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the male role in pregnancy loss

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https://www.readbyqxmd.com/read/27527110/partitioning-the-variance-in-calorie-restriction-induced-weight-and-fat-loss-in-outbred-mice
#1
Lobke M Vaanholt, Jeffrey E Lane, Bethany Garner, John R Speakman
OBJECTIVE: An increased understanding of the factors influencing interindividual variation in calorie restriction (CR)-induced weight loss is necessary to combat the current obesity epidemic. This study investigated the partitioning of the phenotypic variation in CR-induced wight loss. METHODS: Two generations of male and female outbred MF1 mice raised by their biological mother or a foster mother were studied. Mice were exposed to 4 weeks of 30% CR when 6 months old...
October 2016: Obesity
https://www.readbyqxmd.com/read/27219894/the-importance-of-being-a-regulatory-t-cell-in-pregnancy
#2
REVIEW
David A Clark
Natural Foxp3(+) regulatory T cells (nTregs) defined by expression of the Foxp3 marker generated in the thymus against self autoantigens prevent systemic autoimmune and inflammatory disease. A second population of Tregs induced by exogenous antigens in the periphery (iTregs) are currently thought to play a key role in preventing infertility, recurrent pregnancy loss (occult and clinically-evident), pre-eclampsia, fetal growth restriction, and premature birth in outbred matings where the father is histoincompatible with the mother...
August 2016: Journal of Reproductive Immunology
https://www.readbyqxmd.com/read/27052498/diet-induced-obesity-impairs-endometrial-stromal-cell-decidualization-a-potential-role-for-impaired-autophagy
#3
Julie S Rhee, Jessica L Saben, Allyson L Mayer, Maureen B Schulte, Zeenat Asghar, Claire Stephens, Maggie M-Y Chi, Kelle H Moley
STUDY QUESTION: What effect does diet-induced obesity have on endometrial stromal cell (ESC) decidualization? SUMMARY ANSWER: Diet-induced obesity impairs ESC decidualization. WHAT IS KNOWN ALREADY: Decidualization is important for successful implantation and subsequent health of the pregnancy. Compared with normal-weight women, obese women have lower pregnancy rates (both spontaneous and by assisted reproductive technology), higher rates of early pregnancy loss and poorer oocyte quality...
June 2016: Human Reproduction
https://www.readbyqxmd.com/read/27000843/the-portrayal-of-infant-feeding-in-british-women-s-magazines-a-qualitative-and-quantitative-content-analysis
#4
E O'Brien, P Myles, C Pritchard
BACKGROUND: Exclusive breastfeeding is the best start an infant can receive. However, in many high-income countries breastfeeding rates are low and this may be a reflection of social norms which in turn may be influenced by the media. This study therefore explored the portrayal of infant feeding in women's general interest magazines. METHODS: The five top selling women's weekly magazines in Britain and Ireland for 2013 over a 4-month period were included. A quantitative and qualitative content analysis was conducted for both written and visual content...
March 21, 2016: Journal of Public Health
https://www.readbyqxmd.com/read/26840522/excessive-apoptosis-and-defective-autophagy-contribute-to-developmental-testicular-toxicity-induced-by-fluoride
#5
Shun Zhang, Qiang Niu, Hui Gao, Rulin Ma, Rongrong Lei, Cheng Zhang, Tao Xia, Pei Li, Chunyan Xu, Chao Wang, Jingwen Chen, Lixing Dong, Qian Zhao, Aiguo Wang
Fluoride, a ubiquitous environmental contaminant, is known to impair testicular functions and fertility; however the underlying mechanisms remain obscure. In this study, we used a rat model to mimic human exposure and sought to investigate the roles of apoptosis and autophagy in testicular toxicity of fluoride. Sprague-Dawley rats were developmentally exposed to 25, 50, or 100 mg/L sodium fluoride (NaF) via drinking water from pre-pregnancy to post-puberty, and then the testes of offspring were excised on postnatal day 56...
