"Alien-cortical mice" with 4 million human neurons show improved maze navigation
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Chimeric models and human organoids: a GS3 Science & Technology and Ethics case study.
Why in news
Stanford University researchers successfully integrated 4 million human neurons into genetically modified mice to study neural circuits and brain disorders.
Background
Researchers implanted human organoids into 25 out of 29 genetically modified mice. The study, published in Nature, observed that these 'alien-cortical mice' exhibited improved maze navigation compared to mice without human tissue.
Facts for Prelims
- FactThe experiment successfully integrated approximately 4 million human neurons into the mice.
- BodyStanford University conducted the research and published the findings in the journal Nature.
Prelims practice question
In which scientific journal were the findings regarding the integration of human neurons into mice published?
- (a)The Lancet
- (b)Science
- (c)Nature
- (d)Cell
Show answer
Answer: (c) Nature — The note states that the study was published in the journal Nature.
For Mains
Q. Discuss the ethical and scientific implications of using human organoids and neural integration in animal models to study neurodegenerative disorders.
Dimensions to cover in your answer
- Ethical dilemma: Balancing the advancement of neuro-medicine with the moral status of human-animal chimeric tissues
- Research utility: Providing a scalable model to study human-specific neural circuits for schizophrenia and dementia
Keywords: Neural circuits · Human organoids · Neurodegenerative disorders · Chimeric models · Biotechnology
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