Patent Application
20130209380
The present invention relates to compositions for topical application, and to the uses thereof as cosmetic or pharmaceutical products, said compositions being for use in the treatment of dermatological disorders, and in particular in the treatment of acne.
Acne is a common multi-factor pathology that attacks skin rich in sebaceous glands (face, shoulder area, arms and intertriginal areas). It is the most commonly occurring form of dermatosis. The following five pathogenic factors play a determining role in the formation of acne:
1. genetic predisposition;
2. overproduction of sebum (seborrhoea);
3. androgens;
4. follicular keratinization disorders (comedogenesis); and
5. bacterial colonization and inflammatory factors.
There are several forms of acne, the common factor of all being attack of the pilosebaceous follicles. Mention may be made in particular of acne conglobata, cheloid acne of the nape of the neck, acne medicamentosa, recurrent miliary acne, necrotic acne, neonatal acne, premenstrual acne, occupational acne, acne rosacea, senile acne, solar acne and common acne.
Common acne, also known as polymorphic juvenile acne, is the most common. It comprises four stages:
The various forms of acne described above can be treated with active agents such as anti-seborrheic agents and anti-infectives, for example benzoyl peroxide (in particular the product Eclaran® sold by the company Pierre Fabre), with retinoids such as tretinoin (in particular the product Retacnyl® sold by the company Galderma) or isotretinoin (the product Roaccutane® sold by Laboratoires Roche), or else with naphthoic acid derivatives. Naphthoic acid derivatives such as, in particular, 6-[3-(1-adamantyl)-4-methoxyphenyl]-2-naphthoic acid, which is commonly called adapalene (the product Differine® sold by the company Galderma), are widely described and recognized as active ingredients that are just as effective as tretinoin for the treatment of acne.
Some Adverse Events appear with Rx products (mainly retinoids topical/oral) which produce important related AE and frequent cutaneous side effects such as Ziana: 27% subjects with related application site AE and the most important is dry skin. This shows the importance of adjunctive therapy to improve side effects of acne drugs.
Skin Care regimen recommended by dermatologists for acne treatment encompasses the following steps:
Step 1: Wash
Step 2: Medicate (Rx treatment)
Step 3: Hydrate & Protect
It is useful to have Skin Care Products which improve Acne Signs/Symptoms (Reduce oiliness of skin; reduce/not increase comedons; reduce/not increase inflammatory lesions) and/or side effects of Acne such as decrease adverse events secondary to acne treatments (reduce Dry skin; decrease erythema; reduce stinging/burning)
In one embodiment, the present invention provides a topical dermatological/pharmaceutical composition and particularly provides a moisturizing composition.
In particular, there is a need for and particularly a facial Moisturizer for dry/irritated skin preferably with a sunscreen and preferably with SPF 30.
The present invention provides a composition having the properties and advantages of protecting the skin from the sun (UVA and UVB), of long lasting moisturizing the skin, of reducing oily skin, of reducing redness and inflammation and is highly tolerated.
The present invention provides an advantageously a single composition which moisturizes the skin and protect it at the same time. Thus, it is more convenient for a subject in need of such a composition and advantageously provide a great compliance.
One embodiment of the present invention is a moisturizing composition comprising at least one moisturizer ingredient, zinc gluconate and at least one UVA/UVB sunscreen.
In a preferred embodiment, the moisturizer ingredient is selected from: glycerol, D-panthenol, Alpha tocopheryl acetate, ceramides 5 alone or in combination.
Thus in one particular embodiment, the invention provides a composition comprising:
In a preferred embodiment of invention, the sunscreen is selected from Ethyl hexyl salicylate; Ethyl hexyl cyanodiphenylacrylate; Octocrylene alone or in combination.
The composition is for topical application. Preferably, the composition is in the form of aqueous, aqueous-alcoholic or oily dispersions, dispersions of the lotion type, aqueous, anhydrous or lipophilic gels, emulsions of liquid or semi-liquid consistency of the milk type, obtained by dispersion of a fatty phase in an aqueous phase (O/W) or vice versa (W/O), or suspensions or emulsions of soft, semi-liquid or solid consistency of the cream, gel, cream-gel, foam or ointment type, or microemulsions, microcapsules, microparticles or vesicular dispersions of ionic and/or nonionic type, in the form of sprays, or else in the form of dermal devices such as patches.
