scholarly journals Gut–Skin Axis: Current Knowledge of the Interrelationship between Microbial Dysbiosis and Skin Conditions

2021 ◽  
Vol 9 (2) ◽  
pp. 353
Author(s):  
Britta De Pessemier ◽  
Lynda Grine ◽  
Melanie Debaere ◽  
Aglaya Maes ◽  
Bernhard Paetzold ◽  
...  
Keyword(s):  
Gut Microbiome ◽  
Skin Diseases ◽  
Current Knowledge ◽  
Acne Vulgaris ◽  
Skin Microbiome ◽  
Local Skin ◽  
Microbial Dysbiosis ◽  
New Therapeutic Approaches ◽  
Skin Conditions ◽  
Underlying Mechanisms

The microbiome plays an important role in a wide variety of skin disorders. Not only is the skin microbiome altered, but also surprisingly many skin diseases are accompanied by an altered gut microbiome. The microbiome is a key regulator for the immune system, as it aims to maintain homeostasis by communicating with tissues and organs in a bidirectional manner. Hence, dysbiosis in the skin and/or gut microbiome is associated with an altered immune response, promoting the development of skin diseases, such as atopic dermatitis, psoriasis, acne vulgaris, dandruff, and even skin cancer. Here, we focus on the associations between the microbiome, diet, metabolites, and immune responses in skin pathologies. This review describes an exhaustive list of common skin conditions with associated dysbiosis in the skin microbiome as well as the current body of evidence on gut microbiome dysbiosis, dietary links, and their interplay with skin conditions. An enhanced understanding of the local skin and gut microbiome including the underlying mechanisms is necessary to shed light on the microbial involvement in human skin diseases and to develop new therapeutic approaches.

Viral and Nonviral Uses of Imiquimod: A Review

2004 ◽  
Vol 8 (5) ◽  
pp. 338-352 ◽  
Author(s):  
Aditya K. Gupta ◽  
Andrea M. Cherman ◽  
Stephen K. Tyring
Keyword(s):  
Basal Cell Carcinoma ◽  
Cell Carcinoma ◽  
Basal Cell ◽  
Skin Diseases ◽  
Interleukin 12 ◽  
Antitumor Effects ◽  
Skin Reactions ◽  
Local Skin ◽  
Actinic Keratoses ◽  
Skin Conditions

Background: Imiquimod is a topical immunomodulator that is indicated for the treatment of external genital and perianal warts. This drug has been recently approved for the treatment of actinic keratoses and superficial basal cell carcinoma. There is a growing body of evidence for its effectiveness in treating a variety of other skin conditions. Objective: This review examines the role of imiquimod 5% cream in the treatment of skin diseases such as actinic keratoses, basal cell carcinoma, Bowen's disease, lentigo maligna, and extramammary Paget's disease. Methods: Published literature containing the words “Imiquimod” or “Aldara” was reviewed and summarized. Results: This agent has demonstrated indirect antiviral and antitumor effects in animal models. Although the exact mechanism of action is unknown, imiquimod is an agonist for toll-like receptor (TLR) 7 and is thought to act by inducing cytokines, such as interferon alpha (IFN-α), interleukin-12 (IL-12), and tumor necrosis factor alpha (TNF-α). These cytokines trigger the immune system to recognize the presence of a viral infection or tumor and the associated lesion is ultimately eradicated. Side effects are generally well tolerated with local skin reactions reported most frequently. Conclusion: Imiquimod has been shown to be a safe and effective treatment for a variety of skin conditions.

scholarly journals The Virtual Metabolic Human database: integrating human and gut microbiome metabolism with nutrition and disease

2018 ◽  
Author(s):  
Alberto Noronha ◽  
Jennifer Modamio ◽  
Yohan Jarosz ◽  
Nicolas Sompairac ◽  
German Preciat Gonzàlez ◽  
...  
Keyword(s):  
Gut Microbiome ◽  
Current Knowledge ◽  
Application Programming Interface ◽  
Data Interpretation ◽  
Human Metabolism ◽  
Human Genes ◽  
Application Programming ◽  
Underlying Mechanisms ◽  
User Friendly ◽  
Programming Interface

AbstractA multitude of factors contribute to complex diseases and can be measured with “omics” methods. Databases facilitate data interpretation for underlying mechanisms. Here, we describe the Virtual Metabolic Human (VMH, http://vmh.life) database encapsulating current knowledge of human metabolism within five interlinked resources “Human metabolism”, “Gut microbiome”, “Disease”, “Nutrition”, and “ReconMaps”. The VMH captures 5,180 unique metabolites, 17,730 unique reactions, 3,288 human genes, 255 Mendelian diseases, 818 microbes, 632,685 microbial genes, and 8,790 food items. The VMH’s unique features are i) the hosting the metabolic reconstructions of human and gut microbes amenable for metabolic modeling; ii) seven human metabolic maps for data visualization; iii) a nutrition designer; iv) a user-friendly webpage and application-programming interface to access its content; and v) user feedback option for community engagement. We demonstrate with four examples the VMH’s utility. The VMH represents a novel, interdisciplinary database for data interpretation and hypothesis generation to the biomedical community.

Gut microbiome skin axis in the development of atopic dermatitis

2021 ◽  
pp. 1-6
Author(s):  
Hitham Abduarhman Alghamdi ◽  
Ahmed Behieldin ◽  
Sherif Edris
Keyword(s):  
Staphylococcus Aureus ◽  
Atopic Dermatitis ◽  
Gut Microbiome ◽  
Early Life ◽  
Skin Diseases ◽  
Skin Microbiome ◽  
Healthy Skin ◽  
Immunological Activity ◽  
Bacterial Composition ◽  
Strong Relation

Abstract Atopic dermatitis (AD) is the main focus of this review which mostly starts with children in early life. Beside the etiological factors like environmental, dietary or medical exposures, Gut-skin axis microbiome studies have an impact to investigate and to understand the relation between the gut microbiome and changes to the skin microbiom and some skin diseases resulting like AD. Infants start forming their microbiome in early life and some researches suggest that this time have a crucial role in development of AD. Balanced bacterial composition is important to maintain healthy skin as the gut microbiome dysbiosis may result in dramatic shifting in the skin microbiome that gives better chance for some bacteria such as Staphylococcus aureus to over prevail which has been reported to contribute in AD development. Among several factors, immunological activity has a strong relation to microbiome changed composition and development of AD. Continuous....  

The role of lactobacilli in inhibiting skin pathogens

2021 ◽  
Author(s):  
Lize Delanghe ◽  
Irina Spacova ◽  
Joke Van Malderen ◽  
Eline Oerlemans ◽  
Ingmar Claes ◽  
...  
Keyword(s):  
Clinical Trials ◽  
Skin Diseases ◽  
Skin Barrier Function ◽  
Skin Microbiome ◽  
Inflammatory Skin Diseases ◽  
Cutibacterium Acnes ◽  
Inflammatory Skin ◽  
Skin Conditions

The human skin microbiota forms a key barrier against skin pathogens and is important in modulating immune responses. Recent studies identify lactobacilli as endogenous inhabitants of healthy skin, while inflammatory skin conditions are often associated with a disturbed skin microbiome. Consequently, lactobacilli-based probiotics are explored as a novel treatment of inflammatory skin conditions through their topical skin application. This review focuses on the potential beneficial role of lactobacilli (family Lactobacillaceae) in the skin habitat, where they can exert multifactorial local mechanisms of action against pathogens and inflammation. On one hand, lactobacilli have been shown to directly compete with skin pathogens through adhesion inhibition, production of antimicrobial metabolites, and by influencing pathogen metabolism. The competitive anti-pathogenic action of lactobacilli has already been described mechanistically for common different skin pathogens, such as Staphylococcus aureus, Cutibacterium acnes, and Candida albicans. On the other hand, lactobacilli also have an immunomodulatory capacity associated with a reduction in excessive skin inflammation. Their influence on the immune system is mediated by bacterial metabolites and cell wall-associated or excreted microbe-associated molecular patterns (MAMPs). In addition, lactobacilli can also enhance the skin barrier function, which is often disrupted as a result of infection or in inflammatory skin diseases. Some clinical trials have already translated these mechanistic insights into beneficial clinical outcomes, showing that topically applied lactobacilli can temporarily colonize the skin and promote skin health, but more and larger clinical trials are required to generate in vivo mechanistic insights and in-depth skin microbiome analysis.

