8-K

 

 

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

 

 

FORM 8-K

 

 

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934

Date of report (Date of earliest event reported): May 22, 2014

 

 

ZIOPHARM Oncology, Inc.

(Exact Name of Registrant as Specified in Charter)

 

 

 

Delaware   001-33038   84-1475672

(State or Other Jurisdiction

of Incorporation)

 

(Commission

File Number)

 

(IRS Employer

Identification No.)

One First Avenue, Parris Building 34, Navy Yard Plaza

Boston, Massachusetts

  02129
(Address of Principal Executive Offices)   (Zip Code)

(617) 259-1970

(Registrant’s telephone number, including area code)

Not applicable

(Former Name or Former Address, if Changed Since Last Report)

 

 

Check the appropriate box below if the Form 8-K is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

 

¨ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425).

 

¨ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12).

 

¨ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)).

 

¨ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)).

 

 

 


Item 7.01 Regulation FD Disclosure

On May 22, 2014, ZIOPHARM Oncology, Inc., or the Company, announced the presentation of results demonstrating the potent anti-tumor and anti-cancer stem cell (CTC) effects of Ad-RTS-IL-12 in a glioma (brain cancer) model, and in other preclinical and clinical settings. The presentation, titled “Intratumoral Regulated Expression of IL-12 as a Gene Therapy Approach to Immunotherapy,” was presented in an oral session at the 17th Annual Meeting of the American Society of Gene and Cell Therapy, held May 21-24 in Washington, D.C.

A copy of the above referenced press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and a copy of the above referenced presentation is furnished as Exhibit 99.2 to this Current Report on Form 8-K. This information, including the information contained in the press release furnished as Exhibit 99.1 and the presentation furnished as Exhibit 99.2, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, and is not incorporated by reference into any of the Company’s filings, whether made before or after the date hereof, regardless of any general incorporation language in any such filing.

 

Item 9.01 Financial Statements and Exhibits

(d) Exhibits

 

Exhibit
No.

  

Description

99.1    Press release of the Company dated May 22, 2014
99.2    Presentation of the Company dated May 22, 2014

 

2


SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

 

    ZIOPHARM Oncology, Inc.
    By:  

/s/ Kevin G. Lafond

Date: May 22, 2014

    Name:   Kevin G. Lafond
    Title:   Vice President, Chief Accounting Officer and Treasurer

 

3


INDEX OF EXHIBITS

 

Exhibit
No.

  

Description

99.1    Press release of the Company dated May 22, 2014
99.2    Presentation of the Company dated May 22, 2014
EX-99.1

Exhibit 99.1

 

LOGO

ZIOPHARM Announces Oral Presentation Highlighting Ad-RTS-IL-12

Results Correlated with Reducing Cancer Stem Cells in the Brain

at ASGCT 17th Annual Meeting

BOSTON, MA – May 22, 2014 – ZIOPHARM Oncology, Inc. (Nasdaq: ZIOP), a biopharmaceutical company focused on the development and commercialization of new cancer therapies, announced today results demonstrating the potent anti-tumor and anti-cancer stem cell (CTC) effects of Ad-RTS-IL-12 in a glioma (brain cancer) model, and in other preclinical and clinical settings. Ad-RTS-IL-12 is a novel DNA-based therapeutic candidate for the controlled expression of IL-12, an important protein for stimulating an anti-cancer T cell immune response. The presentation, titled “Intratumoral Regulated Expression of IL-12 as a Gene Therapy Approach to Immunotherapy,” was presented in an oral session at the 17th Annual Meeting of the American Society of Gene and Cell Therapy (ASGCT), held May 21-24 in Washington, DC.

Results from human and laboratory studies of Ad-RTS-IL-12 demonstrate that precise control of IL-12 gene expression levels can be achieved using Intrexon Corporation’s (NYSE: XON) RheoSwitch Therapeutic System® (RTS®). Rapid, tight modulation of in vivo expression of IL-12 using the activator ligand veledimex was demonstrated across these studies. When IL-12 expression is “switched on” it rapidly leads to expression and an immune response. This immune response is characterized by an increase in tumor infiltrating lymphocytes with system wide immune activation. This modulated immune response has resulted in anti-tumor effects in both injected and systemic non-injected legions in Phase 1 and Phase 2 studies of Ad-RTS-IL-12 in subjects with melanoma and breast cancer.

The data presented today further demonstrate that Ad-RTS-IL-12 has potent anti-cancer effects in a glioma model, showing both a reduction in tumor mass and prolonged survival when compared to existing treatment standards. The data also show a significant reduction in brain cancer stem cells, as measured by dramatically reduced nestin levels. Brain cancer stem cells are thought to play a critical role in recurrence and metastasis.

“Ad-RTS-IL-12 seems to offer precise control over a potent immuno-oncology weapon, the IL-12 cytokine,” said Antonio Chiocca, MD, PhD, Prof. and Chairman of Neurosurgery at Brigham and Women’s Hospital and Harvard Medical School. “With malignant glioma in particular, delivery of IL-12 is one of several promising experimental approaches being tested, but unlike other therapies the ability to control IL-12 expression in vivo may prove to be ground breaking. This is increasingly being demonstrated both in preclinical models, as well as in the clinic, where patients are showing reversal of immuno-toxicity, including cytokine storm, and then resume therapy.” He continued: “IL-12’s role in reducing cancer stem cells is also very encouraging, as the role of these cells in recurrence and metastasis is increasingly well understood. I look forward to further data from these clinical and preclinical programs, as well as to the initiation of a Phase 1 study of Ad-RTS-IL-12 in brain cancer.”


About ZIOPHARM Oncology, Inc.:

ZIOPHARM Oncology is a Boston, Massachusetts-based biotechnology company employing novel gene expression and control technology to deliver DNA for the treatment of cancer. ZIOPHARM’s technology platform employs Intrexon Corporation’s RheoSwitch Therapeutic System® technology to turn on and off, and precisely modulate, gene expression at the cancer site in order to improve the therapeutic index. This technology is currently being evaluated in Phase 2 clinical studies of the immune system cytokine interleukin-12 for the treatment of breast cancer and advanced melanoma. Multiple new Investigational New Drug Applications for new targets using synthetic biology technology are expected through 2015. ZIOPHARM is also developing novel small molecules as potential cancer therapeutics.

Forward-Looking Safe Harbor Statement:

This press release contains certain forward-looking information about ZIOPHARM Oncology, Inc. that is intended to be covered by the safe harbor for “forward-looking statements” provided by the Private Securities Litigation Reform Act of 1995, as amended. Forward-looking statements are statements that are not historical facts. Words such as “expect(s),” “feel(s),” “believe(s),” “will,” “may,” “anticipate(s)” and similar expressions are intended to identify forward-looking statements. These statements include, but are not limited to, statements regarding our ability to successfully develop and commercialize our therapeutic products; our ability to expand our long-term business opportunities; financial projections and estimates and their underlying assumptions; and future performance. All of such statements are subject to certain risks and uncertainties, many of which are difficult to predict and generally beyond the control of the company, that could cause actual results to differ materially from those expressed in, or implied or projected by, the forward-looking information and statements. These risks and uncertainties include, but are not limited to: whether Ad-RTS-IL-12, palifosfamide, darinaparsin, indibulin, or any of our other therapeutic products will advance further in the clinical trials process and whether and when, if at all, they will receive final approval from the U.S. Food and Drug Administration or equivalent foreign regulatory agencies and for which indications; whether Ad-RTS-IL-12, palifosfamide, darinaparsin, indibulin, and our other therapeutic products will be successfully marketed if approved; whether any of our other therapeutic product discovery and development efforts will be successful; our ability to achieve the results contemplated by our collaboration agreements; the strength and enforceability of our intellectual property rights; competition from other pharmaceutical and biotechnology companies; the development of, and our ability to take advantage of, the market for our therapeutic products; our ability to raise additional capital to fund our operations on terms acceptable to us; general economic conditions; and the other risk factors contained in our periodic and interim SEC reports filed from time to time with the Securities and Exchange Commission, including but not limited to, our Annual Report on Form 10-K for the fiscal year ended December 31, 2013 and our Quarterly Report on Form 10-Q for the quarter ended March 31, 2014. Readers are cautioned not to place undue reliance on these forward-looking statements that speak only as of the date hereof, and we do not undertake any obligation to revise and disseminate forward-looking statements to reflect events or circumstances after the date hereof, or to reflect the occurrence of or non-occurrence of any events.

Contact:

Lori Ann Occhiogrosso

Director of Corporate Communication

ZIOPHARM Oncology, Inc.

617-259-1987

locchiogrosso@ziopharm.com

EX-99.2
INTRATUMORAL REGULATED
EXPRESSION OF IL-12 AS A
GENE THERAPY APPROACH
TO IMMUNOTHERAPY
John
Nemunitis
1
,
John
A.
Barrett
2
,
Francois
Lebel
2
,
Thomas
D.
Reed
3
,
E.
Antonio
Chiocca
4
,
Antonio
M.
Omuro
5
,
Larry
Norton
5
,
Jonathan
Lewis
2
1
Mary
Crowley
Cancer
Research
Centers,
Dallas,
TX,
United
States,
75201
2
ZIOPHARM Oncology Inc., Boston, MA, United States, 02129
3
Intrexon Corporation, Germantown, MD, United States, 20876
4
Brigham and Woman’s Hospital, Harvard Medical School, Boston, MA, United States, 02115
5
Memorial Sloan-Kettering Cancer Center, New York, NY, United States, 10065
Exhibit 99.2


Background & Rationale IL-12 in Glioma
Tumors escape the immune system through
the process of immunoediting. Thus,
restoration of the immune system’s ability to
detect the tumor should result in improved
treatment outcomes.
Localized IL-12 administration has been
shown to have antitumor activity that is
mediated by direct tumor cell cytotoxicity, and
enhancement of immuno-regulatory activities
including activation of anti-tumor natural killer
(NK) cells, CD4
+
T cells and CD8
+
T cells.


