keyword
MENU ▼
Read by QxMD icon Read
search

Meiosis

keyword
https://www.readbyqxmd.com/read/29163367/a-testis-specific-long-non-coding-rna-lncrna-tcam1-regulates-immune-related-genes-in-mouse-male-germ-cells
#1
Misuzu Kurihara, Kai Otsuka, Shin Matsubara, Akira Shiraishi, Honoo Satake, Atsushi P Kimura
Spermatogenesis is precisely controlled by hormones from the hypothalamus-pituitary-gonadal axis and testis-specific genes, but the regulatory mechanism is not fully understood. Recently, a large number of long non-coding RNAs (lncRNAs) are found to be transcribed at each stage of meiosis of male germ cells, and their functions in spermatogenesis have yet to be fully investigated. lncRNA-testicular cell adhesion molecule 1 (lncRNA-Tcam1) is a nuclear lncRNA which is specifically expressed in mouse male germ cells and presumed to play a role in gene regulation during meiosis...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/29161344/nuclear-localization-of-eif4g3-suggests-a-role-for-the-xy-body-in-translational-regulation-during-spermatogenesis-in-mice
#2
Jianjun Hu, Fengyun Sun, Mary Ann Handel
Eukaryotic translation initiation factor 4G (EIF4G) is an important scaffold protein in the translation initiation complex. In mice mutation of the Eif4g3 gene causes male infertility, with arrest of meiosis at the end of meiotic prophase. This study documents features of the developmental expression and sub-cellular localization of EIF4G3 that might contribute to its highly specific role in meiosis and spermatogenesis. Quite unexpectedly, EIF4G3 is located in the nucleus of spermatocytes, where it is highly enriched in the XY body, the chromatin domain formed by the transcriptionally inactive sex chromosomes...
November 17, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/29158400/drosophila-protein-phosphatases-2a-b-wdb-and-wrd-regulate-meiotic-centromere-localization-and-function-of-the-mei-s332-shugoshin
#3
Belinda S Pinto, Terry L Orr-Weaver
Proper segregation of chromosomes in meiosis is essential to prevent miscarriages and birth defects. This requires that sister chromatids maintain cohesion at the centromere as cohesion is released on the chromatid arms when the homologs segregate at anaphase I. The Shugoshin proteins preserve centromere cohesion by protecting the cohesin complex from cleavage, and this has been shown in yeasts to be mediated by recruitment of the protein phosphatase 2A B' (PP2A B'). In metazoans, delineation of the role of PP2A B' in meiosis has been hindered by its myriad of other essential roles...
November 20, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29158290/a-comparative-proteome-profile-of-female-mouse-gonads-suggests-a-tight-link-between-the-electron-transport-chain-and-meiosis-initiation
#4
Cong Shen, Mingrui Li, Pan Zhang, Yueshuai Guo, Hao Zhang, Bo Zheng, Hui Teng, Tao Zhou, Xuejiang Guo, Ran Huo
Generation of haploid gametes by meiosis is a unique property of germ cells and is critical for sexual reproduction. Leaving mitosis and entering meiosis is a key step in germ cell development. Several inducers or intrinsic genes are known to be important for meiotic initiation, but the regulation of meiotic initiation, especially at the protein level, is still not well understood. We constructed a comparative proteome profile of female mouse fetal gonads at specific time points (11.5, 12.5, and 13.5 days post coitum), spanning a critical window for initiation of meiosis in female germ cells...
November 20, 2017: Molecular & Cellular Proteomics: MCP
https://www.readbyqxmd.com/read/29158261/the-biotin-ligating-protein-bpl-1-is-critical-for-lipid-biosynthesis-and-polarization-of-the-caenorhabditis-elegans-embryo
#5
Jason S Watts, Diane G Morton, Kenneth J Kemphues, Jennifer L Watts
Biotin is an essential cofactor for multiple metabolic reactions catalyzed by carboxylases. Biotin is covalently linked to apoproteins by holocarboxylase synthetase (HCS). Accordingly, some mutations in HCS cause holocarboxylase deficiency, a rare metabolic disorder that can be life threatening if left untreated. However, the long-term effects of HCS deficiency are poorly understood. Here, we report our investigations of bpl-1, which encodes the C. elegans ortholog of HCS. We found that mutations in the biotin-binding region of bpl-1 are maternal-effect lethal, and cause defects in embryonic polarity establishment, meiosis, and the integrity of the eggshell permeability barrier...