May 2016: Environmental Pollution
https://www.readbyqxmd.com/read/26662410/genetic-screening-and-evaluation-for-chromosomal-abnormalities-of-infertile-males-in-jilin-province-china
#6
M Zhang, H-T Fan, Q-S Zhang, X-Y Wang, X Yang, W-J Tian, R-W Li
Chromosomal abnormality is the most common genetic cause of male infertility, particularly in cases of azoospermia, oligozoospermia, and recurrent spontaneous abortion. Chromosomal rearrangement may interrupt an important gene or exert position effects. The functionality of genes at specific breakpoints, perhaps with a specific role in spermatogenesis, may be altered by such rearrangements. Structural chromosome abnormalities are furthermore known to increase the risk of pregnancy loss. In this study, we aimed to assess chromosomal defects in infertile men from Jilin Province, China, by genetic screening and to evaluate the relationship between structural chromosome abnormalities and male infertility...
2015: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/26607021/sperm-deoxyribonucleic-acid-fragmentation-assessment-in-normozoospermic-male-partners-of-couples-with-unexplained-recurrent-pregnancy-loss-a-prospective-study
#7
Gihan M Bareh, Ethan Jacoby, Peter Binkley, Tien-Cheng Arthur Chang, Robert S Schenken, Randal D Robinson
OBJECTIVE: To determine whether sperm DNA integrity in normozoospermic male partners plays a role in idiopathic recurrent pregnancy loss (RPL). DESIGN: Prospective, cohort study. SETTING: Academic tertiary care center. PATIENT(S): Group I: 26 male partners of women with unexplained RPL. Group II: 31 normozoospermic males with proven fertility. INTERVENTION(S): Semen samples were collected by masturbation after 48-72 hours of abstinence...
February 2016: Fertility and Sterility
https://www.readbyqxmd.com/read/26538859/microdeletion-of-y-chromosome-as-a-cause-of-recurrent-pregnancy-loss
#8
Shubhra Agarwal, Arjit Agarwal, Anuradha Khanna, Kiran Singh
CONTEXT: In majority of couples experiencing recurrent pregnancy loss (RPL), etiology is still unknown. Two genetic factors have been suggested to underlie miscarriage in a subset of patients, namely skewed X chromosome inactivation in females and Y chromosome microdeletions in their partners. In males, microdeletions of the Y chromosome are known to cause spermatogenetic failure and male infertility. AIMS: The aim of the study was to find out the role of Y chromosome microdeletion in male partners of couples experiencing RPL...
July 2015: Journal of Human Reproductive Sciences
https://www.readbyqxmd.com/read/26460397/preface-the-male-role-in-pregnancy-loss
#9
Richard Bronson
No abstract text is available yet for this article.
2015: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/26375555/structured-teaching-of-early-pregnancy-loss-counseling
#10
Emily K Marko, Samantha D Buery-Joyner, Michael J Sheridan, Kelsey Nieves, Alfred N Khoury, John L Dalrymple
OBJECTIVE: To estimate whether a novel structured curriculum could significantly improve medical student performance in early pregnancy loss counseling. BACKGROUND: Medical students receive limited exposure to early pregnancy loss counseling through real-life observation of this important skill. METHODS: A pre-post control group design was used to examine early pregnancy loss counseling performance among medical students from two medical schools doing their obstetrics and gynecology rotations at the same community hospital...
October 2015: Obstetrics and Gynecology
https://www.readbyqxmd.com/read/26028409/apoptosis-and-cell-proliferation-in-the-mouse-model-of-embryonic-death-induced-by-tritrichomonas-foetus-infection
#11
Mariana A Woudwyk, Carolina N Zanuzzi, Fabián Nishida, Eduardo J Gimeno, Pedro Soto, Cristina E Monteavaro, Claudio G Barbeito
Bovine tritrichomonosis is a sexually transmitted disease caused by the protozoon Tritrichomonas foetus and characterised by embryonic-death and abortion. During pregnancy, the processes of cell proliferation and death play a crucial role for blastocyst implantation and the subsequent maintenance of early pregnancy, and their misbalance may lead to the abortion. In this study, we aimed to investigate whether cell proliferation and death may be altered during tritrichomonosis. For this purpose, we used pregnant BALB/c mice as an alternative experimental animal model that has successfully reproduced the infection...
