scholarly journals Fractionation of human spermatogenic cells using STA-PUT gravity sedimentation and their miRNA profiling

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Yun Liu ◽  
Minghui Niu ◽  
Chencheng Yao ◽  
Yanan Hai ◽  
Qingqing Yuan ◽  
...  
Keyword(s):  
Spermatogenic Cells ◽  
Mirna Profiling ◽  
Gravity Sedimentation

Annulate lamellae in the Sertoli cells of guinea pig testis after unilateral torsion of the spermatic cord

1984 ◽  
Vol 42 ◽  
pp. 196-197
Author(s):  
J. Chakraborty ◽  
A. P. Sinha Hikim ◽  
J. S. Jhunjhunwala
Keyword(s):  
Sertoli Cells ◽  
Guinea Pigs ◽  
Spermatic Cord ◽  
Present Report ◽  
Cell Types ◽  
Annulate Lamellae ◽  
Spermatogenic Cells ◽  
Electron Microscopic ◽  
Structural Details ◽  
First Time

Although the presence of annulate lamellae was noted in many cell types, including the rat spermatogenic cells, this structure was never reported in the Sertoli cells of any rodent species. The present report is based on a part of our project on the effect of torsion of the spermatic cord to the contralateral testis. This paper describes for the first time, the fine structural details of the annulate lamellae in the Sertoli cells of damaged testis from guinea pigs.One side of the spermatic cord of each of six Hartly strain adult guinea pigs was surgically twisted (540°) under pentobarbital anesthesia (1). Four months after induction of torsion, animals were sacrificed, testes were excised and processed for the light and electron microscopic investigations. In the damaged testis, the majority of seminiferous tubule contained a layer of Sertoli cells with occasional spermatogonia (Fig. 1). Nuclei of these Sertoli cells were highly pleomorphic and contained small chromatinic clumps adjacent to the inner aspect of the nuclear envelope (Fig. 2).

Restraint stress of male mice triggers apoptosis in spermatozoa and spermatogenic cells via activating the TNF-α system

Zygote ◽  
2020 ◽  
Vol 28 (2) ◽  
pp. 160-169 ◽  
Author(s):  
Jie Zhang ◽  
De-Ling Kong ◽  
Bin Xiao ◽  
Hong-Jie Yuan ◽  
Qiao-Qiao Kong ◽  
...  
Keyword(s):  
Psychological Stress ◽  
Restraint Stress ◽  
Semen Quality ◽  
Sperm Quality ◽  
Fertilization Rate ◽  
Seminiferous Tubules ◽  
Spermatogenic Cells ◽  
Male Mice ◽  
Testicular Cells ◽  
Tnf Α

SummaryStudies have indicated that psychological stress impairs human fertility and that various stressors can induce apoptosis of testicular cells. However, the mechanisms by which psychological stress on males reduces semen quality and stressors induce apoptosis in testicular cells are largely unclear. Using a psychological (restraint) stress mouse model, we tested whether male psychological stress triggers apoptosis of spermatozoa and spermatogenic cells through activating tumour necrosis factor (TNF)-α signalling. Wild-type or TNF-α−/− male mice were restrained for 48 h before examination for apoptosis and expression of TNF-α and TNF receptor 1 (TNFR1) in spermatozoa, epididymis, seminiferous tubules and spermatogenic cells. The results showed that male restraint significantly decreased fertilization rate and mitochondrial membrane potential, while increasing levels of malondialdehyde, active caspase-3, TNF-α and TNFR1 in spermatozoa. Male restraint also increased apoptosis and expression of TNF-α and TNFR1 in caudae epididymides, seminiferous tubules and spermatogenic cells. Sperm quality was also significantly impaired when spermatozoa were recovered 35 days after male restraint. The restraint-induced damage to spermatozoa, epididymis and seminiferous tubules was significantly ameliorated in TNF-α−/− mice. Furthermore, incubation with soluble TNF-α significantly reduced sperm motility and fertilizing potential. Taken together, the results demonstrated that male psychological stress induces apoptosis in spermatozoa and spermatogenic cells through activating the TNF-α system and that the stress-induced apoptosis in spermatogenic cells can be translated into impaired quality in future spermatozoa.

scholarly journals miRNA profiling in autism spectrum disorder in China

Genomics Data ◽  
2015 ◽  
Vol 6 ◽  
pp. 108-109 ◽  
Author(s):  
Fengzhen Huang ◽  
Tieqiao Zhou ◽  
Xiaoxi Yao ◽  
Jiping Yi ◽  
Fei Zhou ◽  
...  
Keyword(s):  
Autism Spectrum Disorder ◽  
Autism Spectrum ◽  
Spectrum Disorder ◽  
Mirna Profiling

scholarly journals Isolation of spermatogenic cells from the cynomolgus macaque testis with flow cytometry

2021 ◽  
Vol 2 (1) ◽  
pp. 100294
Author(s):  
Xianzhong Lau ◽  
Pearly Jean Ai Yong ◽  
Charles Kang Liang Lou ◽  
Prabhakaran Munusamy ◽  
Mahesh Sangrithi
Keyword(s):  
Flow Cytometry ◽  
Cynomolgus Macaque ◽  
Spermatogenic Cells

scholarly journals Detection of human cytomegalovirus in motile spermatozoa and spermatogenic cells in testis organotypic culture

Herpesviridae ◽  
2011 ◽  
Vol 2 (1) ◽  
pp. 7 ◽  
Author(s):  
Victor A Naumenko ◽  
Yurii A Tyulenev ◽  
Sergei A Yakovenko ◽  
Lubov' F Kurilo ◽  
Ludmila V Shileyko ◽  
...  
Keyword(s):  
Human Cytomegalovirus ◽  
Organotypic Culture ◽  
Spermatogenic Cells

Decreased expression of DNA methyltransferases in the testes of patients with non-obstructive azoospermia leads to changes in global DNA methylation levels

2019 ◽  
Vol 31 (8) ◽  
pp. 1386 ◽  
Author(s):  
Fatma Uysal ◽  
Gokhan Akkoyunlu ◽  
Saffet Ozturk
Keyword(s):  
Dna Methylation ◽  
Male Infertility ◽  
De Novo ◽  
Biological Effects ◽  
Testicular Biopsy ◽  
Round Spermatid ◽  
Dna Methyltransferases ◽  
Global Dna Methylation ◽  
Obstructive Azoospermia ◽  
Spermatogenic Cells

DNA methylation plays key roles in epigenetic regulation during mammalian spermatogenesis. DNA methyltransferases (DNMTs) function in de novo and maintenance methylation processes by adding a methyl group to the fifth carbon atom of the cytosine residues within cytosine–phosphate–guanine (CpG) and non-CpG dinucleotide sites. Azoospermia is one of the main causes of male infertility, and is classified as obstructive (OA) or non-obstructive (NOA) azoospermia based on histopathological characteristics. The molecular background of NOA is still largely unknown. DNA methylation performed by DNMTs is implicated in the transcriptional regulation of spermatogenesis-related genes. The aim of the present study was to evaluate the cellular localisation and expression levels of the DNMT1, DNMT3A and DNMT3B proteins, as well as global DNA methylation profiles in testicular biopsy samples obtained from men with various types of NOA, including hypospermatogenesis (hyposperm), round spermatid (RS) arrest, spermatocyte (SC) arrest and Sertoli cell-only (SCO) syndrome. In the testicular biopsy samples, DNMT1 expression and global DNA methylation levels decreased gradually from the hyposperm to SCO groups (P<0.05). DNMT3A expression was significantly decreased in the RS arrest, SC arrest and SCO groups compared with the hyposperm group (P<0.05). DNMT3B expression was significantly lower in the RS arrest and SCO groups than in the hyposperm group (P<0.05). Although both DNMT1 and DNMT3A were localised in the cytoplasm and nucleus of the spermatogenic cells, staining for DNMT3B was more intensive in the nucleus of spermatogenic cells. In conclusion, the findings suggest that significant changes in DNMT expression and global DNA methylation levels in spermatogenic cells may contribute to development of male infertility in the NOA groups. Further studies are needed to determine the molecular biological effects of the altered DNMT expression and DNA methylation levels on development of male infertility.

Identification Of Mirna Profiling In Epicardial Adipose Tissue Of Patients With Atherosclerosis

2019 ◽  
Vol 287 ◽  
pp. e194
Author(s):  
F. Guclu-Geyik ◽  
P. Koseoglu ◽  
S.D. Ozsoy ◽  
H.K. Cetin ◽  
O.O. Balkanay ◽  
...  
Keyword(s):  
Adipose Tissue ◽  
Epicardial Adipose Tissue ◽  
Mirna Profiling

In vitro studies of DNA damage and repair in spermatogenic cells from rats and humans

1998 ◽  
Vol 95 ◽  
pp. 213
Author(s):  
C. Bjørge ◽  
A.-K. Olsen ◽  
R. Wiger ◽  
G. Brunborg ◽  
K. Haug ◽  
...  
Keyword(s):  
Dna Damage ◽  
In Vitro Studies ◽  
Spermatogenic Cells ◽  
Dna Damage And Repair
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