November 20, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29153393/protein-based-inheritance-epigenetics-beyond-the-chromosome
#6
REVIEW
Zachary H Harvey, Yiwen Chen, Daniel F Jarosz
Epigenetics refers to changes in phenotype that are not rooted in DNA sequence. This phenomenon has largely been studied in the context of chromatin modification. Yet many epigenetic traits are instead linked to self-perpetuating changes in the individual or collective activity of proteins. Most such proteins are prions (e.g., [PSI(+)], [URE3], [SWI(+)], [MOT3(+)], [MPH1(+)], [LSB(+)], and [GAR(+)]), which have the capacity to adopt at least one conformation that self-templates over long biological timescales...
November 15, 2017: Molecular Cell
https://www.readbyqxmd.com/read/29145066/relationship-between-follicular-dynamics-and-oocyte-maturation-during-in%C3%A2-vitro-culture-as-a-non-invasive-sign-of-caprine-oocyte-meiotic-competence
#7
J Cadenas, C Maside, A C A Ferreira, L A Vieira, J Leiva-Revilla, V M Paes, B G Alves, F Z Brandão, A P R Rodrigues, M B Wheeler, J R Figueiredo
The search for non-invasive signs of oocyte meiotic competence is very important for the development of in vitro follicle culture (IVFC) systems. The aims of the present study were: (1) to investigate the effect of in vitro maturation (IVM) of in vivo grown goat COCs, in group or individually, on oocyte chromatin configuration (Experiment 1), and (2) the influence of IVFC period (12 vs. 18 days) on the ability of the oocyte to resume meiosis immediately after IVFC (before in vitro maturation; IVM), or after IVM (Experiment 2)...
November 4, 2017: Theriogenology
https://www.readbyqxmd.com/read/29141921/microrna-574-suppresses-oocyte-maturation-via-targeting-hyaluronan-synthase-2-in-porcine-cumulus-cells
#8
Bo Pan, Derek Toms, Julang Li
MicroRNAs (miRNAs) have been established as important regulators of gene expression in the mammalian ovary. A previous screen of small RNA in the porcine ovary identified the down regulation of miR-574 during oocyte maturation, although its role during this process was not established. Here, we found that miR-574 directly targets the transcript for hyaluron synthase 2 protein (HAS2), a key enzyme in the production of extracellular matrix by the surrounding cumulus cells. Inhibiting this miRNA during in vitro maturation (IVM) increased HAS2 levels along with several markers of oocyte quality...
November 15, 2017: American Journal of Physiology. Cell Physiology
https://www.readbyqxmd.com/read/29141207/distinct-terb1-domains-regulate-different-protein-interactions-in-meiotic-telomere-movement
#9
Jingjing Zhang, Zhaowei Tu, Yoshinori Watanabe, Hiroki Shibuya
Meiotic telomeres attach to the nuclear envelope (NE) and drive the chromosome movement required for the pairing of homologous chromosomes. The meiosis-specific telomere proteins TERB1, TERB2, and MAJIN are required to regulate these events, but their assembly processes are largely unknown. Here, we developed a germ-cell-specific knockout mouse of the canonical telomere-binding protein TRF1 and revealed an essential role for TRF1 in directing the assembly of TERB1-TERB2-MAJIN. Further, we identified a TERB2 binding (T2B) domain in TERB1 that is dispensable for the TRF1-TERB1 interaction but is essential for the subsequent TERB1-TERB2 interaction and therefore for telomere attachment to the NE...
November 14, 2017: Cell Reports
https://www.readbyqxmd.com/read/29136644/developmentally-regulated-internal-transcription-initiation-during-meiosis-in-budding-yeast
#10
Sai Zhou, Rolf Sternglanz, Aaron M Neiman
Sporulation of budding yeast is a developmental process in which cells undergo meiosis to generate stress-resistant progeny. The dynamic nature of the budding yeast meiotic transcriptome has been well established by a number of genome-wide studies. Here we develop an analysis pipeline to systematically identify novel transcription start sites that reside internal to a gene. Application of this pipeline to data from a synchronized meiotic time course reveals over 40 genes that display specific internal initiations in mid-sporulation...
