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https://www.readbyqxmd.com/read/28539487/characterization-of-the-mammalian-rna-exonuclease-5-nef-sp-as-a-testis-specific-nuclear-3-%C3%A2-5-exoribonuclease
#1
Sara Silva, David Homolka, Ramesh S Pillai
Ribonucleases catalyse maturation of functional RNAs or mediate degradation of cellular transcripts, activities that are critical for gene expression control. Here we identify a previously uncharacterized mammalian nuclease family member NEF-sp [RNA exonuclease 5 (REXO5) or LOC81691] as a testis-specific factor. Recombinant human NEF-sp demonstrates a divalent metal ion-dependent 3'→5' exoribonuclease activity. This activity is specific to single-stranded RNA substrates and is independent of their length...
May 24, 2017: RNA
https://www.readbyqxmd.com/read/28531375/mouse-minipuberty-coincides-with-gonocyte-transformation-into-spermatogonial-stem-cells-a-model-for-human-minipuberty
#2
Ruili Li, Amanda Vannitamby, Sarah S K Yue, David Handelsman, John Hutson
As the transient postnatal hormone surge in humans, known as 'minipuberty', occurs simultaneously with key steps in germ-cell development, we investigated whether similar changes occur in the hypothalamic-pituitary-testicular axis of neonatal mice at a time that would coincide with gonocyte transformation into spermatogonial stem cells (SSC). Serum and testes were collected from C57Bl/6 mice at embryonic Day 17 (E17), birth (postnatal Day 0; P0) and daily until P10. Serum FSH and testosterone levels in both serum and testes were analysed and gene expression of FSH receptor (Fshr), luteinising hormone receptor (Lhr), anti-Müllerian hormone (Amh), octamer-binding transcription factor 4 (Oct-4), membrane type 1 metalloprotease (Mt1-mmp), proto-oncogene C-kit and promyelocytic leukaemia zinc finger (Plzf ) was quantified by real-time polymerase chain reaction...
May 23, 2017: Reproduction, Fertility, and Development
https://www.readbyqxmd.com/read/28531178/zebrafish-exposure-to-environmentally-relevant-concentration-of-depleted-uranium-impairs-progeny-development-at-the-molecular-and-histological-levels
#3
Olivier Armant, Kewin Gombeau, Sophia Murat El Houdigui, Magali Floriani, Virginie Camilleri, Isabelle Cavalie, Christelle Adam-Guillermin
Uranium is an actinide naturally found in the environment. Anthropogenic activities lead to the release of increasing amounts of uranium and depleted uranium (DU) in the environment, posing potential risks to aquatic organisms due to radiological and chemical toxicity of this radionucleide. Although environmental contaminations with high levels of uranium have already been observed, chronic exposures of non-human species to levels close to the environmental quality standards remain scarcely characterized. The present study focused on the identification of the molecular pathways impacted by a chronic exposure of zebrafish to 20 μg/L of DU during 10 days...
2017: PloS One
https://www.readbyqxmd.com/read/28525721/development-and-application-of-a-screening-method-of-absolute-qpcr-to-detect-the-abuse-of-sex-steroid-hormone-administration-in-male-bovine
#4
Laura Starvaggi Cuccuzza, Bartolomeo Biolatti, Sara Divari, Paola Pregel, Frine E Scaglione, Alessandra Sereno, Francesca T Cannizzo
A method for absolute quantification of regucalcin gene by quantitative PCR was developed to confirm that the decrease of regucalcin gene expression in the testis is a valid biomarker for detection of sex steroid hormone treatment in bovine husbandry. An external standard curve was developed with TaqMan technology. Based on in vivo experiments, specificity, sensitivity and criterion value of this potential biomarker were calculated by means of a ROC curve. Then, regucalcin gene expression was evaluated in beef and veal calves for human consumption...
May 19, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28521304/genistein-up-regulates-mir-20a-to-disrupt-spermatogenesis-via-targeting-limk1
#5
Hao Gu, Wei Wu, Beilei Yuan, Qiuqin Tang, Dan Guo, Yiqiu Chen, Yankai Xia, Lingqing Hu, Daozhen Chen, Jiahao Sha, Xinru Wang
Genistein (GEN) is one of the isoflavones that has effect on male reproduction. However, the underlying mechanism remains unknown. miRNAs are a type of small non-coding RNAs that play important roles in spermatogenesis. We measured the GEN levels and miR-17-92 cluster expression in infertile subjects and found that miR-17-92 might be involved in GEN induced abnormal spermatogenesis. To clarify, we fed adult ICR mice with different doses of GEN (0, 0.5, 5, 50 and 250 mg/kg/day) for 35 days to study the underlying mechanism...
