Related Experiment Video
Updated: Feb 13, 2026
Measuring Bone Remodeling and Recreating the Tumor-Bone Microenvironment Using Calvaria Co-culture and Histomorphometry
Published on: March 14, 2020
Opening windows for bone remodeling through a SLIT
Jameel Iqbal1,2, Tony Yuen1, Se-Min Kim1
1Mount Sinai Bone Program, Icahn School of Medicine at Mount Sinai (ISMMS), New York, New York, USA.
Abstract:
Bone formation and resorption are tightly coupled, and dysfunction of either process leads to bone diseases, such as osteoporosis. Bone-forming agents have been explored clinically to increase bone density; however, long-term efficacy of these strategies is limited due to the accompanying increase in resorption in response to increased bone formation. Axonal guidance molecules have recently been shown to regulate formation-resorption coupling and thus have the potential for osteoporosis therapy. In this issue of the JCI, Kim et al. demonstrate that osteoclast-secreted SLIT3 influences bone formation and resorption by promoting osteoblast migration and suppressing osteoclast differentiation. Activation of SLIT3/ROBO signaling in ovariectomized mice increased bone mass, suggesting that SLIT3 should be further explored as a therapeutic target.
Insights
Scientists discovered that SLIT3, a molecule secreted by bone-resorbing cells, promotes bone formation and reduces bone breakdown. This finding offers a new therapeutic target for treating osteoporosis and other bone diseases.
Area of Science:
- Bone Biology
- Cell Signaling
- Osteoporosis Research
Background:
- Bone remodeling involves coupled processes of formation and resorption.
- Dysregulation of bone remodeling leads to diseases like osteoporosis.
- Current bone-forming agents have limited long-term efficacy due to increased resorption.
Purpose of the Study:
- To investigate the role of axonal guidance molecules in bone formation-resorption coupling.
- To explore SLIT3 as a potential therapeutic target for osteoporosis.
Main Methods:
- Investigated the function of osteoclast-secreted SLIT3.
- Examined SLIT3/ROBO signaling in ovariectomized mouse models.
- Assessed effects on osteoblast migration and osteoclast differentiation.
Main Results:
- Osteoclast-secreted SLIT3 promotes osteoblast migration.
- SLIT3 suppresses osteoclast differentiation, balancing bone remodeling.
- Activation of SLIT3/ROBO signaling increased bone mass in mice.
Conclusions:
- SLIT3 plays a crucial role in regulating bone formation and resorption coupling.
- SLIT3 represents a promising therapeutic target for osteoporosis.
- Further exploration of SLIT3 signaling is warranted for bone disease treatment.
Related Concept Videos
01:40Bone Remodeling
01:31Osteoclasts in Bone Remodeling
02:54Nucleosome Remodeling
Nucleosome remodeling complex
Eukaryotic cells have specialized enzymes called ATP-dependent nucleosome remodeling enzymes. These enzymes...
01:55Bone Structure
01:27Compact Bone
Compact bone, also called cortical bone, is the denser, stronger of the two types of bone tissue. It is found under the periosteum and in the diaphyses of long bones, where it provides support and protection. The microscopic structural unit of compact bone is called an osteon, or haversian system. Each osteon is composed of concentric rings of calcified...
01:29Bone Disorders
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...