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Boletin Medico Del Hospital Infantil de... 2022Acne is a chronic inflammatory disease of the pilosebaceous unit with multifactorial etiology. Abnormal proliferation of keratinocytes, altered sebum production,... (Review)
Review
Acne is a chronic inflammatory disease of the pilosebaceous unit with multifactorial etiology. Abnormal proliferation of keratinocytes, altered sebum production, inflammation of the sebaceous follicle, and colonization by Cutibacterium acnes have been traditionally implicated. However, the diet has also been highlighted in the pathogenesis because of its direct relation with some biochemical markers and the transcription of specific genes associated with sebaceous gland activity, inflammation, and bacterial proliferation, which together promote the development of the disease, affect the severity of the condition, and modify its response to treatment.
Topics: Acne Vulgaris; Diet; Humans; Inflammation; Propionibacterium acnes; Sebum
PubMed: 35468121
DOI: 10.24875/BMHIM.21000088 -
Giornale Italiano Di Dermatologia E... Dec 2020Acne fulminans (AF) is a rare and severe form of inflammatory acne presenting clinically with an abrupt outburst of painful, hemorrhagic pustules and ulceration, that... (Review)
Review
Acne fulminans (AF) is a rare and severe form of inflammatory acne presenting clinically with an abrupt outburst of painful, hemorrhagic pustules and ulceration, that may or may not be associated with systemic symptoms, such as fever, polyarthritis, and laboratory abnormalities. It typically affects male teenagers with a pre-existing acne. Although the pathogenetic mechanism has not been established yet, a role of genetic, abnormal immunologic response, drugs intake, hormonal imbalance and viral infection, as causal factors, has been identified. AF may occur as a single disease or may be associated with other disorders. Traditionally, AF has been classified, on the basis of the presence of systemic involvement, in "acne fulminans" and acne fulminans "sine fulminans," when no systemic involvement is present. Recently, four clinical variants have been proposed: acne fulminans with systemic symptoms (AF-SS), acne fulminans without systemic symptoms (AF-WOSS), isotretinoin-induced acne fulminans with systemic symptoms (IIAF-SS), isotretinoin-induced acne fulminans without systemic symptoms (IIAF-WOSS). The diagnosis of AF is usually based on clinical history and physical examination. No specific laboratory abnormalities are generally found. In selected cases, biopsy and/or radiologic imaging are helpful for a correct diagnosis. The treatment significantly differs from severe acne according to severity of clinical presentation and possible systemic involvement. Currently, systemic corticosteroids (prednisolone) and retinoids (isotretinoin) represent the first choice of treatment. Dapsone, cyclosporine A, methotrexate, azathioprine, levamisole, and biological agents such as anakinra, infliximab, adalimumab may be considered as alternative therapies in selected cases. Adjunctive topical and physical therapies may also be considered.
Topics: Acne Vulgaris; Acquired Hyperostosis Syndrome; Adolescent; Adrenal Cortex Hormones; Adult; Androgens; Anti-Inflammatory Agents; Arthralgia; Combined Modality Therapy; Debridement; Dermatologic Agents; Diagnosis, Differential; Disease Progression; Female; Humans; Immunosuppressive Agents; Inflammation; Isotretinoin; Lasers, Dye; Low-Level Light Therapy; Male; Photochemotherapy; Propionibacteriaceae; Retinoids; Symptom Assessment; Young Adult
PubMed: 33084268
DOI: 10.23736/S0392-0488.20.06711-5 -
American Journal of Clinical Dermatology Sep 2020Our understanding of the role of Cutibacterium acnes in the pathophysiology of acne has recently undergone a paradigm shift: rather than C. acnes hyperproliferation, it... (Review)
Review
Our understanding of the role of Cutibacterium acnes in the pathophysiology of acne has recently undergone a paradigm shift: rather than C. acnes hyperproliferation, it is the loss of balance between the different C. acnes phylotypes, together with a dysbiosis of the skin microbiome, which results in acne development. The loss of diversity of C. acnes phylotypes acts as a trigger for innate immune system activation, leading to cutaneous inflammation. A predominance of C. acnes phylotype IA has been observed, with a more virulent profile in acne than in normal skin. Other bacteria, mainly Staphylococcus epidermis, are also implicated in acne. S. epidermidis and C. acnes interact and are critical for the regulation of skin homeostasis. Recent studies also showed that the gut microbiome is involved in acne, through interactions with the skin microbiome. As commonly used topical and systemic antibiotics induce cutaneous dysbiosis, our new understanding of acne pathophysiology has prompted a change in direction for acne treatment. In the future, the development of individualized acne therapies will allow targeting of the pathogenic strains, leaving the commensal strains intact. Such alternative treatments, involving modifications of the microbiome, will form the next generation of 'ecobiological' anti-inflammatory treatments.
