Next generation of stem cell scientists leave their mark

One of the favorite events of the year for the team here at CIRM is our annual SPARK (Summer Program to Accelerate Regenerative Medicine Knowledge) conference. This is where high school students, who spent the summer interning at world class stem cell research facilities around California, get to show what they learned. It’s always an engaging, enlightening, and even rather humbling experience.

The students, many of whom are first generation Californians, start out knowing next to nothing about stem cells and end up talking as if they were getting ready for a PhD. Most say they went to their labs nervous about what lay ahead and half expecting to do menial tasks such as rinsing out beakers. Instead they were given a lab coat, safety glasses, stem cells and a specific project to work on. They learned how to handle complicated machinery and do complex scientific experiments.

But most importantly they learned that science is fun, fascinating, frustrating sometimes, but also fulfilling. And they learned that this could be a future career for them.

We asked all the students to blog about their experiences and the results were extraordinary. All talked about their experiences in the lab, but some went beyond and tied their internship to their own lives, their past and their hopes for the future.

Judging the blogs was a tough assignment, deciding who is the best of a great bunch wasn’t easy. But in the end, we picked three students who we thought captured the essence of the SPARK program. This week we’ll run all those blogs.

We begin with our third place blog by Dayita Biswas from UC Davis.

Personal Renaissance: A Journey from Scientific Curiosity to Confirmed Passions

By Dayita Biswas

As I poured over the pages of my battered Campbell textbook, the veritable bible for any biology student, I saw unbelievable numbers like how the human body is comprised of over 30 trillion cells! Or how we have over 220 different types of cells— contrary to my mental picture of a cell as a circle. Science, and biology in particular, has no shortage of these seemingly impossible Fermi-esque statistics that make one do a double-take. 

My experience in science had always been studying from numerous textbooks in preparation for a test or competitions, but textbooks only teach so much. The countless hours I spent reading actually demotivated me and I constantly asked myself what was the point of learning about this cycle or that process — the overwhelming “so what?” question. Those intriguing numbers that piqued my interest were quickly buried under a load of other information that made science a static stream of words across a page. 

That all changed this summer when I had the incredible opportunity to work in the Nolta lab under my mentor, Whitney Cary. This internship made science so much more tangible and fun to be a part of.  It was such an amazing environment, being in the same space with people who all have the same goals and passion for science that many high school students are not able to truly experience. Everyone was so willing to explain what they were doing, and even went out of their way to help if I needed papers or had dumb questions.

This summer, my project was to create embryoid bodies and characterize induced pluripotent stem cells (iPSCs) from children who had Jordan’s Syndrome, an extremely rare neurodevelopmental disease whose research has applications in Alzheimer’s and autism.

 I had many highs and lows during this research experience. My highs were seeing that my iPSCs were happy and healthy. I enjoyed learning lab techniques like micro-pipetting, working in a biological safety hood, feeding, freezing, and passaging cells. My lows were having to bleach my beloved iPSCs days after they failed to survive, and having unsuccessful protocols. However, while my project consistently failed, these failures taught me more than my successes.

I learned that there is a large gap between being able to read about techniques and being “book smart” and actually being able to think critically about science and perform research. Science, true science, is more than words on a page or fun facts to spout at a party. Science is never a straight or easy answer, but the mystery and difficulty is part of the reason it is so interesting. Long story short: research is hard and it takes time and patience, it involves coming in on weekends to feed cells, and staying up late at night reading papers.         

The most lasting impact that this summer research experience had was that everything we learn in school and the lab are all moving us towards the goal of helping real people. This internship renewed my passion for biology and cemented my dream of working in this field. It showed me that I don’t have to wait to be a part of dynamic science and that I can be a small part of something that will change, benefit, and save lives.

This internship meant being a part of something bigger than myself, something meaningful. We must always think critically about what consequences our actions will have because what we do as scientists and researchers— and human beings will affect the lives of real people. And that is the most important lesson anyone can hope to learn.

                                                                                                   

And here’s a bonus, a video put together by the SPARK students at Cedars-Sinai Medical Center.

From bench to bedside: a Q&A with stem cell expert Jan Nolta

At CIRM we are privileged to work with many remarkable people who combine brilliance, compassion and commitment to their search for new therapies to help people in need. One of those who certainly fits that description is UC Davis’ Jan Nolta.

