Navigation Links
Individuals vary their immune response according to age, sex and the costs
Date:9/10/2008

Is it always good to respond maximally when pathogens or disease strike, or should individuals vary their immune response to balance immediate and future costs? This is the question evolutionary physiologists Oliver Love, Katrina Salvante, James Dale, and Tony Williams asked when they examined how a simple immune response varied at different life stages across the life-span of individual zebra finches (Taeniopygia guttata), in a study published in the September issue of the American Naturalist.

When transitioning from nest-bound juveniles to adults, female immune responses matured slowly whereas males showed dramatic variation potentially due to the costs of molting into their colorful sexually dimorphic plumage. Adult males showed little variation in immune response despite changes in resource quality. Likewise, when females laid eggs under high-quality resource conditions, immune responses were also consistent with those during non-breeding and similar to male responses. However, when laying on reduced resources females reduced their immune response and their reproductive output consistent with a facultative (resource-driven) effect of reproductive effort on immunity. Moreover, even under high-resource conditions during the chick-rearing stage mothers showed reduced immune responses compared to fathers suggesting a residual energetic cost of egg-laying. Perhaps most importantly, immune responses of juveniles of both sexes did not predict their subsequent adult responses. Immune responses of adult females were only predictable when the quality of the environment remained constant; as soon as conditions deteriorated, individual females required flexibility in both the immune and reproductive systems. However, the degree of flexibility came at a cost as only individuals with high immune responses as non-breeders had the capacity to reduce responses when times became tough. These results underlie the fact that immunity is a highly plastic trait that can be modulated in a sex- and context-dependent manner. Given the need for individual flexibility in the immune system, this suggests that an immune response at one stage may provide limited information about immune response at future stages.


'/>"/>

Contact: Patricia Morse
pmorse@press.uchicago.edu
773-702-0446
University of Chicago Press Journals
Source:Eurekalert  

Related biology news :

1. Caltech neurobiologists discover individuals who hear movement
2. Jingle bells not merry for tone-deaf individuals
3. How plants fine tune their natural chemical defenses
4. Old before their time? Aging in flies under natural vs. laboratory conditions
5. Codeine not safe for all breastfeeding moms and their babies
6. Parents shape whether their children learn to eat fruits and vegetables
7. Guilt on their hands: tiny tags could help to solve and deter gun crime
8. Male fish deceive rivals about their top mate choice
9. Syracuse University scientists discover how some bacteria may steal iron from their human hosts
10. Ultrasonic frogs can tune their ears to different frequencies
11. Pregnant mice block out unwelcome admirers to protect their pups
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Individuals vary their immune response according to age, sex and the costs
(Date:7/20/2017)... -- Delta (NYSE: DAL ) customers now can use fingerprints ... Washington National Airport (DCA). ... Delta launches biometrics to board aircraft at Reagan Washington National ... Delta,s biometric boarding pass experience that launched ... into the boarding process to allow eligible Delta SkyMiles Members who are ...
(Date:6/23/2017)... and ITHACA, N.Y. , June ... Cornell University, a leader in dairy research, today announced ... designed to help reduce the chances that the global ... onset of this dairy project, Cornell University has become ... Sequencing the Food Supply Chain, a food safety initiative ...
(Date:5/23/2017)... 23, 2017  Hunova, the first robotic gym for the rehabilitation and ... launched in Genoa, Italy . The first 30 robots ... the USA . The technology was developed and patented ... the IIT spin-off Movendo Technology thanks to a 10 million euro investment ... please click: ...
Breaking Biology News(10 mins):
(Date:10/11/2017)... ... 11, 2017 , ... A new study published in Fertility ... fresh in vitro fertilization (IVF) transfer cycles. The multi-center matched cohort ... After comparing the results from the fresh and frozen transfer cohorts, the authors ...
(Date:10/10/2017)... ... October 10, 2017 , ... Dr. Bob Harman, founder and CEO ... Diego Rotary Club. The event entitled “Stem Cells and Their Regenerative ... attendees. Dr. Harman, DVM, MPVM was joined by two human doctors: Peter B. ...
(Date:10/9/2017)... , Oct. 9, 2017  BioTech Holdings ... mechanism by which its ProCell stem cell therapy ... limb ischemia.  The Company, demonstrated that treatment with ... of limbs saved as compared to standard bone ... molecule HGF resulted in reduction of therapeutic effect.  ...
(Date:10/7/2017)... Phoenix, Arizona (PRWEB) , ... ... ... than 15 years’ experience providing advanced instruments and applications consulting for microscopy ... the in-house expertise in application consulting, Nanoscience Analytical offers a broad range ...
Breaking Biology Technology: