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Weissinger H, Knetzger N, Cleve C, Lotz C. Impedance-based in vitro eye irritation testing enables the categorization of diluted chemicals. Sci Rep 2024; 14:6216. [PMID: 38486034 PMCID: PMC10940615 DOI: 10.1038/s41598-024-56191-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Accepted: 03/04/2024] [Indexed: 03/18/2024] Open
Abstract
Products containing chemicals with eye irritation potential need to be labeled with the respective hazard symbol. To avoid the testing of numerous dilutions of chemicals on animals, their labeling is directed by a theoretical approach. In this report, a previously described in vitro tissue model of the cornea based on human epithelial cells was used for eye irritation testing of dilutions. As a sensitive and non-destructive method to analyze the barrier function of the epithelium, impedance spectroscopy was applied. Moreover, the morphology and viability of the epithelial models were assessed. We tested four chemicals that, neatly, cause severe damage to the eye: tetrahydrofuran, acetic acid, diethylethanolamine, and benzalkonium chloride. With our test method, we were able to determine the concentrations of the chemicals which are critical for the integrity of the cornea. The threshold was < 0.1% for the most and > 5% for the least toxic substance. The described test system is not only an alternative for animal models but also for the theoretical examination of the hazard potential of diluted chemicals. By using the advantages of tissue engineering and non-destructive analysis tools, we can achieve more precise and safer labeling of the eye irritation potential of products.
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Affiliation(s)
- H Weissinger
- Translational Center Regenerative Therapies (TLC-RT), Fraunhofer Institute for Silicate Research (ISC), Würzburg, Germany
- Tissue Engineering and Regenerative Medicine (TERM), University Hospital Würzburg, Würzburg, Germany
| | - N Knetzger
- Translational Center Regenerative Therapies (TLC-RT), Fraunhofer Institute for Silicate Research (ISC), Würzburg, Germany
| | - C Cleve
- Translational Center Regenerative Therapies (TLC-RT), Fraunhofer Institute for Silicate Research (ISC), Würzburg, Germany
| | - C Lotz
- Translational Center Regenerative Therapies (TLC-RT), Fraunhofer Institute for Silicate Research (ISC), Würzburg, Germany.
- Tissue Engineering and Regenerative Medicine (TERM), University Hospital Würzburg, Würzburg, Germany.
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Pagliaro M, Pecoraro L, Stefani C, Pieropan S, Piacentini G, Pietrobelli A. Bathing in Atopic Dermatitis in Pediatric Age: Why, How and When. Pediatr Rep 2024; 16:57-68. [PMID: 38251315 PMCID: PMC10801494 DOI: 10.3390/pediatric16010006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 12/06/2023] [Accepted: 01/03/2024] [Indexed: 01/23/2024] Open
Abstract
Atopic dermatitis is a chronic inflammatory skin disease. The treatment plays an important role in influencing the patients' quality of life. The basic management consists of appropriate skin cleansing, including bathing and eventually using bathing additives. Recommendations regarding frequency and duration of bathing, water temperature and usefulness of bathing additives are widely different, often leading to confusion among patients. This review aims to give insights into the best bathing practices and the use of bathing additives in atopic dermatitis in children. Several bathing additives, including bleach baths, commercial baby cleansers, bath baby oils and bath salt, appear to be promising adjunctive therapies for atopic dermatitis due to their anti-inflammatory, anti-bacterial, anti-pruritus and skin barrier repair properties through different mechanisms of action. However, their efficacy and safety are not fully understood in some cases. The usefulness of other bath additives, such as acidic and more natural substances (green tea extracts, pine tar, sodium bicarbonate), is still under investigation. Further studies are needed to determine their optimal use to achieve clinical benefit safely.
