Method of treating keloids or hypertrophic scars using antisense compounds targeting connective tissue growth factor (ctgf)

Abstract

This invention provides methods of preventing formation of, or treating, fibrotic lesions, including skin scars such as keloids and hypertrophic scars which comprise administering to the subject by one or more injection a compound which comprises a modified oligonucleotide, such as a modified antisense oligonucleotide, siRNA, or oligodeoxyribonucleotide, which inhibits expression of protein involved in fibrosis. Dosing of the antisense using an intradermal threading technique is also described.

1 . A method for treating a keloid, or preventing the formation, reformation, or growth of a keloid after an injury to the skin, in a subject in need thereof, which comprises administering to the subject by one or more injections at the site of the keloid or of the injury to the skin, a composition which comprises a modified oligonucleotide consisting of 12-30 linked nucleosides, at least a 12 nucleobase sequence portion of which is present within a sequence selected from the group consisting of SEQ ID NOs:38, 39, 40 and 166, or a salt or ester thereof, in an amount effective to treat, or to prevent the formation, reformation, or growth of, the keloid, wherein the effective amount is from 0.1 to 50 mg of the modified oligonucleotide per injection per linear centimeter of the keloid or of the injury to the skin. 
     
     
         2 . A method for treating a hypertrophic scar, or preventing the formation, reformation, or growth of a hypertrophic scar after an injury to the skin, in a subject in need thereof, which comprises administering to the subject by one or more injections at the site of the hypertrophic scar or of the injury to the skin, a composition which comprises a modified oligonucleotide consisting of 12-30 linked nucleosides, at least a 12 nucleobase sequence portion of which is present within a sequence selected from the group consisting of SEQ ID NOs:38, 39, 40 and 166, or a salt or ester thereof, in an amount effective to treat, or to prevent the formation, reformation, or growth of, the hypertrophic scar, wherein the effective amount is from 0.1 to 25 mg of the modified oligonucleotide per injection per linear centimeter of the hypertrophic scar or of the injury to the skin. 
     
     
         3 . A method for reducing formation, reformation, or growth of a scar or keloid at a site of an injury to the skin, or of treating a pre-existing scar or keloid, in a subject in need thereof, which comprises administering to the subject by one or more threading injections at the site of the injury or of the pre-existing scar or keloid, the composition of  claim 1 , or a salt or ester thereof, targeted to a nucleic acid encoding a connective tissue growth factor (CTGF) protein involved in fibrosis in an amount effective to inhibit expression of the protein and thereby reduce scar or keloid formation, reformation, or growth at the site of the injury or to treat the pre-existing scar or keloid. 
     
     
         4 . The method of  claim 3 , wherein the one or more threading injections comprise multiple intradermal threading injections per scar. 
     
     
         5 . A method for reducing formation, reformation, or growth of a fibrotic lesion at a site of an injury, or of treating a pre-existing fibrotic lesion, in a subject in need thereof, which comprises administering to the subject by one or more threading injections at the site of the injury or of the pre-existing fibrotic lesion, the composition of  claim 1 , or a salt or ester thereof, targeted to a nucleic acid encoding a connective tissue growth factor (CTGF) protein involved in fibrosis in an amount effective to inhibit expression of the protein and thereby reduce formation, reformation, or growth of the fibrotic lesion at the site of the injury or to treat the pre-existing fibrotic lesion. 
     
     
         6 - 13 . (canceled) 
     
     
         14 . The method of  claim 3 , wherein the effective amount is from 0.1 to 25 mg of the modified oligonucleotide per injection per linear centimeter of the site of the injury to the skin or of the pre-existing scar. 
     
     
         15 . The method of  claim 3 , wherein the modified oligonucleotide is administered at least once every two weeks for at least four weeks, at least once every three weeks for at least six weeks, at least once every four weeks for at least eight weeks, at least once every eight weeks for at least sixteen weeks, over a period of at least nine weeks, or over a period of 26 weeks. 
     
