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Faria GEDL, Fakih-Gomez N, Tartare A, Zattar L, Machado ACHR, Felice F, Kadouch J, Muñoz-Gonzalez C, Boggio RF. Hand Rejuvenation with Customizable Hybrid Fillers: Premixed Calcium Hydroxyapatite and Hyaluronic Acid. Aesthetic Plast Surg 2024; 48:2887-2894. [PMID: 38831064 DOI: 10.1007/s00266-024-04145-4] [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: 04/07/2024] [Accepted: 05/13/2024] [Indexed: 06/05/2024]
Abstract
INTRODUCTION Hand aging is a prevalent concern characterized by the atrophy of local soft tissues and increased visibility of vessels and tendons. Hyaluronic acid (HA) and calcium hydroxyapatite (CaHA) are well-established treatments for addressing this issue. While hybrid filler containing HA and CaHA has been proposed for facial rejuvenation, studies investigating its efficacy for hand rejuvenation are lacking. OBJECTIVE This study aims to assess the safety and efficacy of a premixed hybrid filler containing calcium hydroxyapatite (CaHA) and hyaluronic acid (HA) for hand rejuvenation. METHODS A prospective, double-blind, controlled trial was conducted. The control arm (CA) received conventional subdermal treatment with CaHA at a 1:1 dilution. The intervention arm (IA) underwent hybrid treatment, consisting of CaHA at a 1:1 dilution combined with 1 ml of low-density HA. Evaluation was performed subjectively using the Global Aesthetic Improvement Scale (GAIS) and the Manchester Hand Grading System (MHGS), and objectively using cutometry, corneometry, and ultrasound. RESULTS Both the CA and the IA exhibited high rates of patient satisfaction and satisfaction as assessed by blinded evaluators. Although numerical superiority was observed in the IA, no statistical difference was found between the two groups. Significant improvements in hydration, elasticity, and skin thickness were observed in both arms, with no discernible difference between them. Greater ultrasound echogenicity was noted in the IA, which, as indicated by existing literature, may suggest enhanced biostimulation. No adverse effects were reported in either arm. CONCLUSION Premixed filler containing HA and CaHA for hand rejuvenation appears to be a safe and effective approach. LEVEL OF EVIDENCE I This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .
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Affiliation(s)
| | - Nabil Fakih-Gomez
- Department of Facial Plastic and Cranio-Maxillo-Facial Surgery, Fakih Hospital, Khaizaran, Lebanon
| | - Adriane Tartare
- Instituto Boggio-Medicina, Ensino e Pesquisa, São Paulo, Brazil
| | - Luciana Zattar
- Instituto Boggio-Medicina, Ensino e Pesquisa, São Paulo, Brazil.
| | | | | | | | - Cristina Muñoz-Gonzalez
- Department of Facial Plastic and Cranio-Maxillo-Facial Surgery, Fakih Hospital, Khaizaran, Lebanon
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Owda AY. A New Method for Detecting Dehydration of the Human Body Using Non-Contact Millimeter Wave Radiometry. SENSORS (BASEL, SWITZERLAND) 2024; 24:4461. [PMID: 39065857 PMCID: PMC11280757 DOI: 10.3390/s24144461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2024] [Revised: 07/06/2024] [Accepted: 07/09/2024] [Indexed: 07/28/2024]
Abstract
Dehydration is a common problem in the aging population. Medical professionals can detect dehydration using either blood or urine tests. This requires experimental tests in the lab as well as urine and blood samples to be obtained from the patients. This paper proposed 100 GHz millimeter wave radiometry for early detection of dehydration. Reflectance measurements were performed on healthy and dehydrated patients of both genders (120 males and 80 females) in the aging population. Based on the cause of dehydration, the patient groups were divided into three categories: (1) patients dehydrated due to less thirst sensation, (2) patients dehydrated due to illnesses (vomiting and diarrhea), and (3) patients dehydrated due to diabetes. Reflectance measurements were performed on eight locations: (1) the palm, (2) the back of the hand, (3) the fingers, (4) the inner wrist, (5) the outer wrist, (6) the volar side of the arm, (7) the dorsal surface of the arm, and (8) the elbow. Skin dehydrated due to vomiting and diarrhea was found to have lower reflectance at all the measurement locations compared with healthy and other types of dehydrated skin. The elbow region showed the highest difference in reflectance between healthy and dehydrated skin. This indicates that radiometric sensitivity is sufficient to detect dehydration in a few seconds. This will reduce the patient's waiting time and the healthcare professional's intervention time as well as allow early treatment of dehydration, thus avoiding admission to hospitals.
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Affiliation(s)
- Amani Yousef Owda
- Department of Natural, Engineering and Technology Sciences, Arab American University, Ramallah P600, Palestine
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Pereda J, Milde Khatib C, Kezic S, Christensen MO, Yang S, Thyssen JP, Chu CY, Riethmüller C, Liao HS, Akhtar I, Ungar B, Guttman-Yassky E, Hædersdal M, Hwu ET. A Review of Atomic-Force Microscopy in Skin Barrier Function Assessment. J Invest Dermatol 2024:S0022-202X(24)00357-9. [PMID: 38888524 DOI: 10.1016/j.jid.2024.04.005] [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: 05/05/2023] [Revised: 04/02/2024] [Accepted: 04/13/2024] [Indexed: 06/20/2024]
Abstract
Skin barrier function (SBF) disorders are a class of pathologies that affect a significant portion of the world population. These disorders cause skin lesions with intense itch, impacting patients' physical and psychological well-being as well as their social functioning. It is in the interest of patients that their disorder be monitored closely while under treatment to evaluate the effectiveness of the ongoing therapy and any potential adverse reactions. Symptom-based assessment techniques are widely used by clinicians; however, they carry some limitations. Techniques to assess skin barrier impairment are critical for understanding the nature of the disease and for helping personalize treatment. This review recalls the anatomy of the skin barrier and describes an atomic-force microscopy approach to quantitatively monitor its disorders and their response to treatment. We review a panel of studies that show that this technique is highly relevant for SBF disorder research, and we aim to motivate its adoption into clinical settings.
