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Primordial germ cell

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https://www.readbyqxmd.com/read/28224044/mastl-is-essential-for-anaphase-entry-of-proliferating-primordial-germ-cells-and-establishment-of-female-germ-cells-in-mice
#1
Sanjiv Risal, Jingjing Zhang, Deepak Adhikari, Xiaoman Liu, Jingchen Shao, Mengwen Hu, Kiran Busayavalasa, Zhaowei Tu, Zijiang Chen, Philipp Kaldis, Kui Liu
In mammals, primordial germ cells (PGCs) are the embryonic cell population that serve as germ cell precursors in both females and males. During mouse embryonic development, the majority of PGCs are arrested at the G2 phase when they migrate into the hindgut at 7.75-8.75 dpc (days post coitum). It is after 9.5 dpc that the PGCs undergo proliferation with a doubling time of 12.6 h. The molecular mechanisms underlying PGC proliferation are however not well studied. In this work. Here we studied how MASTL (microtubule-associated serine/threonine kinase-like)/Greatwall kinase regulates the rapid proliferation of PGCs...
2017: Cell Discovery
https://www.readbyqxmd.com/read/28219352/retinoic-acid-promotes-expression-of-germline-specific-genes-in-chicken-blastoderm-cells-by-stimulating-smad1-5-phosphorylation-in-a-feeder-free-culture-system
#2
Xiaochuan Tang, Shiyong Xu, Hongpeng Zhang, Qing Chen, Rongyang Li, Wangjun Wu, Minli Yu, Honglin Liu
BACKGROUND: Producing transgenic chickens with chicken blastodermal cells (cBCs) is inefficient due to the extremely low germline transmission capacity of cBCs. As chicken primordial germ cells (PGCs) have been reported as an efficient method for producing transgenic chickens, the inefficiency of cBCs could potentially be resolved by inducing them to differentiate into germ cells. However, whether chemical inducers are able to enhance cBCs germline competence in vitro is unknown and the molecular mechanisms of differentiation of chicken pluripotent cells into germ cells are poorly understood...
February 20, 2017: BMC Biotechnology
https://www.readbyqxmd.com/read/28218476/overexpression-of-tet-dioxygenases-in-seminomas-associates-with-low-levels-of-dna-methylation-and-hydroxymethylation
#3
Martina Benešová, Kateřina Trejbalová, Dana Kučerová, Zdenka Vernerová, Tomáš Hron, Arpád Szabó, Rachel Amouroux, Petr Klézl, Petra Hajkova, Jiří Hejnar
Germ cell tumors and particularly seminomas reflect the epigenomic features of their parental primordial germ cells, including genomic DNA hypomethylation and expression of pluripotent cell markers. Because the DNA hypomethylation might be a result of TET dioxygenase activity, we examined expression of TET1-3 enzymes and the level of their product, 5-hydroxymethylcytosine, in a panel of histologically characterized seminomas and non-seminomatous germ cell tumors. Expression of TET dioxygenase mRNAs was quantified by real-time PCR...
February 20, 2017: Molecular Carcinogenesis
https://www.readbyqxmd.com/read/28215675/basic-fibroblast-growth-factor-is-critical-to-reprogramming-buffalo-bubalus-bubalis-primordial-germ-cells-into-embryonic-germ-stem-cell-like-cells
#4
Caizhu Wang, Yanfei Deng, Feng Chen, Peng Zhu, Jingwei Wei, Chan Luo, Fenghua Lu, Sufang Yang, Deshun Shi
Primordial germ cells (PGCs) are destined to form gametes in vivo, and they can be reprogrammed into pluripotent embryonic germ (EG) cells in vitro. Buffalo PGC have been reported to be reprogrammed into EG-like cells, but the identities of the major signaling pathways and culture media involved in this derivation remain unclear. Here, the effects of basic fibroblast growth factor (bFGF) and downstream signaling pathways on the reprogramming of buffalo PGCs into EG-like cells were investigated. Results showed bFGF to be critical to buffalo PGCs to dedifferentiate into EG-like cells (20 ng/mL is optimal) with many characteristics of pluripotent stem cells, including alkaline phosphatase (AP) activity, expression of pluripotency marker genes such as OCT4, NANOG, SOX2, SSEA-1, CDH1, and TRA-1-81, and the capacity to differentiate into all three embryonic germ layers...