scholarly journals The Role of Gut Microbiome in Psoriasis: Oral Administration of Staphylococcus aureus and Streptococcus danieliae Exacerbates Skin Inflammation of Imiquimod-Induced Psoriasis-Like Dermatitis

2020 ◽  
Vol 21 (9) ◽  
pp. 3303 ◽  
Author(s):  
Karin Okada ◽  
Yoshiaki Matsushima ◽  
Kento Mizutani ◽  
Keiichi Yamanaka
Keyword(s):  
Gut Microbiome ◽  
Skin Diseases ◽  
Skin Inflammation ◽  
Gut Bacteria ◽  
Rrna Gene ◽  
Skin Microbiome ◽  
Inflammatory Skin Diseases ◽  
Fecal Microbiome ◽  
Tnf Α ◽  
Inflammatory Skin

Psoriasis is one of the common chronic inflammatory skin diseases in which inflammatory cytokines such as IL-17 and TNF-α play critical roles. Skin microbiome of psoriasis patients is reported to have elevated Staphylococcus and Streptococcus genus. There are controversial reports about gut microbiome of psoriasis patients, and whether the diversity of bacteria in genus level is decreased or not is still unclear. Moreover, it is not yet known if these gut bacteria would be the cause of the inflammation or the result of the inflammation. We analyzed the gut microbiome of the inflammatory skin model mouse (keratinocyte-specific caspase-1 transgenic (Kcasp1Tg) mouse), by analyzing the 16S rRNA gene. Staphylocuccus aureus and Streptococcus danieliae were abundant in Kcasp1Tg mouse fecal microbiome. These dominant bacteria as well as recessive control bacteria were orally administrated to antibiotic-treated wild type mice, and set up imiquimod-induced psoriasis-like skin inflammation model. The skin inflammation including ear thickness and histopathological findings was analyzed. The exacerbated skin lesions with the elevated levels of TNF-α, IL-17A, IL-17F, and IL-22 were observed in Staphylocuccus aureus and Streptococcus danieliae administrated groups. Our finding suggests that there is affinity between skin inflammation severity and certain gut bacteria leading to a vicious cycle: skin inflammation populates certain gut bacteria which itself worsens the skin inflammation. This is the first report on Staphylocuccus aureus and Streptococcuus danieliae effects in vivo. Not only treating the skin lesion but also treating the gut microbiome could be the future key treatment for inflammatory skin disease such as psoriasis.

scholarly journals Propionibacterium acnes and Acne Vulgaris: New Insights from the Integration of Population Genetic, Multi-Omic, Biochemical and Host-Microbe Studies

2019 ◽  
Vol 7 (5) ◽  
pp. 128 ◽  
Author(s):  
Joseph McLaughlin ◽  
Steven Watterson ◽  
Alison M. Layton ◽  
Anthony J. Bjourson ◽  
Emma Barnard ◽  
...  
Keyword(s):  
Propionibacterium Acnes ◽  
Current Knowledge ◽  
Acne Vulgaris ◽  
Therapeutic Strategies ◽  
Metagenomic Data ◽  
Skin Microbiome ◽  
Common Skin ◽  
Intraspecies Diversity ◽  
The Common ◽  
Sequence Types

