HOME >> BIOLOGY >> NEWS
Hearts of male and female rainbow trout are different

Ventricle rings were processed, sectioned and stained. Light microscopy was used to capture images of ventricle layers and analyzed for layer cross-sectional areas. Lactate concentration and net lactate release from cardiac tissue was also examined.

Results

The researchers found:

  • ventricle strips from males and females had similar rates of oxygen consumption and lactate release under resting conditions;

  • the inhibition of oxidative metabolism with NaCN lowered cardiac performance dramatically, and elevated resting tension and lactate release in both males and females;

  • under stimulated conditions with DCA vs. controls, female ventricle strips selectively demonstrated better performance and reduced lactate release;

  • force production during reoxygenation -- after a hypoxic insult -- significantly improved in males receiving DCA, but not females;

  • male ventricle tissue had 2.5-fold higher citrate concentrations than females; and;

  • males had a proportionately larger epicardium to endocardium ratio compared with females with similar size hearts.

Summary and Conclusions

This study expands upon previous findings that sex differences in cardiac performance and metabolism exist in fish in general, and have now been found to occur in rainbow trout in particular. Moreover, the differences are only realized during working conditions and involve stimulation or inhibition of the glycolytic pathway and carbohydrate oxidation. Ultimately, sex differences in cardiac energy metabolism and function may help define habitat suitability, swimming capabilities and health status of wild and hatchery-reared rainbow trout, and human heart disease, sex-specific treatment.


'"/>

Contact: Donna Krupa
DKrupa@the-APS.org
301-634-7209
American Physiological Society
30-Apr-2007


Page: 1 2 3

Related biology news :

1. Hearts or tails?
2. Cardio exercise benefits in male vs. female hearts
3. The female advantage in kidney disease does not extend to diabetic women
4. Disabling a sensory organ prompts female mice to act like male mice
5. A sensory organ, not the brain, differentiates male and female behavior in some mammals
6. MGH researchers confirm that bone marrow restores fertility in female mice
7. Male or female factor infertility -- men suffer just the same
8. CU study reveals why starling females cheat
9. Philandering female felines forgo fidelity
10. Update on census of wrlds most endangered cat -- female Amur leopard found dead
11. The sturdier sex? -- Study by Pittsburgh scientists finds female stem cells work better

Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Hearts male and female rainbow trout are different

(Date:7/24/2014)... 24, 2014) Scientists at The New York ... step closer to creating a viable cell replacement ... cells. , For the first time, NYSCF ... from skin samples of patients with primary progressive ... protocol to induce these stem cells into becoming ...
(Date:7/24/2014)... 2014) Scientists at The New York Stem ... closer to creating a viable cell replacement therapy ... , For the first time, NYSCF scientists ... skin samples of patients with primary progressive multiple ... to induce these stem cells into becoming oligodendrocytes, ...
(Date:7/24/2014)... identified two factors that characterize sustainable university and ... highly qualified physics teachers. Specifically, one or more ... education in combination with institutional motivation and commitment ... Technology, Engineering and Math (STEM) teacher shortages are ... the way for institutions seeking to increase the ...
Breaking Biology News(10 mins):NYSCF scientists one step closer to cell therapy for multiple sclerosis patients 2NYSCF scientists 1 step closer to cell therapy for multiple sclerosis patients 2Creating sustainable STEM teacher preparation programs 2
(Date:7/24/2014)... 2014 -- A novel combination of microscopy and data ... Oak Ridge National Laboratory an unprecedented look at the ... and electrochemical properties. , The research team led ... surface of a perovskite manganite, a complex material that ... to understand surface behavior could benefit researchers who are ...
(Date:7/24/2014)... BURLINGAME, Calif. , July 24, 2014  ECC ... Denver, Colorado with University College Hospital ... of a development project to finance, design, construct, and ... Ibadan, Nigeria . Under the first ... and prepare scoping documents and funding applications. UCH Ibadan ...
(Date:7/24/2014)... Professor of Engineering at the University of Delaware, ... problems in energy engineering, environmental sustainability and electronics. ... porous rock with a well-defined, crystalline structure. At ... precisely decided that zeolites can separate molecules with ... angstrom (one-tenth of a nanometer), making them useful ...
(Date:7/24/2014)... 2014 Your cell phone may ... lithium-ion battery storage capacity. , New research indicates ... model created at Lawrence Livermore National Laboratory ... how carbon components will perform as electrodes. , ... urgent need for higher-performance batteries. Several key characteristics ...
Breaking Biology Technology:ORNL study reveals new characteristics of complex oxide surfaces 2ECC Signs a Contract for the Finance, Design, and Construction of a Premier Cancer Institute in Ibadan, Nigeria 2University of Delaware researcher describes new approach for creating organic zeolites 2Getting More Life out of Lithium-ion Batteries 2
Cached News: