scholarly journals Sperm Motility Regulation in Male and Female Bird Genital Tracts

2021 ◽  
Author(s):  
Mei Matsuzaki ◽  
Tomohiro Sasanami
Keyword(s):  
Sperm Motility ◽  
Male And Female ◽  
Female Bird ◽  
Motility Regulation

scholarly journals CRISP2, CATSPER1 and PATE1 Expression in Human Asthenozoospermic Semen

Cells ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 1956
Author(s):  
Francesco Manfrevola ◽  
Bruno Ferraro ◽  
Carolina Sellitto ◽  
Domenico Rocco ◽  
Silvia Fasano ◽  
...  
Keyword(s):  
Sperm Motility ◽  
Molecular Mechanisms ◽  
Gradient Centrifugation ◽  
Circular Rnas ◽  
Amino Acid Supplementation ◽  
Differential Analysis ◽  
Mrna Targets ◽  
Motility Regulation ◽  
Quantitative Changes

The etiology of human asthenozoospermia is multifactorial. The need to unveil molecular mechanisms underlying this state of infertility is, thus, impelling. Circular RNAs (circRNAs) are involved in microRNA (miRNA) inhibition by a sponge activity to protect mRNA targets. All together they form the competitive endogenous RNA network (ceRNET). Recently, we have identified differentially expressed circRNAs (DE-circRNAs) in normozoospermic and asthenozoospermic patients, associated with high-quality (A-spermatozoa) and low-quality (B-spermatozoa) sperm. Here, we carried out a differential analysis of CRISP2, CATSPER1 and PATE1 mRNA expression in good quality (A-spermatozoa) and low quality (B-spermatozoa) sperm fractions collected from both normozoospermic volunteers and asthenozoospermic patients. These sperm fractions are usually separated on the basis of morphology and motility parameters by a density gradient centrifugation. B-spermatozoa showed low levels of mRNAs. Thus, we identified the possible ceRNET responsible for regulating their expression by focusing on circTRIM2, circEPS15 and circRERE. With the idea that motility perturbations could be rooted in quantitative changes of transcripts in sperm, we evaluated circRNA and mRNA modulation in A-spermatozoa and B-spermatozoa after an oral amino acid supplementation known to improve sperm motility. The profiles of CRISP2, CATSPER1 and PATE1 proteins in the same fractions of sperm well matched with the transcript levels. Our data may strengthen the role of circRNAs in asthenozoospermia and shed light on the molecular pathways linked to sperm motility regulation.

Crosstalk between protein kinases A and C regulates sea urchin sperm motility

Zygote ◽  
2021 ◽  
pp. 1-12
Author(s):  
Arlet Loza-Huerta ◽  
Hiram Pacheco-Castillo ◽  
Alberto Darszon ◽  
Carmen Beltrán
Keyword(s):  
Protein Kinase ◽  
Sperm Motility ◽  
Sea Urchin ◽  
Sea Urchins ◽  
Dependent Protein Kinase ◽  
Kinase C ◽  
Competitive Inhibitors ◽  
Motility Regulation ◽  
Dependent Protein ◽  
Sea Urchin Sperm

Summary Fertilization, a crucial event for species preservation, in sea urchins, as in many other organisms, requires sperm motility regulation. In Strongylocentrotus purpuratus sea urchins, speract, a sperm chemoattractant component released to seawater from the outer egg layer, attracts sperm after binding to its receptor in the sperm flagellum. Previous experiments performed in demembranated sperm indicated that motility regulation in these cells involved protein phosphorylation mainly due to the cAMP-dependent protein kinase (PKA). However, little information is known about the involvement of protein kinase C (PKC) in this process. In this work, using intact S. purpuratus sea urchin sperm, we show that: (i) the levels of both phosphorylated PKA (PKA substrates) and PKC (PKC substrates) substrates change between immotile, motile and speract-stimulated sperm, and (ii) the non-competitive PKA (H89) and PKC (chelerythrine) inhibitors diminish the circular velocity of sperm and alter the phosphorylation levels of PKA substrates and PKC substrates, while the competitive inhibitors Rp-cAMP and bisindolylmaleimide (BIM) do not. Altogether, our results show that both PKA and PKC participate in sperm motility regulation through a crosstalk in the signalling pathway. These results contribute to a better understanding of the mechanisms that govern motility in sea urchin sperm.

scholarly journals New insights from female bird song: towards an integrated approach to studying male and female communication roles

2019 ◽  
Vol 15 (4) ◽  
pp. 20190059 ◽  
Author(s):  
Katharina Riebel ◽  
Karan J. Odom ◽  
Naomi E. Langmore ◽  
Michelle L. Hall
Keyword(s):  
Sex Differences ◽  
Experimental Tests ◽  
Integrated Approach ◽  
Short Review ◽  
Bird Song ◽  
Male And Female ◽  
Female Song ◽  
Female Bird ◽  
Subsequent Loss ◽  
And Function

