Journal ArticleDOI
Scrotal insulation and its relationship to abnormal morphology, chromatin protamination and nuclear shape of spermatozoa in Holstein-Friesian and Belgian Blue bulls.
Mohammad Bozlur Rahman,Mohammad Bozlur Rahman,Leen Vandaele,Tom Rijsselaere,Dominiek Maes,Maarten Hoogewijs,A. Frijters,Jakomien Noordman,Ana Granados,Eric Dernelle,Mohammed Shamsuddin,John J. Parrish,Ann Van Soom +12 more
TLDR
Sperm cells at the spermiogenic and meiotic stages of development are more susceptible to heat stress, together with subtle changes in sperm head shape, which can be detected by FHA but not by conventional semen analysis.About:
This article is published in Theriogenology.The article was published on 2011-10-15. It has received 93 citations till now. The article focuses on the topics: Sperm & Semen analysis.read more
Citations
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Journal ArticleDOI
Nuclear morphologies: their diversity and functional relevance.
TL;DR: Some of the nuclear morphologies beyond the spherical and ovoid are described, showing that regulation of gene expression can be influenced by nuclear morphology, and that cells can drastically remodel their chromatin during differentiation.
Journal ArticleDOI
Sperm Protamine-Status Correlates to the Fertility of Breeding Bulls
Sule Dogan,Peter Vargovic,Rodrigo Alves de Oliveira,Lauren E. Belser,Abdullah Kaya,Arlindo A. Moura,Peter Sutovsky,John J. Parrish,Einko Topper,Erdogan Memili +9 more
TL;DR: It was shown that inadequate amount and localization of PRM1 were associated with defects in sperm chromatin structure, coinciding with reduced fertility in bulls, which is highly significant because it reveals molecular and morphological phenotypes of mammalian spermatozoa that influence fertility.
Journal ArticleDOI
Heat stress responses in spermatozoa: Mechanisms and consequences for cattle fertility
Mohammad Bozlur Rahman,Mohammad Bozlur Rahman,Karl Schellander,Núria Llamas Luceño,Ann Van Soom +4 more
TL;DR: This review will focus on the mechanisms of heat stress-induced sperm defects and provide more detailed insights into sperm-borne epigenetic regulations.
Journal ArticleDOI
Evaluation of Lasting Effects of Heat Stress on Sperm Profile and Oxidative Status of Ram Semen and Epididymal Sperm
Thais Rose dos Santos Hamilton,Camilla Mota Mendes,Letícia Signori de Castro,Patrícia Monken de Assis,Adriano Felipe Perez Siqueira,Juliana de Carvalho Delgado,Marcelo Demarchi Goissis,Teresa Muiño-Blanco,José A Cebrián-Pérez,Marcilio Nichi,José Antonio Visintin,Mayra Elena Ortiz D'Ávila Assumpção +11 more
TL;DR: Testicular heat stress induced oxidative stress that led to rescuable alterations after one spermatic cycle in ejaculated sperm and also after 30 days in epididymal sperm is evaluated.
Journal ArticleDOI
Influence of bull age, ejaculate number, and season of collection on semen production and sperm motility parameters in Holstein Friesian bulls in a commercial artificial insemination centre.
TL;DR: Second ejaculates can be collected, particularly from bulls aged less than 1 yr, without a significant decrease in post-thaw sperm motility, thus may be a useful strategy to increase semen availability from young genomically selected AI bulls in high demand.
References
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Journal ArticleDOI
Relative Impact of Oxidative Stress on the Functional Competence and Genomic Integrity of Human Spermatozoa
TL;DR: Human spermatozoa exposed to increasing levels of oxidative stress achieved through the stimulation of endogenous oxidant generation with NADPH or direct exposure to hydrogen peroxide exhibited significantly elevated levels of DNA damage and yet continued to express an enhanced capacity for sperm-oocyte fusion.
Book
Abnormal Morphology of Bovine Spermatozoa
Albert D. Barth,R. J. Oko +1 more
TL;DR: The main findings are that normal Bovine Spermatogenesis and Sperm Maturation and normal Sperm Cell Abnormalities, and Mechanisms of Development of Sperm Tail Defects and Evaluation of the Spermiogram.
Journal ArticleDOI
Effects of heat stress on mammalian reproduction.
TL;DR: Genetic adaptation to heat stress is possible both with respect to regulation of body temperature and cellular resistance to elevated temperature.
Journal ArticleDOI
Haploinsufficiency of protamine-1 or -2 causes infertility in mice.
Chunghee Cho,William D. Willis,Eugenia H. Goulding,Haesook Jung-Ha,Young-Chul Choi,Norman B. Hecht,Edward M. Eddy +6 more
TL;DR: It is found that a decrease in the amount of either protamine disrupts nuclear formation, processing of protamine-2 and normal sperm function, and that haploinsufficiency caused by a mutation in one allele of Prm1 or Prm2 prevents genetic transmission of both mutant and wild-type alleles.
Journal ArticleDOI
The Parkes Lecture. Heat and the testis
TL;DR: The evidence for the lower temperature of the testes of many mammals is summarized, and the reasons suggested for the descent of thetestes into a scrotum are discussed.
Related Papers (5)
The sequential appearance of sperm abnormalities after scrotal insulation or dexamethasone treatment in bulls.
Albert D. Barth,P A Bowman +1 more