Innocuous pressure sensation requires A-type afferents but not functional Rho Iota Epsilon Zeta Omicron 2 channels in humans

Case, Laura K.NIH, MD 20892 USA; Univ Calif San Diego, CA 92103 USA (författare)

Funding Agencies|National Institutes of Health (NIH)United States Department of Health & Human ServicesNational Institutes of Health (NIH) - USA
The sensation of pressure allows us to feel sustained compression and body strain. While our understanding of cutaneous touch has grown significantly in recent years, how deep tissue sensations are detected remains less clear. Here, we use quantitative sensory evaluations of patients with rare sensory disorders, as well as nerve blocks in typical individuals, to probe the neural and genetic mechanisms for detecting non-painful pressure. We show that the ability to perceive innocuous pressures is lost when myelinated fiber function is experimentally blocked in healthy volunteers and that two patients lacking A beta fibers are strikingly unable to feel innocuous pressures at all. We find that seven individuals with inherited mutations in the mechanoreceptor PIEZO2 gene, who have major deficits in touch and proprioception, are nearly as good at sensing pressure as healthy control subjects. Together, these data support a role for A beta afferents in pressure sensation and suggest the existence of an unknown molecular pathway for its detection. The mechanisms underlying deep pressure sensing are not fully understood. Here the authors demonstrate that while two individuals lacking A beta fibers demonstrate impaired deep pressure sensing, seven individuals with PIEZO2 loss of function mutations display normal deep pressure responses.

Liljencrantz, JaquetteNIH, MD 20892 USA; Univ Gothenburg, Sweden (författare)
Madian, NicholasNIH, MD 20892 USA (författare)
Necaise, AaronNIH, MD 20892 USA (författare)
Tubbs, JustinNIH, MD 20892 USA (författare)
McCall, MicaelaNIH, MD 20892 USA (författare)
Bradson, Megan L.NIH, MD 20892 USA (författare)
Szczot, MarcinNIH, MD 20892 USA (författare)
Pitcher, Mark H.NIH, MD 20892 USA (författare)
Ghitani, NimaNIH, MD 20892 USA (författare)
Frangos, EleniNIH, MD 20892 USA (författare)
Cole, JonathanBournemouth Univ, England (författare)
Bharucha-Goebel, DianaNINDS, MD 20892 USA (författare)
Saade, DimahNINDS, MD 20892 USA (författare)
Ogata, TracyNINDS, MD 20892 USA (författare)
Donkervoort, SandraNINDS, MD 20892 USA (författare)
Foley, A. ReghanNINDS, MD 20892 USA (författare)
Bonnemann, Carsten G.NINDS, MD 20892 USA (författare)
Olausson, HåkanLinköpings universitet,Centrum för social och affektiv neurovetenskap,Medicinska fakulteten,Region Östergötland, Neurofysiologiska kliniken US(Swepub:liu)hakol42 (författare)
Bushnell, M. CatherineNIH, MD 20892 USA (författare)
Chesler, Alexander T.NIH, MD 20892 USA; NINDS, MD 20892 USA (författare)
NIH, MD 20892 USA; Univ Calif San Diego, CA 92103 USANIH, MD 20892 USA; Univ Gothenburg, Sweden (creator_code:org_t)

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MEDICIN OCH HÄLSOVETENSKAP: MEDICIN OCH HÄLS ...; och Klinisk medicin; och Neurologi

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