The disclosure provides methods and composition to build living tissue
covered stents and the like. These tissue coated stents provide a barrier
against cell migration to the lumen of the vessel. Since the tissue can
surround and envelope the stent, foreign body responses to the stent
material are reduced and delayed. The tissue coating is also relatively
impermeable to transmural flow, so the wrapped stent can act as a bypass
vessel. The tissue is also robust enough to act as a stand alone vessel,
without requiring the presence of the metallic stent. These stents can be
endothelialized to reduce thrombosis. The genetic modifications described
in this disclosure allow for functional organs to be built that express
agents that are anti-restenotic or anti-thrombogenic. The use of tissue
manipulation devices further allows for the assembly of complex tissue
engineered organs. The tissue manipulation devices provide a method of
anchoring the tissue sheets to the cell culture substrate to promote
prolonged maturation and subsequent increased mechanical strength. The
tissue manipulation devices also provide a technique to facilitate
removal of the sheet from the culture container and subsequent production
steps to assemble more complex three dimensional organs from the robust
sheet. The tissue manipulation devices also facilitate automated handling
of the sheets in the assembly processes.