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Skin microbiome

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https://www.readbyqxmd.com/read/29347966/reprdb-and-pandb-minimalist-databases-with-maximal-microbial-representation
#1
Wei Zhou, Nicole Gay, Julia Oh
BACKGROUND: Profiling of shotgun metagenomic samples is hindered by a lack of unified microbial reference genome databases that (i) assemble genomic information from all open access microbial genomes, (ii) have relatively small sizes, and (iii) are compatible to various metagenomic read mapping tools. Moreover, computational tools to rapidly compile and update such databases to accommodate the rapid increase in new reference genomes do not exist. As a result, database-guided analyses often fail to profile a substantial fraction of metagenomic shotgun sequencing reads from complex microbiomes...
January 18, 2018: Microbiome
https://www.readbyqxmd.com/read/29344612/association-of-disease-severity-with-skin-microbiome-and-filaggrin-gene-mutations-in-adult-atopic-dermatitis
#2
Maja-Lisa Clausen, Tove Agner, Berit Lilje, Sofie M Edslev, Thor Bech Johannesen, Paal Skytt Andersen
Importance: Skin microbiome correlates with disease severity for lesional and nonlesional skin, indicating a global influence of atopic dermatitis (AD). A relation between skin microbiome and filaggrin gene (FLG) mutations proposes a possible association between skin microbiome and host genetics. Objectives: To assess skin and nasal microbiome diversity and composition in patients with AD and compare with healthy controls, and to investigate the microbiome in relation to disease severity and FLG mutations in patients with AD...
January 17, 2018: JAMA Dermatology
https://www.readbyqxmd.com/read/29335027/fungi-stabilize-connectivity-in-the-lung-and-skin-microbial-ecosystems
#3
Laura Tipton, Christian L Müller, Zachary D Kurtz, Laurence Huang, Eric Kleerup, Alison Morris, Richard Bonneau, Elodie Ghedin
BACKGROUND: No microbe exists in isolation, and few live in environments with only members of their own kingdom or domain. As microbiome studies become increasingly more interested in the interactions between microbes than in cataloging which microbes are present, the variety of microbes in the community should be considered. However, the majority of ecological interaction networks for microbiomes built to date have included only bacteria. Joint association inference across multiple domains of life, e...
January 15, 2018: Microbiome
https://www.readbyqxmd.com/read/29332945/the-human-skin-microbiome
#4
REVIEW
Allyson L Byrd, Yasmine Belkaid, Julia A Segre
Functioning as the exterior interface of the human body with the environment, skin acts as a physical barrier to prevent the invasion of foreign pathogens while providing a home to the commensal microbiota. The harsh physical landscape of skin, particularly the desiccated, nutrient-poor, acidic environment, also contributes to the adversity that pathogens face when colonizing human skin. Despite this, the skin is colonized by a diverse microbiota. In this Review, we describe amplicon and shotgun metagenomic DNA sequencing studies that have been used to assess the taxonomic diversity of microorganisms that are associated with skin from the kingdom to the strain level...
January 15, 2018: Nature Reviews. Microbiology
https://www.readbyqxmd.com/read/29318631/early-life-gut-microbiome-and-egg-allergy
#5
Mina Fazlollahi, Yoojin Chun, Alexander Grishin, Robert A Wood, A Wesley Burks, Peter Dawson, Stacie M Jones, Donald Y M Leung, Hugh A Sampson, Scott H Sicherer, Supinda Bunyavanich
BACKGROUND: Gut microbiota may play a role in egg allergy. We sought to examine the association between early-life gut microbiota and egg allergy. METHODS: We studied 141 children with egg allergy and controls from the multi-center Consortium of Food Allergy Research study. At enrollment (age 3 to 16 months), fecal samples were collected and clinical evaluation, egg specific IgE measurement, and egg skin prick test were performed. Gut microbiome was profiled by 16S rRNA sequencing...
January 10, 2018: Allergy
https://www.readbyqxmd.com/read/29316256/immunosuppressive-effect-of-the-gut-microbiome-altered-by-high-dose-tacrolimus-in-mice
#6
Z Zhang, L Liu, H Tang, W Jiao, S Zeng, Y Xu, Q Zhang, Z Sun, A Mukherjee, X Zhang, X Hu
The alterations induced in gut microbiota by tacrolimus may affect immune function and organ transplantation. Mice were treated with a high-dose of tacrolimus for 14 days. The fecal microbiota were analyzed by pyrosequencing the 16S rRNA genes, and the effect on metabolism was predicted using the sequence data. The subgroups of T cells in the serum, gut-associated lymphoid tissue and draining lymph nodes were determined by flow cytometry. Tacrolimus treatment significantly altered the relative abundance of Allobaculum, Bacteroides and Lactobacillus and CD4+ CD25hi FoxP3+ regulatory T-cells in the colonic mucosa and the circulation...
January 9, 2018: American Journal of Transplantation
https://www.readbyqxmd.com/read/29312814/on-revealing-the-gene-targets-of-ebola-virus-micrornas-involved-in-the-human-skin-microbiome
#7
Pei-Chun Hsu, Bin-Hao Chiou, Chun-Ming Huang
Ebola virus, a negative-sense single-stranded RNA virus, causes severe viral hemorrhagic fever and has a high mortality rate. Histopathological and immunopathological analyses of Ebola virus have revealed that histopathological changes in skin tissue are associated with various degrees of endothelial cell swelling and necrosis. The interactions of microbes within or on a host are a crucial for the skin immune shield. The discovery of microRNAs (miRNAs) in Ebola virus implies that immune escape, endothelial cell rupture, and tissue dissolution during Ebola virus infection are a result of the effects of Ebola virus miRNAs...
2018: PeerJ
https://www.readbyqxmd.com/read/29282519/individual-and-species-specific-skin-microbiomes-in-three-different-estrildid-finch-species-revealed-by-16s-amplicon-sequencing
#8
Kathrin Engel, Jan Sauer, Sebastian Jünemann, Anika Winkler, Daniel Wibberg, Jörn Kalinowski, Andreas Tauch, Barbara A Caspers
An animals' body is densely populated with bacteria. Although a large number of investigations on physiological microbial colonisation have emerged in recent years, our understanding of the composition, ecology and function of the microbiota remains incomplete. Here, we investigated whether songbirds have an individual-specific skin microbiome that is similar across different body regions. We collected skin microbe samples from three different bird species (Taeniopygia gutatta, Lonchura striata domestica and Stagonopleura gutatta) at two body locations (neck region, preen gland area)...
December 27, 2017: Microbial Ecology
https://www.readbyqxmd.com/read/29248545/dietary-control-of-skin-lipid-composition-and-microbiome
#9
Kasper S Moestrup, Yun Chen, Troels Schepeler, Pawel J Schweiger, Kim B Jensen
No abstract text is available yet for this article.
December 14, 2017: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/29246799/skin-commensal-malassezia-globosa-secreted-protease-attenuates-staphylococcus-aureus-biofilm-formation
#10
Hao Li, BeeNa Goh, Wooi Keong Teh, Zhenze Jiang, Joleen Pei Zhen Goh, Amelia Goh, Guangxi Wu, Shawn S Hoon, Manfred Raida, Andrea Camattari, Liang Yang, Anthony J O'Donoghue, Thomas L Dawson
Skin provides the first defense against pathogenic microorganisms and is also colonized by a diverse microbiota. Phylogenetic analysis of whole skin microbiome at different skin sites in health and disease has generated important insights on possible microbial involvement in modulating skin health. However, functional roles of the skin microbial community remain unclear. The most common sebaceous skin commensal yeasts are the basidiomycetes, Malassezia. Here, we characterized the dominant secreted Malassezia globosa protease in culture and subsequently named it M...
December 12, 2017: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/29230218/endogenous-antimicrobial-peptide-expression-in-response-to-bacterial-epidermal-colonization
#11
REVIEW
Michael Brandwein, Zvi Bentwich, Doron Steinberg
Bacterial commensal colonization of human skin is vital for the training and maintenance of the skin's innate and adaptive immune functions. In addition to its physical barrier against pathogen colonization, the skin expresses a variety of antimicrobial peptides (AMPs) which are expressed constitutively and induced in response to pathogenic microbial stimuli. These AMPs are differentially effective against a suite of microbial skin colonizers, including both bacterial and fungal residents of the skin. We review the breadth of microorganism-induced cutaneous AMP expression studies and their complementary findings on the efficacy of skin AMPs against different bacterial and fungal species...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29221589/la-peau-un-%C3%A3-cosyst%C3%A3-me-microbien-the-skin-a-microbial-ecosystem
#12
P Lebaron, M Bourrain
Human hosts a large number of microorganisms that constitute its microbiome and the vast majority of them are very useful and even essentials. The human microbiome is a complex ecosystem where live populations of transient or resident microorganisms. The process of co-development or co-adaptation played a major role in the establishment of indigenous communities and help explain the dominance of positive interactions (commensal, symbiotic or mutualistic) in the human-microorganism relationship. The assimilation of nutrients, production of anti-inflammatory compounds, defense against pathogens, vitamin production or stimulating the immune system are some of the key benefits of the indigenous microorganisms...
January 2017: Annales de Dermatologie et de Vénéréologie
https://www.readbyqxmd.com/read/29221585/physiopathologie-de-la-dermatite-atopique-pathophysiology-of-atopic-dermatits
#13
S Barbarot, H Aubert
Atopic dermatitis is a multifactorial disease due to a combination of genetic and environmental factors. The pathophysiological mechanisms involved in AD are multiple: innate functional abnormality in the skin barrier partly linked to mutations of the filaggrin, a major structural protein of the skin; and genes involved in innate and adaptive immunity; Finally, the model of the hygiene theory has been clarified in recent years: environmental factors alter the diversity of skin and digestive microbiomes, and this diversity seems to play a major role in the development of atopy...
January 2017: Annales de Dermatologie et de Vénéréologie
https://www.readbyqxmd.com/read/29214107/diet-and-rosacea-the-role-of-dietary-change-in-the-management-of-rosacea
#14
REVIEW
Emma Weiss, Rajani Katta
Dietary change may play a role in the therapy of rosacea. Certain foods and beverages may act as "triggers" for rosacea exacerbations. These may be divided into heat-related, alcohol-related, capsaicin-related, and cinnamaldehyde-related. One potential pathogenic mechanism may be via the activation of transient receptor potential cation channels, which result in neurogenic vasodilatation. Further research is needed on the role of the gut skin connection in rosacea. Epidemiologic studies suggest that patients with rosacea have a higher prevalence of gastrointestinal disease, and one study reported improvement in rosacea following successful treatment of small intestinal bacterial overgrowth...
October 2017: Dermatology Practical & Conceptual
https://www.readbyqxmd.com/read/29209327/strategies-to-improve-the-efficacy-of-dendritic-cell-based-immunotherapy-for-melanoma
#15
REVIEW
Kristian M Hargadon
Melanoma is a highly aggressive form of skin cancer that frequently metastasizes to vital organs, where it is often difficult to treat with traditional therapies such as surgery and radiation. In such cases of metastatic disease, immunotherapy has emerged in recent years as an exciting treatment option for melanoma patients. Despite unprecedented successes with immune therapy in the clinic, many patients still experience disease relapse, and others fail to respond at all, thus highlighting the need to better understand factors that influence the efficacy of antitumor immune responses...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29203437/effect-of-alcohol-based-hand-rub-on-hand-microbiome-and-hand-skin-health-in-hospitalized-adult-stem-cell-transplant-patients-a-pilot-study
#16
Pranab K Mukherjee, Jyotsna Chandra, Mauricio Retuerto, Karen A Arters, Mary C Consolo, A'ja Patterson, Saralee Bajaksouzian, James W Arbogast, Todd J Cartner, Michael R Jacobs, Mahmoud A Ghannoum, Robert A Salata
No abstract text is available yet for this article.
