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Scrutinizing Blood

James Heath and Leroy Hood's microfluidic chip to test blood for cancer proteins is under development, reports Technology Review. In the chip, blood droplets enter a microscale channel that then narrow so that only serum can pass through. These narrower channels are lined with DNA bound to antibodies to capture proteins and that fluoresce. That fluorescence can then be read under a microscope or by a scanner and the amount of light can indicate the concentration of that protein. Heath and Hood describe their work in Nature Biotechnology.

Meanwhile, researchers from Massachusetts General Hospital report in Nature Cell Biology that microvesicles released from tumors, particularly gliablastomas, can be found circling in a cancer patient's blood. They think that the vesicles can be used as biomarkers for treatment progression, tumor recurrence, and to individualize treatment.

The Scan

Could Cost Billions

NBC News reports that the new Alzheimer's disease drug from Biogen could cost Medicare in the US billions of dollars.

Not Quite Sent

The Biden Administration likely won't meet its goal of sending 80 million SARS-CoV-2 vaccine doses abroad by the end of the month, according to the Washington Post.

DTC Regulation Proposals

A new report calls on UK policymakers to review direct-to-consumer genetic testing regulations, the Independent reports.

PNAS Papers on Mosquito MicroRNAs, Acute Kidney Injury, Trichothiodystrophy

In PNAS this week: microRNAs involved in Aedes aegypti reproduction, proximal tubule cell response to kidney injury, and more.