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A critical enzyme for sperm formation could be a target for treating male infertility
Side-by-side microscopic images of cell spindle during meiosis. Left image shows green with pink in the middle, right shows green with pink spots throughout.

The activity of the Skp1 protein is crucial for sperm formation, Penn Vet scientists found. In a dividing sperm precursor cell, chromosomes (in purple) normally align in the middle, as shown on the left. But in cells lacking Skp1, as shown on the right, chromosomes fail to align and are instead distributed chaotically around the cell. (Image: Courtesy of the Wang laboratory)

A critical enzyme for sperm formation could be a target for treating male infertility

The protein, SKP1, drives a key transition step in male meiosis, the type of cell division process that results in sperm, School of Veterinary Medicine researchers found.

Katherine Unger Baillie

Health equity in a time of global crisis
Burred image of empty chairs in foreground and a crowded medical waiting room in background

Health equity in a time of global crisis

Jennifer Prah Ruger discusses global health equity in a time of global crisis, why it matters for everyone, where U.S. policy is succeeding and failing, and what we need to do going forward.

Kristina Linnea García

Pandemics, quarantines, and history
A watercolor painting depicts a three masted ship anchored near a port with a yellow flag aloft.

A yellow quarantine flag is raised on a ship anchored off a port in this watercolor painting by E. Schwartz.

Pandemics, quarantines, and history

History professor Alex Chase-Levenson explores pandemics and quarantines in his upcoming book, and shares lessons that citizens and politicians can take from the past.

Kristen de Groot

Bacteria form biofilms like settlers form cities
Four panel image shows small blobs progressively growing to larger groupings

Bacteria form biofilms like settlers form cities

New research from the School of Dental Medicine gives a satellite-level view of how biofilms grow and expand on a surface.

Katherine Unger Baillie

Penn is fighting pancreatic cancer
penn medicine doctor looking at sample

Penn is fighting pancreatic cancer

Researchers within the Penn Pancreatic Research Center and beyond continue to seek innovative ways to treat and detect this deadly disease—and are making promising progress.
The facts on coronavirus testing
Abstract vector coronavirus illustration

The facts on coronavirus testing

FactCheck.org explains how testing works, what happened with the CDC’s coronavirus test and what’s known about how many tests are available in the U.S.

Penn Today Staff

The politics of health inequality
A person in a black dress and glasses stands against a wooden wall with arms crossed, looking at the camera, in the background is a huge window and people in chairs in front of the window.

Julia Lynch, associate professor of political science. Her new book "Regimes of Inequality: The Political Economy of Health and Wealth" looks at why health inequality as framed by politicians is impossible to tackle.

The politics of health inequality

The eight major Democratic candidates for president agree that Americans need expanded and more affordable health care. According to Julia Lynch, none of their proposed plans will solve the problem of heath inequality in the U.S.

Kristen de Groot