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1.
Skin Res Technol ; 30(4): e13666, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38606717

RESUMO

BACKGROUND: It is known that heparinoid, a mucopolysaccharide polysulfate, is effective in improving rough skin and promoting blood circulation as medicines for diseased areas. However, heparinoid has a molecular weight of more than 5000 and cannot penetrate healthy stratum corneum. OBJECTIVE: We tested the efficacy of sulfated oligosaccharides with a molecular weight of less than 2000 on the human skin barrier function and moisturizing function. METHODS: We measured the transepidermal water loss (TEWL) of a three-dimensional human epidermis model cultured for 3 days after topical application of sulfated oligosaccharides, then observed the effects on TEWL suppression. The mRNA levels of proteins involved in intercellular lipid transport and storage in the stratum corneum, and moisture retention were measured using RT-qPCR. RESULTS: An increase in the mRNA levels of the ATP-binding cassette subfamily A member 12 (ABCA12), which transports lipids into stratum granulosum, was confirmed. Increases were also observed in the mRNA levels of filaggrin (FLG), which is involved in the generation of natural moisturizing factors, and of caspase-14, calpain-1 and bleomycin hydrolase, which are involved in the degradation of FLG. Antibody staining confirmed that the application of sodium trehalose sulfate to 3D model skin resulted in more ABCA12, ceramide, transglutaminase1, and FLG than those in controls. In a randomized, placebo-controlled, double-blind study, participants with low stratum corneum water content applied a lotion and emulsion containing sodium trehalose sulfate to their faces for 4 weeks. Sodium trehalose sulfate decreased the TEWL and increased the stratum corneum water content. CONCLUSION: These results suggest that cosmetics containing sodium trehalose sulfate act on the epidermis by increasing barrier factors and moisturizing factors, thereby ameliorating dry skin.


Assuntos
Heparinoides , Trealose , Humanos , Trealose/farmacologia , Trealose/metabolismo , Heparinoides/metabolismo , Heparinoides/farmacologia , Pele/metabolismo , Epiderme/metabolismo , Higiene da Pele , Água/metabolismo , RNA Mensageiro/metabolismo , Sódio/metabolismo , Sódio/farmacologia
2.
Crit Rev Ther Drug Carrier Syst ; 41(5): 65-110, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38608133

RESUMO

Cosmeceuticals have gained great importance and are among the top-selling products used for skin care. Because of changing lifestyles, climate, and increasing pollution, cosmeceuticals are utilized by every individual, thereby making cosmeceuticals a fruitful field for research and the economy. Cosmeceuticals provide incredibly pleasing aesthetic results by fusing the qualities of both cosmetics and medicinal substances. Cosmeceuticals are primarily utilized to improve the appearance of skin by making it smoother, moisturized, and wrinkle-free, in addition to treating dermatological conditions, including photoaging, burns, dandruff, acne, eczema, and erythema. Nanocosmeceuticals are cosmetic products that combine therapeutic effects utilizing nanotechnology, allowing for more precise and effective target-specific delivery of active ingredients, and improving bioavailability.


Assuntos
Acne Vulgar , Cosmecêuticos , Humanos , Higiene da Pele , Pele , Nanotecnologia
3.
Int Wound J ; 21(4): e14871, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38591160

RESUMO

Pressure ulcers including heel ulcers remain a global healthcare concern. This study comprehensively evaluates the biomechanical effectiveness of the market-popular ALLEVYN® LIFE multilayer dressing in preventing heel ulcers. It focuses on the contribution of the frictional sliding occurring between the non-bonded, fully independent layers of this dressing type when the dressing is protecting the body from friction and shear. The layer-on-layer sliding phenomenon, which this dressing design enables, named here the frictional energy absorber effectiveness (FEAE), absorbs approximately 30%-45% of the mechanical energy resulting from the foot weight, friction and shear acting to distort soft tissues in a supine position, thereby reducing the risk of heel ulcers. Introducing the novel theoretical FEAE formulation, new laboratory methods to quantify the FEAE and a review of relevant clinical studies, this research underlines the importance of the FEAE in protecting the heels of at-risk patients. The work builds on a decade of research published by our group in analysing and evaluating dressing designs for pressure ulcer prevention and will be useful for clinicians, manufacturers, regulators and reimbursing bodies in assessing the effectiveness of dressings indicated or considered for prophylactic use.


Assuntos
Lesão por Pressão , Humanos , Lesão por Pressão/prevenção & controle , Fricção , Úlcera , Bandagens , Higiene da Pele , Calcanhar
4.
J Drugs Dermatol ; 23(4): 244-248, 2024 Apr 01.
Artigo em Inglês | MEDLINE | ID: mdl-38564396

RESUMO

Initially categorized as primarily a respiratory disease, COVID-19 can involve other organ systems and may have direct skin manifestations, including exanthems, morbilliform eruption, generalized urticaria, or pseudo-chilblains —commonly called “COVID Toes.” Frequent handwashing and prolonged wearing of face masks and shields in efforts to minimize transmission of SARS-CoV-2, the novel coronavirus that causes COVID, has given rise to indirect skin manifestations of COVID. “Maskne” and handwashing dermatitis are particularly common among healthcare workers. Characterized by skin inflammation, dryness, pruritus, and other symptoms, these conditions are fundamentally disorders of skin barrier dysfunction. This dysfunction may result from the combination of mechanical skin damage, changes in skin pH, reductions in skin lipids attributable to protection measures, and local alterations in the cutaneous microbiome. Strategies to manage these conditions focus on reversing and repairing skin barrier damage with preventative general measures, optimized skin care with the selection of proper products, eliminating irritant exposures, and avoiding certain medications, such as topical corticosteroids, that may further impair barrier function despite temporary improvement in signs and symptoms. J Drugs Dermatol. 2024;23(4):  doi:10.36849/JDD.7862.


Assuntos
COVID-19 , Dermatopatias , Humanos , COVID-19/prevenção & controle , SARS-CoV-2 , Pele , Higiene da Pele
5.
J Drugs Dermatol ; 23(4): 227-232, 2024 Apr 01.
Artigo em Inglês | MEDLINE | ID: mdl-38564400

RESUMO

BACKGROUND: The most rapidly increasing medical aesthetic procedures for facial antiaging comprise nonenergy and injectable treatments. Currently, standards for skin care before, during, and after nonenergy and injectable treatments are lacking. The algorithm on supportive skin care for facial antiaging nonenergy and injectable treatments aims to stimulate healing, reduce downtime, and improve comfort and treatment outcomes.  Methods: A panel of 7 global physicians employed a modified Delphi method and reached a consensus on an algorithm for supportive skin care for nonenergy and injectable antiaging treatments based on the best available evidence and the panel members’ clinical experiences and opinions. RESULTS: The algorithm has a pretreatment (starts 2 – 4 weeks before the procedure) and treatment or ongoing (day of treatment) section, followed by care after the procedure (0 – 7 days) and follow-up care (1 – 4 weeks after the procedure). Applying a broad-spectrum sunscreen with an SPF 30 or higher, combined with protective measures, such as wearing a wide-brimmed hat and sunglasses, is recommended to protect the face from sun exposure. Dyschromia is a significant concern for those with richly pigmented skin. Clinicians may recommend skin care using a gentle cleanser and moisturizer containing vitamins C and E, retinoid, or other ingredients, such as niacinamide, kojic acid, licorice root extract, azelaic acid, and tranexamic acid, depending on the patient's facial skin condition. CONCLUSION: Nonenergy and injectable procedures combined with skin care or topical treatments may improve outcomes and patient satisfaction. Topical antioxidants and free radical quenchers can combat photodamage and may offer a safe alternative to topical hydroquinone.    J Drugs Dermatol. 2024;23(4):     doi:10.36849/JDD.7918.


Assuntos
Satisfação do Paciente , Pele , Humanos , Resultado do Tratamento , Antioxidantes , Higiene da Pele , Satisfação Pessoal
6.
J Drugs Dermatol ; 23(3): 152-159, 2024 Mar 01.
Artigo em Inglês | MEDLINE | ID: mdl-38443125

RESUMO

BACKGROUND: Atopic dermatitis (AD) typically starts in infancy and early childhood. The chronic skin disorder is associated with recurrent flares, pruritus, and genetic predisposition. Daily use of moisturizers that contain lipids, such as ceramides, reduces the rate of AD flares and the need for topical steroid treatment. We aimed to provide insights on AD attenuation to tailor AD prescription therapy, skin care, and maintenance treatment to improve pediatric patients with AD and families. METHODS: A panel of 6 pediatric dermatologists and dermatologists who treat neonates, infants, and children developed a consensus paper on AD attenuation for pediatric patients. The modified Delphi process comprised a face-to-face panel meeting and online follow-up to discuss the systematic literature search results and draw from clinical experience and opinion of the panel to adopt and agree on 5 statements.  Results: Understanding the functional properties of newborn and infant skin, discussing skincare product use with parents, and recommending tailored prescription and skincare routines can improve newborn, infant, and children’s skin health. Studies on the prophylactic application of moisturizers initiated in early infancy suggest moisturizers may delay rather than prevent AD, especially in high-risk populations and when used continuously. Increasingly there is evidence that moisturizer application reduces the severity of AD and extends the time to flares, which may help attenuate the atopic march. The protective effect of skin care for AD has been observed in studies where its daily use is ongoing; these beneficial effects may be lost in less than 1year after cessation. It is therefore important to emphasize that skin care should be routinely used when counseling patients and caregivers.  Conclusion: Healthcare providers can improve patient outcomes in atopic-prone infants and children by providing instructions regarding the daily benefits of applying skin care with gentle cleansers and moisturizers. Using gentle cleansers and moisturizers containing barrier lipids from birth onward may delay AD occurrence and mitigate severity in predisposed infants.J Drugs Dermatol. 2024;23(3): doi:10.36849/JDD.7894.


Assuntos
Dermatite Atópica , Recém-Nascido , Lactente , Humanos , Pré-Escolar , Criança , Dermatite Atópica/diagnóstico , Dermatite Atópica/tratamento farmacológico , Consenso , Higiene da Pele , Pele , Ceramidas
7.
PLoS One ; 19(3): e0300376, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38512877

RESUMO

The trends for sustainable lifestyle and marketing motivated natural product consumption, such as natural skin care products (NSCPs). Different personal, environmental, and sociocultural factors influence purchase intention (PI) for NSCPs. However, there is a lack of evidence on the role of consumers' ethnicity in the PI model. The present study investigated the moderated mediation role of ethnicity in the relationship between related factors, including environmental concern, subjective norms, health factor, Halal certificate, packaging design, past experience factor, price factor, and PI mediated by personal attitude. A web-based survey was utilized to capture quantitative data from a random sample of 330 multicultural consumer group participants. The results of the study indicated that consumers' ethnicity substantially moderated the mediation effect of personal attitude in the relationships between subjective norms, health factor, Halal certificate, packaging design, past experience factor, price factor, and PI in the model. The findings contributed to understanding of the factors that influenced the PI of consumers from diverse sociocultural contexts in the market for natural products. It contributed directly to natural product marketing and industry.


Assuntos
Produtos Biológicos , Intenção , Humanos , Etnicidade , Comportamento do Consumidor , Higiene da Pele
8.
Nurs Open ; 11(2): e2103, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-38391104

