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Schiavolin L, Deneubourg G, Steinmetz J, Smeesters PR, Botteaux A. Group A Streptococcus adaptation to diverse niches: lessons from transcriptomic studies. Crit Rev Microbiol 2024; 50:241-265. [PMID: 38140809 DOI: 10.1080/1040841x.2023.2294905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Accepted: 12/10/2023] [Indexed: 12/24/2023]
Abstract
Group A Streptococcus (GAS) is a major human pathogen, causing diseases ranging from mild superficial infections of the skin and pharyngeal epithelium to severe systemic and invasive diseases. Moreover, post infection auto-immune sequelae arise by a yet not fully understood mechanism. The ability of GAS to cause a wide variety of infections is linked to the expression of a large set of virulence factors and their transcriptional regulation in response to various physiological environments. The use of transcriptomics, among others -omics technologies, in addition to traditional molecular methods, has led to a better understanding of GAS pathogenesis and host adaptation mechanisms. This review focusing on bacterial transcriptomic provides new insight into gene-expression patterns in vitro, ex vivo and in vivo with an emphasis on metabolic shifts, virulence genes expression and transcriptional regulators role.
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Affiliation(s)
- Lionel Schiavolin
- Microbiology Laboratory, European Plotkin Institute of Vaccinology, Université libre de Bruxelles, Brussels, Belgium
| | - Geoffrey Deneubourg
- Microbiology Laboratory, European Plotkin Institute of Vaccinology, Université libre de Bruxelles, Brussels, Belgium
| | - Jenny Steinmetz
- Microbiology Laboratory, European Plotkin Institute of Vaccinology, Université libre de Bruxelles, Brussels, Belgium
| | - Pierre R Smeesters
- Microbiology Laboratory, European Plotkin Institute of Vaccinology, Université libre de Bruxelles, Brussels, Belgium
- Department of Paediatrics, Brussels University Hospital, Academic Children Hospital Queen Fabiola, Université libre de Bruxelles, Brussels, Belgium
| | - Anne Botteaux
- Microbiology Laboratory, European Plotkin Institute of Vaccinology, Université libre de Bruxelles, Brussels, Belgium
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2
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Zhong B, Qin X, Xu H, Liu L, Li L, Li Z, Cao L, Lou Z, Jackman JA, Cho NJ, Wang L. Interindividual- and blood-correlated sweat phenylalanine multimodal analytical biochips for tracking exercise metabolism. Nat Commun 2024; 15:624. [PMID: 38245507 PMCID: PMC10799919 DOI: 10.1038/s41467-024-44751-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Accepted: 01/03/2024] [Indexed: 01/22/2024] Open
Abstract
In situ monitoring of endogenous amino acid loss through sweat can provide physiological insights into health and metabolism. However, existing amino acid biosensors are unable to quantitatively assess metabolic status during exercise and are rarely used to establish blood-sweat correlations because they only detect a single concentration indicator and disregard sweat rate. Here, we present a wearable multimodal biochip integrated with advanced electrochemical electrodes and multipurpose microfluidic channels that enables simultaneous quantification of multiple sweat indicators, including phenylalanine and chloride, as well as sweat rate. This combined measurement approach reveals a negative correlation between sweat phenylalanine levels and sweat rates among individuals, which further enables identification of individuals at high metabolic risk. By tracking phenylalanine fluctuations induced by protein intake during exercise and normalizing the concentration indicator by sweat rates to reduce interindividual variability, we demonstrate a reliable method to correlate and analyze sweat-blood phenylalanine levels for personal health monitoring.
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Affiliation(s)
- Bowen Zhong
- State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, China
- Center of Materials Science and Optoelectronic Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xiaokun Qin
- State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, China
- Center of Materials Science and Optoelectronic Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Hao Xu
- State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, China
- Center of Materials Science and Optoelectronic Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Lingchen Liu
- State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, China
- Center of Materials Science and Optoelectronic Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Linlin Li
- State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, China
- Center of Materials Science and Optoelectronic Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Zhexin Li
- State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, China
- Center of Materials Science and Optoelectronic Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Limin Cao
- Tianjin Key Laboratory of Lung Cancer Metastasis and Tumor Microenvironment, Tianjin Lung Cancer Institute, Tianjin Medical University General Hospital, Tianjin, 300052, China
| | - Zheng Lou
- State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, China
- Center of Materials Science and Optoelectronic Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Joshua A Jackman
- School of Chemical Engineering and Translational Nanobioscience Research Center, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Nam-Joon Cho
- School of Materials Science and Engineering, Nanyang Technological University, 637553, Singapore, Singapore
| | - Lili Wang
- State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, China.
- Center of Materials Science and Optoelectronic Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China.
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3
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Moore K, Grégoire S, Eilstein J, Delgado-Charro MB, Guy RH. Reverse Iontophoresis: Noninvasive Assessment of Topical Drug Bioavailability. Mol Pharm 2024; 21:234-244. [PMID: 38060844 PMCID: PMC10762657 DOI: 10.1021/acs.molpharmaceut.3c00791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 10/27/2023] [Accepted: 10/27/2023] [Indexed: 01/02/2024]
Abstract
Assessing drug disposition in the skin after the application of a topical formulation is difficult. It is hypothesized that reverse iontophoresis (RI), which can extract charged/polar molecules for monitoring purposes, may provide a noninvasive approach for the assessment of local drug bioavailability. The passive and RI extraction of salicylic acid (SA) and nicotine (NIC) from porcine skin in vitro was assessed after a simple solution of the former and a transdermal patch of the latter had been applied for 24 and 8 h, respectively. Immediately after this "passive skin loading", the amount of drug in the stratum corneum (SC) and "viable" tissue (VT) was measured either (a) after tape-stripping and subsequent solvent extraction of both skin layers or (b) following RI extraction over 4 h. Parallel experiments were then performed in vivo in healthy volunteers; in this case, the VT was not sampled and the skin loading period for NIC was only 4 h. RI extraction of both drugs was significantly higher (in vitro and in vivo) than that achieved passively, and the cumulative RI extraction profiles as a function of time were mathematically analyzed using a straightforward compartmental model. Best-fit estimates of drug amounts in the SC and VT (ASC,0 and AVT,0, respectively) at the end of "loading" and two first-order rate constants describing transfer between the model compartments were then determined. The in vitro predictions of ASC,0 and AVT,0 were in excellent agreement with the experimental results, as was the value of the former in vivo. The rate constants derived from the in vitro and in vivo results were also similar. In summary, the results provide proof-of-concept that the RI method has the potential to noninvasively assess relevant metrics of drug bioavailability in the skin.
