Human microbiota associated-rodent models

I came across brilliant review by Jens Walter et al. that resonates with my thoughts in microbiome field. I also work in the same field doing similar experiments, but sometimes it is better to stop and look back what you have been doing. This review has discussed some important points on the transmissibility of human diseases in human microbiota-associated mouse models. They acknowledge the importance of human microbiota-associated mouse models as valuable resource in the microbiome field. However, through systematic review they demonstrate that according to current literature it is easily possible to transfer (any!) human disease in mice through microbiota transplant. The inflated positivity and hype around these experiments must be criticized. Most importantly, they talk about the relevance of negative transplant studies, which are seldom published, and urge to use rigorous statistics to improve the data interpretation. Following are some excerpts from the review, though reading full review is highly recommended.

The problem with the concept:

“Because a “normal” or “healthy” microbiome has not been defined yet, we use the term dysbiosis to refer solely to an altered microbiome associated with a specific disease or condition as compared to a control. Whether such “dysbiotic” microbiomes are the cause or consequence of disease, or whether both are caused by a third factor, is, in most instances, unproven.”

“There are two well-documented diseases in the microbiome field that link a microbial biomarker with causation in disease: Helicobacter pylori-associated peptic ulceration and gastric cancer, and Clostridium (or Clostridioides) difficile infection-associated diarrhea. However, causal inferences between complex microbiomes and other inflammatory, metabolic, neoplastic, and neuro-behavioral disorders have been neither compelling nor conclusive.”

“A substantial proportion of the taxa that comprise the human gut microbiome fail to colonize in the recipient animals. Most importantly, the ecological factors (such as diet, lifestyle, disease phenotype, and human genotype) that have driven the dysbiosis in humans in the first place are absent in the recipient rodents, making it unlikely that disease-associated alterations are replicated. Taxa that colonize at sufficient levels may not engage in the EVOLUTIONARY routed host-microbe interactions that they establish with their native host.”

“Consider H. pylori and C. difficile, two members of the human microbiome with established causality in human disease, neither of which exhibit sufficient colonization to cause reliable pathology in conventional murine models.”

Results from systematic review:

“Of 38 studies meeting the inclusion criteria, all but two (36/38; 95%) concluded that fecal transfer from diseased donors resulted in at least one phenotype of the human disease being greater in the recipient mice when compared with transfers from healthy donors.”

Of all the studies, 63% (24/38) of the studies tested for a dysbiosis in the original human donor samples, and only 29% (11/38) confirmed that at least some aspect (reduced diversity, ecosystem processes/services, loss or bloom of specific taxa, or shifts in metabolic capacity) of the “human dysbiosis” was replicated in the recipient animals. Consequently, the majority of studies did not attempt to identify the “causal component” of the microbiome. Only a few studies (34%; 13/38) identified potential underlying mechanisms linking the dysbiotic microbiome with disease.”

Issues with statistics 

“Often, a small number (1–5) of human donors is used per human disease and control group, and these “donor microbiomes” are then replicated in a larger number of individual mice, which are then often used for statistical inference.”

“The result is “pseudoreplication,” which artificially inflates the sample size, the chance for “false positive” findings, and the evidence for a scientific claim. This problem is amplified if donor samples are pooled before the inoculation of groups of rodents, which is common practice for both the “diseased” and healthy control samples. We found that 84% (32/38) of the published studies on HMA murine models used the individual animals as the statistical inference, although animal numbers were much higher than the number of human donors and therefore inflated. Only 16% of studies (6/38) were clear in their use of the individual human donor samples as the “N” for statistical inferences or used the same number of rodents as donors.”

“When virtually all reports are positive, as in our systematic review, the greater the doubt will be and the more justified the scrutiny should be.”

Suggestions for alternative experimental approach

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Why is it important to change?

“Specifically, the correction of altered microbiomes, be it by FMT, live biotherapeutics, or microbial products, will be beneficial only if the alterations are causal or contributory to the disease rather than a bystander response. Causal claims in the microbiome field are often overstated and disproportional to the experimental evidence from which they are derived, and it has become difficult to identify a disease state in which the microbiome has not been implicated in the scientific literature, a notion amplified in the popular press.”

“Sadly, most researchers and reviewers in the microbiome field, and almost all editors of high-impact journals, seem to regard acceptance of the null hypothesis as a failure. As with all scientific endeavor, our field would be served better if editorial policies of higher tier journals and guidelines of funding agencies discouraged any discrimination against negative data, replications, validations of experimental designs, and statistical analyses.”

January 27, 2020

In today’s Monday morning post – establishing causality for gut microbiome using human microbiota associated rodents, gut microbiota profiling in pregnant women after bariatric surgery, proteomics changes in bacteria, discovery of core microbiome of common bean rhizosphere and many more.

General Microbiome

Establishing or Exaggerating Causality for the Gut Microbiome: Lessons from Human Microbiota-Associated Rodents – Jens Walter – Cell

Microbial Genomics and Metagenomics in India: Explorations and Perspectives– Princy Hira – Proceedings of Indian National Science Academy

Human Microbiome

Longitudinal metabolic and gut bacterial profiling of pregnant women with previous bariatric surgery – Kiana Ashley West – Gut

Identifying determinants of bacterial fitness in a model of human gut microbial succession – Lihui Feng – PNAS

16S rDNA microbiome composition pattern analysis as a diagnostic biomarker for biliary tract cancer – Huisong Lee – World Journal of Surgical Oncology

Faecal microbiota transplantations and urinary tract infections – Jean Christophe Lagier – Lancet

Animal Microbiome

Influences of a Prolific Gut Fungus (Zancudomyces culisetae) on Larval and Adult Mosquito (Aedes aegypti)-Associated Microbiota – Jonas Frankel-Bricker – Applied and Environmental Microbiology

Functional dynamics of bacterial species in the mouse gut microbiome revealed by metagenomic and metatranscriptomic analyses – Youn Wook Chung – PlosOne

Early life microbiome perturbation alters pulmonary responses to ozone in male mice – Traci A. Brown – Physiological Reports

Evolution and maintenance of microbe-mediated protection under occasional pathogen attack – Anke Kloock – BioRxiv

Plant, root and soil microbiome

Community sequencing on a natural experiment reveals little influence of host species and timing but a strong influence of compartment on the composition of root endophytes in three annual Brassicaceae – Jose G Macia-Vicente – BioRxiv

Discovery of a spatially and temporally persistent core microbiome of the common bean rhizosphere – Nejc Stopnisek – BioRxiv

Resident and phytometer plants host comparable rhizosphere fungal communities in managed grassland ecosystems – Ricardo Schöps – Scientific Reports

Evaluation of fatty acid derivatives in the remediation of aged PAH-contaminated soil and microbial community and degradation gene response – Qingling Wang – Chemosphere

Techniques

Proteomic changes in bacteria caused by exposure to environmental conditions can be detected by Matrix-Assisted Laser Desorption/Ionization – Time of Flight (MALDI-ToF) Mass Spectrometry – Denise Chac – BioRxiv

Probiotics, prebiotics

Beneficial bile acid metabolism from Lactobacillus plantarum of food origin – Roberta Prete – Scientific Reports

Microbes in the news

Could a kid’s microbiome alter their behaviour? – Health24

Microbiome Therapeutics Market Report Forecast by Capital Investment, Industry Outlook, Opportunities & Trends 2024 – Fusion Science Academy

January 10, 2020

In today’s weekend post- maternal antibodies targeting microbiota protect mice from neonatal infection, exercise improves gestational diabetes in rodent models, bacterial signature in NAFLD and TMAO as negative predictor of human embryo quality. Happy reading and a nice weekend!

General microbiome

Adolescence and aging: impact of adolescence inflammatory stress and microbiota alterations on brain development, aging and neurodegeneration – Nour Yahfoufi – The Journal of Geronotology

Preclinical and clinical relevance of probiotics and synbiotics in colorectal carcinogenesis: a systematic review – Bruna C.S. Cruz – Nutrition Reviews

Gut microbiota: a new piece in understanding hepatocarcinogenesis – An Zhou – Cancer Letters

Gut Microbiota, Diet, and Chronic Diseases: The Role Played by Oxidative Stress – Elisardo C. Vasquez – Oxidative Medicine and Cellular Longevity

New insights on the colonization of the human gut by health-promoting bacteria – Sinead T. Morrin – Applied Microbiology and Biotechnology

Human microbiome

Salivary microbiota and inflammation‐related proteins in patients with psoriasis – Daniel Belstrøm – Oral Diseases

Oral butyrate does not affect innate immunity and islet autoimmunity in individuals with longstanding type 1 diabetes: a randomised controlled trial – Pieter F. de Groot – Diabetologia

Fusobacterium nucleatum in the colorectum, and its association with cancer risk and survival: a systematic review and meta-analysis – Christian Gethings-Behncke – Cancer Epidemiology Biomarkers and Prevention

Potential impact of removing metronidazole from treatment armamentarium of mild acute Clostridioides difficile infection – Shani Zilberman-Itskovich – Future Medicine

Intrahepatic bacterial metataxonomic signature in non-alcoholic fatty liver disease Silvia Sookoian – Gut

Microbial imbalance in inflammatory bowel disease patients at different taxonomic levels – Mohammad Tauqeer Alam – Gut Pathogens

Early life microbiota

Antibiotic Resistance Genes in the Gut Microbiota of Children with Autistic Spectrum Disorder as Possible Predictors of the Disease – Alexey S. Kovtun – Microbial Drug Resistance

