Level 1 — Absolute Beginner
Scientists studied a group of bats called vesper bats. There are more than 500 kinds of vesper bats around the world.
The scientists found something new. These bats have two full sets of genes for making antibodies. Antibodies are things in the body that fight sickness.
No other mammal has ever been found with two full sets like this. Scientists say this is a completely new discovery.
This might explain why bats can carry dangerous viruses but do not get very sick. Scientists at Tulane University led the study, working with Stanford and the CDC.
- scientist
- a person who studies the natural world to learn new things
- antibody
- a protein made by the body to fight germs and sickness
- gene
- a part of the body's instructions that controls how living things grow
- mammal
- an animal that has warm blood and feeds milk to its babies
- virus
- a very small germ that can make people or animals sick
- discovery
- something new that is found or learned
- tolerate
- to be able to handle something without being badly harmed
- species
- a group of living things that are the same kind
Level 2 — Elementary
A team of researchers led by Tulane University, working with scientists from Stanford University and the Centers for Disease Control and Prevention, has discovered that vesper bats carry two separate, complete sets of antibody genes. Vesper bats belong to the largest bat family, with more than 500 species found on every continent except Antarctica.
The researchers examined 26 different bat species and found that each one had two full heavy-chain gene loci, the genetic regions responsible for producing antibodies, located on two different chromosomes. Both sets were shown to be functional and actively used by the bats' immune cells to build antibodies.
According to Hannah Frank, the study's lead researcher at Tulane, this kind of arrangement has never been documented in any mammal before. She said the discovery changes how scientists understand the way mammalian immune systems can be organized.
Vesper bats are famous among scientists for carrying viruses that would make most other mammals seriously ill, yet showing few symptoms themselves. The newly discovered double antibody system offers one possible explanation for that remarkable resistance, and the findings were published in the journal Science Advances.
- heavy-chain gene locus
- a specific location in the genome that contains genes for a part of an antibody
- chromosome
- a thread-like structure in cells that carries genetic information
- functional
- working properly and performing its intended purpose
- immune cell
- a cell in the body that helps fight infection and disease
- document
- to record or officially note something as true
- mammalian
- relating to mammals
- symptom
- a sign that a person or animal is unwell
- resistance
- the ability of a body to avoid being harmed by disease
Level 3 — Intermediate
A collaborative research effort led by Tulane University, in partnership with Stanford University and the Centers for Disease Control and Prevention, has uncovered an immune arrangement in vesper bats that has never before been documented in any mammal: two complete, independently functioning sets of antibody heavy-chain genes situated on separate chromosomes.
Vesper bats, taxonomically the family Vespertilionidae, constitute the largest bat lineage, encompassing more than 500 species distributed across every continent except Antarctica. By sequencing genomic data from 26 representative species, the research team confirmed that the duplicated gene loci were not vestigial remnants but were actively transcribed and translated into functioning antibodies by the bats' immune cells.
Hannah Frank, the study's corresponding author, described the finding as fundamentally altering assumptions about how mammalian immune systems can be structured, noting that redundant, fully operational antibody loci had simply never been observed in this class of animals before. The discovery adds a genetic dimension to a long-standing puzzle in virology and immunology.
Vesper bats have long attracted scientific interest for their capacity to host viruses, including several with pandemic potential in other species, while exhibiting minimal clinical symptoms themselves. The newly identified dual antibody system offers a compelling, though not yet fully proven, mechanistic explanation for this resilience, and the research was published in the peer-reviewed journal Science Advances.
- taxonomically
- in terms of scientific classification of living things
- lineage
- a line of descent or ancestry, especially in biology
- genomic
- relating to the complete set of genetic material of an organism
- vestigial
- no longer serving its original function, remaining only in reduced form
- transcribed
- copied from DNA into RNA as part of gene expression
- redundant
- no longer needed or useful because it duplicates something else
- virology
- the scientific study of viruses
- mechanistic
- explaining something in terms of the physical processes that cause it
Level 4 — Advanced
A multi-institutional research collaboration spanning Tulane University, Stanford University, and the Centers for Disease Control and Prevention has identified an immunogenetic architecture in vesper bats that upends a long-standing assumption about mammalian biology: the presence of two entirely independent, fully functional antibody heavy-chain gene loci residing on distinct chromosomes, a configuration never previously documented in any mammalian lineage.
Vesper bats, formally classified within the family Vespertilionidae, represent the most speciose bat lineage, comprising upward of 500 species distributed across every continent barring Antarctica. Through comparative genomic analysis of 26 representative species, the investigators established that the duplicated loci are not evolutionary vestiges but are actively expressed, contributing functional antibody diversity to the immune repertoire of these animals.
Corresponding author Hannah Frank characterized the discovery as compelling a wholesale reassessment of the structural possibilities inherent to mammalian immune organization, noting that redundant yet fully operative antibody loci had simply eluded detection across decades of comparative immunogenetic research. The finding introduces a novel genetic axis into the persistent puzzle surrounding bats' disproportionate capacity to serve as viral reservoirs.
Vesper bats have long occupied a peculiar niche in virological research, tolerating pathogens with demonstrated pandemic potential in other host species while manifesting negligible clinical pathology themselves. While the newly elucidated dual antibody architecture furnishes a plausible, mechanistically grounded hypothesis for this phenomenon, the authors are careful to note that causal confirmation will require further functional studies, a caveat consistent with the peer-reviewed publication's measured tone in Science Advances.
- immunogenetic
- relating to the genetic basis of the immune system
- speciose
- containing or comprising many species
- comparative genomic analysis
- the study of genetic material across different species to identify similarities and differences
- repertoire
- the range of things a system, such as the immune system, is capable of producing or doing
- reassessment
- a fresh evaluation of something previously understood in a certain way
- reservoir
- in biology, a host organism in which a pathogen can live and multiply
- pathology
- the observable damage or disease caused by an illness
- elucidate
- to make something clear; to explain
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