Robert Stefani Publishes New Functional Synovium-based Model of OA in Tissue Engineering Part A

Robert Stefani Publishes New Functional Synovium-based Model of OA in Tissue Engineering Part A

Robert Stefani publishes a novel in vitro tissue engineered synovium model, validated against native explants, to investigate the structure-function of synovium through quantitative solute transport measures. The synovium envelops the diarthrodial joint and plays a key regulatory role in defining the composition of the synovial fluid through filtration and biosynthesis of critical boundary lubricants. Synovium changes often precede cartilage damage in osteoarthritis, but the mechanism by which it may contribute to disease progression has not yet been elucidated. It is anticipated that this model will support efforts to develop more effective strategies aimed at restoring joint health.

Andy J. Lee Presents Research at BMES 2018

Andy J. Lee Presents Research at BMES 2018

CEL graduate student Andy Lee presented his research at the BMES Annual Meeting in Atlanta, Georgia. In his talk, titled “SB431542-Encapsulated Microspheres as a Strategy to Prevent Arthrofibrosis,” he discussed a novel approach to deliver a sensitive TGF-β inhibitor to the synovial capsule.

Clark T. Hung Co-Inventor of Award Winning Technology

Clark T. Hung Co-Inventor of Award Winning Technology

The Missouri Osteochondral Preservation System (MOPS) won the 2018 best technology in sports medicine award, presented by Orthopedics This Week. The technology significantly extends the life of tissue allografts, with the added benefits of the use of closed containers, serum-free media that includes dexamethasone, and the ability to be stored at room temperature. MOPS was developed by MTF Biologics in conjunction with Missouri Orthopedic Institute & ConMed, with CEL Director Clark T. Hung and former CEL doctoral student Eric Lima as co-inventors and engineers.

Saiti Halder Invited to Present at SciSymp2018 Conference

Saiti Halder Invited to Present at SciSymp2018 Conference

Saiti Halder, an undergraduate researcher in CEL, will be presenting her work at the Scientista Symposium Poster Fair and Competition in Times Square on April 14. The symposium is part of SciSymp18, which celebrates "Innovation in STEM - Scientistas Advancing the Field." Great job, Saiti!

CEL Team Presents at Orthopedic Research Society Meeting

CEL Team Presents at Orthopedic Research Society Meeting

Cellular Engineering Laboratory graduate students Robert Stefani and Eben Estell gave podium presentations at the Orthopedic Research Society Annual Meeting in New Orleans. Associate research scientist Dr. Andrea Tan, graduate student Jae Han Lee, and research assistant William Yu presented posters of their research during the meeting.

 Unwinding on the Bourbon Street balcony of Dr. Eddie Schwartz. Thank you for hosting us!

Unwinding on the Bourbon Street balcony of Dr. Eddie Schwartz. Thank you for hosting us!

CEL Hosts "Inside Engineering"

 
 

On Saturday, October 21, 2017, CEL hosted high school students from the Bridge to Enter Advanced Mathematics (BEAM) program as they learned about topics "Inside Engineering." With diabetes as a disease model, students were introduced to the potential for using hydrogel beads and capsules for therapeutic approaches to manage the disease. Students participated in a hands on experiment making solid alginate beads that can be used for cell or drug delivery.

Alginate is a biopolymer hydrogel that is able to crosslink internally and externally to form alginate beads and capsules. After this formation, alginate can be used to encapsulate cells which protects them from immune cells and release of cell products.

Sofia Barbosa and Lance Murphy Represent Columbia at International Seminar for Engineering Leaders

Sofia Barbosa '20 and Lance Murphy '18 attended the International Seminar for Engineering Leaders, held at Pontificia Universidad Católica de Chile in Santiago, Chile from September 24-30, 2017. They are two of three engineering undergraduates representing Columbia University at the conference, which was attended by 800 students from around the globe.

Sofia (mentored by Andrea Tan) and Lance (mentored by Eben Estell) gave an oral presentation on their lab research examining the effects of cell synchronization on cellular mechanotransduction and biosynthetic output in tissue engineered cartilage. 

Check out their introductory video, explaining their motivations for research and representing Columbia at the conference! 

Saiti Halder Presents Research at Science and Engineering Research Symposium

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Saiti Halder '19 (mentored by Rob Stefani) presented her summer research at the Annual Science and Engineering Research Symposium on September 28, 2017. Saiti shared our ongoing work in developing a tissue engineered synovium model with fellow students from the Undergraduate Scholars Program and faculty from the Engineering School.