March 15, 2017: Theriogenology
https://www.readbyqxmd.com/read/28193725/the-tgf-%C3%AE-family-in-the-reproductive-tract
#5
Diana Monsivais, Martin M Matzuk, Stephanie A Pangas
The transforming growth factor β (TGF-β) family has a profound impact on the reproductive function of various organisms. In this review, we discuss how highly conserved members of the TGF-β family influence the reproductive function across several species. We briefly discuss how TGF-β-related proteins balance germ-cell proliferation and differentiation as well as dauer entry and exit in Caenorhabditis elegans. In Drosophila melanogaster, TGF-β-related proteins maintain germ stem-cell identity and eggshell patterning...
February 13, 2017: Cold Spring Harbor Perspectives in Biology
https://www.readbyqxmd.com/read/28182654/elli-1-a-novel-germline-protein-modulates-rnai-activity-and-p-granule-accumulation-in-caenorhabditis-elegans
#6
Karolina M Andralojc, Anne C Campbell, Ashley L Kelly, Markus Terrey, Paige C Tanner, Ian M Gans, Michael J Senter-Zapata, Eraj S Khokhar, Dustin L Updike
Germ cells contain non-membrane bound cytoplasmic organelles that help maintain germline integrity. In C. elegans they are called P granules; without them, the germline undergoes partial masculinization and aberrant differentiation. One key P-granule component is the Argonaute CSR-1, a small-RNA binding protein that antagonizes accumulation of sperm-specific transcripts in developing oocytes and fine-tunes expression of proteins critical to early embryogenesis. Loss of CSR-1 complex components results in a very specific, enlarged P-granule phenotype...
February 9, 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28182014/starvation-at-birth-impairs-germ-cell-cyst-breakdown-and-increases-autophagy-and-apoptosis-in-mouse-oocytes
#7
Yong-Yong Wang, Yuan-Chao Sun, Xiao-Feng Sun, Shun-Feng Cheng, Bo Li, Xi-Feng Zhang, Massimo De Felici, Wei Shen
The female reproductive lifespan is largely determined by the size of primordial follicle pool, which is established following germ cell cyst breakdown around birth. Almost two-third of oocytes are lost during germ cell cysts breakdown, following autophagic and apoptosis mechanisms. To investigate a possible relationship between germ cell cyst breakdown and nutrition supply, we established a starvation model in mouse pups at birth and evaluated the dynamics of cyst breakdown during nutrient deprivation. Our results showed that after 36 h of starvation between 1...
February 9, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28174243/efficient-talen-mediated-gene-targeting-of-chicken-primordial-germ-cells
#8
Lorna Taylor, Daniel F Carlson, Sunil Nandi, Adrian Sherman, Scott C Fahrenkrug, Michael J McGrew
In this work we use TALE nucleases (TALENs) to target a reporter construct to the DDX4 (vasa) locus in chicken primordial germ cells. Vasa is a key germ cell determinant in many animal species and is posited to control avian germ cell formation. We show that TALENs mediate homology directed repair of the DDX4 locus on the Z sex chromosome at high (8.1%) efficiencies. Large genetic deletions of 30kb encompassing the entire DDX4 locus were also created using a single TALEN pair. The targeted PGCs were germ line competent and were used to produce DDX4 null offspring...
February 7, 2017: Development
https://www.readbyqxmd.com/read/28165148/a-correlative-study-of-the-allantois-in-pig-and-rabbit-highlighting-the-diversity-of-extraembryonic-tissues-in-four-mammalian-species-including-mouse-and-man
#9
Waad Hassan, Christoph Viebahn
Despite its conserved role in placenta and umbilical cord formation, the mammalian allantois shows remarkable diversity in size and form as well as in the timing of its appearance and attachment to the chorion. In the mouse, the common allantoic diverticulum is lacking; instead, the allantoic core domain is defined as a progenitor center for allantoic development. In this study, the allantoises of the pig and the rabbit as two nonrodent mammals of increasing significance in biomedical research are compared (1) morphologically using high resolution light and electron microscopy and (2) molecularly using brachyury mRNA expression as a mesodermal marker...
