Microbial parasitism cross-reactive with host antigen: implications concerning loss of "self" tolerance and...

Area of Science:

• Immunology
• Microbiology
• Genetic Engineering

Background:

• Contemporary understanding of immunologic tolerance to self antigens.
• Potential for autoreactive immune responses to microbial antigens.
• Role of microbial vectors in human parasitism.

Purpose of the Study:

• To discuss implications of inserting eukaryotic DNA into prokaryotic vectors.
• To analyze potential host autoreactive immune responses.
• To assess public health risks associated with recombinant DNA technology.

Main Methods:

• Review of immunologic tolerance concepts.
• Analysis of potential cross-reactivity between microbial and self antigens.
• Examination of risks posed by engineered microbial vectors.

Main Results:

• Eukaryotic genetic material in prokaryotic vectors may elicit autoreactive immune responses.
• Microbes sharing antigenic constituents with host self antigens pose a risk.
• Ongoing recombinant DNA technology could create similar vectors.

Conclusions:

• The overall risk to public health from such engineered microbial vectors is considered extraordinarily low.
• Careful consideration of antigenic similarities is crucial.
• Further research into host-microbe interactions is warranted.