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Microbiome pregnancy

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https://www.readbyqxmd.com/read/29791775/vaginal-microbiome-in-early-pregnancy-and-subsequent-risk-of-spontaneous-preterm-birth-a-case-control-study
#1
Negar Tabatabaei, A Murat Eren, Luis B Barreiro, Vania Yotova, Anne Dumaine, Catherine Allard, William D Fraser
OBJECTIVES: To explore differences in vaginal microbiome between preterm and term deliveries. DESIGN: Nested case-control study in 3D cohort. SETTING: Quebec, Canada. SAMPLE: Ninety-four cases with spontaneous preterm birth (17 early (<34 wk) and 77 late (34-36 wk) preterm birth) and 356 controls with term delivery (≥37 wk). METHODS: To assess vaginal microbiome by sequencing the V4 region of 16S ribosomal-RNA (rRNA) gene in swabs self-collected early pregnancy...
May 23, 2018: BJOG: An International Journal of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/29791773/vaginal-microbiome-studies-in-pregnancy-must-also-analyse-host-factors
#2
S S Witkin
It seems logical that the composition of the vaginal microbiota would be a significant variable influencing pregnancy outcome. Bacteria that are not part of the normal microbiota can trigger induction of myometrial contractions and premature delivery. Components of the endogenous microbiome may also be capable, under conditions still ill-defined, of interfering with pregnancy progression. This article is protected by copyright. All rights reserved.
May 23, 2018: BJOG: An International Journal of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/29789023/iron-supplementation-has-minor-effects-on-gut-microbiota-composition-in-overweight-and-obese-women-in-early-pregnancy
#3
Marloes Dekker Nitert, Luisa F Gomez-Arango, Helen L Barrett, H David McIntyre, Gregory J Anderson, David M Frazer, Leonie K Callaway
Fe is an essential nutrient for many bacteria, and Fe supplementation has been reported to affect the composition of the gut microbiota in both Fe-deficient and Fe-replete individuals outside pregnancy. This study examined whether the dose of Fe in pregnancy multivitamin supplements affects the overall composition of the gut microbiota in overweight and obese pregnant women in early pregnancy. Women participating in the SPRING study with a faecal sample obtained at 16 weeks' gestation were included in this substudy...
May 23, 2018: British Journal of Nutrition
https://www.readbyqxmd.com/read/29776928/enrichment-of-clinically-relevant-organisms-in-spontaneous-preterm-delivered-placenta-and-reagent-contamination-across-all-clinical-groups-in-a-large-uk-pregnancy-cohort
#4
Lydia J Leon, Ronan Doyle, Ernest Diez-Benavente, Taane G Clark, Nigel Klein, Philip Stanier, Gudrun E Moore
In this study differences in the placental microbiota of term and preterm deliveries from a large UK pregnancy cohort were studied using 16S targeted amplicon sequencing. The impact of contamination from DNA extraction, PCR reagents, as well as those from delivery itself were also examined. A total of 400 placental samples from 256 singleton pregnancies were analysed and differences investigated between spontaneous preterm, non-spontaneous preterm, and term delivered placenta. DNA from recently delivered placenta was extracted, and screening for bacterial DNA was carried out using targeted sequencing of the 16S rRNA gene on the Illumina MiSeq platform...
May 18, 2018: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29753695/the-microbiome-in-preterm-birth
#5
REVIEW
Derrick M Chu, Maxim Seferovic, Ryan M Pace, Kjersti M Aagaard
The microbiome is thought to play a role in the maintenance of a healthy pregnancy and thus may either contribute to or protect from preterm birth. Study of the human microbiome has been aided by metagenomic sequencing approaches, providing greater insight into the commensal bacteria that coexist in and on our bodies. The vaginal microbiome has been the most widely studied, though there have been recent efforts to explore the gut, cervical-vaginal, placental and oral microbiomes in the further search of etiologies of preterm birth...
April 9, 2018: Best Practice & Research. Clinical Obstetrics & Gynaecology
https://www.readbyqxmd.com/read/29748817/the-role-of-the-microbiome-for-human-health-from-basic-science-to-clinical-applications
#6
M Hasan Mohajeri, Robert J M Brummer, Robert A Rastall, Rinse K Weersma, Hermie J M Harmsen, Marijke Faas, Manfred Eggersdorfer
The 2017 annual symposium organized by the University Medical Center Groningen in The Netherlands focused on the role of the gut microbiome in human health and disease. Experts from academia and industry examined interactions of prebiotics, probiotics, or vitamins with the gut microbiome in health and disease, the development of the microbiome in early-life and the role of the microbiome on the gut-brain axis. The gut microbiota changes dramatically during pregnancy and intrinsic factors (such as stress), in addition to extrinsic factors (such as diet, and drugs) influence the composition and activity of the gut microbiome throughout life...
