Photoprotection for people with skin of colour: needs and strategies.

Skin of colour or pigmented skin has unique characteristics: it has a higher eumelanin-to-pheomelanin ratio, more mature melanosomes, an increased amount of melanin distributed in the upper layers of the epidermis, and more efficient DNA repair compared with lighter skin. However, individuals with skin of colour are at a significant risk of skin damage caused by ultraviolet radiation, including the development of photodermatoses and photoageing changes such as uneven skin tone, and are predisposed to pigmentary disorders. In fact, one of the most common conditions leading to dermatology consultations by patients with skin of colour is photoexacerbated pigmentary disorders. Unfortunately, individuals with skin of colour may be less prone to engage in photoprotective measures, including the use of sunscreens. Physicians are also less likely to prescribe sunscreens for them. There is thus a clear need for better education on photodamage and for more efficient and suitable photoprotection in populations with skin of colour. However, this need has thus far only partially been met, and the development of sunscreen products designed to provide optimal photoprotection for people with skin of colour remains a challenge. Targeted sunscreens for individuals with skin of colour require optimal cosmetic appeal (leaving no white residue and not disrupting skin tone). They should include broad-spectrum [ultraviolet (UV)B/UVA] protection with high sun protection factor, as well as protection against long-wave UVA (UVA1) and visible light, as these wavelengths are capable of inducing or augmenting pigmentary disorders. They may also contain depigmenting agents for patients with pigmentary disorders.

Photoprotection of the Skin from Visible Light‒Induced Pigmentation: Current Testing Methods and Proposed Harmonization.

Visible light (VL) can induce pigmentary alterations, especially in dark-skinned individuals, and exacerbate photodermatoses and pigmentary disorders. Currently, there is no standardized method for assessing sunscreen protection against VL. On the basis of a critical review of published in vitro and in vivo methods, a VL photoprotection assessment method based on pigmentation is proposed.

Anti-Melanogenesis Effects of Lotus Seedpod In Vitro and In Vivo.

Melanogenesis has many important physiological functions. However, abnormal melanin production causes various pigmentation disorders. Melanin synthesis is stimulated by α-melanocyte stimulating hormone (α-MSH) and ultraviolet (UV) irradiation. Lotus seedpod extract (LSE) has been reported as possessing antioxidative, anti-aging, and anticancer activities. The present study examined the effect of LSE on melanogenesis and the involved signaling pathways in vitro and in vivo. Results showed that non-cytotoxic doses of LSE and its main component epigallocatechin (EGC) reduced both tyrosinase activity and melanin production in the α-MSH-induced melanoma cells. Western blotting data revealed that LSE and EGC inhibited expressions of tyrosinase and tyrosinase-related protein 1 (TRP-1). Phosphorylation of p38 and protein kinase A (PKA) stimulated by α-MSH was efficiently blocked by LSE treatment. Furthermore, LSE suppressed the nuclear level of cAMP-response element binding protein (CREB) and disturbed the activation of melanocyte inducing transcription factor (MITF) in the α-MSH-stimulated B16F0 cells. The in vivo study revealed that LSE inhibited melanin production in the ear skin of C57BL/6 mice after exposure to UVB. These findings suggested that the anti-melanogenesis of LSE involved both PKA and p38 signaling pathways. LSE is a potent novo natural depigmenting agent for cosmetics or pharmaceutical applications.

Uso de productos barrera para prevenir complicaciones en la piel periestomal / Use of barrier products in order to prevent complications in the peristomal skin

OBJETIVO: evaluar la eficacia del uso de un aerosol protector barrera para la prevención de la maceración e irritación de la piel periestomal, en el paciente quirúrgico, antes de la colocación de los discos, y valorar la eficacia de la aplicación de dicho aerosol previo a la retirada de los adhesivos. MÉTODO: se llevó a cabo un ensayo clínico aleatorizado con dos grupos de comparación: grupo control (cura habitual) y grupo experimental (cura habitual + aplicación de aerosol como método barrera antes de la colocación del disco y spray quita-adhesivo para su retirada). Se incluyeron a los pacientes ostomizados en el Hospital Universitario Infanta Cristina (Parla, Madrid) en 2019, atendidos en la Consulta de Cirugía General. Se aleatorizaron a dos grupos, 15 por grupo. Se recogieron variables descriptivas el día de la captación y de resultado a los 10 días del seguimiento. Se llevaron a cabo análisis univariante y bivariante. La relación entre las distintas variables se evaluó mediante pruebas estadísticas. RESULTADOS: se aleatorizaron 30 pacientes, 15 en grupo control y 15 en grupo experimental. Se observaron diferencias clínicas en los grupos de comparación al inicio del estudio. Al comparar las variables de resultado a los 10 días de la cirugía en los dos grupos del estudio, se observaron diferencias estadísticamente significativas en la presencia de complicaciones en la piel periestomal (p< 0,001) con un 80% (n= 12) en el grupo control frente al 6,7% (n= 1) en el grupo experimental, y en el tipo de complicaciones entre ambos grupos (0,002), destacando las lesiones de tipo L2 Erosivas. CONCLUSIONES: la utilización tanto de un aerosol protector barrera sobre la piel del paciente antes de la colocación del disco de ostomías como la aplicación para su retirada de un spray quita-adhesivo, parece reducir el riesgo de complicaciones en la piel periestomal en el paciente quirúrgico