September 2015: Experimental Parasitology
https://www.readbyqxmd.com/read/26001875/the-management-of-uterine-fibroids-in-women-with-otherwise-unexplained-infertility
#12
Belina Carranza-Mamane, Jon Havelock, Robert Hemmings, Anthony Cheung, Sony Sierra, Belina Carranza-Mamane, Allison Case, Cathie Dwyer, James Graham, Jon Havelock, Robert Hemmings, Kimberly Liu, Ward Murdock, Tannys Vause, Benjamin Wong, Margaret Burnett
OBJECTIVE: To provide recommendations regarding the best management of fibroids in couples who present with infertility. Usual and novel treatment options for fibroids will be reviewed with emphasis on their applicability in women who wish to conceive. OPTIONS: Management of fibroids in women wishing to conceive first involves documentation of the presence of the fibroid and determination of likelihood of the fibroid impacting on the ability to conceive. Treatment of fibroids in this instance is primarily surgical, but must be weighed against the evidence of surgical management improving clinical outcomes, and risks specific to surgical management and approach...
March 2015: Journal of Obstetrics and Gynaecology Canada: JOGC, Journal D'obstétrique et Gynécologie du Canada: JOGC
https://www.readbyqxmd.com/read/25991034/umbilical-cord-blood-plasma-contains-soluble-nkg2d-ligands-that-mediate-loss-of-natural-killer-cell-function-and-cytotoxicity
#13
Steven T Cox, Raquel Laza-Briviesca, Hayley Pearson, Bernat Soria, Daniel Gibson, Susana Gomez, J Alejandro Madrigal, Aurore Saudemont
NK cells play a key role in innate elimination of virally infected or neoplastic cells but they can be circumvented by immunoevasive mechanisms enabling viral spread or tumor progression. Engagement of the NKG2D activating receptor with soluble forms of its ligand is one such mechanism of inducing NK cell hyporesponsiveness. Interestingly, this immunoevasive strategy among others is described at the maternal-fetal interface where tolerance of the semi-allogeneic fetus is required to allow successful human pregnancy...
August 2015: European Journal of Immunology
https://www.readbyqxmd.com/read/25869617/effect-of-estrogen-receptor-subtype-specific-ligands-on-fertility-in-adult-male-rats
#14
COMPARATIVE STUDY
Kushaan Dumasia, Anita Kumar, Leena Kadam, N H Balasinor
Maintenance of normal male fertility relies on the process of spermatogenesis which is under complex endocrine control by mechanisms involving gonadotropin and steroid hormones. Although testosterone is the primary sex steroid in males, estrogen is locally produced in the testis and plays a very crucial role in male fertility. This is evident from presence of both the estrogen receptors alpha (ERα) and beta (ERβ) in the testis and their absence, as in the case of knockout mice models, leads to sterility. The present study was undertaken to understand individual roles of the two ERs in spermatogenesis and their direct contribution towards the maintenance of male fertility using receptor-subtype-specific ligands...
June 2015: Journal of Endocrinology
https://www.readbyqxmd.com/read/25859044/common-variants-spanning-plk4-are-associated-with-mitotic-origin-aneuploidy-in-human-embryos
#15
Rajiv C McCoy, Zachary Demko, Allison Ryan, Milena Banjevic, Matthew Hill, Styrmir Sigurjonsson, Matthew Rabinowitz, Hunter B Fraser, Dmitri A Petrov
Aneuploidy, the inheritance of an atypical chromosome complement, is common in early human development and is the primary cause of pregnancy loss. By screening day-3 embryos during in vitro fertilization cycles, we identified an association between aneuploidy of putative mitotic origin and linked genetic variants on chromosome 4 of maternal genomes. This associated region contains a candidate gene, Polo-like kinase 4 (PLK4), that plays a well-characterized role in centriole duplication and has the ability to alter mitotic fidelity upon minor dysregulation...
April 10, 2015: Science
https://www.readbyqxmd.com/read/25858881/maternal-low-protein-diet-causes-body-weight-loss-in-male-neonate-sprague-dawley-rats-involving-ucp-1-mediated-thermogenesis
#16
Kate J Claycombe, Emilie E Vomhof-DeKrey, James N Roemmich, Turk Rhen, Othman Ghribi
Brown adipose tissue (BAT) plays an important role in regulating body weight (BW) by modifying thermogenesis. Maternal low protein (LP) diets reduce offspring birth weight. Increased BAT thermogenesis in utero may be one mechanism for the lower BW. However, whether maternal LP nutrition alters BAT thermogenesis and BW of offspring in utero is not yet known. We fed obese-prone Sprague-Dawley dams 8% LP or 20% normal protein (NP) diets for 3 weeks prior to breeding and through pregnancy. BW and gene expression of interscapular BAT (iBAT) thermogenic markers were measured in male fetal (gestation day 18) and neonatal (day 0 or 1) offspring...
