Anti-flt-1 antibodies for treating duchenne muscular dystrophy

a duchenne muscular dystrophy and antibody technology, applied in the field of anti-flt-1 antibodies for treating duchenne muscular dystrophy, can solve the problems of abnormal sarcolemal membrane function, dystrophin protein alteration or absence, shortage of oxygen and nutrients needed for cellular metabolism, etc., to promote angiogenesis, and increase the amount of vegf and/or other ligands

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a duchenne muscular dystrophy and antibody technology, applied in the field of anti-flt-1 antibodies for treating duchenne muscular dystrophy, can solve the problems of abnormal sarcolemal membrane function, dystrophin protein alteration or absence, shortage of oxygen and nutrients needed for cellular metabolism, etc., to promote angiogenesis, and increase the amount of vegf and/or other ligands

US20210206860A1Inactive Publication Date: 2021-07-08TAKEDA PHARMA CO LTD

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example 1

n and Characterization of High Affinity Anti-Flt-1 Antibodies

[0233]Generation of Antibodies

[0234]Monoclonal antibodies were generated against soluble Flt-1 using llama monoclonal antibody methodology. Briefly, llamas were immunized with recombinant human soluble Flt-1 (purchased from ABCAM) and the serum was collected.

[0235]Antibody Characterization

[0236]Antibodies that bound to human and mouse Flt-1 were further characterized for 1) VH family; 2) affinity for Flt-1; 3) IC50; 4) off-rate screening by Biacore assay, 5) cross-reactivity to cynomolgus Flt-1 and 6) binding to VEGF R2 and VEGF R3. Candidate antibodies against human Flt-1 (hFl-1) and mouse Flt-1 (mFlt-1) were characterized as shown in Table 4.

TABLE 4IC50 byBioassayHumanVHAffinity (nM)ELISA (pM)(% rescue)identity (%)AntibodyfamilyhFlt-1mFlt-1hFlt-1mFlt-1hFlt-1mFlt-1VHVL13B4150.61.413.3500>9072.294.393.710G12170.290.334003004487.590.88111A11200.233.3>9090.891.1

[0237]Pharmacokinetic properties of antibody 13B4 and 10G12 were...

example 2

n and Characterization of High Affinity Anti-Flt-1 Antibodies

[0244]Additional anti-Flt-1 monoclonal antibodies were generated as described above. These antibodies were further characterized for binding affinity to sFlt-1 antigen (by ELISA and Biacore), competition for VEGF in a sFlt-1:VEGF competition ELISA; and performance in a cell based assay.

[0245]Antibody Characterization—Binding to Target

[0246]The monoclonal anti-Flt-1 antibodies were assayed for binding to recombinant sFlt-1 antigen in an ELISA assay (FIG. 7). All antibodies demonstrated a dose-dependent increase in binding. Binding affinity of the anti-Flt-1 antibodies to mouse and human Flt-1 antigen was measured by surface plasmon resonance methodology (i.e., Biacore) (Table 6). The antibodies bound to human Flt-1 in the nanomolar range with antibody 11A11 demonstrating the highest binding affinity for human Flt-1. Biacore analysis also demonstrated that the antibodies did not cross-react with VEGF R2 or VEGF R3 (Table 6),...

example 3

ization of High Affinity Anti-Flt-1 Antibodies Generated by Light Chain Shuffling

[0251]Light chain shuffling of antibodies 18B6, 11A11 and 13B4 described in Example 2 was performed to increase the affinity and potency of the candidate antibodies.

[0252]Antibody Characterization—Binding to Target

[0253]The resulting antibodies displayed increased affinity for the Flt-1 antigen. For instance the KD of antibody 21C6 increased approximately 10-fold over that of the parent antibody, 11A11. Similarly, the KD of antibody 21B3 increased approximately 5-fold over that of the parent antibody, 13B4 (Table 7).

TABLE 7ka (1 / Ms)kd (1 / s)KD (M)18B63.95E+053.25E−048.22E−1024A82.24E+051.35E−046.05E−1021F92.84E+052.42E−048.52E−1011A113.17E+055.32E−051.68E−1021C61.31E+062.62E−052.00E−1121B67.59E+056.50E−058.57E−1113B44.16E+051.62E−043.89E−1021B35.58E+054.73E−058.48E−1121A12.23E+051.15E−045.16E−1021D18.44E+051.44E−041.71E−1021B44.96E+051.58E−043.19E−1019H63.32E+051.09E−043.29E−10

[0254]Antibody characteriza...

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Abstract

The present invention provides, among other things, anti-Flt-I antibodies and methods for treating muscular dystrophy, in particular, Duchenne muscular dystrophy (DMD). In some embodiments, a method according to the present invention in-cludes administering to an individual who is suffering from or susceptible to DMD an effective amount of an anti-Flt-I antibody or antigen-binding protein thereof such that at least one symptom or feature of DMD is reduced in intensity, severity, or frequency, or has delayed onset.

Description

RELATED APPLICATIONS[0001]This application is a continuation of Ser. No. 15 / 564,976, filed Oct. 6, 2017, which is a 35 U.S.C. § 371 National Stage Application of International Application No. PCT / US16 / 26352, filed Apr. 7, 2016, which claims priority to U.S. Provisional Application Ser. No. 62 / 144,251, filed Apr. 7, 2015, and U.S. Provisional Application Ser. No. 62 / 307,645, filed Mar. 14, 2016, the disclosure of each of which is hereby incorporated by reference.INCORPORATION-BY-REFERENCE OF SEQUENCE LISTING[0002]The content of the text file named “SHR-1189US_ST25.txt”, which was created on Oct. 6, 2017 and is 168 KB in size, is hereby incorporated by reference in its entirety.BACKGROUND[0003]Duchenne muscular dystrophy (DMD) is an X-linked recessive disorder affecting an estimated 1:3600 male births with an estimated 50,000 affected individuals worldwide. The disorder is marked by a progressive wasting of the muscles and affected children are wheelchair dependent by the time they re...

Claims

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Application Information

Patent Timeline

08 Jul 2021

Publication

US20210206860A1

IPC: C07K16/28; A61K39/395

CPC: C07K16/2863; A61K2039/505; A61K39/39566; C07K2317/70; C07K2317/76; C07K2317/74; C07K2317/515; C07K2317/33

Inventors: KEEFE, DENNIS; DE HAARD, HANS