Trimethylamine-N-oxide is present in human follicular fluid and is a negative predictor of embryo quality – R.A.Nagy – Human Reproduction

Animal experiments

Microbiota-targeted maternal antibodies protect neonates from enteric infection – Wen Zheng – Nature

Characterization of metabolic and inflammatory profiles of transition dairy cows fed an energy-restricted diet – Giulia Esposito – Journal of Animal Science

Microbiota dependent production of butyrate is required for the bone anabolic activity of PTH – Jau-Yi Li – Journal of Clinical Investigation

Betaine addition as a potent ruminal fermentation modulator under hyperthermal and hyperosmotic conditions in vitro – Mubarik Mahmood – Journal of the Science of Food and Agriculture

Investigating temporal microbial dynamics in the rumen of beef calves raised on two farms during early life – Eóin O’Hara – FEMS Microbial Ecology

Dietary Xanthan Gum Alters Antibiotic Efficacy against the Murine Gut Microbiota and Attenuates Clostridioides difficile Colonization – Matthew K. Schnizlein – mSphere

Post‐natal co‐development of the microbiota and gut barrier function follows different paths in the small and large intestine in piglets – Alexis Pierre Arnaud – Faseb Journal

Phellinus linteus polysaccharide extract improves insulin resistance by regulating gut microbiota composition – Yangyang Liu – Faseb Journal

Exercise improves metabolic function and alters the microbiome in rats with gestational diabetes – Dayana Mahizir – Faseb Journal

Microbial reconstitution reverses early female puberty induced by maternal high-fat diet during lactation – Mengjie Wang – Endocrinology

Fecal microbiota as a noninvasive biomarker to predict the tissue iron accumulation in intestine epithelial cells and liver – Bingdong Liu – Faseb Journal

Techniques

Systematic Analysis of Impact of Sampling Regions and Storage Methods on Fecal Gut Microbiome and Metabolome Profiles – Yali Liang – mSphere

December 6, 2019

Today’s post is about metabolic networks of the human gut microbiota with host, how aging affects microbial world in humans, microbiome in honey bee and lifestyle dependent gut microbiota gradients in diverse Indian population. Have a nice weekend!

General microbiome

Review: Metabolic networks of the human gut microbiota – Susannah Selber-Hnatiw – Microbiology

Review: Cannabinoids and the Microbiota‐Gut‐Brain‐Axis: Emerging Effects of Cannabidiol and Potential Applications to Alcohol Use Disorders – Hollis C. Karoly – Alcoholism Clinical and Experimental Research

Review: The Unexplored World of Human Virome, Mycobiome, and Archaeome in Aging – Oscar Salvador Barrera-Vázquez – Journal of Gerontology

Review: Nanotechnology intervention of the microbiome for cancer therapy – Wantong Song – Nature Nanotechnology

Commentary: Gut microbiome influences exercise response – Claire Greenhill – Nature Reviews Endocrinology

Human microbiome

Bacterial DNA induces the formation of heat-resistant disease-associated proteins in human plasma – Victor Tetz – Scientific Reports

Lifestyle induced microbial gradients: An Indian perspective – Rashmi Singh – Frontiers in Microbiology

Microbiota, type 2 diabetes and non-alcoholic fatty liver disease: protocol of an observational study – Benedetta M. Motta – Journal of Translational Medicine

Antibiotic exposure and the risk of colorectal adenoma and carcinoma: systematic review and meta‐analysis of observational studies – Leigh N. Sanyaolu – Colorectal Disease

Higher frequency of vertebrate‐infecting viruses in the gut of infants born to mothers with type 1 diabetes – Ki Wook Kim – Pediatric Diabetes

Animal experiments

Integrative analysis of the gut microbiota and metabolome in rats treated with rice straw biochar by 16S rRNA gene sequencing and LC/MS-based metabolomics – Jie Han – Scientific Reports

Division of labor in honey bee gut microbiota for plant polysaccharide digestion – Hao Zheng – PNAS

The effect of carbohydrate sources: Sucrose, invert sugar and components of mānuka honey, on core bacteria in the digestive tract of adult honey bees (Apis mellifera) – Michelle A. Taylor – PlosOne

Seven-day Green Tea Supplementation Revamps Gut Microbiome and Caecum/Skin Metabolome in Mice from Stress – Eun Sung Jung – Scientific Reports

Cattle intestinal microbiota shifts following Escherichia coli O157:H7 vaccination and colonization travel – Raies A. Mir – PlosOne

Characterization of the cecal microbiome composition of Wenchang chickens before and after fattening – Zhen Tan – PlosOne

SOD1 deficiency alters gastrointestinal microbiota and metabolites in mice – Haruka Sagi – Experimental Gerontology

Plant, soil, root microbiome

Host-mediated microbiome engineering (HMME) of drought tolerance in the wheat rhizosphere – Michael D. Jochum – PlosOne

