Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Radical -xh acid – or anhydride – acid halide or salt thereof...
Reexamination Certificate
1999-01-04
2002-05-07
Raymond, Richard L. (Department: 1611)
Drug, bio-affecting and body treating compositions
Designated organic active ingredient containing
Radical -xh acid, or anhydride, acid halide or salt thereof...
C514S023000, C514S169000, C514S460000, C514S473000, C514S474000, C514S545000, C514S546000, C514S557000, C514S558000, C514S570000, C514S574000
Reexamination Certificate
active
06384079
ABSTRACT:
FIELD OF THE INVENTION
This application relates to topical compositions containing a 2-hydroxycarboxylic acid or a related compound for use in alleviating or improving the dermatological signs of aging, including changes or damage to skin, nail and hair associated with intrinsic aging, as well as changes or damage caused by extrinsic factors such as sunlight, radiations, air pollution, wind, cold, heat, dampness, chemicals, smoke, and cigarette smoking.
BRIEF DESCRIPTION OF THE PRIOR ART
In our U.S. Pat. No. 3,879,537 entitled “Treatment of Ichthyosiform Dermatoses” we described and claimed the use of topical compositions containing an alpha hydroxyacid to alleviate the symptoms of ichthyosis. In our U.S. Pat. No. 3,920,835 entitled “Treatment of Disturbed Keratinization” we described and claimed the use of topical compositions containing an alpha hydroxyacid to alleviate the symptoms of acne. In our U.S. Pat. No. 3,984,566 entitled “Method of Alleviating the Symptoms of Dandruff” we described and claimed the use of topical compositions containing an alpha hydroxyacid to improve the symptoms of dandruff.
In our U.S. Pat. No. 4,105,783 entitled “Therapeutic Treatment of Dry Skin”; U.S. Pat. No. 4,197,316 entitled “Treatment of Dry Skin”; and U.S. Pat. No. 4,380,549 entitled “Topical Treatment of Dry Skin”; we described and claimed the use of topical compositions containing an alpha hydroxyacid to alleviate or improve the symptoms of dry skin. In our U.S. Pat. No. 4,234,599 entitled “Treatment of Skin Keratoses with Alpha Hydroxyacids and Related Compounds”, we described and claimed the use of topical compositions containing an alpha hydroxyacid or the related compound to alleviate the symptoms of actinic or nonactinic skin keratoses. In our U.S. Pat. No. 4,363,815 entitled “Alpha Hydroxyacids, Alpha Ketoacids and Their Use in Treating Skin Conditions”, we described and claimed the use of topical compositions containing certain alpha hydroxyacids or the related compounds to improve skin conditions characterized by inflammation or disturbed keratinization.
In a report entitled “Topical Tretinoin for Photoaged Skin” by Albert M. Kligman, Gary L. Grove, Ryoji Hirose and James J. Leyden published in J. American Academy of Dermatology Vol.15, pages 836-859, 886-887, 1986, daily topical application of 0.05% tretinoin (also known as all-trans retinoic acid) in a cream has been found to improve photodamaged skin. In another report entitled “Topical Tretinoin Improves Photoaged Skin: A Double-blind Vehicle-controlled Study” by Jonathan S. Weiss, Charles N. Ellis, John T. Headington, Theresa Tincoff, Ted A. Hamilton and John J. Voorhees published in J American Medical Association Vol. 259 pages 527-532, 1988, daily topical application of 0.1% tretinoin as compared to vehicle alone application for 16 weeks has been shown to improve photoaged skin. One side-effect has been a dermatitis encountered by 92% of the patients participating in this study. The dermatitis was characterized by a patchy erythema, localized swelling, dry skin, and mild scaling. Patients complained about burning, tingling, or pruritus. In yet another report entitled “Topical Tretinoin in the Treatment of Aging Skin” by Jonathan S. Weiss, Charles N. Ellis, John T. Headington and John J. Voorhees published in J. American Academy of Dermatology Vol.19, pages 169-175, 1988, topical application of 0.1% tretinoin cream for 8 to 12 months has been found to improve clinical signs of aging skin. The side effects have been burning sensation in the eyes and mild skin irritations.
