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Microbiome pregnancy

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https://www.readbyqxmd.com/read/29346438/colonization-of-the-cervicovaginal-space-with-gardnerella-vaginalis-leads-to-local-inflammation-and-cervical-remodeling-in-pregnant-mice
#1
Luz-Jeannette Sierra, Amy G Brown, Guillermo O Barilá, Lauren Anton, Carrie E Barnum, Snehal S Shetye, Louis J Soslowsky, Michal A Elovitz
The role of the cervicovaginal (CV) microbiome in regulating cervical function during pregnancy is poorly understood. Gardnerella vaginalis (G. vaginalis) is the most common bacteria associated with the diagnosis of bacterial vaginosis (BV). While BV has been associated with preterm birth (PTB), clinical trials targeting BV do not decrease PTB rates. It remains unknown if G. vaginalis is capable of triggering molecular, biomechanical and cellular events that could lead to PTB. The objective of this study was to determine if cervicovaginal colonization with G...
2018: PloS One
https://www.readbyqxmd.com/read/29324977/maternal-metabolic-immune-and-microbial-systems-in-late-pregnancy-vary-with-malnutrition-in-mice
#2
Kristin L Connor, Christel Chehoud, Adam Altrichter, Luisa Chan, Todd Z DeSantis, Stephen J Lye
Malnutrition is a global threat to pregnancy health and impacts offspring development. Establishing an optimal pregnancy environment requires the coordination of maternal metabolic and immune pathways, which converge at the gut. Diet, metabolic and immune dysfunctions have been associated with gut dysbiosis in the non-pregnant individual. In pregnancy, these states are associated with poor pregnancy outcomes and offspring development. However, the impact of malnutrition on maternal gut microbes, and their relationships with maternal metabolic and immune status, has been largely underexplored...
January 9, 2018: Biology of Reproduction
https://www.readbyqxmd.com/read/29240761/microorganisms-in-the-human-placenta-are-associated-with-altered-cpg-methylation-of-immune-and-inflammation-related-genes
#3
Martha Scott Tomlinson, Paige A Bommarito, Elizabeth M Martin, Lisa Smeester, Raina N Fichorova, Andrew B Onderdonk, Karl C K Kuban, T Michael O'Shea, Rebecca C Fry
Microorganisms in the placenta have been linked to adverse pregnancy outcomes as well as neonatal illness. Inflammation in the placenta has been identified as a contributing factor in this association, but the underlying biological mechanisms are not yet fully understood. The placental epigenome may serve as an intermediate between placental microbes and inflammation, contributing to adverse outcomes in the offspring. In the present study, genome-wide DNA methylation (n = 486,428 CpG sites) of 84 placentas was analyzed in relation to 16 species of placental microorganisms using samples collected from the Extremely Low Gestation Age Newborns (ELGAN) cohort...
2017: PloS One
https://www.readbyqxmd.com/read/29234108/mother-to-newborn-transmission-of-mycobacterial-l-forms-and-v%C3%AE-2-t-cell-response-in-placentobiome-of-bcg-vaccinated-pregnant-women
#4
T Dimova, A Terzieva, L Djerov, V Dimitrova, A Nikolov, P Grozdanov, N Markova
The ability of bacteria to exist as a population of self-replicating forms with defective or entirely missing cell wall (L-forms) is an adaptive mechanism for their survival and reproduction under unfavorable conditions. Bacterial mother-to-fetus transfer is a universal phenomenon in the animal kingdom. However, data about vertical transfer of L bacterial forms are extremely scarce. Bacille Calmette-Guérin is an attenuated strain of M. bovis and the only licensed vaccine used for tuberculosis prevention. We already have shown that filterable L-forms of BCG exist freely in the vaccine and are able to reproduce and to form colonies...
