Navigation Links
Researchers discover that growing up too fast may mean dying young in honey bees
Date:9/24/2008

Hilton Head, SCReactive oxygen species (ROS) occur as a by-product of aerobic metabolism and impair cellular function by damaging proteins, nucleotides and lipids. Organisms possess a variety of anti-oxidant mechanisms to mitigate the effects of ROS, and the oxidative stress model of aging and senescence suggests that physiological performance declines with age due to lifetime accrual of ROS-induced damage and progressively limited anti-oxidant capacity. Hence, the onset, pace and duration of energetically-intense behaviors should affect lifetime kinetics of ROS-induced damage, anti-oxidant responses, physiological capacity and longevity. A new study examines how these traits in honey bees are affected by age and behavioral intensity (factors which can be experimentally decoupled via manipulation of colony demographics), and is the first to use such an approach to test the oxidative stress model of aging in a free-living organism.

Background

Behavioral development in adult honeybees involves a stereotypical transition from energetically-inexpensive hive work to energetically-expensive foraging behavior at approximately 3 weeks of age. Each day after this transition, a foraging bee (which weighs only 80 mg, or roughly equivalent to a breath mint) will on average fly 8 km (5 miles), contract their wing muscles approximately 4,000,000 times, and reduce approximately 60 ml of pure oxygen in its thorax (the body segment housing the flight muscles). Age and foraging behavior should have strong affects on cellular oxidative stress and antioxidant mechanisms, especially in flight muscle, as well as functional senescence. In this study the researchers used single-cohort colonies to experimentally manipulate the onset of foraging and compare markers of oxidative damage and antioxidant mechanisms among different tissues (head vs. thorax), age-matched behavioral groups (hive bees vs. foragers) and periods of the day (morning vs. afternoon), with the prediction that such markers are prevalent in high-intensity tissues, behaviors and day-time periods.

The study was conducted by Stephen P. Roberts, Michelle M. Elekonich and Jason B. Williams, all of the School of Life Sciences, University of Nevada Las Vegas. Their study was funded in part by the National Science Foundation (NSF) and the National Institutes of Health (NIH) and is entitled Oxidative stress and antioxidant mechanisms at the transition to an aerobically intensive lifestyle in honey bees. Dr. Roberts is presenting the team's preliminary findings at the 2008 American Physiological Society Intersociety Meeting The Integrative Biology of Exercise V (APS; www.the-APS.org/press).

Study Summary

oney bees were reared in single-cohort colonies to enable sampling and comparisons of (a) same-aged bees performing different behaviors and (b) different-aged bees performing the same behaviors. Comparison groups were 8-10 day-old (precocious) foragers, 8-10 day-old (typical) hive bees, 30-32 day-old (typical) foragers and 30-32 day-old (over-aged) hive bees. Antioxidant proteins Hsp70 and catalase were measured in head and thorax tissues using western blot. Total antioxidant capacity of the tissues was measured as the ability of homogenate to inhibit the oxidation of ABTS (2,20-azino-di-[3-ethylbenzthiazolinesulphonate]) to ABTS+ relative to trolox standards. Protein carbonylation, aconitase Vmax inhibition and mitochondrial H2O2 production were measured as markers of oxidative damage.

The Preliminary Study Results

The research team found that:

  • Foragers upregulate Hsp70, catalase and total antioxidant capacity in their flight muscles over the course of a day. However, these changes did not occur or were muted in forager head tissues and hive bee flight muscles and head tissues.

  • The diurnal upregulation of antioxidants and antioxidation capacity in flight muscle disappeared with age, which may explain the impairment of flight muscle mitochondrial function (elevated H2O2 production and reduced aconitase Vmax) and flight capacity observed in foragers.

Conclusions

According to Dr. Roberts, the study's first author, "These data show that transitions to aerobically-expensive behaviors in organisms living free in nature can have important consequences affecting the pace of aging and senescence. The results support a live-fast-and-die-young view of aging, but so many questions remain about how this aging model works in natural populations, especially for species like honey bees whose social complexity rivals our own."


'/>"/>

Contact: Donna Krupa
DKrupa@the-aps.org
703-967-2751
American Physiological Society
Source:Eurekalert

Related biology news :

1. Researchers identify proteins involved in new neurodegenerative syndrome
2. Texas researchers and educators head for Antarctica
3. MGH researchers describe new way to identify, evolve novel enzymes
4. University of Pennsylvania researchers develop formula to gauge risk of disease clusters
5. U of MN researchers discover noninvasive diagnostic tool for brain diseases
6. U of Minnesota researchers discover noninvasive diagnostic tool for brain diseases
7. Researchers discover new strategies for antibiotic resistance
8. Researchers find new taste in fruit flies: carbonated water
9. Binghamton University researchers investigate evolving malaria resistance
10. UIC researchers find promising new targets for antibiotics
11. Researchers develop simple method to create natural drug products
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/11/2017)... 11, 2017 Crossmatch®, a globally-recognized leader ... today announced that it has been awarded a ... Activity (IARPA) to develop next-generation Presentation Attack Detection ... "Innovation has been a driving force within Crossmatch ... allow us to innovate and develop new technologies ...
(Date:4/5/2017)... , April 5, 2017  The Allen Institute for ... Cell Explorer: a one-of-a-kind portal and dynamic digital window ... imaging data, the first application of deep learning to ... stem cell lines and a growing suite of powerful ... for these and future publicly available resources created and ...
(Date:3/30/2017)... , March 30, 2017  On April 6-7, 2017, ... the Genome hackathon at Microsoft,s headquarters in ... competition will focus on developing health and wellness apps ... Hack the Genome is the first hackathon ... The world,s largest companies in the genomics, tech and ...
Breaking Biology News(10 mins):
(Date:10/11/2017)... ... October 11, 2017 , ... ... granted orphan drug designation to SBT-100, its novel anti-STAT3 (Signal Transducer and Activator ... osteosarcoma. SBT-100 is able to cross the cell membrane and bind intracellular STAT3 ...
(Date:10/10/2017)... ... October 10, 2017 , ... ... (ADC) therapeutics, today confirmed licensing rights that give it exclusive global access ... developed in collaboration with Children’s Hospital Los Angeles (CHLA). Additionally, an ...
(Date:10/10/2017)... ... , ... Dr. Bob Harman, founder and CEO of VetStem Biopharma, Inc. ... The event entitled “Stem Cells and Their Regenerative Powers,” was held on August ... MPVM was joined by two human doctors: Peter B. Hanson, M.D., Chief of Orthopedic ...
(Date:10/10/2017)... Calif. , Oct. 10, 2017 SomaGenics ... from the NIH to develop RealSeq®-SC (Single Cell), expected ... for profiling small RNAs (including microRNAs) from single cells ... Program highlights the need to accelerate development of approaches ... "New techniques for measuring levels ...
Breaking Biology Technology: