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Vaginal microbiota

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https://www.readbyqxmd.com/read/28095889/evolution-of-gut-microbiota-composition-from-birth-to-24-weeks-in-the-infantmet-cohort
#1
Cian J Hill, Denise B Lynch, Kiera Murphy, Marynka Ulaszewska, Ian B Jeffery, Carol Anne O'Shea, Claire Watkins, Eugene Dempsey, Fulvio Mattivi, Kieran Touhy, R Paul Ross, C Anthony Ryan, Paul W O' Toole, Catherine Stanton
BACKGROUND: The gut is the most extensively studied niche of the human microbiome. The aim of this study was to characterise the initial gut microbiota development of a cohort of breastfed infants (n = 192) from 1 to 24 weeks of age. METHODS: V4-V5 region 16S rRNA amplicon Illumina sequencing and, in parallel, bacteriological culture. The metabolomic profile of infant urine at 4 weeks of age was also examined by LC-MS. RESULTS: Full-term (FT), spontaneous vaginally delivered (SVD) infants' microbiota remained stable at both phylum and genus levels during the 24-week period examined...
January 17, 2017: Microbiome
https://www.readbyqxmd.com/read/28087949/the-vaginal-microbiota-and-urinary-tract-infection
#2
Ann E Stapleton
The vagina is a key anatomical site in the pathogenesis of urinary tract infection (UTI) in women, serving as a potential reservoir for infecting bacteria and a site at which interventions may decrease the risk of UTI. The vaginal microbiota is a dynamic and often critical factor in this pathogenic interplay, because changes in the characteristics of the vaginal microbiota resulting in the loss of normally protective Lactobacillus spp. increase the risk of UTI. These alterations may result from the influence of estrogen deficiency, antimicrobial therapy, contraceptives, or other causes...
December 2016: Microbiology Spectrum
https://www.readbyqxmd.com/read/28052997/human-three-dimensional-endometrial-epithelial-cell-model-to-study-host-interactions-with-vaginal-bacteria-and-neisseria-gonorrhoeae
#3
Paweł Łaniewski, Adriana Gomez, Geoffrey Hire, Magdalene So, Melissa M Herbst-Kralovetz
Colonization of the endometrium by pathogenic bacteria, ascending from the lower female reproductive tract (FRT), is associated with many gynecologic and obstetric health complications. To study these host-microbe interactions in vitro, we developed a human three-dimensional (3-D) endometrial epithelial cell (EEC) model using the HEC-1A cell line and rotating wall vessel (RWV) bioreactor technology. Our model, composed of 3-D EEC aggregates, recapitulates several functional/structural characteristics of human endometrial epithelial tissue including cell differentiation, junctional complexes/desmosomes, microvilli, membrane-associated mucins and Toll-like receptors (TLRs)...
January 4, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28018325/sensitive-quantitative-analysis-of-the-meconium-bacterial-microbiota-in-healthy-term-infants-born-vaginally-or-by-cesarean-section
#4
Ravinder Nagpal, Hirokazu Tsuji, Takuya Takahashi, Kazunari Kawashima, Satoru Nagata, Koji Nomoto, Yuichiro Yamashiro
For decades, babies were thought to be born germ-free, but recent evidences suggest that they are already exposed to various bacteria in utero. However, the data on population levels of such pioneer gut bacteria, particularly in context to birth mode, is sparse. We herein aimed to quantify such bacteria from the meconium of 151 healthy term Japanese infants born vaginally or by C-section. Neonatal first meconium was obtained within 24-48 h of delivery; RNA was extracted and subjected to reverse-transcription-quantitative PCR using specific primers for Clostridium coccoides group, C...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28017660/prevotella-as-a-hub-for-vaginal-microbiota-under-the-influence-of-host-genetics-and-their-association-with-obesity
#5
Jiyeon Si, Hyun Ju You, Junsun Yu, Joohon Sung, GwangPyo Ko
While the vaginal ecosystem is maintained through mutualistic relationships between the host and the vaginal bacteria, the effect of host genetics on the vaginal microbiota has not been well characterized. We examined the heritability of vaginal microbiota and its association with obesity in 542 Korean females, including 222 monozygotic and 56 dizygotic twins. The vaginal microbiota significantly varied depending on host menopausal status and bacterial vaginosis. Lactobacillus and Prevotella, whose relative abundances are strongly associated with bacterial vaginosis, were the most heritable bacteria among the beneficial and potentially pathogenic vaginal microbiota, respectively...
January 11, 2017: Cell Host & Microbe
https://www.readbyqxmd.com/read/28008325/lactobacilli-dominance-and-vaginal-ph-why-is-the-human-vaginal-microbiome-unique
#6
Elizabeth A Miller, DeAnna E Beasley, Robert R Dunn, Elizabeth A Archie
The human vaginal microbiome is dominated by bacteria from the genus Lactobacillus, which create an acidic environment thought to protect women against sexually transmitted pathogens and opportunistic infections. Strikingly, lactobacilli dominance appears to be unique to humans; while the relative abundance of lactobacilli in the human vagina is typically >70%, in other mammals lactobacilli rarely comprise more than 1% of vaginal microbiota. Several hypotheses have been proposed to explain humans' unique vaginal microbiota, including humans' distinct reproductive physiology, high risk of STDs, and high risk of microbial complications linked to pregnancy and birth...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27983477/comparison-of-culture-dependent-and-culture-independent-molecular-methods-for-characterisation-of-vaginal-microflora
#7
Shirali Pandya, Kavitha Ravi, Vijaya Srinivas, Smitha Jadhav, Anisa Khan, Anjali Arun, Lee W Riley, Purnima Madhivanan
To date, molecular methods that circumvent the limitations of traditional culture methods have not been used to describe the vaginal microflora in India. Here, we compared culture and culture-independent molecular methods in characterising the vaginal microbiota in Indian women. Culture methods involved traditional cultivation on Rogosa and sheep-blood agar, whereas culture-independent methods bypassed a culturing step by performing broad-range 16S rDNA PCR on DNA isolated directly from vaginal swabs. A total of 13 women were included in the study, of which five were characterised as healthy, two were BV-intermediate and six were BV-positive according to Nugent scoring...
December 14, 2016: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/27914477/in-vitro-rescue-of-genital-strains-of-chlamydia-trachomatis-from-interferon-%C3%AE-and-tryptophan-depletion-with-indole-positive-but-not-indole-negative-prevotella-spp
#8
Noa Ziklo, Wilhelmina M Huston, Kuong Taing, Mohammad Katouli, Peter Timms
BACKGROUND: The natural course of sexually transmitted infections caused by Chlamydia trachomatis varies between individuals. In addition to parasite and host effects, the vaginal microbiota might play a key role in the outcome of C. trachomatis infections. Interferon-gamma (IFN-γ), known for its anti-chlamydial properties, activates the expression of indoleamine 2,3-dioxygenase (IDO1) in epithelial cells, an enzyme that catabolizes the amino acid L- tryptophan into N-formylkynurenine, depleting the host cell's pool of tryptophan...
December 3, 2016: BMC Microbiology
https://www.readbyqxmd.com/read/27908986/draft-genome-sequence-of-a-urinary-isolate-of-lactobacillus-crispatus
#9
Travis K Price, Majed Shaheen, Laurynas Kalesinskas, Kema Malki, Evann E Hilt, Catherine Putonti, Alan J Wolfe
While Lactobacillus crispatus contributes to the stability of normal vaginal microbiota, its role in urinary health remains unclear. As part of an on-going attempt to characterize the female urinary microbiota, we report the genome sequence of an L. crispatus strain isolated from a woman displaying no lower urinary tract symptoms.
December 1, 2016: Genome Announcements
https://www.readbyqxmd.com/read/27899809/does-vaginal-delivery-mitigate-or-strengthen-the-intergenerational-association-of-overweight-and-obesity-findings-from-the-boston-birth-cohort
#10
N T Mueller, G Mao, W L Bennet, S K Hourigan, M G Dominguez-Bello, L J Appel, X Wang
BACKGROUND/OBJECTIVES: The intergenerational association of obesity may be driven by mother-to-newborn transmission of microbiota at birth. Yet cesarean delivery circumvents newborn acquisition of vaginal microbiota, and has been associated with greater childhood adiposity. Here we examined the independent and joint associations of maternal pre-pregnancy body mass index (BMI; kg m(-2)) and delivery mode with childhood overweight or obesity. SUBJECTS/METHODS: We prospectively followed 1441 racially and ethnically diverse mother-child dyads in the Boston Birth Cohort until age 5 years (range: 2...
