Stem Cells and Breast Surgery
New Procedure Uses Fat to Augment Women,
but Some Are Wary of Effects
By RHONDA L. RUNDLE
August 19, 2008; Page A12
Yokohama, Japan
Researchers around the world are seeking ways to regenerate damaged
hearts, spines and skin with stem cells. At an operating table here
recently, Kotaro Yoshimura leaned over a 51-year-old woman and put
stem cells to use for a different purpose: cosmetic breast surgery.
Dr. Yoshimura jabbed the underside of the woman's left breast with a
thick, long needle, drawing it in and out. At his side, an assistant
slowly cranked the handle of a canister filled with an orange-colored
mixture, pumping it into the needle through a tube. The substance was
a fat concoction from the woman's own body -- which had been
processed in an adjoining laboratory to fortify the stem cells it
contained. Then it was injected into the patient to enlarge her
breasts.
The combination of fat and stem cells -- used to either make breasts
larger or repair them after cancer surgery -- has become one of the
hottest, and most controversial, corners of cosmetic medicine. Breast
surgeries that rely on a person's own fat are being performed in
Japan and Europe and are hurtling toward the U.S., where some
surgeons are already experimenting.
The "genie is out of the bottle," says Grant Carlson, a plastic
surgeon and surgical oncologist at Emory University in Atlanta. He
worries that commercialization of the procedure is moving too fast,
before data are collected about long-term consequences.
This is uncharted territory for the U.S. Food and Drug
Administration, which regulates products and devices but not
procedures. However, the FDA says fat augmented with stem cells
creates a "biologic product" that would require regulatory approval.
The surgery relies on an old idea: the use of human fat to make a
woman's breasts larger. Attempts to use fat transplantations in such
a way date back more than a century, but they usually failed because
most of the fat grafted onto the breast died, turning into hard lumps
or calcifications. The concept has long been frowned upon in the
U.S., although fat transfer has been used with limited success in
other parts of the body.
Now, surgeons are returning to the idea, spurred by the discovery
over a decade ago that fat contains a rich supply of cells similar to
the stem cells found in bone marrow.
Using Fat as a Cosmetic Tool
A stem cell is a cell from which other types of cells develop. The
theory behind the new procedures is that fat may be processed or
handled in a way that allows fragile stem cells to create a blood
supply for the transplant that helps the fat survive. During a single
operation, fat is siphoned from a woman's thigh or abdomen and then
processed using various techniques. The fat is injected back into the
breasts. Because the patient is the donor, there is no risk of tissue
rejection.
Harvesting stem cells from fat doesn't present the ethical issues
that arise when stem cells are retrieved from human embryos. In fact,
fat is routinely discarded by plastic surgeons after liposuction, one
of the most popular cosmetic procedures. Research is increasingly
looking into the therapeutic potential of adult stem cells taken from
blood, bone marrow or fat.
The possibility of creating soft, natural-looking breasts has incited
interest among cosmetic surgeons. Artificial implants, filled with
saline or silicone gel, can rupture, and some say they don't look
natural. A small San Diego company, Cytori Therapeutics Inc., says it
has invented a machine that combines fat with a mixture of stem cells
and other regenerative cells. The device is being used by some
hospitals in Europe and Japan. Cytori is sponsoring human tests in
Europe and talking to the FDA about similar efforts in the U.S.
Some doctors worry the fat, when reinjected in the breast, could
calcify and interfere with mammographic cancer screening. Another
concern is that fat injections could increase the risk of breast
cancer, because certain anticancer drugs work in postmenopausal women
by inhibiting the production of estrogen, a hormone in fat tissue.
Regardless, some U.S. surgeons are showing before-and-after pictures
of breasts they have enlarged, reshaped or repaired using fat
grafting. There is no proven technique, but some surgeons say they
have been encouraged to experiment after successfully grafting fat to
other parts of the body, including faces and hands.
Jafar Koupaie, a cosmetic surgeon in Brookline, Mass., says he
performed breast surgeries on two women April 1, using a Korean cell-
processing device. He says he is using a patient's own cells and
isn't adding anything from outside the human body. One of the
patients, he says, was his wife.
The FDA says it has only sketchy details about Dr. Koupaie's
procedure. "If you're mixing stem cells with fat cells, that requires
FDA approval," said Karen Riley, an agency spokeswoman. When told of
the FDA's comment, Dr. Koupaie said, "If they want more information,
they can come and see we put only the patient's fat into the machine."
Sydney Coleman, a New York plastic surgeon, published a breast study
last year about fat grafting in Plastic and Reconstructive Surgery, a
medical journal. He has been grafting fat to the breast, without
adding a stem-cell mixture, for many years, although other doctors
have had difficulty adopting his technique. Cytori has begun working
with plastic surgeons in Japan, Israel, Italy and France who are
using its device.
Even the medical establishment is revisiting the issue: The American
Society for Aesthetic Plastic Surgery's research arm is funding a
breast-augmentation study. Patients are being recruited at
ClinicalTrials.
The cost of fat-grafting procedures for cosmetic breast surgery
ranges widely, from $15,000 to $30,000 or more depending on the
surgeon and clinic.