A second subject of the present invention is the use a composition according to the invention, for use in the treatment and/or prevention of dermatological conditions linked to acne treatment and particularly common acne, comedonic acne, papulopustular acne, papulocomedonic acne, nodulocystic acne, acne conglobata, cheloid acne of the nape of the neck, recurrent miliary acne, necrotic acne, neonatal acne, occupational acne, acne rosacea, senile acne, solar acne and acne medicamentosa. Preferably, the preparation of a pharmaceutical composition is intended for use in preventing, inhibiting or treating common acne.
The invention also provides a method for improving and/or preventing and/or inhibiting dermatological conditions linked to acne treatment. The invention provide also a treatment process for embellishing the skin or its surface appearance, in which a composition comprising, in a physiologically acceptable medium, a retinoid, an anti-irritant and benzoyl peroxide is applied to the skin and/or its integument annexes. In a preferred embodiment, the treatment of skin is for skin with an acneic tendency or for combating the greasy appearance of the skin or the hair.
Throughout the present text, unless otherwise specified, it is understood that, when concentration ranges are given, they include the upper and lower limits of said range. Similarly, unless otherwise indicated, the proportions of the various constituents of the composition are expressed as percentage by weight (m/m) of the total weight of said composition
The composition of the invention comprise Zinc gluconate (also called zincum gluconium) is the zinc salt of gluconic acid. It is an ionic compound consisting of two moles of gluconate for each mole of zinc. Zinc gluconate is a popular form for the delivery of zinc as a dietary supplement.
The composition of the invention comprises at least one UVA/UVB sunscreen or sunblock. For this purpose, any known UVA/UVB sunscreen can be use. These latter are well known by the skilled artisan but we can cite among of them the chemical and mechanical UVA/UVB suncreens. As illustrating examples one can cite Ingredients like Mexoryl SX, Mexoryl XL, titanium dioxide, Parsol 1789 and titanium dioxide, considered alone or combined together such as those disclosed in WO91/11989.
Advantageously UVA/UVB sunscreens give to the subject in need a short term protection from sunburns, but also provide long term damage from wrinkles, sagging skin and premature aging.
The present invention comprises ceramides and preferably ceramides 5. Ceramides are sphingolipids that consists of a long-chain of amino alcohol to which a hydroxylated or non hydroxylated long chain fatty acid is linked via an amide bond.
Ceramides, the main stratum corneum (SC) polar lipids, play an important role in skin barrier function: Regulation of skin water barrier homeostasis; and/or Water-holding capacity.
In a preferred embodiment of invention, the composition comprise pseudo ceramide 5, known as N-(2-hydroxy hexadecanoyl)sphinganine, which is synthetic ceramide developed by L'Oreal and disclosed in U.S. Pat. No. 5,665,778. For this synthetic ceramide it has been demonstrated on In vitro human skin model, a good affinity and diffusion into the stratum corneum and induction synthesis of ceramides 1-2-3.
The composition may also comprise 18β-Glycyrrhetinic acid which is the active component in licorice root. Recent study has shown that 18β-Glycyrrhetinic acid exhibits many pharmacological activities.
The composition of the invention further comprises a preservative. As preservative, it can be mentioned among the preservatives, mention may be made, by way of non-limiting examples, of benzoic acid and its derivatives such as benzyl alcohol, also benzalkonium chloride, sodium benzoate, bronopol, chlorhexidine, chlorocresol and its derivatives, ethyl alcohol, phenethyl alcohol, phenoxyethanol, potassium sorbate, diazolidinylurea, taken alone or as mixtures.
By way of preferred preservative, mention may be made of phenoxyethanol, potassium sorbate or benzalkonium chloride, taken alone or as a mixture.
Another embodiment of invention relates to the use of a moisturizing composition as describe herein for protecting the skin from the sun (UVA and UVB), for long lasting moisturizing the skin, for reducing oily skin, for reducing redness and inflammation.
Invention also provides a non-therapeutic cosmetic treatment process for embellishing the skin or its surface appearance, in which a moisturizing composition as described above is applied to the skin and/or its integument annexes.
The present invention will now be illustrated by means of the following examples, which cannot limit the scope of the present invention.
Ethyl hexyl salicylate (UVB): 5%
Ethyl hexyl cyanodiphenylacrylate (UVB): 7%
Octocrylene (UVA): 3%
Zinc gluconate (0.2%)
silica (2%)+corn starch (2%)
PMMA spherica (2%)
glycerol (5%)
D-panthenol (0.2%)
Alpha tocopheryl acetate (0.5%)
ceramides 5
allantoin
beta-glycyrrhetinic acid (enoxolone)
This was a single center study evaluating the tolerance (Dermatological) and acnegenicity potential of a face moisturizer following six (6) consecutive weeks of test article use by a panel of approximately fifty (50) healthy, adult male and female acne-prone volunteers.
