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https://www.readbyqxmd.com/read/28323933/research-resource-transcriptional-dynamics-of-cultured-human-villous-cytotrophoblasts
#1
Joshua F Robinson, Mirhan Kapidzic, Matthew Gormley, Katherine Ona, Terrence Dent, Helia Seifikar, Emily G Hamilton, Susan J Fisher
During human pregnancy, cytotrophoblasts (CTBs) play key roles in uterine invasion, vascular remodeling, and anchoring of the feto-placental unit. Due to the challenges associated with studying human placentation in utero, cultured primary villous CTBs are used as a model of the differentiation pathway that leads to invasion of the uterine wall. In vitro, CTBs emulate in vivo cell behaviors, such as migration, aggregation and substrate penetration. While some of the molecular features related to these cell behaviors have been described, the underlying mechanisms, at a global level, remain undefined at mid-gestation...
March 8, 2017: Endocrinology
https://www.readbyqxmd.com/read/28303276/a-parameterized-ultrasound-based-finite-element-analysis-of-the-mechanical-environment-of-pregnancy
#2
Andrea R Westervelt, Michael Fernandez, Michael House, Joy Vink, Chia-Ling Nhan-Chang, Ronald Wapner, Kristin M Myers
Preterm birth is the leading cause of childhood mortality, and can lead to health risks in survivors. The mechanical function of the uterus, fetal membranes, and cervix have dynamic roles to protect the fetus during gestation. To understand their mechanical function and relation to preterm birth, we built a 3-dimensional parameterized finite element model of pregnancy. This model is generated by an automated procedure that is informed by maternal ultrasound measurements. A baseline model at 25 weeks of gestation was characterized, and to visualize the impact of cervical structural parameters on tissue stretch we evaluated the model sensitivity to: (1) anterior uterocervical angle, (2) cervical length, (3) posterior cervical offset, and (4) cervical stiffness...
March 17, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/28294441/accuracy-of-pre-operative-real-time-dynamic-transvaginal-ultrasound-sliding-sign-in-prediction-of-pelvic-adhesions-in-women-with-previous-abdominopelvic-surgery-a-prospective-multicenter-double-blinded-study
#3
Amira Ayachi, Rim Bouchahda, Sadok Derouich, Lassaad Mkaouer, Mehdi Kehila, Hassine Abouda, Badis Channoufi, Maha Bouyahia, Marouen Braham, Fethi Zhioua, Haifa Bouchahda, Mechaal Mourali
OBJECTIVE: To highlight the role of the transvaginal ultrasound sliding sign in predicting pelvic adhesions in women with a previous history of abdominopelvic surgery. METHODS: Multicenter prospective, interventional, double blinded study. Patients were examined before the laparoscopy or laparotomy, in gynaecological position, with transvaginal ultrasound (TVU) probe to assess vesico uterine pouch, uterus, ovaries, pouch of Douglas by analysing the gliding between two structures...
March 13, 2017: Ultrasound in Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28281300/the-effect-of-anatomical-placental-location-on-the-third-stage-of-labor
#4
Ulaş Fidan, Mustafa Ulubay, Serkan Bodur, Mehmet Ferdi Kıncı, Kazım Emre Karaşahin, Müfit Cemal Yenen
INTRODUCTION: According to the lower uterine segment and trophotropism hypotheses of placental implantation, placentation occurs in uterine segments with a high blood supply. The present study was designed to determine the clinical implications of these hypotheses by assessing the dynamics of the third stage of labor. MATERIALS AND METHODS: Two-hundred and ninety-two prospectively followed pregnant women were assessed at the time of delivery. The uterine locations of the placentas were determined according to the position of the main placental volume and mass under a sagittal view obtained using a centrally-located ultrasonography probe...