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Affiliation(s)
- Jorge Pereda
- The Danish National Research Foundation and Villum Foundation's Center for Intelligent Drug Delivery and Sensing Using Microcontainers and Nanomechanics (IDUN), Department of Health Technology, Technical University of Denmark, Lyngby, Denmark
| | - Casper Milde Khatib
- Department of Dermatology, Bispebjerg and Frederiksberg Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Sanja Kezic
- Amsterdam UMC, Coronel Institute of Occupational Health, Amsterdam, The Netherlands
| | | | - Sara Yang
- Department of Dermatology, Allergology and Venereology, University Hospital Schleswig-Holstein, University of Lübeck, Lübeck, Germany
| | - Jacob P Thyssen
- Department of Dermatology, Bispebjerg and Frederiksberg Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Chia-Yu Chu
- Department of Dermatology, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan
| | | | - Hsien-Shun Liao
- Department of Mechanical Engineering, National Taiwan University, Taipei, Taiwan
| | - Imtisal Akhtar
- The Danish National Research Foundation and Villum Foundation's Center for Intelligent Drug Delivery and Sensing Using Microcontainers and Nanomechanics (IDUN), Department of Health Technology, Technical University of Denmark, Lyngby, Denmark
| | - Benjamin Ungar
- The Kimberly and Eric J. Waldman Department of Dermatology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Emma Guttman-Yassky
- The Kimberly and Eric J. Waldman Department of Dermatology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Merete Hædersdal
- Bispebjerg Hospital, University of Copenhagen, Copenhagen, Denmark
| | - En-Te Hwu
- The Danish National Research Foundation and Villum Foundation's Center for Intelligent Drug Delivery and Sensing Using Microcontainers and Nanomechanics (IDUN), Department of Health Technology, Technical University of Denmark, Lyngby, Denmark.
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Lee JH, Kim J, Lee YN, Choi S, Lee YI, Suk J, Lee JH. The efficacy of intradermal hyaluronic acid filler as a skin quality booster: A prospective, single-center, single-arm pilot study. J Cosmet Dermatol 2024; 23:409-416. [PMID: 37705328 DOI: 10.1111/jocd.15944] [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: 04/14/2023] [Revised: 07/03/2023] [Accepted: 07/21/2023] [Indexed: 09/15/2023]
Abstract
BACKGROUND The use of "skin boosters" comprised of hyaluronic acid (HA)-based fillers to improve skin quality has gained popularity recently, especially in individuals interested in skin rejuvenation. AIM This study aimed to evaluate the efficacy and safety of intradermal micropuncture injections of HA-based gel filler combined with lidocaine (BYRYZN® SKINBOOSTER HA, ACROSS Co., Ltd., Gangwon-do, Korea). PATIENTS/METHODS A prospective, single-arm, open-label pilot study was conducted with study subjects who were aged between 30 and 60 years old and exhibited evidence of skin aging, such as wrinkles and loss of elasticity. They received three injections at 2-week intervals and were followed up for a total of 12 weeks. RESULTS Twenty subjects with a mean age of 54.1 years were included. The mean Lemperle wrinkle scale demonstrated a 40% decrease from 2.60 ± 0.60 at baseline to 1.55 ± 0.51 at week 8. The improvement rate was maintained at about 33% until week 12. The average maximum height of the wrinkle (Rz, μm), average skin roughness (Ra, μm), skin elasticity (R2, AU), facial curved length (mm), skin pore size (mm2 ), skin hydration (AU), TEWL (g/hm2 ), and skin glossiness (gloss value, AU) exhibited statistically significant improvements over time compared with the baseline measurements. No serious adverse effects or persistent adverse effects were reported, except for a transient subcutaneous nodule in one subject. CONCLUSIONS This study demonstrates that multiple microinjections of HA-based gel filler for facial skin aging are safe and effective in improving facial skin quality.
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Affiliation(s)
- Joo Hee Lee
- Department of Dermatology and Cutaneous Biology Research Institute, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Jemin Kim
- Scar Laser and Plastic Surgery Center, Yonsei Cancer Hospital, Yonsei University College of Medicine, Seoul, Korea
- Department of Dermatology, Yongin Severance Hospital, Yonsei University College of Medicine, Gyeonggi-do, Korea
| | - Yun Na Lee
- Department of Dermatology and Cutaneous Biology Research Institute, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Sooyeon Choi
- Department of Dermatology and Cutaneous Biology Research Institute, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Young In Lee
- Department of Dermatology and Cutaneous Biology Research Institute, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
- Scar Laser and Plastic Surgery Center, Yonsei Cancer Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Jangmi Suk
- Global Medical Research Center, Seoul, Korea
| | - Ju Hee Lee
- Department of Dermatology and Cutaneous Biology Research Institute, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
- Scar Laser and Plastic Surgery Center, Yonsei Cancer Hospital, Yonsei University College of Medicine, Seoul, Korea
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Aung NN, Pengnam S, Ngawhirunpat T, Rojanarata T, Patrojanasophon P, Opanasopit P, Pamornpathomkul B. Fabrication of polyvinyl pyrrolidone-K90/Eudragit RL100-based dissolving microneedle patches loaded with alpha-arbutin and resveratrol for skin depigmentation. Biomater Sci 2023. [PMID: 37183632 DOI: 10.1039/d3bm00132f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Alpha-arbutin (AA) and resveratrol (Res) are widely used in skin-lightening products. However, current topical formulations have minimal skin-lightening effects due to the low absorption and poor solubility of these active compounds. This study investigated the efficacy and safety of using dissolving microneedle (DMN) patches to improve the delivery of AA and Res for skin depigmentation. The DMN patches (F0-F3) fabricated from polyvinyl pyrrolidone-K90 (PVP-K90)/Eudragit RL100 blends successfully penetrated excised porcine skin and showed sufficient mechanical strength to resist compression forces. Loading DMNs with 10% AA and 2% Res at a ratio of 5 : 1 (F3) resulted in a synergistic interaction between the drugs with desirable dissolving ability, drug loading, and stability. Furthermore, both in vitro and in vivo studies revealed that the use of F3 DMN patches successfully enhanced the intradermal delivery of AA and Res over a 24 h period, with the delivered amount being higher (∼2.6 times) than that provided by a cream formulation (P < 0.05). After removing the DMN patches, the mice's skin was spontaneously and completely resealed within 12 h. In clinical studies, F3 DMN patches slightly decreased the melanin index of the participants without causing skin irritation or erythema at any time during the 24 h period when the patches were applied (P < 0.05). Moreover, application of the patches for 24 h was not found to affect skin hydration, transepidermal water loss, or skin elasticity. Therefore, AA/Res-loaded DMN patches could offer a promising approach for the effective local delivery of cosmetic agents for skin depigmentation.
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Affiliation(s)
- Nway Nway Aung
- Pharmaceutical Development of Green Innovations Group (PDGIG), Faculty of Pharmacy, Silpakorn University, Nakhon Pathom, 73000, Thailand.
