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https://www.readbyqxmd.com/read/28333241/dysmorphic-patterns-are-associated-with-cytoskeletal-alterations-in-human-oocytes
#1
Mariabeatrice Dal Canto, Maria Cristina Guglielmo, Mario Mignini Renzini, Rubens Fadini, Clarissa Moutier, Maria Merola, Elena De Ponti, Giovanni Coticchio
Study Question: Are specific morphological anomalies in human mature oocytes, as revealed by transmitted light microscopy, associated with intrinsic damage to the meiotic spindle and actin cytoskeleton? SUMMARY ANSWER: Aggregates of smooth endoplasmic reticulum (SER) and domains of centrally localized granular cytoplasm (GC) reflect intrinsic damage to the oocyte cytoskeleton, namely alterations in spindle size, chromosome misalignment and cortical actin disorganization...
March 1, 2017: Human Reproduction
https://www.readbyqxmd.com/read/28329872/doxorubicin-has-dose-dependent-toxicity-on-mouse-ovarian-follicle-development-hormone-secretion-and-oocyte-maturation
#2
Shuo Xiao, Jiyang Zhang, Mingjun Liu, Hideyuki Iwahata, Hunter B Rogers, Teresa K Woodruff
Doxorubicin (DOX), one of the most commonly used anticancer medications, has been reported to affect fertility by damaging ovarian follicles; however, the dose-dependent toxicity of DOX on the dynamic follicle development and oocyte maturation has not been well-defined. Our objective is to determine the effects of human-relevant exposure levels of DOX on follicular functions across developmental time. In vitro cultured multilayered secondary mouse follicles were treated with DOX at 0, 2, 20, 100, and 200 nM for 24 hours, and follicle development, hormone secretion, and oocyte maturation were analyzed...
March 17, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/28328856/the-influence-of-different-growth-hormone-addition-protocols-to-poor-ovarian-responders-on-clinical-outcomes-in-controlled-ovary-stimulation-cycles-a-systematic-review-and-meta-analysis
#3
Xue-Li Li, Li Wang, Fang Lv, Xia-Man Huang, Li-Ping Wang, Yu Pan, Xiao-Mei Zhang
BACKGROUND: Growth hormone (GH) is used as an adjuvant therapy in in vitro fertilization and embryo transfer (IVF-ET) for poor ovarian responders, but findings for its effects on outcomes of IVF have been conflicting. The aim of the study was to compare IVF-ET outcomes among women with poor ovarian responders, and find which subgroup can benefit from the GH addition. METHODS: We searched the databases, using the terms "growth hormone," "GH," "IVF," "in vitro fertilization...
March 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28327364/telomere-length-analysis-in-down-syndrome-birth
#4
Pranami Bhaumik, Mandar Bhattacharya, Priyanka Ghosh, Sujoy Ghosh, Subrata Kumar Dey
Human reproductive fitness depends upon telomere chemistry. Maternal age, meiotic nondisjunction error and telomere length of mother of trisomic child are someway associated. Reports exhibiting maternal inheritance of telomere length in Down syndrome child are very scanty. To investigate this, we collected peripheral blood from 170 mothers of Down syndrome child and 186 age matched mothers of euploid child with their newly born babies. Telomere length was measured by restriction digestion - southern blotting technique...
March 19, 2017: Mechanisms of Ageing and Development
https://www.readbyqxmd.com/read/28324667/gtpase-activating-protein-elmod2-is-essential-for-meiotic-progression-in-mouse-oocytes
#5
Chun-Xiang Zhou, Li-Ya Shi, Rui-Chao Li, Ya-Hong Liu, Bo-Qun Xu, Jin-Wei Liu, Bo Yuan, Zhi-Xia Yang, Xiao-Yan Ying, Dong Zhang
Meiotic failure in oocytes is the major determinant of human zygote-originated reproductive diseases, the successful accomplishment of meiosis largely relay on the normal functions of many female fertility factors. Elmod2 is a member of the Elmod family with the strongest GAP (GTPase-activating protein) activity; although it was identified as a possible maternal protein, its actual physiologic role in mammalian oocytes has not been elucidated. Herein we reported that among Elmod family proteins, Elmod2 is the most abundant in mouse oocytes, and that inhibition of Elmod2 by specific siRNA caused severe meiotic delay and abnormal chromosomal segregation during anaphase...
March 21, 2017: Cell Cycle
https://www.readbyqxmd.com/read/28322211/prey-species-of-franciscana-pontoporia-blainvillei-as-paratenic-hosts-of-helminths
#6
Tony Silveira, Mariana H Remião, Ricardo B Robaldo, Kaio Freitas, Ana Luísa S Valente
The distribution of franciscana Pontoporia blainvillei Gervais & d'Orbigny, 1884, is restricted to the estuarine and coastal waters of the southwestern Atlantic. The diet of this dolphin is composed of fishes, squids, and shrimps, many of which harbor helminths that may infect franciscana. Larval forms of the trematode Synthesium pontoporiae and the acanthocephalan Bolbosoma turbinella have been recorded in franciscana; however, they have not yet been identified in any of the prey species of this cetacean. We evaluated 3 components of the diet of franciscana as possible transmission sources of parasitiasis...
March 21, 2017: Diseases of Aquatic Organisms
https://www.readbyqxmd.com/read/28293053/effect-of-melatonin-on-the-outcome-of-assisted-reproductive-technique-cycles-in-women-with-diminished-ovarian-reserve-a-double-blinded-randomized-clinical-trial
#7
Bahia Namavar Jahromi, Sara Sadeghi, Shohreh Alipour, Mohammad Ebrahim Parsanezhad, Shaghayegh Moradi Alamdarloo
Diminished ovarian reserve (DOR) significantly decreases the success rate of the assisted reproductive technique (ART). In this study, we assessed the effect of melatonin on the ART outcomes in women with DOR. A double-blinded, randomized, clinical trial was performed on 80 women with DOR as a pilot study in Shiraz, between 2014 and 2015. DOR was defined as the presence of 2 of the following 3 criteria: 1) anti-Müllerian hormone ≤1, 2) follicle-stimulating hormone ≥10, and 3) bilateral antral follicle count ≤6...
January 2017: Iranian Journal of Medical Sciences
https://www.readbyqxmd.com/read/28287092/loss-of-centromere-cohesion-in-aneuploid-human-oocytes-correlates-with-decreased-kinetochore-localization-of-the-sac-proteins-bub1-and-bubr1
#8
Julie Lagirand-Cantaloube, Cendrine Ciabrini, Sophie Charrasse, Alice Ferrieres, Anna Castro, Tal Anahory, Thierry Lorca
In human eggs, aneuploidy increases with age and can result in infertility and genetic diseases. Studies in mouse oocytes suggest that reduced centromere cohesion and spindle assembly checkpoint (SAC) activity could be at the origin of chromosome missegregation. Little is known about these two features in humans. Here, we show that in human eggs, inter-kinetochore distances of bivalent chromosomes strongly increase with age. This results in the formation of univalent chromosomes during metaphase I (MI) and of single chromatids in metaphase II (MII)...
March 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28285073/development-of-an-uplc-ms-ms-method-for-quantification-of-avitinib-ac0010-and-its-five-metabolites-in-human-cerebrospinal-fluid-application-to-a-study-of-the-blood-brain-barrier-penetration-rate-of-non-small-cell-lung-cancer-patients
#9
Weicong Wang, Xin Zheng, Hanping Wang, Lu Wang, Ji Jiang, Pei Hu
Avitinib (AC0010) is a mutant-selective epidermal growth factor receptor tyrosine kinase inhibitors (EGFR-TKI), designed to be a targeted therapeutic agent for non-small cell lung cancer (NSCLC) patients harboring EGFR active and T790M resistant mutations. A rapid and sensitive ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) method was developed and validated for the determination of Avitinib and its five metabolites (M1, M2, M4, M7, MII-6) in human cerebrospinal fluid (CSF). The samples were purified by protein precipitation and separated on a BEH C18 column (2...
March 4, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28277744/a-modified-vitrification-method-reduces-spindle-and-chromosome-abnormalities
#10
Minghui Liu, Wenhui Zhou, Dapeng Chu, Lei Fu, Wei Sha, Shan Liu, Yuan Li
Development of an effective system for oocyte-cryopreservation is of clinical relevance in reproductive medicine. However, oocyte-preservation is not as effective as embryo preservation. In this study, we used a 37°C pre-equilibrium temperature as part of a modified vitrification method for human oocyte cryopreservation. The effect of the new method on spindle configuration, chromosomal arrangement, and mitochondrial distribution was investigated in in vitro-matured human oocytes. A total of 101 in vitro-matured oocytes were randomly assigned for vitrification at pre-equilibrium temperature of 37°C (37°C Group, n=50) or at room temperature (RT Group, 22-24°C, n=51)...
March 9, 2017: Systems Biology in Reproductive Medicine
https://www.readbyqxmd.com/read/28267432/haploid-parthenotes-express-differential-response-to-in%C3%A2-vitro-exposure-of-ammonia-compared-to-normally-fertilized-embryos
#11
Ramya Nair, Srinivas Mutalik, Jagadeesh Prasad Dasappa, Guruprasad Kalthur, Satish Kumar Adiga
In the present study, we assessed whether absence of paternal genome imparts any differential response in embryos to chemical stress such as ammonia. Parthenogenesis was induced in MII stage oocytes using 10 mM SrCl2 in M16 medium. Parthenotes and normally fertilized embryos at 2 cell stage were exposed to different concentrations of ammonia and cultured till blastocyst. Exposure of ammonia to normally fertilized embryos resulted in significant decrease in the developmental potential (p < 0.0001) and blastocyst quality (p < 0...
April 22, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28266868/mitogen-activated-protein-kinase-activity-is-not-essential-for-the-first-step-of-nuclear-reprogramming-in-bovine-somatic-cell-nuclear-transfer
#12
Tetsuya Tani, Yoko Kato
For reprogramming a somatic nucleus during mammalian cloning, metaphase of the second meiotic division (MII) oocytes has been widely used as recipient cytoplasm. High activity of maturation-promoting factor (MPF) and mitogen-activated protein kinase (MAPK) is believed to accelerate the remodeling and/or reprogramming of a somatic nucleus introduced into the ooplasm by somatic cell nuclear transfer. We demonstrated previously that the first step in nuclear reprogramming is not directly regulated by MPF and MAPK because activated oocytes in which MPF activity is diminished and MAPK activity is maintained can develop to the blastocyst stage after receiving an M phase somatic nucleus in bovine cloning...
March 7, 2017: Cellular Reprogramming
https://www.readbyqxmd.com/read/28264747/oocyte-morphology-and-embryo-morphokinetics-in-an-intra-cytoplasmic-sperm-injection-programme-is-there-a-relationship
#13
Azita Faramarzi, Mohammad Ali Khalili, Sareh Ashourzadeh
The aim was to investigate the relationship between the morphological parameters of metaphase II (MII) oocytes with morphokinetic variables of embryos following an intra-cytoplasmic sperm injection (ICSI) procedure. Morphokinetic behaviour and abnormal cleavage patterns of 334 zygotes were analyzed using time-lapse monitoring (TLM). In addition, oocyte morphology was assessed in relation to embryo morphokinetic (absolute time point, including time to second polar body (PB) extrusion (ESPB), pronuclei (PN) appearance (PNA), PN fading (PNF), time to 2-cells (t2), 3c (t3), 4c (t4), 5c (t5), 6c (t6), 7c (t7), 8c (t8) and relative timing parameters (S1, S2, CC2 and CC3)...
March 7, 2017: Zygote: the Biology of Gametes and Early Embryos
https://www.readbyqxmd.com/read/28251599/an-iliac-arterial-pseudoaneurysm-diagnosed-40%C3%A2-years-after-suffering-blunt-trauma
#14
Atsushi Guntani, Eisuke Kawakubo, Shinsuke Mii
BACKGROUND: A chronic iliac arterial pseudoaneurysm caused by blunt trauma is very rare. CASE PRESENTATION: The patient had gunshot wound in the right thigh and blunt trauma 40 years earlier. An abdominal computed tomography revealed the presence of a right iliac arterial pseudoaneurysm, and we successfully treated the pseudoaneurysm by resection and in situ reconstruction with a bifurcated vascular prosthesis. CONCLUSIONS: We herein present a rare case of a pseudoaneurysm of the right iliac artery diagnosed decades after blunt trauma...
December 2017: Surgical Case Reports
https://www.readbyqxmd.com/read/28247100/relationship-between-pre-icsi-meiotic-spindle-angle-ovarian-reserve-gonadotropin-stimulation-and-pregnancy-outcomes
#15
Alina M Mahfoudh, Jeong H Moon, Sara Henderson, Elena Garcia-Cerrudo, Weon-Young Son, Michael H Dahan
PURPOSE: The goals of this study are to analyze the clinical pregnancy rate as a function of the pre-intracytoplasmic sperm injection (ICSI) oocyte spindle angle and determine factors which can be associated with different spindle angles, if clinically relevant. METHODS: Fifty-eight patients, who underwent their first ICSI cycle from January to December 2013, were included. Eight hundred thirty oocytes were collected, and 648 were metaphase II (MII) on retrieval day...
