Decision letter for "Non-enzymatic and Trophic Activities of Carboxypeptidase E Regulate Bone Mass and Bioenergetics of Skeletal Stem Cells in Mice"

2020 ◽  
Keyword(s):  
Stem Cells ◽  
Bone Mass ◽  
Carboxypeptidase E

scholarly journals Nonenzymatic and Trophic Activities of Carboxypeptidase E Regulate Bone Mass and Bioenergetics of Skeletal Stem Cells in Mice

JBMR Plus ◽  
2020 ◽  
Vol 4 (9) ◽  
Author(s):  
Amit Chougule ◽  
Vipula Kolli ◽  
Sudipta Baroi ◽  
Nabil Ebraheim ◽  
Piotr J Czernik ◽  
...  
Keyword(s):  
Stem Cells ◽  
Bone Mass ◽  
Carboxypeptidase E

Author response for "Non-enzymatic and Trophic Activities of Carboxypeptidase E Regulate Bone Mass and Bioenergetics of Skeletal Stem Cells in Mice"

2020 ◽  
Author(s):  
Amit Chougule ◽  
Vipula Kolli ◽  
Sudipta Baroi ◽  
Nabil Ebraheim ◽  
Piotr J. Czernik ◽  
...  
Keyword(s):  
Stem Cells ◽  
Bone Mass ◽  
Author Response ◽  
Carboxypeptidase E

scholarly journals Osteoblastic expansion induced by parathyroid hormone receptor signaling in murine osteocytes is not sufficient to increase hematopoietic stem cells

Blood ◽  
2012 ◽  
Vol 119 (11) ◽  
pp. 2489-2499 ◽  
Author(s):  
Laura M. Calvi ◽  
Olga Bromberg ◽  
Yumie Rhee ◽  
Jonathan M. Weber ◽  
Julianne N. P. Smith ◽  
...  
Keyword(s):  
Stem Cells ◽  
Parathyroid Hormone ◽  
Bone Mass ◽  
Hematopoietic Stem Cells ◽  
Trabecular Bone ◽  
Bone Matrix ◽  
Osteoblastic Cells ◽  
Hematopoietic Stem ◽  
Parathyroid Hormone Receptor ◽  
Mineralized Bone Matrix

Abstract Microenvironmental expansion of hematopoietic stem cells (HSCs) is induced by treatment with parathyroid hormone (PTH) or activation of the PTH receptor (PTH1R) in osteoblastic cells; however, the osteoblastic subset mediating this action of PTH is unknown. Osteocytes are terminally differentiated osteoblasts embedded in mineralized bone matrix but are connected with the BM. Activation of PTH1R in osteocytes increases osteoblastic number and bone mass. To establish whether osteocyte-mediated PTH1R signaling expands HSCs, we studied mice expressing a constitutively active PTH1R in osteocytes (TG mice). Osteoblasts, osteoclasts, and trabecular bone were increased in TG mice without changes in BM phenotypic HSCs or HSC function. TG mice had progressively increased trabecular bone but decreased HSC function. In severely affected TG mice, phenotypic HSCs were decreased in the BM but increased in the spleen. TG osteocytes had no increase in signals associated with microenvironmental HSC support, and the spindle-shaped osteoblastic cells that increased with PTH treatment were not present in TG bones. These findings demonstrate that activation of PTH1R signaling in osteocytes does not expand BM HSCs, which are instead decreased in TG mice. Therefore, osteocytes do not mediate the HSC expansion induced by PTH1R signaling. Further, osteoblastic expansion is not sufficient to increase HSCs.

scholarly journals Restoration of Bone Mass and Strength in Glucocorticoid-Treated Mice by Systemic Transplantation of CXCR4 and Cbfa-1 Co-Expressing Mesenchymal Stem Cells

2009 ◽  
Vol 24 (5) ◽  
pp. 837-848 ◽  
Author(s):  
Chun-Yang Lien ◽  
Kevin Chih-Yuan Ho ◽  
Oscar K Lee ◽  
Gordon W Blunn ◽  
Yeu Su
Keyword(s):  
Stem Cells ◽  
Mesenchymal Stem Cells ◽  
Bone Mass
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