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https://www.readbyqxmd.com/read/29775925/exposure-to-tris-1-3-dichloro-2-propyl-phosphate-for-two-generations-decreases-fecundity-of-zebrafish-at-environmentally-relevant-concentrations
#1
Yongkang Zhang, Meng Li, Shuying Li, Qiangwei Wang, Guonian Zhu, Guanyong Su, Robert J Letcher, Chunsheng Liu
Previous studies reported that exposure to environmentally relevant concentrations of TDCIPP significantly decreased the number of cumulative eggs in zebrafish, but effects on the quantity of eggs and sperms remained unknown. Therefore, in this study, effects of TDCIPP on yolk diameter, surface morphology of eggs, sperm density and total motility were evaluated. First generation (F0) zebrafish larvae (Danio rerio) were exposed to 0, 50, 500 or 5000 ng/L tris(1,3-dichloro-2-propyl) phosphate (TDCIPP) from 14 days post fertilization (dpf) to 120 dpf...
May 14, 2018: Aquatic Toxicology
https://www.readbyqxmd.com/read/29771299/at-the-crossroads-of-fate-somatic-cell-lineage-specification-in-the-fetal-gonad
#2
Emmi Rotgers, Anne Jørgensen, Humphrey Hung-Chang Yao
The reproductive endocrine systems are vastly different between male and female. This sexual dimorphism of endocrine milieu originates from sex-specific differentiation of the somatic cells in the gonads during fetal life. The majority of gonadal somatic cells arise from the adrenogonadal primordium. After separation of the adrenal and gonadal primordia, the gonadal somatic cells initiate sex-specific differentiation during gonadal sex determination with the specification of the supporting cell lineages: Sertoli cells in the testis vs...
May 15, 2018: Endocrine Reviews
https://www.readbyqxmd.com/read/29760424/parental-haplotype-specific-single-cell-transcriptomics-reveal-incomplete-epigenetic-reprogramming-in-human-female-germ-cells
#3
Ábel Vértesy, Wibowo Arindrarto, Matthias S Roost, Björn Reinius, Vanessa Torrens-Juaneda, Monika Bialecka, Ioannis Moustakas, Yavuz Ariyurek, Ewart Kuijk, Hailiang Mei, Rickard Sandberg, Alexander van Oudenaarden, Susana M Chuva de Sousa Lopes
In contrast to mouse, human female germ cells develop asynchronously. Germ cells transition to meiosis, erase genomic imprints, and reactivate the X chromosome. It is unknown if these events all appear asynchronously, and how they relate to each other. Here we combine exome sequencing of human fetal and maternal tissues with single-cell RNA-sequencing of five donors. We reconstruct full parental haplotypes and quantify changes in parental allele-specific expression, genome-wide. First we distinguish primordial germ cells (PGC), pre-meiotic, and meiotic transcriptional stages...
May 14, 2018: Nature Communications
https://www.readbyqxmd.com/read/29756331/mammalian-x-chromosome-dosage-compensation-perspectives-from-the-germ-line
#4
REVIEW
Mahesh N Sangrithi, James M A Turner
Sex chromosomes are advantageous to mammals, allowing them to adopt a genetic rather than environmental sex determination system. However, sex chromosome evolution also carries a burden, because it results in an imbalance in gene dosage between females (XX) and males (XY). This imbalance is resolved by X dosage compensation, which comprises both X chromosome inactivation and X chromosome upregulation. X dosage compensation has been well characterized in the soma, but not in the germ line. Germ cells face a special challenge, because genome wide reprogramming erases epigenetic marks responsible for maintaining the X dosage compensated state...
May 14, 2018: BioEssays: News and Reviews in Molecular, Cellular and Developmental Biology
https://www.readbyqxmd.com/read/29753846/role-of-hnf1%C3%AE-in-the-differential-diagnosis-from-other-germ-cell-tumors
#5
Anne-Laure Rougemont, Jean-Christophe Tille
Identification of the yolk sac tumor (YST) component in germ cell tumors (GCT) may prove challenging, and highly sensitive and specific immunohistochemical markers are still lacking. Preliminary data from the literature suggest that HNF1β may represent a sensitive marker of YST. The specificity of HNF1β has not been addressed in GCT. A cohort of 49 YST specimens from 45 patients was designed, occurring either as pure tumors, or as a component of a mixed GCT. Immunohistochemistry was conducted on whole tumor sections using HNF1β...
May 10, 2018: Human Pathology
https://www.readbyqxmd.com/read/29739453/spontaneous-renal-hemorrhage-secondary-to-choriocarcinoma-in-a-man-with-congenital-hypospadias-and-cryptorchidism-a-case-report-and-literature-review
#6
Yi Li, Gang Chen, Han Chen, Shuang Wen, Chao-Yu Xiong, Zi-Yi Yang, Yun-Xiao Zhu, Nathan Jeffreys
BACKGROUND: Choriocarcinoma is a rare malignant germ-cell tumour, most commonly found in adult women. It infrequently presents as spontaneous renal haemorrhage (SRH). Genital malformation and SRH secondary to choriocarcinoma has previously been only reported in females. We present what we believe to be the first case of a male patient with genital malformation (hypospadias and cryptorchidism) and SRH at presentation of choriocarcinoma. CASE PRESENTATION: A 25-year-old man presented to the department with intense pain in the right flank region and lower back...
May 8, 2018: BMC Cancer
https://www.readbyqxmd.com/read/29731491/oocyte-specific-gene-oog1-suppresses-the-expression-of-spermatogenesis-specific-genes-in-oocytes
#7
Shinnosuke Honda, Yuka Miki, Yuya Miyamoto, Yu Kawahara, Satoshi Tsukamoto, Hiroshi Imai, Naojiro Minami
Oog1, an oocyte-specific gene that encodes a protein of 425 amino acids, is present in five copies on mouse chromosomes 4 and 12. In mouse oocytes, Oog1 mRNA expression begins at embryonic day 15.5 and almost disappears by the late two-cell stage. Meanwhile, OOG1 protein is detectable in oocytes in ovarian cysts and disappears by the four-cell stage; the protein is transported to the nucleus in late one-cell to early two-cell stage embryos. In this study, we examined the role of Oog1 during oogenesis in mice...
May 3, 2018: Journal of Reproduction and Development
https://www.readbyqxmd.com/read/29707679/the-annual-reproductive-cycle-of-silurus-microdorsalis-a-korean-endemic-species
#8
Se-Un Ki, Won-Kyo Lee
The annual reproductive cycle of the Korean endemic slender catfish, Silurus microdorsalis , was examined histologically regarding water temperature and day length of habitat, gonadosomatic index (GSI), and development characteristics of female and male gonads. The maximum GSI value was found in May, 1.23±0.33 and 11.77±3.23 for male and female respectively (habitat water temperature 21.5°C/13.59hr day length). On the other hand, the minimal level was 0.63±0.10 in July (26.5°C/14.17) for male and 1.36±0...
March 2018: Balsaeng'gwa Saengsig
https://www.readbyqxmd.com/read/29702248/fertility-in-male-rats-disentangling-adverse-effects-of-arsenic-compounds
#9
Graziela Domingues de Almeida Lima, Marcela Nascimento Sertorio, Ana Cláudia Ferreira Souza, Tatiana Prata Menezes, Viviane Gorete Silveira Mouro, Nayara Magalhães, Jerusa Maria de Oliveira, Marc Henry, Mariana Machado-Neves
Arsenic impairs male reproductive functions. However, it is not clear whether different arsenic compounds similarly affect fertility. In this study, we compared the impact of sodium arsenite and arsenate on sperm quality and fertility. After 56 d exposure, male Wistar rats were mated and pregnant females were evaluated by fertility indexes. Clearly, exposure to 10 mg/L arsenite reduced daily sperm production via H2 O2 overproduction and germ cells loss. Animals from this group also showed a decrease in epididymal sperm counts and percentage of sperm with intact membranes...
April 24, 2018: Reproductive Toxicology
https://www.readbyqxmd.com/read/29701280/enhancing-nanos-expression-via-the-bacterial-tomo-protein-is-a-conserved-strategy-used-by-the-symbiont-wolbachia-to-fuel-germ-stem-cell-maintenance-in-infected-drosophila-females
#10
Manabu Ote, Daisuke Yamamoto
The toxic manipulator of oogenesis (TomO) protein has been identified in the wMel strain of Wolbachia that symbioses with the vinegar fly Drosophila melanogaster, as a protein that affects host reproduction. TomO protects germ stem cells (GSCs) from degeneration, which otherwise occurs in ovaries of host females that are mutant for the gene Sex-lethal (Sxl). We isolated the TomO homologs from wPip, a Wolbachia strain from the mosquito Culex quinquefasciatus. One of the homologs, TomOw Pip 1, exerted the GSC rescue activity in fly Sxl mutants when lacking its hydrophobic stretches...
