Out of gas and low on sperm?

(Kyoto University) Sperm are constantly replenished in the adult male body. Understanding the workings of stem cells responsible for this replenishment is expected to shed light on why male fertility diminishes with age, and possibly lead to new treatments for infertility.
Source: EurekAlert! - Social and Behavioral Science - Category: Global & Universal Source Type: news

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Conditions:   Infertility, Female;   Endometrium Intervention:   Procedure: UC-MSCs therapy Sponsor:   The Affiliated Nanjing Drum Tower Hospital of Nanjing University Medical School Recruiting
Source: ClinicalTrials.gov - Category: Research Source Type: clinical trials
Authors: Zarandi NP, Galdon G, Kogan S, Atala A, Sadri-Ardekani H Abstract While the survival rate of children with cancer is increasing, preserving fertility for prepubertal boys is still a challenge. Although intracytoplasmic sperm injection (ICSI) using frozen sperms has revolutionized infertility treatment, it is not applicable for the patients who undergo chemotherapy before puberty since spermatogenesis has not begun. Therefore, preserving spermatogonial stem cells (SSCs) as an experimental option can be provided to prepubertal patients at a risk of damage or loss of their SSCs due to cancer treatments and de...
Source: Stem Cells and Cloning: Advances and Applications - Category: Stem Cells Tags: Stem Cells Cloning Source Type: research
Intrauterine adhesions (IUA) are the most common cause of uterine infertility and are caused by endometrium fibrotic regeneration following severe damage to the endometrium. Although current stem cell treatmen...
Source: Stem Cell Research and Therapy - Category: Stem Cells Authors: Tags: Research Source Type: research
ConclusionsEvidence does not yet support clinical application of SSCs in humans. However, significant progress in the in vitro and in vivo development of SSCs, including differentiation into functional germ cells, gives reason for cautious optimism for future research.
Source: Arab Journal of Urology - Category: Urology & Nephrology Source Type: research
In this study, we reported a comprehensive genome-wide DNA methylation landscape in chicken germ cells, and transcriptomic dynamics was also presented. By uncovering DNA methylation patterns on individual genes, some genes accurately modulated by DNA methylation were found to be associated with cancers and virus infection, e.g., AKT1 and CTNNB1. Chicken-unique markers were also discovered for identifying male germ cells. Importantly, integrated epigenetic mechanisms were explored during male germ cell differentiation, which provides deep insight into the epigenetic processes associated with male germ cell differentiation a...
Source: Stem Cell Reports - Category: Stem Cells Source Type: research
Publication date: 8 May 2018Source: Stem Cell Reports, Volume 10, Issue 5Author(s): Satoshi Watanabe, Mito Kanatsu-Shinohara, Narumi Ogonuki, Shogo Matoba, Atsuo Ogura, Takashi ShinoharaSummaryAdeno-associated virus (AAV) penetrates the blood-brain barrier, but it is unknown whether AAV penetrates other tight junctions. Genetic manipulation of testis has been hampered by the basement membrane of seminiferous tubules and the blood-testis barrier (BTB), which forms between Sertoli cells and divides the tubules into basal and adluminal compartments. Here, we demonstrate in vivo genetic manipulation of spermatogonial stem...
Source: Stem Cell Reports - Category: Stem Cells Source Type: research
ConclusionsEvidence does not yet support clinical application of SSCs in humans. However, significant progress in the in vitro and in vivo development of SSCs, including differentiation into functional germ cells, gives reason for cautious optimism for future research.
Source: Arab Journal of Urology - Category: Urology & Nephrology Source Type: research
In this study, we reported a comprehensive genome-wide DNA methylation landscape in chicken germ cells, and transcriptomic dynamics was also presented. By uncovering DNA methylation patterns on individual genes, some genes accurately modulated by DNA methylation were found to be associated with cancers and virus infection, e.g., AKT1 and CTNNB1. Chicken-unique markers were also discovered for identifying male germ cells. Importantly, integrated epigenetic mechanisms were explored during male germ cell differentiation, which provides deep insight into the epigenetic processes associated with male germ cell differentiation a...
Source: Stem Cell Reports - Category: Stem Cells Source Type: research
Publication date: 8 May 2018Source: Stem Cell Reports, Volume 10, Issue 5Author(s): Satoshi Watanabe, Mito Kanatsu-Shinohara, Narumi Ogonuki, Shogo Matoba, Atsuo Ogura, Takashi ShinoharaSummaryAdeno-associated virus (AAV) penetrates the blood-brain barrier, but it is unknown whether AAV penetrates other tight junctions. Genetic manipulation of testis has been hampered by the basement membrane of seminiferous tubules and the blood-testis barrier (BTB), which forms between Sertoli cells and divides the tubules into basal and adluminal compartments. Here, we demonstrate in vivo genetic manipulation of spermatogonial stem...
Source: Stem Cell Reports - Category: Stem Cells Source Type: research
(Shinshu University) A research team found a novel function of FGF2 in mammalian testis. Although it has demonstrated that both GDNF and FGF2 are the self-renewal factor for spermatogonial stem cells (SSCs) in vitro, present study revealed that FGF2 acts to facilitate the differentiation of SSCs in vivo. The understanding of molecular mechanism regulating SSCs has potential for future applications for male infertility treatment.
Source: EurekAlert! - Biology - Category: Biology Source Type: news
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