scholarly journals Circulating Antibodies to Skin Bacteria Detected by Serological Lateral Flow Immunoassays Differentially Correlated With Bacterial Abundance

2021 ◽  
Vol 12 ◽  
Author(s):  
Ryan Yuki Huang ◽  
Chuen Neng Lee ◽  
Shabbir Moochhala
Keyword(s):  
Acne Vulgaris ◽  
Lateral Flow ◽  
Sequencing Analysis ◽  
Skin Microbiome ◽  
Pilosebaceous Unit ◽  
Skin Bacteria ◽  
Cutibacterium Acnes ◽  
Next Generation Sequencing Analysis ◽  
Antibody Titers ◽  
Circulating Antibodies

The serological lateral flow immunoassay (LFIA) was used to detect circulating antibodies to skin bacteria. Next-generation sequencing analysis of the skin microbiome revealed a high relative abundance of Cutibacterium acnes but low abundance of Staphylococcus aureus and Corynebacterium aurimucosum on human facial samples. Yet, results from both LFIA and antibody titer quantification in 96-well microplates illustrated antibody titers that were not correspondent, and instead negatively correlated, to their respective abundance with human blood containing higher concentrations of antibodies to both S. aureus and C. aurimucosum than C. acnes. Acne vulgaris develops several unique microbial and cellular features, but its correlation with circulating antibodies to bacteria in the pilosebaceous unit remains unknown. Results here revealed that antibodies to C. acnes and S. aureus were approximately 3-fold higher and 1.5-fold lower, respectively, in acne patients than in healthy subjects. Although the results can be further validated by larger sample sizes, the proof-of-concept study demonstrates a newfound discrepancy between the abundance of skin bacteria and amounts of their corresponding antibodies. And in light of acne-correlated amplified titers of specific anticommensal antibodies, we highlight that profiling these antibodies in the pilosebaceous unit by LFIAs may provide a unique signature for monitoring acne vulgaris.

scholarly journals Propionibacterium (Cutibacterium) granulosum Extracellular DNase BmdE Targeting Propionibacterium (Cutibacterium) acnes Biofilm Matrix, a Novel Inter-Species Competition Mechanism

2022 ◽  
Vol 11 ◽  
Author(s):  
Vicky Bronnec ◽  
Hinnerk Eilers ◽  
Anika C. Jahns ◽  
Hélène Omer ◽  
Oleg A. Alexeyev
Keyword(s):  
Extracellular Matrix ◽  
Acne Vulgaris ◽  
Opportunistic Pathogen ◽  
Resistant Bacteria ◽  
Skin Microbiome ◽  
Cutibacterium Acnes ◽  
Propionibacterium Granulosum ◽  
Extracellular Nuclease

Acne vulgaris is the most common dermatological disorder worldwide affecting more than 80% of adolescents and young adults with a global prevalence of 231 million cases in 2019. The involvement of the skin microbiome disbalance in the pathophysiology of acne is recognized, especially regarding the relative abundance and diversity of Propionibacterium acnes a well-known dominant human skin commensal. Biofilms, where bacteria are embedded into a protective polymeric extracellular matrix, are the most prevalent life style for microorganisms. P. acnes and its biofilm-forming ability is believed to be a contributing factor in the development of acne vulgaris, the persistence of the opportunistic pathogen and antibiotic therapy failures. Degradation of the extracellular matrix is one of the strategies used by bacteria to disperse the biofilm of competitors. In this study, we report the identification of an endogenous extracellular nuclease, BmdE, secreted by Propionibacterium granulosum able to degrade P. acnes biofilm both in vivo and in vitro. This, to our knowledge, may represent a novel competitive mechanism between two closely related species in the skin. Antibiotics targeting P. acnes have been the mainstay in acne treatment. Extensive and long-term use of antibiotics has led to the selection and spread of resistant bacteria. The extracellular DNase BmdE may represent a new bio-therapeutical strategy to combat P. acnes biofilm in acne vulgaris.

scholarly journals Engineering selectivity of Cutibacterium acnes phages by epigenetic imprinting

2021 ◽  
Author(s):  
Nastassia Knoedlseder ◽  
Guillermo Nevot ◽  
Mariajosé Fábrega ◽  
Júlia Mir-Pedrol ◽  
Marta Sanvicente ◽  
...  
Keyword(s):  
Recombinant Expression ◽  
Acne Vulgaris ◽  
Consensus Sequence ◽  
Skin Microbiome ◽  
Knockout Mutant ◽  
Protective Mechanisms ◽  
Oxford Nanopore ◽  
Cutibacterium Acnes ◽  
Phage Dna ◽  
Methylation Activity