Modeling Cellular and TIssue Specific Phenotypic Changes in Osteoarthritic Synovium Using a Tissue Engineered Co-Culture System

Osteoarthritis (OA) is a common disease, affecting more than 3 million people in the US per year. Although cartilage degeneration has been a key focus of OA research for years, recently there is growing appreciation for the intimate role that synovium plays in diarthrodial joint health. Despite the critical role of the synovium in governing joint homeostasis, there is surprisingly little known about the mechanisms that underlie this function. Previous research has led to the creation of tissue engineered synovium that primarily contains fibroblast-like synoviocytes (FLS). While it is clear that FLS are able to organize into a synovium-like architecture and perform other critical aspects of the native synovium, our previous research on native synovium explants has indicated that macrophages are a critical part of this model. In this project, we build upon the previous model by incorporating both macrophages and fibroblasts. Our results indicate that it is possible to co-culture FLS and macrophages in the same tissue engineered construct. To compare the behavior of the tissue engineered synovium to the native synovium, we treated the tissue engineered synovium with different inflammatory cytokines and anti-inflammatory drugs that we previously used to characterize the explants. It was observed that interleukin-1 and/or dexamethasone treatment differentially modulates FLS and synovial macrophage (SM) content in a tissue engineered synovium model.

Amy Silverstein Defends Her Thesis!

Thesis committee members included (left to right): Dr. Roshan Shah, Dr. Clark Hung, Dr. Gerard Ateshian, and Dr. Helen Lu. Dr. Bulinski not pictured.

CEL lab members celebrating Amy's defense (left to right): Clark Hung, Charlie Cai, Colden Lyons, Lance Murphy, Amy Silverstein, Evie Sobczak, Rob Stefani, Andrea Tan, Will Yu, Eben Estell, Saiti Holder, Krista Durney, Gerard Ateshian

Amy successfully defended her PhD thesis "Development of Biofidelic Culture Models of Osteoarthritis." Congratulations Dr. Silverstein!

Thesis Abstract: Osteoarthritis (OA) is a debilitating degenerative joint disease affecting 27 million Americans over the age of 25. Whereas OA is a disease of the entire joint organ, the contribution of the synovium, a specialized lining that envelops the knee joint, to cartilage degeneration and disease progression has been underappreciated. Synovial inflammation often precedes the development of cartilage damage and is observed in early and late stage OA. The onset of synovitis is driven by both elevated concentrations of pro-inflammatory cytokines and tissue debris in the joint space.  Accordingly, surgeons have observed cartilaginous debris embedded within the synovium of OA patients presenting with severe synovial hyperplasia.  It has been hypothesized that the fibrotic shortening of the synovial capsule results in OA pain and joint stiffness and contributes to further joint destruction through the release of degradative enzymes.  Current strategies to treat synovial inflammation and joint pain, such as intra-articular injections and synovectomy, have had limited and variable success.  

To this end, cell and tissue engineering culture models provide a versatile platform to study the tissues and cells involved in OA.  Our lab has typically employed mechanical overload or cytokine insult of chondrocytes and cartilage explants to study cartilage degradation.   Similarly, to isolate the role of synovium in OA, synovial explants or fibroblast-like synoviocytes (FLS) can be exposed to chemical or physical OA stimuli.  Although often overlooked as an instigator of OA, cartilage wear particles have been reported to induce synovial inflammation and OA-like joint changes in various animal models.  As opposed to non-biologic (metal or plastic) wear particles, small (sub-10mm) cartilage wear particles are comprised of extracellular matrix constituents that are degradable and may interact with cells beyond phagocytosis. Using cells derived from the pathologic joint provides the opportunity to study inherent changes to OA cells (both FLS and chondrocytes) within their own de novo extracellular matrix. The work presented in this dissertation aims to combine knowledge from basic science and pre-clinical culture models of OA to develop a clinically relevant disease model using cells derived from clinical samples. 

Intrepid Museum's Goals for Girls program visits CEL

A group of 25 9th-10th grade girls from NYC visited CEL to learn about Tissue Engineering and STEM at Columbia. After hearing a brief overview of CEL's work with cartilage repair and hydrogel systems, students participated in a hands-on lesson making different sized alginate beads by varying experiment parameters.