Evolutionary ‘arms race’ may help keep cell division honest
Research from the lab of Michael Lampson in the School of Arts & Sciences suggests that certain proteins may have evolved to reduce the likelihood of chromosomes “cheating” to bias their chance of winding up in an egg during the cell-division process meiosis.
School of Veterinary Medicine postdoc Lauren Powell’s research illuminates how the personalities of both dogs and their owners influence the pairs’ ability to overcome behavioral challenges.
The parasite Cryptosporidium, a leading global cause of diarrheal diseases in children, injects host cells with a cocktail of proteins. Using powerful video microscopy, School of Veterinary Medicine researchers tracked the process in real time.
New findings reveal the varied roles of a key protein in cell division. When the protein Meikin is not properly cleaved before meiosis II, chromosomes do not align properly, causing problems in cell division (bottom image). Chromosomes are in blue and the cellular machinery that pulls them to opposite sides of the cell is in purple. (Image: Jun Ma)
Rewiring cell division to make eggs and sperm
Research by the School of Arts & Sciences’ Michael Lampson and Jun Ma, collaborating with Whitehead Institute researchers, reveals how a key protein enables the process of meiosis to unfold.
Rising senior Alejandra Bahena conceived of an event to bring together, educate, and inspire students planning for a career in health care. The resulting Pre-Health Conference is being held for the second year in a row beginning Aug. 4. (Image: Courtesy of Alejandra Bahena)
Support and inspiration for undergrads pursuing careers in health care
The three-day-long National Pre-Health Conference, the brainchild of rising senior Alejandra Bahena, begins Aug. 4.
Time-lapsed fluorescence imaging captures how fungi can be killed precisely. Such approaches can improve how tooth decay-causing biofilms might be targeted. (Image: CiPD)
New engineering approaches to address unmet oral health needs
With a new NIH training grant, awards, and new faculty and publications, the recently launched Center for Innovation & Precision Dentistry is leveraging technological advancements to improve oral health.
Jeff Gerber, who is heading the clinical trial of the Moderna vaccine in kids under 12 at CHOP, speaks with Penn Today about the trial and why getting children vaccinated is so essential.
A mysterious condition is affecting common backyard bird species, including blue jays, causing them to become sick and sometimes perish.
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The search for the culprit behind songbird deaths
Across the United States, songbirds are dying from a mysterious condition. Working with long-established partners, researchers at the School of Veterinary Medicine are striving for a diagnosis.
Hyenas benefit from being born to high-ranking mothers, from whom they inherit their social networks, according to research led by biologists from Penn and Michigan State University. (Image: Kate Shaw Yoshida)
High-ranking hyena mothers pass their social networks to their cubs
Using 27 years of detailed data on hyena social interactions, a team led by Penn biologists nailed down a pattern of social network inheritance and its implications for social structure, rank, and survival.
A creative rendition of SARS-CoV-2 virus particles, not to scale. As of mid-July, the virus has sickened more than 186 million people worldwide and more than 4 million people have died from it, according to the World Health Organization. Globally, more than 3.3 billion vaccine doses have been administered. (Homepage image: NIAID)
The long view on COVID-19 vaccine safety and efficacy
Penn researchers weigh in on the regulatory and scientific efforts to track COVID-19 vaccines.