The anaerobic bacterium Propionibacterium acnes is believed to play an important role in the pathophysiology of the common skin disease acne vulgaris. Over the last 10 years our understanding of the taxonomic and intraspecies diversity of this bacterium has increased tremendously, and with it the realisation that particular strains are associated with skin health while others appear related to disease. This extensive review will cover our current knowledge regarding the association of P. acnes phylogroups, clonal complexes and sequence types with acne vulgaris based on multilocus sequence typing of isolates, and direct ribotyping of the P. acnes strain population in skin microbiome samples based on 16S rDNA metagenomic data. We will also consider how multi-omic and biochemical studies have facilitated our understanding of P. acnes pathogenicity and interactions with the host, thus providing insights into why certain lineages appear to have a heightened capacity to contribute to acne vulgaris development, while others are positively associated with skin health. We conclude with a discussion of new therapeutic strategies that are currently under investigation for acne vulgaris, including vaccination, and consider the potential of these treatments to also perturb beneficial lineages of P. acnes on the skin.

scholarly journals The Virtual Metabolic Human database: integrating human and gut microbiome metabolism with nutrition and disease

2018 ◽  
Vol 47 (D1) ◽  
pp. D614-D624 ◽  
Author(s):  
Alberto Noronha ◽  
Jennifer Modamio ◽  
Yohan Jarosz ◽  
Elisabeth Guerard ◽  
Nicolas Sompairac ◽  
...  
Keyword(s):  
Gut Microbiome ◽  
Current Knowledge ◽  
Application Programming Interface ◽  
Data Interpretation ◽  
Human Metabolism ◽  
Human Genes ◽  
Application Programming ◽  
Underlying Mechanisms ◽  
User Friendly ◽  
Programming Interface

Abstract A multitude of factors contribute to complex diseases and can be measured with ‘omics’ methods. Databases facilitate data interpretation for underlying mechanisms. Here, we describe the Virtual Metabolic Human (VMH, www.vmh.life) database encapsulating current knowledge of human metabolism within five interlinked resources ‘Human metabolism’, ‘Gut microbiome’, ‘Disease’, ‘Nutrition’, and ‘ReconMaps’. The VMH captures 5180 unique metabolites, 17 730 unique reactions, 3695 human genes, 255 Mendelian diseases, 818 microbes, 632 685 microbial genes and 8790 food items. The VMH’s unique features are (i) the hosting of the metabolic reconstructions of human and gut microbes amenable for metabolic modeling; (ii) seven human metabolic maps for data visualization; (iii) a nutrition designer; (iv) a user-friendly webpage and application-programming interface to access its content; (v) user feedback option for community engagement and (vi) the connection of its entities to 57 other web resources. The VMH represents a novel, interdisciplinary database for data interpretation and hypothesis generation to the biomedical community.

scholarly journals VITAMIN A DERIVATIVES USE IN THE TREATMENT OF SKIN CONDITIONS

2020 ◽  
pp. 9-12
Author(s):  
MOHAMMED AL-ABADIE ◽  
FARIS OUMEISH ◽  
MOHAMMED AL-RUBAYE ◽  
SHAHID RAFIQ ◽  
PATRICK ANTHONY BALL ◽  
...  
Keyword(s):  
Vitamin A ◽  
Skin Diseases ◽  
Acne Vulgaris ◽  
Kaposi Sarcoma ◽  
Severity Index ◽  
Similar Efficacy ◽  
Hand Eczema ◽  
Chronic Hand Eczema ◽  
Skin Conditions ◽  
The Impact

