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:


(Date:6/3/2016)... June 3, 2016 ... Nepal hat ein ... hochsicherer geprägter Kennzeichen, einschließlich Personalisierung, Registrierung und ... der Produktion und Implementierung von Identitätsmanagementlösungen. Zahlreiche ... im Januar teilgenommen, aber Decatur wurde als ...
(Date:6/2/2016)... 2016 Perimeter Surveillance & Detection ... Physical Infrastructure, Support & Other Service  The ... offers comprehensive analysis of the global Border Security ... revenues of $17.98 billion in 2016. Now: ... leader in software and hardware technologies for advanced video ...
(Date:5/20/2016)...  VoiceIt is excited to announce its new ... By working together, VoiceIt and VoicePass will offer ... take slightly different approaches to voice biometrics, collaboration ... usability. Both ... "This marketing and technology partnership allows ...
Breaking Biology News(10 mins):
(Date:6/27/2016)... , June 27, 2016 /PRNewswire/ - BIOREM Inc. (TSX-V: ... been advised by its major shareholders, Clean Technology Fund ... United States based venture capital funds ... of Biorem (on a fully diluted, as converted basis), ... disposition of their entire equity holdings in Biorem to ...
(Date:6/27/2016)... NC (PRWEB) , ... June 27, 2016 , ... ... just published their findings on what they believe could be a new and ... of the new research. Click here to read it now. , ...
(Date:6/27/2016)... ... June 27, 2016 , ... Newly created ... and solutions to the healthcare market. The company's primary focus is on new ... and marketing strategies that are necessary to help companies efficiently bring their products ...
(Date:6/27/2016)... , June 27, 2016  Liquid Biotech ... the funding of a Sponsored Research Agreement with ... tumor cells (CTCs) from cancer patients.  The funding ... CTC levels correlate with clinical outcomes in cancer ... data will then be employed to support the ...
Breaking Biology Technology:
Cached News: