Effect of Vichy water on catalase activity in the stratum corneum

High global antioxidant protection and stimulation of the collagen synthesis of new anti-aging product containing an optimized active mix

OBJECTIVE

To assess the in vitro efficacy on antioxidant potential, protection against global oxidative stress, and effect on collagen neosynthesis of minimalist formula (Peptide-C ampoules product) containing 10% natural vitamin C, rice and lupin bio-peptides, hyaluronic acid, and Vichy volcanic mineralizing water (active mix).

METHODS

In-tube quantitative tests ("in-tube screening") assessed global antioxidant properties, anti-lipid peroxidation, anti-protein glycosylation, and metalloproteinase inhibition (anti-collagenase, anti-elastase, and anti-hyaluronidase activity) properties of the formula. Protection against oxidative stress was evaluated on human keratinocyte monolayer cultures, and collagen neosynthesis was quantified on fibroblast monolayer cultures treated with supernatants from product-treated reconstructed human epidermis.

RESULTS

Product (5% concentration) showed high antioxidant ability (blocking 99.0% oxidation), protection against oxidative stress damage (51.8% lipid peroxidation and 37.8% protein glycosylation decreases), and inhibition of hyaluronidase (21.9%), elastase (47.1%), and collagenase (61.8%). The protective effect was validated on human keratinocyte monolayer cultures in the presence of active mix (0.025%). Oxidative stress (ROS) was reduced by 99.0%, while global oxidative stress (RMS) induced by pollution, UVA radiation, and a combination of both factors was reduced by 48.94%, 8.7%, and 96.28%, respectively. The product increased collagen neosynthesis (11.21%) by cellular dialogue in fibroblasts incubated with product/mix-treated-RHE supernatants.

CONCLUSION

The combination of ingredients in the product showed high global antioxidant capacity, as well as a protective effect against oxidative stress induced by UVA, pollution, or both combined factors and an ability to stimulate collagen neosynthesis in in vitro studies, which support the clinical efficacy of this product.

Anti-inflammatory effects of free and liposome-encapsulated Algerian thermal waters in RAW 264.7 macrophages

The main objectives of this work were to formulate liposomes encapsulating highly mineralized thermal waters (TWs) and to study anti-inflammatory effect of free and encapsulated thermal waters on RAW 264.7 macrophage cells stimulated with lipopolysaccharide (LPS). TWs-loaded conventional and deformable liposomes (TWs-Lip and TWs-DLip) were prepared by sonication and extrusion, respectively. They were considered for their vesicle size, zeta potential, entrapment efficiency, physical stability and in vitro anti-inflammatory effect. Formulated liposome suspensions have a low polydispersity and nanometric size range with zeta potential values close to zero. The vesicle size was stable for 30 days. Entrapment efficiency of TWs was above 90% in conventional liposomes and 70% in deformable liposomes. Pretreatment of LPS-stimulated murine macrophages, with free and liposome-encapsulated TWs, resulted in a significant reduction in nitric oxide (NO) production and modulated tumor necrosis factor-α (TNF-α) production suggesting an anti-inflammatory effect which was even more striking with TWs-Lip and TWs-DLip. Liposome formulations may offer a suitable approach for transdermal delivery of TWs, indicated in inflammatory skin diseases.

Vichy volcanic mineralizing water has unique properties to strengthen the skin barrier and skin defenses against exposome aggressions

Exposome aggressions are known to weaken certain skin functions, such as skin barrier and skin defense functions. Vichy volcanic mineralizing water (VVMW) percolates through volcanic and magmatic rocks in the Auvergne region in France to create a pure, highly mineralized water containing 15 minerals for a total mineral concentration of 5.2 g/L. Here, we provide an overview of the main results of in vitro and ex vivo studies (keratinocyte cultures, 3D reconstructed skin model, skin explants) and clinical studies to evaluate the effect of VVMW on key skin functions to help elucidate how it counteracts exposome aggressions on the skin. Properties to strengthen the skin barrier: VVMW stimulated the synthesis of tight junction proteins and keratinocyte differentiation markers in vitro. In clinical studies, VVMW accelerated cell turnover and improved skin hydration. Properties to strengthen skin antioxidant defense: VVMW stimulated the expression of antioxidant defense markers and had a higher stimulatory effect than a competitor thermal water on the expression of superoxide dismutase, catalase, and glutathione peroxidase in keratinocytes in vitro. In vivo, VVMW restored endogenous catalase activity after exposure to UVA radiation. Anti-inflammatory action: VVMW reduced substance P-induced inflammation ex vivo and lactic acid-induced stinging in vivo. Topical application of VVMW in subjects with sensitive skin showed soothing and decongestant effects by reducing skin dryness and erythema. After sodium lauryl sulfate -induced skin barrier disruption, recovery from redness and erythema was faster following application of VVMW compared to a competitor water or untreated skin. These studies illustrate that VVMW has unique properties to repair and regenerate the skin barrier, as well as to strengthen antioxidant and immune defenses, which help protect the skin against exposome aggressions.

