A new study has generated one of the most comprehensive spatially resolved transcriptome maps of cellular communication between bone and skeletal muscle in young mice. Researchers used spatial transcriptomics, computational deconvolution, and ligand-receptor network analysis to identify signaling pathways that coordinate tissue maintenance, remodeling, and vascular support. Significant interactions involving the collagen, thrombospondin, tenascin, and VEGF pathways were experimentally validated across independent datasets. This discovery provides a basis for studying musculoskeletal diseases and aging.
Bone and skeletal muscle are often seen as separate tissues with different functions, but they function as a highly integrated system. They simultaneously support movement, maintain posture, regulate metabolism, and help maintain overall health. Scientists have long known that bones and muscles communicate through biochemical signals, but understanding exactly where these molecular conversations take place and which cells participate remains a major challenge. Traditional genomic techniques can identify which genes are expressed within a tissue, but often lose the spatial information needed to understand how neighboring cells interact in their natural environment.
The research team tackling this challenge was led by Professor Hongwen Deng, director of the Tulane Center for Biomedical Informatics and Genomics, Deming School of Medicine, Tulane University School of Medicine, USA. The researchers applied spatial transcriptomics, an emerging technology that directly maps gene activity within intact tissue, to examine the mouse femur and adjacent skeletal muscle. By combining this approach with advanced computational tools, they reconstructed cellular neighborhoods and communication networks across the bone-muscle interface. This analysis generated data from 2,660 spatial spots and identified multiple major cell populations involved in tissue communication. Their findings were published in Volume 14 of the journal. bone research May 19, 2026.
This research reveals that bone and muscle are connected through a surprisingly complex communication system involving osteoblasts, skeletal muscle cells, endothelial cells, immune cells, and stem cell populations. Researchers have identified 13 major signaling pathways that coordinate tissue maintenance and remodeling. Some of these pathways involve extracellular matrix proteins and growth factors that help cells exchange information, regulate structural integrity, and respond to physiological demands. This finding suggests that intertissue communication is not random but organized into distinct spatial networks formed by the local cellular environment.
One of the most important findings of this study was the identification of specific ligand-receptor pairs that function as molecular messengers between adjacent cells. These include collagen-related signaling between osteoblasts and myocytes, thrombospondin-mediated communication involving immune cells, and vascular endothelial growth factor (VEGF)-driven signaling that supports vascular function. Laboratory imaging confirmed the predicted colocalization of several molecular partners within the tissue, increasing confidence in the computational predictions. Additional validation using independent mouse and human datasets corroborated many of the identified pathways and suggested that some communication mechanisms may be shared between species.
“Our goal was to go beyond simply identifying which genes are present to understanding how cells communicate within their native tissue environment.” Professor Deng Xiao explained: ”By preserving spatial information, we were able to uncover communication networks that were difficult to detect using traditional sequencing methods alone. ”
This research also provides important opportunities for future collaborations across areas such as bone biology, muscle physiology, regenerative medicine, aging research, bioinformatics, and precision medicine. Because diseases such as osteoporosis, sarcopenia, and metabolic diseases often involve simultaneous deterioration of bone and muscle, a clearer understanding of tissue crosstalk could help researchers identify common therapeutic targets. In the short term, this study provides a valuable reference map that scientists can use to investigate how these signaling networks change during injury, aging, or disease progression.
“Understanding these cellular communication pathways provides a framework for studying what goes wrong in musculoskeletal diseases.” said Professor Deng Xiao.In the future, this knowledge could help develop targeted interventions that restore healthy communication between organizations. ”
Overall, this study provides one of the first spatially resolved transcriptome-wide maps of bone-muscle communication. This study establishes the foundation for future research into musculoskeletal health and disease by revealing how cells coordinate their activities through organized signaling networks. In the long term, such insights may contribute to more accurate diagnostic tools, improved regenerative therapies, and personalized treatment strategies aimed at preserving mobility and quality of life in an aging population.
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Reference magazines:
Qiu, C. Others. (2026) Decoding cellular communication networks and signaling pathways in bone, skeletal muscle, and osteomuscle crosstalk by spatial transcriptomics in young male mice. bone research. DOI: 10.1038/s41413-026-00520-w. https://www.nature.com/articles/s41413-026-00520-w
