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Advances in Experimental Medicine and... 2022Acne vulgaris results from a complex interaction between environment and genetic factors. While colonization of the pilosebaceous unit with Propionibacterium was...
Acne vulgaris results from a complex interaction between environment and genetic factors. While colonization of the pilosebaceous unit with Propionibacterium was previously considered to be the main cause of acne, the contribution of host-related factors that allow the growth of the bacteria and its immune response against bacterial components are now considered to be more important. Many of these host characteristics have a genetic base that is either involved in the regulation of the immune responses or the steroid hormones metabolisms. This chapter aims to explore the functions of these genes and their role in the pathogenesis of acne.
Topics: Acne Vulgaris; Humans; Immunogenetics; Propionibacterium acnes; Skin
PubMed: 35286695
DOI: 10.1007/978-3-030-92616-8_6 -
The New England Journal of Medicine Sep 2021
Topics: Anti-Bacterial Agents; Clavicle; Deglutition Disorders; Diagnosis, Differential; Female; Humans; Lemierre Syndrome; Lung; Pain; Propionibacteriaceae; Thrombocytopenia; Tomography, X-Ray Computed; Young Adult
PubMed: 34587389
DOI: 10.1056/NEJMimc2103214 -
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 -
The British Journal of Dermatology Oct 2019The role of skin microbiota in acne remains to be fully elucidated. Initial culture-based investigations were hampered by growth rate and selective media bias. Even with... (Review)
Review
BACKGROUND
The role of skin microbiota in acne remains to be fully elucidated. Initial culture-based investigations were hampered by growth rate and selective media bias. Even with less biased genomic methods, sampling, lysis and methodology, the task of describing acne pathophysiology remains challenging. Acne occurs in sites dominated by Cutibacterium acnes (formerly Propionibacterium acnes) and Malassezia species, both of which can function either as commensal or pathogen.
OBJECTIVES
This article aims to review the current state of the art of the microbiome and acne.
METHODS
The literature regarding the microbiome and acne was reviewed.
RESULTS
It remains unclear whether there is a quantitative difference in microbial community distribution, making it challenging to understand any community shift from commensal to pathogenic nature. It is plausible that acne involves (i) change in the distribution of species/strains, (ii) stable distribution with pathogenic alteration in response to internal (intermicrobe) or external stimuli (host physiology or environmental) or (iii) a combination of these factors.
CONCLUSIONS
Understanding physiological changes in bacterial species and strains will be required to define their specific roles, and identify any potential intervention points, in acne pathogenesis and treatment. It will also be necessary to determine whether any fungal species are involved, and establish whether they play a significant role. Further investigation using robust, modern analytic tools in longitudinal studies with a large number of participants, may make it possible to determine whether the microbiota plays a causal role, is primarily involved in exacerbation, or is merely a bystander. It is likely that the final outcome will show that acne is the result of complex microbe-microbe and community-host interplay.
Topics: Acne Vulgaris; Humans; Malassezia; Microbiota; Propionibacterium acnes; Skin; Symbiosis
PubMed: 31342510
DOI: 10.1111/bjd.18230 -
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 -
Journal of Drugs in Dermatology : JDD Mar 2015As the pathophysiology of acne is complex and multifactorial, the continued influx of new basic science and clinical information requires careful analysis before drawing... (Review)
Review
As the pathophysiology of acne is complex and multifactorial, the continued influx of new basic science and clinical information requires careful analysis before drawing conclusions about what truly contributes to the development and progression of this chronic disease. Our objective is to review the latest evidence and highlight a number of important perspectives on the pathophysiology of acne. An improved understanding of acne pathogenesis should lead to more rational therapy and a better understanding of the role of P acnes opens new perspectives for the development of new treatments and management. Further research may be directed at targeting receptors, adhesion molecules, cytokines, chemokines or other pro-inflammatory targets implicated in the activation of immune detection and response (i.e., toll-like receptors [TLRs], protease-activated receptors [PARs]) that appear to contribute to the pathophysiology of acne. Therapeutic options that reduce the need for topical and/or oral antibiotic therapy for acne are welcome as bacterial resistance to antibiotics is a clinically relevant concern both in the United States and globally.
Topics: Acne Vulgaris; Anti-Bacterial Agents; Dermatologic Agents; Humans; Oxidative Stress; Propionibacterium acnes; Sebum
PubMed: 25738848
DOI: No ID Found -
Italian Journal of Dermatology and... Dec 2021
Topics: Acne Vulgaris; Humans; Immunity, Humoral; Propionibacterium acnes
PubMed: 32129051
DOI: 10.23736/S2784-8671.20.06475-5 -
The Journal of Investigative Dermatology Jun 2024Human hair follicles (HFs) constitute a unique microbiota habitat that differs substantially from the skin surface. Traditional HF sampling methods fail to eliminate...