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Affiliation(s)
- Kieran Moore
- Department
of Life Sciences, University of Bath, Claverton Down, Bath BA2 7AY, U.K.
| | - Sébastien Grégoire
- L’Oréal
Research and Innovation, 1 Av. Eugène Schueller, 93600 Aulnay-sous-Bois, France
| | - Joan Eilstein
- L’Oréal
Research and Innovation, 1 Av. Eugène Schueller, 93600 Aulnay-sous-Bois, France
| | | | - Richard H. Guy
- Department
of Life Sciences, University of Bath, Claverton Down, Bath BA2 7AY, U.K.
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4
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Sonoki Y, Dat Pham Q, Sparr E. Beyond Additivity: A mixture of glucose and NaCl can influence skin hydration more than the individual compounds. J Colloid Interface Sci 2022; 613:554-562. [DOI: 10.1016/j.jcis.2021.12.166] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 12/15/2021] [Accepted: 12/24/2021] [Indexed: 11/16/2022]
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5
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Jankovskaja S, Morin M, Gustafsson A, Anderson CD, Lehoczki B, Engblom J, Björklund S, Rezeli M, Marko-Varga G, Ruzgas T. Non-Invasive, Topical Sampling of Potential, Low-Molecular Weight, Skin Cancer Biomarkers: A Study on Healthy Volunteers. Anal Chem 2022; 94:5856-5865. [PMID: 35394278 PMCID: PMC9022073 DOI: 10.1021/acs.analchem.1c05470] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Monitoring of low-molecular weight cancer biomarkers, such as tryptophan (Trp) and its derivative kynurenine (Kyn), might be advantageous to non-invasive skin cancer detection. Thus, we assessed several approaches of topical sampling of Trp and Kyn, in relation to phenylalanine (Phe) and tyrosine (Tyr), on the volar forearm of six healthy volunteers. The sampling was performed with three hydrogels (made of agarose or/and chitosan), hydrated starch films, cotton swabs, and tape stripping. The biomarkers were successfully sampled by all approaches, but the amount of collected Kyn was low, 20 ± 10 pmol/cm2. Kyn quantification was below LOQ, and thus, it was detected only in 20% of topical samples. To mitigate variability problems of absolute amounts of sampled amino acids, Tyr/Trp, Phe/Trp, and Phe/Tyr ratios were assessed, proving reduced inter-individual variation from 79 to 45% and intra-individual variation from 42 to 21%. Strong positive correlation was found between Phe and Trp, pointing to the Phe/Trp ratio (being in the 1.0-2.0 range, at 95% confidence) being least dependent on sampling materials, approaches, and sweating. This study leads to conclusion that due to the difficulty in quantifying less abundant Kyn, and thus the Trp/Kyn ratio, the Phe/Trp ratio might be a possible, alternative biomarker for detecting skin cancers.
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Affiliation(s)
- Skaidre Jankovskaja
- Department of Biomedical Science, Malmö University, Malmö 214 28, Sweden.,Biofilms─Research Center for Biointerfaces, Malmö University, Malmö 214 28, Sweden
| | - Maxim Morin
- Department of Biomedical Science, Malmö University, Malmö 214 28, Sweden.,Biofilms─Research Center for Biointerfaces, Malmö University, Malmö 214 28, Sweden
| | - Anna Gustafsson
- Department of Biomedical Science, Malmö University, Malmö 214 28, Sweden.,Biofilms─Research Center for Biointerfaces, Malmö University, Malmö 214 28, Sweden
| | - Chris D Anderson
- Department of Biomedical and Clinical Sciences, Linköping University, Linköping 581 83, Sweden.,Department of Dermatology and Venereology, Linköping 581 83, Sweden
| | - Boglarka Lehoczki
- Department of Biomedical Science, Malmö University, Malmö 214 28, Sweden.,Biofilms─Research Center for Biointerfaces, Malmö University, Malmö 214 28, Sweden
| | - Johan Engblom
- Department of Biomedical Science, Malmö University, Malmö 214 28, Sweden.,Biofilms─Research Center for Biointerfaces, Malmö University, Malmö 214 28, Sweden
| | - Sebastian Björklund
- Department of Biomedical Science, Malmö University, Malmö 214 28, Sweden.,Biofilms─Research Center for Biointerfaces, Malmö University, Malmö 214 28, Sweden
| | - Melinda Rezeli
- Clinical Protein Science and Imaging, Department of Biomedical Engineering, Lund University, Lund 221 00, Sweden
| | - György Marko-Varga
- Clinical Protein Science and Imaging, Department of Biomedical Engineering, Lund University, Lund 221 00, Sweden
| | - Tautgirdas Ruzgas
- Department of Biomedical Science, Malmö University, Malmö 214 28, Sweden.,Biofilms─Research Center for Biointerfaces, Malmö University, Malmö 214 28, Sweden
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6
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Morin M, Jankovskaja S, Ruzgas T, Henricson J, Anderson CD, Brinte A, Engblom J, Björklund S. Hydrogels and Cubic Liquid Crystals for Non-Invasive Sampling of Low-Molecular-Weight Biomarkers-An Explorative In Vivo Study. Pharmaceutics 2022; 14:313. [PMID: 35214046 PMCID: PMC8879558 DOI: 10.3390/pharmaceutics14020313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2021] [Revised: 01/20/2022] [Accepted: 01/25/2022] [Indexed: 02/05/2023] Open
Abstract
The molecular composition of human skin is altered due to diseases, which can be utilized for non-invasive sampling of biomarkers and disease diagnostics. For this to succeed, it is crucial to identify a sampling formulation with high extraction efficiency and reproducibility. Highly hydrated skin is expected to be optimal for increased diffusion of low-molecular-weight biomarkers, enabling efficient extraction as well as enhanced reproducibility as full hydration represents a well-defined endpoint. Here, the aim was to explore water-based formulations with high water activities, ensuring satisfactory skin hydration, for non-invasive sampling of four analytes that may serve as potential biomarkers, namely tryptophan, tyrosine, phenylalanine, and kynurenine. The included formulations consisted of two hydrogels (chitosan and agarose) and two different liquid crystalline cubic phases based on the polar lipid glycerol monooleate, which were all topically applied for 2 h on 35 healthy subjects in vivo. The skin status of all sampling sites was assessed by electrical impedance spectroscopy and transepidermal water loss, enabling explorative correlations between biophysical properties and analyte abundancies. Taken together, all formulations resulted in the successful and reproducible collection of the investigated biomarkers. Still, the cubic phases had an extraction capacity that was approximately two times higher compared to the hydrogels.