May 5, 2017: Oncotarget
https://www.readbyqxmd.com/read/28520534/cpg-island-methylation-correlates-with-the-use-of-alternative-promoter-for-usp44-gene-expression-in-human-pluripotent-stem-cells-and-testis
#6
Philippe Tropel, Laura Jung, Cécile André, Adeline Ndandougou, Stéphane Viville
Deubiquitinating enzymes may play a major regulatory role in pluripotent stem cells (PSCs) but few studies have investigated this topic. Within this family of enzymes, we found that the ubiquitin specific peptidase, USP44, is highly expressed in embryonic stem cells, induced PSCs and testes as compared to differentiated progenies and somatic organs. Analysis by qPCR and 5'RACE showed that alternate promoters are responsible for expression in PSCs and organs. We noticed 7 regions of transcription initiation, some of them with cell- or tissue-specific activity...
May 18, 2017: Stem Cells and Development
https://www.readbyqxmd.com/read/28513607/variants-in-ttc25-affect-autistic-trait-in-patients-with-autism-spectrum-disorder-and-general-population
#7
Dina Vojinovic, Nathalie Brison, Shahzad Ahmad, Ilse Noens, Irene Pappa, Lennart C Karssen, Henning Tiemeier, Cornelia M van Duijn, Hilde Peeters, Najaf Amin
Autism spectrum disorder (ASD) is a highly heritable neurodevelopmental disorder with a complex genetic architecture. To identify genetic variants underlying ASD, we performed single-variant and gene-based genome-wide association studies using a dense genotyping array containing over 2.3 million single-nucleotide variants in a discovery sample of 160 families with at least one child affected with non-syndromic ASD using a binary (ASD yes/no) phenotype and a quantitative autistic trait. Replication of the top findings was performed in Psychiatric Genomics Consortium and Erasmus Rucphen Family (ERF) cohort study...
May 17, 2017: European Journal of Human Genetics: EJHG
https://www.readbyqxmd.com/read/28510469/outer-dense-fiber-proteins-bridging-between-male-infertility-and-cancer
#8
Faezeh Azizi, Soudeh Ghafouri-Fard
BACKGROUND: The similarities between gametogenic and carcinogenesis processes have been noted for more than decades. Among prominent similarities between these two processes is expression of a group of antigens, namely cancer-testis antigens in both the testes and various cancer tissues. Outer dense fiber (ODF) proteins are testis-specific proteins localized to sperm tails and involved in sperm motility. METHODS: We performed a computerized search of the MEDLINE/PUBMED databases with keywords "outer dense fiber, ODF, cancer, testis, gametogenesis and infertility"...
May 2017: Archives of Iranian Medicine
https://www.readbyqxmd.com/read/28487282/regulation-of-spermatogenesis-by-a-local-functional-axis-in-the-testis-role-of-the-basement-membrane-derived-noncollagenous-1-domain-peptide
#9
Haiqi Chen, Dolores D Mruk, Will M Lee, C Yan Cheng
Spermatogenesis takes place in the epithelium of the seminiferous tubules of the testes, producing millions of spermatozoa per day in an adult male in rodents and humans. Thus, multiple cellular events that are regulated by an array of signaling molecules and pathways are tightly coordinated to support spermatogenesis. Here, we report findings of a local regulatory axis between the basement membrane (BM), the blood-testis barrier (BTB), and the apical ectoplasmic specialization (apical ES; a testis-specific, actin-rich adherens junction at the Sertoli cell-spermatid interface) to coordinate cellular events across the seminiferous epithelium during the epithelial cycle...
May 9, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28483799/female-to-male-sex-reversal-associated-with-unique-xp21-2-deletion-disrupting-genomic-regulatory-architecture-of-the-dosage-sensitive-sex-reversal-region
#10
Pankaj Dangle, María Sol Touzon, Miguel Reyes-Múgica, Selma F Witchel, Aleksandar Rajkovic, Francis X Schneck, Svetlana A Yatsenko
BACKGROUND: The XX male disorder of sex development (DSD) is a rare condition that is most commonly associated with the presence of the SRY gene on one of the X chromosomes due to unequal crossing-over between sex chromosomes during spermatogenesis. However, in about 20% of the XX male individuals, SRY is missing, although these persons have at least some testis differentiation. The genetic basis of genital ambiguity and the mechanisms triggering testis development in such patients remain unknown...