February 28, 2017: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/28244334/sensitivity-of-the-meiotic-stage-to-hyperthermia-during-in-vitro-maturation-of-porcine-oocytes
#16
Katsutoshi Nishio, Mado Yamazaki, Masayasu Taniguchi, Kazuhiko Besshi, Fumio Morita, Toshiki Kunihara, Fuminori Tanihara, Tatsuya Takemoto, Takeshige Otoi
The present study was conducted to clarify whether the meiotic stage of porcine oocytes has the highest sensitivity to hyperthermia during in vitro maturation by evaluating meiotic competence and DNA damage. Oocytes were exposed to 41 °C for 12 h at various intervals during 48 h of maturation culture. When the oocytes were exposed to 41 °C from 12 to 24 h of the maturation culture, the proportion of oocytes reaching metaphase II (MII) decreased as compared to the control oocytes cultured at 38.5 °C (P < 0...
March 2017: Acta Veterinaria Hungarica
https://www.readbyqxmd.com/read/28242396/aggressive-wound-care-by-a-multidisciplinary-team-improves-wound-healing-after-infrainguinal-bypass-in-patients-with-critical-limb-ischemia
#17
Shinsuke Mii, Kiyoshi Tanaka, Ryoichi Kyuragi, Hiroshi Ishimura, Shinsuke Yasukawa, Atsushi Guntani, Eisuke Kawakubo
BACKGROUND: A long period is generally required for ischemic ulcer to heal after revascularization. The strategy of postoperative wound care can affect wound healing. This study was conducted to investigate the degree to which aggressive wound care (AWC) by a team of multidisciplinary specialists actually shortens the time to wound healing and increases the rate of wound healing in limbs undergoing surgical bypass for ischemic tissue loss in a real clinical setting. METHODS: A total of consecutive 126 patients undergoing infrainguinal bypass for tissue loss from April 2011 to March 2015 were reviewed...
February 24, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28228962/conforming-with-current-regulation-in-turkey-regarding-the-freezing-of-oocytes-a-case-report-of-the-first-pregnancy-in-turkey-achieved-through-oocyte-vitrification
#18
Semra Kahraman, Kahraman Ulker, Caroline Pirkevi Çetinkaya, Yesim Kumtepe Colakoglu, Hakan K Yelke, Cihangir Yilanlioglu
OBJECTIVES: To present the first pregnancy achieved in Turkey with frozen-warmed oocytes in a case with previous nine unsuccessful assisted reproductive technology (ART) attempts. METHODS: The clinical follow-up of a 33-year-old female applying to our ART centre after a long and complicated history of infertility is described. RESULTS: In April 2013, the woman attempted our centre for her 10th ART trial. She informed us on oocyte pick-up (OPU) day that her husband had been hospitalized following a car crush in Albania and was unable to travel to our clinic to give a sperm sample...
2017: SAGE open medical case reports
https://www.readbyqxmd.com/read/28223544/hdac8-functions-in-spindle-assembly-during-mouse-oocyte-meiosis
#19
Kemei Zhang, Yajuan Lu, Chaohua Jiang, Wei Liu, Jing Shu, Xueqin Chen, Yingjiao Shi, Ensheng Wang, Li Wang, Qinbo Hu, Yibo Dai, Bo Xiong
HDAC8 is a class I histone deacetylase that functions in a variety of biological processes through its non-histone substrates. However, its roles during oocyte meiosis remain elusive. Here, we document that HDAC8 localizes at spindle poles and positively participates in the regulation of microtubule organization and spindle assembly in mouse oocytes. Depletion of HDAC8 by siRNA-based gene silencing results in various spindle defects and chromosome misalignment during oocyte meiotic maturation, accompanied by impaired kinetochore-microtubule attachments...
February 16, 2017: Oncotarget
https://www.readbyqxmd.com/read/28222427/impact-of-fmr1-pre-mutation-status-on-blastocyst-development-in-patients-undergoing-pre-implantation-genetic-diagnosis
#20
Anne P Hutchinson, Nigel Pereira, Debra P Lilienthal, Siobhán Coveney, Jovana P Lekovich, Rony T Elias, Zev Rosenwaks
BACKGROUND/AIMS: The study aimed to investigate the impact of fragile X mental retardation 1 (FMR1) pre-mutation status on blastocyst development in patients undergoing pre-implantation genetic diagnosis (PGD). METHODS: Case-control study of patients <40 years undergoing PGD at blastocyst stage for FMR1 pre-mutation status. Age-matched patients undergoing PGD for other single gene disorders were considered controls. Blastocyst development, calculated per metaphase II (MII) oocyte retrieved and per 2 pronuclear (2PN) embryos, was compared between the 2 groups...
February 22, 2017: Gynecologic and Obstetric Investigation
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