Parent application Ser. No. 07/469,738, now abandoned, described in addition to the main subject certain compositions containing hydroxycarboxylic acids and the related ketocarboxylic acids for topical treatment of wrinkles and skin changes associated with aging. The related application of Ser. No. 07/393,749, now U.S. Pat. No. 5,091,171, described in addition to the main subject a topical treatment to alleviate or remedy warts, nail infections, age spots, wrinkles and aging related skin changes with a composition containing certain alpha hydroxyacids or the related compounds. We have now discovered that 2-hydroxycarboxylic acids and related compounds have much broader utilization than previously disclosed.
SUMMARY OF THE INVENTION
Accordingly, it is an object of this invention to provide methods and compositions which can alleviate signs of skin, nail and hair changes associated with intrinsic and/or extrinsic aging.
We have now discovered that 2-hydroxycarboxylic acids and related compounds have unusual qualities as well as broader utilities which have not been disclosed in the prior art. Topical applications of compositions containing a 2-hydroxycarboxylic acid or a related compound have been found to improve cosmetic as well as clinical signs of changes in skin, nails and hair associated with intrinsic aging, or the damages caused by extrinsic factors such as sunlight, radiations, air pollution, wind, cold, dampness, heat, chemicals, smoke, and cigarette smoking. The signs of skin changes associated with intrinsic aging and the skin damages caused by extrinsic factors include thinning of skin; deepening of skin lines; wrinkles; blemishes; blotches; nodules; atrophy; pigmented spots; precancerous lesions; elastotic changes characterized by leathery, coarse, rough, dry and yellowish skin; and telangiectatic skin. The signs of nails and hair changes associated with intrinsic aging and the damages caused by extrinsic factors include thinning, fragility, splitting, lack of luster, uneven surface, and loss of flexibility and elasticity. 2-Hydroxycarboxylic acids and their related compounds which are useful for topical treatment of skin, nail and hair changes associated with intrinsic and/or extrinsic aging include, inter alia, 2-hydroxyethanoic acid, 2-hydroxypropanoic acid, 2-methyl 2-hydroxypropanoic acid, 2-phenyl 2-hydroxyehtanoic acid, 2-phenyl 2-methyl 2-hydroxyethanoic acid, 2-phenyl 3-hydroxypropanoic acid, 2,2-diphenyl 2-hydroxyethanoic acid, 2-hydroxybutane-1,4-dioicacid, 2,3-dihydroxybutane-1,4-dioic acid, 2-carboxy 2-hydroxypentane-1,5-dioic acid, 2-ketopropanoic acid, methyl 2-ketopropanoate, ethyl 2-ketopropanoate, and gluconolactone.
Additional objects and advantages of the invention will be set forth in part in the description that follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objects and the advantages of this invention may be realized and obtained by means of the compositions and methods particularly pointed out in the appended claims.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Cutaneous aging is associated with intrinsic factors with or without the additional factors of extrinsic origin. The intrinsic aging is due to internal physiologic functions and is an inherent aging process of living beings, which has not been reversible nor preventable. However, a modification, improvement or alleviation of the signs associated with cutaneous aging is now possible in accordance with this invention. Extrinsic aging, on the other a hand, is due to external factors such as sunlight, radiations, air pollution, wind, cold, dampness, heat, chemicals, smoke, and cigarette smoking. A modification, improvement or alleviation of the signs associated with the extrinsic aging of skin, nails and hair is also now possible in accordance with this invention. Moreover, in some cases, it may be possible to eradicate such signs of intrinsic and extrinsic aging.
In the protected areas of skin such as abdomen and upper arm, the signs of skin aging which are caused by intrinsic factors include progressive thinning of skin, deepening of skin lines, wrinkles, dry and lusterless skin surface, loss of skin elasticity and recoilability. In the sun exposed areas of skin such as face and hands, the signs of intrinsic aging plus those of photoaging include deep wrinkles; marked loss of elasticity and recoilability; coarse, uneven and dry skin; blemished and leathery skin; loss of skin lubricating substance
Scott Eugene J. Van
Yu Ruey J.
Akin Gump Strauss Hauer & Feld L.L.P.
Raymond Richard L.
TriStrata Technology, Incorporated
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