May 10, 2018: European Journal of Nutrition
https://www.readbyqxmd.com/read/29747892/relationships-between-perinatal-interventions-maternal-infant-microbiomes-and-neonatal-outcomes
#7
REVIEW
Gregory Valentine, Derrick M Chu, Christopher J Stewart, Kjersti M Aagaard
The human microbiome acquires its vastness and diversity over a relatively short time period during development. Much is unknown, however, about the precise prenatal versus postnatal timing or its sources and determinants. Given early evidence of a role for influences during pregnancy and early neonatal and infant life on the microbiome and subsequent metabolic health, research investigating the development and shaping of the microbiome in the fetus and neonate is an important arena for study. This article reviews the relevant available literature and future questions on what shapes the microbiome during early development and mechanisms for doing so...
June 2018: Clinics in Perinatology
https://www.readbyqxmd.com/read/29738749/the-vaginal-eukaryotic-dna-virome-and-preterm-birth
#8
Kristine M Wylie, Todd N Wylie, Alison G Cahill, George A Macones, Methodius G Tuuli, Molly J Stout
BACKGROUND: Despite decades of attempts to link infectious agents to preterm birth, an exact causative microbe or community of microbes remains elusive. Culture-independent sequencing of vaginal bacterial communities demonstrates community characteristics are associated with preterm birth, although none are specific enough to apply clinically. Viruses are important components of the vaginal microbiome and have dynamic relationships with vaginal bacterial communities. We hypothesized that vaginal eukaryotic DNA viral communities (the "vaginal virome") either alone or in the context of bacterial communities are associated with preterm birth...
May 5, 2018: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/29679625/nutrition-therapy-within-and-beyond-gestational-diabetes
#9
REVIEW
Teri L Hernandez, Archana Mande, Linda A Barbour
With the global rising prevalence of gestational diabetes (GDM), an adaptable, economical approach to nutrition therapy that effectively controls maternal glycemia while promoting normal fetal growth will have far-reaching implications. The conventional focus has been to rigidly limit all types of carbohydrate. While controlling glucose, this approach fosters maternal anxiety and is a primary barrier to adherence. Many mothers substitute fat for carbohydrate, which may unintentionally enhance lipolysis, promote elevated free fatty acids (FFA), and worsen maternal insulin resistance (IR)...
April 18, 2018: Diabetes Research and Clinical Practice
https://www.readbyqxmd.com/read/29668899/how-uterine-microbiota-might-be-responsible-for-a-receptive-fertile-endometrium
#10
Marilen Benner, Gerben Ferwerda, Irma Joosten, Renate G van der Molen
BACKGROUND: Fertility depends on a receptive state of the endometrium, influenced by hormonal and anatomical adaptations, as well as the immune system. Local and systemic immunity is greatly influenced by microbiota. Recent discoveries of 16S rRNA in the endometrium and the ability to detect low-biomass microbiota fueled the notion that the uterus may be indeed a non-sterile compartment. To date, the concept of the 'sterile womb' focuses on in utero effects of microbiota on offspring and neonatal immunity...
April 16, 2018: Human Reproduction Update
https://www.readbyqxmd.com/read/29573218/understanding-environmental-contributions-to-autism-causal-concepts-and-the-state-of-science
#11
REVIEW
Irva Hertz-Picciotto, Rebecca J Schmidt, Paula Krakowiak
The complexity of neurodevelopment, the rapidity of early neurogenesis, and over 100 years of research identifying environmental influences on neurodevelopment serve as backdrop to understanding factors that influence risk and severity of autism spectrum disorder (ASD). This Keynote Lecture, delivered at the May 2016 annual meeting of the International Society for Autism Research, describes concepts of causation, outlines the trajectory of research on nongenetic factors beginning in the 1960s, and briefly reviews the current state of this science...
March 23, 2018: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/29538354/maternal-influence-on-the-fetal-microbiome-in-a-population-based-study-of-the-first-pass-meconium
#12
Terhi Tapiainen, Niko Paalanne, Mysore V Tejesvi, Pirjo Koivusaari, Katja Korpela, Tytti Pokka, Jarmo Salo, Tuula Kaukola, Anna Maria Pirttilä, Matti Uhari, Marjo Renko
BackgroundMeconium is formed before birth and may reflect the microbiome of the fetus. To test our hypothesis, we investigated whether maternal factors during pregnancy, such as biodiversity of the living environment, influence the microbiome of the first stool more than immediate perinatal factors.MethodsWe recruited 218 consecutive newborn infants from one hospital. Regions of the bacterial 16S rRNA gene were sequenced to characterize the microbiomes of the first-pass meconium samples (N=212). We used a multivariate model to determine both the prenatal and perinatal factors affecting the microbiome...
