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https://www.readbyqxmd.com/read/28634244/simple-expression-domains-are-regulated-by-discrete-crms-during-drosophila-oogenesis
#1
Nicole T Revaitis, Robert A Marmion, Maira Farhat, Vesile Ekiz, Wei Wang, Nir Yakoby
Eggshell patterning has been extensively studied in Drosophila melanogaster However, the cis-regulatory modules (CRMs), which control spatiotemporal expression of these patterns, are vastly unexplored. The FlyLight collection contains over 7,000 intergenic and intronic DNA fragments that, if containing CRMs, can drive the transcription factor GAL4. We cross-listed the 84 genes known to be expressed during D. melanogaster oogenesis with the ~1200 listed genes of the FlyLight collection, and found 22 common genes that are represented by 281 FlyLight fly lines...
June 20, 2017: G3: Genes—Genomes—Genetics
https://www.readbyqxmd.com/read/28623270/behavioural-and-physiological-responses-to-prey-related-cues-reflect-higher-competitiveness-of-invasive-vs-native-ladybirds
#2
Gabriele Rondoni, Fulvio Ielo, Carlo Ricci, Eric Conti
Understanding the traits that might be linked with biological invasions represents a great challenge for preventing non-target effects on local biodiversity. In predatory insects, the ability to exploit habitats for oviposition and the physiological response to prey availability differs between species. Those species that respond more readily to environmental changes may confer to their offspring a competitive advantage over other species. Here, we tested the hypothesis that the invasive Harmonia axyridis (Coleoptera: Coccinellidae) makes better use of information from a plant-prey (Vicia faba - Aphis fabae) system compared to the native Oenopia conglobata...
June 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28622991/transcription-of-ribogenesis-genes-in-fish-gonads-applications-in-the-identification-of-stages-of-oogenesis-and-in-environmental-monitoring-of-intersex-condition
#3
Iratxe Rojo-Bartolomé, Ainara Valencia, Ibon Cancio
One of the best described effects of environmental xenoestrogens in fish is the generation of intersex gonads in males. Considering 5S rRNA a marker of the presence of oocytes, a 5S/18S rRNA index was calculated in 296 thicklip grey mullets (Chelon labrosus) from polluted environments. In addition, qPCR analysis of transcription factors gtf3a and ubtf1, related respectively to 5S and 18S rRNA synthesis, was conducted along female-oogenesis. 5S/18S rRNA index identified sex with a threshold value of 0.4521 separating males from females...
June 13, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28621416/all-in-one-integrating-cell-polarity-meiosis-mitosis-and-mechanical-forces-in-early-oocyte-differentiation-in-vertebrates
#4
Yaniv M Elkouby
While the differentiation of oocytes is key for embryonic development, and its investigation is crucial for advancing our understanding of human reproduction and fertility, many fundamental questions in oogenesis have been long standing. However, recent technical advances have led to several breakthroughs mainly in mice and zebrafish. Here I review these recent findings, including regulation and organization of the germline cyst, the mechanistics of chromosomal pairing, establishment of cell polarity, and formation of a universal mRNA-protein (mRNP) granule called the Balbiani body...
2017: International Journal of Developmental Biology
https://www.readbyqxmd.com/read/28619824/the-histone-3-lysine-4-methyltransferase-setd1b-is-a-maternal-effect-gene-required-for-the-oogenic-gene-expression-program
#5
David Brici, Qinyu Zhang, Susanne Reinhardt, Andreas Dahl, Hella Hartmann, Kerstin Schmidt, Neha Goveas, Jiahao Huang, Lenka Gahurova, Gavin Kelsey, Konstantinos Anastassiadis, A Francis Stewart, Andrea Kranz
Germ cell development involves major reprogramming of the epigenome to prime the zygote for totipotency. Histone 3 lysine 4 (H3K4) methylations are universal epigenetic marks mediated in mammals by six H3K4 methyltransferases related to fly Trithorax, including two yeast Set1 orthologs: Setd1a and Setd1b. Whereas Setd1a plays no role in oogenesis, we report that Setd1b deficiency causes female sterility. Oocyte specific Gdf9iCre conditional knockout (Setd1b(Gdf9) cKO) ovaries develop through all stages however follicular loss accumulated with age and unfertilized metaphase II (MII) oocytes exhibited irregularities of the zona pellucida and meiotic spindle...