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Affiliation(s)
- Maxim Morin
- Department of Biomedical Sciences, Faculty of Health and Society, Malmö University, SE-205 06 Malmö, Sweden; (M.M.); (S.J.); (T.R.); (J.E.)
- Biofilms–Research Center for Biointerfaces, Malmö University, SE-205 06 Malmö, Sweden
| | - Skaidre Jankovskaja
- Department of Biomedical Sciences, Faculty of Health and Society, Malmö University, SE-205 06 Malmö, Sweden; (M.M.); (S.J.); (T.R.); (J.E.)
- Biofilms–Research Center for Biointerfaces, Malmö University, SE-205 06 Malmö, Sweden
| | - Tautgirdas Ruzgas
- Department of Biomedical Sciences, Faculty of Health and Society, Malmö University, SE-205 06 Malmö, Sweden; (M.M.); (S.J.); (T.R.); (J.E.)
- Biofilms–Research Center for Biointerfaces, Malmö University, SE-205 06 Malmö, Sweden
| | - Joakim Henricson
- Division of Clinical Chemistry and Pharmacology, Department of Biomedical and Clinical Sciences, Faculty of Health Sciences, Linköping University, SE-581 83 Linköping, Sweden;
- Department of Emergency Medicine, Local Health Care Services in Central Östergötland, SE-581 85 Linköping, Sweden
| | - Chris D. Anderson
- Division of Cell Biology, Department of Biomedical and Clinical Sciences, Faculty of Health Sciences, Linköping University, SE-581 83 Linköping, Sweden;
| | - Anders Brinte
- ImaGene-iT, Medicon Village, SE-223 63 Lund, Sweden;
| | - Johan Engblom
- Department of Biomedical Sciences, Faculty of Health and Society, Malmö University, SE-205 06 Malmö, Sweden; (M.M.); (S.J.); (T.R.); (J.E.)
- Biofilms–Research Center for Biointerfaces, Malmö University, SE-205 06 Malmö, Sweden
| | - Sebastian Björklund
- Department of Biomedical Sciences, Faculty of Health and Society, Malmö University, SE-205 06 Malmö, Sweden; (M.M.); (S.J.); (T.R.); (J.E.)
- Biofilms–Research Center for Biointerfaces, Malmö University, SE-205 06 Malmö, Sweden
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7
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Morin M, Björklund S, Jankovskaja S, Moore K, Delgado-Charro MB, Ruzgas T, Guy RH, Engblom J. Reverse Iontophoretic Extraction of Skin Cancer-Related Biomarkers. Pharmaceutics 2021; 14:79. [PMID: 35056976 PMCID: PMC8778044 DOI: 10.3390/pharmaceutics14010079] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 12/16/2021] [Accepted: 12/22/2021] [Indexed: 11/16/2022] Open
Abstract
Non-invasive methods for early diagnosis of skin cancer are highly valued. One possible approach is to monitor relevant biomarkers such as tryptophan (Trp) and kynurenine (Kyn), on the skin surface. The primary aim of this in vitro investigation was, therefore, to examine whether reverse iontophoresis (RI) can enhance the extraction of Trp and Kyn, and to demonstrate how the Trp/Kyn ratio acquired from the skin surface reflects that in the epidermal tissue. The study also explored whether the pH of the receiver medium impacted on extraction efficiency, and assessed the suitability of a bicontinuous cubic liquid crystal as an alternative to a simple buffer solution for this purpose. RI substantially enhanced the extraction of Trp and Kyn, in particular towards the cathode. The Trp/Kyn ratio obtained on the surface matched that in the viable skin. Increasing the receiver solution pH from 4 to 9 improved extraction of both analytes, but did not significantly change the Trp/Kyn ratio. RI extraction of Trp and Kyn into the cubic liquid crystal was comparable to that achieved with simple aqueous receiver solutions. We conclude that RI offers a potential for non-invasive sampling of low-molecular weight biomarkers and further investigations in vivo are therefore warranted.
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Affiliation(s)
- Maxim Morin
- Department of Biomedical Science, Faculty of Health and Society, Malmö University, SE-205 06 Malmö, Sweden; (S.B.); (S.J.); (T.R.)
- Biofilms—Research Center for Biointerfaces, Malmö University, SE-205 06 Malmö, Sweden
| | - Sebastian Björklund
- Department of Biomedical Science, Faculty of Health and Society, Malmö University, SE-205 06 Malmö, Sweden; (S.B.); (S.J.); (T.R.)
