From recent Annual meeting PR
1. Corporate Goals. Vion's corporate goals are to be in Phase III
clinical trials with Triapine(R) and/or VNP40101M in 2004, based on
evidence from Phase II trials commencing in 2002 and 2003, and to
improve tumor colonization in its TAPET(R) program to advance the
technology in clinical trials.
2. Triapine(R). Triapine(R) is a potent inhibitor of a key step in DNA
synthesis and repair. The compound has been well tolerated and has
demonstrated anticancer effects in Phase I trials.
Additional Phase II Single Agent Trials in Solid Tumors Planned. The
Company plans to begin additional Phase II studies of Triapine(R) as
a single agent in head and neck and prostate cancer in 2002.
Combination Studies in Solid Tumors Move Ahead. The Company reported
pre-clinical studies that demonstrated that Triapine(R) enhances
cellular uptake and incorporation into DNA of gemcitabine. In Phase
I trials of Triapine(R) in combination with gemcitabine or other
anticancer agents, good tolerability and partial responses have been
observed. The Company expects to begin a Phase II randomized trial
of Triapine(R) in combination with gemcitabine in non-small cell
lung cancer in the first quarter of 2003. A Phase II trial of
Triapine(R) in combination with gemcitabine in pancreatic cancer is
also expected to commence in the first quarter of 2003.
Leukemia Trial Planned. Phase I single agent trials in leukemia are
expected to be complete by late summer. As a single agent in the
treatment of refractory leukemia, Triapine(R) caused reduction of
leukemia cell counts in most patients. Dose escalation in these
trials continues. The Company expects to begin a Phase I/II trial of
Triapine(R) in combination with gemtuzamab in relapsed acute myeloid
leukemia in the first quarter of 2003.
3. Sulfonyl Hydrazine Prodrugs (SHP). The SHP family is a group of
anticancer agents with alkylating (DNA-damaging) activity. The first
candidate chosen for clinical trials, VNP40101M, also inhibits an
enzyme that repairs the damage it causes to the DNA, thus enhancing
cancer cell death. VNP40101M also showed broad anti-tumor activity in
pre-clinical studies and was able to cross the blood brain barrier,
which prevents the entry of many anticancer agents into the brain.
Clinical Progress. A Phase I trial of VNP40101M administered once
monthly is ongoing. Dose escalation has continued through 10 dose
levels, with minimal to no toxicity seen. A Phase I trial of weekly
administration, the schedule predicted to have greatest activity
based on pre-clinical studies, will begin in the fourth quarter of
2002.
Phase II Trials in Solid Tumors Planned. The Company expects to
begin two Phase II studies in patients with aggressive brain tumors,
the first beginning in the fourth quarter of 2002 and the second in
the first half of 2003. Additional Phase II studies are also planned
to begin in the first half of 2003.
Leukemia Trial Planned. A Phase I trial in acute leukemia is
expected to begin in the third quarter of 2002.
4. TAPET(R). TAPET(R) is a genetically modified Salmonella vector that
has demonstrated preferential accumulation in tumors in pre-clinical
studies when administered intravenously, and is therefore a promising
vector for delivery of continuous and high concentrations of
anticancer proteins directly into tumors. VNP20009 is Vion's first
generation TAPET(R) vector.
Report on Phase I Intravenous Administration Trials. The Company
reported that in three clinical trials of VNP20009 delivered
intravenously over 30 minutes or 4 hours, 49 patients were treated,
and biopsies were taken from tumors of 18 patients who received the
three highest dose levels administered in the trials. Of these
18 biopsies, 17 could be evaluated and bacteria were detected in
5 out of 17 or 29%. An acceptable level of bacterial colonization of
the tumor was achieved in 2 out of 17 or 12%.
Clinical Conclusions to Date. VNP20009 has been shown to colonize
tumors in humans when delivered by direct injection into tumor, but
when delivered by intravenous injection, acceptable bacterial levels
in tumors have not been achieved in most patients. Bacteria were
cleared very rapidly from the human body, and thus the Company
believes that a clinical trial in which VNP20009 is delivered
intravenously in conjunction with modulation of the immune system is
the next step in the TAPET(R) clinical development plan.
Phase I Immune Modulation Trial Planned. The objective of this
clinical trial, planned to begin in the third quarter of 2002, is to
improve VNP20009's colonization of human tumors by inhibition of
T-cells, which may be responsible for clearing of the bacteria
before adequate colonization of the tumor. Inhibition of T-cells
will be accomplished by dosing the patient with a short course of
cyclosporine and methotrexate at the time of infusion. Inhibition of
T-cells was shown to lower the threshold dose for tumor colonization
in mouse models.
Second Generation TAPET(R) Vectors. The Company announced that
several second generation TAPET vectors are under evaluation, with
characteristics that should drive improved colonization of human
tumors.
5. Financial Update. The Company plans to continue to pursue corporate
development partners for its compounds and will seek additional
financing in 2003 to pursue advancement into Phase III trials. The
Company reported $19 million in cash, cash equivalents and
investments as of March 31, 2002 and expects that cash expenditures
for the nine-month period beginning April 1 and ending December 31,
2002 will total $10 million. Savings for the second half of 2002 from
the recent expense reduction are expected to total $3.5 million.
Vion Pharmaceuticals, Inc. is a biotechnology company developing novel agents for the treatment of cancer. Vion's portfolio of agents includes Triapine(R), a potent inhibitor of a key step in DNA synthesis and repair, currently in Phase I combination studies and Phase II single agent trials; VNP40101M, a unique DNA alkylating agent currently in Phase I clinical trials; and TAPET(R), a modified Salmonella vector used to deliver anticancer agents directly to tumors. For additional information on Vion and its research and product development programs, visit the company's Internet web site at vionpharm.com. |