Background & Rationale IL-12 in Glioma
Roy
&
Kranz
(University
of
Illinois)
IL-12.
Journal
of
Immunology,
2000,
165:
7293–7299.
Model
SV11
Transgenic
mouse
administered
recombinant
mIL-12
i.c.
Findings
Increased
survival
infiltration
of
activated
CD8
and
CD4
T
cells.
Vom
Berg
&
Becher
(University
of
Zurich)
J
Exp
Med,
2013,
210:
2803-2811.
Model:
GL261
transduced
to
constitutively
express
IL-12
i.c.
Findings:
Increased
survival
combination of IL-12 + CTLA4 elicits decrease Tregs while increasing Teff.
Dimeco
&
Olivi
Johns
Hopkins
School
of
Medicine
&
Istituto
Nazionale
Tumori,
Milan,
Italy)
J
Neurosurg
2000,
92:419–427,
Model:
Rat
9L
gliosarcoma
cells
expressing
IL-12.
Findings
Local
delivery
of
IL-12
in
rat
brain
prolongs
survival
in
animals
challenged
i.c.
with
a
malignant
glioma
cells.
Sonabend
&
Lesniak
(University
of
Chicago).
Anti-Cancer
Drugs
2008,
19:133–142.
Model:
GL-261
orthotopic
glioma
model.
Findings:
Synergy
in
survival
with
locally
administered
pmIL-12/PPC
+
biodegradable
carmustine
Markert
&
Whitley
(University
of
Alabama)
Journal
of
Virology
2012,86:
5304–5313
Model:
4C8
glioma
cells
orthotopic
B6D2F1
mouse.
Findings:
Hsv
mutant
M002
expressing
IL-12
demonstrated
prolonged
survival
vs.
control
Liu
&
Yu
(Cedars
Sinai
Medical
Center)
Cancer
Gene
Therapy
(2002)
9,
9–15
Model:
GL-26
orthotopic
mouse.
Ad5-mIL-12
Findings:
Survival
was
significantly
prolonged
in
Ad-mIL-12–treated
animals
with
increased
CD4+
and
CD8+
T-
cell
infiltration
(
:
:
:


1.
The
Switch
Components:
The
RTS®
gene
program
includes
2
receptor
protein
fusions:
VP16-RXR and Gal4-EcR.  They form unstable and unproductive heterodimers in the
absence of any ligand.
2.
The
Inducible
Promoter:
A
customizable
promoter
to
which
basal
transcription
proteins
are recruited and the target gene is transcribed.
3.
The
Activator
Ligand
(veledimex):
An
ecdysone
analog,
diacylhydrazine-based
small
molecule functions as an activator. In the presence of the ligand, the protein
heterodimer changes to a stable conformation and binds to the inducible promoter.
EcR
RXR
VP16
Gal4
Basal
Transcription
Proteins
Activator
Ligand
RXR
VP16
Gal4
EcR
Inducible Gene Program
Inducible Gene Program
RheoSwitch Therapeutic System®
(RTS®) is a 3-component transcriptional regulator
Inducible Gene Regulation: RheoSwitch Therapeutic System
®


IL-12 Production is Modulated by Activator Ligand in
HT 1080 Cells
5
On
Off
On
AL=75nM
5


Dose-Dependent Increase in Expression of Tumor IL-12
mRNA & IL-12 Protein in Response to Veledimex
10
2
10
10
4
10
5
10
6
0
2
4
6
8
10
12
14
RTS gDNA
Tumor Veledimex Level
10
0
10
1
10
2
10
3
0
2
4
6
8
10
12
14
Time (days)
Time (days)
Vehicle/Vehicle
Vehicle/Veledimex
150
mg/m
Ad (1e10) + Veledimex 15 mg/m
Ad (1e10) + Veledimex 30 mg/m
Ad (1e10) + Veledimex 75 mg/m
Ad
(1e10)
+
Veledimex
150
mg/m
2
Tumor IL-12 Protein Level
IL-12 RNA
0.1
1
10
0
2
4
6
8
10
12
14
Time (days)
10
0
10
1
10
2
10
3
10
4
0
2
4
6
8
10
12
14
Time (days)
2
2
2
2
3


