Nes‐Ziona, Israel – Vaxil BioTherapeutics, a clinical stage biotechnology
company developing therapeutic vaccines for the treatment of cancer and infectious
diseases, is merging with Sheldonco Ltd (TASE: SLDC), a “shell” company traded on the Tel
Aviv Stock Exchange. The agreement was signed in February and is expected to complete in
the coming months subject to various closing conditions set out in the regulatory filings (see
link in Hebrew). http://maya.tase.co.il/bursa/report.asp?report_cd=726136&CompCd=574.
Vaxil is developing ImMucin, a therapeutic vaccine to treat cancer, which was identified
using the company’s proprietary technology, VaxHit. ImMucin is a peptide vaccine derived
from a unique sequence contained in the MUC1 tumor associated antigen which is present
in 90% of all tumors. ImMucin educates the patient’s immune system to identify and destroy
cancer cells where the MUC1 marker is present.
Vaxil is currently evaluating ImMucin in a Phase I/II clinical trial in Hadassah Medical Center,
Jerusalem in patients with Multiple Myeloma (a hematological cancer). A condition for
enrollment in the study is that patients should be experiencing a gradual re‐emergence of
disease after a period of remission. Up to fifteen patients will be enrolled in the study; to
date ten have been treated. The results of the interim report which are reported in the
recent regulatory filings, relate only to seven patients who had finished the treatment with
The interim results demonstrate that ImMucin has a very high safety profile. No side effects
were observed with the exception of minor local irritation which all resolved themselves
within 24 hours without the need for any additional treatment or medical intervention. In
addition, ImMucin generated a robust and specific immune response (of CD4+ and CD8+ T
cells) in all patients which was observed after only 2‐4 doses of the vaccine our of a
maximum of 12 doses.
In some of the patients, preliminary signs of clinical efficacy were observed, including the
stabilization or decrease of the disease markers, and a decrease in overall disease load as
measured by the percentage of plasma cells in the patient’s bone marrow, one month
following the end of treatment as compared with prior to commencement of treatment. Of the patients analyzed in the interim report, three are in complete response following
Details of the merger agreement with Sheldonco were also released in the regulatory filing.
According to the agreement, Vaxil will be acquired in its entirety by Sheldonco. The
shareholders/option holders of Vaxil will receive 56% of the share capital of Sheldonco (on a
fully diluted basis) and their holding will increase to 74% in Sheldonco (on a fully diluted
basis) subject to achieving various milestones.
Vaxil was founded by Dr. Lior Carmon a biotechnology entrepreneur and expert in
Immunology and cancer immunotherapy. Dr Carmon has a PhD in Immunology from the
Weizmann Institute. Dr. Carmon was joined by Julian Levy who has worked with Lior Carmon
for over a decade in various biotechnology ventures. Vaxil is developing therapeutic vaccines
to treat cancer and a range of infectious diseases by generating an immune response.
As opposed to traditional prophylactic vaccines which protect healthy people from disease, a
therapeutic vaccine deals with sick people and seeks to harness their immune system to
identify and destroy cancer cells in a safe, efficient and focused manner. From the patient’s
perspective a therapeutic vaccine is a drug. ImMucin which was identified using Vaxil’s
proprietary technology, VaxHit, teaches the patient’s immune system to identify and destroy
cells which display the cancer marker MUC1 which appears on over 90% of all cancers.
Consequently, ImMucin has the potential to be used against a wide range of cancers. In
addition, ImMucin has a number of specific characteristics which differentiate it from other
therapeutic vaccines. Firstly, ImMucin can be offered to a very wide section of the
population with no need for complicated and expensive personalization or prior selection
based on the patient’s immune system. Second, ImMucin has the ability that may enable it
to cope with the tendency of the tumor to evade the immune response and develop
resistance to treatment.
In addition to ImMucin, Vaxil is also developing the MTbuVax therapeutic vaccine for TB with
potential for prophylactic use. MTbuVax, which was also identified using VaxHit, is currently
being evaluated in animal studies. Globally, TB is one of the largest causes of mortality.
According to the WHO, in 2009, 9 million people worldwide were diagnosed as carrying the
TB bacteria and 2 million died of it. Although most TB cases are in developing countries, over
the last few years, there has been an increase in incidence rates in the western world due to
the low efficiency of the current TB vaccine (BCG), increased global travel movements, the
mutation of the TB bacteria to new strains which are partially or sometimes even totally
resistant to drug treatment and the strong link of TB with HIV infection.
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