Boosting immunity in cattle may mean more productivity
Could immunometabolism and its impact on cattle health be the key to efficiency?
August 22, 2019
Soure: Certified Angus Beef
A Kansas State University researcher’s work may change the way we think about cattle management. The research may bring a bigger spotlight on the need to boost immune response to create more efficiency and perhaps better profits.
“The body makes a lot of adaptations to make sure the immune system has what it needs to combat infection,” according to Barry Bradford, an animal scientist at Kansas State University. The same systems collaborate with metabolism for growth, development and health throughout life – from fetus to feedyard or pasture.
The cost of disease, he said, includes increased metabolic activity, reduced nutrient availability, altered priorities for nutrient utilization, increased turnover rates in the immune system, damage to tissue and a “genetic loss” to offspring. Logic says easing the impact of stress helps more cattle realize their genetic potential for premium carcass merit, too.
Bradford is working with cattle to study immunometabolism. It’s a 16-letter term for immune cells that share nutrients with the major organs. That interaction of cells competing, sharing and utilizing nutrients is especially key in times of illness, he said.
Bradford presented his work at the American Society of Animal Scientists in July.
The research
Bradford’s research focus is the inflammatory response during times of stress and that impact on liver health. “To combat potential invading organisms quickly, the immune system uses cells like macrophages,” he said. “These are the cells looking for any signs of bacteria.”
Unlike many immune cells, macrophages live in tissues – not swimming around the bloodstream – and they are present all the time, monitoring for abnormalities.
“What we are learning now is they’re not just looking for signs of bacteria or infection, but they’re also playing really important roles in regulating how the tissue works day to day,” Bradford said. “Turning on a breakdown of body fat when the animal doesn’t have enough energy is actually influenced by these immune cells.”
Traditionally only thought to play a role in infectious scenarios, Bradford said, “The interactions between normal organ function and the immune system are becoming much tighter than we used to think.”
Immune challenges
Research animals faced with an immune challenge have a dramatic change in nutrient availability in the bloodstream. That affects the building blocks of protein synthesis available for normal growth and development.