RESUMO

AIM: To investigate the level of agreement between the SEM 200 and Provisio® subepidermal moisture sacral delta measurements, which may indicate increased pressure injury risk, in healthy adults during 120 min of prolonged 60° head of bed elevation. This position, which requires the elevation of the patient's upper body at a 60° angle above the horizontal plane for an extended period, is used by clinicians to prevent or manage a patient's medical or surgical conditions. DESIGN: This prospective exploratory study recruited 20 healthy adults during October 2021 and collected sacral subepidermal moisture delta measurements using the SEM 200 and Provisio® devices. METHODS: Delta measurements were taken at 20-min intervals over 120 min resulting in seven data collection timepoints. Descriptive statistics and a Bland Altman plot analysis were conducted. RESULTS: A total of 280 sacral subepidermal moisture delta measurements were gathered or 140 per device. There were good levels of agreement between the two devices at baseline (T0) [mean 0.025; SD 0.137] and following 60- (T3) [mean 0.025; SD 0.111], 80- (T4) [mean -0.01; SD 0.177] and 100 min (T5) [mean 0.01; SD 0.129] of prolonged 60° head of bed elevation. Head of bed elevations can increase a patient's risk of sacral pressure injuries. In some countries, nurses have access to the SEM 200 and/or the Provisio® device, so our findings may increase nurses' confidence in the interchangeability of the device measurements, although further research is needed to confirm this. The SEM 200 and Provisio® subepidermal moisture scanners show promise in gathering similar objective pressure injury risk data which could prompt clinicians to implement prevention strategies. IMPACT: Current pressure injury risk assessment is largely subjective in nature. This quantitative study on healthy human sacral tissue found a good level of agreement in the SEM 200 and Provisio® subepidermal moisture scanners, which may increase nurses' confidence in the interchangeability of the devices in clinical practice.


Assuntos
Lesões por Esmagamento , Lesão por Pressão , Adulto , Humanos , Lesão por Pressão/diagnóstico , Lesão por Pressão/prevenção & controle , Estudos Prospectivos , Higiene da Pele , Edema/diagnóstico
9.
Br J Nurs ; 33(4): 176-186, 2024 Feb 22.
Artigo em Inglês | MEDLINE | ID: mdl-38386525

RESUMO

BACKGROUND: Understanding the variances in visual skin changes across all skin tones is important in clinical care. However, the experiences of those teaching skin assessment to pre- and post-registrant nurses are unknown. AIMS: To determine the barriers and facilitators experienced in teaching skin assessment across a range of skin tones to pre- and post-registrant nurses. METHODS: A cross-sectional, mixed-methods online survey was undertaken throughout February and March 2023 based on the Theoretical Domains Framework of behaviour change. FINDINGS: In this self-selecting sample, most participants were aware of why it was important to include all skin tones when teaching skin assessment and were professionally motivated to include this in their practice. However, resources and support are needed to overcome an unconscious bias in teaching skin tone diversity, resulting in a lack of availability of good quality photographs and educator confidence in their own skills. Educators not considering skin tone when selecting patient cases and relying on people with dark skin tones to highlight where practice is not inclusive may also lead to insufficient exposure for students. CONCLUSION: There is some awareness of the importance of including diverse skin tones in teaching, but further education and resources are needed.


Assuntos
Higiene da Pele , Pigmentação da Pele , Humanos , Estudos Transversais , Estudantes , Inquéritos e Questionários
10.
J Drugs Dermatol ; 23(1): 1253-1259, 2024 Jan 01.
Artigo em Inglês | MEDLINE | ID: mdl-38206142

RESUMO

INTRODUCTION: Most people are living into their sixties and beyond. Fundamental changes in chronologically aged skin have significant and widespread dermatological implications. This review discusses aging-associated alterations in epidermal function leading to xerosis and related pruritus and the benefits of maintaining or restoring a healthy skin barrier using skincare, specifically ceramide-containing skincare.   Methods: A panel of 7 dermatologists convened for a meeting to review aspects of xerosis in mature skin, skin barrier changes, and nuances in the treatment and maintenance of mature skin using gentle cleansers and moisturizers. From the selected literature, 13 statements were drafted. During the meeting, the draft statements underwent the panel's evaluation at a workshop, followed by a plenary discussion adopting 5 statements using evidence from the literature coupled with the panel's opinions and experiences. RESULTS: The exact etiology of xerosis is not entirely understood and likely depends on several genetic and environmental mechanisms. Aging-associated changes in epidermal function include a marked reduction in total lipids in the stratum corneum relative to young skin due to reduced epidermal lipid synthesis. In aging skin, xerosis is significantly associated with pruritus. Studies have shown that lipid-containing skin care, such as a gentle ceramide-containing cleanser and moisturizer, promotes a healthy barrier reducing xerosis and pruritus in individuals with mature skin.  Conclusions: The development of xerosis in mature skin involves several genetic and environmental mechanisms. Skincare, including gentle cleansers and moisturizers, has reduced xerosis and pruritus in mature skin individuals.     J Drugs Dermatol. 2024;23(1):1253-1259.     doi:10.36849/JDD.7560.


