin是一种骨形成蛋白拮抗剂,可以阻碍骨形成蛋白与其受体的结合,抑制Smad蛋白磷酸化.本文旨在探讨骨形成蛋白及其拮抗剂gremlin在支气管哮喘中的分布及作用,阐述Smad信号通路及其与其他信号转导途径的联系,为支气管哮喘发病机制的研究及治疗提供新的思路.     

骨形成蛋白与支气管哮喘

骨形成蛋白参与多种组织的纤维化进程,包括调节炎症反应,调控细胞的增殖与凋亡、纤维化、细胞外基质沉积及上皮一间质转化,诱导成纤维细胞表型转化。其信号经Smad通路转导。Gremlin是一种骨形成蛋白拮抗剂,可以阻碍骨形成蛋白与其受体的结合,抑制Smad蛋白磷酸化。本文旨在探讨骨形成蛋白及其拮抗剂gremlin在支气管哮喘中的分布及作用,阐述Smad信号通路及其与其他信号转导途径的联系,为支气管哮喘发病机制的研究及治疗提供新的思路。     

洛伐他汀对成骨细胞骨形态发生蛋白2表达及碱性磷酸酶活性的影响

目的　观察洛伐他汀对成骨细胞骨形态发生蛋白 2 (BMP 2 )表达及碱性磷酸酶 (ALP)活性的影响 ,初步探讨洛伐他汀刺激成骨细胞的作用机制。　方法　体外培养成年小鼠的成骨细胞 ,对照组不用洛伐他汀 ,实验组以不同浓度 (0 2、0 5、1 0 μmol L)的洛伐他汀作用 72h后行细胞BMP 2免疫细胞化学染色、ALP染色及细胞ALP比活性测定。　结果　洛伐他汀作用 72h后 ,细胞ALP染色增强 ,胞浆内BMP 2表达水平增高 ,并随洛伐他汀浓度的增加而增加 ;对照组的成骨细胞几乎无BMP 2的表达。对照组ALP比活性为 (70 5 5 6± 171 4 0 )U·g- 1 ·L- 1 ,实验组洛伐他汀不同浓度组分别为 (716 39± 2 94 6 1)U·g- 1 ·L- 1 、(84 9 70± 2 30 0 9)U·g- 1 ·L- 1 、(983 4 8± 2 0 8 35 )U·g- 1 ·L- 1 ,其中 1 0μmol L组与对照组细胞ALP活性的差异有显著性 (P <0 0 5 )。　 结论　洛伐他汀的成骨作用与其促进成骨细胞BMP 2的高表达、引起细胞自分泌或旁分泌BMP 2增多、细胞ALP活性增高有关。     

氟化物对成纤维细胞和成骨细胞骨形态发生蛋白-2表达的影响

目的观察氟化物对成纤维细胞和成骨细胞骨形态发生蛋白-2（BMP-2）表达的影响。方法采用体外细胞培养的方法，将细胞分为对照组和6个染氟（F^-，0．1、1．0、100．0、1000．0、10000．0、20000．0μg／L）组，分别在5个染氟时间段（2、4、24、48、72h）收集培养上清液和细胞，应用酶联免疫吸附法（ELISA）和免疫组化方法检测BMP-2蛋白，RT-PCR方法检测染氟48hBMP-2mRNA的表达。结果与对照组比较．成纤维细胞染氟48hBMP-2mRNA表达呈普遍增强趋势，但差异无统计学意义（P〉0．05）；免疫组化检查，可见染氟0．1、1．0、1000．0μg／L组成纤维细胞BMP-2阳性着色较对照组增强；染氟72h，培养上清中BMP-2蛋白在1．0、100．0、20000．0μg／L组分别为（0．11±0．01）、（0．11±0．01）、（0．11±0．01），与对照组（0．07±0．01）比较有明显增高（P〈0．05）。与染氟成纤维细胞比较，染氟成骨细胞BMP-2mRNA和蛋白表达升高出现早．持续时间较长．增强程度更为明显。结论成纤维细胞和成骨细胞在氟化物的刺激下，BMP-2mRNA和蛋白表达有所升高，推测BMP-2可能是氟化物诱导成纤维细胞中成骨细胞核心结合因子α1（cbfa1）和骨钙素（OCN）表达的重要中介环节。     