Topics: Acne Vulgaris; Anti-Bacterial Agents; Anti-Inflammatory Agents; Dysbiosis; Humans; Immunity, Innate; Microbiota; Propionibacterium acnes; Skin; Symbiosis
PubMed: 32910436
DOI: 10.1007/s40257-020-00531-1 -
The Yale Journal of Biology and Medicine Dec 2022Antimicrobial resistance is an increasing public health problem worldwide. The interest of a focus on antimicrobial resistance in acne lies on the facts that acne... (Review)
Review
Antimicrobial resistance is an increasing public health problem worldwide. The interest of a focus on antimicrobial resistance in acne lies on the facts that acne vulgaris (acne) is the most common skin disease worldwide, that the bacterium (, formerly ) plays a key role in the pathogenesis of acne, while at the same time being part of the skin flora, and that antibiotics are commonly recommended for acne treatment. The overuse of topical and/or systemic antibiotics, the long treatment courses used for acne, and the availability of over-the-counter antibiotic preparations, have led to the worldwide emergence of resistant strains in acne patients. In this review, we discuss the epidemiological trends of antimicrobial resistance in acne, the need to avoid the perturbation of the skin microbiome caused by anti-acne antibiotics, and the clinical practice considerations related to the emergence of resistant strains in acne patients. In light of the increasing risk of antimicrobial resistance, raising concerns over the misuse of antibiotics, prescribing patterns can be a critical target for antibiotic stewardship efforts. Also, the selection of non-antibiotic therapies for acne, whenever possible, may offer significant advantages.
Topics: Humans; Anti-Bacterial Agents; Drug Resistance, Bacterial; Acne Vulgaris; Skin; Propionibacterium acnes
PubMed: 36568833
DOI: No ID Found -
Science Translational Medicine Feb 2022Innate immune defense against deep tissue infection by is orchestrated by fibroblasts that become antimicrobial when triggered to differentiate into adipocytes....
Innate immune defense against deep tissue infection by is orchestrated by fibroblasts that become antimicrobial when triggered to differentiate into adipocytes. However, the role of this process in noninfectious human diseases is unknown. To investigate the potential role of adipogenesis by dermal fibroblasts in acne, a disorder triggered by , single-cell RNA sequencing was performed on human acne lesions and mouse skin challenged by . A transcriptome consistent with adipogenesis was observed within specific fibroblast subsets from human acne and mouse skin lesions infected with . Perifollicular dermal preadipocytes in human acne and mouse skin lesions showed colocalization of PREF1, an early marker of adipogenesis, and cathelicidin (), an antimicrobial peptide. This capacity of to specifically trigger production of cathelicidin in preadipocytes was dependent on TLR2. Treatment of wild-type mice with retinoic acid (RA) suppressed the capacity of to form acne-like lesions, inhibited adipogenesis, and enhanced cathelicidin expression in preadipocytes, but lesions were unresponsive in mice, despite the anti-adipogenic action of RA. Analysis of inflamed skin of acne patients after retinoid treatment also showed enhanced induction of cathelicidin, a previously unknown beneficial effect of retinoids in difficult-to-treat acne. Overall, these data provide evidence that adipogenic fibroblasts are a critical component of the pathogenesis of acne and represent a potential target for therapy.
