A new skeletal tissue which has “immense potential” for regenerative medicine and tissue engineering has been identified by researchers.
The tissue, known as lipocartilage, is found in the ears, nose and throat of mammals and is composed of fat-filled cells called lipochondrocytes.
These cells provide stable internal support, allowing the tissue to remain both soft and elastic – similar to the qualities of bubble wrap.
This resilience makes lipocartilage an ideal candidate for future treatments of facial defects, birth injuries and cartilage-related conditions.
Dr. Richard Prince, an assistant professor at East Tennessee State University, says: “One of the techniques that enabled this exciting result was using nonlinear microscopy.
“Traditionally, microscopic imaging requires the use of large dyes or molecules, which can hinder studying small molecule metabolism such as glucose tracking. Here, we used dye-free, vibrational imaging to track the metabolism of glucose into lipid droplets, revealing the mechanism for lipocartilage formation.”
The discovery challenges longstanding assumptions in biomechanics and opens new avenues for innovative medical solutions, according to the University of California, Irvine, where the international study was based.
Unlike traditional cartilage, which relies on an external matrix for strength, lipocartilage derives its durability and elasticity from internal fat stores that remain constant regardless of food availability.
Lead author Raul Ramos says: “The discovery of the unique lipid biology of lipocartilage challenges long-standing assumptions in biomechanics and opens doors to countless research opportunities.
“Future directions include gaining an understanding of how lipochondrocytes maintain their stability over time and the molecular programs that govern their form and function, as well as insights into the mechanisms of cellular aging. Our findings underscore the versatility of lipids beyond metabolism and suggest new ways to harness their properties in tissue engineering and medicine.”