- Biofilms—Research Center for Biointerfaces, Malmö University, SE-205 06 Malmö, Sweden
| | - Skaidre Jankovskaja
- Department of Biomedical Science, Faculty of Health and Society, Malmö University, SE-205 06 Malmö, Sweden; (S.B.); (S.J.); (T.R.)
- Biofilms—Research Center for Biointerfaces, Malmö University, SE-205 06 Malmö, Sweden
| | - Kieran Moore
- Department of Pharmacy & Pharmacology, University of Bath, Claverton Down, Bath BA2 7AY, UK; (K.M.); (M.B.D.-C.); (R.H.G.)
| | - Maria Begoña Delgado-Charro
- Department of Pharmacy & Pharmacology, University of Bath, Claverton Down, Bath BA2 7AY, UK; (K.M.); (M.B.D.-C.); (R.H.G.)
| | - Tautgirdas Ruzgas
- Department of Biomedical Science, Faculty of Health and Society, Malmö University, SE-205 06 Malmö, Sweden; (S.B.); (S.J.); (T.R.)
- Biofilms—Research Center for Biointerfaces, Malmö University, SE-205 06 Malmö, Sweden
| | - Richard H. Guy
- Department of Pharmacy & Pharmacology, University of Bath, Claverton Down, Bath BA2 7AY, UK; (K.M.); (M.B.D.-C.); (R.H.G.)
| | - Johan Engblom
- Department of Biomedical Science, Faculty of Health and Society, Malmö University, SE-205 06 Malmö, Sweden; (S.B.); (S.J.); (T.R.)
- Biofilms—Research Center for Biointerfaces, Malmö University, SE-205 06 Malmö, Sweden
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8
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Extraction of natural moisturizing factor from the stratum corneum and its implication on skin molecular mobility. J Colloid Interface Sci 2021; 604:480-491. [PMID: 34273783 DOI: 10.1016/j.jcis.2021.07.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2021] [Revised: 07/01/2021] [Accepted: 07/02/2021] [Indexed: 12/12/2022]
Abstract
The natural moisturizing factor (NMF) is a mixture of small water-soluble compounds present in the upper layer of the skin, stratum corneum (SC). Soaking of SC in water leads to extraction of the NMF molecules, which may influence the SC molecular properties and lead to brittle and dry skin. In this study, we investigate how the molecular dynamics in SC lipid and protein components are affected by the removal of the NMF compounds. We then explore whether the changes in SC components caused by NMF removal can be reversed by a subsequent addition of one single NMF component: urea, pyrrolidone carboxylic acid (PCA) or potassium lactate. Samples of intact SC were investigated using NMR, X-ray diffraction, infrared spectroscopy and sorption microbalance. It is shown that the removal of NMF leads to reduced molecular mobility in keratin filaments and SC lipids compared to untreated SC. When the complex NMF mixture is replaced by one single NMF component, the molecular mobility in both keratin filaments and lipids is regained. From this we propose a general relation between the molecular mobility in SC and the amount of polar solutes which does not appear specific to the precise chemical identify of the NMF compounds.
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9
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Hirose Y, Yamaguchi M, Sumitomo T, Nakata M, Hanada T, Okuzaki D, Motooka D, Mori Y, Kawasaki H, Coady A, Uchiyama S, Hiraoka M, Zurich RH, Amagai M, Nizet V, Kawabata S. Streptococcus pyogenes upregulates arginine catabolism to exert its pathogenesis on the skin surface. Cell Rep 2021; 34:108924. [PMID: 33789094 PMCID: PMC9214650 DOI: 10.1016/j.celrep.2021.108924] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 01/15/2021] [Accepted: 03/09/2021] [Indexed: 10/21/2022] Open
Abstract
The arginine deiminase (ADI) pathway has been found in many kinds of bacteria and functions to supplement energy production and provide protection against acid stress. The Streptococcus pyogenes ADI pathway is upregulated upon exposure to various environmental stresses, including glucose starvation. However, there are several unclear points about the advantages to the organism for upregulating arginine catabolism. We show that the ADI pathway contributes to bacterial viability and pathogenesis under low-glucose conditions. S. pyogenes changes global gene expression, including upregulation of virulence genes, by catabolizing arginine. In a murine model of epicutaneous infection, S. pyogenes uses the ADI pathway to augment its pathogenicity by increasing the expression of virulence genes, including those encoding the exotoxins. We also find that arginine from stratum-corneum-derived filaggrin is a key substrate for the ADI pathway. In summary, arginine is a nutrient source that promotes the pathogenicity of S. pyogenes on the skin.
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Affiliation(s)
- Yujiro Hirose
- Department of Oral and Molecular Microbiology, Osaka University Graduate School of Dentistry, Suita, Osaka 565-0871, Japan; Department of Pediatrics, University of California at San Diego School of Medicine, La Jolla, CA 92093, USA.