Cutibacterium acnes (C. acnes) is a gram-positive bacterium and a member of the human skin microbiome. Despite being the most abundant skin commensal, certain members have been associated with common inflammatory disorders such as acne vulgaris. The availability of the complete genome sequences from various C. acnes clades have enabled the identification of putative methyltransferases, some of them potentially belonging to restriction-modification (R-M) systems which protect the host of invading DNA. However, little is known on whether these systems are functional in the different C. acnes strains. To investigate the activity of these putative R-M and their relevance in host protective mechanisms, we analyzed the methylome of seven representative C. acnes strains by Oxford Nanopore Technologies (ONT) sequencing. We detected the presence of a 6-methyladenine modification at a defined DNA consensus sequence in strain KPA171202 and recombinant expression of this R-M system confirmed its methylation activity. Additionally, a R-M knockout mutant verified the loss of methylation properties of the strain. We studied the potential of one C. acnes bacteriophage (PAD20) in killing various C. acnes strains and linked an increase in its specificity to phage DNA methylation acquired upon infection of a methylation competent strain. We demonstrate a therapeutic application of this mechanism where phages propagated in R-M deficient strains selectively kill R-M deficient acne-prone clades while probiotic ones remain resistant to phage infection.

scholarly journals PEG-8 Laurate Fermentation of Staphylococcus epidermidis Reduces the Required Dose of Clindamycin Against Cutibacterium acnes

2020 ◽  
Vol 21 (14) ◽  
pp. 5103
Author(s):  
Shinta Marito ◽  
Sunita Keshari ◽  
Chun-Ming Huang
Keyword(s):  
Staphylococcus Epidermidis ◽  
Low Dose ◽  
Acne Vulgaris ◽  
Carbon Sources ◽  
Skin Microbiome ◽  
Adjuvant Effect ◽  
Inflammatory Protein ◽  
Cutibacterium Acnes ◽  
First Time ◽  
Macrophage Inflammatory Protein

The probiotic activity of skin Staphylococcus epidermidis (S. epidermidis) bacteria can elicit diverse biological functions via the fermentation of various carbon sources. Here, we found that polyethylene glycol (PEG)-8 Laurate, a carbon-rich molecule, can selectively induce the fermentation of S. epidermidis, not Cutibacterium acnes (C. acnes), a bacterium associated with acne vulgaris. The PEG-8 Laurate fermentation of S. epidermidis remarkably diminished the growth of C. acnes and the C. acnes-induced production of pro-inflammatory macrophage-inflammatory protein 2 (MIP-2) cytokines in mice. Fermentation media enhanced the anti-C. acnes activity of a low dose (0.1%) clindamycin, a prescription antibiotic commonly used to treat acne vulgaris, in terms of the suppression of C. acnes colonization and MIP-2 production. Furthermore, PEG-8 Laurate fermentation of S. epidermidis boosted the activity of 0.1% clindamycin to reduce the sizes of C. acnes colonies. Our results demonstrated, for the first time, that the PEG-8 Laurate fermentation of S. epidermidis displayed the adjuvant effect on promoting the efficacy of low-dose clindamycin against C. acnes. Targeting C. acnes by lowering the required doses of antibiotics may avoid the risk of creating drug-resistant C. acnes and maintain the bacterial homeostasis in the skin microbiome, leading to a novel modality for the antibiotic treatment of acne vulgaris.

scholarly journals Microbiome and acne vulgaris

2020 ◽  
Vol 23 (6) ◽  
pp. 388-394
Author(s):  
Ziyuan Ma ◽  
Nikolay G. Kochergin
Keyword(s):  
Staphylococcus Epidermidis ◽  
Acne Vulgaris ◽  
Skin Microbiome ◽  
Inflammatory Skin Disease ◽  
Treatment Resistant ◽  
Number Of Patients ◽  
Cutibacterium Acnes ◽  
Pathogenic Microbes ◽  
The Relationship

Acne vulgaris is a highly prevalent inflammatory skin disease involving sebaceous follicle. Although the pathogensis of acne remains uncertain, skin microbes are considered to plays an essential role in acne vulgaris. Cutibacterium acnes is the most important microbe in acne pathogenesis and its several processes: colonization, over-proliferation and inflammation have long been thought to contribute to the disease. Moreover, Staphylococcus epidermidis and Malassezia also synergistically collaborate with Cutibacterium acnes. Besides, given the growing number of patients who are treatment resistant, assessments are needed on phenotypic changes in the skin microbiome with retinoids and antibacterial therapy. Further research on the role of microbes in the pathogenesis of acne and the relationship between pathogenic microbes is expected to provide a new theoretical basis for clinical treatment of acne.

