Prothena Corporation plc Targets Rare Protein-Misfolding Disease In Late-Stage Study

Elan Corp. spinout Prothena Corp. will take an experimental drug aimed at a rare protein-misfolding disease into a late-stage clinical trial, the company said Tuesday.

Prothena (NASDAQ: PRTA), whose operations are largely based in South San Francisco, said it will focus its drug on amyloid light-chain amyloidosis, or AL amyloidosis, in what’s expected to be a 230-patient, Phase III study.

In the disease, misfolded amyloid proteins are deposited in tissue, causing progressive organ damage, including heart failure.

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