- Pharmaceutical Factory, Kyaukse, Myanmar
| | - Supusson Pengnam
- Pharmaceutical Development of Green Innovations Group (PDGIG), Faculty of Pharmacy, Silpakorn University, Nakhon Pathom, 73000, Thailand.
| | - Tanasait Ngawhirunpat
- Pharmaceutical Development of Green Innovations Group (PDGIG), Faculty of Pharmacy, Silpakorn University, Nakhon Pathom, 73000, Thailand.
| | - Theerasak Rojanarata
- Pharmaceutical Development of Green Innovations Group (PDGIG), Faculty of Pharmacy, Silpakorn University, Nakhon Pathom, 73000, Thailand.
| | - Prasopchai Patrojanasophon
- Pharmaceutical Development of Green Innovations Group (PDGIG), Faculty of Pharmacy, Silpakorn University, Nakhon Pathom, 73000, Thailand.
| | - Praneet Opanasopit
- Pharmaceutical Development of Green Innovations Group (PDGIG), Faculty of Pharmacy, Silpakorn University, Nakhon Pathom, 73000, Thailand.
| | - Boonnada Pamornpathomkul
- Pharmaceutical Development of Green Innovations Group (PDGIG), Faculty of Pharmacy, Silpakorn University, Nakhon Pathom, 73000, Thailand.
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Metshein M, Tuulik VR, Tuulik V, Kumm M, Min M, Annus P. Electrical Bioimpedance Analysis for Evaluating the Effect of Pelotherapy on the Human Skin: Methodology and Experiments. SENSORS (BASEL, SWITZERLAND) 2023; 23:s23094251. [PMID: 37177455 PMCID: PMC10180821 DOI: 10.3390/s23094251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 04/05/2023] [Accepted: 04/23/2023] [Indexed: 05/15/2023]
Abstract
BACKGROUND Pelotherapy is the traditional procedure of applying curative muds on the skin's surface-shown to have a positive effect on the human body and cure illnesses. The effect of pelotherapy is complex, functioning through several mechanisms, and depends on the skin's functional condition. The current research objective was to develop a methodology and electrodes to assess the passage of the chemical and biologically active compounds of curative mud through human skin by performing electrical bioimpedance (EBI) analysis. METHODS The methodology included local area mud pack and simultaneous tap water compress application on the forearms with the comparison to the measurements of the dry skin. A custom-designed small-area gold-plated electrode on a rigid printed circuit board, in a tetrapolar configuration, was designed. A pilot study experiment with ten volunteers was performed. RESULTS Our results indicated the presence of an effect of pelotherapy, manifested by the varying electrical properties of the skin. Distinguishable difference in the measured real part of impedance (R) emerged, showing a very strong correlation between the dry and tap-water-treated skin (r = 0.941), while a poor correlation between the dry and mud-pack-treated skin (r = 0.166) appeared. The findings emerged exclusively in the frequency interval of 10 kHz …1 MHz and only for R. CONCLUSIONS EBI provides a promising tool for monitoring the variations in the electrical properties of the skin, including the skin barrier. We foresee developing smart devices for promoting the exploitation of spa therapies.
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Affiliation(s)
- Margus Metshein
- Thomas Johann Seebeck Department of Electronics, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, Estonia
| | - Varje-Riin Tuulik
- West Tallinn Central Hospital, Paldiski Mnt. 68, 10617 Tallinn, Estonia
- The Centre of Excellence in Health Promotion and Rehabilitation, Lihula Mnt. 12/1, 90507 Haapsalu, Estonia
| | - Viiu Tuulik
- The Centre of Excellence in Health Promotion and Rehabilitation, Lihula Mnt. 12/1, 90507 Haapsalu, Estonia
| | - Monika Kumm
- The Centre of Excellence in Health Promotion and Rehabilitation, Lihula Mnt. 12/1, 90507 Haapsalu, Estonia
- Pärnu College, University of Tartu, Ringi 35, 80012 Pärnu, Estonia
| | - Mart Min
- Thomas Johann Seebeck Department of Electronics, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, Estonia
| | - Paul Annus
- Thomas Johann Seebeck Department of Electronics, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, Estonia
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Todorov A, Torah R, Ardern-Jones MR, Beeby SP. Electromagnetic Sensing Techniques for Monitoring Atopic Dermatitis-Current Practices and Possible Advancements: A Review. SENSORS (BASEL, SWITZERLAND) 2023; 23:3935. [PMID: 37112275 PMCID: PMC10144024 DOI: 10.3390/s23083935] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/04/2023] [Revised: 03/29/2023] [Accepted: 04/04/2023] [Indexed: 06/19/2023]
Abstract
Atopic dermatitis (AD) is one of the most common skin disorders, affecting nearly one-fifth of children and adolescents worldwide, and currently, the only method of monitoring the condition is through an in-person visual examination by a clinician. This method of assessment poses an inherent risk of subjectivity and can be restrictive to patients who do not have access to or cannot visit hospitals. Advances in digital sensing technologies can serve as a foundation for the development of a new generation of e-health devices that provide accurate and empirical evaluation of the condition to patients worldwide. The goal of this review is to study the past, present, and future of AD monitoring. First, current medical practices such as biopsy, tape stripping and blood serum are discussed with their merits and demerits. Then, alternative digital methods of medical evaluation are highlighted with the focus on non-invasive monitoring using biomarkers of AD-TEWL, skin permittivity, elasticity, and pruritus. Finally, possible future technologies are showcased such as radio frequency reflectometry and optical spectroscopy along with a short discussion to provoke research into improving the current techniques and employing the new ones to develop an AD monitoring device, which could eventually facilitate medical diagnosis.
