Basic Course in Pediatric Heart Failure and Heart Transplantation – Niakoro

Basic Course in Pediatric Heart Failure and Heart Transplantation

Basic Course in Pediatric Heart Failure and Heart Transplantation

Course Content

Total learning: 67 lessons / 6 quizzes Time: 8 hours

Human leucocytes antigen (HLA)

What are HLA?

Human Leucocyte Antigens (HLA) are the cell surface proteins that play a fundamental roll in the immune response.

Major histocompatibility complex (MHC): They are clusters of genes on the short arm of  chromosome 6 expressed on the cell surface as HLA i.e.  genes that encode HLA.

Where are HLA expressed?

  • class1 – HLA- A,B,C present in all nucleated cells (ubiquitous). CD8+ recognizes class 1 HLA
  • class2 – HLA- DR, DP, DQ: present only on antigen-presenting-cells (APC) e.g., dendritic cells, monocytes, macrophages, B lymphocytes

Which is the Function of HLA?

Selection of T cell repertoire and initiation of T cell dependent immune response

They act as antigen recognition unit on T-lymphocytes and are the major trigger for graft rejection

  • Class 2- HLA-DR are most important in rejection
  • CD4+ recognize class 2 HLA

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