Arctic tundra soil bacterial communities active at subzero temperatures detected by stable isotope probing – Preshita S. Gadkari – FEMS Microbiology Ecology

Techniques

Comparison of extraction methods for recovering ancient microbial DNA from paleofeces – Richard W. Hagan – American Journal of Physical Anthropology

Microbes in the news

How Microbiomes Affect Fear – Quanta Magazine

Rainforest Dwellers and Urbanites Have Consistently Different Microbiomes – Scientific American

Human Microbiome Modulators Market is Furbishing worldwide with Bayer, BioGaia, Chr. Hansen Holding, DowDuPont – News Description

November 11, 2019

Monday’s morning digest is all about interesting updates in microbiome field – real time sampling of international travelers to study antibiotic resistant bacteria, new techniques on using rectal swabs instead of fecal samples to study infant microbiota, 16srRNA gene sequencing for strain level identification and if neutraceutical consumption helps in multiple sclerosis! Finally some interesting review articles on microbial ecology in wine making and a Movember month featured article on association of gut microbiome with men’s sexual health. Enjoy reading!

General microbiome

From the vineyard to the winery: how microbial ecology drives regional distinctiveness of wine – Di Liu – Frontiers in Microbiology

The Gut Microbiome and Men’s Sexual Health – Mohamad M. Osman – Current Sexual Heath Reports

Antibacterial Soaps and Other Cleaners May Actually Be Aiding in the Development of Super Bacteria – Shimon Shatzmiller – Pharmacology, Toxicology and Pharmaceutics

Dietary lipids, gut microbiota and lipid metabolism – Marc Schoeler – Reviews in Endocrine and Metabolic Disorders

Human microbiome

Functional characterisation of gut microbiota and metabolism in Type 2 diabetes indicates that Clostridiales and Enterococcus could play a key role in the disease – Marina Mora-Ortiz – BioRxiv

Real-time sampling of travelers shows intestinal colonization by multidrug-resistant bacteria to be a dynamic process with multiple transient acquisitions – A. Kantele – BioRxiv

A multi-omic cohort as a reference point for promoting a healthy human gut microbiome – Zhuye Jie – BioRxiv

Antimicrobial resistance gene prevalence in a population of patients with advanced dementia is related to specific pathobionts – Aislinn D. Rowan-Nash – BioRxiv

Genomic characterization of the non-O1/non-O139 Vibrio cholerae strain that caused a gastroenteritis outbreak in Santiago, Chile, 2018 – Mónica Arteaga – BioRxiv

Molecular Reconstruction of the Diet in Human Stool Samples – Frank Maixner – mSystems

Infant microbiome

Impacts of Delivery Mode on Very Low Birth Weight Infants’ Oral Microbiome – Hongping Li – Pediatrics and Neonatology

Biomarker Research in ADHD: the Impact of Nutrition (BRAIN) – study protocol of an open-label trial to investigate the mechanisms underlying the effects of a few-foods diet on ADHD symptoms in children – Tim Stobernack – BMJ Open

Immunometabolic approaches to prevent, detect, and treat neonatal sepsis – Maria Giulia Conti – Pediatric Research

Rectal swabs are a reliable proxy for faecal samples in infant gut microbiota research based on 16S-rRNA sequencing – Marta Reyman – Scientific Reports

Gut microbiome of treatment-naïve MS patients of different ethnicities early in disease course – R. E. Ventura – Scientific Reports

Animal experiments

Vasoactive intestinal peptide deficiency is associated with altered gut microbiota communities in male and female C57BL/6 mice – Manpreet Bains – Frontiers in Microbiology

Metabolic analysis of regionally distinct gut microbial communities using an in vitro platform – Jenni Firrman – Agricultural and Environmental Chemistry

Effect of Diet on the Enteric Microbiome of the Wood-Eating Catfish Panaque nigrolineatus – Harold J. Schreier – Frontiers in Microbiology

A high-fat/high-protein, Atkins-type diet exacerbates Clostridioides (Clostridium) difficile infection in mice, whereas a high-carbohydrate diet protects – Chrisabelle C. Mefferd – BioRxiv

Plant, soil, root microbiome

Effects of repeated applications of urea with DMPP on ammonia oxidizers, denitrifiers, and non-targeted microbial communities of an agricultural soil in Queensland, Australia – Aineah Obed Luchibia – Applied Soil Ecology

Covariation of diet and gut microbiome in African megafauna – Tyler R. Kartzinel – PNAS

Fungal communities resist recovery in sand mine restoration – Miranda Hart – Frontiers in Forest and Global Change

Microbial community structure and ecology in sediments of a pristine mangrove forest – C.O.Santana – BioRxiv