This week the UC Davis Newsroom posted a great interview with Jan. Rather than try and summarize what she says I thought it would be better to let her talk for herself.

Jan Nolta
Jan Nolta

Talking research, unscrupulous clinics, and sustaining the momentum

(SACRAMENTO) —

In 2007, Jan Nolta returned to Northern California from St. Louis to lead what was at the time UC Davis’ brand-new stem cell program. As director of the UC Davis Stem Cell Program and the Institute for Regenerative Cures, she has overseen the opening of the institute, more than $140 million in research grants, and dozens upon dozens of research studies. She recently sat down to answer some questions about regenerative medicine and all the work taking place at UC Davis Health.

Q: Turning stem cells into cures has been your mission and mantra since you founded the program. Can you give us some examples of the most promising research?

I am so excited about our research. We have about 20 different disease-focused teams. That includes physicians, nurses, health care staff, researchers and faculty members, all working to go from the laboratory bench to patient’s bedside with therapies.

Perhaps the most promising and exciting research right now comes from combining blood-forming

stem cells with gene therapy. We’re working in about eight areas right now, and the first cure, something that we definitely can call a stem cell “cure,” is coming from this combined approach.

Soon, doctors will be able to prescribe this type of stem cell therapy. Patients will use their own bone marrow or umbilical cord stem cells. Teams such as ours, working in good manufacturing practice facilities, will make vectors, essentially “biological delivery vehicles,” carrying a good copy of the broken gene. They will be reinserted into a patient’s cells and then infused back into the patient, much like a bone marrow transplant.

“Perhaps the most promising and exciting research right now comes from combining blood-forming stem cells with gene therapy.”

Along with treating the famous bubble baby disease, where I had started my career, this approach looks very promising for sickle cell anemia. We’re hoping to use it to treat several different inherited metabolic diseases. These are conditions characterized by an abnormal build-up of toxic materials in the body’s cells. They interfere with organ and brain function. It’s caused by just a single enzyme. Using the combined stem cell gene therapy, we can effectively put a good copy of the gene for that enzyme back into a patient’s bone marrow stem cells. Then we do a bone marrow transplantation and bring back a person’s normal functioning cells.

The beauty of this therapy is that it can work for the lifetime of a patient. All of the blood cells circulating in a person’s system would be repaired. It’s the number one stem cell cure happening right now. Plus, it’s a therapy that won’t be rejected. These are a patient’s own stem cells. It is just one type of stem cell, and the first that’s being commercialized to change cells throughout the body.

Q: Let’s step back for a moment. In 2004, voters approved Proposition 71. It has funded a majority of the stem cell research here at UC Davis and throughout California. What’s been the impact of that ballot measure and how is it benefiting patients?

We have learned so much about different types of stem cells, and which stem cell will be most appropriate to treat each type of disease. That’s huge. We had to first do that before being able to start actual stem cell therapies. CIRM [California Institute for Regenerative Medicine] has funded Alpha Stem Cell Clinics. We have one of them here at UC Davis and there are only five in the entire state. These are clinics where the patients can go for high-quality clinical stem cell trials approved by the FDA [U.S. Food and Drug Administration]. They don’t need to go to “unapproved clinics” and spend a lot of money. And they actually shouldn’t.

“By the end of this year, we’ll have 50 clinical trials.”

By the end of this year, we’ll have 50 clinical trials [here at UC Davis Health]. There are that many in the works.

Our Alpha Clinic is right next to the hospital. It’s where we’ll be delivering a lot of the immunotherapies, gene therapies and other treatments. In fact, I might even get to personally deliver stem cells to the operating room for a patient. It will be for a clinical trial involving people who have broken their hip. It’s exciting because it feels full circle, from working in the laboratory to bringing stem cells right to the patient’s bedside.

We have ongoing clinical trials for critical limb ischemia, leukemia and, as I mentioned, sickle cell disease. Our disease teams are conducting stem cell clinical trials targeting sarcoma, cellular carcinoma, and treatments for dysphasia [a swallowing disorder], retinopathy [eye condition], Duchenne muscular dystrophy and HIV. It’s all in the works here at UC Davis Health.

There’s also great potential for therapies to help with renal disease and kidney transplants. The latter is really exciting because it’s like a mini bone marrow transplant. A kidney recipient would also get some blood-forming stem cells from the kidney donor so that they can better accept the organ and not reject it. It’s a type of stem cell therapy that could help address the burden of being on a lifelong regime of immunosuppressant drugs after transplantation.

