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Role of Ca2+ Signaling by 3D Osteocyte Networks in Mechanoadaptive Response of the Bone Multicellular Unit

Award Number: R01AR083466
ORGANIZATION: NATIONAL INSTITUTE OF ARTHRITIS & MUSCULOSKELETAL & SKIN DISEASES
OPDIV: NIH
AWARD CLASS: DISCRETIONARY
AWARD ACTIVITY TYPE: SCIENTIFIC/HEALTH RESEARCH (INCLUDES SURVEYS)
PERIOD OF PERFORMANCE START DATE: 08/15/2024
PERIOD OF PERFORMANCE END DATE: 07/31/2029

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Role of Ca2+ Signaling by 3D Osteocyte Networks in Mechanoadaptive Response of the Bone Multicellular Unit - Summary Osteocytes are the most numerous cell in bone tissue, which act as mechanosensors and coordinate adaptive bone remodeling. Current model systems have been unable to unify the mechanisms by which osteocytes to sense mechanical stimuli, transmit signals across an extensive 3D network, and how these transient signals drive adaptive bone remodeling by osteoblasts and osteoclasts. In this work, we will use a new bone multicellular unit (BMU) chip that enables longitudinal visualization of mechanosensitive calcium signaling across 3D osteocyte networks, enabling and characterization of the role of this signaling mechanism on the mechanoadaptive response of osteoblasts and osteoclasts in normal and injured states. Using BMU-chip, this work will test the hypothesis, ‘Discontinuity in 3D osteocyte networks alters mechanically-evoked calcium signal propagation which in turn modulates the spatiotemporal remodeling of effector cells’ using three specific aims. Aim 1 will define how Pulsed Unidirectional Fluid Flow Stimuli (PUFFS) modulates dynamic changes in calcium signaling across 3D network of osteocytes. Aim 2 will determine how 3D osteocyte networks subjected to PUFFS modulate direct and indirect signaling and osteoblastic bone formation and osteoclastic resorption activities. Aim 3 will identify how targeted disruption of 3D osteocyte networks influence calcium signaling and long-term functional outcomes. Completion of the proposed aims will provide a comprehensive understanding of how mechanically evoked calcium signaling across osteocyte networks modulates functional outcomes within the BMU in normal and injured conditions. Our team, with complementary expertise in biomedical engineering, bone cell biology, orthopedic surgery and statistical analysis is well suited to execute this project. In the future, BMU- chips could be utilized to probe other mechanotransduction pathways, and accelerate the development and evaluation of drugs to treat bone disease.


Issue Date FY	Funding FY	Legal Entity Name	Legal Entity Address	Legal Entity City	Legal Entity State	Legal Entity Zip Code	Legal Entity COUNTY	Legal Entity COUNTRY	Assistance Listing	Award Code	Budget Year	Action Date	Action Type	Action Amount

Issue Date FY: 2025 ( Subtotal = $290,571 )
2025	2025	SYRACUSE UNIVERSITY	900 S CROUSE AVE	SYRACUSE	NY	13244	ONONDAGA	USA	Arthritis, Musculoskeletal and Skin Diseases Research	000	2	7/21/2025	NON-COMPETING CONTINUATION	$290,571
														Subtotal = $290,571

Issue Date FY: 2024 ( Subtotal = $322,408 )
2024	2024	SYRACUSE UNIVERSITY	900 S CROUSE AVE	SYRACUSE	NY	13244	ONONDAGA	USA	Arthritis, Musculoskeletal and Skin Diseases Research	000	1	8/15/2024	NEW	$322,408
														Subtotal = $322,408

Grand Total All Awards = $612,979

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Role of Ca2+ Signaling by 3D Osteocyte Networks in Mechanoadaptive Response of the Bone Multicellular Unit

Award Number: R01AR083466

ORGANIZATION: NATIONAL INSTITUTE OF ARTHRITIS & MUSCULOSKELETAL & SKIN DISEASES

OPDIV: NIH

AWARD CLASS: DISCRETIONARY

AWARD ACTIVITY TYPE: SCIENTIFIC/HEALTH RESEARCH (INCLUDES SURVEYS)

PERIOD OF PERFORMANCE START DATE: 08/15/2024

PERIOD OF PERFORMANCE END DATE: 07/31/2029

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