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https://www.readbyqxmd.com/read/28723674/nanoparticles-and-female-reproductive-system-how-do-nanoparticles-affect-oogenesis-and-embryonic-development
#1
REVIEW
Cong-Cong Hou, Jun-Quan Zhu
Along with the increasing application of nanoparticles (NPs) in many walks of life, environmental exposure to NPs has raised considerable health concerns. When NPs enter a pregnant woman's body through inhalation, venous injection, ingestion or skin permeation, maternal toxic stress reactions such as reactive oxygen species (ROS), inflammation, apoptosis and endocrine dyscrasia are induced in different organs, particularly in the reproductive organs. Recent studies have shown that NPs disturb the developing oocyte by invading the protective barrier of theca cells, granulosa cell layers and zona pellucida...
July 7, 2017: Oncotarget
https://www.readbyqxmd.com/read/28711427/temporal-remodeling-of-the-cell-cycle-accompanies-differentiation-in-the-drosophila-germline
#2
Taylor D Hinnant, Arturo A Alvarez, Elizabeth T Ables
Development of multicellular organisms relies upon the coordinated regulation of cellular differentiation and proliferation. Growing evidence suggests that some molecular regulatory pathways associated with the cell cycle machinery also dictate cell fate; however, it remains largely unclear how the cell cycle is remodeled in concert with cell differentiation. During Drosophila oogenesis, mature oocytes are created through a series of precisely controlled division and differentiation steps, originating from a single tissue-specific stem cell...
July 12, 2017: Developmental Biology
https://www.readbyqxmd.com/read/28696245/the-histone-codes-for-meiosis
#3
REVIEW
Lina Wang, Zhiliang Xu, Muhammad Babar Khawar, Chao Liu, Wei Li
Meiosis is a specialized process that produces haploid gametes from diploid cells by a single round of DNA replication followed by two successive cell divisions. It contains many special events, such as programmed DNA double-strand break (DSB) formation, homologous recombination, crossover formation and resolution. These events are associated with dynamically regulated chromosomal structures, the dynamic transcriptional regulation and chromatin remodeling are mainly modulated by histone modifications, termed 'histone codes'...
September 2017: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/28693619/successful-pregnancy-after-mucinous-cystic-neoplasm-with-invasive-carcinoma-of-the-pancreas-in-a-patient-with-polycystic-ovarian-syndrome-a-case-report
#4
Conisha Holloman, S J Carlan, Lohini Sundharkrishnan, Angela Guzman, Mario Madruga
BACKGROUND: The incidence of invasive cancer within a mucinous cystic neoplasm of the pancreas varies between 6 and 36%. Polycystic ovarian syndrome is a disorder characterized by hyperandrogenism and anovulatory infertility. One surgical treatment that can restore endocrine balance and ovulation in polycystic ovarian syndrome is partial ovarian destruction. Successful pregnancies following preconception pancreaticoduodenectomies (Whipple procedures) and chemoradiation to treat pancreatic neoplasms have been reported rarely but none were diagnosed with pre-cancer polycystic ovarian syndrome-associated infertility...
July 11, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28687414/ovarian-expression-and-localization-of-clathrin-cltc-components-in-cutthroat-trout-oncorhynchus-clarki-evidence-for-cltc-involvement-in-endocytosis-of-vitellogenin-during-oocyte-growth
#5
Hiroko Mizuta, Yuji Mushirobira, Jun Nagata, Takashi Todo, Akihiko Hara, Benjamin J Reading, Craig V Sullivan, Naoshi Hiramatsu
To evaluate potential involvement of clathrin in endocytosis of vitellogenin (Vtg) by teleost oocytes, cDNAs encoding clathrin heavy chain (cltc) were cloned from ovaries of cutthroat trout. Quantitative PCR revealed three types of cltc (cltc-a1, cltc-a2, cltc-b) to be expressed in 10 different tissues including the ovary. The cltc-a1 alone exhibited a significant decrease in ovarian expression during vitellogenesis; this was correlated with a corresponding decrease in transcripts encoding the major Vtg receptor (Vtgr)...
July 4, 2017: Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
https://www.readbyqxmd.com/read/28683315/laminin-levels-regulate-tissue-migration-and-anterior-posterior-polarity-during-egg-morphogenesis-in-drosophila
#6
María C Díaz de la Loza, Alfonsa Díaz-Torres, Federico Zurita, Alicia E Rosales-Nieves, Emad Moeendarbary, Kristian Franze, María D Martín-Bermudo, Acaimo González-Reyes
Basement membranes (BMs) are specialized extracellular matrices required for tissue organization and organ formation. We study the role of laminin and its integrin receptor in the regulation of tissue migration during Drosophila oogenesis. Egg production in Drosophila involves the collective migration of follicle cells (FCs) over the BM to shape the mature egg. We show that laminin content in the BM increases with time, whereas integrin amounts in FCs do not vary significantly. Manipulation of integrin and laminin levels reveals that a dynamic balance of integrin-laminin amounts determines the onset and speed of FC migration...
