![]() ![]() After completion of the repair process, SCs will reestablish their numbers and quiescent state by homing back to highly specialized niches, thus allowing future rounds of regeneration. Upon injury, SCs will activate, proliferate, and differentiate to form new, or repair damaged, muscle. Responsible for this feature are the resident muscle stem cells, or satellite cells (SCs). A unique feature of the muscle tissue is its ability to regenerate in response to acute injuries over the course of a lifetime. The myofibers are embedded in a specific extracellular matrix (ECM), metabolically supported by a dense capillary network, and temporally coordinated by specialized neuronal inputs. Muscle contractions, the source of voluntary movement of our body, are produced by myofibers aligned, multi-nucleated cells with registered sarcomeric structures powering force generation. Skeletal muscle is a highly complex organ with robust contractile and regenerative capacity contributed to a variety of cell types and intra- and extracellular mechanisms. Finally, we will suggest the most promising methodologies that will enable continued progress in the field. The emphasis will be placed on the existing procedures to generate myogenic cell sources and form highly functional muscle tissues in vitro, techniques to monitor and evaluate muscle maturation and performance in vitro and in vivo, and surgical strategies to both create diseased environments and ensure implant survival and rapid integration into the host. In this review, we will discuss the methodologies that have progressed work in the muscle tissue engineering field to its current state. Recent advances in the field have resulted in the engineering of regenerative muscle constructs capable of survival, vascularization, and functional maturation in vivo as well as the first-time creation of functional human engineered muscles for screening of therapeutics in vitro. ![]() ![]() ![]() These tissues hold great promise for use in disease modeling and pre-clinical drug development, and have potential to serve as therapeutic grafts for functional muscle repair. For over two decades, research groups have been developing methods to engineer three-dimensional skeletal muscle tissues. ![]()
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