腺病毒介导的人骨形态发生蛋白-7基因转染大鼠骨髓基质干细胞及其表达

目的 利用人骨形态发生蛋白-7(hBMP-7)腺病毒表达载体(Ad-hBMP-7)转染大鼠骨髓基质干细胞(BMSC)的方法,观察Ad-hBMP-7转染后对BMSC分化的影响,探讨基冈治疗的可能性.方法 获取Wistar大鼠BMSC,并分为3组:Ad-hBMP-7转染组、Ad-绿色荧光蛋白(Ad-GFP)转染组、未转染组.将Ad-hBMP-7和Ad-GFP的病毒液分别转染体外培养的大鼠BMSC,用RT-PCR法检测hBMP-7 mRNA的表达,7 d后用Western blot法检测hBMP-7的蛋白表达,同时进行碱性磷酸酶(ALP)染色.结果 在Ad-hBMP-7转染组,RT--PCR可检测到hBMP-7 mRNA的表达(470 bp),Western blot可检测到hBMP-7蛋白分泌(相对分子质量为15×103),转染后第10天ALP染色多数细胞-胞浆呈棕黑色阳性着色;而Ad-GFP转染组和未转染组ALP染色阳性细胞少见并且未检测到hBMP-7蛋白分泌.结论 Ad-hBMP-7基因可高效转染BMSC,促进BMSC向成骨细胞转化,为利用hBMP-7开展局部基因治疗的研究奠定了基础.     

骨形态发生蛋白在心脏大血管疾病发生发展中的作用

骨形态发生蛋白（BMPs）最初在骨和软骨组织中被发现,隶属于转化生长因子-β超家族。近年来,随着骨形态发生蛋白（BMPs）相关研究的深入,BMPs相关信号通路及其调控也被越来越精确的描述,其在机体各组织中的表达及作用也各不相同。研究发现,BMPs的表达变化与血管病变密切相关,尤其是在动脉钙化、动脉粥样硬化、血管炎症、病理性心肌重构、血管内皮功能障碍、急性冠脉综合征等病理情况的形成过程中发挥重要作用。因此,对BMPs 进行深入研究和探讨可对临床心血管疾病的预防和诊疗提供一条新思路。     

燃煤型氟中毒大鼠骨形成蛋白表达变化研究

目的 复制燃煤型氟中毒大鼠模型,并观察骨形成蛋白-2(BMP-2)和骨形成蛋白-3 (BMP-3)在不同染氟剂量和染氟时间大鼠血清中的表达变化.方法 断乳4周80～ 120 g清洁级SD大鼠120只,按体质量随机分为对照组、低氟组、中氟组、高氟组,每组30只,雌雄各半.食用病区煤烘玉米,复制燃煤型氟中毒动物模型.对照组、低氟组、中氟组、高氟组的含氟量分别为6.30、9.56、15.89、23.00mg/kg.各组分别于染氟第30、90、180天时股动脉放血法处死10只动物,酶联免疫吸附测定(ELISA)法检测血清BMP-2和BMP-3水平.结果 ①BMP-2测定结果:染氟第90、180天时,血清BMP-2组间比较差异有统计学意义(F值分别为385.08、173.98,P均＜0.01).其中低氟组、中氟组、高氟组在染氟第90天时[(18.80±0.43)、(22.22±0.85)、(25.14±0.69)μg/L]和第180天[(7.98±0.68)、(8.97±0.78)、(15.04±0.89)μg/L]血清BMP-2表达高于对照组[(12.54±1.29)、(7.53±0.97)μg/L,P均＜0.05],且BMP-2表达随着染氟剂量的增加而增加(P均＜0.05).4组不同染氟时间血清BMP-2组内比较差异有统计学意义(F值分别为55.42、511.58、686.35、671.64,P均＜0.01).其中染氟第90天时,各组血清BMP-2[(12.54±1.29)、(18.80±0.43)、(22.22±0.85)、(25.14±0.69)μg/L]均高于同组染氟第30天时[(11.75±1.15)、(11.42±1.07)、(11.38±0.92)、(11.15±1.03)μg/L,P均＜0.05];染氟第180天时,各组血清BMP-2[(7.53±0.97)、(7.98±0.68)、(8.97±0.78)、(15.04±0.89)μg/L]均低于同组染氟第90天时(P均＜ 0.05).②BMP-3测定结果:染氟第30、90、180天时,血清BMP-3组间比较差异无统计学意义(F值分别为0.7215、1.2951、0.0964,P均＞0.05).结论 大鼠较长时间摄人过量氟,刺激BMP-2表达增强,但随着摄氟时间延长,氟对BMP-2的表达呈现抑制作用.氟对BMP-3表达的影响不及对BMP-2敏感.     