March 9, 2017: Clinical Anatomy
https://www.readbyqxmd.com/read/28280497/activation-of-blood-cd3-cd56-cd8-t-cells-during-pregnancy-and-multiple-sclerosis
#5
Clara de Andrés, Lidia Fernández-Paredes, Marta Tejera-Alhambra, Bárbara Alonso, Rocío Ramos-Medina, Silvia Sánchez-Ramón
A striking common feature of most autoimmune diseases is their female predominance, with at least twice as common among women than men in relapsing-remitting multiple sclerosis (MS), the prevailing MS clinical form with onset at childbearing age. This fact, together with the protective effect on disease activity during pregnancy, when there are many biological changes including high levels of estrogens and progesterone, puts sex hormones under the spotlight. The role of natural killer (NK) and NKT cells in MS disease beginning and course is still to be elucidated...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28278173/circulating-progenitor-and-angiogenic-cell-frequencies-are-abnormally-static-over-pregnancy-in-women-with-preconception-diabetes-a-pilot-study
#6
Patricia D A Lima, Zhilin Chen, Aysha Tayab, Malia S Q Murphy, Jessica Pudwell, Graeme N Smith, B Anne Croy
Type 1 and 2 diabetes decrease the frequencies and functional capacities of circulating angiogenic cells (CAC). Diabetes also elevates gestational complications. These observations may be interrelated. We undertook pilot studies to address the hypothesis that preconception diabetes deviates known gestational increases in CACs. Cross-sectional study of type 1 diabetic, type 2 diabetic and normoglycemic pregnant women was conducted at 1st, 2nd, and 3rd trimester and compared to a 6mo postpartum surrogate baseline...
2017: PloS One
https://www.readbyqxmd.com/read/28273332/comparison-between-model-predicted-tumor-oxygenation-dynamics-and-vascular-flow-related-doppler-indices
#7
Antonella Belfatto, Ailyn M Vidal Urbinati, Delia Ciardo, Dorella Franchi, Federica Cattani, Roberta Lazzari, Barbara A Jereczek-Fossa, Roberto Orecchia, Guido Baroni, Pietro Cerveri
PURPOSE: Mathematical modeling is a powerful and flexible method to investigate complex phenomena. It discloses the possibility of reproducing expensive as well as invasive experiments in a safe environment with limited costs. This makes it suitable to mimic tumor evolution and response to radiotherapy although the reliability of the results remains an issue. Complexity reduction is therefore a critical aspect in order to be able to compare model outcomes to clinical data. Among the factors affecting treatment efficacy, tumor oxygenation is known to play a key role in radiotherapy response...
March 8, 2017: Medical Physics
https://www.readbyqxmd.com/read/28256208/mu-opioid-receptor-in-the-human-endometrium-dynamics-of-its-expression-and-localization-during-the-menstrual-cycle
#8
Lide Totorikaguena, Estibaliz Olabarrieta, Roberto Matorras, Edurne Alonso, Ekaitz Agirregoitia, Naiara Agirregoitia
OBJECTIVE: To study the dynamics of the expression and localization of the mu opioid receptor (MOR) in human endometrium throughout the menstrual cycle. DESIGN: Analysis of human endometrial samples from different menstrual cycle phases (menstrual, early/midproliferative, late proliferative/early secretory, midsecretory, and late secretory) by reverse transcription-polymerase chain reaction, Western blot, and immunohistochemistry. SETTING: Academic research laboratory...
February 27, 2017: Fertility and Sterility
https://www.readbyqxmd.com/read/28243063/novel-5-oxo-hexahydroquinoline-derivatives-design-synthesis-in-vitro-p-glycoprotein-mediated-multidrug-resistance-reversal-profile-and-molecular-dynamics-simulation-study
#9
Omolbanin Shahraki, Najmeh Edraki, Mehdi Khoshneviszadeh, Farshid Zargari, Sara Ranjbar, Luciano Saso, Omidreza Firuzi, Ramin Miri
Overexpression of the efflux pump P-glycoprotein (P-gp) is one of the important mechanisms of multidrug resistance (MDR) in many tumor cells. In this study, 26 novel 5-oxo-hexahydroquinoline derivatives containing different nitrophenyl moieties at C4 and various carboxamide substituents at C3 were designed, synthesized and evaluated for their ability to inhibit P-gp by measuring the amount of rhodamine 123 (Rh123) accumulation in uterine sarcoma cells that overexpress P-gp (MES-SA/Dx5) using flow cytometry...
2017: Drug Design, Development and Therapy
https://www.readbyqxmd.com/read/28238320/-oxytocin-administration-during-spontaneous-labour-guidelines-for-clinical-practice-guidelines-short-text
#10
C Dupont, M Carayol, C Le Ray, C Barasinski, R Beranger, A Burguet, A Chantry, C Chiesa, B Coulm, A Evrard, C Fischer, L Gaucher, C Guillou, F Leroy, E Phan, A Rousseau, V Tessier, F Vendittelli, C Deneux-Tharaux, D Riethmuller
OBJECTIVES: To define the different stages of spontaneous labour. To determine the indications, modalities of use and the effects of administering synthetic oxytocin. And to describe undesirable maternal and perinatal outcomes associated with the use of synthetic oxytocin. METHOD: A systematic review was carried out by searching Medline database and websites of obstetrics learned societies until March 2016. RESULTS: The 1st stage of labor is divided in a latence phase and an active phase, which switch at 5cm of cervical dilatation...