December 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29221568/nutritional-programming-by-glucocorticoids-in-breast-milk-targets-mechanisms-and-possible-implications
#5
REVIEW
Jonneke J Hollanders, Annemieke C Heijboer, Bibian van der Voorn, Joost Rotteveel, Martijn J J Finken
Vertical transmission of glucocorticoids via breast milk might pose a mechanism through which lactating women could prepare their infants for the postnatal environment. The primary source of breast-milk glucocorticoids is probably the systemic circulation. Research from our group showed that milk cortisol and cortisone concentrations follow the diurnal rhythm of maternal hypothalamus-pituitary-adrenal axis activity, with a higher abundance of cortisone compared to cortisol. Measurement of breast-milk glucocorticoid concentrations is challenging due to possible cross-reactivity with progestagens and sex steroids, which are severely elevated during pregnancy and after parturition...
August 2017: Best Practice & Research. Clinical Endocrinology & Metabolism
https://www.readbyqxmd.com/read/29184093/intrapartum-antibiotics-for-gbs-prophylaxis-alter-colonization-patterns-in-the-early-infant-gut-microbiome-of-low-risk-infants
#6
Jennifer C Stearns, Julia Simioni, Elizabeth Gunn, Helen McDonald, Alison C Holloway, Lehana Thabane, Andrea Mousseau, Jonathan D Schertzer, Elyanne M Ratcliffe, Laura Rossi, Michael G Surette, Katherine M Morrison, Eileen K Hutton
Early life microbial colonization and succession is critically important to healthy development with impacts on metabolic and immunologic processes throughout life. A longitudinal prospective cohort was recruited from midwifery practices to include infants born at full term gestation to women with uncomplicated pregnancies. Here we compare bacterial community succession in infants born vaginally, with no exposure to antibiotics (n = 53), with infants who were exposed to intrapartum antibiotic prophylaxis (IAP) for Group B Streptococcus (GBS; n = 14), and infants born by C-section (n = 7)...
November 28, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29179694/correction-to-protocol-for-the-emory-university-african-american-vaginal-oral-and-gut-microbiome-in-pregnancy-cohort-study
#7
Elizabeth J Corwin, Carol J Hogue, Bradley Pearce, Cherie C Hill, Timothy D Read, Jennifer Mulle, Anne L Dunlop
Following publication of the original article [1], the authors pointed out that the Methods included one step that is no longer necessary but which was inadvertently carried over from an earlier protocol.
November 27, 2017: BMC Pregnancy and Childbirth
https://www.readbyqxmd.com/read/29170495/first-trimester-vaginal-microbiome-diversity-a-potential-indicator-of-preterm-delivery-risk
#8
Mohammed Monzoorul Haque, Mitali Merchant, Pinna Nishal Kumar, Anirban Dutta, Sharmila S Mande
Preterm birth is a leading cause of global neonate mortality. Hospitalization costs associated with preterm deliveries present a huge economic burden. Existing physical/biochemical markers for predicting preterm birth risk are mostly suited for application at mid/late pregnancy stages, thereby leaving very short time (between diagnosis and delivery) for adopting appropriate intervention strategies. Recent studies indicating correlations between pre/full-term delivery and the composition of vaginal microbiota in pregnant women have opened new diagnostic possibilities...
November 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29135334/maternal-high-fat-diet-and-its-consequence-on-the-gut-microbiome-a-rat-model
#9
Phyllis E Mann, Kevin Huynh, Giovanni Widmer
The biological changes that occur during pregnancy in the female mammal include shifts in hormonal regulation in preparation for parturition and lactation, and changes in energy metabolism. In women, studies have also shown that during pregnancy there is a reduction in bacterial species richness in the gut. In the current experiment rats were used to model the interaction of diet, reproductive status, and intestinal bacterial microbiota during pregnancy and lactation. In Experiment 1 rats were exposed to either standard chow or high-fat chow (60%) and were divided into two groups: unmated (NULL) or mated (RE)...
November 14, 2017: Gut Microbes
https://www.readbyqxmd.com/read/29122491/inflammation-and-autism-from-maternal-gut-to-fetal-brain
#10
Ivan Osokine, Adrian Erlebacher
Maternal immune activation (MIA) during pregnancy is associated with an increased risk of behavioral disorders in the offspring of affected mothers. Two recent studies highlight how maternal inflammation disrupts inhibitory interneuron networks and suggest that the maternal gut microbiome may be a contributing risk factor for MIA-induced behavioral abnormalities.
