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2024-01-11 08:59:16 | onclick: | Fetal brain tissue produces 3D 'mini' organoids

An image of the brain organoids of the entire human fetus.Stem cells are labeled with SOX2 (gray), and neuronal cells (TUJ1) are color-coded based on depth from pink to yellow.
Dutch scientists have developed a 3D microorgan that can self-organize in vitro using human fetal brain tissue, the journal Cell reported on the 8th.These lab-grown organoids open up entirely new avenues for studying how the brain develops.They also provide valuable tools for studying the development and treatment of brain development-related diseases, including brain tumors.
Previously, brain organoids were grown in laboratories.Now, scientists at the Princess Masima Children's Oncology Medical Center and the Hubrecht Institute in the Netherlands have developed brain organoids directly from human fetal brain tissue.New research has found that using small pieces of fetal brain tissue instead of individual cells is critical to producing a "mini" brain.These small pieces of fetal brain tissue can self-organize into organisms.
These brain organoids are about the size of a grain of rice.Its composition is complex and contains many different types of brain cells.This brain organoid contains many outer radial glial cells, which highlights the similarities between organoids and the human brain.
The entire brain tissue also produces proteins that make up the extracellular matrix.The team believes that these proteins may be responsible for the self-organization of fragments of brain tissue into 3D brain structures.
The study found that tissue-derived organoids retain a variety of features in specific areas of the brain.They respond to signaling molecules known to play an important role in brain development.This finding suggests that this organoid could play an important role in revealing complex molecular networks that guide brain development.
The team also looked at the organoid's potential in simulating brain cancer.They used CRISPR-Cas9 gene editing technology to cause TP53 gene deletion in a small fraction of organoids.After three months, cells lacking the TP53 gene gained a growth advantage, which is typical of cancer cells.Experiments have shown the potential for organoids to link certain drugs to specific gene mutations in cancer drug research.
These tissue-derived organoids continued to grow in petri dishes for more than six months.The researchers had them reproduce and allowed them to grow many similar organoids from a tissue sample.

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