Rh sytem. Genetics and function

Area of Science:

• Genetics
• Immunology
• Hematology

Background:

• The Rh blood group system's genetic control remains largely unknown.
• The Rh antigen is a large protein with multiple antigenic determinants, encoded by a complex gene.
• The Rh system's evolution likely involved unequal crossover and mutation.

Purpose of the Study:

• To investigate the genetic control of the Rh system.
• To understand the function of the Rh antigen in red blood cell integrity.
• To analyze Rhnull blood to elucidate Rh gene function.

Main Methods:

• Analysis of Rhnull families.
• Genetic studies of the Rh gene complex.
• Investigation of red blood cell membrane properties.

Main Results:

• Rhnull families suggest unlinked control genes influencing Rh structural gene function.
• Rhnull cells exhibit abnormalities, including increased Na+K+ pumps.
• A direct link between Rhnull cell abnormalities and the absence of Rh antigens was not established.

Conclusions:

• Unlinked genes play a role in regulating Rh antigen expression.
• The precise function of Rh antigens in maintaining red blood cell integrity requires further investigation.
• Rhnull red blood cell abnormalities are not definitively explained by the lack of Rh antigens alone.