June 15, 2017: Development
https://www.readbyqxmd.com/read/28604658/in-vitro-differentiation-of-human-embryonic-stem-cells-into-ovarian-follicle-like-cells
#6
Dajung Jung, Jie Xiong, Min Ye, Xunsi Qin, Lin Li, Shunfeng Cheng, Mengyuan Luo, Jia Peng, Ji Dong, Fuchou Tang, Wei Shen, Martin M Matzuk, Kehkooi Kee
Understanding the unique mechanisms of human oogenesis necessitates the development of an in vitro system of stem cell differentiation into oocytes. Specialized cell types and organoids have been derived from human pluripotent stem cells in vitro, but generating a human ovarian follicle remains a challenge. Here we report that human embryonic stem cells can be induced to differentiate into ovarian follicle-like cells (FLCs) in vitro. First, we find that two RNA-binding proteins specifically expressed in germ cells, DAZL and BOULE, regulate the exit from pluripotency and entry into meiosis...
June 12, 2017: Nature Communications
https://www.readbyqxmd.com/read/28588035/control-of-a-novel-spermatocyte-promoting-factor-by-the-male-germline-sex-determination-factor-phf7-of-drosophila-melanogaster
#7
Shu Yuan Yang, Yi-Chieh Chang, Yu Hsin Wan, Cale Whitworth, Ellen M Baxter, Shekerah Primus, Haiwei Pi, Mark Van Doren
A key aspect of germ cell development is to establish germline sexual identity and initiate a sex-specific developmental program to promote spermatogenesis or oogenesis. Previously, we have identified the histone reader Plant Homeodomain Finger 7 (PHF7) as an important regulator of male germline identity. To understand how PHF7 directs sexual differentiation of the male germline, we investigated the downstream targets of PHF7 by combining transcriptome analyses, which reveal genes regulated by Phf7, with genomic profiling of histone H3K4me2, the chromatin mark that is bound by PHF7...
June 6, 2017: Genetics
https://www.readbyqxmd.com/read/28583206/iron-availability-affects-west-nile-virus-infection-in-its-mosquito-vector
#8
Jean-Bernard Duchemin, Prasad N Paradkar
BACKGROUND: Mosquitoes are responsible for transmission of viruses, including dengue, West Nile and chikungunya viruses. Female mosquitoes are infected when they blood-feed on vertebrates, a required step for oogenesis. During this process, mosquitoes encounter high iron loads. Since iron is an essential nutrient for most organisms, including pathogens, one of the defense mechanisms for the host includes sequestration of iron away from the invading pathogen. Here, we determine whether iron availability affects viral replication in mosquitoes...
June 5, 2017: Virology Journal
https://www.readbyqxmd.com/read/28579534/molecular-markers-of-oocyte-differentiation-in-european-eel-during-hormonally-induced-oogenesis
#9
Iratxe Rojo-Bartolomé, Leticia Martínez-Miguel, Anne-Gaëlle Lafont, M Carmen Vílchez, Juan F Asturiano, Luz Pérez, Ibon Cancio
Reproduction in captivity is a key study issue in Anguilla anguilla as a possible solution for its dwindling population. Understanding the mechanisms controlling the production of ribosomal building blocks during artificially induced oocyte maturation could be particularly interesting. Transcription levels of ribosomal biogenesis associated genes could be used as markers to monitor oogenesis. Eels from the Albufera Lagoon were injected with carp pituitary extract for 15weeks and ovaries in previtellogenic (PV) stage (non-injected), in early-, mid-, late-vitellogenesis (EV, MV, LV), as well as in migratory nucleus stage (MN) were analysed...
June 1, 2017: Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
https://www.readbyqxmd.com/read/28576864/lin-41-and-oma-ribonucleoprotein-complexes-mediate-a-translational-repression-to-activation-switch-controlling-oocyte-meiotic-maturation-and-the-oocyte-to-embryo-transition-in-caenorhabditis-elegans
#10
Tatsuya Tsukamoto, Micah D Gearhart, Caroline A Spike, Gabriela Huelgas-Morales, Makaela Mews, Peter R Boag, Traude H Beilharz, David Greenstein
An extended meiotic prophase is a hallmark of oogenesis. Hormonal signaling activates the CDK1/cyclin B kinase to promote oocyte meiotic maturation, which involves nuclear and cytoplasmic events. Nuclear maturation encompasses nuclear envelope breakdown, meiotic spindle assembly, and chromosome segregation. Cytoplasmic maturation involves major changes in oocyte protein translation and cytoplasmic organelles and is poorly understood. In the nematode Caenorhabditis elegans, sperm release the major sperm protein (MSP) hormone to promote oocyte growth and meiotic maturation...
