"Cell niches" are present in several human body tissues as a dynamic microenvironment essential to modulate stem cells' behavior in health, under injury, and in regenerative processes. The interplay between stem cells and their niche is necessary for sustaining tissues. The extracellular matrix (ECM) is the crucial component of the stem cell. It defines the architectural space, physical binding to the cell membrane, and interactions with the neighborhood cells and supports physical stress. Domains with nano or micrometric sizes define the surface and topology of the ECM, mediating cell interactions and macrophage recruitment to injured sites. Over the last two decades, the integration of biomedicine with other engineering and biomaterial sciences promoted the development of nanotechnology and regenerative medicine toward mimicking the specialized stem cell niches to treat diseases with less invasive and efficient therapies. Innovative approaches in nanotechnology, such as targeting the immunological system, transporting drugs across blood-brain/BBB and blood-retinal barriers/BRB, directing active moiety to specific disease location/organs, encapsulation of multiple components, and promoting signalization and pathway-specific surfaces for cell interactions and growth, are indeed promising. On the other side, developments of biomaterial scaffolds to mimic the cell niches for interactions with stem cells in vitro or in vivo have tremendous potential. The three-dimensional printing technology offers a base for a wide array of applications, for example, developing tissue constructs, mimetic organs, organoids, and organ-on-a-chip, thus avoiding the differences between animal model species and humans. Aiming closer to the natural environments, fresh autologous products from the blood, such as platelet-rich plasma (PRP), contain platelets and leukocytes, providing growth factors, cytokines, and proteins for the resident stem cells in the stages of regeneration. PRP also provides pain relief, reducing disabilities in elderly or diseased people. This book brings thought-provoking multidisciplinary topics on the diverse aspects of basic and applied sciences. The prime focus of the compilation is to understand the challenges researchers encounter in combining nanotechnology and regenerative medicine, ultimately integrating both disciplines for the benefit of the patient and offering them a ray of hope to be cured.

Platelet-Rich Plasma (PRP) has gained tremendous popularity in recent years as a treatment option for specialties including Orthopedics, Dentistry, Sports Medicine, Otorhinolaryngology, Neurosurgery, Ophthalmology, Urology, Vascular, Cardiothoracic and Maxillofacial Surgery, and Veterinarian Medicine. Nowadays, PRP and Stem Cell Science have added an exciting dimension to tissue repair.

This book begins by giving the reader a broad overview of current progress as well as a discussion of the technical aspects of preparation and therapeutic use of autologous PRP. It is followed by a review of platelet structure, function and major growth factors in PRP (PDGF and TGF ).The third chapter outlines the basic principles of biochemical cellular metabolism that increases the efficacy of PRP. Analogous to the preparation of soil for a garden, restoring cellular health should be the first consideration in Regenerative Medicine. Standardization of PRP preparation to clinical use still remains a challenging prospect. In this sense, a feasible strategy for studying PRP preparation is illustrated, which also allows to modulate and tailor the quality of PRP for further clinical applications.

The science behind PRP and stem cells, on tissue regeneration, cell proliferation and mesenchyme stem-cells are emphasized and reviewed. Various specific uses of PRP are described with detailed illustrations of various personal experiences mainly in orthopedic injuries, ligament and tendon repair, degenerative diseases, sports medicine, chronic wound healing as well as rehabilitation aspects in tendinopathy.

Expertly written by leading scientists in the field, this book provides for beginners and experienced readers scientific fundamentals, the state of art of PRP, specific uses and personal experiences with a practical approach and reference for current trends in use. Finally, this book paves the way for future developments."

Platelet-Rich Plasma (PRP) has gained tremendous popularity in recent years as a treatment option for specialties including Orthopedics, Dentistry, Sports Medicine, Otorhinolaryngology, Neurosurgery, Ophthalmology, Urology, Vascular, Cardiothoracic and Maxillofacial Surgery, and Veterinarian Medicine. Nowadays, PRP and Stem Cell Science have added an exciting dimension to tissue repair. This book begins by giving the reader a broad overview of current progress as well as a discussion of the technical aspects of preparation and therapeutic use of autologous PRP. It is followed by a review of platelet structure, function and major growth factors in PRP (PDGF and TGFβ).The third chapter outlines the basic principles of biochemical cellular metabolism that increases the efficacy of PRP. Analogous to the preparation of soil for a garden, restoring cellular health should be the first consideration in Regenerative Medicine. Standardization of PRP preparation to clinical use still remains a challenging prospect. In this sense, a feasible strategy for studying PRP preparation is illustrated, which also allows to modulate and tailor the quality of PRP for further clinical applications. The science behind PRP and stem cells, on tissue regeneration, cell proliferation and mesenchyme stem-cells are emphasized and reviewed. Various specific uses of PRP are described with detailed illustrations of various personal experiences mainly in orthopedic injuries, ligament and tend on repair, degenerative diseases, sports medicine, chronic wound healing as well as rehabilitation aspects in tendinopathy. Expertly written by leading scientists in the field, this book provides for beginners and experienced readers scientific fundamentals, the state of art of PRP, specific uses and personal experiences with a practical approach and reference for current trends in use. Finally, this book paves the way for future developments.