Stanford scientists transplanted human brain tissue into mice missing most of their cortex; within months, it grew to occupy more than 90% of the space
GS3Economy · S&T · Environment · Security· Biotechnology & health research· Prelims·
Chimeric models in neurobiology: a GS3 Science & Technology case study on bioethics and neural integration.
Why in news
Stanford scientists led by Sergiu Pasca successfully transplanted lab-grown human brain tissue into mice lacking most of their cerebral cortex to study human neuron development.
Background
The study, published in Nature on September 16, showed human tissue expanded to occupy over 90% of the cortical space in mice. The transplanted tissue formed functional connections with the mouse's brain and spinal cord.
Facts for Prelims
- S&TStanford University researchers transplanted lab-grown human brain tissue into mice.
- FactThe human tissue expanded to occupy more than 90% of the cortical space in the mice.
- S&TThe transplanted tissue formed working connections with both the mouse brain and spinal cord.
- S&TThe research aims to provide insights into neurological conditions such as autism and epilepsy.
Prelims practice question
What specific neurological conditions does the research aim to provide insights into?
- (a)Multiple Sclerosis and ALS
- (b)Stroke and Dementia
- (c)Autism and epilepsy
- (d)Alzheimer's and Parkinson's
Show answer
Answer: (c) Autism and epilepsy — The research aims to provide insights into neurological conditions such as autism and epilepsy.
For Mains
Q. Discuss the ethical and scientific implications of using human-animal chimeric models in neurobiology research to understand complex neurological disorders.
Dimensions to cover in your answer
- Ethical dilemma: Moral status of chimeric organisms with integrated human neural tissue
- Scientific utility: Real-time observation of human neuron development in a living systemic environment
- Regulatory gap: Lack of specific guidelines for human-animal neural integration research
Keywords: Chimeric models · Neurobiology · Neural integration · Bioethics · Human-animal research
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