New Lyme Treatment

Research Funded by Bay Area Lyme Foundation Identifies New Investigatio

nal Therapy Regimen Capable of Irreversibly Damaging Lyme Bacteria in Laboratory Tests

“As Lyme disease is currently treated with broad spectrum antibiotics and there are no targeted treatments, we are particularly excited about this discovery, and hopeful that our novel Lyme disease therapeutic HS-291 will specifically destroy the Lyme bacterium without off-target effects or antibiotic resistance,”

"This new discovery has implications beyond Lyme disease as it demonstrates that using the drug HS-291 to deliver cellular toxins to HtpG, a type of non-essential enzyme that assists the folding or unfolding of large and complex proteins, greatly expands what can be considered druggable within any pathogen and opens a whole new area of infectious disease research."


When activated, HS-291, an inhibitor of HtpG tethered to the photoactive cellular toxin verteporfin, causes discrete protein modifications, which wreaks havoc on the Lyme disease bacterium’s DNA. This impacts multiple processes including nucleoid collapse and cell wall disruptions. A single dose of HS-291, when activated by light, irreversibly damages Borrelia proteins in close proximity of Bb HtpG in vitro.