Need for Tangible Methods for Clinical Translation

This chapter attempts to explore the reasons why, despite decades of progress in stem cell, effective treatments remain elusive. Over the past decade, research has extensively investigated the potential of mesenchymal stem cells (MSCs) to regenerate diverse tissues beyond their anticipated skeletal origins. This expanded the concept of MSCs to include their ability to differentiate into cell types derived from other embryonic layers, leading to the notion of MSCs as versatile “plastic” cells akin to embryonic stem cells. In vitro studies have reported the successful transformation of MSCs into various cell types using chemical cues, driving preclinical and clinical trials. However, these studies often lacked rigorous methods to validate genuine cellular transformation under artificial laboratory conditions and primarily relied on visual observations of cell behavior. The intricate interconnectedness and complexity of organisms, tissues, organs, and even individual cells raise fundamental questions about the extent to which the human body can be likened to a machine, where broken components can be easily replaced with spare parts. The idea that living entities are irreducible systems, with each part intricately coordinated with the whole, challenges the simplistic notion of mechanical repair. Despite ongoing research, a comprehensive theory explaining the functions of MSCs remains elusive. Current approaches fall short in fully elucidating their clinical applications, leaving many questions unanswered. New experimental findings, observations, and research may challenge or contradict the existing knowledge. To advance the field, developing a comprehensive theory that addresses these limitations and incorporates emerging evidence is essential. In closing, given the current interest in complexity science, this chapter proposes a novel perspective by theorizing that the dental pulp functions as a complex adaptive system.