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Affiliation(s)
- Alexandar Todorov
- Centre of Flexible Electronics and E-Textiles, School of Electronics and Computer Science, University of Southampton, Southampton SO17 1BJ, UK
| | - Russel Torah
- Centre of Flexible Electronics and E-Textiles, School of Electronics and Computer Science, University of Southampton, Southampton SO17 1BJ, UK
| | - Michael R. Ardern-Jones
- Clinical Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton SO16 1DU, UK
| | - Steve P. Beeby
- Centre of Flexible Electronics and E-Textiles, School of Electronics and Computer Science, University of Southampton, Southampton SO17 1BJ, UK
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Moy M, Diaz I, Lesniak E, Giancola G. Peptide-pro complex serum: Investigating effects on aged skin. J Cosmet Dermatol 2023; 22:267-274. [PMID: 35426243 PMCID: PMC10084013 DOI: 10.1111/jocd.14992] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Revised: 01/11/2022] [Accepted: 04/05/2022] [Indexed: 01/24/2023]
Abstract
BACKGROUND Effective anti-aging treatments are an unmet consumer need. AIM Ex vivoand clinical tests have evaluated the efficacy of a topical facial serum containing a proprietary blend of neuropeptides, proteins, amino acids, and marine extracts on aged skin. METHODS In the ex vivo study the facial serum was compared to a commercially marketed face serum and to an untreated control on skin explants using microrelief, smoothness, and epidermal thickness endpoints. The 12 weeks monadic clinical study was designed for the test product to be used on the whole face. Subjects functioned as their own control; evaluating change from baseline. Skin was evaluated clinically by a Dermatologist for tolerability and for efficacy. Also part of the product assessment was skin hydration measurements, imaging, and a subject questionnaire. RESULTS The facial serum improved skin condition by significant reductions in skin surface area occupied by microfolds and in skin roughness. Additionally, it increased epidermal thickness as compared to the untreated control as well as the commercially marketed face serum. The facial serum provided a statistically increased skin moisturization compared to pretreatment values. Dermatological evaluation of the skin concluded that there were statistically and clinically significant improvements in skin smoothness, wrinkles severity, fine lines visibility and lifting, and tightening effects at crow's feet area, forehead, and upper lip. CONCLUSION A facial serum, containing a proprietary blend of neuropeptides, proteins, amino acids, and marine extracts, has been shown to improve the overall quality of aged skin in a series of ex vivo and clinical tests.
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Affiliation(s)
- Melissa Moy
- Research and Development, Colgate-Palmolive Company, Piscataway, New Jersey, USA
| | - Isabel Diaz
- Dermal Clinical Research, Colgate-Palmolive Company, Piscataway, New Jersey, USA
| | - Ewelina Lesniak
- Research and Development, Colgate-Palmolive Company, Piscataway, New Jersey, USA
| | - Giorgiana Giancola
- Scientific Affairs, Colgate-Palmolive Company, Piscataway, New Jersey, USA
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Madhvapathy SR, Arafa HM, Patel M, Winograd J, Kong J, Zhu J, Xu S, Rogers JA. Advanced thermal sensing techniques for characterizing the physical properties of skin. APPLIED PHYSICS REVIEWS 2022; 9:041307. [PMID: 36467868 PMCID: PMC9677811 DOI: 10.1063/5.0095157] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Accepted: 09/15/2022] [Indexed: 06/17/2023]
Abstract
Measurements of the thermal properties of the skin can serve as the basis for a noninvasive, quantitative characterization of dermatological health and physiological status. Applications range from the detection of subtle spatiotemporal changes in skin temperature associated with thermoregulatory processes, to the evaluation of depth-dependent compositional properties and hydration levels, to the assessment of various features of microvascular/macrovascular blood flow. Examples of recent advances for performing such measurements include thin, skin-interfaced systems that enable continuous, real-time monitoring of the intrinsic thermal properties of the skin beyond its superficial layers, with a path to reliable, inexpensive instruments that offer potential for widespread use as diagnostic tools in clinical settings or in the home. This paper reviews the foundational aspects of the latest thermal sensing techniques with applicability to the skin, summarizes the various devices that exploit these concepts, and provides an overview of specific areas of application in the context of skin health. A concluding section presents an outlook on the challenges and prospects for research in this field.
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Gidado IM, Qassem M, Triantis IF, Kyriacou PA. Review of Advances in the Measurement of Skin Hydration Based on Sensing of Optical and Electrical Tissue Properties. SENSORS (BASEL, SWITZERLAND) 2022; 22:s22197151. [PMID: 36236250 PMCID: PMC9571519 DOI: 10.3390/s22197151] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 09/12/2022] [Accepted: 09/14/2022] [Indexed: 05/14/2023]
Abstract
The presence of water in the skin is crucial for maintaining the properties and functions of the skin, in particular its outermost layer, known as the stratum corneum, which consists of a lipid barrier. External exposures can affect the skin's hydration levels and in turn, alter its mechanical and physical properties. Monitoring these alterations in the skin's water content can be applicable in clinical, cosmetic, athletic and personal settings. Many techniques measuring this parameter have been investigated, with electrical-based methods currently being widely used in commercial devices. Furthermore, the exploration of optical techniques to measure hydration is growing due to the outcomes observed through the penetration of light at differing levels. This paper comprehensively reviews such measurement techniques, focusing on recent experimental studies and state-of-the-art devices.
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11
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Jang M, Kim HD, Koo HJ, So JH. Textile-Based Wearable Sensor for Skin Hydration Monitoring. SENSORS (BASEL, SWITZERLAND) 2022; 22:s22186985. [PMID: 36146334 PMCID: PMC9500932 DOI: 10.3390/s22186985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 09/09/2022] [Accepted: 09/13/2022] [Indexed: 05/14/2023]
Abstract
This research describes a wearable skin hydration sensor based on cotton textile to determine the state of hydration within the skin via impedance analysis. The sensor structure comprises a textile substrate, thermoplastic over-layer, conductive patterns, and encapsulant, designed for stable and reliable monitoring of the skin's impedance change in relation to hydration level. The porcine skin with different hydration levels was prepared as a model system of the skin, and the textile-based sensor carefully investigated the porcine skin samples' impedance characteristics. The impedance study reveals that (1) the total impedance of skin decreases as its hydration level increases, and (2) the impedance of the stratum corneum and epidermis layers are more dominantly affected by the hydration level of the skin than the dermis layer. Even after repetitive bending cycles, the impedance data of skin measured by the sensor exhibit a reliable dependence on the skin hydration level, which validates the flexibility and durability of the sensor. Finally, it is shown that the textile-based skin hydration sensor can detect various body parts' different hydration levels of human skin while maintaining a stable conformal contact with the skin. The resulting data are well-matched with the readings from a commercial skin hydration sensor.
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Affiliation(s)
- Minju Jang
- Material & Component Convergence R&D Department, Korea Institute of Industrial Technology, 143 Hanggaul-ro, Sangnok-gu, Ansan 15588, Korea
- Department of Fiber System Engineering, Dankook University, 152 Jukjeon-ro, Suji-gu, Yongin 16890, Korea
| | - Ho-Dong Kim
- Department of Fiber System Engineering, Dankook University, 152 Jukjeon-ro, Suji-gu, Yongin 16890, Korea
| | - Hyung-Jun Koo
- Department of Chemical & Biomolecular Engineering, Seoul National University of Science & Technology, 232 Gongneung-ro, Nowon-gu, Seoul 01811, Korea
- Department of New and Renewable Energy Convergence, Seoul National University of Science & Technology, 232 Gongneung-ro, Nowon-gu, Seoul 01811, Korea
- Correspondence: (H.-J.K.); (J.-H.S.)
| | - Ju-Hee So
- Material & Component Convergence R&D Department, Korea Institute of Industrial Technology, 143 Hanggaul-ro, Sangnok-gu, Ansan 15588, Korea
- Correspondence: (H.-J.K.); (J.-H.S.)
