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Tissue Renewal without Stem Cells01:23

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After cellular or tissue damage, the resident stem cells present in the human body can locally repair and regenerate the damaged tissue or organ. However, even though some tissues do not have stem cells, they can repair and regenerate with the help of pre-existing cells. For example, beta cells of the pancreas and hepatocytes of the liver can divide to renew and regenerate the tissue. Here, both cell division and cell death are well regulated by homeostasis.
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Stem cell therapy is a method used in regenerative medicine to repair and restore function to damaged tissues and organs. Stem cells have the potential to proliferate and differentiate into various tissue types, making them ideal candidates for tissue regeneration. For example, hematopoietic stem cell transplants are commonly used in blood cancer treatment to replenish damaged bone marrow and restore healthy blood cells.
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Stem cells are undifferentiated cells that divide and produce more stem cells or progenitor cells that differentiate into mature, specialized cell types. All the cells in the body are generated from stem cells in the early embryo, but small populations of stem cells are also present in many adult tissues including the bone marrow, brain, skin, and gut. These adult stem cells typically produce the various cell types found in that tissue—to replace cells that are damaged or to continuously...
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Plant tissues are collections of similar cells performing related functions. Different plant tissues will have their own specialized roles and can be combined with other tissues to form organs such as flowers, fruit, stem, and leaves. Two major types of plant tissue include meristematic and permanent tissue.
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Embryonic stem (ES) cells are undifferentiated pluripotent cells, meaning they can produce any cell type in the body. This gives them tremendous potential in science and medicine since they can generate specific cell types for use in research or to replace body cells lost due to damage or disease.
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Embryonic stem (ES) cells were first discovered in mice in 1981 by Martin Evans. In 1998, James Thomson identified a method to isolate embryonic stem cells from humans. Human embryonic stem cells (hESCs) are obtained from 3-5 day old embryos that remain unused after an in vitro fertilization procedure.
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Treatment of Osteochondral Defects in the Rabbit's Knee Joint by Implantation of Allogeneic Mesenchymal Stem Cells in Fibrin Clots
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Stem Cells in Osteochondral Tissue Engineering.

Eleonora Pintus1, Matteo Baldassarri1, Luca Perazzo1

  • 1I Clinic of Orthopaedics and Traumatology, Rizzoli Orthopaedic Institute, Bologna, Italy.

Advances in Experimental Medicine and Biology
|April 26, 2018
PubMed
Summary
This summary is machine-generated.

A novel one-step arthroscopic technique utilizes bone marrow-derived cells for cartilage repair, bypassing laboratory processing. This method shows promising mid-term results for osteochondral repair, offering a potential future in regenerative medicine.

Keywords:
AnkleArthroscopyBone marrowCartilage repairStem cells

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Area of Science:

  • Orthopedics and Regenerative Medicine
  • Stem Cell Biology
  • Biomaterials Science

Background:

  • Mesenchymal stem cells (MSCs) are multipotent cells capable of differentiating into various connective tissues, including cartilage and bone.
  • Bone marrow-derived MSCs hold significant potential for osteochondral defect repair due to their differentiation capabilities.
  • Current cartilage repair methods often involve complex laboratory procedures for cell isolation and expansion.

Purpose of the Study:

  • To introduce and evaluate a novel one-step arthroscopic technique for cartilage repair using bone marrow-derived cells.
  • To assess the feasibility of processing bone marrow cells directly in the operating room, eliminating the need for a separate laboratory phase.
  • To investigate the efficacy of combining a cell scaffold with autologous platelet-rich fibrin (PRF) for enhanced cartilage regeneration.

Main Methods:

  • Development of a one-step arthroscopic surgical technique for cartilage repair.
  • Utilizing a device to concentrate bone marrow-derived cells intraoperatively.
  • Employing collagen powder or hyaluronic acid membranes as scaffolds, supplemented with autologous platelet-rich fibrin (PRF).

Main Results:

  • The technique allows for the transplantation of the entire bone marrow cellular pool, not just isolated MSCs.
  • Arthroscopic implantation is facilitated by a scaffold and instrumentation similar to those used in autologous chondrocyte implantation (ACI).
  • Mid-term results of this one-step technique are encouraging for osteochondral repair.

Conclusions:

  • The one-step arthroscopic technique offers a simplified approach to cartilage repair by enabling intraoperative processing of bone marrow cells.
  • The addition of PRF provides a supplemental source of growth factors, potentially enhancing the regenerative process.
  • While mid-term outcomes are promising, further long-term follow-up studies are necessary to fully ascertain the durability and efficacy of this approach.