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Twenty years of revolutionary stem cell research

Nerve cells. photo
Nerve cells created from stem cells. Photo: Janko Kajtez /Parmar Group

Thanks to stem cell research, we now understand much more about the earliest stages of human development and what underlies many of our diseases. In recent years, the field has been revolutionised by several discoveries that have completely changed the landscape of stem cell research.

Since its establishment as a strategic research centre, the Lund Stem Cell Center has become one of the strongest research environments in Europe with over 40 research teams. The aim is to develop life-changing therapies based on stem cells for patients with serious and incurable diseases. This year the centre celebrates its twenty-year anniversary.

Man with a scarf. photo
Zaal Kokaia, former director of the Lund Stem Cell Center. Photo: Åsa Hansdotter

“In recent years, we have focused on recruiting young, international researchers who are at the beginning of their careers. Research has also become more multidisciplinary, and because technology has developed so robustly, the centre has become a platform that offers technical facilities for top-level cutting-edge studies,” says Zaal Kokaia, former director of the Lund Stem Cell Center and one of the researchers who has been involved from the start.

Tough task to develop therapies

But the task of developing stem cell therapies turned out to be tougher than first thought. Only this year – just in time for the anniversary – two therapies can be tested in real-life, in clinical trials. These are stem cell transplantations for Parkinson’s disease and gene therapy for Diamond-Blackfan anaemia – a congenital and rare blood disorder that causes a shortage of red blood cells.

“When the Stem Cell Center was established, it was difficult to convince commercial companies to take the research findings further to clinical trials. However, it is very important that our research ultimately leads to new treatments in humans. After all, that is the goal of our research,” says Johan Jakobsson, current director of the Lund Stem Cell Center.

The importance of partnerships

Over the years, much has been learned about the importance of establishing partnerships with both private stakeholders and public healthcare. The research field has matured and is moving towards new procedures and checks across the entire research chain, with the establishment of a large number of start-up companies within Sweden’s borders.

A number of revolutionary discoveries have also made the development of new advanced therapy medicinal products (ATMPs) possible. These are not the classic pills that you pick up at the pharmacy, but drugs based on cells, genes or tissues.

Man with glasses. Photo
Johan Jakobsson, current director of the Lund Stem Cell Center. Photo: Johan Persson

ATMP in focus

“There has been a huge change in recent years. With many pharmaceutical companies now focusing on ATMPs, there is money to develop new therapies for conditions for which there was previously no treatment” says Johan Jakobsson and continues.

“The next step is that the regulatory framework needs to be adapted to a whole new arena of therapies, and bridges need to be built from all sides – from researchers and healthcare providers to politicians, companies and pharmaceutical companies, so that interactions can take place.”

 

What is a stem cell?

Stem cells are the origins of all cells in our bodies. They can divide an unlimited number of times and have the potential to develop into any type of cell in the body. They can be frozen, thawed and grown over a very long period of time.

There are different types of stem cells:Embryonic stem cells are found in the foetus and are pluripotent. This means that they give rise to all future tissues and can become any organ in the body. They can even create a complete individual. 

Adult stem cells are found in the adult human body – mainly in bone marrow but also in other tissues such as skin, the liver and adipose tissue. Their main task is to maintain and repair damaged cells.

Induced pluripotent stem cells (iPS cells) are cells that were previously “normal” tissue cells but have been reprogrammed to regress developmentally and regain their stem cell properties. From being, for example, a skin cell, the cell is now pluripotent again and can mature into any cell in the body.

Four discoveries that have changed the face of stem cell research

 

1. Induced pluripotent stem cells (iPS cells)

By taking a piece of skin, for example, and adding four genes, the skin cell can be made to regress into an induced pluripotent stem cell, an iPS cell. Once the skin cell has become an iPS cell, scientists can then use different molecules and proteins to direct the cell’s development to become any cell in the body.

2. CRISPR-Cas9
CRISPR-Cas9 is a pair of gene scissors that can be used as a method of genetic modification. The gene scissors are naturally present in the immune systems of some bacteria and destroy the DNA chain of invaders by cutting it. Researchers are using the scissors to cut and paste genes, opening up the possibility of curing serious genetic diseases.

3. Sequencing

The most common sequencing method is Next Generation Sequencing (NGS). NGS can quickly determine the genetic code of the entire genome and find out the order of the DNA. By then looking at differences against a reference material, it is possible to identify any changes and genetic abnormalities in a person. Technological advances have meant that this can now be done without the huge initial costs.

4. Organoids

Organoids are mini models of human organs created artificially in a laboratory. They are made up of stem cells that are grown into specialised cells for various simplified organs. Organoids enable the detailed study of tissue regeneration, bringing stem cell research a step closer to future therapies.

Tidningsomslag.

About LUM

The first edition of Lund University Magazine – LUM – was published 1968. Today, the magazine reaches all employees and also people outside the university. The magazine is published six times per year. Editor Jan Olsson.

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Jan Olsson


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Minna Wallén-Widung

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