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https://www.readbyqxmd.com/read/28940399/capturing-chaotic-chromosomes-pairing-in-action
#1
Micka C Bertucci, Arunika Das, Harriet C Fitzgerald, Daniel E Goszczynski
Accurate chromosome segregation is critical for the formation of haploid gametes, and therefore healthy offspring. Errors in segregation result in aneuploidy, which increases exponentially with maternal age (Hassold and Hunt, 2001). Maternally aged mouse oocytes were recently found to exhibit premature sister chromatid separation due to reduced levels of Securin, an essential regulator of sister chromatid cohesion (Nabti et al, 2017). This article is protected by copyright. All rights reserved.
September 20, 2017: Molecular Reproduction and Development
https://www.readbyqxmd.com/read/28854188/correction-germline-and-reproductive-tract-effects-intensify-in-male-mice-with-successive-generations-of-estrogenic-exposure
#2
Tegan S Horan, Alyssa Marre, Terry Hassold, Crystal Lawson, Patricia A Hunt
[This corrects the article DOI: 10.1371/journal.pgen.1006885.].
August 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28727826/germline-and-reproductive-tract-effects-intensify-in-male-mice-with-successive-generations-of-estrogenic-exposure
#3
Tegan S Horan, Alyssa Marre, Terry Hassold, Crystal Lawson, Patricia A Hunt
The hypothesis that developmental estrogenic exposure induces a constellation of male reproductive tract abnormalities is supported by experimental and human evidence. Experimental data also suggest that some induced effects persist in descendants of exposed males. These multi- and transgenerational effects are assumed to result from epigenetic changes to the germline, but few studies have directly analyzed germ cells. Typically, studies of transgenerational effects have involved exposing one generation and monitoring effects in subsequent unexposed generations...
July 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28262352/inefficient-crossover-maturation-underlies-elevated-aneuploidy-in-human-female-meiosis
#4
Shunxin Wang, Terry Hassold, Patricia Hunt, Martin A White, Denise Zickler, Nancy Kleckner, Liangran Zhang
Meiosis is the cellular program that underlies gamete formation. For this program, crossovers between homologous chromosomes play an essential mechanical role to ensure regular segregation. We present a detailed study of crossover formation in human male and female meiosis, enabled by modeling analysis. Results suggest that recombination in the two sexes proceeds analogously and efficiently through most stages. However, specifically in female (but not male), ∼25% of the intermediates that should mature into crossover products actually fail to do so...
March 9, 2017: Cell
https://www.readbyqxmd.com/read/28256907/proximal-occlusion-of-unaffected-internal-iliac-artery-versus-distal-occlusion-of-aneurysmatic-internal-iliac-artery-prior-to-evar-a-comparative-evaluation-of-efficacy-and-clinical-outcome
#5
COMPARATIVE STUDY
Alexander Dierks, Alexander Sauer, Franziska Wolfschmidt, Nicole Hassold, Richard Kellersmann, Thorsten A Bley, Ralph Kickuth
OBJECTIVE: Occlusion of the internal iliac artery (IIA) may be necessary prior to endovascular aneurysm repair (EVAR) to prevent endoleak Type II. We compared efficacy and clinical outcome after proximal occlusion of an unaffected IIA (ProxEmbx) using an Amplatzer vascular plug (AVP) I vs distal occlusion of aneurysmatic IIA with coils and plugs (DistEmbx). METHODS: Between 2009 and 2012, 22 patients underwent EVAR. In 9 patients with unaffected IIA, occlusion was performed by a single AVP...
April 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/27716516/dorothy-warburton-1936-2016
#6
Terry Hassold, Ernest B Hook, Patricia A Jacobs
No abstract text is available yet for this article.
October 6, 2016: American Journal of Human Genetics
https://www.readbyqxmd.com/read/27462001/effectiveness-and-outcome-of-endovascular-therapy-for-late-onset-postpancreatectomy-hemorrhage-using-covered-stents-and-embolization
#7
COMPARATIVE STUDY
Nicole Hassold, Franziska Wolfschmidt, Alexander Dierks, Ingo Klein, Thorsten Bley, Ralph Kickuth
OBJECTIVE: The purpose of this study was to evaluate the clinical and long-term outcome of patients who underwent covered stent treatment because of late-onset postpancreatectomy hemorrhage in a greater number of patients. A secondary study goal was to compare embolization techniques with covered stents regarding differences in early and late clinical outcome, rebleeding, and vessel patency. METHODS: Between December 2008 and June 2015, 27 consecutive patients suffering from major hemorrhage after pancreatic surgery underwent either covered stent placement or embolization of the affected visceral artery...