April 27, 2018: Archives of Insect Biochemistry and Physiology
https://www.readbyqxmd.com/read/29699760/desire-to-have-children-among-transgender-people-in-germany-a-cross-sectional-multi-center-study
#11
Matthias K Auer, Johannes Fuss, Timo O Nieder, Peer Briken, Sarah V Biedermann, Günter K Stalla, Matthias W Beckmann, Thomas Hildebrandt
BACKGROUND: Many trans individuals undergo medical interventions that result in irreversible loss of fertility. Little is known about their desire to have children and attitudes toward fertility preservation options. AIM: To study how the desire for children and the use of fertility preservation options varies among trans women and trans men in different transitioning stages in Germany. METHODS: In this cross-sectional multi-center study, N = 99 trans women and N = 90 trans men were included...
May 2018: Journal of Sexual Medicine
https://www.readbyqxmd.com/read/29689462/macaque-homologs-of-kaposi-s-sarcoma-associated-herpesvirus-kshv-infect-germinal-center-lymphoid-cells-epithelial-cells-in-skin-and-gastrointestinal-tract-and-gonadal-germ-cells-in-naturally-infected-macaques
#12
Helle Bielefeldt-Ohmann, A Gregory Bruce, Kellie Howard, Minako Ikoma, Margaret E Thouless, Timothy M Rose
We developed a set of rabbit antisera to characterize infections by the macaque RV2 rhadinovirus homologs of KSHV. We analyzed tissues from rhesus and pig-tailed macaques naturally infected with rhesus rhadinovirus (RRV) or Macaca nemestrina rhadinovirus 2 (MneRV2). Our study demonstrates that RV2 rhadinoviruses have a tropism for epithelial cells, lymphocytes and gonadal germ cells in vivo. We observed latent infections in both undifferentiated and differentiated epithelial cells with expression of the latency marker, LANA...
April 21, 2018: Virology
https://www.readbyqxmd.com/read/29689290/multigenerational-effects-of-maternal-cigarette-smoke-exposure-during-pregnancy-on-sperm-counts-of-f1-and-f2-male-offspring
#13
Hye Jeong Lee, Na Young Choi, Yo Seph Park, Seung-Won Lee, Jin Seok Bang, Yukyeong Lee, Jae-Sung Ryu, Seong-Jin Choi, Sang-Hyub Lee, Gwang Soo Kim, Hyun Woo Chung, Kisung Ko, Kyuhong Lee, Kinarm Ko
Animal models and human studies showed that in utero cigarette smoke exposure decreases sperm counts of offspring. This study used a mouse model to investigate the effects of maternal exposure to cigarette smoke on reproductive systems in F1 and F2 male offspring. Female ICR mice were exposed either to clean air or to cigarette smoke during pregnancy at the post-implantation stage. Epididymal sperm counts were decreased in a cigarette smoke dose-dependent manner in F1 (by 40-60%) and F2 males (by 23-40%) at postnatal day 56...
April 21, 2018: Reproductive Toxicology
https://www.readbyqxmd.com/read/29689190/how-to-make-a-billion-parasites
#14
Eric S Haag, Te-Wen Lo
Transmission of the human parasite Brugia malayi relies on the sustained production of larvae in blood. In this issue of Developmental Cell,Foray et al. (2018) use methods developed in the model nematode C. elegans to reveal how a symbiotic bacterium supports the female germ cell development underlying this massive fecundity.
April 23, 2018: Developmental Cell
https://www.readbyqxmd.com/read/29685708/isolation-and-characterization-of-spermatogenic-cells-from-cattle-yak-and-cattleyak
#15
Mujahid Ali Shah, Chuanfei Xu, Shixin Wu, Wangsheng Zhao, Hui Luo, Chuanping Yi, Wenjing Liu, Xin Cai
Cattleyak forms the first generation in the cross-breeding of cattle (Bos taurus) and yak (Bos grunniens), the purpose of which is to increase the yak's performance in meat and milk production. The female cattleyak is fertile while the male remains sterile due to spermatogenic arrest. The spermatogenic cells (including spermatogonia and spermatocytes) of cattle, yak and cattleyak have not been successfully isolated so far. In this work, spermatogenic cells were isolated from these bovid species with the STA-PUT method that has been previously used for germ cell sorting in human and mouse, and the isolated cells could be used to investigate the mechanisms involved in male sterility observed in cattleyak...