Bridging the gap between single-strain and community-level plant-microbe chemical interactions – Bridget O’Banion – Molecular Plant-Microbe Interactions

A brief from the leaf: latest research to inform our understanding of the phyllosphere microbiome – Johan HJ Leveau – Current Opinion in Microbiology

Water microbiome

Metabolic and biogeochemical consequences of viral infection in aquatic ecosystems Amy E. Zimmerman – Nature Reviews Microbiology

Down to the bone: the role of overlooked endolithic microbiomes in reef coral health – Mathieu Pernice – ISME Journal

Differential responses of stream water and bed sediment microbial communities to watershed degradation – Hehuan Liao – Environment International

B12 production by marine microbial communities and Dinoroseobacter shibae continuous cultures under different growth and respiration rates – Josue Villegas-Mendoza – Aquatic Microbial Ecology

Quantifying the contribution of microbial immigration in engineered water systems – Ran Mei – Microbiome

Microbial community rearrangements in power-to-biomethane reactors employing mesophilic biogas digestate – Norbert Ács – Frontiers in Energy Research

Techniques

Evaluation of 16S rRNA gene sequencing for species and strain-level microbiome analysis – Jethro S. Johnson – Nature Communications

AMR – An R Package for Working with Antimicrobial Resistance Data – Matthijs S. Berends – BioRxiv

Probiotics Prebiotics

The effect of emerging nutraceutical interventions for clinical and biological outcomes in multiple sclerosis: A systematic review – Wolfgang Marx – Multiple Sclerosis and Related Disorders

Resveratrol treatment improves the altered metabolism and related dysbiosis of gut programed by prenatal high-fat diet and postnatal high-fat diet exposure – Yi-Chuan Huang – The Journal of Nutritional Biochemistry

The effects of inulin on gut microbial composition: a systematic review of evidence from human studies – Quentin Le Bastard – European Journal of Clinical Microbiology & Infectious Diseases

November 8, 2019

Today’s week-end digest is about new bioinformatic tools (MGnify, PIME, MDiNE) for microbiota analysis, how chemical and built environment of home affects human microbiota and  guidelines for the gut microbiome studies in hypertension.

General microbiome

Adaptation of the Gut Microbiota to Modern Dietary Sugars and Sweeteners – Sara C. Di Rienzi – Advances in Nutrition

Bacteriophages in gastroenterology—from biology to clinical applications – João Sabino – Alimentary Pharmacology and Therapeutics

Boosting natural history research via metagenomic clean-up of crowdsourced feces – Amrita Srivathsan – Plos Biology

Human microbiome

Lower gut microbiome diversity and higher abundance of proinflammatory genus Collinsella are associated with biopsy-proven nonalcoholic steatohepatitis – Stuart Astbury – Gut Microbes

Guidelines for Transparency on Gut Microbiome Studies in Essential and Experimental Hypertension – Francine Z. Marques – Hypertension

The association between dietary fibre deficiency and high-income lifestyle-associated diseases: Burkitt’s hypothesis revisited – Stephen J. O’Keefe – The Lancet Gastroenterology and Hepatology

Animal experiments

Bacterial Swarming as a Protective Response to Intestinal Stress – Weijie Chen – BioRxiv

Flaxseed oil supplementation improves intestinal function and immunity, associated with altered intestinal microbiome and fatty acid profile in pigs with intrauterine growth retardation – Lianqiang Che – Food and Function

Gamma-aminobutyric acid-producing lactobacilli positively affect metabolism and depressive-like behaviour in a mouse model of metabolic syndrome – E. Patterson – Scientific Reports

Plant, root and soil microbiome

Short term effects of different green manure amendments on the composition of main microbial groups and microbial activity of a submerged rice cropping system – Muhammad Israr Khan – Applied Soil Ecology

Cost-effective in-situ remediation technologies for complete mineralization of dyes contaminated soils – Vipul R. Patel – Chemosphere

Distinct Microbial Community of Phyllosphere Associated with Five Tropical Plants on Yongxing Island, South China Sea – Lijun Bao – Microorganisms

Tracing the evolutionary routes of plant–microbiota interactions – Carmen Escudero-Martinez – Current Opinion in Microbiology

Water microbiome

Diet shapes cold‐water corals bacterial communities – Pierre E. Galand – Environmental Microbiology

Built Environment

Home chemical and microbial transitions across urbanization – Laura-Isobel McCall – Nature Microbiology

Techniques

Learning representations of microbe–metabolite interactions – James T. Morton – Nature Methods

MGnify: the microbiome analysis resource in 2020 – Alex L. Mitchell – Nucleic Acids Research

PIME: A package for discovery of novel differences among microbial communities – Luiz Fernando W. Roesch – Molecular Ecology Resources

MDiNE: A model to estimate differential co-occurrence networks in microbiome studies – Kevin McGregor – Bioinformatics