November 2016: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/27457791/caipirinha-accelerated-t1w-3d-flash-for-small-bowel-mr-imaging-in-pediatric-patients-with-crohn-s-disease-assessment-of-image-quality-and-diagnostic-performance
#8
Mengxia Li, Anke Dick, Nicole Hassold, Thomas Pabst, Thorsten Bley, Herbert Köstler, Henning Neubauer
BACKGROUND: The "Controlled Aliasing In Parallel Imaging Results In Higher Acceleration" (CAPIRINHA) technique greatly accelerates T1w 3D fast low angle shot (FLASH) scans while maintaining high image quality. We studied image quality and conspicuity of inflammatory lesions on CAIPIRINHA-accelerated imaging for pediatric small-bowel magnetic resonance imaging (MRI). METHODS: Forty-four consecutive patients (mean 14±3 years, 18 girls) underwent small-bowel MRI (MR enterography, MRE) at 1...
November 2016: World Journal of Pediatrics: WJP
https://www.readbyqxmd.com/read/27385152/hemostatic-wound-dressing-for-postinterventional-hemostasis-in-large-femoral-artery-access-sites-an-initial-efficacy-and-safety-study
#9
Alexander Sauer, Alexander Dierks, Franziska Wolfschmidt, Nicole Hassold, Thorsten A Bley, Ralph Kickuth
PURPOSE: To present the results of a prospective single-center study that evaluated the safety and efficacy of a hemostatic dressing following femoral artery access. METHODS: Within a 9-month period, 80 patients (mean age 68±14 years; 55 men) were treated with a hemostatic dressing patch (Hematrix Active Patch) containing aminocaproic acid, calcium chloride, and thrombin after endovascular procedures via a 6- to 8-F femoral artery access. After removing the sheath, the wound dressing was placed on the puncture site followed by constant manual compression adapted to the sheath size (specified pressure times: 8 minutes for 6-F, 9 minutes for 7-F, and 10 minutes for 8-F)...
October 2016: Journal of Endovascular Therapy
https://www.readbyqxmd.com/read/27362258/dna-barcoding-of-malagasy-rosewoods-towards-a-molecular-identification-of-cites-listed-dalbergia-species
#10
Sonja Hassold, Porter P Lowry, Martin R Bauert, Annick Razafintsalama, Lolona Ramamonjisoa, Alex Widmer
Illegal selective logging of tropical timber is of increasing concern worldwide. Madagascar is a biodiversity hotspot and home to some of the world's most sought after tropical timber species. Malagasy rosewoods belong to the genus Dalbergia (Fabaceae), which is highly diverse and has a pantropical distribution, but these timber species are among the most threatened as a consequence of intensive illegal selective logging and deforestation. Reliable identification of Dalbergia species from Madagascar is important for law enforcement but is almost impossible without fertile plant material, which is often unavailable during forest inventories or when attempting to identify logged trees of cut wood...
2016: PloS One
https://www.readbyqxmd.com/read/25902186/aortic-dissection-accurate-subintimal-flap-fenestration-by-using-a-reentry-catheter-with-fluoroscopic-guidance-initial-single-institution-experience
#11
Franziska Wolfschmidt, Nicole Hassold, Jan Peter Goltz, Rainer Leyh, Thorsten Alexander Bley, Ralph Kickuth
PURPOSE: To evaluate the feasibility, effectiveness, and safety of using a commercially available reentry catheter with fluoroscopic guidance to gain controlled target lumen reentry for fenestration in patients with aortic dissection. MATERIALS AND METHODS: This retrospective study was approved by the local institutional review board; informed consent was waived. Between April 2009 and December 2013, 13 consecutive patients (10 men and three women; mean age, 51...
September 2015: Radiology
https://www.readbyqxmd.com/read/25615633/estrogenic-exposure-alters-the-spermatogonial-stem-cells-in-the-developing-testis-permanently-reducing-crossover-levels-in-the-adult
#12
Lisa A Vrooman, Jon M Oatley, Jodi E Griswold, Terry J Hassold, Patricia A Hunt
Bisphenol A (BPA) and other endocrine disrupting chemicals have been reported to induce negative effects on a wide range of physiological processes, including reproduction. In the female, BPA exposure increases meiotic errors, resulting in the production of chromosomally abnormal eggs. Although numerous studies have reported that estrogenic exposures negatively impact spermatogenesis, a direct link between exposures and meiotic errors in males has not been evaluated. To test the effect of estrogenic chemicals on meiotic chromosome dynamics, we exposed male mice to either BPA or to the strong synthetic estrogen, ethinyl estradiol during neonatal development when the first cells initiate meiosis...
January 2015: PLoS Genetics
https://www.readbyqxmd.com/read/25007910/pseudoaneurysms-of-the-right-hepatic-artery-causing-obstructive-jaundice-endovascular-management
#13
Nicole Hassold, Franziska Wolfschmidt, Thorsten Bley, Ralph Kickuth, Jan P Goltz
No abstract text is available yet for this article.
July 2014: VASA. Zeitschrift Für Gefässkrankheiten
https://www.readbyqxmd.com/read/24995869/examining-variation-in-recombination-levels-in-the-human-female-a-test-of-the-production-line-hypothesis
#14
Ross Rowsey, Jennifer Gruhn, Karl W Broman, Patricia A Hunt, Terry Hassold
The most important risk factor for human aneuploidy is increasing maternal age, but the basis of this association remains unknown. Indeed, one of the earliest models of the maternal-age effect--the "production-line model" proposed by Henderson and Edwards in 1968--remains one of the most-cited explanations. The model has two key components: (1) that the first oocytes to enter meiosis are the first ovulated and (2) that the first to enter meiosis have more recombination events (crossovers) than those that enter meiosis later in fetal life...