November 6, 2017: Trends in Molecular Medicine
https://www.readbyqxmd.com/read/29077897/in-vivo-oxygen-temperature-and-ph-dynamics-in-the-female-reproductive-tract-and-their-importance-in-human-conception-a-systematic-review
#11
Ka Ying Bonnie Ng, Roel Mingels, Hywel Morgan, Nick Macklon, Ying Cheong
BACKGROUND: Despite advances in ART, implantation and pregnancy rates per embryo transfer still remain low. IVF laboratories strive to ensure that the process of handling gametes in vitro closely mimics the in vivo environment. However, there remains a lack of knowledge regarding the in vivo regulation and dynamic variation in biophysical parameters such as oxygen concentration, pH and temperature within the reproductive tract. OBJECTIVE AND RATIONALE: To undertake a systematic review of the current understanding of the physico-chemical parameters of oxygen tension (pO2), pH and temperature within the female reproductive tract, and their potential implications in clinical and pathological processes related to fertility and those pertaining to limited reproductive capacity...
January 1, 2018: Human Reproduction Update
https://www.readbyqxmd.com/read/29069100/gut-microbiome-of-mothers-delivering-prematurely-shows-reduced-diversity-and-lower-relative-abundance-of-bifidobacterium-and-streptococcus
#12
Cecilie Dahl, Maggie Stanislawski, Nina Iszatt, Siddhartha Mandal, Catherine Lozupone, Jose C Clemente, Rob Knight, Hein Stigum, Merete Eggesbø
OBJECTIVE: Preterm birth is the main reason for neonatal deaths worldwide. We investigate whether maternal gut microbiota may play a previously overlooked role. METHODS: The Norwegian Microbiota Study (NoMIC) is a case control study on preterm birth (<259 days of gestation, calculated primarily based on the last menstrual period), including two consecutively born term infants per infant born prematurely. Eligible mothers were fluent in Norwegian and recruited from the maternity ward at a county hospital in Eastern Norway in the period 2002-2005...
2017: PloS One
https://www.readbyqxmd.com/read/29049068/the-maternal-gut-microbiome-during-pregnancy
#13
(no author information available yet)
No abstract text is available yet for this article.
November 2017: MCN. the American Journal of Maternal Child Nursing
https://www.readbyqxmd.com/read/29042534/the-microbiota-continuum-along-the-female-reproductive-tract-and-its-relation-to-uterine-related-diseases
#14
Chen Chen, Xiaolei Song, Weixia Wei, Huanzi Zhong, Juanjuan Dai, Zhou Lan, Fei Li, Xinlei Yu, Qiang Feng, Zirong Wang, Hailiang Xie, Xiaomin Chen, Chunwei Zeng, Bo Wen, Liping Zeng, Hui Du, Huiru Tang, Changlu Xu, Yan Xia, Huihua Xia, Huanming Yang, Jian Wang, Jun Wang, Lise Madsen, Susanne Brix, Karsten Kristiansen, Xun Xu, Junhua Li, Ruifang Wu, Huijue Jia
Reports on bacteria detected in maternal fluids during pregnancy are typically associated with adverse consequences, and whether the female reproductive tract harbours distinct microbial communities beyond the vagina has been a matter of debate. Here we systematically sample the microbiota within the female reproductive tract in 110 women of reproductive age, and examine the nature of colonisation by 16S rRNA gene amplicon sequencing and cultivation. We find distinct microbial communities in cervical canal, uterus, fallopian tubes and peritoneal fluid, differing from that of the vagina...
October 17, 2017: Nature Communications
https://www.readbyqxmd.com/read/29038841/the-maternal-microbiome-during-pregnancy-and-allergic-disease-in-the-offspring
#15
REVIEW
Peter J Vuillermin, Laurence Macia, Ralph Nanan, Mimi Lk Tang, Fiona Collier, Susanne Brix
There is substantial epidemiological and mechanistic evidence that the increase in allergic disease and asthma in many parts of the world in part relates to changes in microbial exposures and diet acting via the composition and metabolic products of the intestinal microbiome. The majority of research in this field has focused on the gut microbiome during infancy, but it is increasingly clear that the maternal microbiome during pregnancy also has a key role in preventing an allergy-prone immune phenotype in the offspring...
