IP Library Granted Patent US 12,414,968
Granted Patent B2
US 12,414,968 · App. 17/990,402 · Granted Sep 16, 2025

Compositions comprising bacterially derived minicells and methods of using the same

Inventors: Himanshu Brahmbhatt (Sydney, AU); Jennifer MacDiarmid (Sydney, AU)
Assignee: EnGeneIC Molecular Delivery Pty Ltd
A61K35/74A61P35/00A61K47/6807A61K47/6879C12N15/111C12N15/113C12N2310/14C12N2310/141C12N2310/17
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Quick Facts
Patent No.
US 12,414,968
App. No.
17/990,402
Granted
Sep 16, 2025
Kind
B2
Abstract

Compositions and methods for treating cancer are provided. In particular, the compositions comprise an anti-neoplastic agent and either an interferon type I agonist or an interferon type II agonist, or a combination of an interferon type I agonist and an interferon type II agonist.

Claims (61)

1. A method of treating cancer in a subject in need, comprising administering to the subject an effective amount of a composition comprising:

(a) a therapeutically effective dose of purified, intact bacterially derived minicells comprising at least one anti-neoplastic agent, wherein the anti-neoplastic agent comprises PNU-159682 and/or doxorubicin, and

(b) an interferon type I agonist, an interferon type II agonist, or a combination of an interferon type I agonist and an interferon type II agonist,

wherein the interferon type I agonist is an oligonucleotide, wherein the oligonucleotide is double stranded DNA and comprises a sequence of about 40 nucleotides, and

wherein the interferon type II agonist is selected from the group consisting of C-glycosidific form of α-galactosylceramide (α-C-GalCer), α-galactosylceramide (α-GalCer), Imukin, IFN-γ, and a combination thereof,

wherein the cancer is selected from the group consisting of lung cancer, breast cancer, brain cancer, colon cancer, and pancreatic cancer.

2. The method of claim 1 , wherein the subject is a human, a non-human primate, a dog, a cat, a cow, a sheep, a horse, a rabbit, a mouse, or a rat.

3. The method of claim 1 , wherein element (b) of the composition comprises:

(i) a therapeutically effective dose of purified, intact bacterially derived minicells comprising an interferon type I agonist; or

(ii) a therapeutically effective dose of purified, intact bacterially derived minicells comprising an interferon type II agonist; or

(iii) a combination of:

(1) a therapeutically effective dose of purified, intact bacterially derived minicells comprising an interferon type I agonist; and

(2) a therapeutically effective dose of purified, intact bacterially derived minicells comprising an interferon type II agonist.

4. The method of claim 1 , wherein:

(a) the anti-neoplastic agent and the interferon type I agonist, the interferon type II agonist, or the combination of an interferon type I agonist and an interferon type II agonist, are packaged within two or more purified, intact bacterially derived minicells; or

(b) the anti-neoplastic agent and the interferon type I agonist, the interferon type II agonist, or the combination of an interferon type I agonist and an interferon type II agonist are packaged within three separate populations of purified, intact bacterially derived minicells.

5. The method of claim 1 , wherein the composition comprises the anti-neoplastic agent, the interferon type I agonist, and the interferon type II agonist, and wherein:

(a) the anti-neoplastic agent, the interferon type I agonist, and the interferon type II agonist are comprised within the same minicell;

(b) the anti-neoplastic agent and the interferon type I agonist are comprised within a first minicell, and the interferon type II agonist is comprised within a second minicell;

(c) the anti-neoplastic agent and the interferon type II agonist are comprised within a first minicell, and the interferon type I agonist is comprised within a second minicell;

(d) the anti-neoplastic agent is comprised within a first minicell, and the interferon type I agonist and the interferon type II agonist are comprised within a second minicell; or

(e) the anti-neoplastic agent is comprised within a first minicell, the interferon type I agonist is comprised within a second minicell, and the interferon type II agonist is comprised within a third minicell.

6. The method of claim 1 , wherein the composition does not comprise an interferon type I agonist.

7. The method of claim 1 , wherein the anti-neoplastic agent is PNU-159682.

8. The method of claim 1 , wherein the interferon type I agonist is an oligonucleotide selected from the group consisting of double stranded Z-DNA and B-DNA.