December 1, 2017: Journal of the American Academy of Dermatology
https://www.readbyqxmd.com/read/29199351/significant-changes-in-the-skin-microbiome-in-patients-with-chronic-plaque-psoriasis-after-treatment-with-narrowband-ultraviolet-b
#17
Malin Assarsson, Albert Duvetorp, Olaf Dienus, Jan Söderman, Oliver Seifert
Changes in the skin microbiome have been shown to promote cutaneous inflammation. The skin microbiome of patients with chronic plaque type psoriasis was analysed before and after treatment with narrowband ultraviolet B (UVB). Swab samples of the microbiome were taken from lesional and non-lesional skin of 26 patients. Microbiotas were characterized by sequencing 16S rRNA bacterial genes on the Illumina MiSeq platform. Lesional skin microbiome diversity correlated with psoriasis severity (measured with the Psoriasis Area and Severity Index; PASI)...
December 4, 2017: Acta Dermato-venereologica
https://www.readbyqxmd.com/read/29193830/effects-of-cosmetics-on-the-skin-microbiome-of-facial-cheeks-with-different-hydration-levels
#18
Hyo Jung Lee, Sang Eun Jeong, Soyoun Lee, Sungwoo Kim, Hyuntak Han, Che Ok Jeon
Basic cosmetics was used by volunteers belonging to high (HHG) and low (LHG) hydration groups for 4 weeks, and bacterial communities and biophysical parameters in facial skin were analyzed. Hydration level increases and transepidermal water loss and roughness decreases were observed in both groups after cosmetic use. Bacterial diversity was greater in LHG than HHG, and increased after cosmetic use in both groups. Bray-Curtis dissimilarities that were higher in LHG than HHG increased in HHG after cosmetic use, whereas they decreased in LHG...
November 29, 2017: MicrobiologyOpen
https://www.readbyqxmd.com/read/29191217/multi-level-comparisons-of-cloacal-skin-feather-and-nest-associated-microbiota-suggest-considerable-influence-of-horizontal-acquisition-on-the-microbiota-assembly-of-sympatric-woodlarks-and-skylarks
#19
H Pieter J van Veelen, Joana Falcao Salles, B Irene Tieleman
BACKGROUND: Working toward a general framework to understand the role of microbiota in animal biology requires the characterisation of animal-associated microbial communities and identification of the evolutionary and ecological factors shaping their variation. In this study, we described the microbiota in the cloaca, brood patch skin and feathers of two species of birds and the microbial communities in their nest environment. We compared patterns of resemblance between these microbial communities at different levels of biological organisation (species, individual, body part) and investigated the phylogenetic structure to deduce potential microbial community assembly processes...
December 1, 2017: Microbiome
https://www.readbyqxmd.com/read/29177119/diversity-of-bacterial-communities-on-the-facial-skin-of-different-age-group-thai-males
#20
Alisa Wilantho, Pamornya Deekaew, Chutika Srisuttiyakorn, Sissades Tongsima, Naraporn Somboonna
Background: Skin microbiome varies from person to person due to a combination of various factors, including age, biogeography, sex, cosmetics and genetics. Many skin disorders appear to be related to the resident microflora, yet databases of facial skin microbiome of many biogeographies, including Thai, are limited. Methods: Metagenomics derived B-RISA and 16S rRNA gene sequencing was utilized to identify the culture-independent bacterial diversity on Thai male faces (cheek and forehead areas)...
2017: PeerJ
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