| | - Masaya Yamaguchi
- Department of Oral and Molecular Microbiology, Osaka University Graduate School of Dentistry, Suita, Osaka 565-0871, Japan
| | - Tomoko Sumitomo
- Department of Oral and Molecular Microbiology, Osaka University Graduate School of Dentistry, Suita, Osaka 565-0871, Japan
| | - Masanobu Nakata
- Department of Oral Microbiology, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima 890-8544, Japan
| | - Tomoki Hanada
- Department of Oral and Molecular Microbiology, Osaka University Graduate School of Dentistry, Suita, Osaka 565-0871, Japan
| | - Daisuke Okuzaki
- Genome Information Research Center, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka 565-0871, Japan
| | - Daisuke Motooka
- Department of Infection Metagenomics, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka 565-0871, Japan
| | - Yasushi Mori
- Department of Oral and Molecular Microbiology, Osaka University Graduate School of Dentistry, Suita, Osaka 565-0871, Japan
| | - Hiroshi Kawasaki
- Department of Dermatology, Keio University School of Medicine, Tokyo 160-8582, Japan; Immunology Data Integration Unit, RIKEN Medical Sciences Innovation Hub Program, Yokohama 230-0045, Japan; Laboratory for Skin Homeostasis, RIKEN Center for Integrative Medical Sciences, Yokohama 230-0045, Japan
| | - Alison Coady
- Department of Pediatrics, University of California at San Diego School of Medicine, La Jolla, CA 92093, USA
| | - Satoshi Uchiyama
- Department of Pediatrics, University of California at San Diego School of Medicine, La Jolla, CA 92093, USA
| | - Masanobu Hiraoka
- Department of Pediatrics, University of California at San Diego School of Medicine, La Jolla, CA 92093, USA; Department of Otorhinolaryngology-Head and Neck Surgery, Wakayama Medical University, Wakayama, Wakayama 641-8509, Japan
| | - Raymond H Zurich
- Department of Pediatrics, University of California at San Diego School of Medicine, La Jolla, CA 92093, USA
| | - Masayuki Amagai
- Department of Dermatology, Keio University School of Medicine, Tokyo 160-8582, Japan; Laboratory for Skin Homeostasis, RIKEN Center for Integrative Medical Sciences, Yokohama 230-0045, Japan
| | - Victor Nizet
- Department of Pediatrics, University of California at San Diego School of Medicine, La Jolla, CA 92093, USA; Skaggs School of Pharmaceutical Sciences, University of California at San Diego, La Jolla, CA 92093, USA
| | - Shigetada Kawabata
- Department of Oral and Molecular Microbiology, Osaka University Graduate School of Dentistry, Suita, Osaka 565-0871, Japan.
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10
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Yamada T, Habuka A, Hatta I. Moisturizing mechanism of glycerol and diglycerol on human stratum corneum studied by synchrotron X-ray diffraction. Int J Cosmet Sci 2020; 43:38-47. [PMID: 32969048 DOI: 10.1111/ics.12664] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Accepted: 09/15/2020] [Indexed: 11/30/2022]
Abstract
OBJECTIVE Polyols are moisturizers used in cosmetics. Using X-ray diffraction, we studied the moisturizingmechanism of polyol solutions in the stratum corneum (SC). We examined whether glycerol disrupts the ordered hydrocarbon chain packing structure in isolated SC, as previously proposed in an SC lipid model. METHODS The SC samples were prepared by treatment with water and aqueous solutions of glycerol, diglycerol and glycerol/diglycerol. To examine the differences in the water-retention efficiency of polyols, using a solution cell, we performed dynamic X-ray diffraction to analyse the structural changes that occurred during water removal from the hydrated samples by a stream of dry nitrogen gas. We focused on two structures, the orthorhombic hydrocarbon chain packing structure in the intercellular lipids and the soft keratin in the corneocytes where most of the water is stored. RESULTS The spacing formed by the soft keratin in the corneocytes immersed in a solution of water and diglycerol solution decreased rapidly by water removal. In contrast, it decreased gradually in the corneocytes immersed in a solution of glycerol and glycerol/diglycerol, indicating that the glycerol-containing solutions maintained the hydrated state of the corneocytes for longer. Furthermore, the characteristic change of the spacing in the orthorhombic hydrocarbon chain packing structure over time was observed during the drying process. The hydrated state was maintained longer, in water, followed by glycerol, diglycerol and glycerol/diglycerol, in increasing order. This is the first study to report such characteristic properties that could be indicators of the capacity of the SC to regulate water. CONCLUSION The dynamic X-ray diffraction experiment on the structure of the soft keratin and the orthorhombic hydrocarbon chain packing structure during the drying of the hydrated SC provides an insight into the moisturizing mechanism of the polyol solutions in the SC. The results show that the glycerol/diglycerol solution functions as an effective SC moisturizer at the molecular level. Further, it was confirmed that the behaviour of glycerol in the isolated SC varies from that proposed in the SC lipid model, wherein glycerol was proposed to prevent the formation of a regular hydrocarbon chain packing structure.
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Affiliation(s)
- T Yamada
- Sakamoto Yakuhin Kogyo Co., Ltd., 3-1-62 Ayumino, Izumi, Osaka, 594-1157, Japan
| | - A Habuka
- Sakamoto Yakuhin Kogyo Co., Ltd., 3-1-62 Ayumino, Izumi, Osaka, 594-1157, Japan
| | - I Hatta
- Nagoya Industrial Science Research Institute, 2-10-19 Yotsuyadori, Chikusa-ku, Nagoya, Aichi, 464-0819, Japan
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11
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Hussain H, Ziegler J, Hause G, Wohlrab J, Neubert RHH. Quantitative Analysis of Free Amino Acids and Urea Derived from Isolated Corneocytes of Healthy Young, Healthy Aged, and Diseased Skin. Skin Pharmacol Physiol 2019; 32:94-100. [PMID: 30783061 DOI: 10.1159/000495992] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Accepted: 11/27/2018] [Indexed: 11/19/2022]
Abstract
BACKGROUND/AIMS Free amino acids (FAAs) and urea, present inside the corneocytes, can be important indicators of skin condition. However, due to the lack of a standard extraction protocol for FAAs from corneocytes, conflicting research results have been reported. Therefore, the purpose of this study was (1) to standardize the extraction protocol and (2) to investigate FAA profiles in healthy young and healthy old volunteers, as well as in psoriasis and atopic dermatitis patients. METHODS Skin samples were collected from four groups (healthy young, healthy old, and psoriasis and atopic dermatitis patients) with 5 volunteers per group. Corneocytes were isolated and examined microscopically. FAAs and urea were extracted from the isolated corneocytes, and their amounts were quantified using LC-ESI/MS/MS (after derivatization with Fmoc-Cl) and colorimetric methods, respectively. RESULTS The micrographs of the corneocytes showed no morphological features attributable to age or disease conditions. The highest and lowest concentrations of total FAAs and urea were observed in the healthy old group and the healthy young group, respectively. Unlike the other FAAs and urea, citrulline was found at a higher level in the healthy young group than in the disease groups. CONCLUSION This study suggests that the levels of FAAs and urea in the skin are affected by age and skin conditions (healthy/diseased). However, further studies are needed to show the effects of different skin conditions on the levels of FAAs and urea.
