Structural requirements for parathyroid hormone action in mature bone. Effects on release of cyclic adenosine monophosphate and bone gamma-carboxyglutamic acid-containing protein from perfused rat hindquarters.
Structural requirements for parathyroid hormone action in mature bone. Effects on release of cyclic adenosine monophosphate and bone gamma-carboxyglutamic acid-containing protein from perfused rat hindquarters.
复制标题
成熟骨中甲状旁腺激素作用的结构要求。
DOI:
--
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发表时间:
1985
影响因子:
15.9
通讯作者:
H. Heath
中科院分区:
文献类型:
--
作者:
M S Calvo;M J Fryer;K J Laakso;R. Nissenson;P A Price;T M Murray;H. Heath
To determine the structural requirements for parathyroid hormone (PTH) activity in mature bone, we perfused the surgically isolated hindquarters of adult male rats with either native bovine PTH-(1-84) [bPTH-(1-84)] or the synthetic amino-terminal fragment, bovine PTH-(1-34) [bPTH-(1-34)]. Changes in the release of cyclic AMP (cAMP) and bone Gla protein (BGP) were monitored as evidence of bone-specific response to PTH; tissue specificity of the cAMP response was confirmed through in vitro examination on nonskeletal tissue response to PTH. Biologically active, monoiodinated 125I-bPTH-(1-84) was administered to determine if mature murine bone cleaves native hormone. We found that perfused rat bone continuously releases BGP, and that both bPTH-(1-84) and bPTH-(1-34) acutely suppress this release. In addition, both hormones stimulate cAMP release from perfused rat hindquarters. When examined on a molar basis, the magnitude of the cAMP response was dose-dependent and similar for both hormones, with doses yielding half-maximal cAMP responses. The response for bPTH-(1-34) was 0.5 nmol and for bPTH-(1-84) was 0.7 nmol. Moreover, biologically active 125I-bPTH-(1-84) was not metabolized in our hindquarter perfusion system. These findings indicate that PTH-(1-84) does not require extraskeletal or skeletal cleavage to an amino-terminal fragment in order to stimulate cAMP generation in, or suppress BGP release from, mature rat bone.
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DOI:
10.1073/pnas.79.6.2061
发表时间:
1982
影响因子:
11.1
作者:
Pliam,NB;Nyiredy,KO;Arnaud,CD
通讯作者:
Arnaud,CD
DOI:
--
发表时间:
1980
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Price,PA;Baukol,SA
通讯作者:
Baukol,SA
DOI:
10.1016/s0021-9258(18)42960-2
发表时间:
1981-12
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
P. Price;M. Williamson;J. W. Lothringer
通讯作者:
P. Price;M. Williamson;J. W. Lothringer
DOI:
10.1210/jcem-52-5-840
发表时间:
1981
期刊:
The Journal of clinical endocrinology and metabolism
影响因子:
--
作者:
Nissenson,RA;Abbott,SR;Teitelbaum,AP;Clark,OH;Arnaud,CD
通讯作者:
Arnaud,CD
DOI:
--
发表时间:
1983
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Pillai,S;BottiJr,R;Zull,JE
通讯作者:
Zull,JE