December 20, 2016: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/27890610/a-novel-real-time-pcr-assay-for-highly-specific-detection-and-quantification-of-vaginal-lactobacilli
#11
Vladimir V Demkin, Stanislav I Koshechkin, Alexei Slesarev
PCR detection and quantification of vaginal lactobacilli remains problematic because of the high level of genetic heterogeneity and taxonomic complexity within the genus Lactobacillus. The aim of the present study was to identify conserved sequences among the genomes of major species of vaginal lactobacilli that could be used for the development of a PCR-based method for quantitative determination of vaginal microbiota-specific lactobacilli. Comparative analysis of the genomes of several species of vaginal lactobacilli allowed us to identify conserved regions in the rplK gene, which encodes ribosomal protein L11, and to design group-specific PCR primers and a probe for selected species from the L...
November 25, 2016: Molecular and Cellular Probes
https://www.readbyqxmd.com/read/27884820/una-destinatio-viae-diversae-does-exposure-to-the-vaginal-microbiota-confer-health-benefits-to-the-infant-and-does-lack-of-exposure-confer-disease-risk
#12
Kjersti Aagaard, Christopher J Stewart, Derrick Chu
No abstract text is available yet for this article.
December 2016: EMBO Reports
https://www.readbyqxmd.com/read/27884207/potential-contribution-of-the-uterine-microbiome-in-the-development-of-endometrial-cancer
#13
Marina R S Walther-António, Jun Chen, Francesco Multinu, Alexis Hokenstad, Tammy J Distad, E Heidi Cheek, Gary L Keeney, Douglas J Creedon, Heidi Nelson, Andrea Mariani, Nicholas Chia
BACKGROUND: Endometrial cancer studies have led to a number of well-defined but mechanistically unconnected genetic and environmental risk factors. One of the emerging modulators between environmental triggers and genetic expression is the microbiome. We set out to inquire about the composition of the uterine microbiome and its putative role in endometrial cancer. METHODS: We undertook a study of the microbiome in samples taken from different locations along the female reproductive tract in patients with endometrial cancer (n = 17), patients with endometrial hyperplasia (endometrial cancer precursor, n = 4), and patients afflicted with benign uterine conditions (n = 10)...
November 25, 2016: Genome Medicine
https://www.readbyqxmd.com/read/27878718/proinflammatory-cytokines-as-regulators-of-vaginal-microbiota
#14
E A Kremleva, A V Sgibnev
It was shown that IL-1β, IL-8, and IL-6 in concentrations similar to those in the vagina of healthy women stimulated the growth of normal microflora (Lactobacillus spp.) and suppressed the growth and biofilm production by S. aureus and E. coli. On the contrary, these cytokines in higher concentrations typical of vaginal dysbiosis suppressed normal microflora and stimulated the growth of opportunistic microorganisms. TGF-β1 in both doses produced a stimulating effects on study vaginal microsymbionts. It is hypothesized that pro-inflammatory cytokines serve as the molecules of interspecies communication coordinating the interactions of all components of the vaginal symbiotic system...
November 2016: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/27861554/high-diversity-and-variability-in-the-vaginal-microbiome-in-women-following-preterm-premature-rupture-of-membranes-pprom-a-prospective-cohort-study
#15
Teenus Paramel Jayaprakash, Emily C Wagner, Julie van Schalkwyk, Arianne Y K Albert, Janet E Hill, Deborah M Money
OBJECTIVE: To characterize the vaginal microbiota of women following preterm premature rupture of membranes (PPROM), and determine if microbiome composition predicts latency duration and perinatal outcomes. DESIGN: A prospective cohort study. SETTING: Canada. POPULATION: Women with PPROM between 24+0 and 33+6 weeks gestational age (GA). METHODS: Microbiome profiles, based on pyrosequencing of the cpn60 universal target, were generated from vaginal samples at time of presentation with PPROM, weekly thereafter, and at delivery...