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Chaboyer W, Coyer F, Harbeck E, Thalib L, Latimer S, Wan CS, Tobiano G, Griffin BR, Campbell JL, Walker R, Carlini JJ, Lockwood I, Clark J, Gillespie BM. Oedema as a predictor of the incidence of new pressure injuries in adults in any care setting: A systematic review and meta-analysis. Int J Nurs Stud 2022; 128:104189. [PMID: 35217433 DOI: 10.1016/j.ijnurstu.2022.104189] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 01/27/2022] [Accepted: 01/29/2022] [Indexed: 02/07/2023]
Abstract
BACKGROUND Oedema measurement, also termed sub-epidermal moisture measurement is recommended as an adjunct pressure injury prevention intervention in international guidelines because it indicates early tissue damage. OBJECTIVE To determine the prognostic value of oedema measurement in predicting future pressure injury in adults in any care setting. DESIGN Systematic review and meta-analysis. SETTING Participants were recruited from nursing homes or aged care facilities, hospitals, or post-acute facilities. PARTICIPANTS Adults. METHODS A modified 2-week systematic review was undertaken. Study designs included cohort (prospective and retrospective), case-control, case series if relevant comparisons were reported, randomised controlled trials if the association between oedema measurement and pressure injury was reported, and registry data. Databases searched included: Medical Literature Analysis and Retrieval System Online, The Cumulative Index to Nursing and Allied Health Literature, Excerpta Medica and the Cochrane Library from inception to 13 July 2021 with no language restrictions. Screening, data extraction using Checklist for Critical Appraisal and Data Extraction for Systematic Reviews of Prediction Modelling Studies - Prognostic Factors (CHARMS-PF) and quality assessment using Quality in Prognostic Factor Studies (QUIPS) were undertaken independently by ≥2 authors and adjudicated by another if required. Meta-analyses and meta-regression were undertaken. The certainty of the evidence was assessed using the Grading of Recommendations Assessment, Development and Evaluation (GRADE) approach. RESULTS Six studies (n = 483 total) were included. Two studies were set in nursing homes and four in either hospitals or post-acute facilities. Fives studies were prospective cohorts, and one was a randomised control trial. Two studies were assessed as low risk and four studies as moderate risk of bias. The pooled risk ratio in four studies (n = 388) for the relationship between oedema and pressure injury cumulative incidence was 18.87 (95% CI 2.13-38.29) and for time to pressure injury was 4.08 days (95% CI 1.64-6.52). Using GRADE, the certainty of the body of evidence was low for all outcomes. Meta-regression indicated that age, gender, and sample size were poor predictors for the association between oedema and pressure injury. CONCLUSIONS Measuring oedema as a predictor for pressure injury development is showing promise but a stronger body of evidence that takes into consideration other prognostic factors is needed to better understand its benefit. REGISTRATION PROSPERO CRD42021267834. TWEETABLE ABSTRACT Measuring oedema is a promising strategy to prevent pressure injuries but the certainty of evidence for this claim is low.
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Affiliation(s)
- Wendy Chaboyer
- Menzies Health Institute Queensland, Griffith University Gold Coast Campus, Griffith University, Building G01, Gold Coast, Queensland 4222, Australia.
| | - Fiona Coyer
- School of Nursing, Centre for Healthcare Transformation, Queensland University of Technology, Brisbane, Australia; Intensive Care Services, Royal Brisbane and Women's Hospital, Brisbane, Australia
| | - Emma Harbeck
- Menzies Health Institute Queensland, Griffith University Gold Coast Campus, Griffith University, Building G01, Gold Coast, Queensland 4222, Australia
| | - Lukman Thalib
- Department of Biostatistics Faculty of Medicine, Istanbul Aydin University, Istanbul, Turkey
| | - Sharon Latimer
- Menzies Health Institute Queensland, Griffith University Gold Coast Campus, Griffith University, Building G01, Gold Coast, Queensland 4222, Australia
| | - Ching Shan Wan
- Nursing Research Institute, St Vincent's Health Network Sydney, Australia; St Vincent's Hospital Melbourne, Australia; Australian Catholic University, Melbourne, Australia.
| | - Georgia Tobiano
- Menzies Health Institute Queensland, Griffith University Gold Coast Campus, Griffith University, Building G01, Gold Coast, Queensland 4222, Australia; Gold Coast University Hospital, Gold Coast, Australia.
| | - Bronwyn R Griffin
- Menzies Health Institute Queensland, Griffith University Gold Coast Campus, Griffith University, Building G01, Gold Coast, Queensland 4222, Australia.
| | - Jill L Campbell
- Menzies Health Institute Queensland, Griffith University Gold Coast Campus, Griffith University, Building G01, Gold Coast, Queensland 4222, Australia.
| | - Rachel Walker
- Menzies Health Institute Queensland, Griffith University Gold Coast Campus, Griffith University, Building G01, Gold Coast, Queensland 4222, Australia; The Princess Alexandra Hospital, Brisbane, Australia.
| | - Joan J Carlini
- Menzies Health Institute Queensland, Griffith University Gold Coast Campus, Griffith University, Building G01, Gold Coast, Queensland 4222, Australia; Griffith Business School, Griffith University, Gold Coast, Australia.
| | - Ishtar Lockwood
- Menzies Health Institute Queensland, Griffith University Gold Coast Campus, Griffith University, Building G01, Gold Coast, Queensland 4222, Australia
| | - Justin Clark
- Institute for Evidence-Based Healthcare, Bond University, Gold Coast, Australia
| | - Brigid M Gillespie
- Menzies Health Institute Queensland, Griffith University Gold Coast Campus, Griffith University, Building G01, Gold Coast, Queensland 4222, Australia; Gold Coast University Hospital, Gold Coast, Australia.