Historically, bird song has been regarded as a sex-specific signalling trait; males sing to attract females and females drive the evolution of signal exaggeration by preferring males with ever more complex songs. This view provides no functional role for female song. Historic geographical research biases generalized pronounced sex differences of phylogenetically derived northern temperate zone songbirds to all songbirds. However, we now know that female song is common and that both sexes probably sang in the ancestor of modern songbirds. This calls for research on adaptive explanations and mechanisms regulating female song, and a reassessment of questions and approaches to identify selection pressures driving song elaboration in both sexes and subsequent loss of female song in some clades. In this short review and perspective we highlight newly emerging questions and propose a research framework to investigate female song and song sex differences across species. We encourage experimental tests of mechanism, ontogeny, and function integrated with comparative evolutionary analyses. Moreover, we discuss the wider implications of female bird song research for our understanding of male and female communication roles.

scholarly journals Moving to the beat: a review of mammalian sperm motility regulation

2006 ◽  
Vol 18 (2) ◽  
pp. 25 ◽  
Author(s):  
Regina M. Turner
Keyword(s):  
Sperm Motility ◽  
Male Fertility ◽  
Current Understanding ◽  
Present Review ◽  
Mammalian Sperm ◽  
Motility Regulation ◽  
Underlying Causes ◽  
Fertility Analysis

Because it is generally accepted that a high percentage of poorly motile or immotile sperm will adversely affect male fertility, analysis of sperm motility is a central part of the evaluation of male fertility. In spite of its importance to fertility, poor sperm motility remains only a description of a pathology whose underlying cause is typically poorly understood. The present review is designed to bring the clinician up to date with the most current understanding of the mechanisms that regulate sperm motility and to raise questions about how aberrations in these mechanisms could be the underlying causes of this pathology.

scholarly journals RATIO PENGENCERAN SPERMA TERHADAP MOTILITAS SPERMATOZOA, FERTILITAS DAN DAYA TETAS IKAN LELE (Clarias sp.)

2011 ◽  
Vol 7 (1) ◽  
pp. 48 ◽  
Author(s):  
Yulianty Adipu ◽  
Hengky J Sinjal ◽  
Juliaan Watung
Keyword(s):  
Experimental Design ◽  
Sperm Motility ◽  
Dilution Ratio ◽  
Male And Female ◽  
Egg Hatchability ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Female Weight

This study was aimed to determine the effect of the dilution ratio of sperm with optimal NaCl and fructose on the motility of the catfish, Clarias sp., spermatozoa, fertility and hatchability of eggs. Catfish used in this study consisted of one parent pairs (male and female weight of 1000 grams weight of 1500 g). NaCl and fructose solution were diluted with aquabidest. The observation was conducted on the motility of spermatozoa, fertility and hatchability of eggs. The experimental design used completely randomized design (CRD). Dilution ratio is 1: 0, 1, 20, 1: 40, 1; 60, 1: 80, and 1: 100 with replicated 3 times. Observations were carried out soon after the sperm mixed with diluents. Fertility occurred 12 hours after fertilization. Egg hatchability was observed after fertilization. The results showed that the ratio of dilution gave significant effect on the sperm motility, fertility and hatchability of the eggs. This research found that the dilution ratio 1: 60 was the best treatment with the average sperm motility of 96. 66%, fertility of 71, 66 5% and egg hatchability of 70%.

“A case report – Ayurvedic management of Asthenospermia.”

2020 ◽  
Vol 8 (02) ◽  
Author(s):  
Kavita Bhavarthe
Keyword(s):  
Case Report ◽  
Sperm Motility ◽  
Semen Analysis ◽  
Male Partner ◽  
Female Partner ◽  
Male And Female ◽  
Female Partners ◽  
Ayurvedic Treatment

Failure of conception and failed to reproduce is a curse in the society, the couple faces a lot of mental agony. A case of Asthenospermia treated with Ayurvedic management with truthful result is presented here. The case of infertility, married since 2 years having age of 29 and 21 years of male and female partners respectively. They were having H/O using contraceptive for 6 months after marriage. Thereafter the couple are not using any contraceptive for 1 year. Failure to conceive within 1 year she came for Ayurvedic treatment. After investigating the couple, it was found that clinically with follicular study of female partner was WNL, while semen analysis of male partner shows Asthenospermia. Thereafter male partner was given Ayurvedic treatment for 3 months, which caused increased in sperm motility and after 7 months the couple get conceived. 

Role of the Na+/Ca2+ exchanger in calcium homeostasis and human sperm motility regulation

2006 ◽  
Vol 63 (2) ◽  
pp. 66-76 ◽  
Author(s):  
Zoltán Krasznai ◽  
Zoárd Tibor Krasznai ◽  
Masaaki Morisawa ◽  
Zsuzsa Kassai Bazsáné ◽  
Zoltán Hernádi ◽  
...  
Keyword(s):  
Sperm Motility ◽  
Calcium Homeostasis ◽  
Human Sperm ◽  
Motility Regulation
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