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Affiliation(s)
- Hina Hussain
- Department of Pharmaceutical Technology and Biopharmaceutics, Institute of Pharmacy, Martin Luther University of Halle-Wittenberg, Halle (Saale), Germany
| | - Jörg Ziegler
- Department of Molecular Signal Processing, Institute of Plant Biochemistry, Halle (Saale), Germany
| | - Gerd Hause
- Microscopy Unit, Biocenter of the University, Martin Luther University of Halle-Wittenberg, Halle (Saale), Germany
| | - Johannes Wohlrab
- Institute of Applied Dermatopharmacy, Martin Luther University of Halle-Wittenberg, Halle (Saale), Germany.,Department of Dermatology and Venereology, Medical Faculty, Martin Luther University of Halle-Wittenberg, Halle (Saale), Germany
| | - Reinhard H H Neubert
- Department of Pharmaceutical Technology and Biopharmaceutics, Institute of Pharmacy, Martin Luther University of Halle-Wittenberg, Halle (Saale), Germany, .,Institute of Applied Dermatopharmacy, Martin Luther University of Halle-Wittenberg, Halle (Saale), Germany,
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12
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Brainina KZ, Markina MG, Stozhko NY. Optimized Potentiometric Assay for Non-invasive Investigation of Skin Antioxidant Activity. ELECTROANAL 2018. [DOI: 10.1002/elan.201800309] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Khiena Z. Brainina
- Ural State University of Economics; 8 March St., 62 Ekaterinburg 620144 Russian Federation
- Ural Federal University; Lenin Ave., 51 Ekaterinburg 620000 Russian Federation
| | - Maria G. Markina
- Ural State University of Economics; 8 March St., 62 Ekaterinburg 620144 Russian Federation
| | - Natalia Yu. Stozhko
- Ural State University of Economics; 8 March St., 62 Ekaterinburg 620144 Russian Federation
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13
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Sánchez MIG, McCullagh J, Guy RH, Compton RG. Reverse Iontophoretic Extraction of Metabolites from Living Plants and their Identification by Ion-chromatography Coupled to High Resolution Mass Spectrometry. PHYTOCHEMICAL ANALYSIS : PCA 2017; 28:195-201. [PMID: 28029194 DOI: 10.1002/pca.2660] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Revised: 09/14/2016] [Accepted: 10/09/2016] [Indexed: 06/06/2023]
Abstract
INTRODUCTION The identification and characterisation of cellular metabolites has now become an important strategy to obtain insight into functional plant biology. However, the extraction of metabolites for identification and analysis is challenging and, at the present time, usually requires destruction of the plant. OBJECTIVE To detect different plant metabolites in living plants with no pre-treatment using the combination of iontophoresis and ion-chromatography with mass spectrometry detection. METHODOLOGY In this work, the simple and non-destructive method of reverse iontophoresis has been used to extract in situ multiple plant metabolites from intact Ocimum basilicum leaves. Subsequently, the analysis of these metabolites has been performed with ion chromatography coupled directly to high resolution mass spectrometric detection (IC-MS). RESULTS The application of reverse iontophoresis to living plant samples has avoided the need for complex pre-treatments. With this approach, no less than 24 compounds, including organic acids and sugars as well as adenosine triphosphate (ATP) were successfully detected. CONCLUSION The research demonstrates that it is feasible to monitor, therefore, a number of important plant metabolites using a simple, relatively fast and non-destructive approach. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Maria Isabel González Sánchez
- Department of Chemistry, Physical and Theoretical Chemistry Laboratory, Oxford University, South Parks Road, Oxford, OX1 3QZ, UK
- Department of Physical Chemistry, Castilla-La Mancha University, 02071, Albacete, Spain
| | - James McCullagh
- Mass Spectrometry Research Facility CRL, Department of Chemistry, Oxford University, Mansfield Road, Oxford, UK
| | - Richard H Guy
- Department of Chemistry, Physical and Theoretical Chemistry Laboratory, Oxford University, South Parks Road, Oxford, OX1 3QZ, UK
- Department of Pharmacy and Pharmacology, University of Bath, Bath, BA2 7AY, UK
| | - Richard G Compton
- Department of Chemistry, Physical and Theoretical Chemistry Laboratory, Oxford University, South Parks Road, Oxford, OX1 3QZ, UK
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14
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Markina M, Stozhko N, Krylov V, Vidrevich M, Brainina K. Nanoparticle-based paper sensor for thiols evaluation in human skin. Talanta 2017; 165:563-569. [PMID: 28153299 DOI: 10.1016/j.talanta.2017.01.012] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2016] [Revised: 01/03/2017] [Accepted: 01/06/2017] [Indexed: 10/20/2022]
Abstract
A new sensitive non-invasive gold nanoparticle-based sensor that enables to detect thiols in the human skin has been developed. The detection procedure implied the assessment of the color change of a paper sensor resulting from aggregation of gold nanoparticles caused by thiols. The ratio of the intensity of the photo image blue channel vs the red one (in units of RGB coloration) served as analytical response. The main thiol in the skin is glutathione, therefore, it was used as model biothiol and spiking substance. The range of linearity for glutathione was 8-75µM, the detection limit was 6.9µM. RSD≤7% is for inter-day determination of 10μM glutathione and RSD≤12% is the intra-day value. The recovery of 5µM and 10µM of glutathione was evaluated by applying solution, containing thiol-spikes, on skin. The results varied in the range 77-138%. A hundred-fold excess of serine, alanine, histidine, threonine, creatinine, urea, and ammonia; a ten-fold excess of glycine, proline, leucine, isoleucine, phenylalanine, asparagine; and a five-fold excess of valine, tryptophan, tyrosine, and uric acid, which can be extracted from the skin and is contained in the test matrix, have no significant effect on 10µM glutathione signal. Thiols level in the skin of volunteers (21-65 years old, men and women) detected with the use of a proposed non-invasive sensor was 11.6-47.5µM.