2017: PloS One
https://www.readbyqxmd.com/read/29134282/aba-and-iaa-control-microsporogenesis-in-petunia-hybrida-l
#11
L V Kovaleva, A S Voronkov, E V Zakharova, I M Andreev
The formation of fertile male gametophyte is known to require timely degeneration of polyfunctional tapetum tissue. The last process caused by the programmed cell death (PCD) is a part of the anther program maturation which leads to sequential anther tissue destruction coordinated with pollen differentiation. In the present work, distribution of abscisic acid (ABA) and indole-3-acetic acid (IAA) in developing anthers of male-fertile and male-sterile lines of petunia (Petunia hybrida L.) was analyzed by using the immunohistochemical method...
November 13, 2017: Protoplasma
https://www.readbyqxmd.com/read/29133801/chromosome-segregation-occurs-by-microtubule-pushing-in-oocytes
#12
Kimberley Laband, Rémi Le Borgne, Frances Edwards, Marine Stefanutti, Julie C Canman, Jean-Marc Verbavatz, Julien Dumont
During cell division, spindle microtubules ensure an equal repartition of chromosomes between the two daughter cells. While the kinetochore-dependent mechanisms that drive mitotic chromosome segregation are well understood, in oocytes of most species atypical spindles assembled in absence of centrosomes entail poorly understood mechanisms of chromosome segregation. In particular, the structure(s) responsible for force generation during meiotic chromosome separation in oocytes is unclear. Using quantitative light microscopy, electron tomography, laser-mediated ablation, and genetic perturbations in the Caenorhabditis elegans oocyte, we studied the mechanism of chromosome segregation in meiosis...
November 14, 2017: Nature Communications
https://www.readbyqxmd.com/read/29126291/the-dynamic-development-of-germ-cells-during-chicken-embryogenesis
#13
Seo Yeong Yang, Hong Jo Lee, Hyung Chul Lee, Young Sun Hwang, Young Hyun Park, Tamao Ono, Jae Yong Han
Appropriate regulation of cell proliferation during embryogenesis is crucial for the maintenance of germness. An in-depth understanding of germ cell developmental processes may yield valuable information on germ cell biology and applied sciences. However, direct evidences about germ cell proliferation and cell cycling during avian embryonic development has not been well-studied. Thus, we explored chicken germ cell dynamics during embryonic development via flow cytometry employing a germ cell-specific anti-cVASA antibody (the chicken VASA homolog is termed CVH) and propidium iodide staining...
November 4, 2017: Poultry Science
https://www.readbyqxmd.com/read/29126233/endothelin-1-promotes-human-germinal-vesicle-stage-oocyte-maturation-by-downregulating-connexin-26-expression-in-cumulus-cells
#14
Long Cui, Jiajie Shen, Li Fang, Xiaodan Mao, Hanzhi Wang, Yinghui Ye
STUDY QUESTION: Does endothelin-1 (ET-1) promote human oocyte maturation and by what mechanism? SUMMARY ANSWER: Addition of ET-1 to the medium in which human germinal vesicle (GV)-stage immature oocytes are cultured enhances the GV breakdown (GVBD) rate; the resumption of meiosis may be initiated by ET-1 downregulating the expression of connexin-26 (Cx26) in cumulus cells via endothelin receptor type B (ETRB), leading to decreased cAMP levels in the oocyte. WHAT IS KNOWN ALREADY: The paracrine factor ET-1 is secreted by ovarian somatic cells in pre-ovulatory follicles and regulates oocyte maturation in mice...
November 8, 2017: Molecular Human Reproduction
https://www.readbyqxmd.com/read/29126204/proteomic-analysis-of-germinal-vesicles-in-the-domestic-cat-model-reveals-candidate-nuclear-proteins-involved-in-oocyte-competence-acquisition
#15
P-C Lee, D E Wildt, P Comizzoli
STUDY QUESTION: Do nuclear proteins in the germinal vesicle (GV) contribute to oocyte competence acquisition during folliculogenesis? SUMMARY ANSWER: Proteomic analysis of GVs identified candidate proteins for oocyte competence acquisition, including a key RNA processing protein - heterogeneous nuclear ribonucleoprotein A2/B1 (hnRNPA2B1). WHAT IS KNOWN ALREADY: The domestic cat GV, which is physiologically similar to the human GV, gains the intrinsic ability to resume meiosis and support early embryo development during the pre-antral-to-antral follicle transition...
