WO 2010/135449 Al
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(12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (10) International Publication Number (43) International Publication Date 25 November 2010 (25.11.2010) WO 2010/135449 Al (51) International Patent Classification: (81) Designated States (unless otherwise indicated, for every A61K 31/74 (2006.01) kind of national protection available): AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BR, BW, BY, BZ, (21) International Application Number: CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, PCT/US2010/035440 DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, (22) International Filing Date: HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, 19 May 2010 (19.05.2010) KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, (25) Filing Language: English NO, NZ, OM, PE, PG, PH, PL, PT, RO, RS, RU, SC, SD, (26) Publication Language: English SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (30) Priority Data: 61/179,577 19 May 2009 (19.05.2009) US (84) Designated States (unless otherwise indicated, for every kind of regional protection available): ARIPO (BW, GH, (71) Applicant (for all designated States except US): GM, KE, LR, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, PLUROGEN THERAPEUTICS, INC. [US/US]; 503 ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, MD, RU, TJ, Broadleaf Way, Charlottesville, Virginia 2291 1 (US). TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, (72) Inventors; and LV, MC, MK, MT, NL, NO, PL, PT, RO, SE, SI, SK, (75) Inventors/Applicants (for US only): ROLLER, Neal SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, [US/US]; c/o PluroGen Therapeutics, Inc., 503 Broadleaf GW, ML, MR, NE, SN, TD, TG). Way, Charlottesville, Virginia 2291 1 (US). RODE- HEAVER, George [US/US]; 845 Carlins Way, Char Published: lottesville, Virginia 22903 (US). CASSINO, Roberto — with international search report (Art. 21(3)) [IT/IT]; Turin (IT). (74) Agent: SHYJAN, Anne; Pepper Hamilton LLP, 500 Grant Street, 50th Floor, Pittsburgh, Pennsylvania 1521 9-2502 (US). (54) Title: SURFACE ACTIVE AGENT COMPOSITIONS AND METHODS FOR ENHANCING OXYGENATION, REDUC ING BACTERIA AND IMPROVING WOUND HEALING (57) Abstract: This present invention relates generally to the use of novel formulations comprising a surface active polymer to en hance oxygenation in skin and other soft tissue. The present invention also discloses formulations that can be used to improve clinical outlook and reducing bacteria. Methods of making and using the same are also disclosed. A. Title: SURFACE ACTIVE AGENT COMPOSITIONS AND METHODS FOR ENHANCING OXYGENATION, REDUCING BACTERIA AND IMPROVING WOUND HEALING B. Cross-Reference to Related Applications [0001] This application claims priority to and benefit of U.S. Provisional Application No. 61/179,577, entitled "Poloxamer Formulations and Methods For Enhancing Oxygenation, Reducing Bacteria and Improving Wound Healing at a Site of Treatment" filed on May 19, 2009, the entire contents of which are hereby incorporated by reference in its entirety. C. Government Interests: Not Applicable D. Parties to a Joint Research Agreement: Not Applicable E. Incorporation by Reference of Material Submitted on a Compact Disc: Not Applicable F. Background [0002] Poloxamers are water-soluble triblock copolymers composed of hydrophilic polyethylene oxide (PEO) and hydrophobic polypropylene oxide (PPO) blocks linked together. The amphiphilic nature of these block copolymers can be varied by controlling the length of the PEO and/or PPO block components (Ahmed et al., 2001). Several members of this poloxamer family of chemicals (such as poloxamer 188 and 407) are known to be biocompatible and non-toxic to mammalian cells and tissues, making them useful for biomedical applications. These compounds are surface acting (or "surface active") agents (i.e. "surfactants") and known to incorporate into or onto mammalian cell membranes, and thereby reduce protein adsorption and cell adhesion. [0003] The skin serves as a protective barrier against the environment. The skin serves as a barrier to infection and prevents the loss of water and electrolytes from the body. Thus, the loss of the integrity of large portions of the skin as a result of illness or injury can lead to major disability or even death. [0004] Every year in the United States there are 1.1 million burn patients who require medical attention and 6.5 million patients are reported to have chronic skin ulcers caused by pressure, venous stasis, or diabetes mellitus. Thus, acceleration of skin wound healing has been an active area of medical research and improved designs of skin repair materials have been sought for