OBJECTIVES: to assess the efficacy of using a protective barrier spray for preventing peristomal skin maceration and irritation in surgical patients before disc placement, and to assess the efficacy of the application of said spray before removing the adhesive discs. METHOD: a randomized clinical trial was conducted with two comparison arms: the control group (standard cure) and the experimental arm (standard cure + application of spray as barrier method before disc placement and adhesive remover spray for removing them). The study included ostomized patients from the Hospital Universitario Infanta Cristina (Parla, Madrid) in 2019, seen at the General Surgery Unit. Patients were randomly assigned to two 15-patient arms. Descriptive variables were collected on recruitment day, and for outcomes at 10 days follow-up. Univariate and bivariate analyses were conducted. The relationship between different variables was evaluated through statistical tests. RESULTS: thirty (30) patients were randomized, 15 patients to the control arm and 15 patients to the experimental arm. Clinical differences were observed in the comparison arms at study initiation. When comparing the outcome variables at 10 days after surgery in the two study arms, statistically significant differences were observed regarding the presence of complications in the peristomal skin (p< 0.001) with 80% (n= 12) in the control arm vs. 6.7% (n= 1) in the experimental arm, and in terms of type of complications between both arms (0,002), particularly L2-type erosive lesions. CONCLUSIONS: the use of a protective barrier spray on the skin of the patient before placing the ostomy disc as well as the application of an adhesive remover spray for removal seems to reduce the risk of complications in the peristomal skin of surgical patients

Dermatologic Laser Side Effects and Complications: Prevention and Management.

The evolution of modern laser and light-based systems has mirrored the demand for clinically effective treatments and the need for safer technologies with reduced postoperative recovery, side effects, and complications. With each new generation of lasers, more selective tissue destruction can be achieved with reduced unwanted sequelae. Patient selection and preparation, operator technique, and expeditious recognition and management of post-treatment side effects are paramount in avoiding complications and patient dissatisfaction. An overview of important variables to consider for dermatologic laser treatments are presented in order to provide a framework to reduce the severity and duration of possible post-treatment side effects and complications.

Cutaneous sequelae in neonatal lupus: A retrospective cohort study.

BACKGROUND: Cutaneous eruptions in neonatal lupus erythematosus (NLE) are thought to be self-resolving. Limited literature suggests cutaneous changes may persist. OBJECTIVE: To characterize cutaneous residua in NLE and identify predictors for their development. METHODS: A retrospective cohort study of patients with cutaneous NLE born between January 1980 and May 2017 was performed. Primary outcome was the proportion of patients with cutaneous residua. Secondary outcomes included associations/predictors of sequelae. RESULTS: At the last follow-up, at a mean age of 4 years (range, 0.5-18.7 years), 34% of 106 patients had cutaneous sequelae, 13% had telangiectasia, 17% had dyspigmentation, and 9% had atrophic scarring. Scarring at the last follow-up was significantly associated with the presence of skin lesions at birth (P < .001). LIMITATIONS: This study was limited by the retrospective design, short follow-up duration in a subset of patients, and small sample size. CONCLUSION: Cutaneous NLE can exhibit long-term cutaneous residua. These findings underlie the importance of accurate diagnosis, long-term monitoring, and appropriate counseling.

Prophylactic management for taxane-induced nail toxicity: A systematic review and meta-analysis.