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Affiliation(s)
- Margherita Pagliaro
- Pediatric Unit, Department of Surgical Sciences, Dentistry, Gynecology and Pediatrics, University of Verona, 37126 Verona, Italy (C.S.); (A.P.)
| | - Luca Pecoraro
- Pediatric Unit, Department of Surgical Sciences, Dentistry, Gynecology and Pediatrics, University of Verona, 37126 Verona, Italy (C.S.); (A.P.)
| | - Camilla Stefani
- Pediatric Unit, Department of Surgical Sciences, Dentistry, Gynecology and Pediatrics, University of Verona, 37126 Verona, Italy (C.S.); (A.P.)
| | - Sara Pieropan
- Pediatric Unit, Department of Surgical Sciences, Dentistry, Gynecology and Pediatrics, University of Verona, 37126 Verona, Italy (C.S.); (A.P.)
| | - Giorgio Piacentini
- Pediatric Unit, Department of Surgical Sciences, Dentistry, Gynecology and Pediatrics, University of Verona, 37126 Verona, Italy (C.S.); (A.P.)
| | - Angelo Pietrobelli
- Pediatric Unit, Department of Surgical Sciences, Dentistry, Gynecology and Pediatrics, University of Verona, 37126 Verona, Italy (C.S.); (A.P.)
- Pennington Biomedical Research Center, Baton Rouge, LA 70808, USA
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Gaurav V, Bhoi AK, Mehta N. Home Remedies in Dermatology. Indian Dermatol Online J 2023; 14:864-870. [PMID: 38099029 PMCID: PMC10718121 DOI: 10.4103/idoj.idoj_166_23] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 05/18/2023] [Accepted: 05/18/2023] [Indexed: 12/17/2023] Open
Affiliation(s)
- Vishal Gaurav
- Department of Dermatology and Venereology, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, India
| | - Anil Kumar Bhoi
- Department of Dermatology and Venereology, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, India
| | - Nikhil Mehta
- Department of Dermatology and Venereology, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, India
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Lee M, Kim MS, Jang SH, Kim H, Kim GS, Lee H, Park HM, Yang J. Cera-Glow, ferment lysates of Lacticaseibacillus rhamnosus IDCC 3201, improves skin barrier function in clinical study. J Cosmet Dermatol 2023; 22:1879-1886. [PMID: 36718839 DOI: 10.1111/jocd.15642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 12/23/2022] [Accepted: 01/08/2023] [Indexed: 02/01/2023]
Abstract
BACKGROUND Ceramides are essential lipids in stratum corneum for skin permeability barrier function in that they retain the skin moisture and protect from the invasion of foreign pathogens. Previously, we demonstrated that ferment lysates of Lacticaseibacillus rhamnosus IDCC 3201 enhanced ceramide production in human epidermal keratinocytes. Furthermore, for comprehensive knowledge of this effect, in vitro experiments and multi-omics analysis were conducted to explore the underlying mechanisms. AIMS This study was designed to identify whether a cosmetic sample (i.e., Cera-Glow) containing the lysates improves the skin barrier function in clinical trials. PATIENTS/METHODS Twenty-four female participants (45.46 ± 9.78 years) had been enrolled in the transepidermal water loss (TEWL) measurement for 5 days and 21 female participants (50.33 ± 5.74 years) had undergone a skin hydration evaluation for 4 weeks. TEWL and skin hydration were evaluated using a Tewameter and the Epsilon Permittivity Imaging System, respectively. After applying the Cera-Glow sample, all participants recorded a satisfaction survey questionnaire (e.g., satisfaction, efficacy, and adverse reactions). RESULTS Application of Cera-Glow significantly improved transepidermal water loss induced by 1% (w/v) sodium lauryl sulfate (p < 0.05-0.01) and increased skin hydration (p < 0.01). Metabolic analysis suggested that Cera-Glow should contain beneficial gradients for skin barrier function. According to the questionnaire, most of participants were satisfied with the skin hydration improvement and efficacy of Cera-Glow. CONCLUSIONS Cera-Glow, ferment lysates of Lacticaseibacillus rhamnosus IDCC 3201, can significantly improve skin barrier function.