Probiotics

Fermentation of plant-based milk alternatives for improved flavour and nutritional value – Muzi Tangyu – Applied Microbiology and Biotechnology

Modulations of Probiotics on Gut Microbiota in a 5‐Fluorouracil‐Induced Mouse Model of Mucositis – Chun Yan Yeung – Journal of Gastroenterology and Hepatology

The effect of an additive containing three Lactobacillus species on the fermentation pattern and microbiological status of silage – Maja Fijałkowska – Journal of the Science of Food and Agriculture

Microbes in the news

Gut Microbiome Puts the Brakes on Iron Absorption – Michigan Medicine

The Link Between Sleep and Your Gut Microbiome – Health central

Microbiome in China: Cosmetic trend will ‘heat up’ by the end of 2020, says expert – Cosmetics Design-Asia

Enterome Enters Research Collaboration With Major Cancer Center Focused on New Microbiome-derived Immunotherapies – Yahoo Finance

Non Microbiology Picks

Is running associated with a lower risk of all-cause, cardiovascular and cancer mortality, and is the more the better? A systematic review and meta-analysis – Zeljko Pedisic – British Journal of Sports Medicine

October 28, 2019

Monday morning digest is about microbiome and microbial metabolites in depression, neuronal function and fear extinction, and epilepsy in children; functional foods in lung cancer risk and microbiota based novel marker of colorectal cancer.

General microbiome

Gut microbial metabolites in depression: understanding the biochemical mechanisms – Giorgia Caspani – Microbial Cell

Engineering commensal bacteria to rewire host–microbiome interactions – In Young Hwang – Current Opinion in Biotechnology

Human microbiome

The composition and functional protein subsystems of the human nasal microbiome in granulomatosis with polyangiitis: a pilot study – Josef Wagner – Microbiome

Autoinducer-2 of gut microbiota, a potential novel marker for human colorectal cancer, is associated with the activation of TNFSF9 signaling in macrophages – Qing Li – Oncoimmunology

Distinct Gut Microbiota Composition and Functional Category in Children With Cerebral Palsy and Epilepsy – Congfu Huang – Frontiers in Pediatrics

Drug resistant gut bacteria mimic a host mechanism for anticancer drug clearance – Peter Spanogiannopoulos – BioRxiv

A comprehensive human minimal gut metagenome extends the host’s metabolic potential – Marcos Parras-Molto – BioRxiv

Enriched taxa were found among the gut microbiota of centenarians in East China – Na Wang – PlosOne

Animal experiments

The microbiota regulate neuronal function and fear extinction learning – Coco Chu – Nature

Syntrophic growth of alkaliphilic anaerobes controlled by ferric and ferrous minerals transformation coupled to acetogenesis – Daria G. Zavarzina – ISME Journal

Contribution of fungal microbiome to intestinal physiology, early-life immune development and mucosal inflammation in mice – Erik van Tilburg Bernardes – BioRxiv

Plant, root, soil microbiome

Root-associated microbiomes of wheat under the combined effect of plant development and nitrogen fertilization – Shuaimin Chen – Microbiome

Water microbiome

Deterministic and stochastic processes driving the shift in the prokaryotic community composition in wastewater treatment plants of a coastal Chinese city – Liyuan Hou – Applied Microbiology and Biotechnology

Metabolic specializations within a bacterial community to create living rocks – Samantha C Waterworth – BioRxiv

Probiotics/Prebiotics

Association of Dietary Fiber and Yogurt Consumption With Lung Cancer Risk Jae Jeong Yang – JAMA Oncology

Effect of probiotics on the occurrence of nutrition absorption capacities in healthy children: a randomized double-blinded placebo-controlled pilot study – A. Ballini – European Review for Medical and Pharmacological Sciences

Microbes in the news

Can we predict the future? Bill Gates says yes, in this one area – CNBC

Exposure to Sunlight Boosts Good Gut Microbiome Bacteria, and Vitamin D Levels – Genetic Engineering and Biotechnology News

Harnessing the Power of Microbes to Fight Cancer – Medscape

September 30, 2019

Monday morning digest covers exciting updates in microbiome with – meta analysis on role of probiotics in human depression , stool banking guidelines for fecal microbiota transplant, expert view on translation of gut microbiome to clinics and a historical peek into use of ceramic baby milk bottles in prehistoric times. Enjoy reading!