May 8, 2017: Journal of Medical Genetics
https://www.readbyqxmd.com/read/28482050/parallel-assessment-of-the-effects-of-bisphenol-a-and-several-of-its-analogs-on-the-adult-human-testis
#11
C Desdoits-Lethimonier, L Lesné, P Gaudriault, D Zalko, J P Antignac, Y Deceuninck, C Platel, N Dejucq-Rainsford, S Mazaud-Guittot, B Jégou
STUDY QUESTION: Are bisphenol A (BPA) and BPA analogs (BPA-A) safe for male human reproductive function? SUMMARY ANSWER: The endocrine function of human testes explants [assessed by measuring testosterone and insulin-like factor 3 (INSL3)] was impacted by exposure of the human adult testis explants to BPA/BPA-A. WHAT IS KNOWN ALREADY: The few epidemiologic studies performed suggest that bisphenols have potential endocrine disruptive properties, but they did not identify clear and direct patterns of endocrine disruption...
May 8, 2017: Human Reproduction
https://www.readbyqxmd.com/read/28480994/association-of-human-development-index-with-global-bladder-kidney-prostate-and-testis-cancer-incidence-and-mortality
#12
Alyssa K Greiman, James S Rosoff, Sandip M Prasad
OBJECTIVES: To describe contemporary worldwide age-standardized incidence and mortality rates for bladder, kidney, prostate and testis cancer and their association with development. MATERIALS AND METHODS: We obtained gender-specific, age-standardized incidence and mortality rates for 184 countries and 16 major world regions from the GLOBOCAN 2012 database. We compared the mortality-to-incidence ratios (MIRs) at national and regional levels in males and females, and assessed the association with socio-economic development using the 2014 United Nations Human Development Index (HDI)...
May 8, 2017: BJU International
https://www.readbyqxmd.com/read/28463728/binding-of-bisphenol-f-a-bisphenol-analogue-to-calf-thymus-dna-by-multi-spectroscopic-and-molecular-docking-studies
#13
Afia Usman, Masood Ahmad
BPF (Bisphenol-F), a member of the bisphenol family, having a wide range of industrial applications is gradually replacing Bisphenol-A. It is a recognized endocrine disrupting chemical (EDC). EDCs have been implicated in increased incidences of breast, prostate and testis cancers besides diabetes, obesity and decreased fertility. Due to the adverse effects of EDCs on human health, attempts have been directed towards their mechanism of toxicity especially at the molecular level. Hence, to understand the mechanism at the DNA level, interaction of BPF with calf thymus DNA was studied employing multi-spectroscopic, voltammetric and molecular docking techniques...
April 29, 2017: Chemosphere
https://www.readbyqxmd.com/read/28459202/estradiol-via-estrogen-receptor-beta-influences-ros-levels-through-the-transcriptional-regulation-of-sirt3-in-human-seminoma-tcam-2-cells
#14
Salvatore Panza, Marta Santoro, Francesca De Amicis, Catia Morelli, Valentina Passarelli, Patrizia D'Aquila, Francesca Giordano, Erika Cione, Giuseppe Passarino, Dina Bellizzi, Saveria Aquila
Human testis, gonocytes, and adult germ cells mainly express estrogen receptor beta, and estrogen receptor beta loss is associated with advanced tumor stage; however, the molecular mechanisms of estrogen receptor beta-protective effects are still to be defined. Herein, we provide evidence that in human seminoma TCam-2 cells, E2 through estrogen receptor beta upregulates the mitochondrial deacetylase sirtuin-3 at protein and messenger RNA levels. Specifically, E2 increases sirtuin-3 expression through a transcriptional mechanism due to the occupancy of sirtuin-3 promoter by estrogen receptor beta, together with the transcription factor Sp1 as evidenced by Chip reChIp assay...
May 2017: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
https://www.readbyqxmd.com/read/28459107/a-genomic-atlas-of-human-adrenal-and-gonad-development
#15
Ignacio Del Valle, Federica Buonocore, Andrew J Duncan, Lin Lin, Martino Barenco, Rahul Parnaik, Sonia Shah, Mike Hubank, Dianne Gerrelli, John C Achermann
BACKGROUND: In humans, the adrenal glands and gonads undergo distinct biological events between 6-10 weeks post conception (wpc), such as testis determination, the onset of steroidogenesis and primordial germ cell development. However, relatively little is currently known about the genetic mechanisms underlying these processes. We therefore aimed to generate a detailed genomic atlas of adrenal and gonad development across these critical stages of human embryonic and fetal development...