Prior to test article distribution, subjects were queried as to any subjective irritation (itching, burning and stinging) they may have been experiencing at that moment. Subjects were then evaluated by a Dermatologist who performed baseline dermatological evaluations of the face for the presence of erythema, dryness and oedema. Additionally, the following procedures were performed by Dermatologist:
Grading of the face for the presence of the following Acne Lesions:
Assessment of the Global Severity of Acne
Following the evaluations of acne lesions, subjects were provided with the test article and instructed to use the test article at least twice daily for the next six consecutive weeks and to record the times of test article application, as well as any comments and/or sensations observed, on the daily diary form provided to them. Additionally, subjects were instructed to call the testing facility as necessary and/or after twenty one (21) days of test article use to report any problems that might have occurred. This information was recorded on the subjects' call-in data sheets.
Following six (6) consecutive weeks of test article use the subjects returned to the testing facility and underwent the same dermatological evaluations (assessment of erythema, dryness and edema) as performed at the baseline visit. The dermatologist also performed visual evaluations for determining the total number of acne lesions, and global severity of acne, on the subjects' faces. Subjects were queried as to any subjective irritation (burning, itching or stinging) they may have experienced during the course of the study. Additionally, each subject filled out a questionnaire. As an indication of compliance, diaries and test articles were collected at the 6 week visit and the test articles weighed.
Diaries were reviewed and an adverse event form was completed for those subjects who reported safety related problems. Following Week 6 activities, subjects were dismissed from the study.
Study Procedures
Screening and Consenting Process
Prior to arrival at the testing facility each subject was screened to ensure he/she met all of the inclusion and none of the exclusion requirements. Following the screening process, subjects arrived at the testing facility and underwent the informed consent process and completed a brief medical history form.
Treatment
Baseline Visit (Day 1)
Subjective Irritation Assessment Subjects meeting all of the inclusion and none of the exclusion criteria were queried by the testing facility staff for any subjective irritation they might have been experiencing. The subjects were asked to assess the degree of the following sensations on their face that they were experiencing at their baseline visit using the scales below:
Itching
0—None No itching
1—Mild Slight itching, not really bothersome
2—Moderate Definite itching that is somewhat bothersome
3—Severe Intense itching that may interrupt daily activities and/or sleep
Burning
0—None No burning
1—Mild Slight burning sensation; not really bothersome
2—Moderate Definite warm, burning sensation that is somewhat bothersome
3—Severe Hot burning sensation that causes definite discomfort and may interrupt daily activities and/or sleep
Stinging
0—None No stinging
1—Mild Slight stinging sensation, not really bothersome
2—Moderate Definite stinging sensation that is somewhat bothersome
3—Severe Stinging sensation that causes definite discomfort and may interrupt daily activities and/or sleep
All data were recorded in the subject's data forms. Visual Evaluations of Cutaneous Tolerance following the subjective irritation query, the subjects had their face examined by a Dermatologist. The dermatological evaluations included erythema, dryness and edema grading of the face using the following scales:
Erythema Evaluation Score
Edema Evaluation Score
Dryness Evaluation Score
All findings were recorded on subjects' individual data recording forms. Visual Evaluations for Acne Lesions and Determining Global Severity of Acne following the cutaneous tolerance evaluations, the dermatologist documented on the subjects' data sheets, the number of acne lesions present on their faces. The lesion counts were taken from the facial area [forehead, left and right cheeks and chin above the jaw line (excluding the nose)]. The counts were added together to form three groups of lesion counts: inflammatory, non-inflammatory and total lesion counts. Open and closed comedones made up the non-inflammatory group; papules and pustules made up the inflammatory group and all of the lesions composed the total lesion count group.
The following are definitions of each lesion type counted:
In addition to lesion counting, the clinical evaluator assessed the overall (global) severity of each subject's acne according to the following scale:
Subject Instructions
Following the evaluations of acne lesions, each subject was given individually coded test articles (each test article was weighed prior to distribution) and instructed to use the test articles for six (6) consecutive weeks with Use Instructions to Apply to their face to clean skin at least twice a day. Applications must be at least 4 hours apart.