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Affiliation(s)
- M Markina
- Ural State University of Economics, 8 March St., 62, Ekaterinburg 620144, Russian Federation
| | - N Stozhko
- Ural State University of Economics, 8 March St., 62, Ekaterinburg 620144, Russian Federation
| | - V Krylov
- Ural State University of Economics, 8 March St., 62, Ekaterinburg 620144, Russian Federation
| | - M Vidrevich
- Ural State University of Economics, 8 March St., 62, Ekaterinburg 620144, Russian Federation
| | - Kh Brainina
- Ural State University of Economics, 8 March St., 62, Ekaterinburg 620144, Russian Federation; Ural Federal University, Lenin Ave., 51, Ekaterinburg 620000, Russian Federation.
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15
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du Toit H, Rashidi R, Ferdani DW, Delgado-Charro MB, Sangan CM, Di Lorenzo M. Generating power from transdermal extracts using a multi-electrode miniature enzymatic fuel cell. Biosens Bioelectron 2016; 78:411-417. [DOI: 10.1016/j.bios.2015.11.074] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2015] [Revised: 11/09/2015] [Accepted: 11/24/2015] [Indexed: 01/01/2023]
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16
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Stanciu CE, Philpott MK, Bustamante EE, Kwon YJ, Ehrhardt CJ. Analysis of red autofluorescence (650-670nm) in epidermal cell populations and its potential for distinguishing contributors to 'touch' biological samples. F1000Res 2016; 5:180. [PMID: 27990254 PMCID: PMC5130068 DOI: 10.12688/f1000research.8036.1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 02/11/2016] [Indexed: 11/29/2022] Open
Abstract
Interpretation of touch DNA mixtures poses a significant challenge for forensic caseworking laboratories. Front end techniques that facilitate separation of contributor cell populations before DNA extraction are a way to circumvent this problem. The goal of this study was to survey intrinsic fluorescence of epidermal cells collected from touch surfaces and investigate whether this property could potentially be used to discriminate between contributor cell populations in a biological mixture. Analysis of red autofluorescence (650-670nm) showed that some contributors could be distinguished on this basis. Variation was also observed between autofluorescence profiles of epidermal cell populations from a single contributor sampled on different days. This dataset suggests that red autofluorescence may be a useful marker for identifying distinct cell populations in some mixtures. Future efforts should continue to investigate the extrinsic or intrinsic factors contributing to this signature, and to identify additional biomarkers that could complement this system.
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Affiliation(s)
- Cristina E Stanciu
- Department of Forensic Science, Virginia Commonwealth University, Richmond, VA, USA
| | - M Katherine Philpott
- Department of Forensic Science, Virginia Commonwealth University, Richmond, VA, USA
| | - Eduardo E Bustamante
- Department of Forensic Science, Virginia Commonwealth University, Richmond, VA, USA
| | - Ye Jin Kwon
- Department of Forensic Science, Virginia Commonwealth University, Richmond, VA, USA
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17
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Extraction of Iron from the Rabbit Anterior Chamber with Reverse Iontophoresis. J Ophthalmol 2015; 2015:425438. [PMID: 26257921 PMCID: PMC4518192 DOI: 10.1155/2015/425438] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2015] [Accepted: 07/02/2015] [Indexed: 12/24/2022] Open
Abstract
Ocular siderosis is a common eye disease caused by retention of an iron-containing intraocular foreign body in the eye. Iron-containing intraocular foreign bodies may cause severe inflammatory reaction and affect visual function. Currently the optimal treatment method of ocular siderosis is a moot point. This study used the reverse iontophoresis technique to noninvasively extract iron from the rabbit anterior chamber. By slit lamp observation and histological examination, reverse iontophoresis treatment has a good effect on ocular siderosis. Reverse iontophoresis seems to be a noninvasive and promising approach to extract iron from the anterior chamber to treat ocular siderosis.
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18
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Characterisation of Skin Barrier Function Using Bioengineering and Biophysical Techniques. Pharm Res 2014; 32:445-57. [DOI: 10.1007/s11095-014-1473-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2014] [Accepted: 07/24/2014] [Indexed: 11/25/2022]
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19
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Non-invasive wearable electrochemical sensors: a review. Trends Biotechnol 2014; 32:363-71. [DOI: 10.1016/j.tibtech.2014.04.005] [Citation(s) in RCA: 778] [Impact Index Per Article: 77.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2013] [Revised: 04/03/2014] [Accepted: 04/04/2014] [Indexed: 12/14/2022]
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20
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Paliwal S, Hwang BH, Tsai KY, Mitragotri S. Diagnostic opportunities based on skin biomarkers. Eur J Pharm Sci 2013; 50:546-56. [DOI: 10.1016/j.ejps.2012.10.009] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2012] [Revised: 10/14/2012] [Accepted: 10/17/2012] [Indexed: 12/20/2022]
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21
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Wollein Waldetoft K, Råberg L. To harm or not to harm? On the evolution and expression of virulence in group A streptococci. Trends Microbiol 2013; 22:7-13. [PMID: 24238777 DOI: 10.1016/j.tim.2013.10.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2013] [Revised: 10/15/2013] [Accepted: 10/17/2013] [Indexed: 12/20/2022]
Abstract
Group A streptococci (GAS) cause three different types of infection (sensu lato) with distinct levels of virulence: asymptomatic colonization, superficial symptomatic infection, and invasive infection. To address why this pattern with several infection types has evolved, we combine mechanistic understanding from infection medicine with recent theory from evolutionary ecology. We propose that asymptomatic colonization and superficial symptomatic infection exploit different states of the host epithelium to maximize transmission between hosts in different epidemiological conditions, whereas the ability of the bacteria to cause invasive infection is a non-adaptive side effect of traits required for superficial symptomatic infection.
