Osteoarthritis (OA) is one of the most significant health problems of today’s time. Three dimensional culture models area major tool used by researchers to study cartilage degeneration associated with OA. The objective was to improve upon current 3D culture models. The hypothesis was that atelocollagen, when added to a hyaluronan matrix, enhances the chondrogenic development of bone-marrow derived mesenchymal stem cells (MSC). Additionally, these 3D cultures can be used to model inflammation-induced cartilage degradation. The experiment was organized into two phases. Phase I focused on the development of cartilage through the 3D culture of MSCs and Phase II, focused on the inflammation-induced degradation of the cultures. Conditioned mediums from naive and inflamed macrophages were added to the cultures after development and they were eventually processed for the purposes of histology and gene expression analysis. During Phase I, atelocollagen added to the hyaluronan matrix, significantly increased the gene expression of COLL II and decreased that of MMP13 when compared to hyaluronan alone, indicating improved matrix formation. This was reflected in histological analyses, as both the change in interstitial matrix and territorial matrix grade were greater in the cultures with atelocollagen. After inflammation exposure, there was a significant decrease in COLLII expression with a concomitant increase in MMP13 expression in both cultures indicating inflammation-induced degradation. Therefore, this new model of developing cartilage from MSC with hyaluronan and atelocollagen creates an articular cartilage model that acts like real cartilage in both healthy and damaged states.
Advances in Skin Aging: Delaying Skin Aging by Targeting Lymphoid-Derived IL-17 Pro-inflammatory Cytokine Signaling
Over the past decade, there have been many significant advances in the field of skin aging, including studies that explore the clearance of senescent (growth-arrested) cells in skin, regenerative therapeutics, and even 3D bioprinting of skin. One of the latest discoveries showed that blocking Interleukin 17 (IL-17) signaling leads to delays in the skin aging process. But how does IL-17, a pro-inflammatory cytokine, delay what has been known as the inevitable hallmarks of skin aging?
Press Release: Atelocollagen in 3D Culture Models Points to Treatment of Osteoarthritis
When it comes to the medical field, 3D modeling has previously been used to render anatomical images in greater detail in order to better understand bodily functions. Lately, however, 3D modeling has made waves in depicting diseases, with a focus on their severity and progression. Unlike a model depicting computer graphics, 3D culture models allow cells to interact in three dimensions and better display cell growth and movement, according to the Food and Drug Administration. Culture models are beneficial in replicating the complexities of disease by promoting interactions between cells and providing insight into potential solutions. In this issue of the Journal of Young Investigators, Priscilla Detwieler and her colleagues demonstrate that atelocollagen incorporated in a 3D model is shown to simulate a potential treatment for inflammation-induced osteoarthritis.