Understanding Artificial Chimerism
Artificial chimerism, as defined by certain studies and researchers, refers to the occurrence of chimerism resulting from transfusions of blood, stem cells, or bone marrow. In modern medical practices, artificial chimerism is relatively rare due to the use of radiation in treating blood. This radiation treatment enhances the recipient’s ability to assimilate the transplanted cells and decreases the chances of foreign cells persisting in the new host on a permanent basis. Given the infrequency of this particular type of chimerism, it is generally regarded by medical professionals as a subtype of microchimerism.
What are the Effects of Microchimerism?
The impact of microchimerism on our health is still largely unknown. While some scientists propose that the presence of foreign fetal cells might trigger a response similar to the rejection of a transplant, potentially leading to the development of autoimmune diseases, others believe these cells may serve as stem cells and contribute to the repair of damaged or diseased tissue. Interestingly, there is also a potential connection between microchimerism and breast cancer. In some cases, fetal immune cells have been found in the breast cancer stroma. However, it remains uncertain whether these cells are a cause of cancer or if they are attempting to prevent its occurrence, as suggested by the previous theory. Due to the scarcity of research on this subject, it is challenging to draw definitive conclusions.