Ad-RTS-mIL-12 + Veledimex Increases Tumor
CD8
+
& CD4
+
While Decreasing CD4
+
Fox P3
+
TILs
in the 4T1 Syngeneic Mouse
Vehicle
Ad-RTS-mIL-12
1 x 10
10
vp
+ Veledimex
150 mg/m
7
CD8
+
CD4
+
CD4
+
Fox P3
+
2


Dose-Dependent Anti-Tumor Activity of Ad-RTS-
mIL-12 + Veledimex (AL) in Murine 4T1 Model 
Start of treatment
Tumor
volume
reached
100-200
mm
3
0
4
8
12
16
20
24
28
32
0
5
10
15
Vehicle/Vehicle
Vehicle/Ad-RTS-mIL12
Vehicle/Veledimex
15
mg/m
2
Ad-RTS-mIL12
+
AL
15
mg/m
2
Ad-RTS-mIL12
+
AL
30
mg/m
2
Ad-RTS-mIL12
+
AL
75
mg/m
2
Ad-RTS-mIL12
+
AL
150mg/m
2
Time (Days)


High expression of IL-12 mRNA in tumors, tightly controlled by
veledimex dose
Tumor
biopsies
show
increased
tumor
infiltrating
lymphocytes
in
both
injected and systemic non-injected lesions
Serious adverse events are mechanism-based and consistent with
immunotherapy (Fever, N&V, leukopenia, increased LFTs,
hyponatremia, cytokine release response)
•Serious adverse events reversed within days after stopping veledimex
dosing
•Subjects
who
have
had
IL-12
expression
turned
“off”
have
been
redosed, and IL-12 turned “on”
again
Clinical Observations to Date
9
We can control gene expression to achieve a systemic immune
response
We have seen systemic and fully reversible toxicity


Higher Veledimex Levels Normal and in GL261
Orthotopic Glioma Mouse Brains
Veledimex levels at 24 hr posttreatment
0
1000
2000
3000
4000
5000
6000
450 mg/m
2
/day
1200 mg/m
2
/day


Effects of Ad-RTS-mIL-12 + Veledimex (AL)
in the Orthotopic GL261 Mouse
Normal Mouse
Vehicle
BID x 14
Ad-RTS-mIL-12 1x10
10
vp
+
AL
450
mg/m
/day
BID x14
Treatment For 14 days
Day 74 (end of study)
Control Day 20
2


Ad-RTS-mIL-12 + Veledimex (in Chow)
Results in Increased Survival in the GL261
Orthotopic Glioma Mouse Model
Veledimex administered ad lib in chow from Day 4 to EOS at ~ 675 mg/m
/day
Ad-RTS-mIL12 administered on Day 5
0
20
40
60
80
0
20
40
60
80
100
Vehicle/Vehicle
Vehicle/AD (5e9)
Vehicle/Activator chow (1000)
Activator chow + AD (5e9)
Activator chow + AD (1e9)
Activator chow + AD (1e8)
Time (Days)
2


Ad-RTS-mIL-12 + Veledimex (AL) Results in
Increased Survival When Compared to Control
in the GL261 Orthotopic Glioma Mouse Model
Ad-RTS-mIL12
administered
on
Day
5
;
Veledimex
(mg/m
2
)
administered
BID
for
14
days
from
Day 5;
0
20
40
60
80
0
10
20
30
40
50
60
70
80
90
100
maisine/saline
maisine/vector
Veledimex (AL)/saline
AL 150/day + AD 1e10
AL 300/day + AD 1e10
AL 450/day + AD 1e10
AL 675/day + AD 1e10
AL 1200/day + AD 1e10
dexamethasone 6 bidx14
bevacizumab 30 biwkx3
temozolamide 300Qdx5
Time (Days)


Ad-RTS-mIL-12 + veledimex significantly
reduces brain cancer stem cells
in GL-261
Orthotopic Glioma Model
Nestin levels (marker for cancer stem cells)
inverse correlation with survival (Pearson r= 0.92)
0
10
20
30
Vehicle/Vehicle
Vehicle/Ad-RTS-mIL-12
Vehicle/Veledimex
Veledime
x 450 mg/m
/day
Veledime
x 600 mg/m
/day
Veledime
x 1200 mg/m
/day
Nestin
2
2
2


15
Conclusions
Ad-RTS-mIL-12 + veledimex PO exhibits controllable
systemic immune activation in human subjects with
melanoma and breast cancer. 
Veledimex exhibits dose-related increases in plasma and
brain tissue exposure with no accumulation in brain.
Ad-RTS-mIL-12 (1x10
10
vp) + veledimex PO improves
survival over temozolomide, dexamethasone and
bevacizumab.
Ad-RTS-mIL-12 + veledimex significantly reduces brain
cancer stem cells
These findings support the utility of localized, regulatable IL-
12 production as an approach for the treatment of malignant
glioma in human subjects.