General microbiome

Translating the gut microbiome: ready for the clinic? – Susan V. Lynch – Nature Reviews Gatroenterology and Hepatology

Uterine immunity and microbiota: A shifting paradigm – Chiara Agostinis – Frontiers in Immunology

Human microbiome

Cigarette smoking and oral microbiota in low-income and African-American populations – Yaohua Yang – Journal of Epidemiology and Community Health

International consensus conference on stool banking for faecal microbiota transplantation in clinical practice – Giovanni Cammarota – Gut

Animal experiments

The intestinal microbiota programs diurnal rhythms in host metabolism through histone deacetylase 3 – Zheng Kuang – Science

Transfusional iron overload and intravenous iron infusions modify the mouse gut microbiota similarly to dietary iron – Francesca La Carpia – Biofilms and Microbiomes

Proteome modifications of gut microbiota in mice with activity-based anorexia and starvation: Role in ATP production – Jonathan Breton – Nutrition

Molecular ecology of the yet uncultured bacterial Ct85-cluster in the mammalian gut – Ulla Hynönen – Anaerobe

Intestinal inflammation increases convulsant activity and reduces antiepileptic drug efficacy in a mouse model of epilepsy – Carmen De Caro – Scientific Reports

The fecal resistome of dairy cattle is associated with diet during nursing – Jinxin Liu – Nature Communications

Neohesperidin Prevents Colorectal Tumorigenesis by Altering the Gut Microbiota – Yanling Gong – Pharmacological Research

Changes of serum lipopolysaccharide, inflammatory factors, and cecal microbiota in obese rats with type 2 diabetes induced by Roux-en-Y gastric bypass – Jiao Wu – Nutrition

Plant, root, soil microbiome

A bioinformatics guide to plant microbiome analysis – Rares Lucaciu – Frontiers in Plant Science

Beyond pathogens: microbiota interactions with the plant immune system – Paulo José PL Teixeira – Current Opinion in Microbiology

Water microbiome

Microbial communities of the Mediterranean rocky shore: ecology and biotechnological potential of the sea‐land transition – Esther Molina-Menor – Microbial Biotechnology

Probiotics

Bacillus coagulans R11 maintained intestinal villus health and decreased intestinal injury in lead-exposed mice by regulating the intestinal microbiota and influenced the function of faecal microRNAs – Si-Cheng Xing – Environmental Pollution

Effect of probiotics on depressive symptoms: A meta-analysis of human studies – Kah Kheng Goh – Psychiatry Research

Non Microbiology Picks

Milk of ruminants in ceramic baby bottles from prehistoric child graves – J. Dunne – Nature

 

September 24, 2019

Today’s digest is about diet-microbiota interactions in personalized  nutrition, interesting story on single bacterium association with fatty liver disease and how the gut microbiota adapt to red meat consumption.

General microbiome

Diet–microbiota interactions and personalized nutrition – Aleksandra A. Kolodziejczyk – Nature Reviews Microbiology

Citrobacter rodentium–host–microbiota interactions: immunity, bioenergetics and metabolism – Caroline Mullineaux-Sanders – Nature Reviews Microbiology

The interaction between the gut Microbiota and herbal medicines – Xuedong An – Biomedicine & Pharmacotherapy

Gut microbiota: what is its place in pharmacology? – Aleksandra Tarasiuk – Expert Review of Clinical Pharmacology

Human microbiome

Fatty Liver Disease Caused by High-Alcohol-Producing Klebsiella pneumoniae – Jing Yuan – Cell Metabolism

Association of Alterations in Intestinal Microbiota With Impaired Psychological Function in Patients With Inflammatory Bowel Diseases in Remission – Fabienne Humbel – Clinical Gastroenterology and Hepatology

Butyrate‐Producing Gut Bacteria and Viral Infections in Kidney Transplant Recipients: A Pilot Study – John R. Lee – Transplant Infectious Disease

Metabolomics and Microbial Composition Increase Insight into the Impact of Dietary Differences in Cirrhosis – I. Jane Cox – Liver International

Animal experiments

Gut bacteria responding to dietary change encode sialidases that exhibit preference for red meat-associated carbohydrates – Livia S. Zaramela – Nature Microbiology

A processive endoglucanase with multi-substrate specificity is characterized from porcine gut microbiota – Weijun Wang – Scientific Reports

Comparative analysis of the fecal microbiota from different species of domesticated and wild suids – Florencia Correa-Fiz – Scientific Reports

Escherichia coli clonobiome: assessing the strains diversity in feces and urine by deep amplicon sequencing – Sofiya G. Shevchenko- Applied and Environmental Microbiology

Saponins from Clematis mandshurica Rupr. regulates gut microbiota and its metabolites during alleviation of collagen-induced arthritis in rats – Lin-Xiu Guo – Pharamacological Research

MHC Class II Antigen Presentation by the Intestinal Epithelium Initiates Graft-versus-Host Disease and Is Influenced by the Microbiota – Motoko Koyama – Immunity

Metformin Alters the Duodenal Microbiome and Decreases the Incidence of Pancreatic Ductal Adenocarcinoma Promoted by Diet-induced Obesity – Tien S Dong – American Journal of Physiology

Effects from diet-induced gut microbiota dysbiosis and obesity can be ameliorated by fecal microbiota transplantation: A multiomics approach – Maria Guirro – PlosOne