OBJECTIVE: This meta-analysis was performed to assess the efficacy of cryotherapy and nail solution (NS) use in preventing nail toxicity (NT) induced by taxane-based chemotherapy. METHODS: PubMed, EMBASE, Cochrane Library and ClinicalTrials.gov registry databases were searched for relevant studies published up to December 2018. The primary outcome was taxane-induced NT. Secondary outcomes were skin toxicity (ST), time to toxicity and patient comfort. RESULTS: We reviewed three randomised control trials and six prospective studies with 708 patients. For meta-analysis, taxane-induced NT grading was compared. NT and ST were significantly lower in the cryotherapy patients than in the controls (grade 1 NT: risk ratio [RR] = 0.51, 95% confidence interval [CI] = 0.30-0.89; grade 2-3 NT: RR = 0.36, 95% CI = 0.11-1.12; total NT: RR = 0.49; 95% CI = 0.30-0.79; ST: RR = 0.46, 95% CI = 0.33-0.64). The NS-treated patients exhibited significantly lower NT than the controls. CONCLUSIONS: Nail solution-treated or cryotherapy patients exhibited lower NT incidence and severity associated with taxane-based chemotherapy than the controls. For patients who can afford and comply with NS use or cryotherapy, these measures represent effective prophylactic management for taxane-induced NT and improve their quality of life and functional statuses. Further studies are needed to establish the routine usage protocols, long-term efficacy and safety for these interventions.

Photoaging and Photoprotection in United States Hispanic Population

Photoaging is a complex and chronic process that induces structural and functional changes in sun-exposed skin, including coarse wrinkles, laxity, dyschromia, telangiectasias, and potential precancerous lesions. Pigmented skin presents different structure and physiology that contribute to distinctive photoaging process. The skin of color population is reported to "age better" than their Caucasian counterparts in general, with fewer wrinkles and better skin texture. However, pigmentary disorders and sun-exposure related dyschromia are highly prevalent in skin of color. Hispanics are the fastest growing population in the U.S. and represents a heterogenous group of people with different skin tones and Fitzpatrick phototypes. They demonstrate large diversity and heterogeneity in skin physiology, pigmentary disorders, and photoaging-related skin color shifting. Specific concerns around hyperpigmentation, skin tone evenness, and texture or roughness are very common among Hispanics, demanding targeted medical and cosmeceutical solutions. Customized daily routines including sufficient photo-protection are essential to address such needs. This mini review identifies some of the specific skin concerns of Hispanics in America and emphasizes the needs for long-term sunscreen use and education. J Drugs Dermatol. 2019;18(3 Suppl):s121-123.

ReCell® Spray-On Skin System for Treating Skin Loss, Scarring and Depigmentation after Burn Injury: A NICE Medical Technology Guidance.

The gold standard treatment for deep burns is an autologous skin graft; in larger burns this may be meshed to increase the area covered. However, long-term aesthetic and functional outcomes of graft scars may be poor. ReCell® is a medical device that processes skin samples in the operating theatre into a cell suspension to be sprayed or dripped onto a wound. It is claimed to improve healing and scar appearance. This device was evaluated by the National Institute for Health and Care Excellence (NICE) Medical Technologies Evaluation Programme. Two groups were defined: ReCell compared to conventional dressings in shallower burns, and meshed grafts plus ReCell compared to meshed grafts alone in larger deeper burns. The manufacturer's clinical evidence submission included three papers and eight conference abstracts. The External Assessment Centre (EAC) excluded two of these and added seven abstracts. In general, the evidence did not fit the defined groups, but suggested that ReCell was clinically comparable to skin grafts for partial thickness burns; however, ReCell is not used in this way in the UK. The manufacturer submitted an economic model in which ReCell treatment of partial thickness burns reduced the requirement for later skin grafts. This indicated that ReCell alone was cost saving in comparison to conventional dressings. The EAC indicated that this model was clinically inappropriate, but data were not available to populate a new model. NICE Medical Technologies Guidance 21 recommended that additional research was needed to address the uncertainties regarding the potential benefits of ReCell.

Multifunctional photoprotection: corrective makeup for cutaneous dyschromias

The aim of this study was to develop and evaluate a corrective and photoprotective makeup for patients with dyschromias. An emulsion was prepared and pigment mixtures were incorporated in the formulation, producing five shades of corrective makeup: BEIGE (I, II, III), BRONZE and TAN. The sun protection factor (SPF) and UVA/UVB ratio of the corrective makeup were determined using spectrophotometry with a Labsphere® analyser. The spreadability, occlusivity, stability, and photostability of the photoprotective formulations were also evaluated. For all formulations there was no statistical difference among them (p > 0.05) in terms of spreadability, occlusivity and SPF. They were considered to be photostable under solar radiation, with variations in SPF value and UVA/UVB ratio lower than 20%. The corrective makeup presented average-to-high UVB photoprotection and broad spectrum photoprotection. After 90 days, pH, density and SPF values showed no significant differences among formulations (p>0.05). All corrective makeup presented separation of the pigments, however, they returned to a homogeneous aspect and to the original color shade after shaking. The corrective makeup presented a fine texture, little brightness, and a homogeneous, dry-to-the-touch aspect. This work may benefit patients with dyschromias, improving their quality of life, besides promoting photoprotection and covering the skin blemishes

Effective prevention of posttraumatic tattoo using hydrosurgical debridement in the ED.

