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Molecular Reproduction and Development

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https://www.readbyqxmd.com/read/29337420/a-proinflammatory-response-of-bovine-endometrial-epithelial-cells-to-active-sperm-in-vitro
#1
Ahmed Essam Elweza, Mohamed Aboul Ezz, Tomas J Acosta, Anup K Talukder, Takashi Shimizu, Hiroyuki Hayakawa, Masayuki Shimada, Kazuhiko Imakawa, Ahmed Hamed Zaghloul, Akio Miyamoto
In the cow, cryopreserved semen is inseminated into the uterus, and most of sperm are removed by backflow and phagocytes. Nevertheless, the mechanism responsible for sperm phagocytosis is unclear. Here, we used cultured bovine uterine epithelial cells (BUECs) to investigate the uterine response to sperm and the mechanism that activates polymorphonuclear neutrophils (PMNs). BUEC monolayers were co-cultured with different numbers of washed sperm obtained from cryopreserved semen (104 , 105 and 106 sperm/ml) for 3 h...
January 16, 2018: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/29337408/maternally-expressed-mir-379-mir-544-cluster-is-dispensable-for-testicular-development-and-spermatogenesis-in-mice
#2
Congcong Cao, Yujiao Wen, Juan Dong, Xiaoli Wang, Weibing Qin, Xunbin Huang, Shuiqiao Yuan
Increasing lines of evidence suggest that miRNAs are closely related to spermatogenesis and male infertility which has aroused widespread concerns.The miR-379/miR-544 locus is the largest known placental mammal-specific miRNA cluster, whose 24 miRNA genes are expressed only from the maternal allele, and located within the high conservation of the imprinted Dlk1â€"Dio3 region.A correct dosage of imprinted genes encoded at the mouse Dlk1-Dio3 genomic interval is essential for embryonic growth and postnatal survival, as well as for muscle growth, skeletal, and neuronal development...
January 16, 2018: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/29315945/inhibitory-effect-of-a-reproductive-related-serpin-on-sperm-trypsin-like-activity-implicates-its-role-in-sperm-maturation-of-penaeus-monodon
#3
Charoonroj Chotwiwatthanakun, Wanida Santimanawong, Prasert Sobhon, Somjai Wongtripop, Rapeepun Vanichviriyakit
In a number of marine animals, sperm serine proteases are important for fertilization. Penaeus monodon sperm require trypsin-like activity for a complete acrosome reaction, which exclusively occurs in sperm residing in the female thelycum. In this study, a complete cDNA sequence of reproductive tract-related Serine protease inhibitor (rrPmserpin) was identified. The longest open reading frame was composed of 1,366 nucleotides encoding 402 amino acids with a predicted pI of 6.86 and molecular mass of 44.88 kDa...
January 5, 2018: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/29280527/the-effects-of-superovulation-and-reproductive-aging-on-the-epigenome-of-the-oocyte-and-embryo
#4
REVIEW
Kira Lynn Marshall, Rocío Melissa Rivera
A societal preference of delaying maternal age at first childbirth has increased reliance on assisted reproductive technologies/therapies (ART) to conceive a child. Oocytes that have undergone physiologic aging (≥35 years for humans) are now commonly used for ART, yet evidence is building that suboptimal reproductive environments associated with aging negatively affect oocyte competence and embryo development - although the mechanisms underlying these relationship are not yet well understood. Epigenetic programming of the oocyte occurs during its growth within a follicle, so the ovarian stimulation protocols that administer exogenous hormones, as part of the first step for all ART procedures, may prevent the gamete from establishing an appropriate epigenetic state...
December 27, 2017: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/29271520/is-there-an-association-between-pawp-wbp2nl-sequence-expression-and-distribution-in-sperm-cells-and-fertilization-failures-in-icsi-cycles
#5
T Freour, M Barragan, M Torra-Massana, A Ferrer-Vaquer, R Vassena
Successful fertilization in mammals depends on the sperm's ability to initiate intracellular Ca2+ oscillations in the egg, a phenomenon that is elicited by Sperm-oocyte activating factors (SOAFs), whose quantitative and/or qualitative defect might result in fertilization failure. One such proposed factor is Post-acrosomal WW domain-binding protein (PAWP/WBP2NL), although its ability to activate human oocytes has been questioned and its implication in human fertilization failure remains unknown. Here, we sought to determine if PAWP/WBP2NL expression and distribution in sperm cells associate with low/complete fertilization failure in males participating in intracytoplasmic sperm injection (ICSI) cycles...
December 22, 2017: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/29266562/production-of-functional-sperm-by-subcutaneous-auto-grafting-of-immature-testes-in-rainbow-trout
#6
Makoto Hayashi, Daika Sakuma, Goro Yoshizaki
Sexually mature individuals are indispensable for breeding programs. Salmonids require a long period before reaching sexual maturity, so we aimed to shorten the period required to obtain functional sperm by grafting immature testicular fragments into mature recipients, which we predicted would allow the grafted testicular fragments to skip the long pre-pubertal period. First, we demonstrated successful subcutaneous auto-grafting of testicular fragments in rainbow trout. Unilateral testectomy was performed, and the isolated immature testicular fragment was auto-grafted into the subcutaneous space along the back of recipient fish...
December 21, 2017: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/29266626/a-transition-at-molecular-reproduction-and-development
#7
Harvey M Florman
Announcing a transition of editors at Molecular Reproduction and Development. This article is protected by copyright. All rights reserved.
December 20, 2017: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/29247588/oocyte-maturation-in-the-toad-rhinella-arenarum-amphibia-anura-evidence-of-camp-involvement-in-steroid-production-and-action
#8
Ana Josefina AriasTorres, José Bernardino Páez, Liliana Isabel Zelarayán
In this work, we describe the participation of the Adenylate cyclase/3'-5'-cyclic adenonsine monophosphate (cAMP) pathway in the seasonal follicular secretion of progesterone (P4 ) and testosterone (T), and its relationship with the maturation of Rhinella arenarum oocytes. Under gonadotropin stimulation, P4 secretion was the dominant steroid produced during the reproductive period, resulting in 100% germinal vesicle breakdown (GVBD) in oocytes in vitro; in contrast, T and estradiol (E2 ) secretion increased (∼16 nM/20 follicles and ∼80 pM/20 follicles, respectively) during the non-reproductive period, but only yielded 50% GVBD...
December 16, 2017: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/29247571/testis-specific-lypd9-is-dispensable-for-spermatogenesis-in-mouse
#9
Junyan Feng, Puping Liang, Yuxi Chen, Xiya Zhang, Zhou Songyang, Haiyan Zheng, Shanbo Cao, Junjiu Huang
Lypd9 is a member of the Ly6/uPAR family. While Lypd9, display testis-specific gene expression in mouse, its function remains obscure. We proved that Lypd9 is a secreted protein specifically expressed in mouse testis. To investigate the function of Lypd9 in male mouse reproduction, we generated Lypd9 knockout mice using the CRISPR/Cas9 system. Body weight and testis development of Lypd9 null mice were comparable to wildtype mice. We found that disruption of Lypd9 did not affect the number of spermatogonial stem cells, meiosis progression or XY body formation, as was determined by immunofluorescence staining with PLZF, SCP3 and î3 H2AX...
December 16, 2017: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/29247566/application-of-the-bacs-on-beadstm-assay-for-rapid-prenatal-detection-of-aneuploidies-and-microdeletions
#10
Hailong Huang, Min Zhang, Yan Wang, Na Lin, Deqin He, Meihuan Chen, Lingji Chen, Yuan Lin, Liangpu Xu
Prenatal diagnosis focuses on the detection of anatomic and physiologic problems with a foetus before birth. Karyotyping is currently considered the gold standard for prenatal diagnosis of chromosomal abnormalities, but this method can be time consuming. This study evaluated the diagnostic accuracy of the BACs-on-BeadsTM (BoBsTM ) assay for the rapid diagnosis of aneuploidies and microdeletions. A total of 625 samples from pregnant women in Fujian province, in southeastern China - including 3 chorionic villus biopsies, 523 amniotic fluid samples, and 99 umbilical-cord centesis samples - were assessed for chromosomal abnormalities by karyotyping and by the BoBsTM assay...
