hiv/aids
Animal studies show potential for HIV vaccine strategy
Resilience and mutability have allowed HIV to dodge efforts to develop an effective vaccine for decades. But four Science studies describe new efforts at teaching the immune system — in mice and monkeys — to produce strong antibody responses that block many viral strains by exposing them to different vaccines.
In one study, researchers used engineered proteins to activate specialized B cells in rhesus monkeys so they produced antibodies that could latch onto the HIV virus. It's unclear whether these antibodies could actually protect against infection and disease — but it's an encouraging first step.
"In most vaccines, you're trying to get a common antibody response, it's kind of like if there's a jar of jelly beans and it has one gold — and that's the one you're trying to get," one of the study's authors told STAT. "But for a hard problem like HIV, instead of a jelly bean jar, you're trying to find that one gold jelly bean in a swimming pool."
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sec filings
What's new in fundraising
As a new Monday feature, we're highlighting interesting fundraises we found while trawling recent SEC filings.
Here's one: A stealth Boston-area startup called Progentos Therapeutics has raised an impressive $68.6 million. The CEO on file is Christopher Loose, a Yale entrepreneurship lecturer. Notably, he cofounded MIT spinout Frequency Therapeutics, which focused on reverse hearing loss, and also catheter company Semprus BioSciences with MIT's Robert Langer.
Progentos may be focused on multiple sclerosis, according to another SEC filing in March — showing that Progentos acquired the MS program from Frequency Therapeutics, which merged last year with Korro Bio. Loose was chief scientific officer of Frequency, which also had a preclinical remyelination program underway for multiple sclerosis.
Also of interest? Looks like Breakout Ventures is raising its third fund. We don't yet know how much, but the company has backed several founder-led biotech companies. Its second fund rolled out in 2021, using its $112.5 million to focus on "creative biosciences startups." Its first was in 2017, for $60 million.
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