November 8, 2017: Molecular Human Reproduction
https://www.readbyqxmd.com/read/29126117/dynamic-reorganization-of-open-chromatin-underlies-diverse-transcriptomes-during-spermatogenesis
#16
So Maezawa, Masashi Yukawa, Kris G Alavattam, Artem Barski, Satoshi H Namekawa
During spermatogenesis, germ cells undergo massive cellular reconstruction and dynamic chromatin remodeling to facilitate highly diverse transcriptomes, which are required for the production of functional sperm. However, it remains unknown how germline chromatin is organized to promote the dynamic, complex transcriptomes of spermatogenesis. Here, using ATAC-seq, we establish the varied landscape of open chromatin during spermatogenesis. We identify the reorganization of accessible chromatin in intergenic and intronic regions during the mitosis-to-meiosis transition...
November 6, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/29124795/proteomic-analysis-of-lysine-acetylation-provides-strong-evidence-for-acetylated-proteins-involved-in-plant-meiosis-and-tapetum-function
#17
Xiaojing Li, Juanying Ye, Hong Ma, Pingli Lu
Protein lysine acetylation (KAC) is a dynamic and reversible post-translational modification, playing important biological roles in many organisms. Although KAC was shown to affect reproductive development and meiosis in yeast and animals, similar studies are largely lacking in flowering plants, especially in a proteome-scale investigation for a certain reproductive stage. Here, we reported results from a proteomic investigation to detect KAC status of the developing rice anthers near the time of meiosis (RAM), providing strong biochemical evidence for roles of many KAC-affected proteins during rice anther development and meiosis...
November 10, 2017: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/29120325/structural-insight-into-tpx2-stimulated-microtubule-assembly
#18
Rui Zhang, Johanna Roostalu, Thomas Surrey, Eva Nogales
During mitosis and meiosis, microtubule (MT) assembly is locally upregulated by the chromatin-dependent Ran-GTP pathway. One of its key targets is the MT-associated spindle assembly factor TPX2. The molecular mechanism of how TPX2 stimulates MT assembly remains unknown because structural information about the interaction of TPX2 with MTs is lacking. Here, we determine the cryo-electron microscopy structure of a central region of TPX2 bound to the MT surface. TPX2 uses two flexibly linked elements ('ridge' and 'wedge') in a novel interaction mode to simultaneously bind across longitudinal and lateral tubulin interfaces...
November 9, 2017: ELife
https://www.readbyqxmd.com/read/29118343/exosc10-rrp6-is-post-translationally-regulated-in-male-germ-cells-and-controls-the-onset-of-spermatogenesis
#19
Soazik P Jamin, Fabrice G Petit, Christine Kervarrec, Fatima Smagulova, Doris Illner, Harry Scherthan, Michael Primig
EXOSC10 is a catalytic subunit of the exosome that processes biologically active transcripts, degrades aberrant mRNAs and targets certain long non-coding RNAs (lncRNAs). The yeast orthologue Rrp6 is required for efficient growth and gametogenesis, and becomes unstable during meiosis. However, nothing is known about the localization, stability and function of EXOSC10 in the rodent male germline. We detect the protein in nucleoli and the cytoplasm of mitotic and meiotic germ cells, and find that it transiently associates with the XY body, a structure targeted by meiotic sex chromosome inactivation (MSCI)...
November 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29118076/the-meiosis-specific-cdc20-family-member-ama1-promotes-binding-of-the-ssp2-activator-to-the-smk1-map-kinase
#20
Gregory Omerza, Chong Wai Tio, Timothy Philips, Aviva Diamond, Aaron M Neiman, Edward Winter
Smk1 is a meiosis-specific MAP kinase (MAPK) in budding yeast that is required for spore formation. It is localized to prospore membranes (PSMs), the structures that engulf haploid cells during meiosis II (MII). Similar to canonically activated MAPKs, Smk1 is controlled by phosphorylation of its activation-loop threonine (T) and tyrosine (Y). However, activation loop phosphorylation occurs via a non-canonical two-step mechanism in which 1- the cyclin-dependent kinase activating kinase Cak1 phosphorylaytes T207 during MI and 2- Smk1 autophosphorylates Y209 as MII draws to a close...
November 8, 2017: Molecular Biology of the Cell
keyword
keyword
5205
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"