December 16, 2017: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/29247565/oocyte-oxidative-dna-damage-may-be-involved-in-minimal-mild-endometriosis-related-infertility
#11
Michele Gomes Da Broi, Alceu Afonso Jordão-Jr, Rui Alberto Ferriani, Paula Andrea Navarro
Early endometriosis is associated with infertility, and oxidative stress may play a role in the pathogenesis of disease-related infertility. This prospective case-control study aimed to compare the presence of oxidative stress markers in the follicular microenvironment and systemic circulation of infertile women with minimal/mild endometriosis (EI/II) versus individuals undergoing controlled ovarian stimulation for intracytoplasmic sperm injection (ICSI). Seventy-one blood samples (27 from infertile women with EI/II and 44 controls with tubal and/or male infertility factor) and 51 follicular fluid samples (19 EI/II and 32 controls) were obtained on the day of oocyte retrieval...
December 16, 2017: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/29243855/non-invasive-placentation-in-the-marsupials-macropus-eugenii-macropodidae-and-trichosurus-vulpecula-phalangeridae-involves-redistribution-of-uterine-desmoglein-2
#12
Melanie K Laird, Hanon McShea, Christopher R Murphy, Bronwyn M McAllan, Geoff Shaw, Marilyn B Renfree, Michael B Thompson
In mammalian pregnancy, the uterus is remodelled to become receptive to embryonic implantation. Since non-invasive placentation in marsupials is likely derived from invasive placentation, and is underpinned by intra-uterine conflict between mother and embryo, species with non-invasive placentation may employ a variety of molecular mechanisms to maintain an intact uterine epithelium and to prevent embryonic invasion. Identifying such modifications to the uterine epithelium of marsupial species with non-invasive placentation is key to understanding how conflict is mediated during pregnancy in different mammalian groups...
December 15, 2017: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/29240275/metabolic-stress-induces-modifications-in-the-epigenetic-program-of-preimplantation-bovine-embryos
#13
R Tremblay, I Dufort, M A Sirard
The mammalian embryo is sensitive to and adapts to its metabolic environment. The mother's metabolic health and nutrient availability, for example, can modulate the oviductal fluid composition and thus embryo development. In this project, we induced energetic stress in bovine embryos during early culture to observe the epigenetic responses associated with metabolic stress, using a treatment paradigm known to decrease blastocyst rates. Embryos were generated using oocytes from slaughtered cows, and then exposed to an elevated glucose concentration (5 mM versus 0...
December 14, 2017: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/29232016/characterization-of-h3-3-and-hira-expression-and-function-in-bovine-early-embryos
#14
Kun Zhang, Han Wang, Sandeep K Rajput, Joseph K Folger, George W Smith
Histone variant H3.3 is encoded by two distinct genes, H3F3A and H3F3B, that are closely associated with actively transcribed genes. H3.3 replacement is continuous and essential for maintaining correct chromatin structure during mouse oogenesis. Upon fertilization, H3.3 is incorporated to parental chromatin, and is required for blastocyst formation in mice. The H3.3 exchange process is facilitated by the chaperone HIRA, particularly during zygote development. We previously demonstrated that H3.3 is required for bovine early embryonic development; here, we explored the mechanisms of its functional requirement...
December 12, 2017: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/29226557/lysophosphatidic-acid-accelerates-development-of-porcine-embryos-by-activating-formation-of-the-blastocoel
#15
Min-Young Shin, Seung-Eun Lee, Yeo-Jin Son, Yun-Gwi Park, Sang-Gi Jeong, Eun-Young Kim, Se-Pill Park
Culture media modifications, including the addition of various factors, are important for the in vitro production of oocytes and embryos. In this study, we investigated the effects of lysophosphatidic acid (LPA) on porcine embryo development. Porcine parthenogenetic embryos were cultured with 0, 0.1, 1, and 10 μM LPA for 7 days, or cultured in basic medium until Day 4 and then treated with LPA from Days 4 to 7. No difference in the in vitro development of embryos cultured with LPA for 7 days was observed. Conversely, rates of blastocyst and over-expanded blastocyst formation were higher in the 0...
December 11, 2017: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/29219221/improved-developmental-competence-in-embryos-treated-with-lycopene-during-in-vitro-culture
#16
M M R Chowdhury, Ayman Mesalam, Imran Khan, Myeong-Don Joo, Kyeong-Lim Lee, Lianguang Xu, Fahmida Afrin, Il-Keun Kong
In vitro embryo development remains suboptimal compared to in vivo development due to the challenge from various stressors associated with in vitro culturing of oocytes. When 0.2 μM lycopene was added to oocyte in vitro maturation and embryo culture media, to assess its antioxidant effects on embryo development, we observed a significant (p<0.05) increase in cleavage and blastocyst development rates compared to the corresponding controls (84.3 ± 0.6% vs. 73.1 ± 1.9% and 41.0 ± 1.4% vs. 33.4 ± 0.7%, respectively)...
December 8, 2017: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/29205681/meroistic-oogenesis-of-drosophila-in-section-in-situ
#17
Alexandra L Mattei, Mariana F Wolfner
Some insects, such as Drosophila melanogaster, produce eggs by meroistic oogenesis. In this process, the developing oocyte remains connected by cytoplasmic bridges to its sister "nurse" cells, which synthesize molecules and organelles for the future embryo. In the ovary, shown brighter in this micro-CT (X-ray computed tomography) scan of the abdomen of a female fly at 8 h post-mating, egg-chambers made of oocyte and nurse cells are lined up progressively in tubules called ovarioles.
December 4, 2017: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/29205619/bapta-am-dramatically-improves-maturation-and-development-of-bovine-oocytes-from-grade-3-cumulus-oocyte-complexes
#18
Hongmei Hu, Xianhong Mo, Xue Li, Xiangwei Fu, Yunpeng Hou
Intracellular free calcium ([Ca2+ ]i ) is essential for oocyte maturation and early embryonic development. Here, we investigated the role of [Ca2+ ]i in oocytes from cumulus-oocyte complexes (COCs) with respect to maturation and early embryonic development, using the calcium-buffering agent BAPTA-AM (1,2-bis[2-aminophenoxy]ethane-N,N,N',N'-tetraacetic acid tetrakis [acetoxymethyl ester]). COCs were graded based on compactness of the cumulus mass and appearance of the cytoplasm, with Grade 1 indicating higher quality and developmental potential than Grade 3...
December 4, 2017: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/29205617/epigenetic-states-of-donor-cells-significantly-affect-the-development-of-somatic-cell-nuclear-transfer-scnt-embryos-in-pigs
#19
Yanhui Zhai, Wei Li, Zhiren Zhang, Yunqing Cao, Zhengzhu Wang, Sheng Zhang, Ziyi Li
The type and pattern of epigenetic modification in donor cells can significantly affect the developmental competency of somatic cell nuclear transfer (SCNT) embryos. Here, we investigated the developmental capacity, gene expression, and epigenetic modifications of SCNT embryos derived from porcine bone marrow-derived mesenchymal stem cells (BMSCs) and fetal fibroblasts (FFs) donor cells compared to embryos obtained from in vitro fertilization (IVF). Compared to FFs, the donor BMSCs had more active epigenetic markers (Histone H3 modifications: H3K9Ac, H3K4me3, and H3K4me2) and fewer repressive epigenetic markers (H3K9me3, H3K9me2, and DNA methyltransferase 1)...
December 4, 2017: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/29178559/arid1a-a-component-of-swi-snf-chromatin-remodeling-complexes-is-required-for-porcine-embryo-development
#20
Yu-Chun Tseng, Birgit Cabot, Ryan A Cabot
Mammalian embryos undergo dramatic epigenetic remodeling that can have a profound impact on both gene transcription and overall embryo developmental competence. Members of the SWI/SNF (Switch/Sucrose non-fermentable) family of chromatin-remodeling complexes reposition nucleosomes and alter transcription factor accessibility. These large, multi-protein complexes possess an SNF2-type ATPase (either SMARCA4 or SMARCA2) as their core catalytic subunit, and are directed to specific loci by associated subunits. Little is known about the identity of specific SWI/SNF complexes that serve regulatory roles during cleavage development...
November 26, 2017: Molecular Reproduction and Development
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