Abstract:
:Neurochemical dysregulation underlies many pathologies and can be monitored by measuring the composition of brain interstitial fluid (ISF). Existing in vivo tools for sampling ISF do not enable measuring large rare molecules, such as proteins and neuropeptides, and thus cannot generate a complete picture of the neurochemical connectome. Our micro-invasive platform, composed of a nanofluidic pump coupled to a membrane-free probe, enables sampling multiple neural biomarkers in parallel. This platform outperforms the state of the art in low-flow pumps by offering low volume control (single stroke volumes, <3 nl) and bidirectional fluid flow (<100 nl/min) with negligible dead volume (<30 nl) and has been validated in vitro, ex vivo, and in vivo in rodents. ISF samples (<1.5 μL) can be processed via liquid chromatography-tandem mass spectrometry. These label-free liquid biopsies of the brain could yield a deeper understanding of the onset, mechanism, and progression of diverse neural pathologies.
journal_name
Sci Advjournal_title
Science advancesauthors
Raman R,Rousseau EB,Wade M,Tong A,Cotler MJ,Kuang J,Lugo AA,Zhang E,Graybiel AM,White FM,Langer R,Cima MJdoi
10.1126/sciadv.abb0657subject
Has Abstractpub_date
2020-09-25 00:00:00issue
39issn
2375-2548pii
6/39/eabb0657journal_volume
6pub_type
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