The virus restructures infected cells to protect against antibody attacks. Scientists at the Albert Einstein College of Medicine have discovered that the virus causing chikungunya fever can spread directly from cell to cell—perhaps solving the longstanding mystery of how the virus, now emerging as
Researchers have discovered that the chikungunya virus can transmit directly from one cell to another through structures called intercellular long extensions . This discovery may explain the virus’s resilience against antibodies and could pave the way for new treatments.
Dr. Kielian and her colleagues have named these virus-induced structures intercellular long extensions, or ILEs. “This mode of viral transmission may not only shield some copies of the virus from the host’s immune response, but it may also explain why symptoms of chikungunya infection can persist for many months or years,” added first author Peiqi Yin, Ph.D., a postdoctoral fellow in Dr. Kielian’s lab.
To confirm this mode of cell-to-cell transmission in living animals, the researchers studied chikungunya infection in mice. Mice that were first inoculated with neutralizing antibodies and were then directly injected with chikungunya virus did not become infected. However, antibody-treated mice that were then injected with virus-infected cells did develop chikungunya infections that were resistant to the neutralizing antibodies.
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