Guest guest Posted March 2, 2007 Report Share Posted March 2, 2007 Professor presents 'Aging, Brain Inflammation and Behavior' Kristi Kawanna Rodney presented a seminar " Aging Brain Inflammation and Behavior " on Feb. 2. Hosting the seminar was the department of biological sciences and Phi Sigma. came to ISU from the University of Illinois, where he is an integrative immunology and behavior professor. has also authored over 78 publications. " It is interesting to think about the interaction between the immune system and the brain. Ten years ago people may not have even thought there was such an interaction, but today that is not the case. Remember that the brain does not have a way to detect infection pathogens, but when we are sick we change our behavior, motivating us to act differently than when we are well. I call this the sickness behavior syndrome, " said. After a brief introduction of his study, began to explain the basis of his research. " You begin with an infectious pathogen. A macrophage encounters the infection and produces inflammatory cytokines in the brain. These cytokines cause behavior response, " said. Behavior responses include food intake, spatial working memory deficits, slow wave sleep, lethargy, cognitive and motor deficits, depression, decreased social behavior and anorexia. then discussed the importance of Lipopolysaccharide and sickness behavior. Part of the research has done to understand this concept, has been performed on older rats. A rat injected with increased LPS showed a difference in behavior than a rat that wasn't affected by the LPS. explained the brain forms a representation of the peripheral innate immune system response. The representation is at the origin of sickness behavior and is cytokine based. " It's important to keep in mind that sickness behavior is normally adaptive and fully reversible. s Canguilhem once said 'To be healthy is to be able to be ill and recover from it.' Sickness behavior is a normal part of life, " said. also discussed the fact that ongoing brain pathology " primes " microglia (primary stimulus) and that peripheral infection further activates microglia (secondary stimulus). This information is used in studying diseases such as Multiple Sclerosis and Alzheimer's disease. Also discussed at the seminar were the effects LPS and cytokines have on the elderly. " We need to understand what makes some individuals not recover completely when they get well. This is especially true of the elderly. An infection in an elderly person can lead to cognitive impairment. This then leads to diminished self care such as weight loss, anorexia and the fact that they will be less likely to visit an out-patient clinic. Once self-care begins to diminish, more hospitalization is needed and the mortality rate goes up, " said. At the end of the seminar, guests were encouraged to ask questions. The topics of inflammatory drugs in relation to fevers and whether or not inflammation and depression are related were discussed. " In regards to whether or not inflammatory drugs should be taken to reduce fever is a topic that is being looked at carefully in the medical world. I was surprised last year when I came across an article by the American Nurses Association that discussed the benefits of fever. As long as a fever isn't too high, inflammatory drugs aren't always needed as long as the fever is monitored, " said. " There is a strong link between inflammation of the brain and depression. Anytime there is an increase in inflammation, there can be a disruption in serotonin, which can lead to higher levels of depression, " said. also said anytime there is tissue trauma, inflammation is the response, which can lead to post surgical cognitive disorder. " I thought the seminar was very interesting. Everything was new information to me, but it made sense. was a good speaker who kept the information entertaining. He also brought the information down to a basic level so it was easier to understand, " Slattery, biology graduate student, said. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You are posting as a guest. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.