Short-chain fatty acids and microbiota metabolites attenuate ghrelin receptor signaling – Cristina Torres-Fuentes – Faseb Journal

Effects of berberine and metformin on intestinal inflammation and gut microbiome composition in db/db mice – Wang Zhang – Biomedicine & Pharmacotherapy

Plant, root, soil microbiome

Water-soluble mercury induced by organic amendments affected microbial community assemblage in mercury-polluted paddy soil – Hualing Hu – Chemosphere

Phyllosphere colonisation by a soil Streptomyces sp. promotes plant defense responses against fungal infection – Sophie Vergnes – Molecular Plant-Microbe Interactions

Water microbiome 

Heat‐induced shift in coral microbiome reveals several members of the Rhodobacteraceae family as indicator species for thermal stress in Porites lutea – Wirulda Pootakham – Microbiology Open

Probiotics
Metabolomic profiling of oxalate-degrading probiotic Lactobacillus acidophilus and Lactobacillus gasseri – Casey A. Chamberlain – PlosOne

Probiotic Bifidobacterium bifidum G9‐1 ameliorates phytohemagglutinin‐induced diarrhea caused by intestinal dysbiosis -Yutaka Makizaki – Microbiology and Immunology

August 28, 2019

Today’s digest features interesting review articles about different aspects of human gut microbiome,  metaproteomics approach in microbiota, new study to tackle antibiotic resistance and updates on microbiome business.

General Microbiome

The long-term consequences of antibiotic therapy: Role of colonic short-chain fatty acids (SCFA) system and intestinal barrier integrity – Yuliia Holota – Plos One

Factors affecting the composition of the gut microbiota, and its modulation – Nihal Hasan – Peer Journal

The Microbiota and Malnutrition: Impact of Nutritional Status During Early Life – Carlos Gómez-Gallego – Annual review of Nutrition

The necessity to revise Koch’s postulates and its application to infectious and non-infectious diseases: a mini-review – Hasan Hosainzadegan – European Journal of Clinical Microbiology & Infectious Diseases

Pancreas–Microbiota Cross Talk in Health and Disease – Timon E. Adolph – Annual Review of Nutrition

Does Soil Contribute to the Human Gut Microbiome? – Winfried E.H. Blum – Microorganisms

Impact of the Microbiome on the Human Genome – Thiviya Jeyakumar – Trends in Parasitology

Problems with the concept of gut microbiota dysbiosis – Harald Brüssow – Microbial Biotechnology

Human microbiome

Lactulose Improves Cognition, Quality of Life and Gut Microbiota in Minimal Hepatic Encephalopathy: A Multi‐Center, Randomized Controlled Trial – Ji Yao Wang – Journal of Digestive Diseases

Microbial Profiles of Cirrhosis in the Human Small Intestine – Tien S. Dong – Current Gastroenterology Reports

Crosstalk between vaginal microbiome and female health: A review – Shagun Gupta – Microbial Pathogenesis

Animal experiments

Metformin and Dipeptidase Peptidyl-4 Inhibitor Differentially Modulate the Intestinal Microbiota and Plasma Metabolome of Metabolically Dysfunctional Mice – Ryan PM – Canadian Journal of Diabetes

The gut microbiome derived from anorexia nervosa patients impairs weight gain and behavioral performance in female mice – Tomokazu Hata – Endocrinology

Microbiota-derived lantibiotic restores resistance against vancomycin-resistant Enterococcus – Sohn G. Kim – Nature

Probiotics and prebiotics 

Developments in understanding and applying prebiotics in research and practice – an ISAPP conference paper – Karen P Scott – Journal of Applied Microbiology

Techniques

An automated ‘cells-to-peptides’ sample preparation workflow for high-throughput, quantitative proteomic assays of microbes – Yan Chen – Journal of Proteome Research

Comparison of metaproteomics workflows for deciphering the functions of gut microbiota in an animal model of obesity – Maria Guirro – Journal of Proteomics

An expectation-maximization algorithm enables accurate ecological modeling using longitudinal microbiome sequencing data – Chenhao Li – Microbiome

Microbes in the news

‘A holistic approach’: EU-backed project taps microbiome to optimise food production – Food navigator.com

Remodeling unhealthful gut microbiomes to fight disease – Science daily

The microbiome and the effect of antimicrobials in food production – New Food

Researchers propose new technique to remodel the gut microbiome – News Atlas

Microbes and the market

Global Human Microbiome Market 2019 Research Analysis of Players:- Merck, DuPont, MicroBiome Therapeutics, Osel – Global Market News 24

Microbiome Sequencing Market Forecast by Biolog Inc., CosmosID Inc., Illumina Inc., Metabiomics and Oxford Nanopore Technologies Ltd to 2024 – SocioHerald