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Research for the mechanisms of anabolic action of parathyroid hormone(PTH) on bone and interaction between PTH and estrogen in osteoblasts

Research Project

Project/Area Number 14571064
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Endocrinology
Research InstitutionKobe University

Principal Investigator

SUGIMOTO Toshitsugu  Kobe University, Graduate School of Medicine, Associate Professor, 大学院・医学系研究科, 助教授 (00226458)

Co-Investigator(Kenkyū-buntansha) CHIHARA Kazuo  Kobe University, Graduate School of Medicine, Professor, 大学院・医学系研究科, 教授 (00107955)
Project Period (FY) 2002 – 2003
Project Status Completed (Fiscal Year 2003)
Budget Amount *help
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2003: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2002: ¥2,400,000 (Direct Cost: ¥2,400,000)
KeywordsParathyroid hormone / Estrogen / Osteoblast / Bone formation / TGFβ / Smad-3 / Apoptosis / Insulin-like growth factor I / Insulin-like growth factor-binding protein-5
Research Abstract

Although several studies indicated that parathyroid hormone (PTH) exerted anabolic action on bone and estrogen augmented its anabolic action on bone, their precise mechanisms have been unknown. TGFβ stimulates bone formation in vivo and regulates the transcriptional response of the target genes through the two receptor -regulated Smads, Smad2 and Smad3. Our study revealed that Smad3 was an important molecule for bone formation. Next, we examined the effects of PTH on Smad3 and its physiological significance in osteoblasts. PTH promoted Smad3 mRNA and protein levels though PKA and PKC pathways in mouse osteoblastic MC3T3-E1 cells and rat osteoblastic UMR-106 cells. We, next, examined anti-apoptotic effects of PTH and Smad3. Pretreatment with PTH or overexpression of Smad3 decreased the number of apoptotic cells induced by dexamethasone or etoposide. Moreover, a dominant negative mutant, Smad3deltaC, abrogated PTH-induced anti-apoptotic effects. On the other hand, PTH augmented TGFβ-indu … More ced transcriptional activity of Smad3. Furtheremore, PTH enhanced TGFβ-induced production of type1collagen. These observations indicate that PTH amplified the anabolic effects of TGFβ by accelerating the transcriptional activity of Smad3. We first demonstrated that PTH-Smad3 axis exerts anti-apoptotic effects and reinforces the anabolic action by TGFβ in osteoblasts. There is recent evidence about the importance of Wnt signaling in bone formation and we obtained data about stimulatory effects of PTH and Smad3 overexpression on β-catenin expression in osteoblasats. Hence, PTH-Smad-3 axis would be involved in bone anabolic action of PTH. As for studies about the interaction between PTH and estrogen in osteoblasts, estrogen attenuated PTH-induced inhibition of osteoblast proliferation and PTH stimulated osteoblast function in the presence of estrogen pretreatment in human osteoblastic SaOS-2 cells. And, IGF-I and/or IGF-binding protein-5 were involved in the estrogen-induced modulation of PTH action on osteoblast proliferation and function. Less

Report

(3 results)
  • 2003 Annual Research Report   Final Research Report Summary
  • 2002 Annual Research Report
  • Research Products

    (30 results)

All Other

All Publications (30 results)