Topics: Acne Vulgaris; Animals; Anti-Bacterial Agents; Anti-Infective Agents; Humans; Mice; Propionibacterium acnes; Skin Diseases; Staphylococcus aureus; Tretinoin
PubMed: 35171653
DOI: 10.1126/scitranslmed.abh1478 -
International Journal of Medical... 2021Bacteria response to their environment by producing some compounds which are used in cosmetic and pharmaceutical applications. Some probiotics can regulate immune... (Randomized Controlled Trial)
Randomized Controlled Trial
Bacteria response to their environment by producing some compounds which are used in cosmetic and pharmaceutical applications. Some probiotics can regulate immune response and modulate the symptoms of several diseases. Bacteria affect skin response to skin care products. Bacteria are thought to play an important role in acne incidence, skin moisture, and nutrient metabolism, but only a few studies have focused on the extracts of in skin care. In this study, we identified that GMNL6 enhanced collagen synthesis and the gene expression of serine palmitoyltransferase small subunit A. Meanwhile, GMNL6 reduced the melanin synthesis, the biofilm of , and the proliferation of Information from clinical observation during the ointment for external face use in people displayed that the syndromes of skin moisture, skin color, spots, wrinkles, UV spots, and porphyrins were improved. The diversification of human skin microbiomes was affected by smearing the face of volunteers with -GMNL6. Understanding the potential mechanisms of the action of -GMNL6 in dermatologic conditions promotes the development of care products.
Topics: Adult; Animals; Biofilms; Cell Line, Tumor; Collagen; Female; Fibroblasts; Humans; Lactobacillus plantarum; Male; Mice; Microbiota; Middle Aged; Ointments; Probiotics; Propionibacteriaceae; Skin; Skin Care; Staphylococcus aureus; Treatment Outcome; Young Adult
PubMed: 33526970
DOI: 10.7150/ijms.51545 -
Circulation Journal : Official Journal... Oct 2019
Topics: Adrenal Cortex Hormones; Adult; Antimalarials; Cardiomyopathies; Early Diagnosis; Female; Genetic Predisposition to Disease; Gram-Positive Bacterial Infections; Humans; Immunosuppressive Agents; Incidence; Japan; Male; Middle Aged; Polymorphism, Single Nucleotide; Prevalence; Propionibacterium acnes; Sarcoidosis, Pulmonary; Young Adult
PubMed: 31597819
DOI: 10.1253/circj.CJ-19-0508 -
Journal of Microbiology and... Nov 2022Acne is a chronic inflammatory disease of the sebaceous gland attached to the hair follicles. is a major cause of inflammation caused by acne. It is well known that...
Acne is a chronic inflammatory disease of the sebaceous gland attached to the hair follicles. is a major cause of inflammation caused by acne. It is well known that secretes a lipolytic enzyme to break down lipids in sebum, and free fatty acids produced at this time accelerate the inflammatory reaction. There are several drugs used to treat acne; however, each one has various side effects. According to previous studies, sulforaphene (SFEN) has several functions associated with lipid metabolism, brain function, and antibacterial and anti-inflammatory activities. In this study, we examined the effects of SFEN on bacterial growth and inflammatory cytokine production induced by . The results revealed that SFEN reduced the growth of and inhibited proinflammatory cytokines in -treated HaCaT keratinocytes through inhibiting NF-κB-related pathways. In addition, SFEN regulated the expression level of IL-1α, a representative pro-inflammatory cytokine expressed in co-cultured HaCaT keratinocytes and THP-1 monocytes induced by . In conclusion, SFEN showed antibacterial activity against and controlled the inflammatory response on keratinocytes and monocytes. This finding means that SFEN has potential as both a cosmetic material for acne prevention and a pharmaceutical material for acne treatment.
Topics: Humans; Propionibacterium acnes; Inflammation; Acne Vulgaris; Anti-Bacterial Agents
PubMed: 36437519
DOI: 10.4014/jmb.2209.09051 -
Nature Communications Dec 2023Acne is a dermatologic disease with a strong pathologic association with human commensal Cutibacterium acnes. Conspicuously, certain C. acnes phylotypes are associated...
