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41.704.331 von Reiki-Meister am 27.06.11
13:11:44Good news:
June 27, 2011
Sangamo BioSciences Announces Publication of First Demonstration of
In Vivo Correction of Hemophilia Gene via Systemic Delivery of a
ZFP Therapeutic®
Groundbreaking Nature Publication Demonstrates Direct In Vivo
Correction of a Defective Gene and Highlights Potential Use of ZFN
Technology for Treatment of Hemophilia and Other Monogenic and Rare
Diseases
RICHMOND, Calif., June 27, 2011 /PRNewswire/ -- Sangamo
BioSciences, Inc. (Nasdaq: SGMO) announced today the publication of
a groundbreaking preclinical study demonstrating permanent
functional correction of the gene that causes hemophilia B by the
systemic delivery of zinc finger nucleases (ZFNs) . The study,
published in Nature, represents a significant advance in the
development and systemic delivery of ZFP Therapeutics® and proof of
concept for ZFN-based gene-editing for the treatment of hemophilia
and other monogenic diseases.
The work was carried out in the laboratory of Katherine High, M.D.,
Investigator, Howard Hughes Medical Institute, Professor of
Pediatrics, University of Pennsylvania School of Medicine and
Director, Center for Cellular and Molecular Therapeutics at The
Children's Hospital of Philadelphia, in collaboration with Sangamo
scientists and was published as an Advance Online Publication in
Nature http://dx.doi.org/10.1038/nature10177.
"These data represent a significant advance in realizing efficient,
systemic, therapeutic gene repair - the 'holy grail' of genetic
medicine," said Dr. High, "With a single systemic administration of
ZFNs and a donor sequence in a mouse model of hemophilia B, we
demonstrated permanent correction of a defective human gene
encoding the clotting factor, Factor IX, resulting in restoration
of normal clotting times in the animal. ZFN-mediated gene-editing
provides a new approach to monogenic disease and circumvents the
problems of traditional gene-addition strategies that result in
random insertion that may lead to malignancy or other unintended
consequences. Genome editing also reinstates the wild-type sequence
under the control of the endogenous regulatory sequences, assuring
restoration of this critical aspect of normal gene expression. The
study also demonstrated that permanent correction of the
disease-related gene in situ can be achieved with therapeutically
meaningful correction efficiencies."
"This is an important step forward in our goal to broaden the
application of ZFN gene-editing via in vivo administration," stated
Edward Lanphier, Sangamo's president and chief executive officer.
"These data highlight the therapeutic potential of our ZFN
technology and enable us to expand our ZFP Therapeutic pipeline to
a growing number of monogenic and rare diseases."
The paper entitled "In vivo Genome Editing Restores Hemostasis in a
Mouse Model of Hemophilia" described highly specific and efficient
ZFN-mediated correction of a defective human Factor IX gene in a
mouse model of hemophilia B by the delivery of ZFNs directly into
animals. Stable levels of Factor IX protein made from the corrected
human gene were measured in the plasma of the treated animals and
resulted in the restoration of normal rates of blood clotting for
the eight-month duration of the study. Moreover, the treatment was
well tolerated as there were no deleterious effects on growth or
liver function in the animals.
About Sangamo
Sangamo BioSciences, Inc. is focused on research and development of
novel DNA-binding proteins for therapeutic gene regulation and
modification. The most advanced ZFP Therapeutic® development
program is currently in a Phase 2b clinical trial for evaluation of
safety and clinical effect in patients with diabetic neuropathy.
Sangamo also has a Phase 1 / 2 clinical trial and two ongoing Phase
1 clinical trials to evaluate the safety and efficacy for the
treatment of HIV/AIDS as well as a Phase 1 trial for the treatment
for recurrent glioblastoma multiforme. Other therapeutic programs
are focused on Parkinson's disease, monogenic diseases, neuropathic
pain and nerve regeneration. Sangamo's core competencies enable the
engineering of a class of DNA-binding proteins known as zinc finger
DNA-binding proteins (ZFPs). By engineering ZFPs that recognize a
specific DNA sequence Sangamo has created ZFP transcription factors
(ZFP TFs) that can control gene expression and, consequently, cell
function. Sangamo is also developing sequence-specific ZFP
Nucleases (ZFNs) for gene modification. Sangamo has established
strategic partnerships with companies in non-therapeutic
applications of its technology including Dow AgroSciences and
Sigma-Aldrich Corporation. For more information about Sangamo,
visit the company's website at www.sangamo.com.
ZFP Therapeutic® is a registered trademark of Sangamo BioSciences,
Inc.
This press release may contain forward-looking statements based on
Sangamo's current expectations. These forward-looking statements
include, without limitation, the potential of ZFNs to treat human
monogenic diseases such as hemophilia and other rare diseases,
research and development of novel ZFP TFs and ZFNs and therapeutic
applications of Sangamo's ZFP technology platform. Actual results
may differ materially from these forward-looking statements due to
a number of factors, including uncertainties relating to the
initiation and completion of stages of our clinical trials, whether
the clinical trials will validate and support the tolerability and
efficacy of ZFNs, technological challenges, Sangamo's ability to
develop commercially viable products and technological developments
by our competitors. For a more detailed discussion of these and
other risks, please see Sangamo's SEC filings, including the risk
factors described in its Annual Report on Form 10-K and its most
recent Quarterly Report on Form 10-Q. Sangamo assumes no obligation
to update the forward-looking information contained in this press
release.
SOURCE Sangamo BioSciences, Inc.