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13
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Budylin GS, Davydov DA, Zlobina NV, Baev AV, Artyushenko VG, Yakimov BP, Shirshin EA. In vivo sensing of cutaneous edema: A comparative study of diffuse reflectance, Raman spectroscopy and multispectral imaging. JOURNAL OF BIOPHOTONICS 2022; 15:e202100268. [PMID: 34661967 DOI: 10.1002/jbio.202100268] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 10/11/2021] [Accepted: 10/12/2021] [Indexed: 06/13/2023]
Abstract
Quantitative noninvasive assessment of water content in tissues is important for biomedicine. Optical spectroscopy is potentially capable of solving this problem; however, its applicability for clinical diagnostics remains questionable. The presented study compares diffuse reflectance spectroscopy, Raman spectroscopy and multispectral imaging in the characterization of cutaneous edema. The source-detector geometries for each method are selected based on Monte Carlo simulations results to detect the signal from the dermis. Then, the kinetics of the edema development is studied for two models. All methods demonstrate synchronous trends for histamine-induced edema: The water content reaches a maximum of 1 hour after histamine application and then gradually decreases. For the venous occlusion, a 51% increase in water content is observed with Raman spectroscopy. The differences in water content estimation by three methods are explained based on the light propagation model. The obtained results are essential for introducing quantitative optical water measurement technology to the clinics.
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Affiliation(s)
- Gleb S Budylin
- Medical Research and Education Center, M. V. Lomonosov Moscow State University, Moscow, Russia
- Institute of Spectroscopy of the Russian Academy of Sciences, Moscow, Russia
- World-Class Research Center "Digital Biodesign and Personalized Healthcare", Sechenov First Moscow State Medical University, Moscow, Russia
| | - Denis A Davydov
- Medical Research and Education Center, M. V. Lomonosov Moscow State University, Moscow, Russia
- Faculty of Physics, Lomonosov Moscow State University, Moscow, Russia
| | - Nadezhda V Zlobina
- Medical Research and Education Center, M. V. Lomonosov Moscow State University, Moscow, Russia
- Faculty of Physics, Lomonosov Moscow State University, Moscow, Russia
| | - Alexey V Baev
- Faculty of Physics, Lomonosov Moscow State University, Moscow, Russia
| | | | - Boris P Yakimov
- Medical Research and Education Center, M. V. Lomonosov Moscow State University, Moscow, Russia
- World-Class Research Center "Digital Biodesign and Personalized Healthcare", Sechenov First Moscow State Medical University, Moscow, Russia
- Faculty of Physics, Lomonosov Moscow State University, Moscow, Russia
| | - Evgeny A Shirshin
- Medical Research and Education Center, M. V. Lomonosov Moscow State University, Moscow, Russia
- World-Class Research Center "Digital Biodesign and Personalized Healthcare", Sechenov First Moscow State Medical University, Moscow, Russia
- Faculty of Physics, Lomonosov Moscow State University, Moscow, Russia
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14
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Mourelle ML, Gómez CP, Legido JL. Microalgal Peloids for Cosmetic and Wellness Uses. Mar Drugs 2021; 19:666. [PMID: 34940665 PMCID: PMC8705130 DOI: 10.3390/md19120666] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Revised: 11/14/2021] [Accepted: 11/24/2021] [Indexed: 01/01/2023] Open
Abstract
Peloids have been used for therapeutic purposes since time immemorial, mainly in the treatment of locomotor system pathologies and dermatology. Their effects are attributed to their components, i.e., to the properties and action of mineral waters, clays, and their biological fraction, which may be made up of microalgae, cyanobacteria, and other organisms present in water and clays. There are many studies on the therapeutic use of peloids made with microalgae/cyanobacteria, but very little research has been done on dermocosmetic applications. Such research demonstrates their potential as soothing, regenerating, antioxidant, anti-inflammatory, and antimicrobial agents. In this work, a method for the manufacture of a dermocosmetic peloid is presented based on the experience of the authors and existing publications, with indications for its characterization and study of its efficacy.
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Affiliation(s)
- M. Lourdes Mourelle
- FA2 Research Group, Applied Physics Department, University of Vigo, 36310 Vigo, Spain; (C.P.G.); (J.L.L.)
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15
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Alves E, Gregório J, Baby AR, Rijo P, Rodrigues LM, Rosado C. Homemade Kefir Consumption Improves Skin Condition-A Study Conducted in Healthy and Atopic Volunteers. Foods 2021; 10:foods10112794. [PMID: 34829075 PMCID: PMC8622502 DOI: 10.3390/foods10112794] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 11/09/2021] [Accepted: 11/11/2021] [Indexed: 12/12/2022] Open
Abstract
Diet has a fundamental role in the homeostasis of bodily functions, including the skin, which, as an essential protective barrier, plays a crucial role in this balance. The skin and intestine appear to share a series of indirect metabolic pathways, in a dual relationship known as the “gut-skin axis”. Hence, the gut-skin axis might be receptive to modulation via dietary modification, where probiotics can be included, thus representing a potential therapeutic target in inflammatory skin diseases, such as atopic dermatitis (AD), in order to control and/or ameliorate symptoms. Kefir is one of the most ancient fermented foods, with probiotic characteristics that have been associated with a wide variety of health-promoting benefits, and it presents a microbiological diversity that makes its application as a probiotic in the gut-skin relationship of the utmost interest. However, the impact of a diet containing kefir on skin health has yet to be reported in scientific literature. This study aimed to assess the impact of the intake of homemade kefir in the skin of healthy and atopic volunteers. The intervention resulted in a boost on barrier function in both skin types verified only in the respective kefir intake groups. An improvement in the degree of severity of AD was also confirmed for the kefir intake group. Atopic individuals may benefit from kefir intake, especially in regard to their skin hydration. Finally, the effects observed on skin barrier function in this study probably culminate from the effects of all the ingredients in kefir, including the complex microbiota, its metabolites and macro- and micronutrients resulting from the fermentation. This work opens the way for more advanced research on the impact of the probiotic kefir on cutaneous health, further clarifying its mechanism of action namely via gut-skin axis.
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Affiliation(s)
- Emília Alves
- CBIOS—Universidade Lusófona’s Research Center for Biosciences & Health Technologies, Campo Grande 376, 1749-024 Lisboa, Portugal; (E.A.); (J.G.); (P.R.)
- Department of Biomedical Sciences, Faculty of Pharmacy, University of Alcalá, Carretera Madrid-Barcelona, Km 33.100, 28805 Alcalá de Henares, Spain
| | - João Gregório
- CBIOS—Universidade Lusófona’s Research Center for Biosciences & Health Technologies, Campo Grande 376, 1749-024 Lisboa, Portugal; (E.A.); (J.G.); (P.R.)
| | - André Rolim Baby
- Department of Pharmacy, Faculty of Pharmaceutical Pharmacy, University of São Paulo, São Paulo 05508-000, Brazil;
| | - Patrícia Rijo
- CBIOS—Universidade Lusófona’s Research Center for Biosciences & Health Technologies, Campo Grande 376, 1749-024 Lisboa, Portugal; (E.A.); (J.G.); (P.R.)
