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:7/20/2017)... DAL ) customers now can use fingerprints instead of their boarding ... ... biometrics to board aircraft at Reagan Washington National Airport ... Delta,s biometric boarding pass experience that launched in May at the ... to allow eligible Delta SkyMiles Members who are enrolled in CLEAR to ...
(Date:5/16/2017)... TEANECK, N.J. , May 16, 2017  Veratad ... leading provider of online age and identity verification solutions, ... the K(NO)W Identity Conference 2017, May 15 thru May ... Ronald Regan Building and International Trade Center. ... across the globe and in today,s quickly evolving digital ...
(Date:4/18/2017)... 18, 2017  Socionext Inc., a global expert in SoC-based imaging ... server, the M820, which features the company,s hybrid codec technology. A ... Tera Probe, Inc., will be showcased during the upcoming Medtec Japan ... at the Las Vegas Convention Center April ... Click here for ...
Breaking Biology News(10 mins):
(Date:10/10/2017)... ... October 10, 2017 , ... ... pharmaceutical company advancing targeted antibody-drug conjugate (ADC) therapeutics, today confirmed licensing rights ... (Hybrid Polymerized Liposomal Nanoparticle), a technology developed in collaboration with Children’s Hospital ...
(Date:10/10/2017)... ... October 10, 2017 , ... Dr. Bob Harman, founder ... local San Diego Rotary Club. The event entitled “Stem Cells and ... had 300+ attendees. Dr. Harman, DVM, MPVM was joined by two human doctors: ...
(Date:10/10/2017)... 10, 2017 SomaGenics announced the receipt of ... develop RealSeq®-SC (Single Cell), expected to be the first ... (including microRNAs) from single cells using NGS methods. The ... to accelerate development of approaches to analyze the heterogeneity ... "New techniques for measuring levels of mRNAs in individual ...
(Date:10/10/2017)... ... October 10, 2017 , ... The Pittcon Program Committee is ... honoring scientists who have made outstanding contributions to analytical chemistry and applied spectroscopy. ... world’s leading conference and exposition for laboratory science, which will be held February ...
Breaking Biology Technology:
Cached News: