Page 225«..1020..224225226227..230240..»

Category Archives: Stem Cell Therapy

Biotech Biz Alert: California Stem Cell Agency Altering Loan Policies

Posted: May 13, 2012 at 3:59 pm


The California stem cell agency is in
the midst of making significant changes in its lending regulations,
but says it is not part of an effort to transfer a $25 million loan
to Geron to another company.
That does not mean, however, that the agency is not going to
transfer the loan at some point. CIRM says it already has the
authority to do so.
Talk has surfaced from time to time at
CIRM meetings about the likelihood of helping to continue with the
hESC clinical trial that Geron abruptly abandoned last fall. The
surprise termination of Geron's hESC program came only a few months
after CIRM and Geron signed a $25 million loan agreement in August.
Geron is trying to sell off its hESC business, although Geron's hESC
team has already left the company, according to industry reports.
Modification of the CIRM loan
regulations has been underway for some time. Tomorrow the CIRM
directors' Intellectual Property and Industry Subcommittee will consider the latest proposals.
Some of the changes deal with
relinquishment and transfer of loans. The modifications explicitly
give CIRM President Alan Trounson the ability to transfer a loan
without having to go through additional reviews or seek board
approval. Other changes are also designed to clarify and remove
ambiguities in the transfer arrangement, which may well be necessary
in order to make a transfer acceptable to a buyer of the Geron
assets.
Geron paid off the loan last fall but
it is not clear whether that action would preclude a transfer. At one
point earlier this year, Trounson said he was involved in helping to find a buyer, but it is not clear whether any CIRM official is
currently involved. Geron has hired  Stifel
Nicolaus & Co
.
to help peddle
the hESC business.
CIRM's loan changes are complex. The
agency has not yet put together in one place a straightforward
rationale and explanation of all the modifications. Nonetheless,
biotech and stem cell firms should pay close attention to the
proposals. They could mean the difference between the infusion or
loss of millions for a company's research.
The proposals are expected to go before
the full CIRM board later this month. Then they will be subject to
the state's administrative law process, including a period for public
comment.
Tomorrow's meeting has public
teleconference locations in San Francisco, Los Angeles, La Jolla and
two in Irvine. Specific addresses can be found on the agenda.

Source:
http://californiastemcellreport.blogspot.com/feeds/posts/default?alt=rss

Posted in Stem Cells, Stem Cell Therapy | Comments Off on Biotech Biz Alert: California Stem Cell Agency Altering Loan Policies

Advisor to CIRM Nominated to Board of CIRM Grant Recipient Expecting $5 Million from Agency

Posted: May 13, 2012 at 3:59 pm


A "special
advisor" to the $3 billion California stem cell agency has been nominated to the board of directors of Sangamo BioSciences, Inc., a
firm that is sharing in a $14.5 million grant from the state research
enterprise.
She is Saira Ramasastry, managing partner of Life Sciences Advisory, LLC, of
Emerald Lake Hills, Ca., and who also has worked as a consultant to
Sangamo. Ramasastry's ties to CIRM go back to at least May of 2010,
when she served as a consultant for the panel that CIRM hired to
review its operations. The panel strongly recommended that CIRM
engage industry more warmly. Since then Ramasastry's contracts with
CIRM have totalled $65,000. Her current $25,000 contract describes
her work for CIRM as "industry analysis and consultation."
Ramasastry's
website says she serves as "a special advisor to CIRM in
industry engagement initiatives and strategic projects." Her
firm also offers expertise to life sciences firms in "strategic
alternatives advisory, strategic options analysis, tailored business
development solutions and innovative financing strategies."
In a news release April 30 announcing her nomination, Sangamo said Ramasastry has worked as a consultant to the Richmond, Ca., company. William Ringo, chairman of Sangamo's board of
directors, said,

 "Saira's
extensive experience in global healthcare investment banking and
strategic advisory consulting will bring valuable financial,
commercial assessment and business development skills to our board."

Compensation for Sangamo directors in 2011 ranged from $75,000 to $35,000 for those who served a full year plus stock options. 

Sangamo is sharing
in a $14.5 million, four-year grant from CIRM with the City of Hope
in Los Angeles dealing with an AIDS- related lymphoma therapy. The
grant was approved in 2009. Sangamo expects to receive $5.2 million from the grant if it runs for the full four years. As of the end of 2011, the firm has received $2.4 million, according to its financial documents. In March, Ellen Feigal, CIRM senior vice
president for research and development, said the effort is due for an
evaluation late this year.  Earlier this year, CIRM terminated one $19 million grant in the same round after it failed to meet milestones.

Sangamo's board is
scheduled to vote on Ramasastry's nomination on June 21. 
The California
Stem Cell Report
has asked Ramasastry if she has any comment for
publication. We are also querying CIRM and Sangamo. Their comments
will be carried verbatim when we receive them.
Our take?
Ramasastry's consulting work with both CIRM and Sangamo demonstrates
again the tiny size of the world of stem cell science. It also raises
questions about conflicts of interest involving CIRM and industry. Can
a consultant in such a position serve two masters and serve them both
equally well? CIRM's interests are not necessarily the same as
Sangamo's, which is a publicly traded firm working diligently to
generate profit and financial returns for its shareholders. To do
that, it needs capital from its financial "backers,"
including CIRM. The stem cell agency, however, is in the business of
getting the results that it wants from Sangamo. If not, the grant
can be cancelled. Working for both the stem cell agency, whose
paramount obligation is to the people of California, and a recipient
of the agency's millions is incompatible.

Source:
http://californiastemcellreport.blogspot.com/feeds/posts/default?alt=rss

Posted in Stem Cells, Stem Cell Therapy | Comments Off on Advisor to CIRM Nominated to Board of CIRM Grant Recipient Expecting $5 Million from Agency

StemCells, Inc., Hoping for as Much as $40 Million from California Stem Cell Agency

Posted: May 13, 2012 at 3:58 pm


StemCells, Inc., said today it has
applied for as much as $40 million in funding from the California
stem cell agency for two projects dealing with Alzheimer's disease
and cervical spinal cord injury.
The announcement came in a news release
dealing with the publicly traded firm's quarterly earnings. The applications are part of a $240 million round expected to be acted on in late July by the board
of the $3 billion California stem cell agency. Funding for
businesses in the disease team round is expected to come through a
loan.
StemCells, Inc., of Newark, Ca., said,

"In January 2012, we submitted two
applications to the California Institute of Regenerative Medicine
(CIRM)
for 'Disease Team Therapy Development Research Awards,' one
for Alzheimer's disease and one for cervical spinal cord injury. A
research award may be up to $20 million, payable over four years, to
fund preclinical and IND-enabling activities with the aim of starting
human clinical trials within a four-year window."

Applications in the round were reviewed
behind closed doors in April. CIRM also has a policy of not releasing the
names of applicants until its board acts and then only if an
applicant is approved. CIRM says it does not want to embarrass firms
that do not win approval. That includes individual researcher names
as well as the names of such institutions as the University of
California
.
During discussion of grant applications by the CIRM board, directors are not told the names of the applicants,
just the number of the application. If board members have conflicts
of interest on specific applications, they are barred from voting on
and discussing the application. The names of applicants have
occassionally slipped out. Sometimes their identities can also be
discerned by information contained in the summaries of the reviews of
the applications, which become available on the CIRM web site shortly before the directors act. The summaries normally carry scientific scores and recommendations for funding.
Most companies seeking funding from
CIRM do not identify themselves in advance, although they do if they
appeal a negative decision by reviewers. The board has ultimate
authority for approval of grants but has almost never rejected a
recommendation for funding by reviewers.
StemCells Inc. was founded by Irv Weissman of Stanford, who sits on its board of directors. Weissman is also on its scientific advisory board along with Fred Gage
of Salk and David Anderson of Caltech. Weissman and Gage have won
substantial grants from CIRM. 
StemCells Inc.'s stock price closed at
92 cents yesterday. Its 52-week high was $8.20, and its 52 week low
was 70 cents.
Here is a link to an analyst's report
on the company.

(Editor's note: An earlier version of this item incorrectly stated that the disease team round will be acted on later this month.)

Source:
http://californiastemcellreport.blogspot.com/feeds/posts/default?alt=rss

Posted in Stem Cells, Stem Cell Therapy | Comments Off on StemCells, Inc., Hoping for as Much as $40 Million from California Stem Cell Agency

Biotech Biz Alert: California Stem Cell Agency Altering Loan Policies

Posted: May 13, 2012 at 3:58 pm


The California stem cell agency is in
the midst of making significant changes in its lending regulations,
but says it is not part of an effort to transfer a $25 million loan
to Geron to another company.
That does not mean, however, that the agency is not going to
transfer the loan at some point. CIRM says it already has the
authority to do so.
Talk has surfaced from time to time at
CIRM meetings about the likelihood of helping to continue with the
hESC clinical trial that Geron abruptly abandoned last fall. The
surprise termination of Geron's hESC program came only a few months
after CIRM and Geron signed a $25 million loan agreement in August.
Geron is trying to sell off its hESC business, although Geron's hESC
team has already left the company, according to industry reports.
Modification of the CIRM loan
regulations has been underway for some time. Tomorrow the CIRM
directors' Intellectual Property and Industry Subcommittee will consider the latest proposals.
Some of the changes deal with
relinquishment and transfer of loans. The modifications explicitly
give CIRM President Alan Trounson the ability to transfer a loan
without having to go through additional reviews or seek board
approval. Other changes are also designed to clarify and remove
ambiguities in the transfer arrangement, which may well be necessary
in order to make a transfer acceptable to a buyer of the Geron
assets.
Geron paid off the loan last fall but
it is not clear whether that action would preclude a transfer. At one
point earlier this year, Trounson said he was involved in helping to find a buyer, but it is not clear whether any CIRM official is
currently involved. Geron has hired  Stifel
Nicolaus & Co
.
to help peddle
the hESC business.
CIRM's loan changes are complex. The
agency has not yet put together in one place a straightforward
rationale and explanation of all the modifications. Nonetheless,
biotech and stem cell firms should pay close attention to the
proposals. They could mean the difference between the infusion or
loss of millions for a company's research.
The proposals are expected to go before
the full CIRM board later this month. Then they will be subject to
the state's administrative law process, including a period for public
comment.
Tomorrow's meeting has public
teleconference locations in San Francisco, Los Angeles, La Jolla and
two in Irvine. Specific addresses can be found on the agenda.

Source:
http://californiastemcellreport.blogspot.com/feeds/posts/default?alt=rss

Posted in Stem Cells, Stem Cell Therapy | Comments Off on Biotech Biz Alert: California Stem Cell Agency Altering Loan Policies

Advisor to CIRM Nominated to Board of CIRM Grant Recipient Expecting $5 Million from Agency

Posted: May 13, 2012 at 3:58 pm


A "special
advisor" to the $3 billion California stem cell agency has been nominated to the board of directors of Sangamo BioSciences, Inc., a
firm that is sharing in a $14.5 million grant from the state research
enterprise.
She is Saira Ramasastry, managing partner of Life Sciences Advisory, LLC, of
Emerald Lake Hills, Ca., and who also has worked as a consultant to
Sangamo. Ramasastry's ties to CIRM go back to at least May of 2010,
when she served as a consultant for the panel that CIRM hired to
review its operations. The panel strongly recommended that CIRM
engage industry more warmly. Since then Ramasastry's contracts with
CIRM have totalled $65,000. Her current $25,000 contract describes
her work for CIRM as "industry analysis and consultation."
Ramasastry's
website says she serves as "a special advisor to CIRM in
industry engagement initiatives and strategic projects." Her
firm also offers expertise to life sciences firms in "strategic
alternatives advisory, strategic options analysis, tailored business
development solutions and innovative financing strategies."
In a news release April 30 announcing her nomination, Sangamo said Ramasastry has worked as a consultant to the Richmond, Ca., company. William Ringo, chairman of Sangamo's board of
directors, said,

 "Saira's
extensive experience in global healthcare investment banking and
strategic advisory consulting will bring valuable financial,
commercial assessment and business development skills to our board."

Compensation for Sangamo directors in 2011 ranged from $75,000 to $35,000 for those who served a full year plus stock options. 

Sangamo is sharing
in a $14.5 million, four-year grant from CIRM with the City of Hope
in Los Angeles dealing with an AIDS- related lymphoma therapy. The
grant was approved in 2009. Sangamo expects to receive $5.2 million from the grant if it runs for the full four years. As of the end of 2011, the firm has received $2.4 million, according to its financial documents. In March, Ellen Feigal, CIRM senior vice
president for research and development, said the effort is due for an
evaluation late this year.  Earlier this year, CIRM terminated one $19 million grant in the same round after it failed to meet milestones.

Sangamo's board is
scheduled to vote on Ramasastry's nomination on June 21. 
The California
Stem Cell Report
has asked Ramasastry if she has any comment for
publication. We are also querying CIRM and Sangamo. Their comments
will be carried verbatim when we receive them.
Our take?
Ramasastry's consulting work with both CIRM and Sangamo demonstrates
again the tiny size of the world of stem cell science. It also raises
questions about conflicts of interest involving CIRM and industry. Can
a consultant in such a position serve two masters and serve them both
equally well? CIRM's interests are not necessarily the same as
Sangamo's, which is a publicly traded firm working diligently to
generate profit and financial returns for its shareholders. To do
that, it needs capital from its financial "backers,"
including CIRM. The stem cell agency, however, is in the business of
getting the results that it wants from Sangamo. If not, the grant
can be cancelled. Working for both the stem cell agency, whose
paramount obligation is to the people of California, and a recipient
of the agency's millions is incompatible.

Source:
http://californiastemcellreport.blogspot.com/feeds/posts/default?alt=rss

Posted in Stem Cells, Stem Cell Therapy | Comments Off on Advisor to CIRM Nominated to Board of CIRM Grant Recipient Expecting $5 Million from Agency

Joseph Estrada defies age, shares how he did it: Stem cell therapy

Posted: May 13, 2012 at 5:14 am

By Cathy C. Yamsuan Philippine Daily Inquirer

Former President Joseph Erap Estrada had always maintained that giving generously to friends and forgiving opponents are the secrets to staying young.

But time has a way of catching up with even the most formidable leading men.

Since he entered national politics 25 years ago, Estrada has struggled with the attributes of old ageweight gain, a painful knee here, a cataract there.

He needed some kind of elixir of youth to put to right what nature has put asunder. And to get back on his feet in time to serve the people, he said which has no age limit.

So he did it, and is very open about it. What is it?

At the prodding of friends, the 75-year-old Estrada flew to Frankfurt, Germany, last month to undergo fresh cell therapy (also known as stem cell treatment), an innovative albeit controversial procedure where fresh cells from donor animals are injected into the human body to treat diseases or reverse the aging process.

Fresh cell therapy operates under the principle of like heals like.

The fresh cells from a donor animals organ are infused into the human counterpart.

Substances in the donors blood are supposed to reactivate the human bodys immune system and defense mechanism, a reaction that would eventually rebuild and revitalize aging tissues.

Read the original post:
Joseph Estrada defies age, shares how he did it: Stem cell therapy

Posted in Stem Cell Therapy | Comments Off on Joseph Estrada defies age, shares how he did it: Stem cell therapy

Using Stem Cell Therapy For Neck And Head Cancers Avoids Salivary Gland Damage Caused By Radiotherapy

Posted: May 13, 2012 at 5:14 am

Editor's Choice Main Category: Ear, Nose and Throat Also Included In: Radiology / Nuclear Medicine;Cancer / Oncology;Stem Cell Research Article Date: 11 May 2012 - 10:00 PDT

Current Article Ratings:

The researchers note this finding could enhance the quality of life of 500,000 individuals with head and neck cancer each year worldwide.

The team found that the stem cells needed for regenerating the parotid gland (the largest pair of salivary glands) were primarily located in the major ducts of the gland. According to the researchers, these cells could be easily avoided during radiotherapy or given a minimal radiation dose.

Dr. Peter van Luijk, a research associate at the University Medical Center Groningen, The Netherlands, explained:

Findings from the study were presented at the 31st conference of the European Society for Radiotherapy and Oncology (ESTRO31).

Dry mouth syndrome is a condition in which there is not enough saliva in the mouth. The condition can occur when the parotid gland stops functioning properly after radiation damage.

Symptoms of dry mouth syndrome include difficulty sleeping, eating, tooth decay or loss, and bad breath. These symptoms lead to poorer quality of life and difficulty working, as well as social isolation.

The majority of treatments to treat the condition and its consequences are insufficient and can cost hundreds or even thousands of Euros per patient each year.

Dr. van Luijk said:

Link:
Using Stem Cell Therapy For Neck And Head Cancers Avoids Salivary Gland Damage Caused By Radiotherapy

Posted in Stem Cell Therapy | Comments Off on Using Stem Cell Therapy For Neck And Head Cancers Avoids Salivary Gland Damage Caused By Radiotherapy

Stem Cell Study Shows Promising Results Against Heart Failure

Posted: May 13, 2012 at 5:14 am

By Denise Mann HealthDay Reporter

THURSDAY, May 10 (HealthDay News) -- A new treatment that involves spinning bone marrow stem cells to enhance their healing potential may help people with advanced heart failure feel and function better, a small study suggests.

Researchers developed the treatment by culturing a patient's own bone marrow for 12 days. This process helped increase the amount of immune cells and stem cells that can differentiate into several different cell types, including heart cells. Those cells were then injected into heart muscle. The study was funded by treatment manufacturer Aastrom Biosciences.

According to the findings, this treatment was safe, helped repair the damaged heart muscle and reversed some heart failure symptoms, when compared to a placebo injection. The findings were to be presented Thursday at the Society for Cardiovascular Angiography and Interventions annual meeting, in Las Vegas.

The U.S. National Heart, Lung, and Blood Institute reports that about 5.8 million people in the United States have heart failure, a condition that occurs when the heart can no longer pump enough blood to meet the body's needs. Symptoms include shortness of breath, fatigue and swelling in the ankles, feet, legs and abdomen. There is no cure; treatment typically includes a cocktail of medications aimed at reducing symptoms and improving quality of life.

"A number of people with heart failure have slowly progressing disease despite medication and/or device therapy. If we could have a therapy for this group that would slow the progression of heart failure, it would be economic and change the disease process tremendously," said study author Dr. Timothy Henry, director of research and an interventional cardiologist at the Minneapolis Heart Institute at Abbott Northwestern Hospital in Minneapolis. The treatment would not be used for people who need a heart transplant.

Calling it the next generation of stem cell therapy, Henry said the treatment process helps enhance the potency of existing stem cells. "It gives a more functional product," and when injected these stem cells may promote the growth of new blood vessels, he added.

Further study is ongoing, and if the results are positive a product could be available within two years to treat inadequate blood supply to the legs, and soon thereafter for heart failure, he said. According to Henry, six or seven new products that enhance bone marrow stem cells are being developed. "Ask your doctor if you are a candidate for any of the clinical trials," Henry advised.

The new study included 22 participants with advanced heart failure and an enlarged heart whose current medication regimen was no longer effective. They either received an injection of the stem cell therapy treatment into their heart muscles or a placebo shot. After 12 months, there were no complications and no difference in side effects among those who received the stem cells and the control group. That said, individuals who received the novel stem cell therapy did have a lower number of major heart-related events and were more likely to see improvements in their ability to walk without growing breathless. Those who received the stem cell treatment also showed marked improvements in their ejection fraction, which is a measure of how much blood leaves the heart with each pump.

"This study tells us that injecting stem cells into the heart muscle of a patient with chronic heart failure may be beneficial," says Dr. Sandeep Jauhar, director of the congestive heart failure program at Long Island Jewish Medical Center in New Hyde Park, N.Y. Typically, these individuals are treated with multiple medications, put on a low-salt diet and encouraged to get some exercise.

More:
Stem Cell Study Shows Promising Results Against Heart Failure

Posted in Stem Cell Therapy | Comments Off on Stem Cell Study Shows Promising Results Against Heart Failure

Founder of National Children's Leukemia Unveiled Non-Embryonic Stem Cell Treatment Promising Cure for Cancer at GIL …

Posted: May 9, 2012 at 8:15 pm

LONDON, May 9,2012 /PRNewswire/ -- A monumental discovery that provides the promise of a cure not only for leukaemia, but cancer at large was announced this morning in London during GIL 2012: Europe. Steve Shor, the founder of the National Children's Leukemia Foundation, a leading non-profit organisation in the United States, unveiled a ground-breaking therapy his research teams in the United States and Israel have discovered. Mr. Shor and National Program Director, Dr. Sara Gardin, presented this new non-embryonic stem cell treatment for cancer and leukaemia, referred to as the "Stem cell cocktail" which delivers a combination of therapies including core stem cells and various compounds to tackle cell metastasization.

Just a few weeks ago, this unique approach to tackling one of the most prominent forms of cancer of our time received initial patent approval with full patents expected in the coming months.

Steve Shor delivered an emotional appeal and address that captured the undivided attention of some two hundred plus senior level business executives representing this global network of visionaries, innovators and leaders gathered in London for Frost & Sullivan's GIL 2012: Europe - Journey to Visionary Innovation. Mr. Shor, a construction business owner from Brooklyn, New York, who had given up his successful career in 1992 to search out a bone marrow donor, when he discovered that his 17-year old son had been diagnosed with leukaemia. His son unfortunately never received a bone marrow transplant and lost his fight with leukaemia. Steve has continued to dedicate his life to cancer research founding the National Children's Leukemia Foundation and working with scientists in hopes to find "The Cure."

"I always thought the cure for cancer had to come from core stem cells," Steve said. "We started from a very different point. We asked: what are the mechanisms that make cancer cells grow?"

First time trial left them sceptical but upon continuous trials with positive outcomes, the team at the NCLF research institute in Israel knew they have uncovered a ground breaking monumental discovery with not only finding promise in a cure and treatment for leukaemia, but all cancers as well.

"A cure not only for leukaemia but cancer at large is within reach. We will see a cure for cancer within our generation," concluded Mr. Shor.

Steve Shor was recognised for his visionary leadership in finding a cure for leukaemia by the Frost & Sullivan community of visionaries, innovators and leaders - GIL Global with the presentation of Frost & Sullivan's 2012 Growth, Innovation and Leadership Lifetime Achievement Award by Vice President & Global Head of GIL, Brian Denker.

"One year ago, I stood here in London and posed a question to our GIL Europe delegation -- What is a world without cancer? Today, a year later, I return back to this side of the Atlantic with a promise of hope by way of an individual who has successfully found visionary innovation in his own journey in the wake of tragedy and struggle." Denker concluded by asking each member of the GIL Global community to go forward, continually revisiting three profound questions we all must continue to ask ourselves. Firstly, what does it mean to truly innovate; second, what does it mean to inspire; and lastly, how can we ourselves bridge innovation and inspiration?

To interview Mr. Denker and Mr. Shor and to know more about Frost & Sullivan's journey to visionary innovation, please contact Chiara Carella, Corporate Communications, at chiara.carella@frost.com.

About Frost & Sullivan

See the rest here:
Founder of National Children's Leukemia Unveiled Non-Embryonic Stem Cell Treatment Promising Cure for Cancer at GIL ...

Posted in Stem Cell Therapy | Comments Off on Founder of National Children's Leukemia Unveiled Non-Embryonic Stem Cell Treatment Promising Cure for Cancer at GIL …

Gene-modified stem cell transplant protects patients from toxic side effects of chemotherapy

Posted: May 9, 2012 at 8:15 pm

Public release date: 9-May-2012 [ | E-mail | Share ]

Contact: Dean Forbes dforbes@fhcrc.org 206-667-2896 Fred Hutchinson Cancer Research Center

SEATTLE For the first time, scientists at Fred Hutchinson Cancer Research Center have transplanted brain cancer patients' own gene-modified blood stem cells in order to protect their bone marrow against the toxic side effects of chemotherapy. Initial results of the ongoing, small clinical trial of three patients with glioblastoma showed that two patients survived longer than predicted if they had not been given the transplants, and a third patient remains alive with no disease progression almost three years after treatment.

"We found that patients were able to tolerate the chemotherapy better and without negative side effects after transplantation of the gene-modified stem cells than patients in previous studies who received the same type of chemotherapy without a transplant of gene-modified stem cells," said Hans-Peter Kiem, M.D., senior and corresponding author of the study published in the May 9 issue of Science Translational Medicine.

Kiem, a member of the Clinical Research Division at the Hutchinson Center, said that a major barrier to effective use of chemotherapy to treat cancers like glioblastoma has been the toxicity of chemotherapy drugs to other organs, primarily bone marrow. This results in decreased blood cell counts, increased susceptibility to infections and other side effects. Discontinuing or delaying treatment or reducing the chemotherapy dose is generally required, but that often results in less effective treatment.

In the current study, Kiem and colleagues focused on patients with glioblastoma, an invariably fatal cancer. Many of these patients have a gene called MGMT (O6-methylguanine-DNA-methyltransferase) that is turned on because the promoter for this gene is unmethylated. MGMT is a DNA repair enzyme that counteracts the toxic effect of some chemotherapy agents like temozolomide. Patients with such an unmethylated promoter status have a particularly poor prognosis.

A drug called benzylguanine can block the MGMT gene and make tumor cells sensitive to chemotherapy again, but when given with chemotherapy, the toxic effects of this combination are too much for bone marrow cells, which results in marrow suppression.

By giving bone marrow stem cells P140K, which is a modified version of MGMT, those cells are protected from the toxic effects of benzylguanine and chemotherapy, while the tumor cells are still sensitive to chemotherapy. "P140K can repair the damage caused by chemotherapy and is impervious to the effects of benzylguanine," Kiem said.

"This therapy is analogous to firing at both tumor cells and bone marrow cells, but giving the bone marrow cells protective shields while the tumor cells are unshielded," said Jennifer Adair, Ph.D., who shares first authorship of the study with Brian Beard, Ph.D., both members of Kiem's lab.

The three patients in this study survived an average of 22 months after receiving transplants of their own circulating blood stem cells. One, an Alaskan man, remains alive 34 months after treatment. Median survival for patients with this type of high-risk glioblastoma without a transplant is just over a year.

See original here:
Gene-modified stem cell transplant protects patients from toxic side effects of chemotherapy

Posted in Stem Cell Therapy | Comments Off on Gene-modified stem cell transplant protects patients from toxic side effects of chemotherapy

Page 225«..1020..224225226227..230240..»