IP Library Granted Patent US 12,281,171
Granted Patent B2
US 12,281,171 · App. 16/982,476 · Granted Apr 22, 2025

Periostin antibodies and methods of using the same

Inventors: Karen Abbott (Little Rock, AR); Nathalie Scholler (Playa Del Rey, CA)
Assignees: Bio Ventures, LLC; SRI International
C07K16/30A61K49/0058A61K49/16C07K16/3023G01N33/57492A61K2039/505C07K2317/56C07K2317/565C07K2317/622C07K2317/732
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Quick Facts
Patent No.
US 12,281,171
App. No.
16/982,476
Granted
Apr 22, 2025
Kind
B2
Abstract

The present inventors have developed antigen-binding reagents and antigen-binding conjugates that recognize a cancer-specific glycan (carbohydrate) modification on the human Periostin protein. Various in vitro and in vivo diagnostic and/or therapeutic methods using these compositions are also disclosed herein specifically for treating cancers that have amplification of the Mgat3 gene.

Claims (13)

1. An antigen-binding reagent comprising a heavy chain variable region comprising SEQ ID NO: 5 and a light chain variable region comprising SEQ ID NO: 6, wherein the antigen-binding reagent specifically binds to a bisecting N-glycan epitope of the human Periostin glycoprotein.

2. The antigen-binding reagent of claim 1 , wherein the antigen-binding reagent specifically binds to the bisecting N-glycan epitope of the human Periostin glycoprotein present on cancer cells.

3. The antigen-binding reagent of claim 2 , wherein the cancer cells comprise a cancer cell from a cancer selected from the group consisting of ovarian, glioblastoma, kidney, uterine, rectal, colon, adenocarcinoma and lung.

4. The antigen-binding reagent of claim 2 , wherein the cancer cells have increased expression of the Mgat3 gene.

5. The antigen-binding reagent of claim 1 , wherein the antigen-binding reagent comprises SEQ ID NO: 7.

6. An antigen-binding conjugate comprising the antigen-binding reagent of claim 1 linked to an agent, wherein the agent comprises a detectable imaging agent, a therapeutic agent, or an immunopolypeptide.

7. A cell comprising the antigen-binding reagent of claim 1 .

8. A pharmaceutical composition comprising the antigen-binding conjugate of claim 6 and a pharmaceutical carrier.

9. A method for imaging cancer cells in a subject comprising administering in an effective amount the antigen-binding conjugate of claim 6 to the subject, and generating an image of at least a portion of the subject using an imaging modality, wherein the antigen-binding conjugate comprises a detectable imaging agent.

10. The method of claim 9 , wherein the imaging of cells bound to the antigen-binding conjugate is indicative of the cells being cancer cells.

11. The method of claim 9 , wherein the imaging modality is selected from the group consisting of ultrasound, positron-emission tomography (PET), photon emission computed tomography (SPECT), nuclear magnetic resonance imaging (NMRI), optical imaging (OI) and computed tomography (CT).

12. A method of detecting cancer cells in a subject sample comprising obtaining a sample from the subject, and contacting the sample with the antigen-binding conjugate of claim 6 , and detecting binding of the antigen-binding conjugate to cells in the sample.

13. The method of claim 12 , wherein the binding of the antigen-binding reagent or the antigen-binding conjugate to the cells is indicative of the cells being cancer cells.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 21, 2020
From: ABBOTT, KAREN
To: BIOVENTURES, LLC
Reel/Frame 054129/0444 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 21, 2020
From: SCHOLLER, NATHALIE
To: SRI INTERNATIONAL
Reel/Frame 054129/0557 →
Continuity (3)
Provisional Application 62727915 · Sep 6, 2018
Provisional Application 62644681 · Mar 19, 2018
Related Publication 20210017288A1 · Jan 21, 2021
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