Tissue Engineering and Regenerative Medicine
Research Guide

Tissue engineering applies principles of biology and engineering to develop functional substitutes for damaged tissue, as defined in "Tissue Engineering" by Langer and Vacanti (1993). It addresses organ loss or failure, one of the most frequent health care problems. The field includes scaffolds, cells, and bioactive molecules to restore tissue function.

The International Society for Cellular Therapy established minimal criteria for multipotent mesenchymal stromal cells in "Minimal criteria for defining multipotent mesenchymal stromal cells. The International Society for Cellular Therapy position statement" by Dominici et al. (2006). These criteria include plastic adherence, specific surface marker expression, and differentiation potential into osteoblasts, adipocytes, and chondroblasts. These standards ensure consistent identification across studies.

Hydrogels serve as scaffold materials in tissue engineering by providing a hydrated environment for cell encapsulation and delivery, as reviewed in "Hydrogels for Tissue Engineering" by Lee and Mooney (2001). They mimic the extracellular matrix and allow control over mechanical properties and degradation rates. Applications include cartilage regeneration and vascular tissue formation.

Pluripotent stem cells, such as those induced from adult fibroblasts in "Induction of Pluripotent Stem Cells from Adult Human Fibroblasts by Defined Factors" by Takahashi et al. (2007), enable generation of patient-specific cells for tissue regeneration. Embryonic stem cell lines from human blastocysts, described by Thomson et al. (1998), maintain pluripotency and high telomerase activity for deriving various tissues. Mesenchymal stem cells, per Caplan (1991), differentiate into bone, cartilage, and other connective tissues.

The foreign body reaction to biomaterials involves macrophage fusion into giant cells and fibrous encapsulation, as detailed in "Foreign body reaction to biomaterials" by Anderson et al. (2008). This response limits long-term implant success in tissue engineering. Understanding protein adsorption and cellular interactions helps design scaffolds that minimize this reaction.

Myofibroblasts regulate connective tissue remodeling through mechano-sensing and contraction, according to "Myofibroblasts and mechano-regulation of connective tissue remodelling" by Tomasek et al. (2002). They produce extracellular matrix and generate forces for wound closure. Dysregulation contributes to fibrosis in regenerative medicine applications.