Q: You and your colleagues get calls from family members and patients all the time. They frequently ask about stem cell “miracle” cures. What should people know about unproven treatments and unregulated stem cell clinics?

That’s a great question.The number one rule is that if you’re asked to pay money for a stem cell treatment, don’t do it. It’s a big red flag.

When it comes to advertised therapies: “The number one rule is that if you’re asked to pay money for a stem cell treatment, don’t do it. It’s a big red flag.”

Unfortunately, there are unscrupulous people out there in “unapproved clinics” who prey on desperate people. What they are delivering are probably not even stem cells. They might inject you with your own fat cells, which contain very few stem cells. Or they might use treatments that are not matched to the patient and will be immediately rejected. That’s dangerous. The FDA is shutting these unregulated clinics down one at a time. But it’s like “whack-a-mole”: shut one down and another one pops right up.

On the other hand, the Alpha Clinic is part of our mission is to help the public get to the right therapy, treatment or clinical trial. The big difference between those who make patients pay huge sums of money for unregulated and unproven treatments and UC Davis is that we’re actually using stem cells. We produce them in rigorously regulated cleanroom facilities. They are certified to contain at least 99% stem cells.

Patients and family members can always call us here. We can refer them to a genuine and approved clinical trial. If you don’t get stem cells at the beginning [of the clinical trial] because you’re part of the placebo group, you can get them later. So it’s not risky. The placebo is just saline. I know people are very, very desperate. But there are no miracle cures…yet. Clinical trials, approved by the FDA, are the only way we’re going to develop effective treatments and cures.

Q: Scientific breakthroughs take a lot of patience and time. How do you and your colleagues measure progress and stay motivated?   

Motivation?  “It’s all for the patients.”

It’s all for the patients. There are not good therapies yet for many disorders. But we’re developing them. Every day brings a triumph. Measuring progress means treating a patient in a clinical trial, or developing something in the laboratory, or getting FDA approval. The big one will be getting biological license approval from the FDA, which means a doctor can prescribe a stem cell or gene therapy treatment. Then it can be covered by a patient’s health insurance.

I’m a cancer survivor myself, and I’m also a heart patient. Our amazing team here at UC Davis has kept me alive and in great health. So I understand it from both sides. I understand the desperation of “Where do I go?” and “What do I do right now?” questions. I also understand the science side of things. Progress can feel very, very slow. But everything we do here at the Institute for Regenerative Cures is done with patients in mind, and safety.

We know that each day is so important when you’re watching a loved one suffer. We attend patient events and are part of things like Facebook groups, where people really pour their hearts out. We say to ourselves, “Okay, we must work harder and faster.” That’s our motivation: It’s all the patients and families that we’re going to help who keep us working hard.

CIRM public events highlight uncertain future of stem cell research

When governments cut funding for scientific research the consequences can be swift, and painful. In Canada last week for example, the government of Ontario cut $5 million in annual funding for stem cell research, effectively ending a project developing a therapy to heal the damaged lungs of premature babies.

Here in the US the federal government is already placing restrictions on support for fetal tissue research and there is speculation embryonic stem cell research could be next. That’s why agencies like CIRM are so important. We don’t rely on a government giving us money every year. Instead, thanks to the voters of California, we have had a steady supply of funds to enable us to plan long-term and support multi-year projects.

But those funds are due to run out soon. We anticipate funding our last new awards this year and while we have enough money to continue supporting all the projects our Board has already approved, we won’t be able to take on any new projects. That’s bad news for the scientists and, ultimately, really bad for the patients who are in need of new treatments for currently incurable diseases.

We are going to talk about that in two upcoming events.

UC San Diego Sanford Stem Cell Clinical Center

The first is a patient advocate event at UC San Diego on Tuesday, May 28th from 12.30pm to 1.30pm. It’s free, there is parking and snacks and refreshments will be available.

This will feature UC San Diego’s Dr. Catriona Jamieson, CIRM’s President and CEO Dr. Maria Millan and CIRM Board member and Patient Advocate for Parkinson’s Disease, David Higgins PhD. The three will talk about the exciting progress being made at UC San Diego and other programs around California, but also the uncertain future and the impact that could have for the field as a whole.

