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Home » Topics » Science » Stem cells

Stem cells
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Thymus
Immune

The human thymus has multipotent stem cells with the capacity to maintain it

Sep. 7, 2023
By Mar de Miguel
It was believed that they did not exist, but they are a reality. Scientists at the Francis Crick Institute in London have discovered stem cells in the thymus for the first time. The last organ to have its role described in humans still has properties that researchers could explore to prevent the decline of the immune system throughout life.
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Fluorescence microscopy image of mitochondria
Hematologic

Mitochondrial modulator rejuvenates blood stem cells

Sep. 4, 2023
By Nuala Moran
Researchers have demonstrated that inhibiting mitophagy in ‘old’ hematopoietic stem cells (HSCs) completely restored their blood reconstitution capabilities, raising the prospect of addressing the age-related weakening of the immune system that stems from HSCs deteriorating over time.
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Lung illustration

Damaged lungs can be renewed by engrafting stem cells

Aug. 28, 2023
By Subhasree Nag
One of the key advances in regenerative medicine has been the engraftment of external epithelial stem cells to supplement or replace damaged native cells. However, the difficulty in engrafting internal tissues has hindered the long-term rescue of diseased internal epithelia, such as those in the respiratory airways.
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Lung illustration
Respiratory

Damaged lungs can be renewed by engrafting stem cells

Aug. 28, 2023
By Subhasree Nag
One of the key advances in regenerative medicine has been the engraftment of external epithelial stem cells to supplement or replace damaged native cells. However, the difficulty in engrafting internal tissues has hindered the long-term rescue of diseased internal epithelia, such as those in the respiratory airways.
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Coronavirus and DNA
Infection

Severe COVID-19 leaves epigenetic immune system memory

Aug. 22, 2023
By Mar de Miguel
A study from Weill Cornell Medicine and The Jackson Laboratory has described the epigenetic mark SARS-CoV-2 left on immune system stem cells in the most severe cases of COVID-19 early in the pandemic, before the development of vaccines. In their work published in Cell on Aug. 18, 2023, the researchers presented a new methodology to analyze the epigenetic changes in monocytes and circulating hematopoietic stem and progenitor cells (HSPCs) that give rise to monocytes. That allowed corresponding author Steven Josefowicz and his colleagues to see if there were already changes induced by COVID-19 before HSPCs differentiated into monocytes.
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Cancer

H. pylori induces stomach cancer by disrupting stem cell marching orders

July 28, 2023
By Mar de Miguel
Colonization of the stomach by the bacterium Helicobacter pylori can cause gastric cancer by secreting the CagA oncoprotein. Now, a Japanese laboratory has discovered that CagA disrupted Wnt/PCP signaling and altered the polarity in which the squamous cells of the developing gastric epithelium are arranged, causing the hyperproliferation of the stem cells.
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Cancer stem cells
Cancer

IPSirius targets cancer stem cells with iPSC-based vaccine

July 5, 2023
By Cormac Sheridan
IPSirius SAS, an early stage French immuno-oncology firm, hopes to obtain a clinical trial authorization from the U.K.’s Medicines and Healthcare Regulatory Products Agency next year, to enable it to move its novel therapeutic cancer vaccine into a first-in-human trial in patients with non-small-cell lung cancer.
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Day 4 embryoid showing an inner epiblast-like domain that has apico-basal polarity
Drug Design, Drug Delivery & Technologies

New human embryonic models bring hope for insights, but also lots of brouhaha

June 28, 2023
By Mar de Miguel
The development of an embryo in its early stages involves a series of processes in which cells interact and organize to form tissues. In humans, these stages are studied with animal models, stem cells and cell aggregates that mimic natural development phases, or with human embryos, depending on their availability and a strict protocol. Now, in back-to-back papers published online in Nature, scientists from Yale University and the University of Cambridge have two new embryonic models formed from human stem cells to study development after embryo implantation in the uterus.
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Cardiovascular

Advances in regenerative medicine for cardiovascular repair

June 23, 2023
By Mar de Miguel
Over the past decade there has been much research into the use of induced pluripotent stem cells (iPSCs) as a cell therapy to regenerate tissue and treat heart disease. Now, one researcher has narrowed the focus down to treating heart disease not with whole cells, but with mitochondria derived from iPSCs. Gentaro Ikeda, a researcher at the Department of Medicine at Stanford University, has worked on generating extracellular vesicles (EVs) containing mitochondria from pluripotent stem cell-derived cardiomyocytes and administering these to restore the functionality of the myocardium in a porcine model of an infarct.
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Drug Design, Drug Delivery & Technologies

Molecular changes reveal distinct phases in iPSCs that explain their pluripotency

June 21, 2023
By Mar de Miguel
Several developmental biology and regenerative medicine laboratories that use cellular reprogramming techniques presented their latest results on the differences in the states of induced pluripotent stem cells (iPSCs) during a Plenary Session on “Epigenetic regulation of distinct cell states” at the Annual Meeting of the International Society for Stem Cell Research (ISSCR), in Boston from June 14 to 17, 2023.
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