Assuntos
Prurido , Higiene da Pele , Pele , Idoso , Humanos , Ceramidas , Epiderme , Prurido/etiologia , Prurido/terapia
11.
J Drugs Dermatol ; 23(1): 1337-1343, 2024 Jan 01.
Artigo em Inglês | MEDLINE | ID: mdl-38206152

RESUMO

BACKGROUND: The objective was to provide international recommendations on anti-aging dermocosmetics for clinical practice starting with essential ingredients for protection and repair before working up to advanced products for specific concerns.  Methods: Seven international experts reviewed 8 hypothetical case scenarios covering different ages, skin issues (eg, sensitivity, acne, melasma), and exposure to exposome factors for both sexes and all Fitzpatrick skin types (FST). The RAND/UCLA appropriateness method was used to obtain consensus. Seventeen key ingredients were rated on a scale from 1 (totally inappropriate) to 9 (totally appropriate). Statistical analysis, 2 meetings, and email discussions refined the recommendations. RESULTS: High-factor broad-spectrum sunscreen (ie, protects against ultraviolet [UV] A and B rays), niacinamide, and other topical antioxidants were recommended for all scenarios. Further discussions were required for other ingredients. Tinted sunscreen/iron oxide were recommended for all FST, although compliance may be sub-optimal for darker skin phototypes (IV-VI), if not cosmetically acceptable. Combining a facial foundation with broad-spectrum sunscreen was recommended for darker phototypes to obtain visible light protection closely matching diverse color tones. Retinols were not recommended as a first-line treatment for sensitive skin, especially FST V and VI, due to the risk of irritation. After ablative laser treatment, alpha hydroxy acids should be avoided or used with caution in FST IV to VI due to the risk of post-inflammatory hyperpigmentation. CONCLUSION: We describe a simple, practical tool for use in daily dermatology consultations for providing recommendations on anti-aging dermocosmetics to cover diverse and inclusive populations of patients, addressing all skin types and international needs.  J Drugs Dermatol. 2024;23(1):1337-1343.     doi:10.36849/JDD.7798.


Assuntos
Higiene da Pele , Protetores Solares , Feminino , Masculino , Humanos , Consenso , Pele , Envelhecimento
13.
Am J Trop Med Hyg ; 110(2): 364-369, 2024 02 07.
Artigo em Inglês | MEDLINE | ID: mdl-38169455

RESUMO

Skin diseases are a major public health concern in Indonesia, although access to specialized care in remote areas is limited. We initiated a low-cost teledermatology service in Sumba, a remote island in eastern Indonesia. Eighteen healthcare workers (HCWs) at five primary healthcare centers received training to manage common skin diseases and submit clinical cases beyond their expertise to an online platform. Submitted cases were reviewed by at least one dermatologist. Diagnostic agreement between HCWs and dermatologists was calculated. The HCWs participated in a satisfaction survey 2 years after project initiation. Since October 2020, of 10,384 patients presenting with skin complaints in a 24-month period, 307 (3%) were submitted for a teledermatology consultation. The most frequent skin diseases were infections and infestations (n = 162, 52.8%) and eczematous (85, 27.7%) and inflammatory (17, 5.5%) conditions. Fifty-three patients (17.3%) were diagnosed with a neglected tropical skin disease, including leprosy and scabies. Dermatologist advice was provided within a median of 50 minutes (interquartile range, 18-255 minutes), with 91.9% of consultations occurring within 24 hours. The diagnostic agreement level between HCWs and dermatologists significantly improved over time, from 46.9% in the first 6-month period (κ = 0.45; 95% CI, 0.37-0.54) to 77.2% in the last 6-month period (κ = 0.76; 95% CI, 0.67-0.86; global P < 0.001). The HCWs reported that the teledermatology service was extremely/very useful in supporting daily practice (100%) and improved their knowledge of skin diseases tremendously/a lot (92%). Teledermatology can improve accessibility and quality of skin services in medically underserved areas, providing opportunities for scalability and knowledge transfer to frontline HCWs.