Here’s a link to an Eventbrite page that has more information about the event and also a link to allow you to RSVP ahead of time.

For all of you who don’t live in the San Diego Area – or who do but can’t make it to the event – we are holding a similar discussion online on a special Facebook Live: Ask the Stem Cell Team About the Future of Stem Cell Research event on Thursday, May 30th from noon till 1pm PDT.

This also features Dr. Millan and Dr. Higgins, but it also features UC Davis stem cell scientist, CIRM-grantee and renowned blogger Paul Knoepfler PhD.

Each brings their own experience, expertise and perspective on the field and will discuss the impact that a reduction in funding for stem cell research would have, not just in the short term but in the long run.

Because we all have a stake in what happens, both events – whether it’s in person or online – include time for questions from you, the audience.

You can find our Facebook Live: Ask the Stem Cell Team About the Future of Stem Cell Research on our Facebook page at noon on May 30th PDT

Mending Stem Cells: The Past, Present & Future of Regenerative Medicine

UCSF’s Mission Bay Campus

For years we have talked about the “promise” and the “potential” of stem cells to cure patients. But more and more we are seeing firsthand how stem cells can change a patient’s life, even saving it in some cases. That’s the theme of the 4th Annual CIRM Alpha Stem Cell Clinics Network Symposium.

It’s not your usual symposium because this brings together all the key players in the field – the scientists who do the research, the nurses and doctors who deliver the therapies, and the patients who get or need those therapies. And, of course, we’ll be there; because without CIRM’s funding to support that research and therapies none of this happens.

We are going to look at some of the exciting progress being made, and what is on the horizon. But along the way we’ll also tackle many of the questions that people pose to us every day. Questions such as:

  • How can you distinguish between a good clinical trial offering legitimate treatments vs a stem cell clinic offering sham treatments?
  • What about the Right to Try, can’t I just demand I get access to stem cell therapies?
  • How do I sign up for a clinical trial, and how much will it cost me?
  • What is the experience of patients that have participated in a stem cell clinical trial?

World class researchers will also talk about the real possibility of curing diseases like sickle cell disease on a national scale, which affect around 100,000 Americans, mostly African Americans and Hispanics. They’ll discuss the use of gene editing to battle hereditary diseases like Huntington’s. And they’ll highlight how they can engineer a patient’s own immune system cells to battle deadly cancers.

So, join us for what promises to be a fascinating day. It’s the cutting edge of science. And it’s all FREE.

Here’s where you can go to find out more information and to sign up for the event.

Stem cell byproducts provide insight into cure for spina bifida

A diagram of an infant born with spina bifida, a birth defect where there is an incomplete closing of the backbone portion of the spinal cord. Photo courtesy of the Texas Children’s Hospital website.

Some of you might remember a movie in the early 2000s by the name of “Miracle in Lane 2”. The film is based on an inspirational true story and revolves around a boy named Justin Yoder entering a soapbox derby competition. In the movie, Justin achieves success as a soapbox derby driver while adapting to the challenges of being in a wheelchair.

Scene from “Miracle in Lane 2”

The reason that Justin is unable to walk is due to a birth defect known as spina bifida, which causes an incomplete closing of the backbone portion of the spinal cord, exposing tissue and nerves. In addition to difficulties with walking, other problems associated with this condition are problems with bladder or bowel control and accumulation of fluid in the brain.

According to the Center for Disease Control (CDC) , each year about 1,645 babies in the US are born with spina bifida, with Hispanic women having the highest rate of children born with the condition. There is currently no cure for this condition, but researchers at UC Davis are one step closer to changing that.

Dr. Aijun Wang examining cells under a microscope. He has identified stem cell byproducts that protect neurons. Photo courtesy of UC Regents/UC Davis Health

Dr. Aijun Wang, Dr. Diana Farmer, and their research team have identified crucial byproducts produced by stem cells that play an important role in protecting neurons. These byproducts could assist with improving lower-limb motion in patients with spina bifida.

Prior to this discovery, Dr. Farmer and Dr. Wang demonstrated that prenatal surgery combined with connective tissue (e.g. stromal cells) derived from stem cells improved hind limb control in dogs with spina bifida. Below you can see a clip of two English bulldogs with spina bifida who are now able to walk.

Their findings were published in the Journal of the Federation of American Societies for Experimental Biology on February 12, 2019.

