STAT+: Study suggests mRNA vaccine could make humans resistant to ticks that transmit Lyme bacteria

Ticks, once latched onto a fleshy target with their barbed, needle-like mouths, are ready for almost anything. They glue themselves to the skin using a complex, cement-like substance. And then, like a “little pharmacological company,” they dole out proteins to keep the blood flowing, make it relatively painless, and hamper any immune response that might reveal their parasitic presence, Yale University researcher Erol Fikrig says.

It’s in those days of quiet blood-thirst that ticks pass along bacteria that causes conditions like Lyme disease, a growing problem driven in the U.S. by black-legged ticks (or Ixodes scapularis). Researchers have been trying for decades to understand just how the tiny tick is able to evade the human body’s defenses and pass along pathogens. 

A new study by Fikrig and other researchers, published Wednesday in Science Translational Medicine, uses a powerful monitoring system to reveal how the human immune system is responsive to a litany of tick triggers — some of which might be leveraged to create a protective mRNA vaccine. 

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