- Instituto de Investigação do Medicamento (iMed.ULisboa), Faculdade de Farmácia, Universidade de Lisboa, 1649-003 Lisboa, Portugal
| | - Luis M. Rodrigues
- CBIOS—Universidade Lusófona’s Research Center for Biosciences & Health Technologies, Campo Grande 376, 1749-024 Lisboa, Portugal; (E.A.); (J.G.); (P.R.)
- Correspondence: (L.M.R.); (C.R.)
| | - Catarina Rosado
- CBIOS—Universidade Lusófona’s Research Center for Biosciences & Health Technologies, Campo Grande 376, 1749-024 Lisboa, Portugal; (E.A.); (J.G.); (P.R.)
- Correspondence: (L.M.R.); (C.R.)
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16
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Kimoto A, Yonekawa F, Kawasoe T. Skin moisture measurement on stripping and pasted water by a handy-type electrostatic sensor. Skin Res Technol 2021; 28:274-279. [PMID: 34751483 PMCID: PMC9907589 DOI: 10.1111/srt.13125] [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: 01/09/2021] [Accepted: 10/16/2021] [Indexed: 11/30/2022]
Abstract
BACKGROUND There is a need to develop a new device to evaluate and monitor the condition of human skin and make it possible to measure the skin in the diary because the current accuracy of water content measurement in the stratum corneum by capacitance and conductance measurement sensor that are used as the gold standard is insufficient. MATERIALS AND METHODS The electrostatic sensor is composed of a thin silicone gum sheet and a copper film. In the experiment, skin conditions on six positions such as the forearm, upper arm, and face of a test subject before and after tape stripping are measured by the electrostatic sensor and a commercial sensor. Skin conditions on the forearm of five subjects before and after pasted distilled water were measured by their sensors. RESULTS The voltages measured by the electrostatic sensor and moisture measured by a commercial sensor are increased with P < 0.01 before and after skin stripping. There were increases in the voltage and the moisture with P < 0.01 before and after pasted distilled water. CONCLUSION It is suggested that it is possible to measure the moisture on the upper layer of the skin by the electrostatic sensor.
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Affiliation(s)
- Akira Kimoto
- Faculty of Science and Engineering, Saga University, 1 Honjo-machi, Saga, 840-8502, Japan
| | - Fumiaki Yonekawa
- Faculty of Science and Engineering, Saga University, 1 Honjo-machi, Saga, 840-8502, Japan
| | - Tomoyuki Kawasoe
- Center for Education and Innovation, Sojo University, 4-22-1 Ikeda, Nishi-ku, Kumamoto City, 860-0082, Japan
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17
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Wireless, soft electronics for rapid, multisensor measurements of hydration levels in healthy and diseased skin. Proc Natl Acad Sci U S A 2021; 118:2020398118. [PMID: 33468630 PMCID: PMC7865173 DOI: 10.1073/pnas.2020398118] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Precise, quantitative measurements of the hydration status of skin can yield important insights into dermatological health and skin structure and function, with additional relevance to essential processes of thermoregulation and other features of basic physiology. Existing tools for determining skin water content exploit surrogate electrical assessments performed with bulky, rigid, and expensive instruments that are difficult to use in a repeatable manner. Recent alternatives exploit thermal measurements using soft wireless devices that adhere gently and noninvasively to the surface of the skin, but with limited operating range (∼1 cm) and high sensitivity to subtle environmental fluctuations. This paper introduces a set of ideas and technologies that overcome these drawbacks to enable high-speed, robust, long-range automated measurements of thermal transport properties via a miniaturized, multisensor module controlled by a long-range (∼10 m) Bluetooth Low Energy system on a chip, with a graphical user interface to standard smartphones. Soft contact to the surface of the skin, with almost zero user burden, yields recordings that can be quantitatively connected to hydration levels of both the epidermis and dermis, using computational modeling techniques, with high levels of repeatability and insensitivity to ambient fluctuations in temperature. Systematic studies of polymers in layered configurations similar to those of human skin, of porcine skin with known levels of hydration, and of human subjects with benchmarks against clinical devices validate the measurement approach and associated sensor hardware. The results support capabilities in characterizing skin barrier function, assessing severity of skin diseases, and evaluating cosmetic and medication efficacy, for use in the clinic or in the home.
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18
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Design and Analysis of a Continuous and Non-Invasive Multi-Wavelength Optical Sensor for Measurement of Dermal Water Content. SENSORS 2021; 21:s21062162. [PMID: 33808821 PMCID: PMC8003651 DOI: 10.3390/s21062162] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 03/13/2021] [Accepted: 03/16/2021] [Indexed: 12/19/2022]
Abstract
Dermal water content is an important biophysical parameter in preserving skin integrity and preventing skin damage. Traditional electrical-based and open-chamber evaporimeters have several well-known limitations. In particular, such devices are costly, sizeable, and only provide arbitrary outputs. They also do not permit continuous and non-invasive monitoring of dermal water content, which can be beneficial for various consumer, clinical, and cosmetic purposes. We report here on the design and development of a digital multi-wavelength optical sensor that performs continuous and non-invasive measurement of dermal water content. In silico investigation on porcine skin was carried out using the Monte Carlo modeling strategy to evaluate the feasibility and characterize the sensor. Subsequently, an in vitro experiment was carried out to evaluate the performance of the sensor and benchmark its accuracy against a high-end, broad band spectrophotometer. Reference measurements were made against gravimetric analysis. The results demonstrate that the developed sensor can deliver accurate, continuous, and non-invasive measurement of skin hydration through measurement of dermal water content. Remarkably, the novel design of the sensor exceeded the performance of the high-end spectrophotometer due to the important denoising effects of temporal averaging. The authors believe, in addition to wellbeing and skin health monitoring, the designed sensor can particularly facilitate disease management in patients presenting diabetes mellitus, hypothyroidism, malnutrition, and atopic dermatitis.
