Intestinal microbiota in neonates requiring urgent surgery: assessing the role of probiotics using fecal DNA sequencing

2015 ◽  
Vol 32 (1) ◽  
pp. 37-43 ◽  
Author(s):  
Hiroshi Murakami ◽  
Yumi Shimomura ◽  
Mitsuharu Matsumoto ◽  
Geoffrey J. Lane ◽  
Atsuyuki Yamataka ◽  
...  
Keyword(s):  
Dna Sequencing ◽  
Intestinal Microbiota ◽  
Fecal Dna ◽  
Urgent Surgery

scholarly journals THE CONTROVERSIAL ROLE OF PLACENTAL MICROBIOME IN PRETERM BIRTH

2021 ◽  
Vol 24 (2) ◽  
pp. 76-82
Author(s):  
Valentin Varlas ◽  
◽  
Ovidiu Peneș ◽  
Ioanina Părlătescu ◽  
◽  
...  
Keyword(s):  
Preterm Birth ◽  
Dna Sequencing ◽  
Intestinal Microbiota ◽  
Premature Birth ◽  
Human Microbiome ◽  
The Body ◽  
Microbial Colonization ◽  
Pros And Cons ◽  
In Pregnancy

The correlation between the maternal and neonatal microbiome helps to understand the mechanisms that govern the metabolic and immune processes of the newborn. The literature of recent years brings pros and cons regarding the role of the placenta as a microbial residence and its involvement secondary to microbial colonization in premature birth. Additional multi-omics research will be needed to establish the role of this transient organ in elucidating the processes that govern premature birth. DNA sequencing has made it possible to identify microbial species in the human microbiome. Thus, the role of the maternal microbiome in pregnancy and related complications are partially elucidated. This article aimed to identify the diversity of species in the maternal placental microbiome, the possible association with the newborn microbiome, and the influence of dysbiosis in spontaneous premature birth (PTB). In pregnancy, the changes in the microbiome are multifactorial, and the analysis performed demonstrating the continuous intervention of the body in order to adapt the intestinal microbiota to have a positive maternal-fetal result.

The role of intestinal microbiota in the development of urolithiasis in patients with an irritable bowel syndrome

2020 ◽  
Vol 0 (3) ◽  
pp. 29-36
Author(s):  
I. A. Derkach ◽  
A. E. Dorofeyev ◽  
M. M. Rudenko ◽  
G. A. Dorofeyeva ◽  
Yu. Z. Dynia
Keyword(s):  
Irritable Bowel Syndrome ◽  
Intestinal Microbiota ◽  
Irritable Bowel

Role of intestinal microbiota in cardiovascular diseases

2020 ◽  
Vol 18 (1) ◽  
pp. 54-59
Author(s):  
R. A. FAYZULLINA ◽  
◽  
K. A. SAFINA ◽  
Keyword(s):  
Cardiovascular Diseases ◽  
Intestinal Microbiota

scholarly journals Discovery of novel community-relevant small proteins in a simplified human intestinal microbiome

Microbiome ◽  
2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Hannes Petruschke ◽  
Christian Schori ◽  
Sebastian Canzler ◽  
Sarah Riesbeck ◽  
Anja Poehlein ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Intestinal Microbiota ◽  
De Novo ◽  
Bacterial Species ◽  
Intestinal Microbiome ◽  
Single Strain ◽  
Small Proteins ◽  
Human Intestinal Microbiota ◽  
Wide Range

