This Program Project """"""""Hormonal Control of Calcium Metabolism"""""""" brings together a group of highly productive investigators who work closely together, as they have for years, supported by the project and stimulated by the environment of the Endocrine Unit. Powerful research tools feature the approaches of chemical and molecular biology and a number of carefully designed genetically modified animals to evaluate bone and renal cell biology as well as mineral metabolism. Exciting medical translational applications have already been initiated from this work. Project I, """"""""Mechanisms of action of PTH ligands on the PTHR1 and implications in vivo"""""""" (Gardella PI), has led to the development of a new therapy for hypoparathyroidism (in collaboration with NIGH BrIDGs program), exciting new directions in peptide design including signal selective compounds and newer types of long-acting PTH molecules, as well as peptidomimetics (in collaboration with NlH's small molecule screening program MLPCN). Project II, """"""""PTH actions on cells of the osteoblast lineage"""""""" (Kronenberg PI), and Project III, """"""""Role of PTH/PTHrP receptor and RANKL in osteoblastic cells in vivo"""""""" (Divieti Pajevic PI), are independent but closely related projects that explore the cellular responses in bone to PTH employing powerful new techniques developed by the investigators to study the proliferation and differentiation of cells of the osteoblast lineage in vivo, roles of histone deacetylases in the cellular responses to bone anabolic actions of PTH and results of deletion of the PTH receptor in osteoblastic cells at varying stages of differentiation. This effort is fundamental to understanding how to improve the therapeutic response to PTH in fracture healing and in patients with osteoporosis. Project IV, """"""""PTH actions on renal target cells in the regulation of renal phosphate excretion"""""""" (Jueppner PI), examines key features of signal selectivity in PTH action, especially on renal phosphate transport and the desensitization of the cAMP/PKA pathway with chronic PTH exposure with the ensuing compensation by the IP3/PKC pathway, emphasizing the potential role of PTH ligands with enhanced IP3/PKC signaling in improving treatment in chronic renal disease (CKD).

Public Health Relevance

Great promise for closing gaps in knowledge about molecular mechanisms of parathyroid hormone action (PTH), PTH roles in bone and renal cell biology and calcium and phosphate homeostasis, and several important potential translational applications in osteoporosis, fracture healing and chronic renal disease.

Agency
National Institute of Health (NIH)
Institute
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
Type
Research Program Projects (P01)
Project #
2P01DK011794-46
Application #
8609111
Study Section
Special Emphasis Panel (ZDK1-GRB-J (O1))
Program Officer
Malozowski, Saul N
Project Start
1997-08-01
Project End
2018-11-30
Budget Start
2013-12-01
Budget End
2014-11-30
Support Year
46
Fiscal Year
2014
Total Cost
$1,732,389
Indirect Cost
$733,185
Name
Massachusetts General Hospital
Department
Type
DUNS #
073130411
City
Boston
State
MA
Country
United States
Zip Code
02199
Grigelioniene, Giedre; Nevalainen, Pasi I; Reyes, Monica et al. (2017) A Large Inversion Involving GNAS Exon A/B and All Exons Encoding Gs? Is Associated With Autosomal Dominant Pseudohypoparathyroidism Type Ib (PHP1B). J Bone Miner Res 32:776-783
Roszko, Kelly L; Bi, Ruiye; Gorvin, Caroline M et al. (2017) Knockin mouse with mutant G?11 mimics human inherited hypocalcemia and is rescued by pharmacologic inhibitors. JCI Insight 2:e91079
Mitchell, Deborah M; J├╝ppner, Harald; Burnett-Bowie, Sherri-Ann M (2017) FGF23 Is Not Associated With Age-Related Changes in Phosphate, but Enhances Renal Calcium Reabsorption in Girls. J Clin Endocrinol Metab 102:1151-1160
Li, Yuwen; Caballero, Daniel; Ponsetto, Julian et al. (2017) Response of Npt2a knockout mice to dietary calcium and phosphorus. PLoS One 12:e0176232
Leaf, David E; Jacob, Kirolos A; Srivastava, Anand et al. (2017) Fibroblast Growth Factor 23 Levels Associate with AKI and Death in Critical Illness. J Am Soc Nephrol 28:1877-1885
Knab, Vanessa M; Corbin, Braden; Andrukhova, Olena et al. (2017) Acute Parathyroid Hormone Injection Increases C-Terminal but Not Intact Fibroblast Growth Factor 23 Levels. Endocrinology 158:1130-1139
Guo, Jun; Khatri, Ashok; Maeda, Akira et al. (2017) Prolonged Pharmacokinetic and Pharmacodynamic Actions of a Pegylated Parathyroid Hormone (1-34) Peptide Fragment. J Bone Miner Res 32:86-98
Balani, Deepak H; Ono, Noriaki; Kronenberg, Henry M (2017) Parathyroid hormone regulates fates of murine osteoblast precursors in vivo. J Clin Invest 127:3327-3338
Kim, Sang Wan; Lu, Yanhui; Williams, Elizabeth A et al. (2017) Sclerostin Antibody Administration Converts Bone Lining Cells Into Active Osteoblasts. J Bone Miner Res 32:892-901
Ono, Noriaki; Kronenberg, Henry M (2016) Bone repair and stem cells. Curr Opin Genet Dev 40:103-107

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