Assuntos
Dermatologia , Dermatopatias , Telemedicina , Humanos , Indonésia/epidemiologia , Dermatopatias/diagnóstico , Dermatopatias/terapia , Higiene da Pele
14.
J Wound Ostomy Continence Nurs ; 51(1): 26-31, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38215295

RESUMO

PURPOSE: The purpose of this quality improvement project was to identify stage 1 pressure injuries (PIs) in patients with darker skin tones using an enhanced skin assessment (Skin Assessment for Dark Skin, SADS) and halogen lighting. PARTICIPANTS AND SETTING: This quality improvement project was conducted on 3 units at a large university teaching hospital in Southeast Michigan. The project was originally designed so that participating patients were identified by bedside nurses as having sufficient melanin to obscure blanching on the hand/forearm using regular lighting, but this goal was not met. Data analysis is based on patients who self-identified as African American or Black, Native Hawaiian or Pacific Islander, Asian, American Indian, and Native Alaskan. Bedside nurses participating in this project were also asked to complete a questionnaire describing their knowledge and experiences with this project and assessment of early-stage PI in patients with darker skin tones. APPROACH: The Iowa Model of Evidence-Based Practice was used to guide this quality improvement initiative. Following a trigger event, we reviewed pertinent literature and developed an enhanced technique for assessing patients with darker skin tones that involved use of halogen lighting (SADS) and documentation of findings. We selected units from our facility and taught nurses to apply the SADS approach. Data from the electronic medical record and a survey of participating nurses were used to compare findings before and after project implementation. Comparisons were based on descriptive data analysis. OUTCOMES: Following implementation of the enhanced physical assessment, the participating units experienced a 6% decrease in the total number of facility-acquired PIs during the implementation period. IMPLICATIONS FOR PRACTICE: The enhanced physical assessment, when paired with halogen lighting, enhanced identification of stage 1 PI in persons with dark skin. The assessment method was easy to teach, learn, and can be performed at the bedside as part of a shift assessment which routinely includes inspection of skin.


Assuntos
Cuidados de Enfermagem , Lesão por Pressão , Humanos , Lesão por Pressão/diagnóstico , Pigmentação da Pele , Iluminação , Higiene da Pele
15.
J Wound Ostomy Continence Nurs ; 51(1): 74-77, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38215301

RESUMO

BACKGROUND: Peristomal abscess (PA) is an uncommon but challenging peristomal skin complication. The initial treatment of the PA usually includes incision and drainage of the abscess, resulting in a peristomal wound. The presence of the wound makes it difficult to maintain a seal between the ostomy skin barrier and the peristomal skin resulting in frequent removal and application of the skin barrier to prevent leakage and allow for daily wound care. CASE: Ms T was a 52-year-old woman with an ileostomy resulting from a prior left hemicolectomy for colon cancer who developed a PA. Treatment of the PA was implemented, along with a modified 2-piece skin barrier that allowed access to the peristomal wound for daily dressing changes while maintaining a seal around the ostomy. CONCLUSION: The modified 2-piece skin barrier technique proved a successful treatment for the management of the PA without frequent changes of the ostomy pouching system.