July 3, 2014: American Journal of Human Genetics
https://www.readbyqxmd.com/read/24792151/the-predictability-of-mixture-toxicity-of-demethylase-inhibiting-fungicides-to-daphnia-magna-depends-on-life-cycle-parameters
#15
Enken Hassold, Thomas Backhaus
A variety of different fungicides are found simultaneously in surface waters, among which demethylase inhibitors (DMIs) are a major group. The joint toxicity of four DMIs from different chemical classes (Fenarimol, Prochloraz, Triadimefon and Pyrifenox) was investigated in the reproduction test with Daphnia magna, following an extended protocol according to ISO 10706. We assessed the toxicity of the DMI mixtures across different endpoints and effect levels and evaluated the predictability of their joint action using Concentration Addition (CA) and Independent Action (IA)...
July 2014: Aquatic Toxicology
https://www.readbyqxmd.com/read/24575889/hit-the-mark-with-diffusion-weighted-imaging-metastases-of-rhabdomyosarcoma-to-the-extraocular-eye-muscles
#16
Nicole Hassold, Monika Warmuth-Metz, Beate Winkler, Michael C Kreissl, Karen Ernestus, Meinrad Beer, Henning Neubauer
BACKGROUND: Rhabdomyosarcoma is the most frequent malignant intraorbital tumour in paediatric patients. Differentiation of tumour recurrence or metastases from post-therapeutic signal alteration can be challenging, using standard MR imaging techniques. Diffusion-weighted MRI (DWI) is increasingly considered a helpful supplementary imaging tool for differentiation of orbital masses. CASE PRESENTATION: We report on a 15-year-old female adolescent of Caucasian ethnicity who developed isolated bilateral thickening of extraocular eye muscles about two years after successful multimodal treatment of orbital alveolar rhabdomyosarcoma...
2014: BMC Pediatrics
https://www.readbyqxmd.com/read/24565717/a-58-year-old-man-with-respiratory-insufficiency-after-a-50-year-history-of-hypersensitivity-pneumonitis-and-pulmonary-aspergillus-infections
#17
Florian Segerer, Henner Morbach, Nicole Hassold, Stefan Kleinert, Hans-Peter Tony, Joachim Roesler, Johannes Liese
No abstract text is available yet for this article.
November 2013: Journal of Allergy and Clinical Immunology in Practice
https://www.readbyqxmd.com/read/24497841/variation-in-genome-wide-levels-of-meiotic-recombination-is-established-at-the-onset-of-prophase-in-mammalian-males
#18
Brian Baier, Patricia Hunt, Karl W Broman, Terry Hassold
Segregation of chromosomes during the first meiotic division relies on crossovers established during prophase. Although crossovers are strictly regulated so that at least one occurs per chromosome, individual variation in crossover levels is not uncommon. In an analysis of different inbred strains of male mice, we identified among-strain variation in the number of foci for the crossover-associated protein MLH1. We report studies of strains with "low" (CAST/EiJ), "medium" (C3H/HeJ), and "high" (C57BL/6J) genome-wide MLH1 values to define factors responsible for this variation...
January 2014: PLoS Genetics
https://www.readbyqxmd.com/read/24376867/cytological-studies-of-human-meiosis-sex-specific-differences-in-recombination-originate-at-or-prior-to-establishment-of-double-strand-breaks
#19
Jennifer R Gruhn, Carmen Rubio, Karl W Broman, Patricia A Hunt, Terry Hassold
Meiotic recombination is sexually dimorphic in most mammalian species, including humans, but the basis for the male:female differences remains unclear. In the present study, we used cytological methodology to directly compare recombination levels between human males and females, and to examine possible sex-specific differences in upstream events of double-strand break (DSB) formation and synaptic initiation. Specifically, we utilized the DNA mismatch repair protein MLH1 as a marker of recombination events, the RecA homologue RAD51 as a surrogate for DSBs, and the synaptonemal complex proteins SYCP3 and/or SYCP1 to examine synapsis between homologs...
2013: PloS One
https://www.readbyqxmd.com/read/24318536/evidence-for-paternal-age-related-alterations-in-meiotic-chromosome-dynamics-in-the-mouse
#20
Lisa A Vrooman, So I Nagaoka, Terry J Hassold, Patricia A Hunt
Increasing age in a woman is a well-documented risk factor for meiotic errors, but the effect of paternal age is less clear. Although it is generally agreed that spermatogenesis declines with age, the mechanisms that account for this remain unclear. Because meiosis involves a complex and tightly regulated series of processes that include DNA replication, DNA repair, and cell cycle regulation, we postulated that the effects of age might be evident as an increase in the frequency of meiotic errors. Accordingly, we analyzed spermatogenesis in male mice of different ages, examining meiotic chromosome dynamics in spermatocytes at prophase, at metaphase I, and at metaphase II...
February 2014: Genetics
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