Look inward: brainstem and cortical circuits for boosting interoceptive attention

向内看：脑干和皮质回路增强内感受注意力

• 批准号: 10248456
• 负责人: Mark L Andermann
• 金额: $ 122.5万
• 依托单位: BETH ISRAEL DEACONESS MEDICAL CENTER
• 依托单位国家: 美国
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-09-30 至 2024-07-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/10248456
• 关键词: Acute Pain; Afferent Neurons; Anhedonia; Animal Model; Anorexia Nervosa; Anxiety; Anxiety Disorders; Arthrogryposis; Attention; Auditory; Awareness; Behavior; Behavioral Paradigm; Biological Models; Brain; Brain Stem; Calcium; Cardiovascular Diseases; Cellular Phone; Clinical; Communication; Consumption; Controlled Study; Development; Disease; Eating Disorders; Esthesia; Fatigue; Gastrointestinal Diseases; Genetic Models; Goals; Head; Health; Hearing; Human; Image; Infection; Inflammation; Interoception; Irritable Bowel Syndrome; Learning; Link; Lung; Measures; Medicine; Mental Depression; Mus; Nausea and Vomiting; Neurology; Neuromodulator; Neurons; Nutrient; Obesity; Organ; Pain; Perception; Peripheral; Process; Pruritus; Psychiatry; Rehabilitation therapy; Reporting; Respiration Disorders; Role; Sensory; Signal Transduction; Sleep Apnea Syndromes; Social isolation; Stimulus; Stretching; Sudden infant death syndrome; Tactile; Touch sensation; Training; Vision; Visual; autism spectrum disorder; behavioral study; chemotherapy; chronic pain; improved; innovation; insight; mindfulness meditation; mouse genetics; neural circuit; novel; novel strategies; optogenetics; respiratory; selective attention; transmission process; two-photon

Project Summary/Abstract A vast effort to examine peripheral and central brain circuits underlying external senses such as vision, hearing and touch hearing has yielded broad insights and fueled development of diverse sensory rehabilitation therapies. In contrast, a similar mechanistic understanding of how the brain receives and attends to signals from inside the body is sorely lacking. This is surprising given the growing awareness of the central roles of body-brain communication in a broad range of diseases spanning neurology, psychiatry, and general medicine (e.g. depression and anxiety disorders; autism spectrum disorder; sickness behaviors during peripheral states of infection/inflammation such as fatigue, decrease consumption, social isolation, and anhedonia; eating disorders and obesity; cardiovascular diseases, gastrointestinal diseases, sleep apnea and other respiratory disorders, itch, acute and chronic pain, irritable bowel syndrome, and natural and chemotherapy-induced nausea and vomiting). A roadmap of the specific circuits governing our perception and selective attention to these body signals could give rise to a host of precisely targeted clinical therapies. However, major technological challenges have limited the possibility of well-controlled studies of internal sensation, perception and attention in animal models. Here, I propose to overcome these technical barriers to establish a platform that will enable our lab and others to gain a detailed circuit-level understanding of interoception – the process of attending to and perceiving internal bodily signals – and how this process is disrupted across a range of diseases. I will use my expertise in innovating new strategies for studying the circuit-level basis of visual, auditory and tactile perception to develop a multi-level platform for studying interoception in behaving mice. In particular, we will overcome the following key challenges. First, we will develop a novel operant behavioral paradigm in which head-restrained mice learn to report specific threshold-level body signals. To accurately measure thresholds for perception of specific body signals, we will optogenetically stimulate specific genetically-defined sets of vagal afferent neurons that relay signals from specific body organs (e.g. lung stretch or gut nutrient signals) to the brain. By stimulating at various intensities, we will estimate interoceptive perceptual thresholds, how these thresholds improve with learning (similar to mindfulness and meditation training) and how they worsen in the presence of competing external stimuli (e.g. a flashing cell phone). We will then begin to dissect the neural circuits that gate central processing of specific vagal signals. To this end, we will combine the above behaviors with new approaches for optogenetic manipulation and two-photon calcium imaging of (i) central terminals of vagal afferents, (ii) brainstem serotonergic inputs to regulating vagal afferent transmission and (iii) neurons in insular cortex (implicated in interoceptive attention in humans). Together, this powerful genetic model system will provide a much-needed link between cellular, circuit and behavioral studies of interoception in health and disease.

项目总结/文摘