April 7, 2017: Wellcome Open Research
https://www.readbyqxmd.com/read/28454390/expression-of-novel-cancer-testis-antigen-tmem31-increases-during-metastatic-melanoma-progression
#16
Jiaqiang Li, Xiaowen Zou, Cailing Li, Jianhua Zhong, Yan Chen, Xiaoyue Zhang, Fuming Qi, Mengshuo Li, Zhiming Cai, Aifa Tang
Cancer/testis (CT) antigens are promising targets for immunotherapy due to their restricted expression in the germ cells of the testis in healthy tissue and high immunogenicity. The aim of the present study was to determine whether transmembrane protein 31 (TMEM31) is a CT antigen and to investigate the pattern of TMEM31 expression during the progression of melanoma. The pattern of expression of human TMEM31 mRNA in multiple human tissues was determined through reverse transcription-polymerase chain reaction analysis...
April 2017: Oncology Letters
https://www.readbyqxmd.com/read/28454301/immunohistochemical-profile-of-ing3-protein-in-normal-and-cancerous-tissues
#17
Wen-Feng Gou, Xue-Feng Yang, Dao-Fu Shen, Shuang Zhao, Hong-Zhi Sun, Jun-Sheng Luo, Hua-Chuan Zheng
The inhibitor of growth family, member 3 (ING3) protein may be capable of blocking the cell cycle via activating p53-transactivated promoters of p21 and Bcl2-associated X protein, and may induce apoptosis via a Fas/caspase-8-dependent signaling pathway. In the present study, immunohistochemistry was performed in order to characterize the expression profile of ING3 protein in tissue microarrays containing mouse and human normal tissue, human hepatocellular (n=62), renal clear cell (n=62), pancreatic (n=62), esophageal squamous cell (n=45), cervical squamous cell (n=31), breast (n=144), gastric (n=196), colorectal (n=96), ovarian (n=208), endometrial (n=96) and lung carcinoma (n=192)...
March 2017: Oncology Letters
https://www.readbyqxmd.com/read/28446800/oxidative-stress-evoked-damages-on-rat-sperm-and-attenuated-antioxidant-status-on-consumption-of-aspartame
#18
I Ashok, P S Poornima, D Wankhar, R Ravindran, R Sheeladevi
Although several studies on toxic effect of aspartame metabolite have been studied, controversial reports over the use of aspartame owing to the fact that it releases methanol as one of its metabolite during metabolism exist. This present study is proposed to investigate whether aspartame (40 mg kg(-1) b.wt) administration for 90 days could induce oxidative stress and alter antioxidant status of epididymal sperm in Wistar strain male albino rats. To mimic the human methanol metabolism, methotrexate (MTX)-treated rats were included to study the effects of aspartame...
April 27, 2017: International Journal of Impotence Research
https://www.readbyqxmd.com/read/28446726/low-concentration-of-bpa-induces-mice-spermatocytes-apoptosis-via-gpr30
#19
Chaoliang Wang, Jianxiang Zhang, Qi Li, Tianbiao Zhang, Zishi Deng, Jing Lian, Donghui Jia, Rui Li, Tao Zheng, Xiaoju Ding, Fan Yang, Chao Ma, Rui Wang, Weixing Zhang, Jian Guo Wen
Bisphenol A (BPA) acts as xenoestrogen and has a great impact on disorders of human reproductive system. However, the mechanism through which BPA can affect human testicular function remains to be indentified. GPR30 is a novel membrane estrogen receptor with high-affinity and low-capacity binding to estrogens. We demonstrated that estrogen receptor α (ERα), estrogen receptor β (ERβ) as well as GPR30 are expressed in mouse spermatocyte-derived GC-2 cells using Real-time PCR. We treated the cells with different doses of BPA and found that even low doses of BPA can inhibit GC-2 cell growth using MTT assay...
April 7, 2017: Oncotarget
https://www.readbyqxmd.com/read/28446200/human-germ-stem-cell-specific-gene-tex19-influences-cancer-cell-proliferation-and-cancer-prognosis
#20
Vicente Planells-Palop, Ali Hazazi, Julia Feichtinger, Jana Jezkova, Gerhard Thallinger, Naif O Alsiwiehri, Mikhlid Almutairi, Lee Parry, Jane A Wakeman, Ramsay J McFarlane
BACKGROUND: Cancer/testis (CT) genes have expression normally restricted to the testis, but become activated during oncogenesis, so they have excellent potential as cancer-specific biomarkers. Evidence is starting to emerge to indicate that they also provide function(s) in the oncogenic programme. Human TEX19 is a recently identified CT gene, but a functional role for TEX19 in cancer has not yet been defined. METHODS: siRNA was used to deplete TEX19 levels in various cancer cell lines...
April 26, 2017: Molecular Cancer
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