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Affiliation(s)
| | - Lars Råberg
- Department of Biology, Lund University, SE-223 62 Lund, Sweden
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22
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Myer K, Maibach H. Stratum corneum evaluation methods: overview. Skin Res Technol 2013; 19:213-9. [DOI: 10.1111/srt.12011] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/09/2012] [Indexed: 01/25/2023]
Affiliation(s)
- Kaley Myer
- Department of Dermatology; University of California San Francisco; San Francisco CA USA
| | - Howard Maibach
- Department of Dermatology; University of California San Francisco; San Francisco CA USA
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23
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Carvalho BG, Raniero LJ, Martin AA, Favero PP. Phenylalanine ab initio models for the simulation of skin natural moisturizing factor. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 106:73-79. [PMID: 23376262 DOI: 10.1016/j.saa.2012.12.082] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2012] [Revised: 12/27/2012] [Accepted: 12/28/2012] [Indexed: 06/01/2023]
Abstract
In this study, we evaluated models that can be used to simulate amino acids in biological environments via density functional theory (DFT). The goal was to obtain realistic representations that combine computational economy and result quality when compared to experimental data. We increased the complexity of the models by using a model of an amino acid in a vacuum, followed by a water-solvated amino acid model. To consider pH variation, we simulated zwitterionic and nonionic amino acid configurations. The amino acid chosen for testing was phenylalanine, an aromatic amino acid present in high concentrations in the natural moisturizing factor of skin that plays a fundamental role in ultraviolet protection and vitiligo disease. To validate the models, vibrational modes and electronic properties were calculated and compared to experimental results.
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Affiliation(s)
- B G Carvalho
- Institute of Research and Development, University of Vale Paraíba, Shishima Hifumi Av. 2911, 12244-000 São José dos Campos, São Paulo, Brazil.
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24
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Delgado-Charro M. Richard Guy and His Collaborators:Crackling'the Skin Code. Skin Pharmacol Physiol 2013; 26:302-12. [DOI: 10.1159/000351937] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2013] [Accepted: 03/11/2013] [Indexed: 11/19/2022]
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25
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Rapid, simultaneous and nanomolar determination of pyroglutamic acid and cis-/trans-urocanic acid in human stratum corneum by hydrophilic interaction liquid chromatography (HILIC)-electrospray ionization tandem mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci 2012; 897:55-63. [PMID: 22560249 DOI: 10.1016/j.jchromb.2012.04.008] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2011] [Revised: 03/28/2012] [Accepted: 04/04/2012] [Indexed: 11/22/2022]
Abstract
A rapid, sensitive and specific hydrophilic interaction liquid chromatography coupled to tandem mass spectrometric (HILIC-MS/MS) method for the simultaneous determination of pyroglutamic acid, cis- and trans-urocanic acid in human skin stratum corneum (SC) were developed and validated. This method was carried out without derivatization or addition of ion-pair additives in mobile phase. The analytes were extracted by PBS buffer solution and analyzed using an electrospray positive ionization mass spectrometry in the multiple reaction monitoring (MRM) mode. Chromatographic separation was performed on an AQUITY UPLC amide column using gradient elution with the mobile phase of water and acetonitrile. The standard curves were linear over the concentration range of 1.0-250 ng/mL with a correlation coefficient higher than 0.999 with an LLOQ of 0.5 ng/mL. The lower limits of detection (LLOD) of these analytes were lower than 0.2 ng/mL. The intra- and inter-day precisions were measured to be below 7.7% and accuracies were within the range of 94.3-102.6%. The validated method was successfully applied to determine the level of pyroglutamic acid and cis-/trans-urocanic acid in the SC samples from forearm and forehead region of 19 human volunteers.
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26
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Simonsson C, Andersson SI, Stenfeldt AL, Bergström J, Bauer B, Jonsson CA, Ericson MB, Broo KS. Caged fluorescent haptens reveal the generation of cryptic epitopes in allergic contact dermatitis. J Invest Dermatol 2011; 131:1486-93. [PMID: 21228815 DOI: 10.1038/jid.2010.422] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Allergic contact dermatitis (ACD) is the most prevalent form of human immunotoxicity. It is caused by skin exposure to haptens, i.e., protein-reactive, low-molecular-weight chemical compounds, which form hapten-protein complexes (HPCs) in the skin, triggering the immune system. These immunogenic HPCs are elusive. In this study a series of thiol-reactive caged fluorescent haptens, i.e., bromobimanes, were deployed in combination with two-photon fluorescence microscopy, immunohistochemistry, and proteomics to identify possible hapten targets in proteins in human skin. Key targets found were the basal keratinocytes and the keratins K5 and K14. Particularly, cysteine 54 of K5 was found to be haptenated by the bromobimanes. In addition, elevated levels of anti-keratin antibodies were found in the sera of mice exposed to bromobimanes in vivo. The results indicate a general mechanism in which thiol-reactive haptens generate cryptic epitopes normally concealed from the immune system. In addition, keratinocytes and keratin seem to have an important role in the mechanism behind ACD, which is a subject for further investigations.
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Affiliation(s)
- Carl Simonsson
- Department of Chemistry, Dermatochemistry and Skin Allergy, University of Gothenburg, Gothenburg, Sweden
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