April 17, 2018: Animal Reproduction Science
https://www.readbyqxmd.com/read/29679251/repressible-transgenic-sterilization-in-channel-catfish-ictalurus-punctatus-by-knockdown-of-primordial-germ-cell-genes-with-copper-sensitive-constructs
#16
Hanbo Li, Baofeng Su, Guyu Qin, Zhi Ye, Ahmed Elaswad, Ahmed Alsaqufi, Dayan A Perera, Zhenkui Qin, Ramji Odin, Khoi Vo, David Drescher, Dalton Robinson, Sheng Dong, Dan Zhang, Mei Shang, Nermeen Abass, Sanjay K Das, Max Bangs, Rex A Dunham
Repressible knockdown approaches were investigated to manipulate for transgenic sterilization in channel catfish, Ictalurus punctatus. Two primordial germ cell (PGC) marker genes, nanos and dead end, were targeted for knockdown and an off-target gene, vasa, was monitored. Two potentially copper-sensitive repressible promoters, yeast ctr3 (M) and ctr3-reduced (Mctr), were coupled with four knockdown strategies separately including: ds-sh RNA targeting the 5' end (N1) or 3' end (N2) of channel catfish nanos, full-length cDNA sequence of channel catfish nanos for overexpression (cDNA), and ds-sh RNA-targeting channel catfish dead end (DND)...
April 20, 2018: Marine Biotechnology
https://www.readbyqxmd.com/read/29678709/metastatic-non-gestational-choriocarcinoma-to-the-brain-a-case-report-and-proposed-treatment-recommendations
#17
Jason Duong, Hammad Ghanchi, Dan Miulli, Avneet Kahlon
OBJECTIVE: Non-gestational choriocarcinoma (NGC) is a rare germ cell tumor, reported less than 0.6% of all gestational tumors, and has a poor prognosis when metastasized. NGC is even less reported with metastasis to the brain. Gestational choriocarcinoma (GC) when metastasized to the brain has a higher morbidity and mortality but has been known to be a chemosensitive and radiosensitive lesion, and NGC is chemoresistant with an even worse prognosis. Currently, there is no consensus for treatment for metastatic NGC to the brain...
April 17, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29669732/efficient-expression-of-genes-in-the-drosophila-germline-using-a-uas-promoter-free-of-interference-by-hsp70-pirnas
#18
Steven Z DeLuca, Allan C Spradling
Controlling the expression of genes using a binary system involving the yeast GAL4 transcription factor has been a mainstay of Drosophila developmental genetics for nearly thirty years. However, most existing GAL4 expression constructs only function effectively in somatic cells, but not in germ cells during oogenesis, for unknown reasons. A special UAS promoter, UASp was created that does express during oogenesis, but the need to use different constructs for somatic and female germline cells has remained a significant technical limitation...
April 18, 2018: Genetics
https://www.readbyqxmd.com/read/29668062/long-term-outcomes-and-molecular-analysis-of-a-large-cohort-of-patients-with-46-xy-disorder-of-sex-development-due-to-partial-gonadal-dysgenesis
#19
Nathalia Lisboa Gomes, Antônio Marcondes Lerário, Aline Machado Zamboni, Daniela Rodrigues de Moraes, Thatiana Evilen da Silva, Ivo Jorge Prado Arnhold, Rafael Loch Batista, José Antônio Diniz Faria Júnior, Elaine F Costa, Mirian Y Nishi, Marlene Inacio, Sorahia Domenice, Berenice B Mendonca
BACKGROUND: Follow-up data on patients with 46,XY partial gonadal dysgenesis (PGD) until adulthood are scarce, making information on prognosis difficult. OBJECTIVE: To analyse the long-term outcomes of patients with 46,XY PGD regarding testosterone production, germ cell tumour risk, genotype, and psychosexual adaptation. METHODS: A retrospective longitudinal study of 33 patients (20 assigned male and 13 patients assigned female at birth). Molecular diagnosis was performed by Sanger sequencing or by targeted massively parallel sequencing of 63 genes related to disorders of sex development (DSDs)...
April 18, 2018: Clinical Endocrinology
https://www.readbyqxmd.com/read/29660606/generation-of-induced-pluripotent-stem-cells-from-a-patient-with-best-dystrophy-carrying-11q12-3-best1-vmd2-mutation
#20
Chih-Chien Hsu, Huai-En Lu, Jen-Hua Chuang, Yu-Ling Ko, Yi-Ching Tsai, Hsiao-Yun Tai, Aliaksandr A Yarmishyn, De-Kuang Hwang, Mong-Lien Wang, Yi-Ping Yang, Shih-Jen Chen, Chi-Hsien Peng, Shih-Hwa Chiou, Tai-Chi Lin
Best disease (BD), also termed Best vitelliform macular dystrophy (BVMD), is a juvenile-onset form of macular degeneration and central visual loss. In this report, we generated an induced pluripotent stem cell (iPSC) line, TVGH-iPSC-012-04, from the peripheral blood mononuclear cells of a female patient with BD by using the Sendai virus delivery system. The resulting iPSCs retained the disease-causing DNA mutation, expressed pluripotent markers and could differentiate into three germ layers. We believe that BD patient-specific iPSCs provide a powerful in vitro model for evaluating the pathological phenotypes of the disease...
April 3, 2018: Stem Cell Research
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