9. The method of claim 1 , wherein the interferon type II agonist is α-galactosylceramide (a-GalCer).

10. The method of claim 1 , wherein the composition further comprises:

(a) a bispecific ligand bound to the minicells comprising the anti-neoplastic agent; and/or

(b) a bispecific ligand bound to the minicells comprising the type I interferon agonist; and/or

(c) a bispecific ligand bound to the minicells comprising the type II interferon agonist.

11. The method of claim 10 , wherein the bispecific ligand:

(a) comprises a first arm that carries specificity for a minicell surface structure and a second arm that carries specificity for a non-phagocytotic mammalian cell surface receptor; and/or

(b) comprises a first arm that carries specificity for a minicell surface structure and a second arm that carries specificity for a non-phagocytotic mammalian cell surface receptor and wherein the minicell surface structure is an O-polysaccharide component of a lipopolysaccharide on the minicell surface; and/or

(c) comprises a first arm that carries specificity for a minicell surface structure and a second arm that carries specificity for a non-phagocytotic mammalian cell surface receptor wherein the non-phagocytotic mammalian cell surface receptor is capable of activating receptor-mediated endocytosis of the minicell; and/or

(d) comprises a bispecific antibody or antibody fragment; and/or

(e) comprises a bispecific antibody or antibody fragment and wherein the antibody or antibody fragment comprises a first multivalent arm that carries specificity for a bacterially derived minicell surface structure and a second multivalent arm that carries specificity for a cancer cell surface receptor, wherein the cancer cell surface receptor is capable of activating receptor-mediated endocytosis of the minicell.

12. The method of claim 1 , wherein the composition comprises fewer than about 1 contaminating parent bacterial cell per 10 7 minicells, fewer than about 1 contaminating parent bacterial cell per 10 8 minicells, fewer than about 1 contaminating parent bacterial cell per 10 9 minicells, fewer than about 1 contaminating parent bacterial cell per 10 10 minicells, or fewer than about 1 contaminating parent bacterial cell per 10 11 minicells.

13. The method of claim 1 , wherein the composition further comprises a pharmaceutically acceptable carrier.

14. The method of claim 1 , wherein the minicells are approximately 400 nm in diameter.

15. The method of claim 1 , wherein the composition is free of parent bacterial cell contamination removable through 200 nm filtration.

16. The method of claim 1 , wherein the composition comprises the following amount of minicells or killed bacterial cells:

(a) at least about 10 9 ;

(b) at least about 1 ×10 9 ;

(c) at least about 2×10 9 ;

(d) at least about 5×10 9 ;

(e) at least 8×10 9 ;

(f) no more than about 10 11 ;

(g) no more than about 1×10 11 ;

(h) no more than about 9×10 10 , or

(i) no more than about 8×10 10 .

17. The method of claim 1 , wherein the composition is administered:

(a) at least once a week over the course of several weeks; and/or

(b) at least once a week over several weeks to several months; and/or

(c) at least once a week for about 2, about 3, about 4, about 5, about 6, about 7, about 8, about 9, about 10, about 11, about 12, about 13, about 14, about 15, about 16, about 17, about 18, about 19 or about 20 weeks or more; and/or

(d) about twice every week; and/or

(e) about twice a week for about 2, about 3, about 4, about 5, about 6, about 7, about 8, about 9, about 10, about 11, about 12, about 13, about 14, about 15, about 16, about 17, about 18, about 19 or about 20 weeks or more.

18. The method of claim 1 , wherein:

(a) (i) the anti-neoplastic agent comprises PNU-159682, (ii) the interferon type I agonist is double stranded DNA and comprises a sequence of about 40 nucleotides, and (iii) the composition does not comprise a type II interferon agonist; or

(b) (i) the anti-neoplastic agent comprises PNU-159682, (ii) the interferon type I agonist is double stranded DNA and comprises a sequence of about 40 nucleotides, and (iii) the interferon type II agonist is Imukin; or

(c) the anti-neoplastic agent comprises doxorubicin, and wherein the interferon type II agonist is IFN-γ; or

(d) (i) the anti-neoplastic agent comprises doxorubicin, (ii) the interferon type II agonist is a-GalCer, and (iii) the composition does not comprise an interferon type I agonist.

Continuity (4)
Division 16518833 · Jul 22, 2019
Provisional Application 62788265 · Jan 4, 2019
Provisional Application 62702172 · Jul 23, 2018
Related Publication 20230079745A1 · Mar 16, 2023
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