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SPIONs to Track Functioning of Stem Cells Inside Body

Posted: June 22, 2012 at 7:15 pm

Have you ever wondered what happens to the stem cells once it is implanted in our body?

Well, now scientists had developed a method to track the stem cells in our body, according to a new report.

Scientists from the University of Liverpool have developed new methods to track stem cells and the changes that happen to them after they have been in the body for a significant period of time.

Scientists "labeled" the cells with superparamagnetic iron oxide nanoparticles (SPIONs) before they were administered to the patients.

The magnetic resonance imaging (MRI) scans clearly showed movement of the stem cells and the scientists could determine whether the stem cells reached their intended target or not.

However, scientists warn that conditions within the body's cells can lead to the degradation of SPIONs and reduce the ability of MRI scans to pick up on their signal in the long-term.

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To overcome this drawback, scientists are developing new methods to visualise SPION's in the cells before they enter the body to learn their performance in the long-term.

Photothermal technique, a unique optical imaging system is used to improve SPION labelling so that particles survive for longer and have minimal impact on the function of the transplanted cells.

"In order to fully explore this potential, however, more technological developments are needed to understand how stem cells behave in the body after transplantation. If we can't monitor stem cells effectively, it can have serious implications for patient health. Studies have already shown that if cells migrate to the circulatory system, beyond their target organ or tissue site, then it can cause inflammation in the body," said Dr Lara Bogart, scientist at the University's Institute of Integrative Biology in a statement.

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Dureza: Stem cells, youth elixir

Posted: June 22, 2012 at 7:15 pm

Saturday, June 23, 2012

PACMAN TIDBITS. A Facebook friend, Davaoea US resident Choda Cuevo, commented re Pacman-Bradley issue: "It's not about Manny. It's all about money"! Atta girl!

My friend, Col. Art Evangelista, PNP officer, commented that it looks like a conspiracy because big money promoters in the boxing world are now grooming Bradley due to Pacman's rumored early retirement. So launching a new money-making machine, huh!

Have something to report? Tell us in text, photos or videos.

*****

SCARBOROUGH AFFAIR. Our first move was to militarize the issue and issued brave words. Now, we are withdrawing our Pinoy vessels from the disputed shoal, citing bad weather as reason. Really? As in chess, we made bad moves. We lost some pawns (like our bananas) in the exchange. Now we are retreating. I hope we're several moves ahead in this touchy game! New Ambassador to China, Sonia Brady, whom I personally know during my Palace stint, will be up to the job. Good choice, good move Mr. President. But bad opening move!

*****

CHINA RULES. I'm halfway reading Martin Jacques' book When China Rules the World. It predicts that by 2025, China's economy will outrun all others (Japan, EU, etc.) and will be a close second to the United States. But by 2050, China will be way ahead with her economy doubly bigger than the US. India will be close behind while Indonesia will contend. All of today's advanced countries will lag behind. Interesting reading.

*****

JUSTICE CARPIO. There's a guy who's been silent but had shown all these years his independence and judicial fortitude. Justice Antonio Carpio, a Davaoeo, was even bypassed in the past. But he stayed the course. It's not because he is a Davaoeo that I am rooting for him. But he deserves to be seriously considered Chief Justice as he is the most senior Supreme Court justice now. That's my unsolicited advice, Mr. President.

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Rensselaer and New York State Launch New Stem Cell Research Center

Posted: June 22, 2012 at 7:14 pm

Newswise Troy, N.Y. Ground-breaking research to advance the application of stem cells to address critical injuries and diseases will be taking place at Rensselaer Polytechnic Institute, in a new center funded by New York state and opened today (June 22, 2012).

The Rensselaer Center for Stem Cell Research was launched officially by Rensselaer President Shirley Ann Jackson, New York State Department of Health Commissioner Nirav Shah, and Jonathan Dordick, director of the Rensselaer Center for Biotechnology and Interdisciplinary Studies (CBIS) and the Howard P. Isermann 42 Professor of Chemical and Biological Engineering. They were joined at the ribbon cutting by Glenn Monastersky, CBIS operations director and biomedical engineering professor of practice. Monastersky is also principal investigator under the $2.45 million grant awarded to fund the new center, from the New York State Stem Cell Science Program (NYSTEM).