Human hair follicles (HFs) constitute a unique microbiota habitat that differs substantially from the skin surface. Traditional HF sampling methods fail to eliminate skin microbiota contaminants or assess the HF microbiota incompletely, and microbiota functions in human HF physiology remain ill explored. Therefore, we used laser-capture microdissection, metagenomic shotgun sequencing, and FISH to characterize the human scalp HF microbiota in defined anatomical compartments. This revealed significant compartment-, tissue lineage-, and donor age-dependent variations in microbiota composition. Greatest abundance variations between HF compartments were observed for viruses, archaea, Staphylococcus epidermidis, Cutibacterium acnes, and Malassezia restricta, with the latter 2 being the most abundant viable HF colonizers (as tested by propidium monoazide assay) and, surprisingly, most abundant in the HF mesenchyme. Transfection of organ-cultured human scalp HFs with S. epidermidis-specific lytic bacteriophages ex vivo downregulated transcription of genes known to regulate HF growth and development, metabolism, and melanogenesis, suggesting that selected microbial products may modulate HF functions. Indeed, HF treatment with butyrate, a metabolite of S. epidermidis and other HF microbiota, delayed catagen and promoted autophagy, mitochondrial activity, and gp100 and dermcidin expression ex vivo. Thus, human HF microbiota show spatial variations in abundance and modulate the physiology of their host, which invites therapeutic targeting.
Topics: Humans; Scalp; Microbiota; Hair Follicle; Adult; Staphylococcus epidermidis; Malassezia; Female; Middle Aged; Male; Aged; Propionibacteriaceae; Young Adult
PubMed: 38070726
DOI: 10.1016/j.jid.2023.11.006 -
International Journal of Dermatology Sep 2021Acne vulgaris is a worldwide condition that has a complex pathophysiology. The knowledge of this pathology is clear in its four classic principles based on the... (Review)
Review
Acne vulgaris is a worldwide condition that has a complex pathophysiology. The knowledge of this pathology is clear in its four classic principles based on the pilosebaceous unit; there exists hyperkeratinization of its duct, increase of sebum production, anaerobic bacterias, and inflammatory response. However, new findings have explained the relationship that occurs inside the acne lesion. The immune system has a key role since it is stimulated by the other participants involved, such as phylotypes of Propionibacterium acnes (P. acnes), antimicrobial peptides (AMPs), sebaceous glands (SGs), matrix metalloproteinases (MMPs), and other immune system pathways.
Topics: Acne Vulgaris; Humans; Immune System; Propionibacterium acnes; Sebaceous Glands; Sebum
PubMed: 33426647
DOI: 10.1111/ijd.15415 -
International Journal of Systematic and... Apr 2020Eight facultatively anaerobic rod-shaped bacteria were isolated from raw milk and two other dairy products. Results of phylogenetic analyses based on 16S rRNA gene...
Eight facultatively anaerobic rod-shaped bacteria were isolated from raw milk and two other dairy products. Results of phylogenetic analyses based on 16S rRNA gene sequences showed that the isolates are placed in a distinct lineage within the family with and as the closest relatives (94.6 and 93.5 % similarity, respectively). The cell-wall peptidoglycan contained -diaminopimelic acid, alanine and glutamic acid and was of the A1γ type (-DAP-direct). The major cellular fatty acid was anteiso-C and the major polar lipids were diphosphatidylglycerol, phosphatidyglycerol and three unidentified glycolipids. The quinone system contained predominantly menaquinone MK-9(H). The G+C content of the genomic DNA of strain VG341 was 67.7 mol%. The whole-cell sugar pattern contained ribose, rhamnose, arabinose and galactose. On the basis of phenotypic and genetic data, eight strains (VG341, WS4684, WS4769, WS 4882, WS4883, WS4901, WS4902 and WS4904) are proposed to be classified as members of a novel species in a new genus of the family , for which the name gen. nov., sp. nov. is proposed. The type strain is VG341 (=WS4900=DSM 100885=LMG 29089) and seven additional strains are WS4684, WS4769, WS4882, WS4883, WS4901, WS4902 and WS4904. Furthermore, we propose the reclassification of as comb. nov.
Topics: Animals; Bacterial Typing Techniques; Base Composition; Cell Wall; DNA, Bacterial; Dairy Products; Diaminopimelic Acid; Fatty Acids; Food Microbiology; Germany; Glycolipids; Milk; Peptidoglycan; Phospholipids; Phylogeny; Propionibacteriaceae; RNA, Ribosomal, 16S; Sequence Analysis, DNA; Vitamin K 2
PubMed: 32043954
DOI: 10.1099/ijsem.0.003909