Improvement of sperm morphology after surgical varicocele repair

One of the unifying traits of life on this planet is reproduction, or life's ability to make copies of itself. The mode of reproduction has evolved over time, having almost certainly begun with simple asexual reproduction when the ancestral single celled organism divided into two. Since these beginnings' life has tried out numerous strategies, and perhaps one of the most important and successful has been sexual reproduction. This form of reproduction relies on the union of gametes, otherwise known as sperm and egg. Evolutionarily, sexual reproduction allows for greater adaptive potential because the genes of two unique individuals have a chance to recombine and mix in order to produce a new individual. Unlike asexual reproduction which produces genetically-identical clones of the parent individual, sex produces offspring with novel genes and combinations of genes. Therefore, in the face of new selective pressures there is a higher chance that one of these novel genetic profiles will produce an adaptation that is advantageous in the new circumstances. Dr Akihiko Watanabe is a reproductive biologist based in the Department of Biology, Faculty of Science Yamagata University in Japan, he is currently working on three research projects; a comparative study on the signalling pathways for inducing sperm motility and acrosome reaction in amphibians, the mechanism behind the adaptive modification of sperm morphology and motility, and the origin of sperm motility initiating substance (SMIS).

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Sperm Morphology: Does It Have Predictive Value for In Vitro Fertilization?

Seminars in Reproductive Medicine ◽

10.1055/s-2007-1018813 ◽

1993 ◽

Vol 11 (01) ◽

pp. 17-26

Author(s):

Lynn Fraser ◽

Shaona DasGupta

Keyword(s):

In Vitro Fertilization ◽

Predictive Value ◽

Sperm Morphology ◽

Vitro Fertilization

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The Analysis of Mobile Platform based CNN Networks in the Classification of Sperm Morphology

2020 Medical Technologies Congress (TIPTEKNO) ◽

10.1109/tiptekno50054.2020.9299281 ◽

2020 ◽

Author(s):

Omer Lutfu Tortumlu ◽

Hamza Osman Ilhan

Keyword(s):

Sperm Morphology ◽

Mobile Platform

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Expression of Apoptosis-Related Genes in Cat Testicular Tissue in Relation to Sperm Morphology and Seasonality—A Preliminary Study

Animals ◽

10.3390/ani11020489 ◽

2021 ◽

Vol 11 (2) ◽

pp. 489

Author(s):

Sylwia Prochowska ◽

Agnieszka Partyka ◽

Wojciech Niżański

Keyword(s):

Sperm Morphology ◽

Semen Quality ◽

Testicular Tissue ◽

Reproductive Season ◽

Tissue Samples ◽

Protein Levels ◽

Expression Of Genes ◽

Testicular Regression ◽

Preliminary Study ◽

Apoptotic Genes

Apoptosis is a crucial process in spermatogenesis, responsible for the elimination of abnormal sperm cells and testicular regression out of breeding season. The aim of this study was to assess if the expression of apoptosis-related genes in testicular tissue of domestic cats differed: (1) between normozoospermic and teratozoospermic donors, and (2) between reproductive and non-reproductive season. The expression of genes: BCL2L1, BCL2, BAX, BAD, FAS, FASLG, and caspases (CASP3, CASP8, CASP9, and CASP10) was analyzed by qRT-PCR in testicular tissue samples. During non-reproductive season significantly higher expression of two anti-apoptotic genes (BCL2L1 and BCL2) was observed. Additionally, there was a significant higher expression of CASP10 in teratozoospermic cats during non-reproductive than during reproductive season. No differences were noted between normozoospermic and teratozoospermic groups. Upregulation of some genes during the non-reproductive season indicates engagement of apoptotic mechanisms in the seasonal changes of semen quality in cats, however further studies on protein levels and analysis of changes on distinct testicular germinal layers are required. At the same time, teratozoospermia in the general population of cats seems to be not connected with dysregulation of apoptosis in the testes.

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