骨形态发生蛋白7诱导骨髓间充质细胞向软骨细胞分化的作用

目的 观察转染骨形态发生蛋白7(BMP7)基因的骨髓间充质细胞(BMSCs)所表达的BMP7蛋白在体外诱导该细胞向软骨细胞方向分化的作用.方法 分别取诱导液诱导的BMSCs(诱导组)、转染BMP7基因的BMSCs(转染组)以及未处理的BMSCs(对照组),在6孔板中细胞爬片,经HE、阿尔新蓝染色后,在倒置显微镜下观察形态.3组BMSCs培养7、14、21 d后,以半乳糖醛酸为对照品绘制标准曲线法测定培养液中糖胺多糖(GAG),ELISA法测定胶原蛋白Ⅱ.结果 HE、阿尔新蓝染色后,转染组和诱导组BMSCs分别呈红色和蓝色,具有软骨细胞特性.BMP7诱导后的细胞团表达了GAG和胶原蛋白Ⅱ.第21天,转染组GAG为(39.5±5.4)mg/L,胶原蛋白Ⅱ为(152.8±14.5)μg/L;诱导组GAG为(40.8±6.1)mg/L,胶原蛋白Ⅱ为(155.5±19.3)μg/L;对照组GAG为(17.1±3.4)mg/L,胶原蛋白Ⅱ为(89.7±14.3)μg/L;与对照组比较,转染组与诱导组GAG、胶原蛋白Ⅱ水平明显增高(P均<0.05),转染组与诱导组比较,则未见明显改变(P>0.05).结论 转染BMP7基因的BMSCs表达的活性BMP7能够诱导BMSCs向软骨细胞方向分化,且其诱导水平达到了诱导液的诱导水平.     

Bone morphogenetic protein 4 modulates c-Kit expression and differentiation potential in murine embryonic aorta-gonad-mesonephros haematopoiesis in vitro

The transforming growth factor-beta-related factor bone morphogenetic protein 4 (BMP4) is expressed in the human embryonic aorta-gonad-mesonephros (AGM) coincident with the emergence of haematopoietic cells and influences postnatal mammalian haematopoietic stem cells in vitro. To investigate the role of BMP4 in mammalian embryonic haematopoiesis, cells were isolated from murine AGM and two populations of CD34(+) cells with different levels of c-Kit expression and multipotency were identified. CD34(+)/c-Kit(high) cells express CD45 and are haematopoietic-restricted progenitors. In contrast, CD34(+)/c-Kit(low) cells are Flk1+/CD45(neg) and generate adherent colonies in ex vivo culture that resemble haemangioblast colonies identified in other systems. The addition of BMP4 to AGM cells resulted in expansion of the CD34(+)/c-Kit(low) cell pool within 48 h, via a combination of down modulation of the c-Kit receptor in CD34(+)/c-Kit(high) cells and proliferation. In long-term culture, BMP4 increased the growth/survival of CD34(+)/c-Kit(high) haematopoietic progenitors, effects that were blocked by BMP inhibitors. CD34(+)/c-Kit(high) progenitors cultured with BMP4 also generated adherent colonies typical of c-Kit(low) cells. These results suggest that BMP4 regulates c-Kit expression and differentiation potential in CD34(+) AGM cells and supports a role for BMP signalling in the maintenance of multipotency during embryonic haematopoiesis, providing an insight into stem cell homeostasis within the mammalian haematopoietic niche.     