2016: PloS One
https://www.readbyqxmd.com/read/27861551/genomes-of-gardnerella-strains-reveal-an-abundance-of-prophages-within-the-bladder-microbiome
#16
Kema Malki, Jason W Shapiro, Travis K Price, Evann E Hilt, Krystal Thomas-White, Trina Sircar, Amy B Rosenfeld, Gina Kuffel, Michael J Zilliox, Alan J Wolfe, Catherine Putonti
Bacterial surveys of the vaginal and bladder human microbiota have revealed an abundance of many similar bacterial taxa. As the bladder was once thought to be sterile, the complex interactions between microbes within the bladder have yet to be characterized. To initiate this process, we have begun sequencing isolates, including the clinically relevant genus Gardnerella. Herein, we present the genomic sequences of four Gardnerella strains isolated from the bladders of women with symptoms of urgency urinary incontinence; these are the first Gardnerella genomes produced from this niche...
2016: PloS One
https://www.readbyqxmd.com/read/27856152/-use-of-probiotics-in-bacterial-vaginosis
#17
A M Mur Pérez, Z Mateo Segura, N Ramírez Domínguez, P Vela Condón
INTRODUCTION: Bacterial vaginosis (BV) is a change in the vaginal microbiota due to bacterial overgrowth of normal microorganisms, which produces symptoms of vaginal discomfort, increased malodorous vaginal discharge, etc. Although they been seen to improve recurrence rates in clinical practice, the role of probiotics is questioned in these situations. A literature review on BV is presented in order to evaluate the effectiveness of using probiotics as adjuvant therapy in BV. METHOD: PubMed, Cochrane and SCOPUS review of the last 5 years publications using probiotics to treat women diagnosed with BV...
November 14, 2016: Semergen
https://www.readbyqxmd.com/read/27853317/high-mannose-specific-lectin-msl-mediates-key-interactions-of-the-vaginal-lactobacillus-plantarum-isolate-cmpg5300
#18
Shweta Malik, Mariya I Petrova, Nicole C E Imholz, Tine L A Verhoeven, Sam Noppen, Els J M Van Damme, Sandra Liekens, Jan Balzarini, Dominique Schols, Jos Vanderleyden, Sarah Lebeer
To characterize the interaction potential of the human vaginal isolate Lactobacillus plantarum CMPG5300, its genome was mined for genes encoding lectin-like proteins. cmpg5300.05_29 was identified as the gene encoding a putative mannose-binding lectin. Phenotypic analysis of a gene knock-out mutant of cmpg5300.05_29 showed that expression of this gene is important for auto-aggregation, adhesion to the vaginal epithelial cells, biofilm formation and binding to mannosylated glycans. Purification of the predicted lectin domain of Cmpg5300...
November 17, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27836494/associations-between-vaginal-infections-and-potential-high-risk-and-high-risk-human-papillomavirus-genotypes-in-female-sex-workers-in-western-kenya
#19
Sonia Menon, Davy Vanden Broeck, Rodolfo Rossi, Emilomo Ogbe, Stacy Harmon, Hillary Mabeya
PURPOSE: Infection with and persistence of high-risk human papillomavirus (HR HPV) are the strongest risk factors for cervical cancer. Little is known about the prevalence and role of concurrent sexually transmitted infections (STIs) found in HPV-infected female sex workers (FSW) in Africa. This study purports to test our a priori hypotheses that STIs are associated with genotypes pertaining to the α-group species 9. The objectives were to determine the prevalence of bacterial vaginosis (BV), Trichomonas vaginalis, and Candida spp in FSW, the association between these STIs and the prevalence of any potential HR and HR HPV genotypes in FSWs...
December 2016: Clinical Therapeutics
https://www.readbyqxmd.com/read/27832763/a-comparison-of-intestinal-microbiota-in-a-population-of-low-risk-infants-exposed-and-not-exposed-to-intrapartum-antibiotics-the-baby-microbiota-of-the-intestine-cohort-study-protocol
#20
Julia Simioni, Eileen K Hutton, Elizabeth Gunn, Alison C Holloway, Jennifer C Stearns, Helen McDonald, Andrea Mousseau, Jonathan D Schertzer, Elyanne M Ratcliffe, Lehana Thabane, Michael G Surette, Katherine M Morrison
BACKGROUND: The intestinal microbiota influences metabolic, nutritional, and immunologic processes and has been associated with a broad range of adverse health outcomes including asthma, obesity and Type 2 diabetes. Early life exposures may alter the course of gut microbial colonization leading to differences in metabolic and immune regulation throughout life. Although approximately 50 % of low-risk full-term infants born in Canada are exposed to intrapartum antibiotics, little is known about the influence of this common prophylactic treatment on the developing neonatal intestinal microbiota...
November 10, 2016: BMC Pediatrics
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