News archive

Cardiogenic growth factors play important roles in heart development and in a new study published in the scientific paper Nature Communications from researchers at Karolinska Institutet shows how stem cell therapeutics and mRNA technology are beginning to converge offering major improvements in vascularization, survival, expansion, differentiation, and ultimately the function of human stem cell grafts.

The 5D Heart Patch Project, led by Prof Kenneth Chien, has identified human ventricular progenitor (HVP) cells that can create self-assembling heart grafts in vivo. The research has the potential to offer hope to millions of people suffering from heart failure.

Researchers at Karolinska Institutet, Karolinska University Hospital and Cellevate AB, have received almost 5 million SEK from Vinnova, to investigate how stem cells interact with their environment. The goal is to develop more effective production of stem cell therapies, and eventually contribute to better treatment of public diseases such as heart failure and diabetes.

Four research projects coordinated from Karolinska Institutet have been awarded project grants by Knut and Alice Wallenberg Foundation (KAW) in 2022. This means that, over SEK 135 million are allocated to KI research in the fields of immunology, neuroscience, and stem cell biology.

Researchers at Karolinska Institutet, Germany’s Technical University of Munich (TUM) and AstraZeneca, among others, have identified a unique therapeutic approach with the potential to restore heart function following a heart attack. The new findings rely on so-called human ventricular progenitor (HVP) cells to promote novel heart tissue and reduce scarring after injury. This pre-clinical study is published in the journal Nature Cell Biology.

A study involving researchers at Karolinska Institutet and IMBA – Institute of Molecular Biotechnology of the Austrian Academy of Sciences – demonstrates how zika and herpes viruses can lead to brain malformations during early pregnancy. The researchers used 3D models of human brains to study which mechanisms are involved in virus-induced microcephaly, a condition where babies are born with smaller-than-usual heads. The results are published in the journal Cell Stem Cell.

Stem cell research is the prerequisite for regenerative medicine, which with the help of the body's cells recreates and heals important organs. Now, researchers at Karolinska Institutet, SickKids in Canada and KU Leuven in Belgium have found a method for defining the most general type of stem cells, that can develop into all cell types in the body. The study of totipotent stem cells in mice has been published in Nature Cell Biology.

A study lead by KI researcher and SciLifeLab Fellow Simon Elsässer elucidates a new flavour of heterochromatin, used by embryonic stem cells to silence ‘parasitic’ DNA-elements within the context of their highly dynamic pluripotent chromatin. The study was recently published in Nature Communications.

Spinal cord injury often leads to permanent functional impairment. In a new study published in the journal Science researchers at Karolinska Institutet show that it is possible to stimulate stem cells in the mouse spinal cord to form large amounts of new oligodendrocytes, cells that are essential to the ability of neurons to transmit signals, and thus to help repair the spinal cord after injury.

Karolinska Institutet and St. Erik Eye Hospital have entered into a collaboration with Novo Nordisk A/S to develop a new treatment for age-related macular degeneration. Novo Nordisk A/S will provide support and SEK 48 million in funding to enable a phase 1 clinical trial where new retinal cells generated from embryonic stem cells will be transplanted into patients. The aim is to develop a completely new cell therapy for this common but currently incurable eye disease.

Researchers from Karolinska Institutet discovered that the retinoblastoma associated protein RB and the mitochondrial ribosomal protein S18-2 (MRPS18-2) play the essential roles in homeostasis of cell stemness. Rb1-/- mouse primary cells expressing both, S18-2 and RB exhibited a stem cell phenotype. Downregulation of S18-2 and RB in human mesenchymal stem cells resulted in decreased expression of stem cell-related genes. Loss of the S18-2 protein resulted in embryonic lethality in zebrafish.

Researchers at Karolinska Institutet and St Erik Eye Hospital in Sweden have discovered a way to refine the production of retinal cells from embryonic stem cells for treating blindness in the elderly. Using the CRISPR/Cas9 gene editing, they have also managed to modify the cells so that they can hide from the immune system to prevent rejection. The studies are published in the scientific journals Nature Communications and Stem Cell Reports.

We are born with all the hair follicles that we will ever have in our lives, because after birth the skin loses the ability to create new hair follicles. If our skin is severely damaged it cannot form new hair follicles or associated sebaceous glands essential for keeping the skin moist. But now researchers at the Karolinska Institutet have revealed that controlled activation of the so-called Hedgehog-signaling pathway leads to new formation of hair follicles and hair in mice.

A new method, developed by Banushree Kumar and Simon Elsässer at Karolinska Institutet, produces quantitative maps for modifications of so-called histone proteins that package the DNA molecules in every eukaryotic cell. The study, published in the journal Cell Reports, describes new properties of naïve pluripotent stem cells.

As we grow older, our muscular function declines. A new study by researchers at Karolinska Institutet shows how an unexpectedly high number of mutations in the stem cells of muscles impair cell regeneration. This discovery may result in new medication to build stronger muscles even when in old age. The study is published in Nature Communications.

Researchers from Karolinska Institutet and KTH Royal Institute of Technology have developed a new cell model for human brain helper cells known as astrocytes. The model could potentially be used in large-scale drug screening in the search for treatments for neurological diseases such as Alzheimer’s. The research is published in the scientific journal Stem Cell Reports.

By reprogramming skin cells into nerve cells, researchers at Karolinska Institutet are creating cell models of the human brain. In a new study published in Molecular Psychiatry the researchers describe how cells from patients with the severe developmental disease lissencephaly differ from healthy cells. The method can provide vital new knowledge on difficult-to-study congenital diseases.