Decellularized bladder as scaffold to support proliferation and functionality of insulin‐secreting pancreatic cells

Abstract

Loss in the number or function of insulin‐producing β‐cells in pancreatic islets has been associated with diabetes mellitus. Although islet transplantation can be an alternative treatment, complications such as apoptosis, ischaemia and loss of viability have been reported. The use of decellularized organs as scaffolds in tissue engineering is of interest owing to the unique ultrastructure and composition of the extracellular matrix (ECM) believed to act on tissue regeneration. In this study, a cell culture system has been designed to study the effect of decellularized porcine bladder pieces on INS‐1 cells, a cell line secreting insulin in response to glucose stimulation. Porcine bladders were decellularized using two techniques: a detergent‐containing and a detergent‐free methods. The resulting ECMs were characterized for the removal of both cells and dsDNA. INS‐1 cells were not viable on ECM produced using detergent (i.e., sodium dodecyl sulfate). INS‐1 cells were visualized following 7 days of culture on detergent‐free decellularized bladders using a cell viability and metabolism assay (MTT) and cell proliferation quantified (CyQUANT™ NF Cell Proliferation Assay). Further, glucose‐stimulated insulin secretion and immunostaining confirmed that cells were functional in response to glucose stimulation, as well as they expressed insulin and interacted with the detergent‐free produced ECM, respectively.

A hybrid construct of decellularized matrix and fibrin for differentiating adipose stem cells into insulin‐producing cells, an optimized in vitro assessment

“…Cell-ECM interactions could increase β cell survival and insulin secretion by activating the NF-κβ signaling pathway. 38 Varied ECM components like fibronectin, laminin, and collagen type IV found in decellularized tissues are vital in maintaining pancreatic β cell survival and insulin production. [38][39][40] Besides seeding on dAM, encapsulation in fibrin gel enhanced β cell markers in differentiated ASCs.…”

“…38 Varied ECM components like fibronectin, laminin, and collagen type IV found in decellularized tissues are vital in maintaining pancreatic β cell survival and insulin production. [38][39][40] Besides seeding on dAM, encapsulation in fibrin gel enhanced β cell markers in differentiated ASCs. This data was under the previous report in which the encapsulation of WJMSCs was associated with PDX-1, Nkx2.2, and insulin expression.…”