The team will use their findings to perfect the neuroprotective qualities of a stem cell treatment developed to improve locomotive problems associated with spina bifida.

In a public release posted by EurekaAlert!, Dr. Wang is quoted as saying, “We are excited about what we see so far and are anxious to further explore the clinical applications of this research.”

The discovery and development of a treatment for spina bifida was funded by a $5.66 million grant from CIRM. You can read more about that award and spina bifida on a previous blog post linked here.

Frustration, failure and finally hope in the search for treatments for spina bifida

diana farmer_2015

Dr. Diana Farmer and her team at UC. Davis

By any standards Dr. Diana Farmer is a determined woman who doesn’t let setbacks and failure deter her. As a fetal and neonatal surgeon, and the chair of the Department of Surgery at UC Davis Health, Dr. Farmer has spent years trying to develop a cure for spina bifida. She’s getting closer.

Dr. Farmer and her partner in this research, Dr. Aijun Wang, have already shown they can repair the damage spina bifida causes to the spinal cord, in the womb, in sheep and bulldogs. Last year the CIRM Board voted to fund her research to get the data needed to apply to the US Food and Drug Administration for permission to start a clinical trial in people.

That work is so promising that we decided to profile Dr. Farmer in our 2018 Annual Report.

Here’s excerpts from an interview we conducted with her as part of the Annual Report.

I have been working on this since 2008. We have been thinking about how to help kids with spina bifida walk. It’s not fatal disease but it is a miserable disease.

It’s horrible for parents who think they are about to have a healthy child suddenly be faced with a baby who faces a life long struggle with their health, everything from difficulty or inability to walk to bowel and bladder problems and life-threatening infections.

As a fetal surgeon we used to only focus on fatal diseases because otherwise kids would die. But as we made progress in the field, we had the opportunity to help others who didn’t have a fatal condition, in ways we couldn’t have done in the past.

I’ve always been fascinated by the placenta, it has lots of protective properties. So, we asked the question if we were able to sample fetal cells from the placenta, could we augment those cells, and use them to tissue engineer spinal injuries, in the womb, to improve the outcome for kids with spina bifida?

Dr. Aijun Wang and I have been working on this project for the last decade.  Ten years of work has taken us to this point where we are now ready to move this to the next level.

It’s amazing to me how long this process takes and that’s why we are so grateful to CIRM because this is a rare disease and finding funding for those is hard. A lot of people are scared about funding fetal surgery and CIRM has been a perfect partner in helping bring this approach, blending stem cell therapy and tissue engineering, together.

If this therapy is successful it will have a huge economic impact on California, and on the rest of the world. Because spina bifida is a lifelong condition involving many operations, many stays in the hospital, in some cases lifelong use of a wheelchair. This has a huge financial burden on the family. And because this doesn’t just affect the child but the whole family, it has a huge psychological burden on families. It affects them in so many ways; parents having to miss work or take time off work to care for their child, other children in the family feeling neglected because their brother or sister needs so much attention.

In the MOMS Trial (a study that looked at prenatal – before birth – and postnatal – after birth – surgery to repair a defect in the spinal cord and showed that prenatal surgery had strong, long-term benefits and some risks) we showed that we could operate on the fetus before birth and help them. The fact that there was any improvement – doubling the number of kids who could walk from 20 to 40% showed this spinal cord injury is not a permanent situation and also showed there was some plasticity in the spinal cord, some potential for improvement. And so, the next question was can we do more. And that’s why we are trying this.

It’s pretty amazing. We are pretty excited.

The thing that makes surgeon-scientists feel so passionate is that we don’t just ask the fundamental questions, we ask questions in order to cure a problem in patients. I grew up in an environment where people were always asking “how can we do it better, how can we improve?”

There were many times of frustration, many times when cell types we explored and worked with didn’t work. But it’s the patients, seeing them, that keeps me motivated to do the science, to keep persevering. That’s the beauty of being a clinician-scientist. We can ask questions in a different way and look at data in a different way because we are driven by patient outcomes. So, whenever we get stuck in the rabbit hole of theoretical problems, we look to the patients for inspiration to keep going.

I am very cognizant of stirring up false hope, knowing that what occurs in animal models doesn’t always translate into humans. But we are optimistic, and I am anxious to get going.

