Structural requirements for the action of parathyroid hormone‐related protein (PTHrP) on bone resorption by isolated osteoclasts

Structural requirements for the action of parathyroid hormone‐related protein (PTHrP) on bone resorption by isolated osteoclasts
复制标题

甲状旁腺激素相关蛋白(PTHrP)对分离破骨细胞骨吸收作用的结构要求

DOI:
10.1002/jbmr.5650060114
复制
发表时间:
1991
影响因子:
6.2
通讯作者:
T. Martin
T. Martin
中科院分区:
医学1区
文献类型:
--
作者:
R. Evely;A. Bonomo;H. Schneider;J. Moseley;J. Gallagher;T. Martin

文献摘要

参考文献

被引文献

相似文献

甲状旁腺激素相关蛋白(PTHrP)通过其对骨骼和肾脏的作用在恶性肿瘤的体液性高钙血症(HHM)综合征中起重要作用。在本研究中,采用分离的破骨细胞骨吸收实验来研究该肽的作用及其吸收效果的结构-活性关系。与甲状旁腺激素一样,无论是合成的还是重组的甲状旁腺激素制剂,都不能刺激高度纯化的破骨细胞群体的骨吸收。只有在污染成骨细胞或与成骨细胞样细胞系UMR‐106共培养时才会刺激吸收。在成骨细胞存在的情况下,PTHrP‐(1-34)和PTHrP‐(1-84)以剂量依赖的方式刺激骨吸收,其效力与PTH‐(1-34)在磨牙基础上相当。PTHrP的生物活性被证明存在于前34个氨基酸中,在该区域,促进破骨细胞吸收的结构要求与促进成骨样细胞中环状AMP形成的结构要求非常相似。用碘化PTHrP‐(1-34)和PTHrP‐(1-84)对新生大鼠混合骨细胞制剂进行乳化液放射自显影,证实仅与成骨细胞特异性结合,而不与破骨细胞特异性结合。这些结果清楚地表明,PTHrP是一种有效的骨吸收刺激物,并且这些作用与PTH一样,是通过对成骨细胞谱系的初始作用介导的。
Parathyroid hormone‐related protein (PTHrP) plays a major role in the syndrome of humoral hypercalcemia of malignancy (HHM) by its actions on bone and kidney. In this study an isolated osteoclast bone resorption assay was used to investigate the actions of this peptide and the structure‐activity relationships for its resorption effect. As with PTH, neither synthetic nor recombinant PTHrP preparations stimulated resorption within highly purified osteoclast populations. Resorption was stimulated only in the presence of contaminating osteoblasts or in cocultures with the osteoblastlike cell line UMR‐106. In the presence of osteoblasts PTHrP‐(1–34) and PTHrP‐(1–84) stimulated bone resorption in a dose‐dependent manner with a potency comparable to that of PTH‐(1–34) on a molar basis. The biologic activity of the PTHrP was shown to reside in the first 34 amino acids, and within that region the structural requirements for promotion of osteoclastic resorption resembled closely those for promotion of cyclic AMP formation in osteoblastlike cells. Using emulsion autoradiography with iodinated PTHrP‐(1–34) and PTHrP‐(1–84) on mixed bone cell preparations from neonatal rats, specific binding was demonstrated only to osteoblasts, not to osteoclasts. These results clearly demonstrate that PTHrP is a potent stimulator of bone resorption and that these effects are, like those of PTH, mediated by initial actions upon cells of the osteoblast lineage.
甲状旁腺激素相关蛋白的合成肽对啮齿动物体内和体外钙稳态、肾小管钙重吸收和骨代谢的影响。
DOI: 10.1172/jci113406
发表时间: 1988
期刊: The Journal of clinical investigation
影响因子: --
作者:
Yates,AJ;Gutierrez,GE;Smolens,P;Travis,PS;Katz,MS;Aufdemorte,TB;Boyce,BF;Hymer,TK;Poser,JW;Mundy,GR
通讯作者: Mundy,GR
人类肿瘤合成肽与甲状旁腺激素在体内和体外的相似性。
DOI: 10.1126/science.3685994
发表时间: 1987
期刊: Science (New York, N.Y.)
影响因子: --
作者:
Horiuchi,N;Caulfield,MP;Fisher,JE;Goldman,ME;McKee,RL;Reagan,JE;Levy,JJ;Nutt,RF;Rodan,SB;Schofield,TL
通讯作者: Schofield,TL
编码甲状旁腺激素样蛋白-(1-141)的基因的合成:表达蛋白的纯化和生物学表征。
DOI: 10.1210/endo-124-1-111
发表时间: 1989
期刊: Endocrinology
影响因子: 4.8
作者:
Thorikay,M;Kramer,S;Reynolds,FH;Sorvillo,JM;Doescher,L;Wu,T;Morris,CA;Burtis,WJ;Insogna,KL;Valenzuela,DM
通讯作者: Valenzuela,DM
人甲状旁腺激素(PTH)相关蛋白和人PTH:对人骨细胞和骨吸收的生物活性比较。
DOI: 10.1210/endo-123-6-2841
发表时间: 1988
期刊: Endocrinology
影响因子: 4.8
作者:
Fukayama,S;Bosma,TJ;Goad,DL;Voelkel,EF;TashjianJr,AH
通讯作者: TashjianJr,AH
DOI: 10.1016/s0021-9258(18)37641-5
发表时间: 1988-09
期刊: The Journal of biological chemistry
影响因子: --
作者:
Robert A. NissensonS;Dinh Diep;Gordon J. Strewlers
通讯作者: Robert A. NissensonS;Dinh Diep;Gordon J. Strewlers