Fat transplantation "has moved into center stage from the backroom,"
says Scott Spear, a plastic surgeon at Georgetown University in
Washington, D.C., who is conducting the study. He says he hopes it
will validate the safety and efficacy of fat grafting in the breast.
But Dr. Spear says the study won't answer a key question: how much
the processing of fat-derived stem cells contributes to the success
of the surgery. It is possible that the transplanted fat alone
contains enough stem cells to do the job, he says.
So far, neither Cytori nor Dr. Yoshimura -- who uses his own, manual
process to supplement stem cells in fat -- has provided sufficient
evidence to demonstrate that bolstering fat with more stem cells
improves graft survival, Dr. Spear says. Dr. Yoshimura and Cytori,
who are working separately, both say their studies are promising but
agree more research is needed.
'Natural Looking Forever'
Dr. Yoshimura says he began testing his technique in patients in
2003. He has performed about 200 operations, mostly on Japanese
women, but also on some from the U.S. and Canada. He operates on
Saturdays out of the luxurious, wood-paneled Cellport Clinic in the
Tokyo suburb of Yokohama.
The clinic, which includes a cell-processing laboratory, was built
two years ago at a cost of $26 million by Japan's Biomaster Inc. The
venture-capital-
talking with potential partners about constructing similar clinics
outside Japan.
Dr. Yoshimura, who calls his operation "cell-assisted lipotransfer,
starts with a liposuction procedure to obtain fat, typically from a
woman's thigh. He divides the fat in two: Half is processed through a
centrifuge, yielding a concentrated stem-cell mixture that is then
recombined with the other half. The cell-supplemented graft is
delivered through a syringe at four injection sites into the breast.
The surgery takes three to four hours, he says.
Like other surgeons who perform fat-transfer procedures, he can't
predict exactly how much of a graft will survive, but says most of
the tissue volume stabilizes within three months. Dr. Yoshimura says
his average graft survival rate is 54%. That makes it difficult to
give a woman an augmentation of more than one bra-cup size, from
an "A" to a "B," for instance. But the procedure can be repeated. A
handful of Dr. Yoshimura's patients have returned for a second
augmentation surgery. One Canadian woman says she paid about $20,000
for the first operation and $15,000 for the second.
Such surgeries are also being done at two other clinics in Japan, the
Seishin Cosmetic Clinic in Tokyo and Kyushu Central Hospital in
Fukuoka. Surgeons at both places process stem cells using the machine
developed by Cytori.
By automating the cell-processing procedure at bedside during a
surgery, Cytori hopes to make fat transplantation easier, faster and
more predictable. It says it is aiming for a total procedure time of
about one hour with new machines developed with its partner, Olympus
Corp., the Japanese maker of cameras and medical equipment.
To tout its procedure, the Seishin clinic recently ran pictures of a
bikini-clad woman showing how her natural bust was augmented by
surgery. Speaking through a translator, the woman, Erika Igarashi,
said in an interview she was unhappy about her flat chest and began
researching Internet sites last fall. She found the Seishin clinic
and volunteered. After a consultation, she stopped dieting to have
enough body fat for the operation, which was performed Nov. 7. Ms.
Igarashi said she didn't pay for the procedure.
When she woke up, she says, "I looked down and saw big breasts." She
felt pain in her thighs where fat was harvested and her breasts
initially felt "hard and heavy." Now, more than nine months later,
her breasts are a bit smaller, but the size has stabilized, she says.
Her new form gives her "lots of confidence," she says, adding she can
wear "a greater variety of clothing," including low-cut dresses. The
22-year-old university graduate works part-time in a nightclub and is
looking for a job in the cosmetics industry.
Cytori says it has invested about $100 million in researching and
developing its device, which looks like a portable dishwasher and is
priced between $75,000 and $100,000.
With commercialization moving ahead in Japan and Europe, Cytori is
now taking aim at the U.S. It hopes the FDA will allow it to begin
human tests with its device next year to reconstruct breasts damaged
by cancer surgery. It has also retained Dr. Coleman, the New York
surgeon, as a consultant. Cytori hopes its device will eventually be
used to regenerate tissue for treating cardiovascular disease,
orthopedic damage, gastrointestinal disorders and pelvic health
conditions.
Write to Rhonda L. Rundle at rhonda.rundle@
http://online.
mod=googlenews_
«¤»¥«¤»§«¤»¥«¤»§«¤»¥«¤»«¤»¥«¤»§«¤»¥«¤»§«¤»¥«
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
StemCells subscribers may also be interested in these sites:
Children's Neurobiological Solutions
http://www.CNSfoundation.org/
Cord Blood Registry
http://www.CordBlood.com/at.cgi?a=150123
The CNS Healing Group
http://groups.yahoo.com/group/CNS_Healing
____________________________________________
«¤»¥«¤»§«¤»¥«¤»§«¤»¥«¤»«¤»¥«¤»§«¤»¥«¤»§«¤»¥«
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
Change settings via the Web (Yahoo! ID required)
Change settings via email: Switch delivery to Daily Digest | Switch format to Traditional
Visit Your Group | Yahoo! Groups Terms of Use | Unsubscribe
__,_._,___
No comments:
Post a Comment