Retinoids are used to treat various skin diseases. They add valuable impact of when used early in the treatment of dermatological conditions. Overall vitamin A derivatives are underused, with isotretinoin is the most used. This paper aims to develop prescribers’ knowledge about their benefits, to improve their usability and aids in alleviating patient concerns to improve therapeutic outcomes in dermatological conditions. In acne vulgaris, adapalene gel and tretinoin cream showed equal efficacy. In psoriasis the combination of acitretin and PUVA was superior to PUVA alone. Acitretin showed a reduction of 41% in the Nail Psoriasis Severity Index and similar efficacy to potent steroids and calcipotriol. In chronic hand eczema, alitretinoin showed 50% improvement in patient’s refractory to steroid treatment. In photoaging and aging, retinoids were shown to increase the synthesis and decrease the degradation rate of collagen and hyaluronate, reducing the impact of aging. In rosacea, topical and systemic isotretinoin showed complete remission in 24% of the patients compared to only 14 % with antibiotics (metronidazole and doxycycline). In lichen planus, isotretinoin demonstrated clinical and histopathological efficacy. In cutaneous T-cell lymphoma, bexarotene used alone or with PUVA or narrow band UVB, showed a response between 80.0% to 84.0%. Lastly in Kaposi sarcoma alitretinoin gel showed superiority to all other agents and better tolerance. This review highlights the benefit of timely use of vitamin A derivatives to encourage wider use.

Investigating Personality and Psychopathology in Patients With Psoriasis

2017 ◽  
Vol 38 (2) ◽  
pp. 87-107 ◽  
Author(s):  
Chiara Vari ◽  
Patrizia Velotti ◽  
Alessandro Crisi ◽  
Silvana Carlesimo ◽  
Antonio G. Richetta ◽  
...  
Keyword(s):  
Skin Diseases ◽  
Clinical Importance ◽  
Self Report ◽  
Psychological Issues ◽  
Self Evaluation ◽  
Affective Quality ◽  
Millon Clinical Multiaxial Inventory ◽  
Study Results ◽  
Completion Test ◽  
Skin Conditions

Abstract. A broad range of literature reported higher rates of psychopathology and personality disorders among patients affected by skin conditions. Specifically, depression, anxiety, and suicidal ideations are more frequently reported by patients affected by skin diseases. This study aimed to examine psychopathology and personality in a group of patients affected by psoriasis by means of a self-report measure (Millon Clinical Multiaxial Inventory – MCMI-III) and a performance-based technique (Wartegg Drawing Completion Test [WDCT], CWS). Study results showed a higher rate of passive-aggressiveness and paranoia among psoriatic patients (MCMI-III). When assessing patients through the performance-based technique (WDCT, CWS), a higher rate of global rejection (GR) – linked by previous literature to suicidal ideation – and a lower affective quality of the drawings emerged. We discuss the clinical importance of detecting psychological issues in dermatology patients by means of a multimethod assessment that goes beyond patients’ self-evaluation of their symptoms and emotions.

Ion Channel Remodelling in Atrial Fibrillation

2011 ◽  
Vol 7 (2) ◽  
pp. 97 ◽  
Author(s):  
Niels Voigt ◽  
Dobromir Dobrev ◽  
◽  
Keyword(s):  
Atrial Fibrillation ◽  
Ion Channel ◽  
Antiarrhythmic Drugs ◽  
Current Knowledge ◽  
Bleeding Complications ◽  
Large Size ◽  
Cardiovascular Morbidity And Mortality ◽  
Number Of Patients ◽  
Life Threatening ◽  
Underlying Mechanisms

Atrial fibrillation (AF) is the most common arrhythmia and is associated with substantial cardiovascular morbidity and mortality, with stroke being the most critical complication. Present drugs used for the therapy of AF (antiarrhythmics and anticoagulants) have major limitations, including incomplete efficacy, risks of life-threatening proarrhythmic events and bleeding complications. Non-pharmacological ablation procedures are efficient and apparently safe, but the very large size of the patient population allows ablation treatment of only a small number of patients. These limitations largely result from limited knowledge about the underlying mechanisms of AF and there is a hope that a better understanding of the molecular basis of AF may lead to the discovery of safer and more effective therapeutic targets. This article reviews the current knowledge about AF-related ion-channel remodelling and discusses how these alterations might affect the efficacy of antiarrhythmic drugs.

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