Acne is a dermatologic disease with a strong pathologic association with human commensal Cutibacterium acnes. Conspicuously, certain C. acnes phylotypes are associated with acne, whereas others are associated with healthy skin. Here we investigate if the evolution of a C. acnes enzyme contributes to health or acne. Two hyaluronidase variants exclusively expressed by C. acnes strains, HylA and HylB, demonstrate remarkable clinical correlation with acne or health. We show that HylA is strongly pro-inflammatory, and HylB is modestly anti-inflammatory in a murine (female) acne model. Structural and phylogenic studies suggest that the enzymes evolved from a common hyaluronidase that acquired distinct enzymatic activity. Health-associated HylB degrades hyaluronic acid (HA) exclusively to HA disaccharides leading to reduced inflammation, whereas HylA generates large-sized HA fragments that drive robust TLR2-dependent pathology. Replacing an amino acid, Serine to Glycine near the HylA catalytic site enhances the enzymatic activity of HylA and produces an HA degradation pattern intermediate to HylA and HylB. Selective targeting of HylA using peptide vaccine or inhibitors alleviates acne pathology. We suggest that the functional divergence of HylA and HylB is a major driving force behind C. acnes health- and acne- phenotype and propose targeting of HylA as an approach for acne therapy.
Topics: Humans; Female; Animals; Mice; Hyaluronoglucosaminidase; Skin; Acne Vulgaris; Propionibacterium acnes; Amino Acids
PubMed: 38052825
DOI: 10.1038/s41467-023-43833-8 -
MSphere Jan 2020Porphyrins are intermediate metabolites in the biosynthesis of vital molecules, including heme, cobalamin, and chlorophyll. Bacterial porphyrins are known to be... (Comparative Study)
Comparative Study
Porphyrins are intermediate metabolites in the biosynthesis of vital molecules, including heme, cobalamin, and chlorophyll. Bacterial porphyrins are known to be proinflammatory, with high levels linked to inflammatory skin diseases. species are dominant skin commensals and play essential roles in defending against pathogens and in triggering an inflammatory response. To better understand how the inflammatory potential of the skin microbiome may vary depending on its propionibacterial composition, we compared the production levels of porphyrins among , , , and strains. We found that porphyrin production varied among these species, with type I strains producing significantly larger amounts of porphyrins than type II and III strains and other species. strains that are highly associated with the common skin condition acne vulgaris responded to vitamin B supplementation with significantly higher porphyrin production. In contrast, vitamin B supplementation had no effect on the porphyrin production of health-associated strains and other propionibacteria. We observed low-level porphyrin production in most strains harboring the repressor gene, with the exception of strains belonging to type I clades IB-3 and IC. Our findings shed light on the proinflammatory potential of distinct phylogenetic lineages of as well as other resident skin propionibacteria. We demonstrate that the overall species and strain composition is important in determining the metabolic output of the skin microbiome in health and disease. Porphyrins are a group of metabolites essential to the biosynthesis of heme, cobalamin, and chlorophyll in living organisms. Bacterial porphyrins can be proinflammatory, with high levels linked to human inflammatory diseases, including the common skin condition acne vulgaris. Propionibacteria are among the most abundant skin bacteria. Variations in propionibacteria composition on the skin may lead to different porphyrin levels and inflammatory potentials. This study characterized porphyrin production in all lineages of , the most dominant skin , and other resident skin propionibacteria, including , , and We revealed that type I strains produced significantly more porphyrins than did type II and III strains and other species. The findings from this study shed light on the proinflammatory potential of the skin microbiome and can be used to guide the development of effective acne treatments by modulating the skin microbiome and its metabolic activities.
Topics: Humans; Microbiota; Phylogeny; Porphyrins; Propionibacteriaceae; Propionibacterium; Propionibacterium acnes; Skin
PubMed: 31941813
DOI: 10.1128/mSphere.00793-19