What question did this study set out to answer?

To develop a flow cytometric method for quantifying intracellular reactive oxygen species (ROS) and mitochondrial transmembrane potential in viable boar sperm to understand cryopreservation-associated damage.

August 1, 2006Journal of Animal Science

Determination of intracellular reactive oxygen species and high mitochondrial membrane potential in Percoll-treated viable boar sperm using fluorescence-activated flow cytometry1

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Authors

HGH. D. GuthrieAgricultural Research Service GWG. Rickey WelchAgricultural Research Service

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Implication

Experimental study demonstrates that oxidative stress impairs mitochondrial potential and motility in boar sperm, indicating hydrogen peroxide as a key mediator of functional loss.

Key Points

To develop a flow cytometric method for quantifying intracellular reactive oxygen species (ROS) and mitochondrial transmembrane potential in viable boar sperm to understand cryopreservation-associated damage.
Separated viable fresh and frozen-thawed boar spermatozoa using Percoll gradients and impermeable DNA exclusion dyes.
Quantified intracellular ROS with hydroethidine and 2', 7'-dichlorodihydrofluorescein diacetate, and assessed mitochondrial potential using JC-1 via flow cytometry.
Treated sperm with ROS generators (xanthine/xanthine oxidase, menadione) and scavengers (catalase, superoxide dismutase) to evaluate motility and mitochondrial integrity.
Basal ROS formation was below 4% and did not differ between viable fresh and frozen-thawed sperm (P = 0.26), with both displaying similar susceptibility to xanthine/xanthine oxidase induction (94.4% vs 87.9%, P = 0.20).
Menadione exposure significantly increased ROS formation (P < 0.05), decreased JC-1 aggregate fluorescence (P < 0.05), and reduced motion variables by 25% to 60% (P < 0.05).
Catalase attenuated ROS-mediated motility inhibition while superoxide dismutase did not, identifying hydrogen peroxide as the primary intracellular mediator of functional suppression.

Cite This Study

Guthrie et al. (2006) studied this question.

synapsesocial.com/papers/6aa3cf03240321efda555731 https://doi.org/10.2527/jas.2005-766

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Implication

Experimental study demonstrates that oxidative stress impairs mitochondrial potential and motility in boar sperm, indicating hydrogen peroxide as a key mediator of functional loss.

Determination of intracellular reactive oxygen species and high mitochondrial membrane potential in Percoll-treated viable boar sperm using fluorescence-activated flow cytometry1

Discussion

Member takes

Implication

Key Points

Cite This Study

Determination of intracellular reactive oxygen species and high mitochondrial membrane potential in Percoll-treated viable boar sperm using fluorescence-activated flow cytometry1

Discussion

Member takes

Implication

Key Points

Cite This Study

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