Neuromodulation techniques
The subject matter of the present disclosure generally relates to techniques for neuromodulation of a tissue (e.g., an organ) that include applying energy (e.g., ultrasound energy) into the tissue to cause altered activity at a synapse between a neuron and a non-neuronal cell. In one embodiment, the energy is applied to cause competing or opposing effects for bi-directional control of physiological processes.
1 . A modulation system comprising:
a non-invasive ultrasound probe, configured to emit one or more imaging beams and one or more therapy beams using the same or different transducers; and
a controller configured to:
direct the non-invasive ultrasound probe on a first region of interest of a first tissue comprising a liver or sub-region of the liver;
adjustably control the non-invasive ultrasound probe to apply a first energy dose to the liver or the sub-region of the liver, wherein applying the first energy dose to the liver or the sub-region of the liver decreases circulating glucose concentration;
direct the non-invasive ultrasound probe or a different non-invasive ultrasound probe on a second region of interest comprising a gastrointestinal tissue; and
adjustably control the non-invasive ultrasound probe or the different non-invasive ultrasound probe to apply a second energy dose to the gastrointestinal tissue, wherein applying the second energy dose to the gastrointestinal tissue decreases circulating insulin concentration.
2 . The modulation system of claim 1 , wherein application of the first energy dose to the first region of interest improves insulin sensitivity via a first molecular pathway.
3 . The modulation system of claim 2 , wherein application of the second energy dose to the second region of interest improves insulin sensitivity via a second molecular pathway.
4 . The modulation system of claim 1 , further comprising adjusting an activation time and/or duration of one or both of applying the first energy dose or the second energy dose.
5 . The modulation system of claim 1 , wherein applying the first energy dose to the liver or the sub-region of the liver and the second energy dose to the gastrointestinal tissue regulates a glucose concentration within a predefined range.
6 . The modulation system of claim 1 , wherein insulin sensitivity is mediated via one of a plurality of molecules of interest measured as a biomarker profile and wherein the biomarker profile characterizes expected concentrations or changes in concentration of the plurality of molecules of interest in response to applying the first energy dose to the liver or the sub-region of the liver and the second energy dose to the gastrointestinal tissue.
7 . The modulation system of claim 6 , wherein the plurality of molecules comprises two or more of glucose, insulin, glucagon, glucagon-like peptide 1, glucose transporter 2, norepinephrine, acetylcholine, protein kinase B, insulin receptor substrate 1, proopiomelanocortin or neuropeptide Y.
8 . A method of changing insulin sensitivity of a subject, comprising:
applying a first ultrasound therapy beam to a liver or sub-region of the liver to stimulate a first insulin sensitivity regulating molecular pathway distal from the liver, wherein the first ultrasound therapy beam to the liver or the sub-region of the liver decreases circulating glucose concentration; and
applying a second ultrasound therapy beam to a gastrointestinal tissue to stimulate a second insulin sensitivity regulating molecular pathway, wherein the second ultrasound therapy beam to the gastrointestinal tissue decreases circulating insulin concentration.
9 . The method of claim 8 , wherein the first insulin sensitivity regulating molecular pathway and the second insulin sensitivity regulating molecular pathway work in opposition to one another.
10 . The method of claim 8 , comprising acquiring an input indicative of a profile of molecules of interest that comprises glucose and at least one additional molecule of interest.
11 . The method of claim 10 , wherein the at least one additional molecule of interest comprises one or more of insulin, glucagon, glucagon-like peptide 1, glucose transporter 2, norepinephrine, acetylcholine, protein kinase B, insulin receptor substrate 1, proopiomelanocortin, or neuropeptide Y.
12 . The method of claim 8 , wherein applying the first ultrasound therapy beam to the liver or the sub-region of the liver and the second ultrasound therapy beam to the gastrointestinal tissue regulates the circulating glucose concentration within a predefined range.
13 . The method of claim 8 , further comprising adjusting an activation time and/or duration of one or both of applying the first ultrasound therapy beam or the second ultrasound therapy beam based upon an input indicative of the circulating glucose concentration.
14 . A modulation system comprising:
a non-invasive ultrasound probe, configured to emit one or more imaging beams and one or more therapy beams using the same or different transducers; and
a controller configured to:
using an imaging mode of the non-invasive ultrasound probe, direct the non-invasive ultrasound probe toward a porta hepatis of a subject;
using a treatment mode of the non-invasive ultrasound probe, adjustably control the non-invasive ultrasound probe to apply a first therapy beam to the porta hepatis;
using the imaging mode of the non-invasive ultrasound probe or a different non-invasive ultrasound probe, direct the non-invasive ultrasound probe or the different non-invasive ultrasound probe toward a gastrointestinal tissue of the subject;
using the treatment mode of the non-invasive ultrasound probe or the different non-invasive ultrasound probe, adjustably control the non-invasive ultrasound probe or the different non-invasive ultrasound probe to apply a second therapy beam to the gastrointestinal tissue, wherein the second therapy beam to the gastrointestinal tissue decreases circulating insulin concentration; and
receive an input indicative of at least a circulating glucose concentration.