The opening of the Rensselaer Center for Stem Cell Research marks a milestone on the path toward this important area of exploration, which promises so much in terms of alleviating disease and improving health, said Jackson. At the center we will work at the frontiers of this promising discipline in collaboration with New York state and investigators from across the region.

This research complements stem cell research, sponsored by New York and the National Institutes of Health, that is already in progress at Rensselaer, Jackson added. Due to our commitment to biotechnology that began over 10 years ago under The Rensselaer Plan, we are able to link engineering with the life and physical sciences in ways that allow us to explore new possibilities. We are grateful to Dr. Shah and the state of New York for their leadership in this important research area, and for providing the funding to launch this center.

Governor Cuomo recognizes that stem cell research is a vital and growing industry that helps create jobs here in the Capital Region and around the state, said Nirav R. Shah, M.D., M.P.H., New York State Commissioner of Health. Targeting our investment in results-oriented research enterprises like this center will lead to medical advances as well as expand our economy and make New York the place to be for 21st century health and science research.

According to Dordick, the new center continues to place CBIS and the research conducted there on the leading edge of efforts to harness advances in biotechnology to address 21st century health challenges.

Ranging from our work on the blood anti-coagulant drug heparin to solutions to fighting some of todays super bugs to important advances in understanding Alzheimers disease, we are focusing our efforts on scientific advances that will ultimately open the doors to new cures for traumatic injuries or treatments for long-term conditions and diseases, Dordick said. Now, working with our partners at New York state and other researchers in the region, we will expand our work on stem cells to help the medical and scientific research communities advance efforts to better understand those cells and how they can be used in medicine.

Research on stem cells offers promise in an array of health areas, ranging from trying to regenerate damaged nerve cells following spinal cord injuries to offering potential cures for autoimmune diseases such as multiple sclerosis, lupus, rheumatoid arthritis, and Type 1 diabetes. According to the National Institutes of Health (NIH), stem cells are important because unlike other cells in the human body they are capable of dividing and renewing themselves for long periods. In addition, because stem cells are unspecialized meaning that they are not associated with any tissue-specific functions early research has shown that under the right circumstances these cells can give rise to cells associated with specific functions, under a process called differentiation. Today, according to NIH, scientists are just beginning to understand the so-called triggers that can start stem cell differentiation into, for example, nerve, muscle, or bone cells.

The new state-of-the-art center is housed on the ground floor of the Rensselaer biotechnology center. In addition to advanced cell biology research equipment, new lab equipment acquired with funding from New York state includes an Olympus VivaView microscopy/incubation system and a Thermo Fisher Arrayscan cell-imaging system that utilizes advanced optics and analytical software to guide the analysis of stem cell development.

The Rensselaer Center for Stem Cell Research and its associated scientific staff, will enable collaborations with several New York partners including the New York Neural Stem Cell Institute, Albany Medical College, the University at Albany, the University of Rochester Medical School, and the Trudeau Institute. The main focus of the center is the basic science critical to development of stem cell-based therapies for human diseases and traumatic injuries.

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Scientists grow tiny liver in mouse’s head

Posted: June 22, 2012 at 9:24 am

Using stem cells from human skin, Japanese scientists have grown a small human liver inside the skull of a mouse.

Hideki Taniguchi and Takanori Takebe from Yokohama City University used stem cells generated from human skin cells and developed them into percussor liver cells, the New Scientist reports.

Then they added other cells from umbilical cord blood vessels. The combination of cells then "guided itself" to form a small structure similar to liver tissue, Takebe said.

"We mixed and graded the cells onto the culture dish and they moved to form a cluster," he said. "It was a surprising outcome from what was, to be honest, an accident."