July 5, 2017: Cell Reports
https://www.readbyqxmd.com/read/28681975/exposure-effects-of-levonorgestrel-on-oogenesis-in-the-fathead-minnow-pimephales-promelas
#7
Tyler Frankel, Lance Yonkos, Jack Frankel
The synthetic progestin levonorgestrel (LNG) is commonly utilized as a component of human oral contraceptives. LNG enters the environment as a component of wastewater treatment plant effluent, and has been measured at low ng/L concentrations in surface waters. LNG has been shown to activate fish androgen receptors, causing the physical masculinization of females, changes in reproductive behavior, and decreases in fecundity. In this present study, the effects of LNG exposure on early stage oogenesis in the fathead minnow (Pimephales promelas) was examined...
July 6, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28674810/in-vivo-rnai-in-the-drosophila-follicular-epithelium-analysis-of-stem-cell-maintenance-proliferation-and-differentiation
#8
Veit Riechmann
In vivo RNAi in Drosophila facilitates simple and rapid analysis of gene functions in a cell- or tissue-specific manner. The versatility of the UAS-GAL4 system allows to control exactly where and when during development the function of a gene is depleted. The epithelium of the ovary is a particularly good model to study in a living animal how stem cells are maintained and how their descendants proliferate and differentiate. Here I provide basic information about the publicly available reagents for in vivo RNAi, and I describe how the oogenesis system can be applied to analyze stem cells and epithelial development at a histological level...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28669375/morphogenesis-related-gene-expression-profile-in-porcine-oocytes-before-and-after-in-vitro-maturation
#9
Joanna Budna, Adrian Chachuła, Dominika Kaźmierczak, Marta Rybska, Sylwia Ciesiółka, Artur Bryja, Wiesława Kranc, Sylwia Borys, Agnieszka Żok, Dorota Bukowska, Paweł Antosik, Małgorzata Bruska, Klaus P Brüssow, Michał Nowicki, Maciej Zabel, Bartosz Kempisty
Mammalian oocyte maturation is achieved when oocytes reach metaphase II (MII) stage, and accumulate mRNA and proteins in the cytoplasm following fertilization. It has been shown that oocytes investigated before and after in vitro maturation (IVM) differ significantly in transcriptomic and proteomic profiles. Additionally, folliculogenesis and oogenesis is accompanied by morphogenetic changes, which significantly influence further zygote formation and embryo growth. This study aimed to determine new transcriptomic markers of porcine oocyte morphogenesis that are associated with cell maturation competence...
July 3, 2017: Zygote: the Biology of Gametes and Early Embryos
https://www.readbyqxmd.com/read/28666956/coordination-of-cellular-differentiation-polarity-mitosis-and-meiosis-new-findings-from-early-vertebrate-oogenesis
#10
REVIEW
Yaniv M Elkouby, Mary C Mullins
A mechanistic dissection of early oocyte differentiation in vertebrates is key to advancing our knowledge of germline development, reproductive biology, the regulation of meiosis, and all of their associated disorders. Recent advances in the field include breakthroughs in the identification of germline stem cells in Medaka, in the cellular architecture of the germline cyst in mice, in a mechanistic dissection of chromosomal pairing and bouquet formation in meiosis in mice, in tracing oocyte symmetry breaking to the chromosomal bouquet of meiosis in zebrafish, and in the biology of the Balbiani body, a universal oocyte granule...
June 28, 2017: Developmental Biology
https://www.readbyqxmd.com/read/28665994/a-novel-role-of-kr%C3%A3-ppel-like-factor-4-in-zhikong-scallop-chlamys-farreri-during-spermatogenesis
#11
Dandan Yang, Zhifeng Zhang, Shaoshuai Liang, Qiankun Yang, Yingrui Wang, Zhenkui Qin
Krüppel-like factor 4 (KLF4) is a kind of zinc finger transcription factor, which is involved in terminal differentiation of epithelial cells and reprogramming of somatic cells to induced pluripotent stem (iPS) cells in mammals. In the present study, we identified a full-length cDNA of Klf4 in Zhikong scallop Chamys farreri (Cf-Klf4) and found that Cf-Klf4 presented a sexual dimorphic expression characteristic in C. farreri gonads. Cf-Klf4 expression was significantly higher in testes than in ovaries from growing stage to mature stage detected by quantitative real-time PCR, and was located in male gametes, except for spermatozoa during spermatogenesis through in situ hybridization and immunohistochemistry, while no positive signal was visible in female gametes during oogenesis...
2017: PloS One
https://www.readbyqxmd.com/read/28665301/comparative-proteomic-profiling-reveals-molecular-characteristics-associated-with-oogenesis-and-oocyte-maturation-during-ovarian-development-of-bactrocera-dorsalis-hendel
#12
Dong Wei, Ran Li, Meng-Yi Zhang, Yu-Wei Liu, Zheng Zhang, Guy Smagghe, Jin-Jun Wang
Time-dependent expression of proteins in ovary is important to understand oogenesis in insects. Here, we profiled the proteomes of developing ovaries from Bactrocera dorsalis (Hendel) to obtain information about ovarian development with particular emphasis on differentially expressed proteins (DEPs) involved in oogenesis. A total of 4838 proteins were identified with an average peptide number of 8.15 and sequence coverage of 20.79%. Quantitative proteomic analysis showed that a total of 612 and 196 proteins were differentially expressed in developing and mature ovaries, respectively...