Prevalence and Induction of Circulating Antibodies against Recombinant Staphylokinase

1994 ◽  
Vol 71 (01) ◽  
pp. 129-133 ◽  
Author(s):  
P J Declerck ◽  
S Vanderschueren ◽  
J Billiet ◽  
H Moreau ◽  
D Collen
Keyword(s):  
Intravenous Administration ◽  
Human Subjects ◽  
Microtiter Plates ◽  
Staphylococcus Aureus Bacteremia ◽  
Alternative Agent ◽  
Antibody Titers ◽  
Potential Alternative ◽  
Circulating Antibodies ◽  
Low Levels ◽  
Antibody Levels

SummaryStreptokinase (SK) is a routinely used thrombolytic agent but it is immunogenic and allergenic; staphylokinase (STA) is a potential alternative agent which is under early clinical evaluation. The comparative prevalence of antibodies against recombinant STA (STAR) and against SK was studied in healthy subjects and their induction with intravenous administration in small groups of patients.Enzyme-linked immunosorbent assays, using microtiter plates coated with STAR or SK and calibration with affinospecific human antibodies, revealed 2.1 to 65 μg/ml (median 11 μg/ml) anti-STAR antibodies and 0.9 to 370 μg/ml (median 18 μg/ml) anti-SK antibodies (p <0.001 vs anti-STAR antibodies) in plasma from 100 blood donors, with corresponding values of 0.6 to 100 μg/ml (median 7.1 μg/ml) and 0.4 to 120 μg/ml (median 7.3 μg/ml), respectively, in 104 patients with angina pectoris. Three out of 17 patients with Staphylococcus aureus bacteremia had significantly increased anti-STAR antibody levels (150, 75 and 75 μg/ml), and STAR neutralizing activities (2.2, 3.6 and 4.1 μg STAR neutralized per ml plasma, respectively). In 6 patients with acute myocardial infarction, given 10 mg STAR intravenously over 30 min, median anti-STAR antibody levels were 3.5 μg/ml at baseline, 2.9 μg/ml at 6 to 8 days and 1.2 μg/ml at 2 to 9 weeks, with median corresponding titers of STAR neutralizing activity at 2 to 9 weeks of 42 μg/ml plasma. Conversely, in 5 patients treated with 1,500,000 units SK over 60 min, median anti-SK antibodies increased from 2.9 μg/ml at baseline to 360 μg/ml at 5 to 10 days, with corresponding median SK neutralizing activities of 13 μg/ml. Antibodies against STAR did not cross-react with SK and vice versa.Plasma from human subjects contains low levels of circulating antibodies against recombinant staphylokinase, and intravenous administration of this compound boosts antibody titers. These antibodies do however not cross-react with streptokinase, whereby the use of these two immunogenic thrombolytic agents would not be mutually exclusive.

Sidharthakadi Lepa in Mukhadushika - A Clinical Study

2018 ◽  
Vol 3 (01) ◽  
Author(s):  
Ravindra Angadi ◽  
Rekha J.
Keyword(s):  
Skin Disorder ◽  
Acne Vulgaris ◽  
Response To Therapy ◽  
Inclusion Criteria ◽  
Pilosebaceous Unit ◽  
External Application ◽  
Acne Lesion ◽  
Common Skin ◽  
The Face ◽  
Inflammatory Component