  • [Publications] Sugimoto T: "Effect of low-dose of recombinant human growth hormone on bone metabolism in osteoporosis women"Eur J Endocrinol. 147. 339-348 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Sowa H: "Activations of ERK1/2 and JNK by TGFβ Negatively Regulate Smad3-induced Alkaline Phosphatase Activity and Mineralization in Mouse Osteoblastic Cells"J Biol Chem. 277. 36027-36031 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Jonsson KB: "Fibroblast Growth Factor 23 in Oncogenic Osteomalacia and X-Linked Hypophosphatemia"N Engl J Med. 348. 1656-1663 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Sowa H: "Inactivation of menin, the product of the multiple endocrine neoplasia type1(MEN1) gene, inhibits the commitment of multipotential"J Biol Chem. 278. 21058-21069 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Chen Q: "Effects of an excess and a deficiency of endogenous PTH on volumetric bone mineral density and bone geometry by PQG in female subjects"J Clin Endocrinol Metab. 88. 4655-4658 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Sowa H: "Parathyroid hormone-Smad3 axis exerts anti-apoptotic action and augments anabolic action of transforming growth factor beta in osteoblasts"J Biol Chem. 278. 52240-52252 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 杉本利嗣: "骨粗鬆症診療実践マニュアル副甲状腺ホルモン"文光堂. 253 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Sowa T, Kaji H, Yamaguchi T, Sugimoto T, Chihara K.: "Smad3 promotes alkaline phosphatase activity and mineralization of osteoblastic MC3T3-E1 cells."Bone Miner Res. 17. 1190-1199 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Sugimoto T, Kaji H, Nakaoka D, Yamauchi M, Yano S, Sugishita T, Baylink D, Mohan S, Chihara T.: "Effect of low-dose of recombinant human growth hormone on bone metabolism in elderly osteoporotic women."Eur J Endocrinol. 147-3. 339-348 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Sowa H, Kaji H, Yamaguchi T, Sugimoto T, Chihara K.: "Activation of ERK1/2 and JNK by transformong growth factor β negatively regulate smad3-induced alkaline phosphatase activity and mineralization in mouse osteoblastic cells."J Biol Chem. 277-6. 36024-36031 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Yano S, Sugimoto T, Tsukamoto T, Yamaguchi T, Hattori T, Kaji H, Hattori S, Kobayashi A, Chihara K.: "Effect of parathyroidectomy on bone mineral density in hemodialysis patients with secondary hyperparathyroidism : possible usefulness of preoperative determination of parathyroid hormone level for prediction of bone region."Horm Metab Res. 35-4. 259-264 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Jonsson KB, Zahradnik R, Larsson T, White KE, Sugimoto T, Imanishi Y, Yamamoto T, Hampson G, Koshiyama H, Liuggren O, Oba K, Yang IM, Miyauchi A, Econs MJ, Lavigne J, Juppner H.: "Fibroblast growth factor 23 in oncogenic osteomalacia and X-linked hypophosphatemia."N Engl J Med. 348-17. 1656-1663 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Sowa H, Kaji H, Canaff L, Hendy GN, Sugimoto T, Chihara K.: "Inactivation of menin, the product of the multiple endocrine neoplasia type 1(MEN1) gene, inhibits the commitment of multipotential mesenchymal stem cells into the osteoblast."J BIol Chem. 278-23. 21058-21069 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Chen Q, Kaji H, Iu MF, Nomura R, Sowa H, Yamauchi M, Tsukamoto T, Sugimoto T, Chihara K.: "Effects of an excess and a deficiency of endogenous PTH on the volumetric bone mineral density and bone geometry by pQCT in female subjects."J Clin Endocrinol Metab. 88-10. 4655-4658 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Bastepe M, Frohlich LF, Hendy GN, Indridason OS, Josse RG, Koshiyama H, Korkko J, Nakamoto JM, Rosenbloom AL, Slyper AH, Sugimoto T, Tsatsoulis A, Crawford JD, Juppner H.: "Autosomal dominant pseudohypoparathyroidism-ib is associated with a heterozygous microdeletion that likely disrupts a putative imprinting control element of GNAS."J Clin Invest. 112. 1255-1263 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Sowa H, Kaji H, Iu MF, Tsukamoto T, Sugimoto T, Chihara K.: "Parathyroid hormone-Smad3 axis exerts anti-apoptotic action and augments anabolic action of transforming growth factor beta in osteoblasts."J Biol Chem. 278-52. 52240-52252 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Jonsson KB: "Fibroblast growth factor 23 in oncogenic osteomalacia and X-linked hypophosphatemia"N Engl J Med. 348・17. 1656-1663 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Kanatani M: "Effect of high phosphate concentration on osteoclast differentiation as well as bone-resorbing activity"J Cell Physiol. 196. 180-189 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Sowa H: "Inactivation of menin, the product of the multiple endocrine neoplasia type 1 (MEN1) gene, inhibits the commitment of multipotential mesenchymal stem cells into the osteoblast lineage"J Biol Chem. 278・23. 21058-21069 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Chen Q: "Effects of an excess and a deficiency of endogenous parathyroid hormone on volumetric bone mineral density and bone geometry determined by peripheral quantitative computed tomography in female subjects"J Clin Endocrinol Metab. 88・10. 4655-4658 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Bastepe H: "Autosomal dominant pseudohypoparathyroidism type Ib is associated with a heterozygous microdeletion that likely disrupts a putative imprinting control element of GNAS"J Clin Invest. 112. 1255-1263 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Sowa H: "Parathyroid hormone-Smad3 axis exerts anti-apoptotic action and augments anabolic action of transforming growth factor beta in osteoblasts"J Biol Chem. 278・52. 52240-52252 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 杉本利嗣: "内科学(第2版)副甲状腺機能低下症"文光堂. 2340 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Sowa H: "Smad3 promote alkaline phosphatase activity and mineralization of osteoblastic MC3T3-E1 cells"J Bone Miner Res. 17. 1190-1199 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Sugimoto T: "Effect of low-dose recombinant human growth hormone on bone metabolism in with osteoporotic women"Eur J Endocrinol. 147. 339-348 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Yamauchi M: "Familial hypocalciuric hypercalcemia caused by an R648 stop mutation in the calcium-sensing receptor gene"J Bone Miner Res. 17. 2174-2182 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Sowa H: "Activation of ERK1/2 and JNK byTGFβ negatively ragylate Smad3-induced Alkaline Phosphatase activity and Mineralization in mouse Osteoblastic cells"J Biol Chem. 277・6. 36024-36031 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Yamaguchi T: "The extracellular calcium-sensing receptor is expressed in myelomacolls and modulates cell proliferation"Biochem Biophy Res Commun. 299・4. 532-538 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Yano S: "Effect of parathyroidectomy on bone mineral density in hemodialysis patients with secondary hyperparathyroidism"Horm Metab Res. (in press).

    • Related Report
      2002 Annual Research Report
  • [Publications] 杉本利嗣: "新しい診断と治療のABC 骨粗鬆症"最新医学社. 247 (2002)

    • Related Report
      2002 Annual Research Report

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Published: 2002-04-01   Modified: 2016-04-21  

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