What Are Progenitor Cells?
Progenitor cells are undifferentiated cells that can self-replicate and under appropriate cellular conditions develop into different cell types. There are two major subsets of progenitor cells, embryonic cells and adult cells. Cell based therapies utilizes primarily adult cells for cell-based treatments. These cells are distributed throughout the body and are found in every tissue. They reside in specific pockets of tissue called niches such as bone marrow, fat, synovial tissue and fluid and blood and are easily harvested. As we age, progenitor cells function to renew old or damaged cells. A prime example of this is our blood. Millions of blood cells expire every second and are replaced by hematopoietic progenitor cells found in our bone marrow. Adult cells like embryonic cells, can replicate into a limited number of different cell types.
Bone marrow and adipose tissue are easily accessible sources of progenitor cells (mesenchymal cells) in addition to other beneficial cell types and growth factors necessary to promote healing. Some of the more important components of bone marrow include:
- Mesenchymal Progenitor Cells: Are present within almost every tissue in the body, have ability to self-renew, can continue to divide for a length of time, can differentiate into specialized cells such as bone, cartilage, ligament, muscle, nerve, fat, connective tissue, cardiac, and liver cells.
- Hematopoietic Progenitor Cells: Hematopoietic stem cells reproduce all bloodlines and contain many of the biochemicals that modulate healing and tissue repair.
- Endothelial Cells: Endothelial progenitor cells stimulate angiogenesis and release important compounds
- Platelets
- Monocytes
- Fibroblasts
- Growth factors
- Interleukins
How Does PRP Compliment Progenitor Cell Therapies?
The combination of platelet rich plasma (PRP) and progenitor cell therapy may be considered for conditions that injuries are extensive, have been present for long periods of time, have a poor blood supply or involve structures that are exposed to repetitive stress and higher biomechanical loads such as tendon, ligament injuries, osteoarthritic or degenerative joints. There is an abundance of growth factors, cytokines and other bioactive proteins found in PRP that promote healing, trigger new tissue growth and enhanced the activity of progenitor cells. Studies have shown that the addition of PRP to progenitor cells, can further enhance tissue healing capabilities by reprogramming cellular response, decrease inflammation and improve the overall regenerative response. Dr. Podesta will evaluate each patient’s particular injury or condition and determine the most appropriate and effective treatment plan specific to your individual needs.
What Conditions Are Commonly Treated with Progenitor Cell Therapy?
Some of the conditions that might benefit from Progenitor Cell Based injections include:
Tendon injuries including:
- Rotator cuff tendinosis and partial tears
- Proximal and distal biceps tendinosis and partial tears
- Tennis elbow /Golfers’ elbow
- Gluteal tendinosis and partial tears
- Proximal hamstring tendinosis and partial tears
- Quadriceps/patella tendinosis and partial tears
- Achilles tendinosis and partial tears
- Peroneal and posterior tibial tendinosis and partial tears
- Plantar fasciiti
Ligament injuries such as:
- Elbow UCL partial tears
- Knee ACL, MCL
- Ankle sprains
Osteoarthritis of the:
- Shoulder
- Elbow
- Wrist
- Hip
- Knee
- Ankle and foot
- Cervical and Lumbar Spine
Muscle Injuries:
- Hamstring and quadriceps muscle pulls
- Calf muscle-Gastrocnemius muscle tears
Labral and meniscal tears:
Bone:
- Subchondral fractures
- Stress fractures
- Non-displaced fractures
How Are Progenitor Cells Harvested?
Dr. Podesta performs stem (progenitor) cell treatments in his office as an outpatient “point of care” procedure. He will first carefully withdraw a small amount of peripheral blood from a vein in your arm. The blood is then transferred and centrifuged to produce a predetermined tissue specific PRP formulation which take 15 to 25 minutes. Dr. Podesta will then reposition you and localize the posterior superior iliac crest using a musculoskeletal ultrasound device. Next, the target area on the posterior iliac crest will be anesthetized with a local anesthetic. Once the area is thoroughly anesthetized, a bone marrow aspiration needle will be advanced into the iliac crest. A small amount of bone marrow will then be painlessly withdrawn and placed into the centrifuge for processing for approximately 17 minutes. Dr. Podesta will then apply an antimicrobial dressing. The entire bone marrow harvest will take 15-20 minutes. An ice pack will then be applied to the aspiration site for 15 minutes to minimize bruising. When the bone marrow has completed its centrifugation process, it is removed and the PRP and bone marrow concentrate (BMC) are prepared for injection. The entire procedure will take approximately 45-60 minutes. Although most injuries can be effectively treated with a single injection, studies support a second treatment several months after the initial procedure depending on response to the initial treatment.
Most patients are extremely comfortable during the procedure, experience only minimal discomfort, and recover from the bone marrow aspiration and harvest in 2-3 days without any residual discomfort.