 

71 for Proposition 71

Proposition 71 is the state ballot initiative that created California’s Stem Cell Agency. This month, the Agency reached another milestone when the 71st clinical trial was initiated in the CIRM Alpha Stem Cell Clinics (ASCC) Network. The ASCC Network deploys specialized teams of doctors, nurses and laboratory technicians to conduct stem cell clinical trials at leading California Medical Centers.

StateClinics_Image_CMYK

These teams work with academic and industry partners to support patient-centered for over 40 distinct diseases including:

  • Amyotrophic Lateral Sclerosis (ALS)
  • Brain Injury & Stroke
  • Cancer at Multiple Sites
  • Diabetes Type 1
  • Eye Disease / Blindness Heart Failure
  • HIV / AIDS
  • Kidney Failure
  • Severe Combined Immunodeficiency (SCID)
  • Sickle Cell Anemia
  • Spinal Cord Injury

These clinical trials have treated over 400 patients and counting. The Alpha Stem Cell Clinics are part of CIRM’s Strategic Infrastructure. The Strategic Infrastructure program which was developed to support the growth of stem cell / regenerative medicine in California. A comprehensive update of CIRM’s Infrastructure Program was provided to our Board, the ICOC.

CIRM’s infrastructure catalyzes stem cell / regenerative medicine by providing resources to all qualified researchers and organizations requiring specialized expertise. For example, the Alpha Clinics Network is supporting clinical trials from around the world.

Many of these trials are sponsored by commercial companies that have no CIRM funding. To date, the ASCC Network has over $27 million in contracts with outside sponsors. These contracts serve to leverage CIRMs investment and provide the Network’s medical centers with a diverse portfolio of clinical trials to address patients’’ unmet medical needs.

Alpha Clinics – Key Performance Metrics

  • 70+ Clinical Trials
  • 400+ Patients Treated
  • 40+ Disease Indications
  • Over $27 million in contracts with commercial sponsors

The CIRM Alpha Stem Cell Clinics and broader Infrastructure Programs are supporting stem cell research and regenerative medicine at every level, from laboratory research to product manufacturing to delivery to patients. This infrastructure has emerged to make California the world leader in regenerative medicine. It all started because California’s residents supported a ballot measure and today we have 71 clinical trials for 71.

 

 

Hits and Myths as people celebrate Stem Cell Awareness Day

UC Davis #1

Stem Cell Awareness Day at UC Davis

Every year, the second Wednesday in October is set aside as Stem Cell Awareness Day, a time to celebrate the progress being made in the field and to remind us of the challenges that lie ahead.

While the event began here in California in 2008, with then-Governor Arnold Schwarzenegger highlighting the work of CIRM, saying: ”The discoveries being made today in our Golden State will have a great impact on many around the world for generations to come.” It has since grown to become a global event.

Here in California, for example, UC Davis and the University of Southern California (USC) both held events to mark the day.

At UC Davis Jan Nolta, PhD., the Director of the Stem Cell Program, introduced a series of speakers who highlighted the terrific work being done at the university. Peter Belafsky talked about using stem cells to repair damaged trachea and to help people who are experiencing voice or swallowing disorders. Mark Lee highlighted the progress being made in using stem cells to repair hard-to-heal broken bones. Aijun Wang focused on some really exciting work that could one day lead to a therapy for spina bifida (including some ridiculously cute video of English bulldogs who are able to walk again because of this therapy.)

USC hosted 100 local high school students for a panel presentation and discussion about careers in stem cell research. The panel featured four scientists talking about their experience, why the students should think about a career in science and how to go about planning one. USC put together a terrific video of the researchers talking about their experiences, something that can help any student around the US consider becoming part of the future of stem cell research.

Similar events were held in other institutions around California. But the celebration wasn’t limited to the Golden State. At the Texas Heart Institute in Houston, Texas, they held an event to talk to the public about the clinical trials they are supporting using stem cells to help people suffering from heart failure or other heart-related issues.

RegMedNet

Finally, the UK-based RegMedNet, a community site that unites the diverse regenerative medicine community, marked the day by exploring some of the myths and misconceptions still surrounding stem cells and stem cell research.

You can read those here.

Every group takes a different approach to celebrating Stem Cell Awareness Day, but each is united by a common desire, to help people understand the progress being made in finding new treatments and even cures for people with unmet medical needs.