Mid-Study Call-In (Week 3)
The subjects were instructed to call the testing facility as necessary and/or after twenty-one (21) days of test article use to report any problems that might have occurred. During the mid-study call-in, the subjects were asked several questions.
Week 6 Visit (Day 42)
Following six consecutive weeks of at least twice daily test article use the subjects returned to the testing facility and underwent the same evaluations (subjective tolerance, cutaneous assessments, acne lesion assessments and determination of global severity of acne) as previously performed at baseline. The Medical Investigator did not have access to the subjects' previous data.
Additionally, the subjects' diary forms were collected and reviewed and for those test subjects who reported safety-related problems (e.g., dryness, burning), an adverse event form was completed. Also, as an indication of compliance, weights of the test articles were determined at the final (6-week) visit.
Finally, the subject completed a provided questionnaire.
Assignment of Treatment
Each subject who signed an informed consent form and successfully completed the screening procedures was enrolled in the study. Upon enrollment, each subject was assigned a unique subject number. Of the 59 subjects enrolled, 57 received the investigational product.
Results:
Summary of Demographics:
Summary of Serious Adverse Events
No serious adverse events were reported during this study.
Assessment of Tolerance
A summary of the data obtained from the dermatologist's evaluations of the face are located in Text Table 7-2. The scale used by the dermatologist is explained earlier.
Dermatologist's Observations of the Face:
The data in Text Table 2 reveal the following:
The data obtained from the subjective tolerance questionnaire are located in Text Table 3.
Subjective Tolerance:
The data in Text Table 3 reveal the following:
Acnegenicity Potential
A summary of baseline and post-baseline values for the acne lesion counts are shown in Text Table 4:
The results indicate that when the changes in post-baseline values for the number of acne lesions present on the subjects' faces were compared to baseline values:
Assessment of Cosmetic Acceptability
A Sponsor provided questionnaire was administered to each subject after 6 weeks of daily test article use. The questionnaire was designed to gauge the subjects' opinions of the test articles. A summary of the questionnaire responses are displayed in Text Table 5.
<0.0001
<0.0001
<0.0001
<0.0001
<0.0001
<0.0001
<0.0001
<0.0001
<0.0001
<0.0001
<0.0001
<0.0001
<0.0001
<0.0001
<0.0001
<0.0001
0.0005
0.0290
0.0013
<0.0001
<0.0001
<0.0001
<0.0001
<0.0001
<0.0001
<0.0001
<0.0001
<0.0001
<0.0001
<0.0001
The significance of the questionnaire responses was determined using a binomial test with an a priori 50/50 distribution assumption. The significance of the questionnaire responses was determined using a binomial test with an a priori 50/50 distribution assumption. The responses were pooled into two categories: the positive responses (very pleasant, pleasant, strongly agree, agree, just right, very quick, quick, test product, yes, would strongly recommend and recommend) were pooled into one category (success); the negative responses (very unpleasant, unpleasant, strongly disagree, disagree, too thick, too runny, very slow, slow, other product, no difference, no opinion, no and would not recommend) were pooled into another category (failure). “Not applicable” responses were not included in the calculations.
The data from Text Table 5 show that, 6 weeks after daily test article use, there was a significant proportion (P0.05) of the population (compared to an assumed 50/50 distribution) who:
Additionally, there was no significant difference, from an assumed 50/50 distribution, between:
Discussion and Overall Conclusions
Tolerance
Dermatologist's Evaluations
Under the conditions of this study, the Board Certified Dermatologist observed the following:
Subjective Irritation Query
Based on the Subjective Irritation Questionnaire distributed to the subjects at baseline and the Week 6 visit, the subjects reported the following:
Acnegenicity
An expert evaluator observed each subject's face to determine the following:
The data reveals the following:
As a conclusion, this example shows that the Non- acnegenicity of the composition which was the Main Objective of the study. With regards to the Secondary objective, the present composition according to the invention provides good tolerance. Manifestations of skin discomfort were mild in intensity and transient (possible skin discomfort when applied after shaving). With regards to the Cosmetic acceptability, the present composition according to the invention provide Good feed back.
| Filing Document | Filing Date | Country | Kind | 371c Date |
|---|---|---|---|---|
| PCT/EP2011/060967 | 6/29/2011 | WO | 00 | 3/22/2013 |
| Number | Date | Country | |
|---|---|---|---|
| 61344335 | Jun 2010 | US |