October 16, 2017: Seminars in Immunopathology
https://www.readbyqxmd.com/read/29032226/maternal-depressive-symptoms-linked-to-reduced-fecal-immunoglobulin-a-concentrations-in-infants
#16
Liane J Kang, Petya T Koleva, Catherine J Field, Gerald F Giesbrecht, Eytan Wine, Allan B Becker, Piushkumar J Mandhane, Stuart E Turvey, Padmaja Subbarao, Malcolm R Sears, James A Scott, Anita L Kozyrskyj
Secretory Immunoglobulin A (sIgA) plays a critical role to infant gut mucosal immunity. Delayed IgA production is associated with greater risk of allergic disease. Murine models of stressful events during pregnancy and infancy show alterations in gut immunity and microbial composition in offspring, but little is known about the stress-microbiome-immunity pathways in humans. We investigated differences in infant fecal sIgA concentrations according to the presence of maternal depressive symptoms during and after pregnancy...
October 12, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/29021375/maternal-high-fiber-diet-during-pregnancy-and-lactation-influences-regulatory-t-cell-differentiation-in-offspring-in-mice
#17
Akihito Nakajima, Naoko Kaga, Yumiko Nakanishi, Hiroshi Ohno, Junki Miyamoto, Ikuo Kimura, Shohei Hori, Takashi Sasaki, Keiichi Hiramatsu, Ko Okumura, Sachiko Miyake, Sonoko Habu, Sumio Watanabe
Short-chain fatty acids (SCFAs), the end products of dietary fiber, influence the immune system. Moreover, during pregnancy the maternal microbiome has a great impact on the development of the offspring's immune system. However, the exact mechanisms by which maternal SCFAs during pregnancy and lactation influence the immune system of offspring are not fully understood. We investigated the molecular mechanisms underlying regulatory T cell (Treg) differentiation in offspring regulated by a maternal high fiber diet (HFD)...
October 11, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29020789/-the-role-of-maternal-imunity-and-woman%C3%A2-s-microbiome-in-the-pathogenesis-of-preterm-labor
#18
M Koucký, K Malíčková, J Hrdý, A Černý, H Hrbáčková, P Šimják, A Pařízek
OBJECTIVE: To summarize available data concerning the role of maternal imunity and woman´s microbiome in the pathogenesis of preterm labor and their use in clinical practice. SETTING: Department of Obstetrics and Gynecology od the First Faculty of Medicine, Charles University in Prague, and General Teaching Hospital. DESIGN: Review article. METHODS: Compilation od published data from scientific literature. CONCLUSION: Preterm labor complicates approximately 10% of all pregnancies and represents a serious medical, social and economic problem...
2017: Ceská Gynekologie
https://www.readbyqxmd.com/read/28969463/meconium-microbiome-as-a-new-source-of-information-about-long-term-health-and-disease-questions-and-answers
#19
P Wilczyńska, E Skarżyńska, B Lisowska-Myjak
OBJECTIVE: To assess the diagnostic role of meconium microbiota as a source of information about the intrauterine environment of the developing fetus and possibly health and disease in later life. METHODS: The literature review of over 30 papers published in international journals in the years 2001-2017, on the bacterial composition of meconium and early feces, investigated by metagenomic DNA sequencing in experimental studies on animals and clinical studies in neonates born after normal and pathological pregnancies...
October 2, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28954525/clinical-relevance-of-gastrointestinal-microbiota-during-pregnancy-a-primer-for-nurses
#20
Seon-Yoon Chung, Jacques Ravel, Mary Regan
Emerging evidence about the human microbiome, a collective term for all the microorganisms living in and on the human body, consistently demonstrates the critical influence it has on host physiology and disease risk. The microbiota in the gastrointestinal (GI) tract has the most significant and far-reaching effect on human physiology. The maternal GI microbiota can decrease the risk of adverse pregnancy outcomes by modulating energy extraction, glucose metabolism, vitamin production, and host immunity essential for optimal maternal and neonatal health...
January 1, 2017: Biological Research for Nursing
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