decades. [0005] There is a long felt need in the art for compositions and methods useful for treating injuries and wounds topically. The present invention addresses the need by providing novel formulations and methods of treating skin and other soft tissues that enhance oxygenation, reduce bacteria at the treated site, improve healing, and any combination thereof. G. Summary of the Invention [0006] In some embodiments, the present invention provides methods of increasing oxygenation at a site on a subject comprising contacting a site with a first composition comprising at least one surface active agent and optionally at least one additional therapeutic agent, wherein upon contacting the site with the composition the site has increased oxygenation. In some embodiments the site has been identified as a site needing increased oxygenation. In some embodiments, the subject is a subject in need of increased oxygenation at said site. In some embodiments, the at least one surface active agent is a surface active copolymer. In some embodiments, the composition comprises about 0-10% w/w of the surface active agent. In some embodiments, the composition comprises about 5% w/w of said surface active agent. [0007] In some embodiments, the present invention provides compositions for treating a site to increase oxygenation, reduce bacterial count, and/or increase healing at the treated site on a subject comprising at least one surface active agent and optionally at least one additional therapeutic agent. In some embodiments, the compositions are liquids or gels. [0008] In some embodiments, the present invention provides fabric materials comprising a composition comprising at least one surface active agent and optionally at least one additional therapeutic agent. In some embodiments, the at least one surface active agent is an surface active copolymer. In some embodiments, the fabric materials are used to increase oxygenations, reduce bacterial count, or improve wound healing at a site on a subject. H. Description of Drawings: None L Detailed Description [0009] This invention relates generally to the use of novel formulations comprising a surface active polymer to enhance oxygenation in skin and other soft tissue. The formulations can also be used to improve clinical outlook, including to improve healing and reduce bacteria. [0010] As used herein, the term "composition" can also be referred to as a formulation. The composition can consist of one ingredient or comprise more than one ingredients. The number of components or ingredients does not differentiate between a composition or a formulation. In some embodiments, the composition is a pharmaceutical composition. In some embodiments, the composition is a therapeutic composition. [0011] The present invention is based on the discovery described herein that the administration (e.g. topical) of a composition comprising a surface active copolymer such as a poloxamer can be used, in some embodiments, to increase oxygenation, reducing bacteria, and/or improving healing at a tissue site, and any combination thereof. In some embodiments, the present invention provides compositions and methods for increasing oxygenation, reducing bacteria, and/or improving healing at a treated site. In some embodiments, the compositions can be used to increase oxygenation, reduce bacteria, and/or improve healing at the site of specific injuries or at sites associated with certain diseases and conditions. The compositions and methods can also benefit healthy skin and other soft tissue. Without wishing to be bound by theory, it is hypothesized that the surfactant component acts as an oxygen reservoir and/or delivery vehicle to increase oxygenation, reduce bacteria, and improve healing at a treated site. [0012] In some embodiments, the present invention provides methods of treating a tissue site. In some embodiments, the method comprises applying (e.g. topically) to the tissue site a pharmaceutical composition comprising a surfactant and optionally at least one additional therapeutic agent. In some embodiments, the amount of the composition that is applied is an amount effective to increase oxygenation, reduce bacteria and/or improve healing at the tissue site. In some embodiments, the composition comprises at least one surface active copolymer and optionally at least one additional therapeutic agent to increase oxygenation, reduce bacteria and/or improve healing at the tissue site. [0013] In some embodiments, the at least one surface active copolymer is a poloxamer, a meroxapol, or a poloxamine. In some embodiments, the pharmaceutical composition comprises poloxamer 188. [0014] Disclosed herein are formulations of surfactants, for example, poloxamers or other surface