Archives for September, 2017

A new study conducted by Drs. Sara Letzner and Onur Gunturkun (Ruhr-Universitat at Bochum) as well as Dr. Christian Beste (Technische Univeritat at Dresden) shows that pigeons are better than humans when it comes to multitasking. Their findings were published inĀ Current Biology. The findings from the study show that the mammalian cerebral cortex, with all…

I just read an interesting paper published in Physiology. Animals periodically undergo periods of food deprivation such as during hibernation, mating, molting and migration. During these period of fasting, they become insulin resistant which helps to preserve glucose stores in the body. In this review, the authors explore the role of the thyroid in regulating…

People with diabetes have less sRAGE

  When blood sugar concentrations are elevated, humans run the risk of glucose binding to proteins in the blood and causing the irreversible formation of advanced glycation end products (AGE). Once formed, AGEs can bind to their receptor (RAGE) and stimulate inflammation and oxidative stress. This pathological signaling can be stopped by pieces of the…

Mexican tetra (Astyanax mexicanus) are a fascinating example of divergent evolution. Over time, some of these freshwater river fish washed into caves where they continue to live. With perpetual darkness, these cavefish have lost their ability to see along with their skin pigmentation. Oxygen and food are also hard to come by in the caves.…

Through the course of evolution vertebrates have apparently lost their gene-encoded viral defense mechanisms. These ancient defenses allow plants and insects to silence the expression of certain genes by using what is known as RNA interference. This natural defense system can be manipulated to create genetically modified crops that resist certain infections. However, a new…

The marsupial placenta

Image of a tammar wallaby and her joey By Mathae – Own work via Wikimedia Commons   When I think of marsupials, what comes to mind is an image of a mother carrying her young (joey) in a pouch. Contrary to popular belief, however, mother tammar wallabies (Macropus eugenii) have an internal functioning placenta. Albeit,…