July 2015: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/25829992/hyperhomocysteinemia-and-mthfr-polymorphisms-as-antenatal-risk-factors-of-white-matter-abnormalities-in-two-cohorts-of-late-preterm-and-full-term-newborns
#17
Lucia M Marseglia, Antonio Nicotera, Vincenzo Salpietro, Elisa Giaimo, Giovanna Cardile, Maria Bonsignore, Angela Alibrandi, Daniela Caccamo, Sara Manti, Gabriella D'Angelo, Carmelo Mamì, Gabriella Di Rosa
Higher total homocysteine (tHcy) levels, and C677T and A1298C methylenetetrahydrofolate (MTHFR) polymorphisms, have been reported in preterm or full term newborns with neonatal encephalopathy following perinatal hypoxic-ischemic insult. This study investigated the causal role of tHcy and MTHFR polymorphisms together with other acquired risk factors on the occurrence of brain white matter abnormalities (WMA) detected by cranial ultrasound scans (cUS) in a population of late preterm and full term infants. A total of 171 newborns (81 M, 47...
2015: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/25810472/protein-arginine-methyltransferase-5-prmt5-is-required-for-germ-cell-survival-during-mouse-embryonic-development
#18
Yanbo Wang, Qiuling Li, Chunyi Liu, Feng Han, Min Chen, Lianjun Zhang, Xiuhong Cui, Yan Qin, Shilai Bao, Fei Gao
In mammals, germ cells undergo massive epigenetic remodeling during fetal development. However, the physiological functions of epigenetic modification in germ cell development remain unclear. In this study, we found that protein arginine methyltransferase 5 (Prmt5) was abundantly expressed in the germ cells of both male and female gonads. Deletion of Prmt5 by crossing with Tnap-Cre mice resulted in germ cell depletion in adult mice. Germ cell loss was first observed between Embryonic Days 12.5 and 13.5 (E12...
April 2015: Biology of Reproduction
https://www.readbyqxmd.com/read/25792016/the-exposure-to-trichilia-catigua-catuaba-crude-extract-impairs-fertility-of-adult-female-rats-but-does-not-cause-reproductive-damage-to-male-offspring
#19
Alice Hartmann Dos Santos, Aline Camargo Ramos, Kennia Moura Silveira, Ana Carolina Inhasz Kiss, Renata Longhini, Andréa Diniz, João Carlos Palazzo de Mello, Daniela Cristina Ceccatto Gerardin
ETHNOPHARMACOLOGICAL RELEVANCE: Trichilia catigua is broadly used in folk medicine due to its mental and physical tonic activities and stimulant effects. In animal models, its antidepressant-like effects have been associated with the dopaminergic (DA) system modulation, which has an important role on maternal behavior and male offspring reproductive development. AIM OF THE STUDY: Since little is known about the adverse effects of the exposure to T. catigua crude extract (CAT) in rats, specially regarding maternal homeostasis and offspring development, the aim of the present study was to evaluate whether CAT exposure may influence maternal toxicity parameters and behavior or disrupt male offspring physical and reproductive development...
May 26, 2015: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/25756805/early-life-lead-exposure-recapitulates-the-selective-loss-of-parvalbumin-positive-gabaergic-interneurons-and-subcortical-dopamine-system-hyperactivity-present-in-schizophrenia
#20
K H Stansfield, K N Ruby, B D Soares, J L McGlothan, X Liu, T R Guilarte
Environmental factors have been associated with psychiatric disorders and recent epidemiological studies suggest an association between prenatal lead (Pb(2+)) exposure and schizophrenia (SZ). Pb(2+) is a potent antagonist of the N-methyl-D-aspartate receptor (NMDAR) and converging evidence indicates that NMDAR hypofunction has a key role in the pathophysiology of SZ. The glutamatergic hypothesis of SZ posits that NMDAR hypofunction results in the loss of parvalbumin (PV)-positive GABAergic interneurons (PVGI) in the brain...
2015: Translational Psychiatry
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