Abstract Background The intestinal microbiota plays a crucial role in protecting the host from pathogenic microbes, modulating immunity and regulating metabolic processes. We studied the simplified human intestinal microbiota (SIHUMIx) consisting of eight bacterial species with a particular focus on the discovery of novel small proteins with less than 100 amino acids (= sProteins), some of which may contribute to shape the simplified human intestinal microbiota. Although sProteins carry out a wide range of important functions, they are still often missed in genome annotations, and little is known about their structure and function in individual microbes and especially in microbial communities. Results We created a multi-species integrated proteogenomics search database (iPtgxDB) to enable a comprehensive identification of novel sProteins. Six of the eight SIHUMIx species, for which no complete genomes were available, were sequenced and de novo assembled. Several proteomics approaches including two earlier optimized sProtein enrichment strategies were applied to specifically increase the chances for novel sProtein discovery. The search of tandem mass spectrometry (MS/MS) data against the multi-species iPtgxDB enabled the identification of 31 novel sProteins, of which the expression of 30 was supported by metatranscriptomics data. Using synthetic peptides, we were able to validate the expression of 25 novel sProteins. The comparison of sProtein expression in each single strain versus a multi-species community cultivation showed that six of these sProteins were only identified in the SIHUMIx community indicating a potentially important role of sProteins in the organization of microbial communities. Two of these novel sProteins have a potential antimicrobial function. Metabolic modelling revealed that a third sProtein is located in a genomic region encoding several enzymes relevant for the community metabolism within SIHUMIx. Conclusions We outline an integrated experimental and bioinformatics workflow for the discovery of novel sProteins in a simplified intestinal model system that can be generically applied to other microbial communities. The further analysis of novel sProteins uniquely expressed in the SIHUMIx multi-species community is expected to enable new insights into the role of sProteins on the functionality of bacterial communities such as those of the human intestinal tract.

scholarly journals A new biological triangle in cancer: intestinal microbiota, immune checkpoint inhibitors and antibiotics

2021 ◽  
Author(s):  
Jie Zhang ◽  
Zhujiang Dai ◽  
Cheng Yan ◽  
Wenjie Zhang ◽  
Daorong Wang ◽  
...  
Keyword(s):  
Intestinal Microbiota ◽  
Immune Checkpoint ◽  
Immune Checkpoint Inhibitors ◽  
Malignant Tumors ◽  
Checkpoint Inhibitors ◽  
Epidemiological Studies ◽  
Term Survival ◽  
Checkpoint Inhibitor Therapy ◽  
Rational Use Of Antibiotics

AbstractCancer immunotherapy has revolutionized the treatment of many malignant tumors. Although immune checkpoint inhibitors (ICIs) can reactivate the anti-tumor activity of immune cells, sensitivity to immune checkpoint inhibitor therapy depends on the complex tumor immune processes. In recent years, numerous researches have demonstrated the role of intestinal microbiota in immunity and metabolism of the tumor microenvironment, as well as the efficacy of immunotherapy. Epidemiological studies have further demonstrated the efficacy of antibiotic therapy on the probability of patients' response to ICIs and predictability of the short-term survival of cancer patients. Disturbance to the intestinal microbiota significantly affects ICIs-mediated immune reconstitution and is considered a possible mechanism underlying the development of adverse effects during antibiotic-based ICIs treatment. Intestinal microbiota, antibiotics, and ICIs have gradually become important considerations for the titer of immunotherapy. In the case of immunotherapy, the rational use of antibiotics and intestinal microbiota is expected to yield a better prognosis for patients with malignant tumors.

Clinical, cellular, and molecular characterisation of cardiac rhabdomyoma in tuberous sclerosis

2021 ◽  
pp. 1-9
Author(s):  
Hamood N. Al Kindi ◽  
Ayman M. Ibrahim ◽  
Mohamed Roshdy ◽  
Besra S. Abdelghany ◽  
Dina Yehia ◽  
...  
Keyword(s):  
Tuberous Sclerosis ◽  
Clinical Features ◽  
Tuberous Sclerosis Complex ◽  
Potential Role ◽  
Severe Disease ◽  
Cardiac Rhabdomyoma ◽  
Urgent Surgery ◽  
Pathogenic Mutations ◽  
Personalised Treatment