     
         16 - 20 . (canceled) 
     
     
         21 . The method of claim  6 , wherein the modified oligonucleotide consists of 12-30 linked nucleosides, at least a 10 nucleobase sequence portion of which is present within a nucleic acid sequence selected from the group consisting of SEQ ID NOs: 38, 39, 40 and 166. 
     
     
         22 - 24 . (canceled) 
     
     
         25 . The method of  claim 21 , wherein the modified oligonucleotide consists of 12-30 linked nucleosides, at least a 10 nucleobase sequence portion of which is present within a nucleic acid sequence selected from the group consisting of SEQ ID NOs: 38, 39, and 40. 
     
     
         26 . (canceled) 
     
     
         27 . The method of  claim 25 , wherein the modified oligonucleotide exhibits at least 67% inhibition of human CTGF mRNA expression. 
     
     
         28 . (canceled) 
     
     
         29 . The method of claim  22 , wherein the modified oligonucleotide has a sequence which is 100% identical over its length to a portion of any one of the sequences set forth in SEQ ID NOs: 38, 39, 40, or 166. 
     
     
         30 . The method of  claim 29 , wherein the modified oligonucleotide comprises at least one modified internucleoside linkage. 
     
     
         31 - 32 . (canceled) 
     
     
         33 . The method of  claim 29 , wherein at least one nucleoside comprises a modified sugar and wherein at least one nucleoside comprises a modified nucleobase. 
     
     
         34 - 42 . (canceled) 
     
     
         43 . The method of  claim 33 , wherein the modified oligonucleotide comprises: (a) a gap segment consisting of thirteen linked deoxynucleosides; (b) a 5′ wing segment consisting of two linked modified nucleosides; and (c) a 3′ wing segment consisting of five linked modified nucleosides; wherein the gap segment is positioned between the 5′ wing segment and the 3′ wing segment, wherein each modified nucleoside within each wing segment comprises a 2′-O-methoxyethyl sugar; and wherein each internucleoside linkage is a phosphorothioate linkage. 
     
     
         44 . (canceled) 
     
     
         45 . The method of claim  22 , wherein the sequence of the nucleobase is the sequence set forth in SEQ ID NO: 40. 
     
     
         46 - 54 . (canceled) 
     
     
         55 . The method of  claim 3 , wherein the modified oligonucleotide is present in a conjugate with a moiety which enhances uptake of the compound into, and/or increases residence time of the compound in, the subject, wherein the residence time is 7 to 60 days or in a delivery system which enhances uptake of the compound into, and/or increases residence time of the compound in, the subject, wherein the residence time is 7 to 60 days. 
     
     
         56 - 60 . (canceled) 
     
     
         61 . The method of  claim 3 , wherein the effective amount is about 5 mg of the modified oligonucleotide per injection per linear centimeter of the keloid, the injury to the skin, the site of the injury, or the pre-existing scar. 
     
     
         62 - 66 . (canceled) 
     
     
         67 . The method of  claim 3 , wherein the modified oligonucleotide is administered adjacent to the keloid, the injury to the skin, the site of the injury, or the pre-existing scar; along the entire length of the keloid, the injury to the skin, the site of the injury, or the pre-existing scar; along each side of the keloid, the injury to the skin, the site of the injury, or the pre-existing scar; or directly into the keloid, the injury to the skin, the site of the injury, or the pre-existing scar. 
     
     
         68 . (canceled) 
     
     
         69 . The method of  claim 67 , wherein the modified oligonucleotide is administered along each side of the keloid, the hypertrophic scar, the injury to the skin, the site of the injury, the pre-existing scar, or the pre-existing fibrotic lesion. 
     
     
         70 - 71 . (canceled) 
     
     
         72 . The method of  claim 3 , wherein the modified oligonucleotide is administered intradermally by threading technique. 
     
     
         73 - 76 . (canceled)