不同剂量重组人骨形态发生蛋白2对人成骨肉瘤细胞系SaOS-2成骨活性的影响

目的 探讨不同剂量的重组人骨形态发生蛋白2(rhBMP-2)对人成骨肉瘤细胞系SaOS-2成骨活性的影响.方法 将体外培养的SaOS-2细胞分别暴露于0(对照)、2、20、200μg/L的rhBMP-2中,培养12、24、48 h后,以实时荧光定量PCR方法测定SaOS-2细胞碱性磷酸酶(ALP)和骨钙素(BGP)mRNA的表达水平.结果 SaOS-2细胞ALP和BGP mRNA表达量随rhBMP-2刺激剂量的增加呈上升趋势.20μg/L rhBMP-2作用48 h(1.60±0.64)和200 μg/L rhBMP-2作用12、48 h(1.70±0.41、1.80 ±0.19)SaOS-2细胞ALP mRNA 相对表达量较同一时间段对照组(12、48 h分别为0.80±0.25、0.74±0.21)明显升高(P均<0.05).2μg/LrhBMP-2作用24 h(1.67±0.33)、20μg/L rhBMP-2作用12、24 h(2.42±0.13、1.82±0.14)和200 μg/L rhBMP-2作用12、24 h(1.46±0.11、1.24 ±0.07)SaOS-2细胞BGP mRNA相对表达量较同一时间段对照组(12、24 h分别为1.01±0.14、0.84±0.12)明显升高(P均<0.05).结论 rhBMP-2能明显刺激SaOS-2细胞ALP、BGP mRNA表达升高,并呈现剂量一效应关系,但表现的剂量特征不同.

Abstract：

Objective To investigate the effect of recombinant human bone morphogenetic protein 2 (rhBMP-2) on the osteogenic activities of human osteosarcoma cell line SaOS-2. Methods SaOS-2 cells were exposed to rhBMP-2 for 12,24,48 h at 0(control) ,2,20,200 μg/L, respectively. The mRNA expression of alkaline phosphatase(ALP) and bone gla(BCP) were detected by real time polymerase chain reaction. Results The mRNA expression of ALP and BGP of SaOS-2 cells increased gradually with rhBMP-2. The mRNA expression of ALP of the 20 μg/L group exposed for 48 h(1.60 ± 0.64), and the 200 μg/L group exposed for 12,48 h(1.70 ± 0.41, 1.80±0.19) were significantly higher than those of control (12 h: 0.80±0.25, 48 h: 0.74±0.21, allP<0.05). The mRNA expression of BGP of the 2 μg/L group exposed for 24 h(1.67 ± 0.33), the 20 μg/L group exposed for 12,24 h(2.42 ± 0.13,1.82 ± 0.14) and the 200 μg/L group exposed for 12,24 h(1.46 ± 0.11,1.24 ± 0.07) were significantly higher than those of control( 12 h: 1.01 ± 0.14, 24 h: 0.84 ± 0.12, all P< 0.05). Conclusions rhBMP-2 can promote the mRNA expression of ALP and BGP of SaOS-2 cells. They have a dose-response relationship, but represent a different dose-response effect.     

Balance between bone morphogenetic proteins and their antagonists in kidney injury

Dialysis dependency is one of the leading causes of morbidity and mortality in the world, and once end-stage renal disease develops, it cannot be reversed by currently available therapy. Although the administration of large dose of bone morphogenetic protein-7 (BMP-7) has been shown to repair established renal injuries and improves renal function, pathophysiological role of endogenous BMP-7 and regulatory mechanism of its activities remain elusive. Here we show that uterine sensitization-associated gene-1 (USAG-1), novel BMP antagonist abundantly expressed in the kidney, is the central negative regulator of BMP function in the kidney, and that mice lacking USAG-1 (USAG-1(-/-) mice) are resistant to kidney injuries. USAG-1(-/-) mice exhibited prolonged survival and preserved renal function in acute and chronic renal injuries. Renal BMP signaling, assessed by phosphorylation of Smad proteins, is significantly enhanced in USAG-1(-/-) mice during renal injury, indicating that the preservation of renal function is attributed to enhancement of endogenous BMP signaling. Furthermore, the administration of neutralizing antibody against BMP-7 abolished reno-protection in USAG-1(-/-) mice, indicating that USAG-1 plays a critical role in the modulation of reno-protective action of BMP, and that inhibition of USAG-1 will be promising means of development of novel treatment for kidney diseases.     