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Affiliation(s)
- Minjee Lee
- IBS Research Center, Ildong Bioscience, Pyeongtaek, Republic of Korea
| | - Myun Soo Kim
- Future Technology Research Center, ICBIO, Cheonan, Republic of Korea
| | - Sung Hee Jang
- Future Technology Research Center, ICBIO, Cheonan, Republic of Korea
| | - Hayoung Kim
- IBS Research Center, Ildong Bioscience, Pyeongtaek, Republic of Korea
| | - Gwang Seob Kim
- IBS Research Center, Ildong Bioscience, Pyeongtaek, Republic of Korea
| | - Hyerin Lee
- IBS Research Center, Ildong Bioscience, Pyeongtaek, Republic of Korea
| | - Hyun Min Park
- IBS Research Center, Ildong Bioscience, Pyeongtaek, Republic of Korea
| | - Jungwoo Yang
- IBS Research Center, Ildong Bioscience, Pyeongtaek, Republic of Korea
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Ballesteros A, Marambio M, Trullas C, Jourdan E, Tena-Medialdea J, Gili JM. Effect of Rinse Solutions on Rhizostoma pulmo (Cnidaria: Scyphozoa) Stings and the Ineffective Role of Vinegar in Scyphozoan Jellyfish Species. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2023; 20:2344. [PMID: 36767709 PMCID: PMC9915252 DOI: 10.3390/ijerph20032344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Revised: 01/21/2023] [Accepted: 01/25/2023] [Indexed: 06/18/2023]
Abstract
Rhizostoma pulmo is a widely distributed scyphozoan in the Mediterranean Sea. Their stings result mainly in erythema, small vesicles, or/and pain, and cause a high number of bathers to seek assistance from first-aid services during the summer season. Despite the threat that jellyfish stings represent to public health, there is disagreement in the scientific community on first-aid protocols, with the dispute largely centered around the effectiveness of vinegar. In the present research, we investigated the effect of commonly used rinse solutions on nematocyst discharge in R. pulmo and the effect of vinegar on three more scyphozoans (Aurelia sp., Cassiopea sp., and Rhizostoma luteum). Scented ammonia, vinegar, and acetic acid triggered nematocyst discharge in R. pulmo. Vinegar also caused nematocyst discharge in Aurelia sp., Cassiopea sp., and R. luteum. In contrast, seawater, baking soda, freshwater, urine, and hydrogen peroxide were considered neutral solutions that did not induce nematocyst discharge. These results indicate that the use of vinegar, acetic acid, or commercial products based on these compounds is counterproductive. Their use can worsen pain and discomfort caused not only by R. pulmo stings but also by those of any scyphozoan. The use of seawater is recommended for cleaning the R. pulmo sting site until an inhibitor solution that irreversibly prevents nematocyst discharge is discovered.
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Affiliation(s)
- Ainara Ballesteros
- Department of Marine Biology and Oceanography, ICM-CSIC-Institute of Marine Sciences, Passeig Marítim de la Barceloneta 37-49, 08003 Barcelona, Spain
- ISDIN, Innovation and Development, C. Provençals 33, 08019 Barcelona, Spain
| | - Macarena Marambio
- Department of Marine Biology and Oceanography, ICM-CSIC-Institute of Marine Sciences, Passeig Marítim de la Barceloneta 37-49, 08003 Barcelona, Spain
| | - Carles Trullas
- ISDIN, Innovation and Development, C. Provençals 33, 08019 Barcelona, Spain
| | - Eric Jourdan
- ISDIN, Innovation and Development, C. Provençals 33, 08019 Barcelona, Spain
| | - Jose Tena-Medialdea
- IMEDMAR-UCV-Institute of Environment and Marine Science Research, Universidad Católica de Valencia SVM, C. Explanada del Puerto S/n, 03710 Calp, Spain
| | - Josep-Maria Gili
- Department of Marine Biology and Oceanography, ICM-CSIC-Institute of Marine Sciences, Passeig Marítim de la Barceloneta 37-49, 08003 Barcelona, Spain
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