June 30, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28655666/wolbachia-infection-in-aedes-aegypti-mosquitoes-alters-blood-meal-excretion-and-delays-oviposition-without-affecting-trypsin-activity
#13
Sofia Pimenta de Oliveira, Caroline Dantas de Oliveira, Mauricio Roberto Viana Sant'Anna, Heverton Leandro Carneiro Dutra, Eric Pearce Caragata, Luciano Andrade Moreira
Blood feeding in Aedes aegypti is essential for reproduction, but also permits the mosquito to act as a vector for key human pathogens such as the Zika and dengue viruses. Wolbachia pipientis is an endosymbiotic bacterium that can manipulate the biology of Aedes aegypti mosquitoes, making them less competent hosts for many pathogens. Yet while Wolbachia affects other aspects of host physiology, it is unclear whether it influences physiological processes associated with blood meal digestion. To that end, we examined the effects of wMel Wolbachia infection in Ae...
June 24, 2017: Insect Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/28646452/dosage-effects-of-zp2-and-zp3-heterozygous-mutations-cause-human-infertility
#14
Wenqiang Liu, Kunming Li, Dandan Bai, Jiqing Yin, Yuanyuan Tang, Fengli Chi, Linfeng Zhang, Yu Wang, Jiaping Pan, Shanshan Liang, Yi Guo, Jingling Ruan, Xiaochen Kou, Yanhong Zhao, Hong Wang, Jiayu Chen, Xiaoming Teng, Shaorong Gao
The zona pellucida (ZP) is an extracellular matrix universally surrounding mammalian eggs, which is essential for oogenesis, fertilization, and pre-implantation embryo development. Here, we identified two novel heritable mutations of ZP2 and ZP3, both occurring in an infertile female patient with ZP-abnormal eggs. Mouse models with the same mutations were generated by CRISPR/Cas9 gene editing system, and oocytes obtained from female mice with either single heterozygous mutation showed approximately half of the normal ZP thickness compared to wild-type oocytes...
August 2017: Human Genetics
https://www.readbyqxmd.com/read/28646175/ribosome-rna-profiling-to-quantify-ovarian-development-and-identify-sex-in-fish
#15
Zhi-Gang Shen, Hong Yao, Liang Guo, Xiao-Xia Li, Han-Ping Wang
Terminologies of ovary development, by somewhat subjective describing and naming main changes of oocytes, have been criticized for confusing and inconsistency of terms and classifications, and the incurred consequences impede communication among researchers. In the present work, we developed regression between ovary development and three ribosome RNA (rRNA) indexes, namely 5S rRNA percent, 18S rRNA percent, and 5S-18S rRNA ratio, using close relationship between volume percent of primary growth stage oocytes or gonadosomatic index and rRNA content, demonstrating species-specific quantification of ovary development can be established in species with either synchronous and asynchronous oogenesis...
June 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28646146/optical-coherence-microscopy-as-a-novel-non-invasive-method-for-the-4d-live-imaging-of-early-mammalian-embryos
#16
Karol Karnowski, Anna Ajduk, Bartosz Wieloch, Szymon Tamborski, Krzysztof Krawiec, Maciej Wojtkowski, Maciej Szkulmowski
Imaging of living cells based on traditional fluorescence and confocal laser scanning microscopy has delivered an enormous amount of information critical for understanding biological processes in single cells. However, the requirement for a high numerical aperture and fluorescent markers still limits researchers' ability to visualize the cellular architecture without causing short- and long-term photodamage. Optical coherence microscopy (OCM) is a promising alternative that circumvents the technical limitations of fluorescence imaging techniques and provides unique access to fundamental aspects of early embryonic development, without the requirement for sample pre-processing or labeling...
June 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28645154/alg-5-is-a-mirna-associated-argonaute-required-for-proper-developmental-timing-in-the-caenorhabditis-elegans-germline
#17
Kristen C Brown, Joshua M Svendsen, Rachel M Tucci, Brooke E Montgomery, Taiowa A Montgomery
Caenorhabditis elegans contains 25 Argonautes, of which, ALG-1 and ALG-2 are known to primarily interact with miRNAs. ALG-5 belongs to the AGO subfamily of Argonautes that includes ALG-1 and ALG-2, but its role in small RNA pathways is unknown. We analyzed by high-throughput sequencing the small RNAs associated with ALG-5, ALG-1 and ALG-2, as well as changes in mRNA expression in alg-5, alg-1 and alg-2 mutants. We show that ALG-5 defines a distinct branch of the miRNA pathway affecting the expression of genes involved in immunity, defense, and development...
June 22, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28634244/simple-expression-domains-are-regulated-by-discrete-crms-during-drosophila-oogenesis
#18
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
#19
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
#20
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
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