Starving stem cells of oxygen can help build stronger bones

Leach_Kent_BME.2012

J. Kent Leach: Photo courtesy UC Davis

We usually think that starving something of oxygen is going to make it weaker and maybe even kill it. But a new study by J. Kent Leach at UC Davis shows that instead of weakening bone defects, depriving them of oxygen might help boost their ability to create new bone or repair existing bone.

Leach says in the past the use of stem cells to repair damaged or defective bone had limited success because the stem cells often didn’t engraft in the bone or survive long if they did. That was because the cells were being placed in an environment that lacked oxygen (concentration levels in bone range from 3% to 8%) so the cells found it hard to survive.

However, studies in the lab had shown that if you preconditioned mesenchymal stem cells (MSCs), by exposing them to low oxygen levels before you placed them on the injury site, you helped prolong their viability. That was further enhanced by forming the MSCs into three dimensional clumps called spheroids.

Lightbulb goes off

In the  current study, published in Stem Cells, Leach says the earlier spheroid results  gave him an idea:

“We hypothesized that preconditioning MSCs in hypoxic (low oxygen) culture before spheroid formation would increase cell viability, proangiogenic potential (ability to create new blood vessels), and resultant bone repair compared with that of individual MSCs.”

So, the researchers placed one group of human MSCs, taken from bone marrow, in a dish with just 1% oxygen, and another identical group of MSCs in a dish with normal oxygen levels. After three days both groups were formed into spheroids and placed in an alginate hydrogel, a biopolymer derived from brown seaweed that is often used to build cellular cultures.

Seaweed

Brown seaweed

The team found that the oxygen-starved cells lasted longer than the ones left in normal oxygen, and the longer those cells were deprived of oxygen the better they did.

Theory is great, how does it work in practice?

Next was to see how those two groups did in actually repairing bones in rats. Leach says the results were encouraging:

“Once again, the oxygen-deprived, spheroid-containing gels induced significantly more bone healing than did gels containing either preconditioned individual MSCs or acellular gels.”

The team say this shows the use of these oxygen-starved cells could be an effective approach to repairing hard-to-heal bone injuries in people.

“Short‐term exposure to low oxygen primes MSCs for survival and initiates angiogenesis (the development of new blood vessels). Furthermore, these pathways are sustained through cell‐cell signaling following spheroid formation. Hypoxic (low oxygen) preconditioning of MSCs, in synergy with transplantation of cells as spheroids, should be considered for cell‐based therapies to promote cell survival, angiogenesis, and bone formation.”

CIRM & Dr. Leach

While CIRM did not fund this study we have invested more than $1.8 million in another study Dr. Leach is doing to develop a new kind of imaging technology that will help us see more clearly what is happening in bone and cartilage-targeted therapies.

In addition, back in March of 2012, Dr. Leach spoke to the CIRM Board about his work developing new approaches to growing bone.

 

UC Davis Stem Cell Director Jan Nolta Shares Her Thoughts on the Importance of Mentoring Young Scientists

Dr. Jan Nolta (UC Davis Health)

Jan Nolta is a scientific rockstar. She is a Professor at UC Davis and the Director of the Stem Cell Program at the UC Davis School of Medicine. Her lab’s research is dedicated to developing stem cell-based treatments for Huntington’s disease (HD). Jan is a tireless advocate for both stem cell and HD research and you’ll often see her tweeting away about the latest discoveries in the field to her followers.

What I admire most about Dr. Nolta is her dedication to educating and mentoring young students. Dr. Nolta helped write the grant that funded the CIRM Bridges master’s program at Sacramento State in 2009. Over the years, she has mentored many Bridges students (we blogged about one student earlier this year) and also high school students participating in CIRM’s SPARK high school internship program. Many of her young trainees have been accepted to prestigious colleges and universities and gone on to pursue exciting careers in STEM.

I reached out to Dr. Nolta and asked her to share her thoughts on the importance of mentoring young scientists and supporting their career ambitions. Below is a summary of our conversation. I hope her passion and devotion will inspire you to think about how you can get involved with student mentorship in your own career.


Describe your career path from student to professor.

I was an undergraduate student at Sacramento State University. I was a nerdy student and did research on sharks. I was planning to pursue a medical degree, but my mentor, Dr. Laurel Heffernan, encouraged me to consider science. I was flabbergasted at the suggestion and asked, “people pay you to do this stuff??” I didn’t know that you could be paid to do lab research. My life changed that day.