Assuntos
Estomia , Dermatopatias , Feminino , Humanos , Pessoa de Meia-Idade , Ileostomia/efeitos adversos , Ileostomia/métodos , Abscesso/terapia , Abscesso/complicações , Estomia/efeitos adversos , Dermatopatias/etiologia , Pele , Higiene da Pele
19.
J Cosmet Dermatol ; 23(1): 296-307, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-37522513

RESUMO

BACKGROUND: Tactile sensation plays a crucial role in object manipulation, communication, and even emotional well-being. It has been reported that the deformability of skin (also described as skin compliance) that shows a large mechanical response to stimuli is associated with high tactile sensitivity. However, although the compliance of the stratum corneum, the outermost layer of skin, can change daily due to skin care and environmental factors, few studies have quantified the effect of the stratum corneum on tactile sensation. AIMS: We investigated the changes in tactile sensitivity resulting from skin hydration and identified corresponding alterations in the compliance of the stratum corneum. METHODS: A randomized controlled trial was conducted. Participants were randomly assigned to an intervention group (n = 20) that had a moisturizing cream applied to their cheeks or a control group (n = 19) that had Milli-Q water applied to their cheeks. Tactile discrimination performance was assessed using psychophysical techniques before and after application. The water content, mechanical response characteristics, and penetration of PEG/PPG-17/4 dimethyl ether from the cream in the stratum corneum were evaluated to identify hydration effects. Skin deformations occurring during tactile sensation were measured concurrently using a suction device employed for tactile stimulation. RESULTS: Tactile sensitivity was increased in participants who had cream applied to the skin surface, while no significant change was observed in participants who received Milli-Q water. The improved discrimination of tactile stimulus intensity was directly related to the magnitude of skin displacement. The higher water content of the stratum corneum due to cream application decreased the dynamic modulus of elasticity of the stratum corneum and increased the skin's extensibility in response to tactile stimuli. CONCLUSIONS: Hydrating the stratum corneum significantly enhances tactile sensitivity and is accompanied by an increase in skin extensibility, a factor in tactile intensity perception. The compliance of the thin stratum corneum layer plays a crucial role in tactile experiences that involve skin stretching.


Assuntos
Epiderme , Pele , Humanos , Água/farmacologia , Elasticidade , Higiene da Pele , Ensaios Clínicos Controlados Aleatórios como Assunto
20.
J Cosmet Dermatol ; 23(2): 510-524, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-37658653

RESUMO

BACKGROUND: The development of effective cosmetic products for the reduction of the signs of skin aging is a complex process which requires an optimized combination of ingredients and specialized systems to deliver the actives to the skin layers. AIM: To evaluate the tolerance and antiaging clinical efficacy of a cosmetic formulation containing a blend of nanoencapsulated antioxidants: ascorbyl palmitate, resveratrol, tocopherol, caffeine, carnosine, and niacinamide. METHODS: Clinical efficacy was determined by subjective and instrumental analyses of collagen synthesis by fluorescence spectroscopy, by three-dimensional imaging analysis of suborbital edema, and by analysis of skin hydration and sebum content by biophysical techniques-Corneometer® and Sebumeter®. RESULTS: The studied formulation was safe and effective for the improvement of skin appearance by increasing collagen synthesis and skin moisturizing and by reducing facial blemishes, swelling, and oiliness. A preclinical exploratory approach using an experimental model of human cell and skin cultures agreed with the observed antiaging effects, identifying mechanisms related to the containment of oxidative stress, reduction of melanin production, increased synthesis of type I procollagen, and regulation of the epidermal cohesion protein filaggrin. CONCLUSIONS: The skin benefits obtained resulted from the combination of the ingredients in the formulation and the nanoencapsulation-based delivery system, which favors the solubility, safety, efficacy, and bioavailability of the preparation to the skin.


Assuntos
Cosméticos , Envelhecimento da Pele , Humanos , Antioxidantes/química , Pele , Higiene da Pele , Cosméticos/farmacologia , Cosméticos/química , Colágeno/metabolismo
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