Matrix metalloproteinase processing of PTHrP yields a selective regulator of osteogenesis, PTHrP(1-17).
Matrix metalloproteinase processing of PTHrP yields a selective regulator of osteogenesis, PTHrP(1-17).
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作者:
Frieling JS;Shay G;Izumi V;Aherne ST;Saul RG;Budzevich M;Koomen J;Lynch CC
Parathyroid hormone-related protein (PTHrP) is a critical regulator of bone resorption and augments osteolysis in skeletal malignancies. Here we report that the mature PTHrP1–36 hormone is processed by matrix metalloproteinases to yield a stable product, PTHrP1–17. PTHrP1–17 retains the ability to signal through PTH1R to induce calcium flux and ERK phosphorylation but not cyclic AMP production or CREB phosphorylation. Notably, PTHrP1–17 promotes osteoblast migration and mineralization in vitro, and systemic administration of PTHrP1–17 augments ectopic bone formation in vivo. Further, in contrast to PTHrP1–36, PTHrP1–17 does not affect osteoclast formation/function in vitro or in vivo. Finally, immunoprecipitation-mass spectrometry analyses using PTHrP1–17-specific antibodies establish that PTHrP1–17 is indeed generated by cancer cells. Thus, matrix metalloproteinase-directed processing of PTHrP disables the osteolytic functions of the mature hormone to promote osteogenesis, indicating important roles for this circuit in bone remodelling in normal and disease contexts.
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影响因子:
4.4
作者:
Anderson, NL;Anderson, NG;Pearson, TW
通讯作者:
Pearson, TW
影响因子:
6.6
作者:
Cramer, SD;Chen, ZX;Peehl, DM
通讯作者:
Peehl, DM
影响因子:
4.6
作者:
Cook LM;Araujo A;Pow-Sang JM;Budzevich MM;Basanta D;Lynch CC
通讯作者:
Lynch CC
DOI:
10.1124/jpet.112.199752
发表时间:
2013-06-01
影响因子:
3.5
作者:
Cupp, Meghan E.;Nayak, Surendra K.;Thomsen, William J.
通讯作者:
Thomsen, William J.
影响因子:
6.2
作者:
Jilka, RL;Weinstein, RS;Manolagas, SC
通讯作者:
Manolagas, SC