重组骨形态发生蛋白7基因转染骨髓间充质干细胞及其在该细胞中的表达

目的将重组骨形态发生蛋白7质粒（pcDNA3．1-BMP7）转染至体外培养的兔骨髓间充质干细胞中．测定骨形态发生蛋白7基因在该细胞中的表达。方法骨形态发生蛋白7基因序列测定、拼接后与报道的骨形态发生蛋白7基因序列对照：脂质体介导pcDNA3．1-BMP7转染骨髓间充质干细胞，G418筛选14d，Western blot、PCR、原位杂交检测骨形态发生蛋白7基因的表达。结果序列测定证实与GenBank报道的骨形态发生蛋白7全长基因序列一致：转染pcDNA3．1-BMP7质粒的骨髓间充质干细胞有大量骨形态发生蛋白7蛋白及骨态发生蛋白7 mRNA表达。结论脂质体介导下，重组真核表达载体pcDNA3．1-BMP7能被转入骨髓间充质干细胞．且表达了骨形态发生蛋白7及骨形态发生蛋白7 mRNA。     

人重组骨形态发生蛋白2和13对软骨细胞蛋白多糖基因表达调控的研究

目的 研究重组人骨形态发生蛋白(rhBMP)2和rhBMPl3对软骨细胞蛋白多糖基因表达的调控作用.方法 采用1,9二甲基亚甲蓝比色法检测高(625 ng/ml)、中(125 ng/ml)和低(25 ng/ml)浓度组的rhBMP2和rhBMP13对软骨细胞硫化糖胺聚糖生成的影响;采用反转录聚合酶链反应测定3种不同浓度组的rhBMP2和rhBMP13对软骨细胞聚集蛋白聚糖mRNA表达的影响;用Hoechst Dve法检测不同浓度组的rhBMP2和rhBMP13对软骨细胞的增殖作用.结果 与对照相比,不同浓度的rhBMP2和rhBMP13促进软骨聚集蛋白聚糖mRNA的表达差异均有统计学意义(P＜0.05);在DNA的检测中,与对照相比,不同浓度组的rhBMP2和rhBMP13促进软骨细胞增殖差异均无统计学意义.结论 rhBMP2和rhBMP13均能增加软骨细胞聚集蛋白聚糖的表达,rhBMP2比rhBMP13对软骨细胞基因表达有更大的正向调控作用.但rhBMP2和rhBMP13对软骨细胞增殖差异无统计学意义.     

氟对鼠成骨细胞BMP表达的影响及锌的拮抗作用

目的：研究氟对大鼠成骨细胞中骨形态发生蛋白(BMP-2)表达的影响以及锌制剂能否拮抗氟化物的作用。方法：体外培养SD乳鼠成骨细胞，给予不同剂量氟或／和锌制剂，测定细胞增殖及AKP活性，通过免疫组化方法对各组成骨细胞表达BMP-2进行定量分析。结果：10^-4mol/L ZnSO4及10^-5mol/L NaF能促进细胞增殖，增强AKP活性；10^-3mol／L NaF则抑制细胞增殖及AKP活性；高氟(10^-3mol／L)可促进BMP-2表达，但10^-4mol／L ZnSO4加入高氟组后未发现有抑制BMP-2表达的作用。结论:高氟可促进成骨细胞BMP-2表达，锌制剂能拮抗高氟的毒性作用，但对BMP-2的表达无拮抗作用。     

骨形态发生蛋白7基因变异与新疆维吾尔族人群高甘油三酯血症相关

目的 探讨骨形态发生蛋白7(BMP7)基因变异与新疆维吾尔族人群血脂异常的关系.方法 选取1514例新疆维吾尔族人群作为研究对象.测序筛查BMP7基因功能区的变异位点,选取代表性变异位点应用TaqMan-PCR技术在大样本人群中进行基因型鉴定,并开展病例-对照关联研究.结果 在BMP7基因的功能区共发现5个新的和8个已知的变异位点.BMP7基因的2个代表性变异位点rs6025422、rs17480735均符合Hardy-Weinberg平衡.rs6025422变异的AA、AG、GG基因型在高甘油三酯血症组及对照组中的频率分布存在统计学差异(P=0.001),并且AA、AG、GG基因型的甘油三酯水平呈现递减趋势.应用logistic回归分析校正性别、年龄、体质指数、血压、吸烟及饮酒因素的影响后显示,rs6025422变异与高甘油三酯血症显著相关(OR:0.562,95%CI:0.393～0.802,P=0.002).结论 BMP7基因变异位点rs6025422可能与新疆维吾尔族人高甘油三酯血症相关.

