Scientists at Ca' Foscari University of Venice, in collaboration with researchers from Japan, China, Switzerland, and Italy, have developed an innovative method to produce and rapidly analyze a vast array of macrocyclic peptides, molecules increasingly used in modern medicine. The research, published in Nature Communications, harnesses the familiar brewer's yeast, turning billions of these tiny organisms into miniature fluorescent factories, each capable of creating a unique peptide with potential therapeutic applications.

Macrocyclic peptides are promising drugs because they combine precision targeting, stability, and safety, offering fewer side effects than traditional drugs. However, conventional methods for discovering and testing these peptides are often complex, difficult to control, slow, and environmentally unfriendly.

To overcome these limitations, the researchers engineered common brewer's yeast cells to individually produce different macrocyclic peptides. Each yeast cell acts like a tiny factory that lights up when prod-ucing the compound, allowing scientists to swiftly identify promising peptides. Using advanced fluorescence-based techniques, the team screened billions of these micro-factories in just a few hours, a process that is significantly faster and more ecofriendly than existing methods.

Sara Linciano, lead author and postdoctoral researcher at Ca' Foscari's Department of Molecular Sciences and Nanosystems, explains: "We manipulated yeast cells so that each one functions as a 'micro-factory' that becomes fluorescent when producing a specific compound. This allowed us to analyze 100 million different peptides rapidly and effectively."

Ylenia Mazzocato, co-leader of the study, highlights the sustainability of their approach: "By exploiting the natural machinery of yeast, we produce peptide molecules that are biocompatible and biodegradable, making them safe for health and the environment, a truly 'green pharma' approach."

The team also clarified how these peptides precisely bind to their targets. Zhanna Romanyuk, who contributed to the structural analysis, says: "Using X-ray crystallography, we demonstrated the excellent binding properties of these peptides, confirming their precision and potency."

This new method offers significant advancements for drug discovery, especially for challenging targets that conventional drugs cannot easily address. Alessandro Angelini, associate professor and study coordinator, emphasizes: "We are pushing the boundaries of this technology to create macrocyclic peptides that can deliver advanced therapies directly to specific cells, potentially revolutionising treatments. This could greatly benefit patient health and have substantial scientific and economic impacts."

This work was part of the National Recovery and Resilience Plan (PNRR), supported by the European Union's Next Generation EU initiative, involving multidisciplinary teams from Ca' Foscari University of Venice, Kyoto Institute of Technology (KIT), Chinese Academy of Sciences, University of Padova, and École Polytechnique Fédérale de Lausanne (EPFL), including experts in chemistry, biophysics, biochemistry, and computational sciences.

Part of this technology has already been patented by Ca' Foscari and was recently acquired by the startup Arzanya S.r.l. "Seeing our technology gain international recognition makes me proud," Angelini concludes. "I I hope Arzanya S.r.l. can provide our talented young researchers with the opportunity to pursue their passions here in Italy, without necessarily needing to move abroad."

Read more …Scientists turn beer yeast into mini factories for smart drugs

Bright colors, fruit imagery, and labels like "locally made" or "vegan" might seem harmless -- but when used on cannabis edibles, they can send misleading messages to teens.

That's according to a new Washington State University-led study examining how adolescents perceive the packaging of cannabis-infused products such as gummies, chocolates and sodas. Despite regulations barring packaging that targets youth, many teens in the study found these products appealing -- often likening them to everyday snacks or health foods.

The research, conducted in collaboration with Public Health - Seattle & King County, is part of a broader effort to reduce accidental cannabis exposure among teens. The findings could help shape new rules aimed at limiting underage appeal.

"What surprised us was how often these products were interpreted as healthy or natural," said Jessica Willoughby, associate professor in WSU's Murrow College of Communication and co- author of the study, published in the Journal of Health Communication. "When you combine that with vibrant packaging and familiar fruit flavors, it's easy to see how these items start to look like snacks -- not something potentially harmful or illegal for teens."

Researchers conducted virtual focus groups and interviews with 28 Washington teens, ages 13 to 17, using real product photos from stores to prompt discussion. With parental permission, participants shared which packaging elements caught their eye and why.

The teens consistently pointed to bright, colorful designs and packaging that resembled healthy snacks as particularly appealing. Some said they'd display the packaging in their rooms or use it in social media posts. Others said terms like "locally made" and "vegan" made the products feel more aligned with their personal values -- even if they knew the items contained cannabis.

"Our findings suggest that teens are drawn not just to the look of these packages, but to what the design represents," said Stacey Hust, a professor in WSU's Murrow College and the study's lead author. "They saw these products as trendy, natural and aspirational -- qualities that resonate with their identities and beliefs."

The study also showed that teens with greater familiarity with cannabis -- either through personal use or family exposure -- were more likely to notice warning labels and dosage information. Those with less knowledge often overlooked health warnings or didn't recognize cannabis symbols at all.

The results raise concerns for health educators and policymakers as cannabis edibles become more prevalent. The researchers recommend incorporating teen perspectives into regulatory discussions and increasing cannabis literacy through targeted education efforts.

"Teens are telling us what speaks to them -- and sometimes it's not what adults expect," said Sarah Ross-Viles, youth cannabis prevention manager with King County and study co-author. "If we're serious about making cannabis packaging less appealing to youth, we need to use their insights to guide smarter, more effective regulations."

The WSU team recently worked with Public Health - Seattle & King County health officials and the Washington State Liquor & Cannabis Board to conduct a follow-up quantitative study exploring how packaging elements correlate with perceived teen appeal and intent to use.

While broad changes like plain packaging may ultimately be difficult to implement, the researchers say practical updates -- such as clearer warnings and limiting branding that mimics health food -- could help reduce youth attraction.

"We're not calling for a marketing ban," Hust said. "We're asking for thoughtful regulations that balance the rights of adult consumers with the need to protect kids."

Ross-Viles agreed: "This is about ensuring cannabis packaging serves its real purpose -- informing adult consumers -- without confusing or enticing teens. And now, for the first time, we are getting direct feedback from Washington youth to help make that possible."

Read more …Candy colors, THC inside: How cannabis edibles are tricking teen brains

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