January 2017: Gynecol Obstet Fertil Senol
https://www.readbyqxmd.com/read/28211648/cognitive-development-in-preterm-infants-multi-faceted-deficits-reflect-vulnerability-of-rigorous-neurodevelopmental-pathways
#11
Jessie R Maxwell, Tracylyn R Yellowhair, Akosua Y Oppong, Jenny E Camacho, Jean R Lowe, Lauren L Jantzie, Robin K Ohls
Prematurity remains the major cause of neonatal morbidity and mortality, with 15 million preterm births occurring worldwide in 2010. Infants born less than 37 weeks gestation are at high risk of abnormal neurodevelopmental outcomes, given that the central nervous system is extremely sensitive to an abnormal intra- and extra-uterine environment. Children born preterm have multiple neurodevelopmental sequelae involving dynamic and complex cognitive deficits. Former preterm infants have difficulty with each domain of cognition, including executive function, language, learning and memory, complex attention, perceptual-motor function and social cognition when compared to children born at term...
February 17, 2017: Minerva Pediatrica
https://www.readbyqxmd.com/read/28193233/tacrolimus-in-the-prevention-of-adverse-pregnancy-outcomes-and-diabetes-associated-embryopathies-in-obese-and-diabetic-mice
#12
Ahmad J H Albaghdadi, Melanie A Hewitt, Samantha M Putos, Michael Wells, Terence R S Ozolinš, Frederick W K Kan
BACKGROUND: T2DM is a high-risk pregnancy with adverse fetal and maternal outcomes including repeated miscarriages and fetal malformations. Despite the established association between placental insufficiency and poor maternal Th1-adaptability to the development of pregnancy complications in T2DM, there have been no established data to assess benefits of pre-pregnancy immunosuppression relative to gestational outcomes in T2DM. We hypothesized that pre-pregnancy macrolide immune suppression can re-establish normal placental development and uterine vascular adaptation in a mouse model of obesity-associated T2DM...
February 13, 2017: Journal of Translational Medicine
https://www.readbyqxmd.com/read/28190919/heterogeneity-of-tumor-cells-in-terms-of-cancer-initiating-cells
#13
REVIEW
Eiichi Morii
Tumors derive from a single cell clone but consist of heterogeneous cell subpopulations with diverse features and functions. A limited number of subclones with a selective advantage can initiate tumors when inoculated into immunocompromised mice, and are called cancer-initiating cells (CICs). CICs can be isolated from the bulk of tumors on the basis of their characteristics, such as high reagent efflux, degradation of reactive oxygen species, and aldehyde dehydrogenase (ALDH) activity. Under normal conditions, new CICs are produced by existing CICs rather than non-CICs...
January 2017: Journal of Toxicologic Pathology
https://www.readbyqxmd.com/read/28188843/rapid-expression-of-rasd1-is-regulated-by-estrogen-receptor-dependent-intracellular-signaling-pathway-in-the-mouse-uterus
#14
Hye-Ryun Kim, Kil-Sang Cho, Eunhye Kim, Ok-Hee Lee, Hyemin Yoon, Sangho Lee, Sohyeon Moon, Miseon Park, Kwonho Hong, Younghwa Na, Ji-Eun Shin, Hwang Kwon, Haengseok Song, Dong Hee Choi, Youngsok Choi
Dexamethasone-induced RAS-related protein 1 (RASD1) is a signaling protein that is involved in various cellular processes. In a previous study, we found that RASD1 expression was down-regulated in the uterine endometrium of repeated implantation failure patients. The study aim was to determine whether RASD1 is expressed in the endometrium of mouse uterus and how it is regulated by steroid hormones during the estrous cycle. In this study, we investigated RASD1 expression and regulation in an ovariectomized female mouse model...