May 2, 2018: Pediatric Research
https://www.readbyqxmd.com/read/29514828/physiological-regulation-of-drug-metabolism-and-transport-pregnancy-microbiome-inflammation-infection-and-fasting
#13
Edward T Morgan, Joseph L Dempsey, Sylvie M Mimche, Tracey J Lamb, Supriya Kulkarni, Julia Yue Cui, Hyunyoung Jeong, Angela L Slitt
This article is a report on a symposium entitled "Physiological Regulation of Drug Metabolism and Transport" sponsored by the American Society for Pharmacology and Experimental Therapeutics and held at the Experimental Biology 2017 meeting in Chicago, IL. The contributions of physiologic and pathophysiological regulation of drug-metabolizing enzymes and transporters to interindividual variability in drug metabolism are increasingly recognized but in many cases are not well understood. The presentations herein discuss the phenomenology, consequences, and mechanism of such regulation...
May 2018: Drug Metabolism and Disposition: the Biological Fate of Chemicals
https://www.readbyqxmd.com/read/29506550/early-life-triclosan-exposure-and-child-adiposity-at-8-years-of-age-a-prospective-cohort-study
#14
Geetika Kalloo, Antonia M Calafat, Aimin Chen, Kimberly Yolton, Bruce P Lanphear, Joseph M Braun
BACKGROUND: Triclosan is an antimicrobial agent that may affect the gut microbiome and endocrine system to influence adiposity. However, little data from prospective studies examining prenatal and childhood exposures exist. We investigated the relationship between multiple, prospective early life measure of triclosan exposure and child adiposity.  METHODS: In a prospective cohort of 220 mother-child pairs from Cincinnati, OH (enrolled 2003-2006), we quantified triclosan in urine samples collected twice during pregnancy, annually from 1 to 5 years of age, and once at 8 years...
March 5, 2018: Environmental Health: a Global Access Science Source
https://www.readbyqxmd.com/read/29447847/perinatal-selective-serotonin-reuptake-inhibitor-ssri-effects-on-body-weight-at-birth-and-beyond-a-review-of-animal-and-human-studies
#15
REVIEW
Sarah M Hutchison, Louise C Mâsse, Jodi L Pawluski, Tim F Oberlander
The long-term impact of selective serotonin reuptake inhibitor (SSRI) antidepressant treatment during pregnancy and postpartum on offspring outcomes is still not clear. Specifically, perinatal SSRI exposure may have long-term consequences for body weight and related health outcomes in the newborn period and beyond. This review focuses on the impact of perinatal SSRI exposure on weight using human and animal findings. The impact of maternal mood is also explored. We propose potential mechanisms for weight changes, including how early alterations in serotonin signaling may have implications for weight via changes in metabolism and motor development...
April 2018: Reproductive Toxicology
https://www.readbyqxmd.com/read/29415232/maternal-antibiotic-exposure-during-pregnancy-and-hospitalization-with-infection-in-offspring-a-population-based-cohort-study
#16
Jessica Eden Miller, Chunsen Wu, Lars Henning Pedersen, Nicholas de Klerk, Jørn Olsen, David P Burgner
Background: The early life microbiome contributes to immune development. Antibiotics during pregnancy alter the microbiome and may influence disease risks in the offspring. We investigated the relationship between maternal antibiotic exposure before and during pregnancy, and risk of childhood hospitalization with infection. Methods: We used population-based Danish national databases for pregnancies between 1995 and 2009. Infants were followed from birth until their first infection-related hospitalization, death, 14th birthday, emigration or end-2009...
April 1, 2018: International Journal of Epidemiology
https://www.readbyqxmd.com/read/29369067/evidence-establishing-a-link-between-prenatal-and-early-life-stress-and-asthma-development
#17
Maria José Rosa, Alison G Lee, Rosalind J Wright
PURPOSE OF REVIEW: The objective of this review is to provide an update on our evolving understanding of the effects of stress in pregnancy and during early development on the onset of asthma-related phenotypes across childhood, adolescence, and into early adulthood. RECENT FINDINGS: Accumulating evidence over the past 2 decades has established that prenatal and early-life psychological stress and stress correlates (e.g., maternal anxiety or depression) increase the risk for childhood respiratory disorders...
January 23, 2018: Current Opinion in Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29364944/associations-between-sexual-habits-menstrual-hygiene-practices-demographics-and-the-vaginal-microbiome-as-revealed-by-bayesian-network-analysis
#18
Noelle Noyes, Kyu-Chul Cho, Jacques Ravel, Larry J Forney, Zaid Abdo
The vaginal microbiome plays an influential role in several disease states in reproductive age women, including bacterial vaginosis (BV). While demographic characteristics are associated with differences in vaginal microbiome community structure, little is known about the influence of sexual and hygiene habits. Furthermore, associations between the vaginal microbiome and risk symptoms of bacterial vaginosis have not been fully elucidated. Using Bayesian network (BN) analysis of 16S rRNA gene sequence results, demographic and extensive questionnaire data, we describe both novel and previously documented associations between habits of women and their vaginal microbiome...
2018: PloS One
https://www.readbyqxmd.com/read/29346438/colonization-of-the-cervicovaginal-space-with-gardnerella-vaginalis-leads-to-local-inflammation-and-cervical-remodeling-in-pregnant-mice
#19
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
#20
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
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