Life Lines by Dr. Dolittle

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Tag Archive for ‘American Physiological Society’

Nitrites and noses

If you have ever had a fish tank, you may be familiar with monitoring ammonia levels in the water. Ammonia levels can rise due to overcrowding, overfeeding, as well as fish waste. Nitrite levels in the water also require monitoring as nitrite can bind to hemoglobin, which prevents oxygen from binding. In effect, by preventing oxygen from binding, the fish can succumb to hypoxia. Hannah Hughes, a graduate student working […]

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More than milk

Prolactin is an important pituitary hormone in mammals that works with oxytocin to provide milk for offspring. It also plays a role in promoting bonding between new mothers and their offspring. But did you know that non-mammalian vertebrates have prolactin too? Considering non-mammalian organisms do not have mammary glands, it must serve a different purpose in these animals.   As it turns out, prolactin is very important in the ability […]

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Geriatric bees

Jacob Pithan, a graduate student in the laboratory of Dr. Kendra Greenlee (North Dakota State University), presented their research examining how aging affects exercise performance as well as oxidative health at last month’s Experimental Biology conference in Philadelphia. The oxidative stress theory of aging postulates that aging results from an overproduction of free radicals along with a decrease in antioxidants that can scavenge them. The problem with free radicals is […]

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Grappling with gravidity

In humans, pregnancy can be an uncomfortable time as the growing fetus makes it more difficult to breathe. It can also become more difficult for the expectant mother to get around. It may be surprising to find out that grasshoppers may develop similar issues when they are ‘expecting’. In fact, a gravid grasshopper can carry an egg mass that makes up as much as 40% of their weight! Could you […]

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EB 2022: Seals, seals, and more seals

Several posters at EB 2022 in Philadelphia this month were focused on understanding the remarkable physiology of diving seals. Although we may think of the image below when we picture seals, they really are quite the athletes in water. Kaitlin Allen (a graduate student working in the laboratory of Dr. José Pablo Vázquez-Medina at the University of California Berkeley) presented her research on Northern elephant seals and how these animals […]

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EB 2022: Modeling human diseases and healthy aging

I sat through a very interesting session at this year’s Experimental Biology conference called, “The Power of Comparative Models for Accelerating Translational Healthspan Research: Underutilized Lab Animals, Companion Pets, Old World Monkeys, and Pumas.” While the title seems to capture the general idea of the symposium, I thought I would share a bit more information about the presenters and their exciting research. Dr. Karyn Hamilton from Colorado State University presented […]

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Stranger than science fiction: treefrogs that freeze and live to tell the story

Today we have a guest blog written by Elizabeth Evans (pictured above), a graduate student at the University of Dayton working in the laboratory of Dr. Carissa Krane. She presented her research on freeze tolerance today at the 2022 Experimental Biology conference in Philadelphia. She wrote the award-winning blog entry below which earned the 2022 Dr. Dolittle Travel Award to attend the conference. Congratulations Elizabeth!! Stranger than science fiction: treefrogs […]

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2022 August Krogh Distinguished Lecturer, Dr. Patricia Schulte

Each year, the Comparative and Evolutionary Physiology section of the American Physiological Society presents their highest award, the August Krogh Distinguished Lecture, to a comparative physiologist who “has made major and meritorious contributions” to the field. Dr. August Krogh (1874-1949) was a physiologist who won the Nobel Prize in Physiology or Medicine in 1920. He was very interested in zoology and joined the University of Copenhagen as an Associate Professor […]

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Understanding genetic factors contributing to COPD

According to a study published in the American Journal of Physiology – Regulatory, Integrative and Comparative Physiology, we have a lot in common with fruit flies when it comes to the layer of cells that line our airways. So much so, that researchers claim Drosophila melanogaster are important models for lung diseases such as chronic obstructive pulmonary disease (COPD). COPD is a debilitating disease that claimed the lives of over […]

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Surviving environmental challenges

Red tides happen when dinoflagellate algae populations increase and turn the water a shade of red due their red pigments. These algae consume oxygen in the water and release carbon dioxide and other acidic products that make the surrounding water acidic and hypoxic. These events are becoming more common with climate change. In fact, the most recent event off the coast of Sothern California occurred in 2020 and resulted in […]

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