Traumatic tattoos can result from the accidental deposition of foreign particles in the dermis. These pigmented particles can become permanently lodged in the dermis after wound re-epithelialization and lead to irregular black or blue skin discoloration. Different methods exist for tattoo removal. The best strategy is to prevent traumatic tattoo formation by immediately removing the foreign particles before the healing process begins. Here, we present a fine-tuned, hydrosurgical debridement system to selectively debride wounds and preserve as much viable tissue as possible.

In vivo time-sequential histological study focused on melanocytes: suggestion of golden time for intervention to prevent post-laser pigmentary changes.

BACKGROUND: Post-inflammatory pigmentary changes after laser treatments are challenging adverse effect. OBJECTIVE: To suggest an ideal time period with regard to intervention to prevent post-laser pigmentary changes, an in vivo time-sequential histological study focused on melanocytes was performed. METHODS: The back skin of four volunteers was irradiated with Q-switched alexandrite laser (QSAL). In one subject (subject 4), topical corticosteroid was applied onto the irradiated skin from the time of irradiation to day 28. In all subjects, time-sequential skin biopsies were performed at baseline, an immediate time after irradiation, day 2, day 7, and day 28. Histological and immunohistochemical analyses were conducted. RESULTS: Q-switched alexandrite laser led to the successful removal of pigments and most melanocytes from the epidermis in all subjects. At day 28, there was increased epidermal pigmentation in the skin of the subjects 1-3. It was noted that numerous activated melanocytes appeared on day 7, continued to be observed until day 28. However, in the subject 4, the melanocyte activation and post-laser pigmentary changes were not observed. CONCLUSION: In regard to intervene melanocyte activation, at least 1 week after laser treatment is suggested as a 'golden' time period to prevent pigmentary changes.

Physical and psychiatric recovery from burns.

Burn injuries pose complex biopsychosocial challenges to recovery and improved comprehensive care. The physical and emotional sequelae of burns differ, depending on burn severity, individual resilience, and stage of development when they occur. Most burn survivors are resilient and recover, whereas some are more vulnerable and have complicated outcomes. Physical rehabilitation is affected by orthopedic, neurologic, and metabolic complications and disabilities. Psychiatric recovery is affected by pain, mental disorders, substance abuse, and burn stigmatization. Individual resilience, social supports, and educational or occupational achievements affect outcomes.

[Pigmentary lesions in patients with increased DNA damage due to defective DNA repair]. / Lésions pigmentaires et maladies de la réparation de l'ADN.

The occurrence of abnormally pigmented skin lesions is a common phenomenon and often associated with the influence of ultraviolet radiation (UV) and other sources of DNA damage. Pigmentary lesions induced by UV radiation and other sources of DNA damage occur in healthy individuals, but human diseases with defective DNA repair represent important models which allow the investigation of possible underlying molecular mechanisms leading to hypo- and hyperpigmentations. There are several hereditary diseases which are known to go along with genetic defects of DNA repair mechanisms comprising Xeroderma pigmentosum (XP), Cockayne syndrome (CS), Trichothiodystrophy (TTD), Werner syndrome (WS), Bloom syndrome (BS), Fanconi anemia (FA) and Ataxia telangiectasia (AT). These diseases share clinical characteristics including poikilodermatic skin changes such as hypo-and hyperpigmentation. Since UV radiation is the most common source of DNA damage which can cause pigmentary lesions both in healthy individuals and in patients with genetic deficiency in DNA repair, in the present article, we focus on pigmentary lesions in patients with XP as an example of a disease associated with genetic defects in DNA repair.

Considerations on photoprotection and skin disorders.

Excessive exposure to solar or artificial sources of UV radiation is deleterious to the skin and can cause or worsen several diseases. Detrimental effects of UV radiation exert an important role in the development of skin cancers, cause alterations on the immune response, and act as a trigger or aggravating factor for pigmentary disorders. A group of measures, including education, change of habits, use of physical barriers and sunscreens constitutes a significant part of the treatment of many skin disorders and are valuable preventive tools. This article summarizes the relevant studies addressing these issues, emphasizing the many aspects of photoprotection.