They implanted the structure into the head of a mouse, which was suffering from a severe genetic immune system disorder that prevented it from having an immune reaction to the foreign tissues.

The increased blood flow in the mouse's skull allowed the tissue to keep growing.

Within 48 hours, human blood vessels and human proteins formed. Glycogen and amino acids levels were the same as those of a human liver.

"It's not yet a perfect liver," Takebe said. "Improvements need to be made, such as the reconstruction of a bile duct."

The study could be significant for the field of regenerative medicine, but the researchers aren't yet sure whether the organ is a fully functioning liver, or whether they will be able to scale it to human size.

The findings were presented at the at the International Society for Stem Cell Research's annual meeting in Yokohama.

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SPIONs to Track Functioning of Stem Cells Inside Body

Posted: June 22, 2012 at 9:24 am

Have you ever wondered what happens to the stem cells once it is implanted in our body?

Well, now scientists had developed a method to track the stem cells in our body, according to a new report.

Scientists from the University of Liverpool have developed new methods to track stem cells and the changes that happen to them after they have been in the body for a significant period of time.

Scientists "labeled" the cells with superparamagnetic iron oxide nanoparticles (SPIONs) before they were administered to the patients.

The magnetic resonance imaging (MRI) scans clearly showed movement of the stem cells and the scientists could determine whether the stem cells reached their intended target or not.

However, scientists warn that conditions within the body's cells can lead to the degradation of SPIONs and reduce the ability of MRI scans to pick up on their signal in the long-term.

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To overcome this drawback, scientists are developing new methods to visualise SPION's in the cells before they enter the body to learn their performance in the long-term.

Photothermal technique, a unique optical imaging system is used to improve SPION labelling so that particles survive for longer and have minimal impact on the function of the transplanted cells.

"In order to fully explore this potential, however, more technological developments are needed to understand how stem cells behave in the body after transplantation. If we can't monitor stem cells effectively, it can have serious implications for patient health. Studies have already shown that if cells migrate to the circulatory system, beyond their target organ or tissue site, then it can cause inflammation in the body," said Dr Lara Bogart, scientist at the University's Institute of Integrative Biology in a statement.

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Stem cell therapy in Hawaii going to the dogs

Posted: June 22, 2012 at 9:21 am

HAWAII KAI (HawaiiNewsNow) -

Cutting-edge technology is helping Hawaii's pets live better lives for months, even years. We were there as a beloved dog named Kumba received one of the first-ever, in-clinic stem cell therapy surgeries in the islands.

13 year old Kumba doesn't know he's a guinea pig. The Rottweiler-Lab mix is one of the first in Hawaii to undergo the stem cell procedure at Surf Paws in Hawaii Kai.

Kumba suffers severe arthritis in his hips and knees, doesn't eat much, and is even a bit depressed. "It's an effort for him to get up off the floor, and when he gets up and crosses the room, you can see the stiffness," says his owner, Rumi Hospodar.

Kumba's kids learn some of details of his surgery. Then, he's moved to a table and nods off from anesthesia. Once he's prepped, the procedure begins. The vet removes about two tablespoons of fat tissue from Kumba's shoulder. From there, the stem cells are separated from the fat and activated. Then, they're injected back into the affected areas.

The entire process takes four hours, but the dog is actually only under for about 20 minutes. Surf Paws used to send the tissue to the mainland for processing, but with technology from Medi-Vet America, they can do it all here.

"The patient had to be, you know, go home and come back a few days later and the timing was a little bit difficult. Now, everything is same day," says Surf Paws veterinarian Dr. Cristina Miliaresis.

Cost depends on the size of animal but can run up to $2,800. It's mainly done on dogs, cats, and horses who suffer osteoarthritis, hip dysplasia, ligament and cartilage damage, and other degenerative diseases. Their quality of life can improve within a couple of weeks.

