C
Carl Lessard
Researcher at Laval University
Publications - 7
Citations - 421
Carl Lessard is an academic researcher from Laval University. The author has contributed to research in topics: Sperm & Epididymis. The author has an hindex of 5, co-authored 6 publications receiving 383 citations.
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Journal ArticleDOI
Cryopreservation alters the levels of the bull sperm surface protein P25b.
TL;DR: The loss of P25b may be responsible, at least in part, for the decrease in fertility following the freezing-thawing procedure of bull semen, and these results may have significant clinical applications in which frozen semen is used.
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Selected Proteins of “Prostasome-Like Particles” from Epididymal Cauda Fluid Are Transferred to Epididymal Caput Spermatozoa in Bull
TL;DR: The effect of divalent cations on PLPCd protein transfer to caput spermatozoa was investigated and Zn2+ had a beneficial effect, discussed with regard to the function ofPLPCd in epididymal sperm maturation.
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Aldose Reductase and Macrophage Migration Inhibitory Factor Are Associated with Epididymosomes and Spermatozoa in the Bovine Epididymis
TL;DR: An aldose reductase known for its 20α-hydroxysteroid dehydrogenase activity and the cytokine (macrophage migration inhibitory factor) have been identified and revealed that these two proteins are characterized by the lack of a signal peptide.
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Polyol pathway along the bovine epididymis.
TL;DR: The present study shows that cytosolic aldose reductase activity was maximal in the proximal and middle segments of the epididymis and decreased in the distal epiddymis, and sorbitol dehydrogenase activity as well as the level of the encoding mRNA showed the same pattern of distribution.
Journal ArticleDOI
Semen characteristics of genetically identical quadruplet bulls.
Carl Lessard,Isabelle Masseau,Jean-François Bilodeau,Tom Kroetsch,Hermenegilde Twagiramungu,Janice L. Bailey,Pierre Leclerc,Robert Sullivan +7 more
TL;DR: Higher instability of cryopreserved spermatozoa from Q(4) and the lower semen production of Q(3), compared to their siblings, indicate that differences in semen characteristics can indeed exist among genetically identical animals produced by blastomere separation.