I got my PhD at the University of Southern California. I studied stem cell gene therapy under Don Kohn, who was a fabulous mentor. After that, I worked in LA for 15 years and then went back home to UC Davis in 2007 to direct their Stem Cell Program.

It was shortly after I got to Davis that I reconnected with my first mentor, Dr. Heffernan, and we wrote the CIRM Bridges grant. Davis has a large shared translational lab with seven principle investigators including myself and many of the Bridges students work there. Being a scientist can be stressful with grant deadlines and securing funding. Mentoring students is the best part of the job for me.

Why is it important to fund educational programs like Bridges and SPARK?

There is a serious shortage of well-trained specialists in regenerative medicine in all areas of the workforce. The field of regenerative medicine is still relatively new and there aren’t enough people with the required skills to develop and manufacture stem cell treatments. The CIRM Bridges program is critical because it trains students who will fill those key manufacturing and lab manager jobs. Our Bridges program at Sacramento State is a two-year master’s program in stem cell research and lab management. They are trained at the UC Davis Good Manufacturing Practice (GMP) training facility and learn how to make induced pluripotent stem cells (iPSCs) and other stem cell products. There aren’t that many programs like ours in the country and all of our students get competitive job offers after they complete our program.

We are equally passionate about our high school SPARK program. It’s important to capture students’ interests early whether they want to be a scientist or not. It’s important they get exposed to science as early as possible and even if they aren’t going to be a scientist or healthcare professional, it’s important that they know what it’s about. It’s inspiring how many of these students stay in STEM (Science, Technology, Engineering and Math) because of this unique SPARK experience.

Jan Nolta with the 2016 UC Davis SPARK students.

Can you share a student success story?

I’m so proud of Ranya Odeh. She was a student in our 2016 SPARK program who worked in my lab. Ranya received a prestigious scholarship to Stanford largely due to her participation in the CIRM SPARK program. I got to watch her open the letter on Instagram, and it was a really incredible experience to share that part of her life.

I’m also very proud of our former Bridges student Jasmine Carter. She was a mentor to one of our SPARK students Yasmine this past summer. She was an excellent role model and her passion for teaching and research was an inspiration to all of us. Jasmine was hoping to get into graduate school at UC Davis this fall. She not only was accepted into the Neuroscience Graduate Program, but she also received a prestigious first year program fellowship!

UC Davis Professors Jan Nolta and Kyle Fink with CIRM Bridges student Jasmine Carter

[Side note: We’ve featured Ranya and Jasmine previously on the Stem Cellar and you can read about their experiences here and here.]

Why is mentoring important for young students?

I can definitely relate to the importance of having a mentor. I was raised by a single mom, and without scholarships and great mentors, there’s no way I would be where I am today. I’m always happy to help other students who think maybe they can’t do science because of money, or because they think that other people know more than they do or are better trained. Everybody who wants to work hard and has a passion for science deserves a chance to shine. I think these CIRM educational programs really help the students see that they can be what they dream they can be.

What are your favorite things about being a mentor?

Everyday our lab is full of students, science, laughter and fun. I love coming in to the lab. Our young people bring new ideas, energy and great spirit to our team. I think every team should have young trainees and high school kids working with them because they see things in a different way.

Do you have advice for mentoring young scientists?

You can sum it up in one word: Listen. Ask them right away what their dreams are, where do they imagine themselves in the future, and how can you help them get there. Encourage them to always ask questions and let them know that they aren’t bothering you when they do. I also let my students know that I’m happy to be helping them and that the experience is rewarding for me as well.

So many students are shy when they first start in the lab and don’t get all that they can out of the experience. I always tell my students of any age: what you really want to do is try in life. Follow your tennis ball. Like when a golden retriever sees a tennis ball going by, everything else becomes secondary and they follow that ball. You need to find what that tennis ball is for you and then just try to follow it.

What advice can you give to students who want to be scientific professors or researchers?

Find somebody who is a good mentor and cares about you. Don’t go into a lab where the Principle Investigator (PI) is not there most of the time. You will get a lot more out of the experience if you can get input from the PI.

A good mentor is more present in the lab and will take you to meetings and introduce you to people. I find that often students read papers from well-established scientists, and they think that their positions are unattainable. But if they can meet them in person at a conference or a lecture, they will realize that all of the established scientists are people too. I want young students to know that they can do it too and these careers are attainable for anybody.