Dr. Miliaresis says, "Some people might say, 'Oh, the dog's 13. Why are you doing this for a 13 year old dog? But even 6 months, pain-free, after a very, it's not simple, but it's a pretty straightforward procedure, to me (would be) just amazing."

The techs move all 97 pounds of Kumba to post-op - while his anxious owner looks on.

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Stem cell therapy gives dog new lease on life

Posted: June 22, 2012 at 9:21 am

Stem cell therapy has gone to the dogs. The technology aimed at giving ailing pets a new lease on life has arrived in Hawaii.

13-year-old Kumba is still a bit dazed, coming out of general anesthesia. The veterinarian at Surf Paws Animal Hospital just extracted about two tablespoons of fat tissue from the dog. Stem cells from that fat tissue will then be used to help him with his arthritis.

"Once we get the stem cells then we do some extra processing steps to wake them up so that they're very active. At the end of that, the veterinarian will inject the stem cells into the areas of damage," says Carol Spangler Vaughn of Medivet America.

A company called MediVet America is bringing the technology to animal hospitals in Hawaii. This is a first for Oahu. The company says the procedure works on other animals with different types of ailments.

"So the nice thing about this we're not gonna give you a puppy back but we'll give you some nice quality time with your animal. You won't have to put them down because of their arthritis," Vaughn said.

Kumba's arthritis had gotten worse in the past five years, and his owners were wondering whether it was best to end his life to stop him from suffering.

'When we start saying things like oh we don't know how much longer, poor Kumba, he must be in a lot of pain. That kind of stuff really hits home especially since he's been with us for so long," said Rumi Hospodar Kumba's owner.

But with this new procedure, they're counting on Kumba to be pain free in a few weeks and are looking forward to get backdoing some of the things Kumba enjoyed, like swimming.

"He can't do that now since his joints are so bad, and he's getting so old so that's one of the many things I'm looking forward to," Kelsea Hopsodar, his other owner said.

The cost of the procedure runs from 24 to 28 hundred dollars, and it's covered by most pet insurance policies.

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Scientists grow tiny liver in mouse's head

Posted: June 22, 2012 at 5:13 am

Using stem cells from human skin, Japanese scientists have grown a small human liver inside the skull of a mouse.

Hideki Taniguchi and Takanori Takebe from Yokohama City University used stem cells generated from human skin cells and developed them into percussor liver cells, the New Scientist reports.

Then they added other cells from umbilical cord blood vessels. The combination of cells then "guided itself" to form a small structure similar to liver tissue, Takebe said.

"We mixed and graded the cells onto the culture dish and they moved to form a cluster," he said. "It was a surprising outcome from what was, to be honest, an accident."

They implanted the structure into the head of a mouse, which was suffering from a severe genetic immune system disorder that prevented it from having an immune reaction to the foreign tissues.

The increased blood flow in the mouse's skull allowed the tissue to keep growing.

Within 48 hours, human blood vessels and human proteins formed. Glycogen and amino acids levels were the same as those of a human liver.

"It's not yet a perfect liver," Takebe said. "Improvements need to be made, such as the reconstruction of a bile duct."

The study could be significant for the field of regenerative medicine, but the researchers aren't yet sure whether the organ is a fully functioning liver, or whether they will be able to scale it to human size.

The findings were presented at the at the International Society for Stem Cell Research's annual meeting in Yokohama.

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Superparamagnetic iron oxide nanoparticles could help track stem cells in the body

Posted: June 22, 2012 at 5:13 am

Researchers at the University of Liverpool have developed new methods to track stem cells and further understanding of what happens to them after they have been in the body for a significant period of time.

Stem cells are used to treat conditions such as leukaemia and have the potential to treat many more diseases and disorders where patient survival is reliant on organ and tissue donation. Currently, however, it is difficult for medics to establish whether stem cells have survived following transplantation in the body and if they reach their target site or migrate elsewhere.