Background: Acne vulgaris is a very common malady of adolescents. It is common enough to be called as a physiological process but is better regarded as a disease due to its inflammatory component and the disfigurement. Acne vulgaris is a common skin disorder of pilosebaceous unit that primarily affects the face which if not treated leads to pigmentation. Mukhadushika is a Kshudra Roga which mainly involves Kapha and Vatadosa with Raktha. This is a common illness affecting 80 % of adolescents. Lepa is one of the external therapies explained in Ayurvedic classics. Objectives: To evaluate the efficacy of Sidharthakadilepa in the management of mukhadushikaw.s.r. to acne vulgaris. Methods: 30 patients fulfilling the inclusion criteria were selected. They were given Sidharthakadi Lepa for external application over face for one month. Patients were observed for changes on 7th, 14th, 21st and 28th day. The response to therapy was evaluated at the end of 28 days by calculating acne lesion score and the efficacy was determined by the percentage reduction in ALS. Results: The analysis revealed that 40% of patients had complete remission, 30% patients showed marked improvement and 30% showed moderate improvement.

scholarly journals Anti-HPV16 Antibody Titers Prior to an Incident Cervical HPV16/31 Infection

Viruses ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1548
Author(s):  
Ana Gradissimo ◽  
Viswanathan Shankar ◽  
Fanua Wiek ◽  
Lauren St. Peter ◽  
Yevgeniy Studentsov ◽  
...  
Keyword(s):  
High Risk ◽  
Hpv Vaccine ◽  
Enzyme Linked Immunosorbent Assay ◽  
Incident Detection ◽  
Antibody Titers ◽  
Circulating Antibodies ◽  
Prospective Association ◽  
Nested Case Control ◽  
Incident Cases

The goal of this study was to investigate the serological titers of circulating antibodies against human papillomavirus (HPV) type 16 (anti-HPV16) prior to the detection of an incident HPV16 or HPV31 infection amongst vaccinated participants. Patients were selected from a prospective post-HPV vaccine longitudinal cohort at Mount Sinai Adolescent Health Center in Manhattan, NY. We performed a nested case–control study of 43 cases with incident detection of cervical HPV16 (n = 26) or HPV31 (n = 17) DNA who had completed the full set of immunizations of the quadrivalent HPV vaccine (4vHPV). Two control individuals whom had received three doses of the vaccine (HPV16/31-negative) were selected per case, matched on age at the first dose of vaccination and follow-up time in the study: a random control, and a high-risk control that was in the upper quartile of a sexual risk behavior score. We conducted an enzyme-linked immunosorbent assay (ELISA) for the detection of immunoglobulin G (IgG) antibodies specific to anti-HPV16 virus-like particles (VLPs). The results suggest that the average log antibody titers were higher among high-risk controls than the HPV16/31 incident cases and the randomly selected controls. We show a prospective association between anti-HPV16 VLP titers and the acquisition of an HPV16/31 incident infection post-receiving three doses of 4vHPV vaccine.

scholarly journals Next-Generation Sequencing Analysis of the Tineola bisselliella Larval Gut Transcriptome Reveals Candidate Enzymes for Keratin Digestion

Genes ◽  
2021 ◽  
Vol 12 (8) ◽  
pp. 1113
Author(s):  
Michael Schwabe ◽  
Sven Griep ◽  
Henrike Schmidtberg ◽  
Rudy Plarre ◽  
Alexander Goesmann ◽  
...  
Keyword(s):  
Next Generation Sequencing ◽  
Disulfide Bonds ◽  
Differentially Expressed ◽  
Intestinal Microbiome ◽  
Sequencing Analysis ◽  
High Quality ◽  
Transcriptomic Data ◽  
Next Generation Sequencing Analysis ◽  
Generation Sequencing ◽  
Tineola Bisselliella

The clothes moth Tineola bisselliella is one of a few insects that can digest keratin, leading to the destruction of clothing, textiles and artwork. The mechanism of keratin digestion is not yet fully understood, partly reflecting the lack of publicly available genomic and transcriptomic data. Here we present a high-quality gut transcriptome of T. bisselliella generated from larvae reared on keratin-rich and keratin-free diets. The overall transcriptome consists of 428,221 contigs that were functionally annotated and screened for candidate enzymes involved in keratin utilization. As a mechanism for keratin digestion, we identified cysteine synthases, cystathionine β-synthases and cystathionine γ-lyases. These enzymes release hydrogen sulfite, which may reduce the disulfide bonds in keratin. The dataset also included 27 differentially expressed contigs with trypsin domains, among which 20 were associated with keratin feeding. Finally, we identified seven collagenases that were upregulated on the keratin-rich diet. In addition to this enzymatic repertoire potentially involved in breaking down keratin, our analysis of poly(A)-enriched and poly(A)-depleted transcripts suggested that T. bisselliella larvae possess an unstable intestinal microbiome that may nevertheless contribute to keratin digestion.