89% Vichy mineralizing water with hyaluronic acid is a well-tolerated adjunct treatment that helps restore skin barrier function in dry skin-related inflammatory dermatoses and post-procedure skin care: A Canadian study

INTRODUCTION

Minéral 89 (M89), comprised of 89% Vichy mineralizing water and hyaluronic acid, has been formulated to help strengthen and restore skin barrier.

AIM

Assess tolerance and efficacy of M89 in post-esthetic procedures and dry skin-related facial dermatoses.

METHOD

Adults post-esthetic procedure or presenting with inflammatory dermatoses (47 subjects; mean age 40.9 ± 13.2 years; any Fitzpatrick or skin phototype), applied M89 for 4 weeks, once or twice daily, as an adjuvant treatment. Information on clinical signs and subject-reported symptoms, skin characteristics, tolerance, and subject and investigator satisfaction were collected.

RESULTS

Following 4 weeks of M89 use, significant decreases with complete resolution of erythema (27.6%), desquamation (29.8%), irritation (32%), and skin dehydration (35.8%), as compared to baseline signs and symptoms, were observed. Overall grading improvements for erythema (84.8%; p < 0.001), desquamation (91.7%; %; p < 0.003), irritation (91.7%; %; p < 0.015), and skin hydration (46.2%; p < 0.015) were noted. There was no significant improvement in papules and pustules. Evaluation of subjective signs demonstrated significant decreases in skin sensations such as burning (-73%; p < 0.0001), itching (-71%; p < 0.0001), stinging-tingling (-66.7%; p < 0.0001), as well as in skin dryness (-60%; p < 0.0001). M89 texture was rated very pleasant by 90% of patients. Investigators assessed M89 tolerance to be either good or very good (93%), and satisfactory or highly satisfactory impact on patient's skin (91.5%).

CONCLUSION

M89 is a highly tolerable adjuvant treatment that significantly improved clinical signs and symptoms related to a compromised skin barrier in various facial dermatoses and post-aesthetic procedures.

Vichy mineralizing water with hyaluronic acid is effective and well tolerated as an adjunct to the management of various dermatoses and after esthetic procedures

INTRODUCTION

M89, containing 89% of Vichy mineralizing water and hyaluronic acid, has been developed to reinforce the skin barrier and to improve skin quality.

AIM

To assess efficacy and tolerability of M89.

METHOD

Observational survey of subjects with facial dermatoses or after esthetic procedures. M89 served as adjunct to conventional therapy. Clinician assessments of erythema, desquamation, irritation and patient-reported dryness, burning, itching, and stinging/tingling were conducted at baseline and 4 weeks. At 1 week and 4 weeks, patient assessed tolerance and satisfaction with M89.

RESULTS

A total of 1630 subjects participated; 92.5% were females. Mean age was 41.1 ± 11.3 years. Dermatological indications accounted for 32.5%, procedures for 67.5%. At 4 weeks, in subjects with dermatoses, erythema had resolved or improved in 68.0%, desquamation in 83.4%, and irritation in 93.3%. Dryness, burning, itching, and stinging/tingling scores had decreased by 63.8%, 81.8%, 70.9%, and 85.2%, respectively (all P ≤ .0001); 75.7% considered that their skin was sufficiently hydrated. In the procedure group, erythema had resolved or improved in 72.5%, desquamation in 75.2%, and irritation in 88.1%. Dryness, burning, itching, and stinging/tingling scores had decreased by 62.1%, 78.8%, 70.0%, and 84.2%, respectively (all P ≤ .0001); 74.1% considered that their skin was sufficiently hydrated. Almost all subjects reported soothed skin and satisfaction with product texture. Subject and investigator satisfaction was very high.

CONCLUSION

M89 significantly improves skin signs and symptoms after 4 weeks of continued use with no tolerance issues in subjects with dermatological indications. Moreover, subjects who have had recently undergone esthetic procedures M89 allowed a satisfying skin recovery.