Abstract：

Objective To analyze the association between the genetic variations of functional region in bone morphogenetic protein ( BMP7 ) gene and dyslipidemia in Chinese Uygur individuals. Methods The case-control study was conducted in 1514 Uygur Chinese based on epidemiological investigation. The all exons, segmental introns and the promoter regions of BMP7 gene were sequenced in 48 out of 1514 Uygur Chinese. Representative variations were then selected according to the minor allele frequency (MAF) and linkage disequilibrium, and genotyped using the TaqMan polymerase chain reaction method in 1514 Uygur Chinese, a relatively isolated general population in a relatively homogeneous environment, to observe the association between genetic variations of BMP7 gene and dyslipidemia. Results Five novel and eight known variations in the BMP7 gene were identified. All genotype distributions were tested for deviations from HardyWeinberg equilibrium. There were significant differences of genotype distribution of rs6025422 between hypertriglyceridemia group and control group ( P = 0. 001 ). The levels of triglyceride (TG) showed a decreasing teadency in individuals with AA, AG and GG genotypes of rs6025422. Odd ratio (OR) value adjusted for age, gender, body mass index, smoking and alcohol drinking habits was 0. 562 by logistic regression analysis (95% CI: 0. 393 - 0. 802, P = 0. 002 ). Concluslon The present study shows rs6025422 polymorphism in the BMP7 gene is linked with hypertriglyceridemia phenotype in Uygur Chinese population.     

Bone morphogenetic protein-2 is a negative regulator of hepatocyte proliferation downregulated in the regenerating liver

INTRODUCTIONBone morphogenetic proteins (BMPs) were first identified in the 1960s[1]. BMPs are multi-functional growth factors that belong to the transforming growth factor beta (TGF-β) superfamily[2]. Mature BMPs are 30-38 kDa proteins that utilize BMP …     

Bone morphogenetic protein 2 (BMP-2) induces sequential changes of Id gene expression in the breast cancer cell line MCF-7

 Bone morphogenetic proteins (BMPs) are involved in the development of various organs including the mammary gland. They are well-regulated and act in a time-, concentration- and cell-type-specific manner. We found that BMP-2 is expressed in primary breast tumor tissue samples and in breast cancer cell lines. Hybridization of labeled cDNA, obtained from the breast cancer cell line MCF-7, against the Atlas human cDNA expression array revealed differential gene expression depending on BMP-2 treatment. The most prominent changes were observed for the helix-loop-helix proteins Id-1, Id-2 and Id-3. Id-1 expression had increased severalfold after 4 h and was even higher after 24 h. Id-2 and Id-3 were more strongly induced after 4 h and showed no further significant change after 24 h. Analysis of cell-cycle distribution revealed a marked increase of the sub-G1 phase after 48 h in serum-deprived cells. In the presence of BMP-2 no change was observed over 48 h indicating that BMP-2 does not induce apoptosis. In addition, expression of caspase-3 was reduced in BMP-2-treated cells after 24 h. In summary, our results clearly indicate that BMP-2 is a susceptibility factor keeping the cells ready for the integration of various other signals for cell progression. Received: 16 November 1999 / Accepted: 16 December 1999     

骨成形蛋白7对大鼠肝星状细胞增殖的抑制作用

目的 研究骨成形蛋白7 (BMP7)对大鼠肝星状细胞(HSC)增殖的抑制作用.方法 体外培养HSC-T6细胞,分为对照组、TGFβ1组、TGFβ1+ BMP7组和TGFβ1+ BMP7+ Noggin组.RT-PCR法检测果蝇蛋白质1(smad1)、α-平滑肌肌动蛋白(α-SMA)、gremlin和纤维连接蛋白(FN)mRNA的表达,Western印迹法检测磷酸化smad1/5/8(P-smad1/5/8)、α-SMA、gremlin蛋白的表达.采用单因素方差分析、LSD检验、Dunnett T3检验和Pearson直线相关分析进行统计学处理.结果 对照组HSC-T6细胞中可见P-smad1/5/8、α-SMA、gremlin及FN的表达,TGFβ1刺激后表达量明显增加,差异有统计学意义(均P＜0.05).与TGFβ1组比较,TGFβ1+ BMP7组α-SMA、gremlin及FN表达下调,但P-smad1/5/8蛋白表达增加(1.613±0.031比2.503±0.014;t=34.89,P＜0.05).TGFβ1+ BMP7+ Noggin组α-SMA、gremlin及FN表达较TGFβ1+ BMP7组增加,而P-smad1/5/8蛋白表达下调(t=34.05,P＜0.05).smadl mRNA在各组表达均无显著变化.结论 BMP7对α-SMA、gremlin和FN均有较强的抑制作用.