scholarly journals MicroRNAs from Snellenius manilae bracovirus regulate innate and cellular immune responses of its host Spodoptera litura

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Cheng-Kang Tang ◽  
Chih-Hsuan Tsai ◽  
Carol-P. Wu ◽  
Yu-Hsien Lin ◽  
Sung-Chan Wei ◽  
...  
Keyword(s):  
Immune Responses ◽  
Spodoptera Litura ◽  
Molecular Mechanisms ◽  
Innate Immune ◽  
Sequencing Analysis ◽  
Innate Immune Responses ◽  
Cellular Immune Responses ◽  
Next Generation Sequencing Analysis ◽  
Cellular Immune ◽  
Generation Sequencing

AbstractTo avoid inducing immune and physiological responses in insect hosts, parasitoid wasps have developed several mechanisms to inhibit them during parasitism, including the production of venom, specialized wasp cells, and symbioses with polydnaviruses (PDVs). These mechanisms alter the host physiology to give the wasp offspring a greater chance of survival. However, the molecular mechanisms for most of these alterations remain unclear. In the present study, we applied next-generation sequencing analysis and identified several miRNAs that were encoded in the genome of Snellenius manilae bracovirus (SmBV), and expressed in the host larvae, Spodoptera litura, during parasitism. Among these miRNAs, SmBV-miR-199b-5p and SmBV-miR-2989 were found to target domeless and toll-7 in the host, which are involved in the host innate immune responses. Microinjecting the inhibitors of these two miRNAs into parasitized S. litura larvae not only severely decreased the pupation rate of Snellenius manilae, but also restored the phagocytosis and encapsulation activity of the hemocytes. The results demonstrate that these two SmBV-encoded miRNAs play an important role in suppressing the immune responses of parasitized hosts. Overall, our study uncovers the functions of two SmBV-encoded miRNAs in regulating the host innate immune responses upon wasp parasitism.

scholarly journals Characterization of Weissella viridescens UCO-SMC3 as a Potential Probiotic for the Skin: Its Beneficial Role in the Pathogenesis of Acne Vulgaris

2021 ◽  
Vol 9 (7) ◽  
pp. 1486
Author(s):  
Marcela Espinoza-Monje ◽  
Jorge Campos ◽  
Eduardo Alvarez Villamil ◽  
Alonso Jerez ◽  
Stefania Dentice Maidana ◽  
...  
Keyword(s):  
Immune Response ◽  
Oral Treatment ◽  
Acne Vulgaris ◽  
Topical Administration ◽  
In Vivo Studies ◽  
Mice Model ◽  
Cutibacterium Acnes ◽  
Snail Helix Aspersa

Previously, we isolated lactic acid bacteria from the slime of the garden snail Helix aspersa Müller and selected Weissella viridescens UCO-SMC3 because of its ability to inhibit in vitro the growth of the skin-associated pathogen Cutibacterium acnes. The present study aimed to characterize the antimicrobial and immunomodulatory properties of W. viridescens UCO-SMC3 and to demonstrate its beneficial effect in the treatment of acne vulgaris. Our in vitro studies showed that the UCO-SMC3 strain resists adverse gastrointestinal conditions, inhibits the growth of clinical isolates of C. acnes, and reduces the adhesion of the pathogen to keratinocytes. Furthermore, in vivo studies in a mice model of C. acnes infection demonstrated that W. viridescens UCO-SMC3 beneficially modulates the immune response against the skin pathogen. Both the oral and topical administration of the UCO-SCM3 strain was capable of reducing the replication of C. acnes in skin lesions and beneficially modulating the inflammatory response. Of note, orally administered W. viridescens UCO-SMC3 induced more remarkable changes in the immune response to C. acnes than the topical treatment. However, the topical administration of W. viridescens UCO-SMC3 was more efficient than the oral treatment to reduce pathogen bacterial loads in the skin, and effects probably related to its ability to inhibit and antagonize the adhesion of C. acnes. Furthermore, a pilot study in acne volunteers demonstrated the capacity of a facial cream containing the UCO-SMC3 strain to reduce acne lesions. The results presented here encourage further mechanistic and clinical investigations to characterize W. viridescens UCO-SMC3 as a probiotic for acne vulgaris treatment.

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