Ccl20 as a predictor of clinical response to il23-antagonists

Abstract

The present invention relates to the use of the Chemokine (C—C motif) ligand 20 (CCL20) as a biomarker to stratify or identify populations of patients suffering from interleukin-23 (IL23)-mediated diseases (e.g., Crohn's disease) responsive to treatment with an, anti-IL23 antagonist (including, e.g., anti-IL23 antibodies). Levels of CCL20 above or below a predetermined threshold can be used, for example, (i) to determine whether a patient with an IL23-mediated disease or disorder such a Crohn's disease is eligible or non-eligible for treatment with a therapeutic agent, (ii) to determine whether treatment with a certain agent should be commenced, suspended, or modified, (iii) to diagnose whether the IL23-mediated disease is treatable or not treatable with a specific therapeutic agent, or (iv) to predict the outcome of treating the IL23-mediated disease with a specific therapeutic agent. CCL20 can be used in combination with other IL23 pathway biomarkers such as IL22 and/or lipocalin-2 (LCN2).

1 - 3 . (canceled) 
     
     
         4 . A method comprising
 (a) measuring the level of CCL20 in one or more of the samples obtained from a patient having an inflammatory bowel disease or instructing a clinical laboratory or healthcare provider to measure the level of CCL20 in the sample and/or submitting the one or more samples obtained from the patient to a clinical laboratory or healthcare provider to measure the level of CCL20 in the sample;   (b) determining to treat the patient if the patient is determined to have a lower or decreased level of CCL20 in one or more samples taken from the patient compared to a predetermined CCL20 threshold level, or compared to a CCL20 level in one or more control samples; and   (c) treating the patient or instructing a clinical laboratory or healthcare provider to treat the patient by administering an IL23 antagonist to the patient if the patient has a lower or decreased level of CCL20 in one or more samples taken from the patient compared to a predetermined CCL20 threshold level, or compared to a CCL20 level in one or more control samples.   
     
     
         5 - 8 . (canceled) 
     
     
         9 . The method according to  claim 4 , wherein the IL23 antagonist is an anti-IL23 antibody or antigen-binding fragment thereof. 
     
     
         10 . The method of  claim 9 , wherein the anti-IL23 antibody or antigen-binding fragment thereof binds to the p19 subunit of IL23 (SEQ ID NO: 15), to the p40 subunit of IL23 (SEQ ID NO: 16), or both. 
     
     
         11 . The method according to  claim 9 , wherein the anti-IL23 antibody or antigen-binding fragment thereof comprises ustekinumab, briakinumab, guselkumab, BI-655066, tildrakinumab, LY-3074828, or an antigen-binding fragment thereof. 
     
     
         12 . The method according to  claim 9 , wherein the anti-IL23 antibody or antigen-binding fragment thereof comprises
 (a) a heavy chain variable region (VH) comprising or consisting of SEQ ID NO: 7 and a light chain variable region (VL) comprising or consisting of SEQ ID NO: 8, or   (b) a heavy chain variable region (VH) comprising or consisting of SEQ ID NO: 45 and/or a light chain variable region (VL) comprising or consisting of SEQ ID NO: 46.   
     
     
         13 . The method according to  claim 9 , wherein the anti-IL23 antibody or antigen-binding fragment thereof comprises a heavy chain variable region comprising SEQ ID NOS:33, 34, and 35 and a light chain variable region comprising SEQ ID NOS:36, 37 and 38, or a heavy chain variable region comprising SEQ ID NOS:47, 48 and 49 and a light chain variable region comprising SEQ ID NOS:50, 51 and 52. 
     
     
         14 . The method according to  claim 12 , wherein the antibody is administered at a fixed dose. 
     
     
         15 . The method according to  claim 14 , wherein the fixed dose is between 10 and 1000 mg/dose. 
     
     
         16 . The method according to  claim 14 , wherein the fixed dose is about 210 mg/dose or about 700 mg/dose. 
     