Abstract Background: Rhabdomyoma is the most common cardiac tumour in children. It is usually associated with tuberous sclerosis complex caused by mutations in TSC-1 or TSC-2 genes. This tumour typically regresses by unknown mechanisms; however, it may cause inflow or outflow obstruction that necessitates urgent surgery. Here we investigate the clinical features and the genetic analysis of patients with tuberous sclerosis complex presenting with large rhabdomyoma tumours. We also investigate the potential role of autophagy and apoptosis in the pathogenesis of this tumour. Methods: All the patients with cardiac rhabdomyoma referred to Aswan Heart Centre from 2010 to 2018 were included in this study. Sanger sequencing was performed for coding exons and the flanking intronic regions of TSC1 and TSC2 genes. Histopathological evaluation, immunohistochemistry, and western blotting were performed with P62, LC3b, caspase3, and caspase7, to evaluate autophagic and apoptotic signaling. Results: Five patients were included and had the clinical features of tuberous sclerosis complex. Three patients, who were having obstructive tumours, were found to have pathogenic mutations in TSC-2. The expression of two autophagic markers, P62 and LC3b, and two apoptotic markers, caspase3 and caspase7, were increased in the tumour cells compared to normal surrounding myocardial tissue. Conclusion: All the patients with rhabdomyoma were diagnosed to have tuberous sclerosis complex. The patients who had pathogenic mutations in the TSC-2 gene had a severe disease form necessitating urgent intervention. We also demonstrate the potential role of autophagy and apoptosis as a possible mechanism for tumourigenesis and regression. Future studies will help in designing personalised treatment for cardiac rhabdomyoma.

scholarly journals Intestinal Microbiota as an Alternative Therapeutic Target for Epilepsy

2016 ◽  
Vol 2016 ◽  
pp. 1-6 ◽  
Author(s):  
Jiaying Wu ◽  
Yuyu Zhang ◽  
Hongyu Yang ◽  
Yuefeng Rao ◽  
Jing Miao ◽  
...  
Keyword(s):  
Immune Responses ◽  
Intestinal Microbiota ◽  
Neurological Disorders ◽  
Digestive System ◽  
Hygiene Hypothesis ◽  
Host Susceptibility ◽  
Immune Disorders ◽  
The Central Nervous System ◽  
Symbiotic Microbiota

Epilepsy is one of the most widespread serious neurological disorders, and an aetiological explanation has not been fully identified. In recent decades, a growing body of evidence has highlighted the influential role of autoimmune mechanisms in the progression of epilepsy. The hygiene hypothesis draws people’s attention to the association between gut microbes and the onset of multiple immune disorders. It is also believed that, in addition to influencing digestive system function, symbiotic microbiota can bidirectionally and reversibly impact the programming of extraintestinal pathogenic immune responses during autoimmunity. Herein, we investigate the concept that the diversity of parasitifer sensitivity to commensal microbes and the specific constitution of the intestinal microbiota might impact host susceptibility to epilepsy through promotion of Th17 cell populations in the central nervous system (CNS).

scholarly journals A Review of the Role of the Intestinal Microbiota in Age-Related Macular Degeneration

2021 ◽  
Vol 10 (10) ◽  
pp. 2072
Author(s):  
Phoebe Lin ◽  
Scott M. McClintic ◽  
Urooba Nadeem ◽  
Dimitra Skondra
Keyword(s):  
Macular Degeneration ◽  
Intestinal Microbiota ◽  
Retinal Disease ◽  
Age Related Macular Degeneration ◽  
Intestinal Microbiome ◽  
Age Related ◽  
Intestinal Dysbiosis ◽  
Apo E ◽  
Dry Amd

Blindness from age-related macular degeneration (AMD) is an escalating problem, yet AMD pathogenesis is incompletely understood and treatments are limited. The intestinal microbiota is highly influential in ocular and extraocular diseases with inflammatory components, such as AMD. This article reviews data supporting the role of the intestinal microbiota in AMD pathogenesis. Multiple groups have found an intestinal dysbiosis in advanced AMD. There is growing evidence that environmental factors associated with AMD progression potentially work through the intestinal microbiota. A high-fat diet in apo-E-/- mice exacerbated wet and dry AMD features, presumably through changes in the intestinal microbiome, though other independent mechanisms related to lipid metabolism are also likely at play. AREDS supplementation reversed some adverse intestinal microbial changes in AMD patients. Part of the mechanism of intestinal microbial effects on retinal disease progression is via microbiota-induced microglial activation. The microbiota are at the intersection of genetics and AMD. Higher genetic risk was associated with lower intestinal bacterial diversity in AMD. Microbiota-induced metabolite production and gene expression occur in pathways important in AMD pathogenesis. These studies suggest a crucial link between the intestinal microbiota and AMD pathogenesis, thus providing a novel potential therapeutic target. Thus, the need for large longitudinal studies in patients and germ-free or gnotobiotic animal models has never been more pressing.

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