Glioblastoma multiforme-reactive antibodies and methods of use thereof

Abstract

The present disclosure is generally related to antibodies that bind specifically to glioblastoma multiforme (GBM) cells. In particular, the present disclosure provides compositions comprising human single chain or full-length antibodies that bind tumor cells. Additionally the present disclosure provides methods of using the anti-GBM antibodies.

1 . An isolated antibody that binds specifically to glioblastoma multiforme (GBM) tumor sphere cells, wherein the anti-GBM antibody comprises an antigen binding site that comprises:
 a heavy chain comprising (i) complementarity determining region (CDR)-H1 comprising SEQ ID NO: 67, (ii) CDR-H2 comprising SEQ ID NO: 69, and (iii) CDR-H3 comprising SEQ ID NO 71, and a light chain comprising (iv) CDR-L1 comprising SEQ ID NO: 75, (v) CDR-L2 comprising SEQ ID NO 77, and (vi) CDR-L3 comprising SEQ ID NO 79.   
     
     
         2 - 5 . (canceled) 
     
     
         6 . The anti-GBM antibody of  claim 1 , wherein the antigen binding site comprises the heavy chain variable region of SEQ ID NO: 73, and the light chain variable region of SEQ ID NO: 81. 
     
     
         7 . An isolated anti-GBM antibody that competes for binding to glioblastoma multiforme (GBM) tumor sphere cells with the anti-GBM antibody of  claim 1 . 
     
     
         8 . The anti-GBM antibody of  claim 1 , wherein the antibody inhibits proliferation of GBM tumor sphere cells. 
     
     
         9 . The anti-GBM antibody of  claim 1 , wherein the antibody is an antibody fragment. 
     
     
         10 . The anti-GBM antibody of  claim 9 , wherein the fragment is an Fab, F(ab′) 2 , Fv or Sfv fragment. 
     
     
         11 . The anti-GBM antibody of  claim 1 , wherein the antibody is a full-length human immunoglobulin g (IgG) antibody. 
     
     
         12 . The anti-GBM antibody of  claim 1 , wherein the antibody is coupled to one of the group consisting of a detectable marker, and a chemotherapeutic agent. 
     
     
         13 . The anti-GBM antibody of  claim 12 , wherein the antibody is coupled to a detectable marker selected from the group consisting of a radioisotope, a metal chelator, an enzyme, a fluorescent compound, a bioluminescent compound, and a chemiluminescent compound. 
     
     
         14 . The anti-GBM antibody of  claim 13 , wherein the radioisotope comprises one of the group consisting of  212 Bi,  131 I,  131 In,  90 Y,  186 Re,  211 At,  125 I,  188 Re,  153 Sm,  213 Bi,  32 P, and  177 Lu. 
     
     
         15 . The anti-GBM antibody of  claim 12 , wherein the antibody is coupled to a chemotherapeutic agent. 
     
     
         16 . An isolated nucleic acid encoding the anti-GMB antibody of  claim 1 . 
     
     
         17 . An expression vector comprising the nucleic acid of  claim 16 , in operable combination with a regulatory sequence. 
     
     
         18 . A host cell comprising the expression vector of  claim 17 . 
     
     
         19 . A method for characterizing a biopsy sample from a patient, comprising:
 a) contacting the sample with the anti-GBM antibody of  claim 1 ; and   b) detecting the binding of the anti-GBM antibody to cells of the sample.   
     
     
         20 . The method of  claim 19 , wherein the biopsy sample is from a brain tumor. 
     
     
         21 . A method for treating a cancer patient, comprising:
 A) providing a composition comprising an anti-GBM antibody comprising an antigen binding site that comprises
 a heavy chain comprising (i) complementarity determining region (CDR)-H1 comprising SEQ ID NO: 67, (ii) CDR-H2 comprising SEQ ID NO: 69, and (iii) CDR-H3 comprising SEQ ID NO: 71, and a light chain comprising (iv) CDR-L1 comprising SEQ ID NO: 75, (v) CDR L2 comprising SEQ ID NO: 77, and (vi) CDR-L3 comprising SEQ ID NO: 79; and 
   B) administering to the patient the composition in an amount effective to inhibit proliferation of tumor cells of the patient.   
     
     
         22 . The method of  claim 21 , wherein the tumor cells are glioblastoma multiforme (GBM) tumor cells. 
     
     
         23 . The method of  claim 21 , wherein the composition is administered intravenously or intracranially. 
     
     
         24 . The method of  claim 21 , further comprising administering an effective amount of an additional chemotherapeutic agent to the patient. 
     
     
         25 . The method of  claim 21 , further comprising one or both of surgically resecting the tumor cells and administering radiation therapy. 
     
     
         26 . A pharmaceutical composition comprising the anti-GBM antibody of  claim 1  and a pharmaceutically acceptable excipient.