Your Entire Immune System Starts with One Cell
William Wallace, Director of Product Development and Scientific Affairs at ProHealth Longevity, posted on X:
”Your entire immune system starts with one cell.
Every red blood cell that carries oxygen
Every platelet that stops a cut from bleeding
Every neutrophil that attacks bacteria
Every T cell that hunts viruses
Every B cell that makes antibodies
All of them come from the same origin: a single pluripotent hematopoietic stem cell hidden inside your bone marrow.
What this stem cell can become
With the right signals from molecules like IL-3, GM-CSF, IL-7, SCF, and others, this stem cell divides and chooses a path:
• Red blood cells to deliver oxygen
• Platelets to form clots
• Neutrophils, eosinophils, and basophils to fight infection
• Monocytes and macrophages to clean up dead cells and debris
• B cells that produce IgG, IgA, IgM, and other antibodies
• T cells that orchestrate your immune defense
• Natural killer cells that recognize and destroy infected or malignant cells
Every branch in the diagram is a decision point based on the chemical signals surrounding the cell.
Why this matters
Your energy, your immunity, your ability to heal, and your resistance to infection depend on how well this system works.
When hematopoiesis is disrupted, it can lead to:
• anemia
• weakened immunity
• autoimmune problems
• slow healing
• susceptibility to infections
• blood cancers
Healthy blood begins with healthy stem cell signaling.
Inside your bone marrow, millions of stem cells are working every minute to build your immune system from scratch.
It is one of the most complex and elegant engineering systems in the human body.”
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