Sam's News — health — 2026-10-06¶

Science¶

8.5 Optogenetics: Nobel Prize-Winning Technique for Light-Controlled Neural Stimulation¶

Optogenetics, a breakthrough technique enabling scientists to control neurons with light, offers potential treatments for dementia, depression, and blindness.

2026 Nobel Prize recipients: Karl Deisseroth, Peter Hegemann, Georg Nagel
Optogenetics: uses light to control nerve cell activity
Originated from research on Chlamydomonas algae attracted to light
Hijacks ion channels to activate/deactivate neurons via light stimulation
Overcomes limitations of genetic deletion and physical brain damage methods
Allows activation and shutdown of neurons marked by individual gene activity
Three recipients: Deisseroth (Stanford), Hegemann (Humboldt), Nagel (Würzburg)
Optogenetics uses light to control individual neurons within milliseconds
Potential applications: blindness restoration, depression, Parkinson's, epilepsy, dementia
Prize worth 12 million Swedish kronor (~€1M or $1.2M)
Awards presentation December 10, 2026 in Stockholm
Discovered channelrhodopsin: light-sensitive protein from algae
Enables neuron control within milliseconds using blue light pulses
Maps neural circuits governing behaviors, memories, feelings, disease states
Deisseroth HHMI Investigator since 2014; 36th current/alumni HHMI Nobel laureate
Optogenetics now used worldwide; transformed neuroscience research
Karl Deisseroth, Peter Hegemann, Georg Nagel awarded 2026 Nobel Prize in Physiology or Medicine
Hagemann and Nagel discovered channelrhodopsin light-gated ion channels; Deisseroth developed practical optogenetics tool
Deisseroth introduced channelrhodopsin-2 into rat nerve cells (2005), demonstrated control in mouse brains (2007)
Optogenetics used to identify neural circuits controlling pain, social behavior, thirst, memory, psychiatric/neurological disorders
Medical applications under investigation: restoring vision in visual impairment, improving cochlear implant precision
Deisseroth: born 1971 Boston, Stanford professor bioengineering/psychiatry, Howard Hughes Medical Institute

Sources: Phys.org RSS, Times of India AI Web Searched Update to: Optogenetics breakthrough earns physiology Nobel Prize

Health¶

7 Pulse oximeters show accuracy shift with racial disparities¶

A Johns Hopkins Hospital retrospective study found that pulse oximeters shifted from overestimating to underestimating blood oxygen levels, with greater inaccuracy in patients of color. The underlying causes remain unexplained despite year-over-year changes in device behavior.

Pulse oximeters shifted from overestimation to underestimation at higher oxygen levels
Inaccuracies worse in patients of color than other patients
Behavior changed year-over-year without clear explanation
Masimo (manufacturer) unaware of sensor, software, or manufacturing changes that would explain results
Multiple factors affect readings: sensor type, placement, signal quality, perfusion

Sources: STAT AI Web Searched, STAT News RSS

6.5 FDA should reject ineffective multicancer screening test, expert argues¶

A prominent health researcher argues the FDA should not approve Grail's multicancer screening test due to ineffectiveness and potential harm from false positives.

Sources: STAT News RSS

6 Longevity clinics surge at nonprofit hospitals with high costs¶

Major nonprofit hospitals are launching longevity clinics offering personalized health advice and advanced tests, with annual costs reaching $45,000.

Sources: STAT News RSS

5.5 Timing considerations for flu vaccination¶

Health guidance on optimal timing for receiving the seasonal flu vaccine.

Sources: STAT News RSS

5.5 Doctor warns AI tool adoption inflates healthcare costs¶

A physician cautions that AI-assisted documentation can lead to inflated hospital bills despite honest medical coding practices.

Sources: STAT News RSS