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:6/9/2016)... ISTANBUL , June 9, 2016  Perkotek an innovation leader in attendance control ... to seamlessly log work hours, for employers to make sure the right employees are ... Logo - http://photos.prnewswire.com/prnh/20160609/377486LOGO ... ... ...
(Date:6/2/2016)... 2016 The Department of Transport Management ... 44 million US Dollar project, for the , ... Personalization, Enrolment, and IT Infrastructure , to ... and implementation of Identity Management Solutions. Numerous renowned international vendors ... Decatur was selected for the most compliant and ...
(Date:5/24/2016)... 2016 Ampronix facilitates superior patient care by providing unparalleled technology to leaders ... is the latest premium product recently added to the range of products distributed by ... ... ... LCD Medical Display- Ampronix News ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... June 23, 2016 ... 2016;12(1):22-8 http://doi.org/10.17925/OHR.2016.12.01.22 Published recently ... peer-reviewed journal from touchONCOLOGY, Andrew D Zelenetz ... of cancer care is placing an increasing burden ... expensive biologic therapies. With the patents on many ...
(Date:6/23/2016)... ... June 23, 2016 , ... ... line of intelligent tools designed, tuned and optimized exclusively for Okuma CNC machining ... Chicago. The result of a collaboration among several companies with expertise in toolholding, ...
(Date:6/22/2016)... DUBLIN , June 22, 2016 Research ... and Global Markets" report to their offering. ... $39.4 billion in 2014 from $29.3 billion in 2013. The market ... (CAGR) of 13.8% from 2015 to 2020, increasing from $50.6 billion ... and projected product forecasts during the forecast period (2015 to 2020) ...
(Date:6/22/2016)... SAN DIEGO , June 22, 2016   ... the first pluripotent stem cell-derived islet replacement therapy for ... two presentations at ISSCR 2016 Annual Meeting.  ISSCR 2016, ... 22nd to 25th at Moscone West in San Francisco.  ... Details of the presentations are as follows:Event: , Focus ...
Breaking Biology Technology:
Cached News: