While acknowledging the successful implantation of human neural organoids into partially scooped-out rodent skulls, a new peer-reviewed paper suggests the resulting creatures’ sudden awareness of their own mortality might compromise the study’s double-blind methodology. Scientists emphasize that further validation is required before the protocol can be deemed statistically reliable.
A recent study detailed by STAT+ and published in JAMA outlines a novel procedure in which scientists successfully removed half of a mouse’s brain and replaced it with lab-grown human cerebral tissue. However, authors of the paper were quick to note that the resulting behavioral changes—which included the mice weeping silently in the corners of their enclosures and attempting to spell out pleas for death using wood shavings—are merely associated with the human tissue, rather than definitively caused by it.
The group of 40 experimental subjects demonstrated a marked increase in complex problem-solving alongside a statistically significant spike in night terrors. Lead investigators stressed that because the animals’ apparent feelings of being trapped in a Kafkaesque nightmare of flesh cannot be independently verified, observers must resist the urge to extrapolate the findings to broader mammalian populations.
While the preliminary data is robust, we must remember that an n=40 sample of rodents grappling with the sudden, crushing weight of human consciousness is simply too small to inform definitive clinical guidelines.
Regulatory bodies have largely echoed this cautious sentiment. The FDA recently declined to fast-track the next phase of the research, citing a lack of longitudinal follow-up on whether the mice’s newfound capacity for complex human grief might artificially inflate their resting heart rates and skew subsequent cardiovascular measurements. Furthermore, the agency noted that the researchers failed to properly disclose a minor financial conflict of interest regarding the biomedical startup that manufactured the lab-grown frontal lobes.
For now, medical professionals advise the public not to attempt hollowing out household pets to insert stem cells at home. Until a larger, randomized, placebo-controlled trial can definitively rule out the presence of a trapped human soul, the scientific community maintains that the therapeutic benefits of the half-human mouse remain purely theoretical.