February 6, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/28161521/germ-cell-regeneration-mediated-enhanced-mutagenesis-in-the-ascidian-ciona-intestinalis-reveals-flexible-germ-cell-formation-from-different-somatic-cells
#10
Keita Yoshida, Akiko Hozumi, Nicholas Treen, Tetsushi Sakuma, Takashi Yamamoto, Maki Shirae-Kurabayashi, Yasunori Sasakura
The ascidian Ciona intestinalis has a high regeneration capacity that enables the regeneration of artificially removed primordial germ cells (PGCs) from somatic cells. We utilized PGC regeneration to establish efficient methods of germ line mutagenesis with transcription activator-like effector nucleases (TALENs). When PGCs were artificially removed from animals in which a TALEN pair was expressed, somatic cells harboring mutations in the target gene were converted into germ cells, this germ cell population exhibited higher mutation rates than animals not subjected to PGC removal...
February 1, 2017: Developmental Biology
https://www.readbyqxmd.com/read/28158811/derivation-and-characterization-of-primordial-germ-cells-from-guangxi-yellow-feather-chickens
#11
L Wang, M J Chen, D Y Chen, S F Peng, X L Zhou, Y Y Liao, X G Yang, H Y Xu, S S Lu, M Zhang, K H Lu, Y Q Lu
No abstract text is available yet for this article.
October 27, 2016: Poultry Science
https://www.readbyqxmd.com/read/28157506/not-all-h3k4-methylations-are-created-equal-mll2-compass-dependency-in-primordial-germ-cell-specification
#12
Deqing Hu, Xin Gao, Kaixiang Cao, Marc A Morgan, Gloria Mas, Edwin R Smith, Andrew G Volk, Elizabeth T Bartom, John D Crispino, Luciano Di Croce, Ali Shilatifard
The spatiotemporal regulation of gene expression is central for cell-lineage specification during embryonic development and is achieved through the combinatorial action of transcription factors/co-factors and epigenetic states at cis-regulatory elements. Here, we show that in addition to implementing H3K4me3 at promoters of bivalent genes, Mll2 (KMT2B)/COMPASS can also implement H3K4me3 at a subset of non-TSS regulatory elements, a subset of which shares epigenetic signatures of active enhancers. Our mechanistic studies reveal that association of Mll2's CXXC domain with CpG-rich regions plays an instrumental role for chromatin targeting and subsequent implementation of H3K4me3...
February 2, 2017: Molecular Cell
https://www.readbyqxmd.com/read/28151980/lhx8-interacts-with-a-novel-germ-cell-specific-nuclear-factor-containing-an-nbl1-domain-in-rainbow-trout-oncorhynchus-mykiss
#13
Liyuan Fu, Prasanthi P Koganti, Jian Wang, Lei Wang, Cheng-Lun Wang, Jianbo Yao
Lhx8 is an important transcription factor that is preferentially expressed in germ cells. Lhx8 null mice are infertile due to lack of oocytes and impairment of the transition from primordial follicles to primary follicles. Lhx8 deficiency also affects the expression of many important oocyte-specific genes. In this study, we report the characterization of rainbow trout lhx8 genes and identification of a novel germ cell-specific nuclear factor that interacts with Lhx8. Two lhx8 genes, lhx8a and lhx8b, were identified, encoding proteins of 344 and 361 amino acids, respectively...
2017: PloS One
https://www.readbyqxmd.com/read/28144634/gonadogenesis-and-sex-differentiation-in-the-korean-rose-bitterling-rhodeus-uyekii
#14
In Bon Goo, Jung Eun Kim, Myung Hun Kim, Hye-Sung Choi, Hee Jeong Kong, Jeong Ho Lee, In-Seok Park
This report describes the sex differentiation of the Korean rose bitterling, Rhodeus uyekii, from hatching to 170 days post-hatch (DPH) in relation to total length (TL), body weight (BW), and integral water temperature (IWT). The growth curve of TL from just hatching to 83 DPH was 5.144e(0.045t) (R² = 0.961; t, time), and that of BW was 2.398e(0.086t) (R² = 0.725). Primordial germ cells (PGCs) were observed at 17 DPH (7.9 mm TL, 3.74 mg BW, 374°C IWT), and thereafter began to protrude into the peritoneal cavity...
December 2016: Balsaeng'gwa Saengsig
https://www.readbyqxmd.com/read/28139300/identification-of-a-novel-12-bp-insertion-deletion-indel-of-ips-related-oct4-gene-and-its-association-with-reproductive-traits-in-male-piglets
#15
Fa Ren, Shuai Yu, Rui Chen, Xiaoyan Lv, Chuanying Pan
As a key factor of cellular reprogramming, Oct4 is one of vital transcription factors for induced pluripotent stem cells (iPSCs). Loss of its function or deletion causes apoptosis in primordial germ cells (PGCs), which affect reproductive traits in mammals. In this study, a novel 12-bp insertion/deletion (indel) polymorphism (NC_010449:g.2759-2760insGGTTTTTGTCTA) within the Oct4 gene was identified in 442 pigs of Large White (LW) and Landrace (LD) breeds, showing three genotypes designated as II, ID, and DD...
