Understanding Antibody Diversity in Humans
Author Information
Author(s): Arnaout Ramy, Lee William, Cahill Patrick, Honan Tracey, Sparrow Todd, Weiand Michael, Nusbaum Chad, Rajewsky Klaus, Koralov Sergei B.
Primary Institution: Brigham and Women's Hospital
Hypothesis
What is the baseline diversity of V, D, J, and CDR3 repertoires in antibody heavy-chain genes in humans?
Conclusion
The study estimates that there are about 3–9 million unique heavy-chain CDR3s in the blood of an adult human.
Supporting Evidence
- The study found that V, D, and J segments are utilized with different frequencies, leading to a skewed representation of VDJ combinations.
- The pattern of segment usage was almost identical between the two individuals studied.
- Only 2% of VDJ combinations showed a statistically significant difference between productive and nonproductive rearrangements.
Takeaway
Scientists studied how diverse antibodies are in humans and found that while there are many possible types, only a few are used most of the time.
Methodology
The study used deep sequencing to analyze antibody heavy-chain VDJ-rearranged genes from two healthy male donors.
Potential Biases
Potential biases in PCR amplification could affect quantitation of antibody diversity.
Limitations
The study focused only on two individuals, which may not represent the entire human population.
Participant Demographics
Two healthy, genetically unrelated young adult male donors.
Statistical Information
P-Value
1.1×10−6
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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