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19
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In Vivo Assessment of Water Content, Trans-Epidermial Water Loss and Thickness in Human Facial Skin. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10176139] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Mapping facial skin in terms of its biophysical properties plays a fundamental role in many practical applications, including, among others, forensics, medical and beauty treatments, and cosmetic and restorative surgery. In this paper we present an in vivo evaluation of the water content, trans-epidermial water loss and skin thickness in six areas of the human face: cheeks, chin, forehead, lips, neck and nose. The experiments were performed on a population of healthy subjects through innovative sensing devices which enable fast yet accurate evaluations of the above parameters. A statistical analysis was carried out to determine significant differences between the facial areas investigated and clusters of statistically-indistinguishable areas. We found that water content was higher in the cheeks and neck and lower in the lips, whereas trans-epidermal water loss had higher values for the lips and lower ones for the neck. In terms of thickness the dermis exhibited three clusters, which, from thickest to thinnest were: chin and nose, cheek and forehead and lips and neck. The epidermis showed the same three clusters too, but with a different ordering in term of thickness. Finally, the stratum corneum presented two clusters: the thickest, formed by lips and neck, and the thinnest, formed by all the remaining areas. The results of this investigation can provide valuable guidelines for the evaluation of skin moisturisers and other cosmetic products, and can help guide choices in re-constructive/cosmetic surgery.
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20
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Aguirre-Cruz G, León-López A, Cruz-Gómez V, Jiménez-Alvarado R, Aguirre-Álvarez G. Collagen Hydrolysates for Skin Protection: Oral Administration and Topical Formulation. Antioxidants (Basel) 2020; 9:antiox9020181. [PMID: 32098294 PMCID: PMC7070905 DOI: 10.3390/antiox9020181] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 02/19/2020] [Accepted: 02/19/2020] [Indexed: 02/06/2023] Open
Abstract
Antioxidants are molecules that delay or inhibit the oxidation of other molecules. Its use significantly increased in recent years in the diet of people. Natural antioxidants are replacing the use of synthetic antioxidant ingredients due to their safety, nutritional, and therapeutic values. Hydrolyzed collagen (HC) is a popular ingredient considered to be an antioxidant. This low molecular weight protein has been widely utilized due to its excellent biocompatibility, easy biodegradability, and weak antigenicity. It is a safe cosmetic biomaterial with good moisturizing properties on the skin. The antioxidant properties of HC are conditioned to the size of the molecule: the lower the molecular weight of peptides, the greater the ability to donate an electron or hydrogen to stabilize radicals. The antioxidant capacity of HC is mostly due to the presence of hydrophobic amino acids in the peptide. The exact mechanism of peptides acting as antioxidants is not clearly known but some aromatic amino acids and histidine are reported to play an important role in the antioxidant activity. Oral ingestion of HC increases the levels of collagen-derived peptides in the blood torrent and improves the skin properties such as elasticity, skin moisture, and transepidermal water loss. Additionally, daily intakes of HC protect the skin against UV melasma, enhances the fibroblast production and extracellular matrix of the skin. HC has been identified as a safe cosmetic ingredient for topical formulations with good moisturizing properties at the stratum corneum layer of the skin. It reduces the effects of skin aging (dryness, laxity, and wrinkles). The use of HC as a principal ingredient in safe formulations for skin protection was reviewed and compared when it is used by topical and/or oral administration.
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Affiliation(s)
- Gabriel Aguirre-Cruz
- Uni-Collagen S.A. de C.V., Arnulfo González No. 203, El Paraíso, C.P. 43684 Tulancingo, Hidalgo, Mexico; (G.A.-C.); (V.C.-G.)
| | - Arely León-López
- Instituto de Ciencias Agropecuarias, Universidad Autónoma del Estado de Hidalgo, Av. Universidad Km. 1, C.P. 43600 Tulancingo, Hidalgo, Mexico; (A.L.-L.); (R.J.-A.)
| | - Verónica Cruz-Gómez
- Uni-Collagen S.A. de C.V., Arnulfo González No. 203, El Paraíso, C.P. 43684 Tulancingo, Hidalgo, Mexico; (G.A.-C.); (V.C.-G.)
| | - Rubén Jiménez-Alvarado
- Instituto de Ciencias Agropecuarias, Universidad Autónoma del Estado de Hidalgo, Av. Universidad Km. 1, C.P. 43600 Tulancingo, Hidalgo, Mexico; (A.L.-L.); (R.J.-A.)
| | - Gabriel Aguirre-Álvarez
- Uni-Collagen S.A. de C.V., Arnulfo González No. 203, El Paraíso, C.P. 43684 Tulancingo, Hidalgo, Mexico; (G.A.-C.); (V.C.-G.)
- Instituto de Ciencias Agropecuarias, Universidad Autónoma del Estado de Hidalgo, Av. Universidad Km. 1, C.P. 43600 Tulancingo, Hidalgo, Mexico; (A.L.-L.); (R.J.-A.)
- Correspondence: ; Tel.: +52-7751459265
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Choe C, Schleusener J, Choe S, Lademann J, Darvin ME. A modification for the calculation of water depth profiles in oil-treated skin by in vivo confocal Raman microscopy. JOURNAL OF BIOPHOTONICS 2020; 13:e201960106. [PMID: 31602797 DOI: 10.1002/jbio.201960106] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Revised: 09/30/2019] [Accepted: 10/06/2019] [Indexed: 06/10/2023]
Abstract
In this study, an extended calculation method for the determination of the water profiles in oil-treated skin is proposed, which is based on the calculation of the ratio between the Raman band intensities of water (3350-3550 cm-1 ) and keratin Amide I at 1650 cm-1 . The proposed method is compared with the conventional method based on the ratio of the Raman band intensities of water (3350-3550 cm-1 ) and keratin at 2930 cm-1 . The conventional method creates artifacts in the depth profiles of the water concentration in oil-treated skin, showing a lower amount of water in the upper and intermediate layers of the stratum corneum, which is due to the superposition of oil- and keratin-related Raman bands at 2930 cm-1 . The proposed extended method shows no artifacts and has the potential to determine the water depth profiles after topical application of formulations on the skin.
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Affiliation(s)
- Chunsik Choe
- Biomedical Materials Division, Faculty of Material Science, Kim Il Sung University, Pyongyang, DPR Korea
| | - Johannes Schleusener
- Department of Dermatology, Venerology and Allergology, Center of Experimental and Applied Cutaneous Physiology, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Sehyok Choe
- Biomedical Materials Division, Faculty of Material Science, Kim Il Sung University, Pyongyang, DPR Korea
| | - Jürgen Lademann
- Department of Dermatology, Venerology and Allergology, Center of Experimental and Applied Cutaneous Physiology, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Maxim E Darvin
- Department of Dermatology, Venerology and Allergology, Center of Experimental and Applied Cutaneous Physiology, Charité Universitätsmedizin Berlin, Berlin, Germany
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