January 23, 2017: Animal Reproduction Science
https://www.readbyqxmd.com/read/28135773/epidemiological-study-of-paediatric-germ-cell-tumours-revealed-the-incidence-and-distribution-that-was-expected-but-a-low-mortality-rate
#16
Madeline Evers, Catherine Rechnitzer, Niels Graem, Peder Skov Wehner, Henrik Schroeder, Steen Rosthoej, Christiane Hammershaimb Mosbech, Christina Engel Hoei-Hansen, Astrid Sehested, Taryn D Treger, Jesper Brok
AIM: Germ cell tumours (GCTs) are a rare heterogeneous tumour group derived from primordial germ cells, which can be benign or malignant and occur in the gonads or extragonadally. This study mapped the paediatric GCTs in Denmark from 1984-2013 to study the incidence and outcome. METHODS: We identified paediatric GCTs from the Danish Childhood Cancer and National Pathology Registries and reviewed the case records for patient characteristics, tumour characteristics and clinical outcome...
January 30, 2017: Acta Paediatrica
https://www.readbyqxmd.com/read/28122234/germ-cell-less-promotes-centrosome-segregation-to-induce-germ-cell-formation
#17
Dorothy A Lerit, Conrad W Shebelut, Kristen J Lawlor, Nasser M Rusan, Elizabeth R Gavis, Paul Schedl, Girish Deshpande
The primordial germ cells (PGCs) specified during embryogenesis serve as progenitors to the adult germline stem cells. In Drosophila, the proper specification and formation of PGCs require both centrosomes and germ plasm, which contains the germline determinants. Centrosomes are microtubule (MT)-organizing centers that ensure the faithful segregation of germ plasm into PGCs. To date, mechanisms that modulate centrosome behavior to engineer PGC development have remained elusive. Only one germ plasm component, Germ cell-less (Gcl), is known to play a role in PGC formation...
January 24, 2017: Cell Reports
https://www.readbyqxmd.com/read/28118592/embryonic-trogocytosis-neighborly-nibbling-during-development
#18
Justin S A Perry, Kodi S Ravichandran
New work in Caenorhabditis elegans shows that during embryogenesis endodermal cells interact with and regulate primordial germ cells by actively excising and digesting germ cell lobes. Endodermal cells utilize proteins linked to endocytosis to perform this unique 'cannibalistic' process.
January 23, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28115159/dnd-protein-functions-as-a-translation-repressor-during-zebrafish-embryogenesis
#19
Manami Kobayashi, Saori Tani-Matsuhana, Yasuka Ohkawa, Hiroshi Sakamoto, Kunio Inoue
Germline and somatic cell distinction is regulated through a combination of microRNA and germ cell-specific RNA-binding proteins in zebrafish. An RNA-binding protein, DND, has been reported to relieve the miR-430-mediated repression of some germ plasm mRNAs such as nanos3 and tdrd7 in primordial germ cells (PGCs). Here, we showed that miR-430-mediated repression is not counteracted by the overexpression of DND protein in somatic cells. Using a λN-box B tethering assay in the embryo, we found that tethering of DND to reporter mRNA results in translation repression without affecting mRNA stability...
January 20, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28101336/regulatory-elements-and-transcriptional-control-of-chicken-vasa-homologue-cvh-promoter-in-chicken-primordial-germ-cells
#20
So Dam Jin, Bo Ram Lee, Young Sun Hwang, Hong Jo Lee, Jong Seop Rim, Jae Yong Han
BACKGROUND: Primordial germ cells (PGCs), the precursors of functional gametes, have distinct characteristics and exhibit several unique molecular mechanisms to maintain pluripotency and germness in comparison to somatic cells. They express germ cell-specific RNA binding proteins (RBPs) by modulating tissue-specific cis- and trans-regulatory elements. Studies on gene structures of chicken vasa homologue (CVH), a chicken RNA binding protein, involved in temporal and spatial regulation are thus important not only for understanding the molecular mechanisms that regulate germ cell fate, but also for practical applications of primordial germ cells...
2017: Journal of Animal Science and Biotechnology
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