June 1, 2017: Genetics
https://www.readbyqxmd.com/read/28576772/incompatibility-between-mitochondrial-and-nuclear-genomes-during-oogenesis-results-in-ovarian-failure-and-embryonic-lethality
#11
Chunyang Zhang, Kristi L Montooth, Brian R Calvi
Mitochondrial dysfunction can cause female infertility. An important remaining question is the extent to which incompatibility between mitochondrial and nuclear genomes contributes to female infertility. It was previously shown that a mitochondrial haplotype from D. simulans (simw(501) ) is incompatible with a nuclear genome from the D. melanogaster strain Oregon-R (OreR), resulting in impaired development, which was enhanced at higher temperature. This mito-nuclear incompatibility is between alleles of the nuclear-encoded mitochondrial tyrosyl- tRNA synthetase (Aatm) and the mitochondrial-encoded tyrosyl-tRNA that it aminoacylates...
June 2, 2017: Development
https://www.readbyqxmd.com/read/28576120/expression-of-genes-associated-with-bmp-signaling-pathway-in-porcine-oocytes-before-and-after-ivm-a-microarray-approach
#12
Joanna Budna, Marta Rybska, Sylwia Ciesiółka, Artur Bryja, Sylwia Borys, Wiesława Kranc, Katarzyna Wojtanowicz-Markiewicz, Michal Jeseta, Ewa Sumelka, Dorota Bukowska, Paweł Antosik, Klaus P Brüssow, Małgorzata Bruska, Michał Nowicki, Maciej Zabel, Bartosz Kempisty
BACKGROUND: The full maturational capability of mammalian oocytes is accompanied by nuclear and cytoplasmic modifications, which are associated with proliferation and differentiation of surrounding cumulus cells. These events are regulated on molecular level by the expression of target genes involved in signal transduction pathways crucial for folliculogenesis and oogenesis. Transforming growth factor beta signaling includes several molecules that are involved in the regulation of oogenesis and embryo growth, including bone morphogenetic protein (BMP)...
June 2, 2017: Reproductive Biology and Endocrinology: RB&E
https://www.readbyqxmd.com/read/28574720/-bone-development-is-an-ontology-group-upregulated-in-porcine-oocytes-before-in-vitro-maturation-a-microarray-approach
#13
Joanna Budna, Artur Bryja, Piotr Celichowski, Wiesława Kranc, Sylwia Ciesiółka, Sylwia Borys, Marta Rybska, Agata Kolecka-Bednarczyk, Michal Jeseta, Dorota Bukowska, Paweł Antosik, Klaus P Brüssow, Małgorzata Bruska, Michał Nowicki, Maciej Zabel, Bartosz Kempisty
Mammalian cumulus-oocyte complexes (COCs) reach full developmental capability during folliculogenesis and oogenesis. It is well recognized that only gametes achieving MII stage after in vivo or in vitro maturation (IVM) are successfully fertilized by a single spermatozoon. Although the process of oocyte nuclear and/or cytoplasmic maturation in pigs is well determined, there exist many differences that promote these processes in vivo and in vitro. Therefore, this study aimed to investigate the differences in RNA expression profiles between porcine oocytes before and after IVM using microarray and real-time quantitative polymerase chain reaction (RT-qPCR) assays...
June 2, 2017: DNA and Cell Biology
https://www.readbyqxmd.com/read/28562440/vitamin-d-in-human-reproduction
#14
Jason M Franasiak, Evelin E Lara, Antonio Pellicer
PURPOSE OF REVIEW: Vitamin D deficiency has been associated with a wide range of human disease states and the global epidemic, particularly in reproductive aged women, has led to a focus on this complex hormones role in human reproduction. Indeed vitamin D receptors are found throughout the reproductive tract in the ovary, endometrium, and the placenta. It has roles both in calcium-dependent and independent pathways. However, agreement upon the most appropriate way to assess vitamin D status and ultimately its activity at various sites has proven challenging...
May 29, 2017: Current Opinion in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28552778/the-impact-of-zearalenone-on-the-meiotic-progression-and-primordial-follicle-assembly-during-early-oogenesis
#15
Ke-Han Liu, Xiao-Feng Sun, Yan-Zhong Feng, Shun-Feng Cheng, Bo Li, Ya-Peng Li, Wei Shen, Lan Li
Zearalenone (ZEA) is a mycotoxin produced by fusarium graminearum. It can cause abnormal reproductive function by acting as an environmental estrogen. Research has traditionally focused on acute and chronic injury on mammalian reproductive capacity after ZEA treatment. Little research has been done studying the effects of ZEA exposure on early oogenesis. In this study, we investigate the effects of ZEA exposure on meiotic entry, DNA double-strand breaks (DSBs), and primordial follicle assembly during murine early oogenesis...