     
         17 . The method according to  claim 4  wherein the patient has been treated before, during, after, or alternatively to the administration of an IL23 antagonist or anti-IL23 antibody or antigen-binding fragment with one or more additional therapies for the treatment of the inflammatory bowel disease. 
     
     
         18 . The method according to  claim 4 , wherein the one or more samples taken from the patient and/or the one or more control samples are one or more selected from the group consisting of: whole blood, blood serum, plasma, saliva, sputum, bronchoalveolar lavage fluid, cerebrospinal fluid, pleural fluid, pericardial fluid, ascites, synovial fluid, epithelial cells, urine, stool, skin, tissue biopsy, or a combination thereof. 
     
     
         19 . The method according to  claim 4 , wherein the one or more control samples are
 (a) a sample or samples obtained from normal healthy individuals;   (b) a sample or samples obtained from patients with a non-IL23-mediated disease; or   (c) a combination thereof.   
     
     
         20 . The method according to  claim 4 , wherein the patient's level of CCL20 is measured in an immunoassay. 
     
     
         21 . The method according to  claim 4 , further comprising determining the level of one or more 1L23 Pathway Biomarkers selected from the group consisting of 1L22, LCN2, IL17F, IL1 7A/F, IL23R, ID 2B, 1L6, 1L21, TNF, CCR6, CCL22, IL1R1, IFN-γ, S100A12, DEFB-2, DEFB-4, 11_1, SERPINB3, PI3/Elafin, LL37, RORγ, RORγT, IL26, S100A7, DEFB103B, and GM-CSF. 
     
     
         22 . The method according to  claim 4 , wherein the predetermined threshold level of CCL20 is selected from the group consisting of:
 (a) about the mean level of CCL20;   (b) about the median level of CCL20; and   (c) about the 1 st , 2 nd , 3 rd , 4 th , 5 th , 6 th , 7 th , 8 th , or 9 th  decile baseline level of CCL20 of 4.9 pg/ml, 11.88 pg/ml, 14.58 pg/ml, 16.37 pg/ml, 20.8 pg/ml, 22.65 pg/ml, 26.58 pg/ml, 32.1 pg/ml 39.76 pg/ml, or 54.57 pg/ml, respectively;   as measured in the serum using an immunoassay from a plurality of normal healthy patients, patients with a non-IL23-mediated disease, and/or patients with an inflammatory bowel disease.   
     
     
         23 . (canceled) 
     
     
         24 . The method according to  claim 4 , wherein the inflammatory bowel IL23 mediated disease or disorder is selected from the group consisting of: Crohn's disease, ulcerative colitis (UC), and celiac disease. 
     
     
         25 . (canceled) 
     
     
         26 . The method according to  claim 4 , wherein the patient is determined to have a level of CRP 5 mg/L and/or a level of FCP≥250 μg/g, a level of FCP≥200 μg/g, a level of FCP≥150 μg/g, a level of FCP 100 μg/g, or a level of FCP at least about 100 μg/g to at least about 250 μg/g in one or more samples taken from the patient. 
     
     
         27 . The method according to  claim 4 , wherein the predetermined CCL20 threshold level is at least about 5 pg/mL to at least about 55 pg/mL as measured using an immunoassay. 
     
     
         28 . The method according to  claim 27 , wherein the predetermined CCL20 threshold level is about 22.6 pg/mL as measured using an immunoassay. 
     
     
         29 . The method according to  claim 4 , wherein administration of the anti-IL23 antibody or antigen-binding fragment thereof results in a Crohn's Disease Activity Index (CDAI) response score reduction of at least 100 points and/or a reduction in the total CDAI score to below 150 points after first administering the anti-IL23 antibody or antigen-binding fragment thereof. 
     
     
         30 . The method according to  claim 29 , wherein the CDAI response score reduction of at least 100 points or reduction in the total CDAI score to below 150 points occurs within 1, 2, 4, 8, 12, 16 or 24 weeks or later after first administering the anti-IL23 antibody or antigen-binding fragment thereof. 
     
     
         31 . The method according to  claim 13 , wherein the antibody is administered at a fixed dose. 
     
     
         32 - 37 . (canceled)