In order to track stem cells in the body scientists use superparamagnetic iron oxide nanoparticles (SPIONs) to 'label' the cells before they are administered into the patient. These particles can be picked up by magnetic resonance imaging (MRI) scans and help medics establish if the stem cells reach their intended target. Conditions within the body's cells, however, can lead to the degradation of SPIONs and reduce the ability of MRI scans to pick up on their signal in the long-term.

Scientists at Liverpool are developing methods to visualise SPIONs in the cells before they enter the body to learn where the particles are going within the stem cell and help predict how they might perform once they are inside the body over a long period of time. They are using a photothermal technique, a unique optical imaging system, to improve SPION labelling so that particles survive for longer and have minimal impact on the function of the transplanted cells.

Dr Lara Bogart, from the University's Institute of Integrative Biology, said: "Stem cells have the potential to replace and repair damaged tissue to preclude the need for a patient to wait for an organ or tissue transplant. Research is ongoing into how it could be used to treat a wide variety of diseases such as Alzheimer's, Parkinson's disease, and type one diabetes.

"In order to fully explore this potential, however, more technological developments are needed to understand how stem cells behave in the body after transplantation. If we can't monitor stem cells effectively, it can have serious implications for patient health. Studies have already shown that if cells migrate to the circulatory system, beyond their target organ or tissue site, then it can cause inflammation in the body.

"Labelling stem cells is hugely valuable to tracking their movements in the body, but we need to know more about how the particles used interact with stem cells. Using new imaging systems we can work out their precise location in the cell and how they behave over time. We hope to use this information to improve understanding of the MRI signal that tracks SPIONs once stem cells have been transplanted."

More information: The research is published in the journal, ACS Nano.

Journal reference: ACS Nano

Provided by University of Liverpool

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Research could help track stem cells in the body

Posted: June 22, 2012 at 5:13 am

Public release date: 21-Jun-2012 [ | E-mail | Share ]

Contact: Samantha Martin samantha.martin@liv.ac.uk 044-015-179-42248 University of Liverpool

Researchers at the University of Liverpool have developed new methods to track stem cells and further understanding of what happens to them after they have been in the body for a significant period of time.

Stem cells are used to treat conditions such as leukaemia and have the potential to treat many more diseases and disorders where patient survival is reliant on organ and tissue donation. Currently, however, it is difficult for medics to establish whether stem cells have survived following transplantation in the body and if they reach their target site or migrate elsewhere.

In order to track stem cells in the body scientists use superparamagnetic iron oxide nanoparticles (SPIONs) to 'label' the cells before they are administered into the patient. These particles can be picked up by magnetic resonance imaging (MRI) scans and help medics establish if the stem cells reach their intended target. Conditions within the body's cells, however, can lead to the degradation of SPIONs and reduce the ability of MRI scans to pick up on their signal in the long-term.

Scientists at Liverpool are developing methods to visualise SPIONs in the cells before they enter the body to learn where the particles are going within the stem cell and help predict how they might perform once they are inside the body over a long period of time. They are using a photothermal technique, a unique optical imaging system, to improve SPION labelling so that particles survive for longer and have minimal impact on the function of the transplanted cells.

Dr Lara Bogart, from the University's Institute of Integrative Biology, said: "Stem cells have the potential to replace and repair damaged tissue to preclude the need for a patient to wait for an organ or tissue transplant. Research is ongoing into how it could be used to treat a wide variety of diseases such as Alzheimer's, Parkinson's disease, and type one diabetes.

"In order to fully explore this potential, however, more technological developments are needed to understand how stem cells behave in the body after transplantation. If we can't monitor stem cells effectively, it can have serious implications for patient health. Studies have already shown that if cells migrate to the circulatory system, beyond their target organ or tissue site, then it can cause inflammation in the body.

"Labelling stem cells is hugely valuable to tracking their movements in the body, but we need to know more about how the particles used interact with stem cells. Using new imaging systems we can work out their precise location in the cell and how they behave over time. We hope to use this information to improve understanding of the MRI signal that tracks SPIONs once stem cells have been transplanted."

###

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Research could help track stem cells in the body

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