May 26, 2017: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/28550411/isolation-characterization-and-expression-of-proto-oncogene-cmyc-in-large-yellow-croaker-larimichthys-crocea
#16
Yonghua Jiang, Kunhuang Han, Shihai Chen, Yilei Wang, Ziping Zhang
cMyc is a vital transcription factor that involves in the regulation of cell proliferation, growth, differentiation, and apoptosis. In the present study, cMyc in Larimichthys crocea (Lc-cMyc) was cloned and analyzed for investigating its function. The full-length cDNA of Lc-cMyc was 2089 bp encoding a 440-amino-acid protein (Lc-cMyc). Lc-cMyc had the characteristic helix-loop-helix-leucine-zipper (HLH-LZ) DNA-binding domain and highly conservative in evolution. The expression of Lc-cMyc was detected by quantitative real-time PCR (qRT-PCR) and in situ hybridization, respectively...
May 27, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/28550373/black-carp-vasa-identifies-embryonic-and-gonadal-germ-cells
#17
Ting Xue, Miao Yu, Qihua Pan, Yizhou Wang, Jian Fang, Lingyu Li, Yu Deng, Kai Chen, Qian Wang, Tiansheng Chen
Identification of molecular markers is an essential step in the study of germ cells. Vasa is an RNA helicase and a well-known germ cell marker that plays a crucial role in germ cell development. Here, we identified the Vasa homolog termed Mpvasa as the first germ cell marker in black carp (Mylopharyngodon piceus). First, a 2819-bp full-length Mpvasa complementary DNA (cDNA) was cloned by PCR using degenerated primers of conserved sequences and gene-specific primers. The Mpvasa cDNA sequence encodes a 637-amino acid protein that contains eight conserved characteristic motifs of the DEAD box protein family, and shares high identity to grass carp (81%) and zebrafish (74%) vasa homologs...
May 26, 2017: Development Genes and Evolution
https://www.readbyqxmd.com/read/28548451/molecular-and-functional-characterization-of-the-american-cockroach-periplaneta-americana-rab5-the-first-exopterygotan-low-molecular-weight-ovarian-gtpase-during-oogenesis
#18
Mohamed Elmogy, Amr A Mohamed, Muhammad Tufail, Tomohide Uno, Makio Takeda
The small Rab GTPases are key regulators of membrane vesicle trafficking. Ovaries of Periplaneta americana (Linnaeus) (Blattodea: Blattidae) have small molecular weight GTP/ATP-binding proteins during early and late vitellogenic periods of oogenesis. However, the identification and characterization of the detected proteins have not been yet reported. Herein, we cloned a cDNA encoding Rab5 from the American cockroach, P. americana, ovaries (PamRab5). It comprises 796 bp, encoding a protein of 213 amino acid residues with a predicted molecular weight of 23...
May 26, 2017: Insect Science
https://www.readbyqxmd.com/read/28533904/-this-is-where-it-all-started-the-pivotal-role-of-plc%C3%AE-within-the-sophisticated-process-of-mammalian-reproduction-a-systemic-review
#19
Itai Gat, Raoul Orvieto
Mammalian reproduction is one of the most complex and fascinating biological phenomenon, which aims to transfer maternal and paternal genetic material to the next generation. At the end of oogenesis and spermatogenesis, both haploid gametes contain a single set of chromosomes ready to form the zygote, the first cell of the newly developing individual. The mature oocyte and spermatozoa remain in a quiescent state, during which the oocyte is characterized by nuclear and cytoplasmic arrest, while the spermatozoa necessitates further maturation within the epididymis and female reproductive track prior to egg fertilization...
2017: Basic and Clinical Andrology
https://www.readbyqxmd.com/read/28533810/tc003132-is-essential-for-the-follicle-stem-cell-lineage-in-telotrophic-tribolium-oogenesis
#20
Matthias Teuscher, Nadi Ströhlein, Markus Birkenbach, Dorothea Schultheis, Michael Schoppmeier
BACKGROUND: Stem cells are undifferentiated cells with a potential for self-renewal, which are essential to support normal development and homeostasis. To gain insight into the molecular mechanisms underlying adult stem cell biology and organ evolution, we use the telotrophic ovary of the beetle Tribolium. To this end, we participated in a large-scale RNAi screen in the red flour beetle Tribolium, which identified functions in embryonic and postembryonic development for more than half of the Tribolium genes...
2017: Frontiers in Zoology
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