25.36 : 组织移植

Tissue transplantation is a complex yet vital medical procedure that involves transferring cells, tissues, or organs from a donor to a recipient to restore lost functions.

This procedure relies heavily on the presence of MHC or HLA molecules, which are essential in distinguishing 'self' and 'non-self' cells.

These MHC molecules are unique to every individual due to the presence of multiple MHC proteins on cells, MHC gene polymorphism, and multiple alleles for each MHC locus.

So, finding a suitable donor whose MHC molecules match those of the recipient is a primary challenge. A successful transplant requires a match between at least 3–4 MHC molecules.

A mismatch between the MHC molecules of a donor organ and the recipient can trigger a cytotoxic T-cell response, often leading to transplant rejection.

Despite many challenges, the therapeutic potential of tissue transplantation is substantial. For instance, end-stage liver failure, heart failure, or diseases like Severe Combined Immunodeficiency are successfully treated through organ transplantation.