May 5, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28153658/first-trimester-alcohol-exposure-alters-placental-perfusion-and-fetal-oxygen-availability-affecting-fetal-growth-and-development-in-a-non-human-primate-model
#15
Jamie O Lo, Matthias C Schabel, Victoria H J Roberts, Xiaojie Wang, Katherine S Lewandowski, Kathleen A Grant, Antonio E Frias, Christopher D Kroenke
BACKGROUND: Prenatal alcohol exposure leads to impaired fetal growth, brain development, and stillbirth. Placental impairment likely contributes to these adverse outcomes, but the mechanisms and specific vasoactive effects of alcohol that links altered placental function to impaired fetal development remain areas of active research. OBJECTIVE: Recently, we developed magnetic resonance imaging techniques in nonhuman primates to characterize placental blood oxygenation through measurements of T2* and perfusion using dynamic contrast-enhanced magnetic resonance imaging...
March 2017: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28113360/accurate-cervical-cell-segmentation-from-overlapping-clumps-in-pap-smear-images
#16
Youyi Song, Ee-Leng Tan, Xudong Jiang, Jie-Zhi Cheng, Dong Ni, Siping Chen, Baiying Lei, Tianfu Wang
Accurate segmentation of cervical cells in Pap smear images is an important step in automatic pre-cancer identification in the uterine cervix. One of the major segmentation challenges is overlapping of cytoplasm, which has not been well-addressed in previous studies. To tackle the overlapping issue, this paper proposes a learning-based method with robust shape priors to segment individual cell in Pap smear images to support automatic monitoring of changes in cells, which is a vital prerequisite of early detection of cervical cancer...
September 7, 2016: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28110753/cell-and-tissue-based-models-for-study-of-placental-development
#17
W R Huckle
Decades of research into the molecular mechanisms by which the placenta forms and functions have sought to improve prevention, diagnosis, and management of disorders of this vital tissue. This research has included development of experimental models intended to replicate behavior of the native placenta in both health and disease. Animal models devised in rodents, sheep, cattle, or other domestic animal species have the advantage of being biologically "complete," but all differ to some degree in developmental timing and anatomical details compared to the human, suggesting subtle differences in molecular mechanism...
2017: Progress in Molecular Biology and Translational Science
https://www.readbyqxmd.com/read/28110751/novel-regulators-of-hemodynamics-in-the-pregnant-uterus
#18
N C Clark, C A Pru, J K Pru
The uterus is a highly dynamic organ, undergoing dramatic physiological changes during normal cyclicity and pregnancy. Many of these changes involve remodeling of the uterine vasculature in order to provide oxygen and nutrients to the developing embryo/fetus. Vasculogenesis, angiogenesis, vasodilation/vasoconstriction, and vascular permeability are coordinated by a vast network of autocrine, paracrine, and endocrine-signaling factors that derive from a number of cellular sources at the maternal:fetal interface, as well as from tissue outside the uterus...
2017: Progress in Molecular Biology and Translational Science
https://www.readbyqxmd.com/read/28102332/dynamic-modeling-of-uteroplacental-blood-flow-in-iugr-indicates-vortices-and-elevated-pressure-in-the-intervillous-space-a-pilot-study
#19
Christian J Roth, Eva Haeussner, Tanja Ruebelmann, Franz V Koch, Christoph Schmitz, Hans-Georg Frank, Wolfgang A Wall
Ischemic placental disease is a concept that links intrauterine growth retardation (IUGR) and preeclampsia (PE) back to insufficient remodeling of uterine spiral arteries. The rheological consequences of insufficient remodeling of uterine spiral arteries were hypothesized to mediate the considerably later manifestation of obstetric disease. However, the micro-rheology in the intervillous space (IVS) cannot be examined clinically and rheological animal models of the human IVS do not exist. Thus, an in silico approach was implemented to provide in vivo inaccessible data...
January 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28077439/the-functional-expression-of-transient-receptor-potential-channels-in-the-mouse-endometrium
#20
Katrien De Clercq, Charlotte Van den Eynde, Aurélie Hennes, Rieta Van Bree, Thomas Voets, Joris Vriens
STUDY QUESTION: Does mouse endometrial epithelial cells and stromal cells have a similar transient receptor potential (TRP)-channel expression profile and to that found in the human endometrium? SUMMARY ANSWER: Mouse endometrial epithelial and stromal cells have a distinct TRP channel expression profile analogous to what has been found in human endometrium, and hence suggests the mouse a good model to investigate the role of TRP channels in reproduction. WHAT IS KNOWN ALREADY: An optimal intercellular communication between epithelial and stromal endometrial cells is crucial for successful reproduction...
January 6, 2017: Human Reproduction
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